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Manual - Test Equipment Depot

1. 10 43 Select minimum overshoot criteria 10 44 Query tau and lag values sese 10 44 Set temperature start and stop values 10 44 Initiate autotune eene 10 44 SOURCE subsystem eni piresi etnia eset ange eee sani 10 45 STATus subsystetn einer teneret nrbes e etes pe one 10 46 Read event registers esset tna 10 46 Program event enable registers esee 10 46 Read condition registers esee 10 47 Select default conditions see 10 47 Error q e e E 10 47 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com SYS Tem subsystem acere ener tet vete d ia 10 48 Default conditons seanse ierra Eukan 10 48 Select power line frequency setting usse 10 49 Ia uci C aia 10 50 Simulate key presses esee 10 51 Read version of SCPI standard sususs 10 52 Reset timestamp 1 eerie t edere HER eub serene 10 52 2 wire A wire sense mode sse 10 52 Ground connect mode ccccsesssecceesssseeeeceesssseeeeeeessnee 10 53 R5 232 miterfaee i dc ee EE ERO Elk 10 53 Trigger subsystem eeeeeeeeceeeeeeee eere enitn nennen 10 54 Initiate control measure cycle esee 10 54 Abort source measure cycle
2. eese 10 54 UNIT subsystem eeeseeeeeeeeeeeenee nennen enne nnne 10 54 A Specifications B Status and Error Messages Tint GAUCHO sessen a a E EES B 2 Status and error messages essseesesesreeesreetesrsrrsteresrrsrrresresersrsee B 2 Eliminating common SCPI errors eee B 7 113 Undefined header B 7 410 Query INTERRUPTED sseeseeeee B 7 420 Query UNTERMINATED sesseess B 8 C IEEE 488 Bus Overview licosleilo C 2 Bus description eerie Pete eed C 2 Bus NGS e S C 5 IbriclRwucgu ees C 5 Bus management lines eeseeeeeerenen C 5 Handshake ltnes 2 iere cer ei eee E e Rx C 5 Eee IDE MR C 7 Uniline commands sesirik etate rere reae Pct CHR C 8 Universal multiline commands eene C 8 Addressed multiline commands eese C 9 Address commands eese enne C 9 Unaddress commands cccccsssssscceeesssseeceeessssceeeeeessneeees C 9 Common commands eeessseeeeeeeeee ener C 10 SCPI commands 21 3 errore to ae E Esa C 10 Command CODES 4 rere ret ne xa Nd EXE Uie crass C 10 Typical command sequences eee C 12 IEEE command groups essere C 13 Interface function codes o ccecccccesssssccceeesssceeceesesseeceeessnenees C 14
3. eese 8 3 OPC operation complete eseeeeeeeee 8 3 OPC operation complete query eeeeeee 8 3 OPT option quety eerte ertet 8 3 SAV NR SAV ninais e ri ierit Leto Ute eoe 8 4 RCL NRf recall eisi 8 4 RS TTS sai sass eroe pene trole tm ees 8 4 VURG AUgSer 52 re ere rene e enean 8 4 DS T self test Query aei rime nte ret 8 4 WAJ wait to continue eeeeeseeeeeeeenen nee 8 5 9 SCPI Signal Oriented Measurement Commands Command SUImenaty se ose ere ee interes rr here netter ves egy 9 2 Acquiring readings sese enne ene 9 2 ETCH nido steep een en dettes riter ti rentis 9 2 MEASure lt function gt 0 ecescceesseecssseeeseteeessseeessseeeess 9 3 READ c aoee tots saree eavisesvete E e E Leto ction 9 4 INI Tiate IMMediate 200 ccc cccsccessseecssseeessseeessneeensseeeess 9 4 Command examples esses ener enne 9 4 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 SCPI Command Reference liCaioraeogril m 10 2 General notes eese entrent nnns 10 2 DISPlay subsystem eene 10 14 Control display essere 10 14 Read display eese nennen 10 15 Define TEXT messages eene 10 15 ASCII display values
4. Command Description Default parameter SCPI SENSe 1 4 TEMPerature RTD RANGe n Set RTD resistance range n 0 to 1000 100 100 1000 MIN MAX DEF RANGe Query RTD resistance range ALPHa n Program alpha coefficient for USER type 0 00385 n 0 to 0 01 MINI MAX DEF ALPHa Query alpha coefficient BETA n Program beta coefficient for USER type 0 111 n 0 to 1 MINI MAX I DEF BETA Query beta coefficient DELTa n Program delta coefficient for USER type 1 507 lt n gt 0 to 5 MINI MAX I DEF DELTa Query delta coefficient THERmistor Program thermistor parameters RANGe n Set thermistor resistance range n 0 to 3e5 le4 100 1e3 1e4 1e5 MINI MAX DEF RANGe Query thermistor resistance range AA n Set A parameter value 1 13030e 3 n 10 to 10 MINI MAX DEF A Query A parameter value B lt n gt Set B parameter value 2 33894e 4 lt n gt 10 to 10 MINI MAX DEF B Query B parameter value C lt n gt Set C parameter value 8 85983e 8 lt n gt 10 to 10 MINI MAX DEF iC Query C parameter value VSS Set voltage type solid state sensor parameters GAIN n Program sensor gain scale factor 1 0e 2 n 0 to 9 999e 2 MIN MAX DEF GAIN Query sensor gain OFFSet n Program sensor offset 0 0 n 999 999 to 999 999 MIN MAX DEF OFFSet Query sensor offset ISS Set current type solid state sensor pa
5. esee 7 17 Table 7 7 Event enable registers commands eee 7 18 Table 7 8 Program and read register programming example 7 19 Table 7 9 Error queue commands eene 7 21 8 Common Commands Table 8 1 IEEE 488 2 common commands and queries 8 2 9 SCPI Signal Oriented Measurement Commands Table 9 1 Signal oriented measurement command summary 9 2 10 SCPI Command Reference Table 10 1 DISPlay subsystem commands eene 10 3 Table 10 2 FORMat subsystem commands eee 10 4 Table 10 3 OUTPut subsystem commands eene 10 4 Table 10 4 SENSe 1 subsystem commands eese 10 5 Table 10 5 SOURce 1 subsystem commands esses 10 7 Table 10 6 SOURce2 subsystem commands eee 10 11 Table 10 7 STATus subsystem commands eee 10 12 Table 10 8 SYSTem subsystem commands e 10 13 Table 10 9 Trigger subsystem commands esee 10 13 Table 10 10 UNIT subsystem commands eese 10 14 B Status and Error Messages Table B 1 Status and error messages ssseeeeeeeeeene B 3 C IEEE 488 Bus Overview Table C 1 IEEE 488 bus command summary esee C 7 Table C 2 Hexadecimal and decimal command codes C 10 Table C 3 Typical add
6. esee 1 21 2 Connections Input output connections eese nennen 2 2 Input output connector eene 2 2 2 wire connections eesesseeseeeeeeeen eene nennen rennen 2 2 4 wire connections eeseeseeeeeeeeeen eene eem eee 2 3 Reversing TEC connections eee 2 4 Sense selection eoe nere e n EL HR CX Ce Raus 2 5 OUTPUT Sensin iie rete tr ttt rte 2 5 INPUT Sensing one ei ter ere roter repe 2 5 Sensing considerations sese 2 5 y ic oi 2 5 LOT M 2 6 Ground connect mode essere 2 7 AC ohms measurement essere nene 2 7 3 Basic Operation Safety precautions ecrit riii vise ten dus 3 2 Operation OVet VIEW 5 hice eere ene et vende Ist tee ever Ies eee tees 3 2 Control characteristics eese 3 2 Measurement characteristics esee 3 2 Limit characteristics essere eee 3 3 Configuring functions seseseeeeeeeeeeenee eene 3 3 Configuring temperature sese 3 3 Configuring voltage seen 3 5 Configuring current essere 3 5 Configuring DC resistance seen 3 6 Configuring AC resistance sese 3 6 Configuring output essere ener 3 8 Configuring setpoint tolerance sese 3 8 Adjusting setpoints ec esac aerei teni tree tere tts 3 9 Basic front panel control
7. 3 16 Setpoint tolerance indicator see 3 16 Setpoint tolerance operation sese 3 17 Temperature Sensors ete Deer ep nte cen bl cepa pda 3 18 Open and shorted lead status indications 3 18 Solid state sensor restrictions eee 3 18 Thermistor sensor ranges esee 3 18 RTD sensor ranges eeeesseeeeeeeeenee ener 3 18 4 PID Control Concepts Temperature control model eee 4 2 Temperature control methods eee 4 2 Onsolf control entrer terree 4 3 Proportional P control eee 4 3 Proportional derivative PD control 4 4 Proportional integral derivative PID control 4 4 PUD UII Sas s5s iL S 4 5 PID autotune Model 2510 AT only eene 4 6 Autotune operation sees eene eem ene 4 6 Response options cione toner rte eb niis 4 6 Short Lag and Tau time example 4 6 Long Lag and Tau time example 4 8 Autotune limitations eese 4 9 Practical autotune considerations esee 4 10 TEC module gain eee 4 10 Large temperature steps eee 4 10 PID fine tuning eeeeeseeeeeeeeeeneeenn rennen 4 10 Using autotune commands
8. Command Description STOP Query stop temperature value INITiate Initiate autotune procedure SYSTAU Program rate for SHOR MED or LONG Tau loads SYSTAU Query Systau value Temperature value must be between the upper and lower temperature protection limits Basic autotune procedure The general procedure below outlines the basic steps for using the autotune commands to tune the PID loop Keep in mind that this procedure is intended only as a starting point and some experimentation may be required to obtain the desired results l Send the SOUR1 TEMP ATUN STAR command to program the start temperature value For example the following command would set the start temperature to 45 SOUR1 TEMP ATUN STAR 45 Send the SOUR1 TEMP ATUN STOP command to program the stop temperature value For example the following command would set the stop temperature to 50 SOUR1 TEMP ATUN STOP 50 Set the maximum temperature protection limit for example SOUR1 TEMP PROT HIGH LEV 50 Set the minimum temperature protection limit for example SOUR1 TEMP PROT LOW LEV 0 Set the maximum TEC voltage limit for example SOUR1 VOLT PROT LEV 2 8 Set the maximum TEC current limit for example SENS CURR PROT LEV 1 2 If the system TAU is known to be greater than 100 seconds send the SOUR TEMP ATUN SYSTAU MED command to allow for the slower system response If the system TAU is known to be greater than 200 seconds send the SOUR
9. eee 4 11 Autotune command summary eese 4 11 Basic autotune procedure eese 4 12 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Autotune complete sirisser 4 13 Sensor coefficients noceret dria stai abge cu oct 4 14 Thermistor coefficients eseseeeeeeee 4 14 RTD coeffiCIefls echo ertet 4 14 5 Digital I O Port and Output Enable Digital T O port 1 5 2 tro teet ert eet re ete 5 2 Port configuration 1 nion btt itte titan es 5 2 Digital output lines eee 5 2 Output enable line sisisi 5 3 zb Mm MQ 5 3 Digital output configuration sere 5 3 n eoru 5 3 SOUrCe ODeratlOD 1 cernit ettet aeta Rene 5 4 Controlling digital output lines esee 5 4 Output nable Ne sninen 5 6 OVeryIEW A 5 6 Activating output enable see 5 6 6 Remote Operations Differences remote vs local operation ees 6 2 Local to remote transition esee 6 2 Remote to local transition eee 6 2 Setting interface parameters sssssee 6 2 Selecting an interface enne eee 6 2 GPIB Operation itc reiten ee intere ape dts 6 3 GPIB standards eec eerte etes 6 3 GPIB connections eese etcetera eee ias 6 4 Primary addre
10. Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 12 SCPI Command Reference Models 2510 and 2510 AT User s Manual Table 10 7 STATus subsystem commands Default Command Description parameter SCPI STATus Note 1 4 MEASurement Path to control measurement event registers EVENt Read the event register Note 2 V ENABIe lt NRf gt lt NDN gt Program the enable register Note 3 4 ENABlIe Read the enable register V CONDition Read the condition register V OPERation Path to control operation event registers 4 EVENt Read the event register Note 2 V ENABIe lt NRf gt lt NDN gt Program the enable register Note 3 V ENABlIe Read the enable register V CONDition Read the condition register V QUEStionable Path to control questionable event registers V EVENt Read the event register Note 2 V ENABle lt NRf gt xNDN Program the enable register Note 3 V ENABlIe Read the enable register V CONDition Read the condition register 4 PRESet Return status registers to default states V QUEue Path to access error queue NEXT Read the most recent error message Note 4 4 ENABle lt list gt Specify error and status messages for queue Note 5 4 ENABIe Read the enabled messages 4 DISable lt list gt Specify messages not to be placed in queue Note 5 DISable Read the disabled messages CLEar Clears all messages fr
11. Control function Temperature function Setpoint Protection high limit Protection low limit Protection state Temperature units Sensor current Sensor auto current state Sensor type Sense mode RTD sensor parameters Type Range Alpha a Beta B Delta 6 Thermistor sensor parameters Range A B C Solid state sensor parameters VSS gain VSS offset ISS gain ISS offset Proportional constant Integral constant Derivative constant Voltage function Setpoint Voltage protection limit Proportional constant Integral constant Derivative constant BENCH defaults are the same as SYSTem PRESet defaults Section 10 GPIB defaults are the same as RST defaults Section 8 Not affected by BENCH or GPIB RESET Temperature 25 C 298 15K 77 F 50 C 323 15K 122 F 0 C 273 15K 32 F Enabled Celsius 2 5mA 100Q range RTD 833 3pA 1kQ range 100pA 10kQ range 33 3pA 100kQ range On Thermistor 2 wire PT385 10k 1 13030e 3 2 33894e 4 8 85983e 8 le 2 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 1 17 Getting Started Table 1 3 continued Factory front panel default settings Models 2510 and 2510 AT User s Manual Setting Front panel BENCH and GPIB default Current function Setpoint Current protection limit Proportional constant Integral constant Derivative constant Resistance function Setpoint Protect
12. eene 10 17 FORMgat subsystem eeeeeesseeeseeeeeeeee nne enne 10 19 Data format eite eren tent t yt re tiras 10 19 Data elements eerte nter mtt 10 21 Byte Order iecit tet eere ORE enne tienen 10 23 Status register format 20 0 eee eeeceeeeseeeeeeseeseeeseeeeeeaees 10 24 OU TPU ts bSyStem cn tete tret terrere 10 25 Turn source on or off ssessssssseeeeeeeneene 10 25 Output enable line control eese 10 25 SENSe1 subsystem 0 cs ceessesseesseeseesoeesseeeeeeesesresaseeneeneees 10 26 Current FUNCTION css oic ctii ete rne aiai eiaa 10 26 Resistance function eese 10 27 Temperature function 0 eee eeeeseeeeeseceeeeseeneeeeeeneeaes 10 28 RTD sensor parameters 00 0 0 eee eeeeeeseeeeeeneeseeeaees 10 29 Thermistor sensor parameters 000 0 ee eeeeseeereeeees 10 31 Solid state sensor parameters sesser 10 32 SOURcCe 1 subsystem eese 10 34 Control source output off eese 10 34 Select source function e essesessssesseeseressessteresossesesserressee 10 34 Current TUNCHON Jer e tortor peterent eS 10 35 Resistance function sese 10 36 Temperature function 0 eee eeeeseeeeeseceeeeseeeeeeseeeneeaes 10 38 Voltage function sinisest neen in e 10 41 Setpoint tolerance eese nennen 10 42 PID autotune Model 2510 AT only 10 43 Select minimum settling time criteria
13. identification query 8 3 OPC operation complete 8 3 OPC operation complete query 8 3 OPT option query 8 3 RCL recall 8 4 RST reset 8 4 SAV save 8 4 SENSel subsystem commands 10 5 SOURce 1 subsystem commands 10 7 SOURce2 subsystem commands 10 11 STATus subsystem commands 10 12 SYSTem subsystem commands 10 13 TRG trigger 8 4 TST self test query 8 4 UNIT subsystem 10 14 UNIT subsystem commands 10 14 WAI wait to continue 8 5 Numerics 2 wire connections 2 2 2 wire sensing 2 5 4 wire connections 2 3 4 wire sensing 2 6 5V output 5 3 2510 AT PID autotune 4 6 10 43 AC ohms measurement 2 7 AC resistance 9 3 Configuration 3 6 Accessories 1 3 Acquiring readings 9 2 FETCh 9 2 INITiate 9 4 MEASure 9 3 READ 9 4 Adjusting setpoints 3 9 Front panel procedure 3 10 Protection limits 3 13 Remote command procedure 3 11 Annunciators 1 6 ASCII display values 10 17 Autotune 4 6 Sample procedure 4 12 SCPI commands 10 43 Avoiding common errors B 7 Basic front panel control measure procedure 3 10 Basic remote control measure procedure 3 11 Baud rate 6 6 Bus commands C 7 Cables 1 3 Cables and adapters 1 3 Carrying case 1 4 Characteristics Control 3 2 Limit 3 3 Measurement 3 2 Clearing registers and queues 7 4 Command reference 8 3 IDN 8 3 OPC 8 3 OPC 8 3 OPT 8 3 RCL lt NRf gt 8 4 RST 8 4 SAV lt NRf gt 8 4 TRG 8 4 TST 8 4 WAT 8 5 Command su
14. SENSe 1 RESistance RTD RANGe n Set RTD resistance range Parameters n 0 to 1000 Set RTD resistance range 100 or 1000 MINimum 0 MAXimum 1000 DEFault 100 Query RANGe Query sensor resistance range This command programs the temperature sensor resistance range It affects only RTD sensor types Nominal ranges are 100 and 1000 RANGe n SENSe 1 RESistance THERmistor RANGe n Set thermistor resistance range Parameters n 0 to 3e5 Set thermistor resistance range 100 1e3 1e4 1e5 MINimum 0 MAXimum 3e5 DEFault le4 Query RANGe Query sensor resistance range Description This command programs the temperature sensor resistance range It affects only thermistor sensor types Nominal ranges are 100 1e3 1e4 and 1e5 Temperature function CURRent n SENSe 1 TEMPerature CURRent n Set RTD or thermistor sensor current Parameters lt NRf gt 3e 6 to 2 5e 3 Set sensor current 3 3e 6 1e 5 3 33e 5 le 4 8 333e 4 2 5e 3 MINimum 3e 6 MAXimum 2 5e 3 DEFault 2 5e 3 100 range 8 333e 4 1kQ range le 4 10kQ range 3 33e 5 100kQ range Query CURRent Query sensor current Description This command programs the temperature sensor transducer excitation current It affects only thermistor and RTD sensor types Nominal sen sor currents are 3 3e 6 1e 5 3 33e 5 le 4 8 333e 4 and 2 5e 3 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Model
15. Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com C 11 ale 1 U0q X 801A 4G LOLG 2q AION OLSZ 9poW Aq peyueuro duir Jou TOMINOO INV LOL pue FANDIUNOONN 110d T3T1V3Vd Add GYNDIINOD 110d T3T1V3lv4 Ddd IEEE 488 Bus Overview Models 2510 and 2510 AT User s Manual Figure C 3 Command codes Dds 99d dNOAD dNOUD GONVWWOD GONVIWWOD ASVCONOO3S AIVWIId pee a S M O N an l DV Dv 9N DOV d 1OsD d 1OsD d 1O35 dNOYO SS33ddVv SS33dQ0Vv GONVWWOO GNVWWOD IVE NaLsi TWSYAAINN d3ssdsddv D Dn 1A 1 1 3d o u ul 1 z x u M 8 is 1 n p s 2 1 q b e d ceOxoc2 2 x N GQ mooQuvcor ezazrzzo OQ vec0NO dT iunuoorcoo0c O n umsciconroo9 rv msi oer m D coooecerr er KF OCCOOKr KF HK Q C 0 st t0 0 Fr 0 4 Moy uuino 9g a gt cOoocococcococococ c a gt Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com C 12 IEEE 488 Bus Overview Models 2510 and 2510 AT User s Manual Typical command sequences For the various multiline commands a specific bus sequence must take place to properly send the command In particular the correct listen address must be sent to the instrument before it will respond to addressed commands Table C 3 lists a typical bus sequence for sending the ad
16. 00 500A PEL 01 377V 00 500A Setpoint 00 500A PEL 00 689W 00 500A Setpoint 00 500A PEL 002 75Q 00 500A Setpoint 00 500A RT 002 75kQ Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Getting Started Table 1 1 continued Models 2510 and 2510 AT User s Manual Display examples Function Display toggle sequence Resistance 010 00kQ Setpoint 010 000kQ T 033 200 C 010 00kQ Setpoint 010 000kQ PEL 01 377V 010 00kQ Setpoint 010 000kQ PEL 0 3689A 010 00kQ Setpoint 010 000kQ PEL 00 689W 010 00kQ Setpoint 010 000kQ PEL 002 75Q Use DISPLAY TOGGLE key to cycle through displays for each function Display messages Table 1 2 shows front panel messages that may be displayed during normal operation Table 1 2 Display messages Display message Description OFF OUTPUT turned off UNDER TEMP Temperature below lower limit OVER TEMP Temperature above upper limit ILIM Current limit exceeded VLIM Voltage limit exceeded UNDER OHMS Resistance below lower limit OVER OHMS Resistance above upper limit URR Under resistance range sensor ORR Over resistance range sensor OpenLead Sensor lead open ShrtLead Sensor lead shorted Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Getting Started 1 15 ON OFF indi
17. 10 37 Query GAIN Query proportional constant DERivative Query derivative constant INTegral Query integral constant Description These commands program the resistance function PID loop constants which must be set to appropriate values for suitable control characteris tics See Section 4 PID Control Concepts for information on choosing appropriate values PROTection SOURCe 1 RESistance PROTection HIGH LEVel n SOURCe 1 RESistance PROTection HIGH TRIPped SOURCe 1 RESistance PROTection LOW LEVel n SOURce 1 RESistance PROTection LOW TRIPped SOURce 1 RESistance PROTection STATe lt b gt Parameters HIGH lt n gt 50 to 1 000e3Q 500 to 9 999e3Q 5 000e3 to 8 000e4 2 5 000e4 to 2 000e5Q 50 to 2502 500 to 3 000e3Q MINimum MAXimum DEFault LOW n 1 to 200Q 5 to 2 000e3Q 50 to 2 000e4Q 500 to 2 000e5Q MINimum MAXimum Program resistance high limit Query if high limit exceeded Program resistance low limit Query if low limit exceeded Enable disable protection 100Q thermistor 1kQ thermistor 10kQ thermistor 100kQ thermistor 100Q RTD 1kQ RTD 50 2 100Q RTD or thermistor 500Q 1kQ RTD or thermistor 5 000e3Q 10kQ thermistor 5 000e4Q 100kQ thermistor 1 000e3 2 100Q thermistor 9 999e3Q 1kQ thermistor 8 000e4Q 10kQ thermistor 2 000e5Q 100kQ thermistor 250Q 100 RTD 3 000e3Q 1kQ RTD 200Q 100Q RTD or thermistor 2e3Q 1kQ RTD or the
18. 9x qe qe Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Basic Operation 3 9 Table 3 6 Setpoint tolerance configuration menu Configuration menu item Description SETPOINT TOLERANCE PERCENTAGE Percent of range for setpoint tolerance 0 100906 default 0 5 WINDOW SIZE Number readings to be within tolerance 1 100 default 5 Adjusting setpoints To adjust a setpoint for a particular control function simply press the function key for the particular function T V I or R then press one of the EDIT keys to enter the setpoint adjustment mode Use the EDIT keys to adjust the setpoint as follows Use the left and right arrow keys to place the cursor on the digit to be changed e Use the A and V keys to increase or decrease the setpoint value Table 3 7 summarizes setpoint adjustment ranges for the four control functions NOTE You cannot adjust the setpoint above the upper protection limit setting all functions or below the lower protection setting temperature and resistance Table 3 7 Setpoint adjustment ranges Function Adjustment range Temperature T 50 to 225 C Constant Peltier temperature 223 15 to 498 15K 58 to 437 F Voltage V 10 to 10V Constant Peltier voltage Current T 5 to 5A Constant Peltier current Resistance R 1 to 1kQ 100Q thermistor Constant thermistor re
19. Message ALL Return all errors COUNt Return how many errors CODE NEXt Return the latest error code ALL Return all error codes CLEar Clears messages from the Error Queue LFRequency Sets the Line Frequency 50 or 60Hz Note LFRequency Returns the Line Frequency 50 or 60Hz TIME RESet Resets the Model 2510 s absolute timestamp RSENSse lt b gt Enable ON or disable OFF 4 wire measurement OFF RTD and thermistor sensors only RSENse Query 4 wire measurement state GCONnect b Connects ON or disconnects OFF input output OFF negative terminals to or from analog common GCONnect Query ground connect state LOCal Take 2510 out of remote REMote Put 2510 in remote RWLock Enable local lockout Note The line frequency setting is not affected by RST or SYSTem PRESet Table 10 9 Trigger subsystem commands Default Command Description parameter SCPI INITiate IMMediate Take instrument out of IDLE begin taking readings 4 ABORt Turn output off put instrument in IDLE v Trigger commands are functional only in calibration mode See Service Manual Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 14 SCPI Command Reference Models 2510 and 2510 AT User s Manual Table 10 10 UNIT subsystem commands Default Command Description parameter SCPI UNIT Path to control temperature measurement un
20. Standard Event 5 113 Undefined header EE Standard Event 5 112 Program mnemonic too long EE Standard Event 5 111 Header separator error EE Standard Event 5 110 Command header error EE Standard Event 5 109 Missing parameter EE Standard Event 5 108 Parameter not allowed EE Standard Event 5 105 GET not allowed EE Standard Event 5 104 Data type error EE Standard Event 5 103 Invalid separator EE Standard Event 5 102 Syntax error EE Standard Event 5 101 Invalid character EE Standard Event 5 100 Command error EE Standard Event 5 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Table B 1 continued Status and error messages Status and Error Messages Number Error message Event Status register Bit 000 No error SE Measurement events 100 Over Temperature SE Measurement Event 0 101 Under Temperature SE Measurement Event 1 102 Over Voltage SE Measurement Event 2 103 Current Overload SE Measurement Event 3 104 Over Resistance SE Measurement Event 4 105 Under Resistance SE Measurement Event 5 106 Reading available SE Measurement Event 6 107 Reading overflow SE Measurement Event 7 111 OUTPUT Enable asserted SE Measurement Event 11 112 OUTPUT at setpoint SE Measurement Event 12 113 Open Lead SE Measurement Event 1
21. 6 Not Used 7 4 5V 8 Output Enable 9 Ground wA e Em Ta Misa eu h WITH FRONT PANEL MENU e e om TRIGGER RS 232 LINE FUSE Secs A LINE RATING MEAT E EA CA TON FOA CONTINUED PROTECTION z IE HAZARDO REPLACE FUSE WITH TYPE AND RATING W T m Digital output lines The port provides four output lines Each open collector output can be set high 5V or low OV Each output line can source up to 2mA or all four lines together can sink up to 500mA Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Digital I O Port and Output Enable 5 3 Output enable line The output enable line is intended for use with a test fixture to disable the output when the protection lid is open See Output enable line page 5 6 for details 5V output The Digital I O Port provides a 5V output that can be used to drive external logic cir cuitry Maximum current output for this line is 600mA This line is protected by a self resetting fuse one hour recovery time Digital output configuration There are two basic methods to connect external components to the digital output lines sink operation and source operation Sink operation Figure 5 2 shows the basic output configuration for sink operation Note that the external relay coil is connected between the digital output line pins 1 to 4 and 5V pin 7 With this confi
22. Bit 3 CO of the Measurement Event Register will be set and you can program the unit to generate an SRQ if the current limit is exceeded see Section 7 Note that OUTPUT ON OFF is not inhib ited by exceeding the current limit To program the current limit press CONFIG then I then select PROTECTION and pro gram the limit as required See Configuring current page 3 5 for details Resistance protection limits The upper and lower resistance limits apply only to RTD and thermistor sensors see Table 3 8 If the lower limit is exceeded URR will be displayed and Bit 5 UR of the Measurement Event Register will be set If the upper limit is exceeded ORR will be dis played and Bit 4 OR of the Measurement Event Register will be set You can program the unit to generate an SRQ if either limit is exceeded see Section 7 OUTPUT ON OFF is inhibited by exceeding either resistance limit To program the resistance limits press CONFIG then R then select PROTECTION and program the limits as required See Configuring DC resistance page 3 6 and Configuring AC resistance page 3 6 for details Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Voltage and current limit operating boundaries Basic Operation 3 15 The combination of the voltage and current limits restricts the allowed operating area or operating boundaries as
23. Choose GND CONNECT then press ENTER ENABLE or DISABLE ground connect as required then press ENTER If you are using the output enable circuit see Section 5 select ENABLE then press ENTER Select ENABLE from the OUTPUT ENABLE menu then press ENTER again 5 Press EXIT to return to normal display qs hs Table 3 5 Output configuration menu Configuration menu item Description GND CONNECT Select input output analog common ground connection DISABLE Disable ground connection ENABLE Enable ground connection ENABLE Enable disable Digital I O port output enable line DISABLE Inactivate output enable line ENABLE Activate output enable line See Section 2 for information on reversal and ground connect modes See Output enable line page 5 6 for output enable information Configuring setpoint tolerance Using Table 3 6 as a guide follow the steps below to configure setpoint tolerance See Setpoint tolerance page 3 15 for more details 1 Press CONFIG then any one of the four EDIT keys to access the setpoint tolerance menu From the SETPOINT TOLERANCE MENU select PERCENTAGE then press ENTER Choose PERCENTAGE then press ENTER Using the EDIT keys set the percentage to the desired value then press ENTER Choose WINDOW SIZE then press ENTER Use the EDIT keys to set the number of readings to be within the tolerance win dow then press ENTER 7 Press EXIT to return to normal display 13
24. MINimum MAXimum DEFault INTegral lt n gt Oto le5 MINimum MAXimum DEFault GAIN DERivative INTegral Program proportional constant Program derivative constant Program integral constant Set proportional constant value 0 le5 10 0 Set derivative constant value 0 le5 0 0 Set integral constant value 0 le5 20 0 Query proportional constant Query derivative constant Query integral constant These commands program the voltage function PID loop constants which must be set to appropriate values for suitable control characteris tics See Section 4 PID Control Concepts for information on choosing appropriate values Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 42 SCPI Command Reference Models 2510 and 2510 AT User s Manual PROTection SOURce 1 VOLTage PROTection LEVel n Program voltage limit SOURce 1 VOLTage PROTection TRIPped Query if voltage limit exceeded Parameters lt n gt 0 5 to 10 5V Set voltage limit value MINimum 0 5 MAXimum 10 5 DEFault 10 5 Query LEVel Query voltage limit TRIPped Query if voltage limit exceeded 1 exceeded Description The LEVel command programs the voltage limit for the voltage func tion The TRIPPed query returns a value of 1 if the voltage limit is exceeded or a value of 0 if it is not exceeded These protection com mands are active only for the voltage function an
25. No Error is placed in the queue Messages in the Error Queue are preceded by a code number Negative numbers are used for SCPI defined messages and positive numbers are used for Keithley defined messages As shown in Table 7 9 there are commands to read the entire message code and message or the code only On power up all error messages are enabled and will go into the Error Queue as they occur Status messages are not enabled and will not go into the queue As listed in Table 7 9 there are commands to enable and or disable messages For these commands the lt list gt parameter is used to specify which messages to enable or disable The messages are specified by their codes The following examples show various forms for using the lt list gt parameter lt list gt 110 Single message 110 222 Range of messages 110 through 222 110 222 220 Range entry and single entry separated by a comma When you enable messages messages not specified in the list are disabled When you dis able messages each listed message is removed from the enabled list NOTE To prevent all messages from entering the Error Queue send the enable com mand along with the null list parameter as follows STATus QUEue ENABle Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Status Structure 7 21 Table 7 9 Error queue commands C
26. S PRINT 1 OUTPUT 15 PRINT 1 ENTER 15 INPUT 2 Power PRINT TEC power at NEXT Setpoint PRINT 1 OUTPUT 15 PRINT Done END RST n STAT MEAS ENAB 4096 SRE 1 SOUR STOL 1 SOUR STOL COUN 10 SOUR TEMP PROT 90 OUTP ON 80 STEP 10 SOUR TEMP Setpoint Setpoint degree setpoint CLS MEAS POW Setpoint degree setpoint OUTP OFF Open IEEE 488 output path Open IEEE 488 input path Set input terminator Set output terminator Put 2510 in remote Restore GPIB defaults Enable SRQ on SPT 1 setpoint tolerance 10 reading tolerance window Upper temp limit 90 deg Turn on output Loop for 40 to 80 deg Program temp setpoint setpoints to stabilize Request SRQ status Input SRQ status byte Wait for setpoint tolerance Clear SPT Serial poll unit to clear SRQ Query TEC power reading Power Turn off output Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com GPIB 488 1 Protocol Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com F 2 GPIB 488 1 Protocol Models 2510 and 2510 AT User s Manual Introduction The SourceMeter supports two GPIB protocols SCPI and 488 1 The 488 1 protocol is included to significantly increase speed over the GPIB When using the 488 1 protocol throughput is enhanced up to 10 times for data sent to the Sourc
27. Subsequent keypresses cycle through tests that turn off annunciators and corner pixels of each digit turn on the rows of the top left display digit and turn on all annunciators and pixels of each digit in a sequential manner Press EXIT to can cel this test CHAR SET This test displays special characters Press EXIT to cancel the test See Menus page 1 19 for more menu information Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 1 16 Getting Started Models 2510 and 2510 AT User s Manual Default settings By using appropriate menu selections you can save and recall various instrument setups define the power on configuration or restore factory defaults as outlined below Saving and restoring user setups You can save and restore five of your own user setups as covered below This feature pro vides a convenient way to save specific instrument configurations and then recall them as needed Note that you can also set up the Model 2510 to restore a specific user setup at power on see Power on configuration page 1 16 See Section 8 for information on using SAV and RCL to perform these operations by remote Saving setups 1 Select the various instrument operating modes you wish to save 2 Press the MENU key select SAVESETUP then press ENTER 3 Select SAVE then press ENTER 4 Select the setup position 0 to 4 to save then press ENTER to complete the process R
28. The STATus subsystem is used to control the status registers of the Model 2510 The com mands in this subsystem are summarized in Table 10 7 NOTE These registers and the overall status structure are fully explained in Section 7 Read event registers EVENt STATus MEASurement EVENt 2 STATus QUEStionable EVENt STATus OPERation EVENt Description Read Measurement Event Register Read Questionable Event Register Read Operation Event Register These query commands are used to read the contents of the status event registers After sending one of these commands and addressing the Model 2510 to talk a value is sent to the computer This value indicates which bits in the appropriate register are set Program event enable registers ENABle lt NDN gt or lt NRf gt STATus MEASurement ENABle lt NDN gt or lt NRf gt STATus QUEStionable ENABle lt NDN gt or lt NRf gt STATus OPERation ENABle lt NDN gt or lt NRf gt Parameters Query Description lt NDN gt _ Bxx x Hx Ox lt NRf gt 0 to 65535 ENABle Program Measurement Event Enable Register Program Questionable Event Enable Register Program Operation Event Enable Register Binary format each x 1 or 0 Hexadecimal format x 2 0 to FFFF Octal format x 0 to 177777 Decimal format Read an enable register These commands are used to program the enable registers of the status structure The binary equivalent of the parameter v
29. Undefined header This error indicates that the command you sent to the instrument did not contain a recog nizable command name The most likely causes for this error are Missing space between the command and its parameter There must be one or more spaces blanks between the command and its parameter For example SENS TEMP THER RANGIOO Incorrect no space between command and parameter SENS TEMP THER RANG 100 Correct Improper short or long form Check the command lists in Section 10 for the correct command name Blanks spaces within the command name For example SYST ERR Incorrect space between SYST and ERR SYST ERR Correct 410 Query INTERRUPTED This error occurs when you have sent a valid query to the instrument and then send it another command or query or a Group Execute Trigger GET before it has had a chance to send the entire response message including the line feed EOI terminator The most likely causes are Sending a query to the instrument and then sending another command or query before reading the response to the first query For example the following sequence of commands will cause an error 410 SSYST ERR OPC This sequence generates an error because you must read the response to SYST ERR before sending the OPC query Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Statu
30. length defaults to 32 single precision format Query DATA Query data format Description This command is used to select the data format for transferring readings over the bus Only the ASCII format is allowed over the RS 232 inter face This command only affects the output of READ FETCh and MEASure lt function gt over the GPIB All other queries are returned in the ASCII format NOTE Regardless of which data format for output strings is selected the Model 2510 will only respond to input commands using the ASCII format ASCII format The ASCII data format is in a direct readable form for the operator Most high level computer languages easily convert ASCII mantissa and exponent to other formats However some speed is compromised to accommodate the conversion Figure 10 1 shows an example ASCII string that includes all the data elements See ELEMents item list gt page 10 21 Figure 10 1 also shows the byte order of the data string Data elements not specified by the ELEMents command are simply not included in the string Keep in mind that the byte order can only be reversed for the binary for mat See BORDer lt name gt page 10 23 ASCII data format 1 100000E 01 1 000206E 00 1 000000E 00 1 000000 00 1 000000E 03 1 000000E 01 7 282600E 01 4 813200E 04 T Temperature Reading elie Ae qe cul Voltage Current Power Resistance Sensor Time Status Reading Reading Reading Readin
31. tuning parameters These PID parameters can be improved upon by iterative adjustments which are covered later in this section Autotune operation The Model 2510 AT PID autotune algorithm obtains its information from the system by forcing a step function in voltage across the TEC and then observes the system response to that step function The Lag and Tau times of this response waveform are then extracted and applied to a modified version of the Ziegler Nichols tuning equations Response options There are two different options for the autotune function minimum settling time and min imum overshoot The discussion below compares these two options based on short and long Lag and Tau T times Short Lag and Tau time example Typical response characteristics for the two response options are shown in Figure 4 4 In these examples the Laser Diode Module has a Lag time of 0 77 seconds and a Tau of 7 70 seconds and is subjected to a 3 C step in temperature setpoint For the minimum settling time plot the temperature overshoot occurred at 3 274 seconds with a peak value of 26 09 C It settles to within 0 1 of the final temperature 0 003 C in 11 14 seconds In the minimum overshoot case the temperature overshoot occurs at 4 96 seconds with a peak value of 25 67 C It settles to within 0 1 of the final temperature 25 503 C at 27 32 seconds See Table 4 1 Table 4 1 Response time comparison example 1 laser diode Lag Time
32. 0 77sec Tau Time 7 70sec Condition Minimum Settling Time Minimum Overshoot Max Overshoot 26 09 C 3 274 Sec after Step 25 67 C 4 96 Sec after Step Settle to 0 196 25 497 C 11 14 Sec after Step 25 503 C 27 32 Sec after Step Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual PID Control Concepts 4 7 Figure 4 4 Response comparison example 1 short Lag and Tau times Laser Diode Module with Minimum Settling Time Settled to 1 0 Settled to 0 1 0 030 C 0 003 C A For 3 C step Settled to 1 0 0 030 C in 8 54 seconds Settled to 0 1 0 003 C in 11 14 seconds Laser Diode Module with Minimum Overshoot Settled to 1 0 Settled to 0 1 0 030 C 0 003 C B For a 3 C step Settled to 1 0 0 030 C in 15 32 seconds Settled to 0 1 0 003 C in 27 32 seconds Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 4 8 PID Control Concepts Models 2510 and 2510 AT User s Manual Long Lag and Tau time example In order to demonstrate the benefits of response tuning refer to the example of a system with very long Lag and Tau times shown in Figure 4 5 In this example the load has a Lag time of 11 0 seconds and a Tau of 107 0 seconds and is subjected to a 3 C step in temperature setpoint For the minimum settling time plot the temperature
33. 10 IEEE 488 Bus Overview Models 2510 and 2510 AT User s Manual Common commands Common commands are commands that are common to all devices on the bus These com mands are designated and defined by the IEEE 488 2 standard Generally these commands are sent as one or more ASCII characters that tell the device to perform a common operation such as reset The IEEE 488 bus treats these commands as data in that ATN is false when the commands are transmitted SCPI commands SCPI commands are commands that are particular to each device on the bus These com mands are designated by the instrument manufacturer and are based on the instrument model defined by the Standard Commands for Programmable Instruments SCPI Consor tium s SCPI standard Generally these commands are sent as one or more ASCII characters that tell the device to perform a particular operation such as setting a range or closing a relay The IEEE 488 bus treats these commands as data in that ATN is false when the commands are transmitted Command codes Command codes for the various commands that use the data lines are summarized in Figure C 3 Hexadecimal and the decimal values for the various commands are listed in Table C 2 Table C 2 Hexadecimal and decimal command codes Command Hex value Decimal value GTL 01 1 SDC 04 4 GET 08 8 LLO 11 17 DCL 14 20 SPE 18 24 SPD 19 25 LAG 20 3F 32 63 TAG 40 5F 64 95 SCG 60 7F 96 127 UNL 3F 63 UNT SF 95
34. 14 Remote Operations Models 2510 and 2510 AT User s Manual numlist Numlist Specify one or more numbers for a list Example STATus QUEue ENABIle 110 222 Enable errors 110 through 222 NDN Non decimal numeric This parameter is used to send values in the binary octal or hexadecimal format The prefix designates the format type SBxx x B specifies the binary format Xx X is the binary number using Os and 1s HOQxx x Q specifies the octal format Xx x is the octal number values 0 through 7 HXx x H specifies the hexadecimal format Xx X is the hexadecimal number values 0 through 9 and A through F Examples to send the decimal value 36 in the non decimal formats ESE b100100 Binary format ESE q44 Octal format ESE h24 Hexadecimal format Angle brackets gt Angle brackets lt gt are used to denote a parameter type Do not include the brackets in the program message Query commands This type of command requests queries the presently programmed status It is identified by the question mark at the end of the fundamental form of the command Most com mands have a query form SOURce VOLTage Queries the output voltage Case sensitivity Common commands and SCPI commands are not case sensitive You can use upper or lower case and any case combination Examples RST rst SYSTem PRESet system preset NOTE Using all upper case will result in slightly
35. 15 to 523 15K 58 to 482 F HILIM Program higher limit 50 to 250 C 223 15 to 523 15K 58 to 482 F SENSOR TYPE Select sensor type and settings THERMISTOR Program thermistor settings RANGE Set thermistor range 100 1kQ 10kQ 100kQ A Program A coefficient 10 to 10 B Program B coefficient 10 to 10 C Program C coefficient 10 to 10 I SRC Set thermistor current AUTO 3 3pA 10pA 33 3pA 100pA 833 3pA 2 5mA SENSE MODE Select 2 WIRE or 4 WIRE sense mode RTD Program RTD sensor parameters TYPE Select PT385 PT3916 PT100 D100 F100 USER type Program USER o p 0A Program USER alpha 0 to 0 01 B Program USER beta 0 to 1 Program USER delta 0 to 5 RANGE Set RTD range 100Q or 10009 I SRC Set RTD current AUTO 3 3uA 10pA 33 3uA 100pA 833 3pA 2 5mA SENSE MODE Select 2 WIRE or 4 WIRE sense mode ISS Program current solid state sensor settings OFFSET Program offset K 999 999 to 999 999 SCALE FACTOR Program slope K A 0 to 9 999e 4 VSS Program voltage solid state sensor settings OFFSET Program offset K 999 999 to 999 999 SCALE FACTOR Program slope K A 0 to 9 999e 2 UNITS Select temperature units C Kelvin F PID Program PID loop constants for temperature PROPORTIONAL Set proportional constant 0 to 100000 INTEGRAL Set integral constant 0 to 100000 DERIVATIVE Set derivative constant 0 to 100000 Lower limit cannot be set higher than higher limit Highe
36. 199 i 247 box7 152 selftest11 200 i 248 box8 153 selftest12 201 249 box9 154 selftest13 202 250 tombstone 155 selftest14 203 Y 251 156 boxl 204 Pt 252 T 157 box2 205 f 253 158 5 206 254 gt 159 A 207 255 c 160 0 208 161 209 162 A 210 163 3 211 164 7 212 a 165 5 213 166 7 214 167 7 215 a 168 8 216 A 169 i 217 170 a 218 171 p 219 172 y 220 173 8 221 174 222 E 175 n 223 176 0 224 i 177 225 i 178 D 226 i 179 p 221 180 o 228 181 1 229 182 o 230 183 o 231 2 184 T 232 185 A 233 186 X 234 187 o 235 188 a 236 189 U 237 U 190 I 238 191 lt 239 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual SCPI Command Reference 10 19 FORMat subsystem The commands for this subsystem are used to select the data format for transferring instru ment readings over the bus These commands are summarized in Table 10 2 Data format Figure 10 1 DATA type length FORMat DATA type length Select data format Parameters lt type gt lt length gt ASCii ASCII format REAL 32 IEEE754 single precision format SREal IEEE754 single precision format NOTE length is not used for the ASCii or SREal parameters It is optional for the REAL parameter If you do not use length with the REAL parameter the
37. 210 Trigger error EE Standard Event 4 202 Settings lost due to rtl EE Standard Event 4 201 Invalid while in local EE Standard Event 4 200 Execution error EE Standard Event 4 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com B 3 B 4 Status and Error Messages Models 2510 and 2510 AT User s Manual Table B 1 continued Status and error messages Number Error message Event Status register Bit 178 Expression data not allowed EE Standard Event 5 171 Invalid expression EE Standard Event 5 170 Expression error EE Standard Event 5 168 Block data not allowed EE Standard Event 5 161 Invalid block data EE Standard Event 5 160 Block data error EE Standard Event 5 158 String data not allowed EE Standard Event 5 154 String too long EE Standard Event 5 151 Invalid string data EE Standard Event 5 150 String data error EE Standard Event 5 148 Character data not allowed EE Standard Event 5 44 Character data too long EE Standard Event 5 141 Invalid character data EE Standard Event 5 140 Character data error EE Standard Event 5 128 Numeric data not allowed EE Standard Event 2 124 Too many digits EE Standard Event 5 123 Exponent too large EE Standard Event 5 121 Invalid character in number EE Standard Event 5 120 Numeric data error EE Standard Event 5 114 Header suffix out of range EE
38. 3 16 Menus 1 26 Operation 3 17 Setting Interface parameters 6 2 Settings 1 16 Factory defaults 1 16 Line frequency 1 9 Saving and restoring user setups 1 16 Solid state sensor restrictions 3 18 SOURce 1 subsystem 10 34 Control source output off 10 34 Current function 10 35 Resistance function 10 36 Select source function 10 34 Setpoint tolerance 10 42 Temperature function 10 38 Voltage function 10 41 SOURce2 subsystem 10 45 SPE SPD serial polling 6 12 7 9 Specifications A 1 Status and error messages 1 15 B 2 Status byte and service request commands 7 10 Status byte and SRQ 7 2 7 7 Status byte register 7 8 Status register 16 bit 7 5 Status register sets 7 2 7 11 Status register structure 7 3 Status structure 7 1 STATus subsystem 10 46 Error queue 10 47 Program event enable registers 10 46 Read condition registers 10 47 Read event registers 10 46 Select default conditions 10 47 Syntax 6 12 System identification 1 9 SYSTem subsystem 10 48 2 wire 4 wire sense mode 10 52 Default conditions 10 48 Error queue 10 50 Ground connect mode 10 53 Read version of SCPI standard 10 52 Reset timestamp 10 52 RS 232 interface 10 53 Select power line frequency setting 10 49 Simulate key presses 10 51 TEC control algorithms Proportional P 4 3 Proportional derivative 4 4 Proportional integral derivative 4 4 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com TEC c
39. 4 2 PID Control Concepts Models 2510 and 2510 AT User s Manual Temperature control model Figure 4 1 shows the overall control model for the system The Model 2510 provides cur rent to the thermoelectric cooler TEC which uses the Peltier effect to maintain tempera ture at the desired setpoint When current is forced through the TEC in one direction the device heats when current is forced through the TEC in the opposite direction the device cools In this manner temperature is maintained at the setpoint and equilibrium can be maintained Temperature feedback for the PID controller is provided by the temperature sensor which is in thermal contact with the thermoelectric cooler PID control parameters can be individually set to assure optimum temperature control as outlined below Figure 4 1 Temperature control model Temperature Feedback Signal Temperature Sensor PID Controller l Thermal Contact Thermoelectric Cooler Model 2510 TEO Control Signal Temperature control methods The following discussion outlines comparisons between various temperature control methods Terms for this discussion are defined as follows Tg setpoint temperature To cooler temperature W power applied to thermoelectric cooler Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual PID Control Concepts 4 3 On off
40. 6 Service request enable 7 9 Standard event 7 11 Status byte 7 8 Remote interface GPIB 6 3 RS 232 6 6 Selection 6 2 Remote operation 6 1 REN remote enable 6 11 Resistance Menus 1 25 Protection limits 3 14 Readings 1 12 Resistance measurement AC 9 3 DC 9 3 Response messages 6 18 Restoring setups 1 16 RS 232 6 6 Connections 6 8 RTD coefficients 4 14 RTD sensor ranges 3 18 SCPI commands 10 5 Safety Precautions 3 2 Symbols and terms 1 2 Saving setups 1 16 SCPI Eliminating common errors B 7 SCPI command reference 10 1 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com SCPI Commands DISPlay subsystem 10 3 10 14 FORMat subsystem 10 4 10 19 OUTPut subsystem 10 4 10 25 SENSe 1 subsystem 10 5 10 26 SOURce 1 subsystem 10 7 10 34 SOURce2 subsystem 10 11 10 45 STATus subsystem 10 12 10 46 SYSTem subsystem 10 13 10 48 Trigger subsystem 10 13 10 54 UNIT subsystem 10 14 10 54 SCPI reference tables 10 2 SCPI signal oriented measurement commands 9 1 SDC selective device clear 6 12 Selecting an interface 6 2 SENSel subsystem 10 26 Current function 10 26 Resistance function 10 27 Temperature function 10 28 Sensing 2 wire 2 5 4 wire 2 6 Considerations 2 5 INPUT 2 5 OUTPUT 2 5 Sensor coefficients 4 14 RTD coefficients 4 14 Thermistor coefficients 4 14 Serial number identification 1 9 Serial polling and SRQ 7 9 Setpoint tolerance 3 15 Configuration 3 8 Indicator
41. 65 82110 Germering 089 84 93 07 40 Fax 089 84 93 07 34 GREAT BRITAIN Unit 2 Commerce Park Brunel Road Theale Berkshire RG7 4AB 0118 929 7500 Fax 0118 929 7519 INDIA Flat 2B Willocrissa 14 Rest House Crescent Bangalore 560 001 91 80 509 1320 21 Fax 91 80 509 1322 ITALY Viale San Gimignano 38 20146 Milano 02 48 39 16 01 Fax 02 48 30 22 74 JAPAN New Pier Takeshiba North Tower 13F 11 1 Kaigan 1 chome Minato ku Tokyo 105 0022 81 3 5733 7555 Fax 81 3 5733 7556 KOREA 2FL URI Building 2 14 Yangjae Dong Seocho Gu Seoul 137 888 82 2 574 7778 Fax 82 2 574 7838 NETHERLANDS Postbus 559 4200 AN Gorinchem 0183 635333 Fax 0183 630821 SWEDEN c o Regus Business Centre Frosundaviks All 15 4tr e 169 70 Solna 08 509 04 679 Fax 08 655 26 10 SWITZERLAND Kriesbachstrasse 4 8600 D bendorf 01 821 94 44 e Fax 01 820 30 81 TAIWAN 1FL 85 Po Ai Street Hsinchu Taiwan R O C 886 3 572 9077 Fax 886 3 572 9031 4 02 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Model 2510 and 2510 AT TEC SourceMeter User s Manual All references to the Model 2510 apply to the Model 2510 AT unless otherwise specified 2001 Keithley Instruments Inc All rights reserved Cleveland Ohio U S A Fifth Printing February 2002 Document Number 2510 900 01 Rev E Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 0217
42. BO B2 B3 B4 B5 and B7 of the Status Byte Register These summary bits do not latch and their states 0 or 1 are solely dependent on the summary messages 0 or 1 For example if the Standard Event Register is read its register will clear As a result its summary message will reset to 0 which in turn will reset the ESB bit in the Status Byte Register The bits of the Status Byte Register are described as follows Bit B0 Measurement Summary Bit MSB Set summary bit indicates that an enabled measurement event has occurred Bit B1 Not used Bit B2 Error Available EAV Set summary bit indicates that an error or status message is present in the Error Queue Bit B3 Questionable Summary Bit QSB Set summary bit indicates that an enabled questionable event has occurred Bit B4 Message Available MAV Set summary bit indicates that a response message is present in the Output Queue Bit B5 Event Summary Bit ESB Set summary bit indicates that an enabled standard event has occurred Bit B6 Request Service RQS Master Summary Status MSS Set bit indi cates that an enabled summary bit of the Status Byte Register is set Bit B7 Operation Summary OSB Set summary bit indicates that an enabled operation event has occurred Depending on how it is used Bit B6 of the Status Byte Register is either the Request for Service RQS bit or the Master Summary Status MSS bit When using the serial poll s
43. DERivative Query temperature derivative constant V INTegral Query temperature integral constant V TRANsfer Accept and install MSET constants as defaults V MOVershoot Use minimum overshoot criteria V GAIN Query temperature gain constant 4 DERivative Query temperature derivative constant V INTegral Query temperature integral constant V TRANsfer Accept and install MOV constants as defaults 4 TAU Query tau value V LAG Query lag value 4 STARt lt n gt Set start temperature value Not to exceed V temperature protection level STARt Query temperature start value V STOP n Set stop temperature value 4 STOP Query stop temperature value Not to exceed 4 temperature protection level INITiate Initiate autotune procedure V SYSTAU Program initial skip rate for SHOR MED or LONG Tau loads SYSTAU Query Systau value LCONstants Program temperature PID loop constants V GAIN n Set temperature gain 20 0 V n 0 to le5 MIN MAX DEF GAIN Query temperature gain V DERivative n Set temperature derivative constant 0 0 V n 0 to le5 MINI MAX DEF DERivative Query temperature derivative constant V INTegral n Set temperature integral constant 0 6 V n 0 to le5 MIN MAX DEF INTegral Query temperature integral constant V Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 10 SCPI Command Refe
44. For USER type set a B and 6 RANGE Select 100 or 1000 e SRC Set RTD current AUTO 3 3pA 10pA 33 3pA 100pA 833 3pA or 2 5mA e SENSE MODE Choose 2 WIRE or 4 WIRE sensing Use 4 wire for sensors lt 1kQ From the CONFIG RESISTANCE menu choose PID then press ENTER Program the PROPORTIONAL INTEGRAL and DERIVATIVE constants as required After programming press EXIT as necessary to return to normal display Configuring AC resistance 1 Press CONFIG then R to access the resistance configuration menu Select AC OHMS then press ENTER The output will turn off if enabled and the Model 2510 will then display the AC resistance of the TEC whenever the resistance function is enabled by pressing the R function button To return to DC resistance operation when the resistance function is enabled enter the resistance configuration menu select FUNCTION then press ENTER To configure DC resistance select TEMP CONTROL then program parameters as usual NOTE See AC ohms measurement page 2 7 for more information Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Basic Operation Table 3 4 Resistance configuration menu 3 7 Configuration menu item Description FUNCTION Select DC resistance function AC OHMS Select AC resistance function TEMP CONTROL Program DC resistance parameters PROTECTION Configure
45. INITiate MMediate These brackets indicate that IMMediate is implied optional and does not have to be used Thus the above command can be sent in one of two ways INITiate or INITiate IMMediate NOTE The optional command is used without the brackets When using optional com mand words in your program do not include the brackets Parameter types The following are some of the more common parameter types lt b gt Boolean Used to enable or disable an instrument operation 0 or OFF dis ables the operation and 1 or ON enables the operation Example SOUR TEMP PROT STAT ON Enable temperature protection name Name parameter Select a parameter name from a listed group lt NRf gt Numeric representation format This parameter is a number that can be expressed as an integer e g 8 a real number e g 23 6 or an exponent 2 3E6 n Numeric value A numeric value parameter can consist of an NRf number or one of the following name parameters DEFault MINimum MAXimum When the DEFault parameter is used the instrument is programmed to the RST default value When the MINimum parameter is used the instrument is programmed to the lowest allowable value When the MAXimum parameter is used the instrument is programmed to the largest allowable value Example SOURce CURRent 2 Sets current to 2A Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 6
46. RTD sensor TEMP RTD RANG 100 Set 100Q range TEMP CURR AUTO ON Use default RTD sensor current iSYST RSEN ON Enable 4 wire sensing SOUR TEME LCON 10 Temperature gain constant 10 SOUR TEMPE LCON INT 0 5 Temperature integral constant 0 5 SOUR TEMP LCON DER 0 Temperature derivative constant 0 Step 4 Program setpoint Program the setpoint for the selected control function For example the following com mand programs the temperature setpoint to 50 SOUR TEMP 50 Step 5 Set current limit If required set the current limit with this command SENS CURR PROT Current Limit Step 6 Turn output on Turn the output on to begin PID control by sending the following commands OUTP ON Step 7 Request readings During operation you can request readings with the FETCH query Note that bus read ing elements are controlled with the FORM ELEM command You can also request addi tional reading types with the following queries MEAS POW Query thermoelectric cooler power MEAS CURR Query cooler current MEAS TEMP Query temperature MEAS RES Query cooler DC resistance MEAS VOLT Query cooler voltage Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Basic Operation 3 13 Step 8 Turn output off When finished turn the output off and halt PID control by sending OUTP OFF Protection limits Protection limits for
47. Resistance Operation Range 275 C 275K 495 F 20V 10A 200kQ 100kQ thermistor 80kQ 10kQ thermistor 10kQ 1kQ thermistor or RTD 1kQ 100 thermistor or RTD To configure the setpoint tolerance feature from the front panel press CONFIG followed by any one of the four EDIT keys lt A V gt The unit will display the setpoint tolerance configuration menu See Configuring setpoint tolerance page 3 8 and Table 3 6 Use the EDIT ENTER and EXIT keys to set the percent tolerance and window size as required Setpoint tolerance indicator The front panel annunciator will turn on when the output is within the setpoint toler ance for the programmed number of readings The unit can also be programmed to gener ate an SRQ when setpoint tolerance is reached via bit 12 SPT of the Measurement Event Register See Status Structure page 7 1 for details Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Basic Operation 3 17 Setpoint tolerance operation Figure 3 2 demonstrates basic setpoint tolerance operation Operation begins at the Initial Setpoint where the temperature stabilizes at the programmed setpoint Once the setpoint has been changed either from the front panel or with a remote command the temperature gradually increases to the new setpoint as shown Once the temperature reaches the Set point
48. SCPI Command Reference 10 45 SOURce2 subsystem The SOURce 2 subsystem command is used to set the logic level of the digital output lines as summarized in Table 10 6 LEVel lt NRf gt lt NDN gt SOURce2 TTL LEVel lt NRf gt lt NDN gt Set digital output pattern Parameters lt NRf gt Oto15 Decimal format lt NDN gt Bx Binary format x 0000 to 1111 Hx Hexadecimal format x 0 to F Qx Octal format x 0 to 17 Query TTL Query digital output value Description This command is used to set the logic levels of the output lines of the Digital I O port When set high the specified output line will be at approximately 5V When set low the output line will be at OV The four output lines are internally pulled up to Vcc and are capable of sinking 500mA and sourcing 2mA These lines are also capable of switching external voltages as high as 33V Use the following table to determine the parameter value for the desired decimal digital output pattern OUT 4 OUT 3 OUT 2 OUT 1 Decimal value L L L L 0 L L L H 1 L L H L 2 L L H H 3 L H L L 4 L H L H 5 L H H L 6 L H H H 7 H L L L 8 H L L H 9 H L H L 10 H L H H 11 H H L L 12 H H L H 13 H H H L 14 H H H H 15 L Low Gnd H High 243V Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 46 SCPI Command Reference STATus subsystem Models 2510 and 2510 AT User s Manual
49. TEMP ATUN SYSTAU LONG command to allow for the very slow system response Initiate the autotune process by sending this command SOUR1 TEMP ATUN INIT Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual PID Control Concepts 4 13 9 Wait until the autotune process is complete The unit will display messages on the front panel to indicate autotune progress and it will generate an SRQ if pro grammed to do so see Section 7 To abort the autotune procedure you must cycle power 10 Oncethe autotune procedure is complete you can use the MSETtle or MOVershoot GAIN DERivative and INTegral queries to request the autotune gain derivative and integral constants for minimum settling or minimum overshoot as desired If you are satisfied with the results you can send the following commands to trans fer these tuning constants to the appropriate registers for usage e SOUR TEMP ATUN LCON MSET TRANS Accept and install MSET constants as defaults e SOUR TEMP ATUN LCON MOV TRANS Accept and install MOV con stants as defaults NOTE To retain these tuning constants after cycling power be sure to save them as power on defaults by using the SAVESETUP selection in the main MENU 11 Ifthe results are not exactly what you ideally want use the following manual PID loop constant commands to fine tune the system using the autotune values as a startin
50. Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com D IEEE 488 and SCPI Conformance Information Introduction eei e e ee see uo ERO de een rue D 2 E Example Programs Ihioniteito ME E 2 Program requirements sesseeeeeeeeerenee eee E 2 Computer hardware requirements eese E 2 Software requirements eesseesseeeeeeeneenne enne E 2 General program instructions eene E 2 Basic temperature control program seen E 3 Instrument setup esee nne eee E 3 Requested readings esee E 3 Setpoint tolerance temperature sweep essere E 4 OVerVIeW ate eei eee ee Oo et Nette Pep egats E 4 Enabling SRQ on setpoint tolerance E 5 Temperature sweep program summary eee E 5 Program 1 Basic temperature control essess E 6 Program 2 Setpoint tolerance temperature sweep E 8 F GPIB 488 1 Protocol Introd cti n M F 2 Selecting the 488 1 protocol 0 0 cesceesceseeeteeeseeeeeeeeseessneeenneees F 2 Protocol differences 1 everti crt t aris F 3 Message exchange protocol MEP sese F 3 Using SCPI based programs eee F 3 Bus Hold off 5 2 ertet rettet iere eti RE a F 4 Trigger on talk eeeseeeeeeeeseeeeeeeeee nennen enne F 4 Mess
51. and or perform various instrument operations as shown in Table 1 4 and in Figure 1 3 Use the Rules to navigate menus page 1 21 to check and or change Main Menu options Table 1 4 Main menu Menu item Description Parameters SAVESETUP Configure setup conditions SAVE Save present Model 2510 setup to memory location 0to4 RESTORE Return the Model 2510 to setup saved in memory 0to4 POWERON Select the power on default setup BENCH Powers on to BENCH defaults GPIB Powers on to GPIB defaults USER SETUP NUMBER Powers on to user setup 0to4 RESET Returns unit to BENCH or GPIB defaults COMMUNICATION Select and configure remote interface GPIB Select GPIB IEEE 488 Bus set primary address 0 to 30 Select SCPI or 488 1 protocol Appendix F Default 15 RS 232 Select the RS 232 interface set parameters 57600 38400 BAUD Select baud rate 19200 9600 4800 2400 1200 600 300 BITS Select number of data bits 7 or 8 PARITY Select parity NONE ODD EVEN TERMINATOR Select terminator CR CR LF LF or LF CR FLOW CTRL Select flow control NONE or XON XOFF Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 1 20 Getting Started Table 1 4 continued Models 2510 and 2510 AT User s Manual Main menu Menu item Description Parameters CAL Calibrate Model 2510 See Service Manual UNLOCK Unlock calibration EXECUTE Execute calibration steps VIE
52. and terminator should be acquired in one piece The header 0 can be read separately before the rest of the string The number of bytes to be transferred can be calculated as follows Bytes 2 Rdgs x 4 1 where 2 is the number of bytes for the header 0 Rdgs is the product of the number of selected data elements arm count and trigger count 4 is the number of bytes for each reading 1 is the byte for the terminator Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual SCPI Command Reference 10 21 Data elements ELEMents item list FORMat ELEMents item list Specify data elements for data string Parameters lt item list VOLTage Includes voltage reading CURRent Includes current reading POWer Includes power reading RESistance Includes resistance reading TEMPerature Includes temperature reading TSENsor Includes sensor reading TIME Includes timestamp STATus Includes status information NOTE Each item in the list must be separated by a comma i e ELEMents VOLTage CURRent RESistance Query Description ELEMents Query elements in data string This command is used to specify the elements to be included in the data string in response to the following queries FETCh READ MEASure lt function gt You can specify from one to all five elements Each element in the list must be separated by a comma T
53. associated information very carefully before per forming the indicated procedure The CAUTION heading used in this manual explains hazards that could damage the instrument Such damage may invalidate the warranty Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Getting Started 1 3 Inspection The Model 2510 was carefully inspected electrically and mechanically before shipment After unpacking all items from the shipping carton check for any obvious signs of physi cal damage that may have occurred during transit There may be a protective film over the display lens which can be removed Report any damage to the shipping agent immedi ately Save the original packing carton for possible future shipment The following items are included with every Model 2510 order e Model 2510 with line cord Mating input output connector Keithley part no CS 846 Accessories as ordered e Certificate of calibration e User s Manual If an additional manual is required order the appropriate manual package for example 2510 900 00 The manual packages include a manual and any pertinent addenda Options and accessories The following options and accessories are available from Keithley for use with the Model 2510 INPUT OUTPUT mating connector One mating connector for the rear panel INPUT OUTPUT connector is supplied Addi tional part number CS 846 con
54. attach any additional sheets as necessary Show a block diagram of your measurement including all instruments connected whether power is turned on or not Also describe signal source Where is the measurement being performed factory controlled laboratory out of doors etc What power line voltage is used Ambient temperature F Relative humidity Other Any additional information If special modifications have been made by the user please describe Be sure to include your name and phone number on this service form Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Specifications are subject to change without notice All Keithley trademarks and trade names are the property of Keithley Instruments Inc All other trademarks and trade names are the property of their respective companies KEITHLEY Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com
55. byte and service request SRQ esses 7 7 Stat s Dyte TePlster 1o rep rater rete ticis 7 8 Service request enable register eseeeeee 7 9 Serial polling and SRQ eee 7 9 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com SPE SPD serial polling eee 7 9 Status byte and service request commands 7 10 Programming example set MSS B6 when error occurs 7 10 Status register Sets 1 etaient nett Het tereti 7 11 Register bit descriptions sse 7 11 Standard event register sse 7 11 Operation event register eese 7 13 Measurement event register essen 7 14 Questionable event register eeeeeeeeees 7 16 Condition registers sess eene nennen 7 17 Event Teglstets y ieionee tee o E Eiin 7 17 Event enable registers eese 7 18 Programming example program and read register set sss 7 19 QUEUES MEC 7 19 QUUPUL QUES M 7 19 Btrof queue 5e oreet e rede REPE eere ig 7 20 Programming example read error queue 7 21 8 Common Commands Command summary s eesseeeseeeeeeeeee eene enne nnne enne oaeoi 8 2 Command teference rn ht interire te ener ele ne een 8 3 DN identification query
56. device The principle reason for this change in operational efficiency is that the PR heating generated by the normal operation of the Peltier junction adds to the effi ciency of the junction when pumping heat into the load but it subtracts from the efficiency of the junction when cooling the load This change in Peltier gain will cause the overall system characteristics and hence the tuning constants which will control it to change appreciably over the entire operating temperature range of the system It is for this reason that you should tune the PID loop at the actual system operating temperature Ideally if the temperature changes by more than 10 C you should create a new set of tuning con stants for proper control Large temperature steps If the temperature step is very large tune the PID loop at the highest temperature that will occur during normal operation This tuning method will ensure stability of the PID loop at the higher operating temperatures If you use these same tuning constants at the lower temperatures response at the lower temperatures will be slower due to the lower gain of the TEC If the loop is tuned at the lower temperatures to give a better response and these same tuning constants are used at the higher temperatures the PID loop may become unstable at the higher operating temperatures due to the higher gain of the TEC at these higher temperatures Averaging the constants from both extremes is not advisable as p
57. device under test may be at temperature extremes Improper use of the temperature controller may cause personal injury Allow suffi cient time for the device under test to return to a safe temperature after testing before making personal contact Use a heat sink or physical barriers as necessary to avoid contact WARNING The maximum common mode voltage is 30V DC Exceeding this value will result in a shock hazard because of the floating source CAUTION The maximum voltage between the INPUT OUTPUT S sense termi nals is 1V Difference between force and sense lines for both INPUT and OUTPUT terminals Exceeding this value may result in instru ment damage Operation overview Control characteristics The Model 2510 has the following basic control characteristics Control capabilities Control thermoelectric cooler TEC power to maintain constant temperature current voltage or thermistor resistance Output range 10V DC at up to 5A DC Setpoint range 50 C to 225 C Setpoint resolution 0 001 C Over temperature limit 250 C maximum Under temperature limit 50 C minimum Current limit 1A to 5 25A Measurement characteristics Basic Model 2510 measurement characteristics include Measurement functions AC resistance available only via remote DC resis tance operating voltage current and power and AC resistance Thermal feedback element types PT385 PT3916 PT100 D10 F100 R
58. drop all the letters after it Example display disp Ifthe command contains a question mark query or a non optional number included in the command word you must include it in the short form version Examples current curr window2 wind2 window 1 wind Command words or characters that are enclosed in brackets are optional and need not be included in the program message NOTE For fastest response to commands always use short forms Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 6 16 Remote Operations Models 2510 and 2510 AT User s Manual Program messages A program message is made up of one or more command words sent by the computer to the instrument Each common command is a three letter acronym preceded by an asterisk SCPI commands are categorized in the STATus subsystem and are used to explain how command words are structured to formulate program messages STATus Path Root OPERation Path ENABle lt NRf gt Command and parameter ENABlIe Query command PRESet Command Single command messages The above command structure has three levels The first level is made up of the root com mand STATus and serves as a path The second level is made up of another path OPERation and a command PRESet The third path is made up of one command for the OPERation path The three commands in this structure can be executed by sending three se
59. enable bit is set as programmed by the user the output summary of the register will set to 1 which in turn sets the summary bit of the Status Byte Register The commands to program and read the event enable registers are listed in Table 7 7 For details on programming and reading registers see Programming enable registers page 7 5 and Reading registers page 7 6 NOTE The bits of any enable register can be reset to 0 by sending the 0 parameter value with the appropriate enable command i e STATus OPERation ENABle 0 CLS has no effect on event enable registers Table 7 7 Event enable registers commands Command Description Default ESE lt NDN gt or lt NRf gt Program Standard Event Enable Register See Parameters Note ESE Read Standard Event Enable Register STATus STATus Subsystem OPERation Operation Event Enable Register ENABle lt NDN gt or lt NRf gt Program enable register See Parameters ENABle Read enable register MEASurement Measurement Event Enable Register ENABle lt NDN gt or lt NRf gt Program enable register See Parameters ENABle Read enable register QUEStionable Questionable Event Enable Register ENABle lt NDN gt or lt NRf gt Program enable register See Parameters ENABle Read Measurement Event Enable Register Parameters lt NDN gt Bxx x Binary format each x 1 or 0 Hx Hexadecimal format x 0 to FFFF Qx Oc
60. faster command response times Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Remote Operations 6 15 Leading colon The leading colon is not necessary and not using the leading colon will slightly increase response times Example FORM ELEM FORM ELEM NOTE The for common commands is always required Long form and short form versions A SCPI command word can be sent in its long form or short form version The command subsystem tables in Section 10 provide the long form version However the short form version is indicated by upper case characters Examples SYSTem PRESet long form SYST PRES short form SYSTem PRES long form and short form combination Note that each command word must be in long form or short form and not something in between For example SYSTe PRESe is illegal and will generate an error The command will not be executed Short form rules Use the following rules to determine the short form version of any SCPI command Ifthe length of the command word is four letters or less no short form version exists Example auto auto These rules apply to command words that exceed four letters Ifthe fourth letter of the command word is a vowel including y delete it and all the letters after it Example mmediate imm Ifthe fourth letter of the command word is a consonant retain it but
61. functions page 3 3 for parameter information Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 1 22 Getting Started Models 2510 and 2510 AT User s Manual Figure 1 3 Main menu tree Press MENU key Use and to select item then press ENTER SAVESETUP SAVE RESTORE POWERON BENCH GPIB USER SETUP NUMBER RESET COMMUNICATION GPIB RS 232 BAUD BITS PARITY TERMINATOR FLOW CTRL CAL UNLOCK EXECUTE VIEW DATES SAVE LOCK CHANGE PASSWORD TEST t DISPLAY TESTS KEYS DISPLAY PATTERNS CHAR SET A D CTRL L LINE FREQ 50Hz 60Hz ENERAL DIGOUT SERIAL TIMESTAMP NUMBERS Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Table 1 5 Getting Started 1 23 Temperature configuration menu Configuration menu item Description PROTECTION CONTROL LOLIM HILIM SENSOR TYPE THERMISTOR RANGE A B C I SRC SENSE MODE RTD TYPE RANGE I SRC SENSE MODE I SS OFFSET SCALE FACTOR V SS OFFSET SCALE FACTOR UNITS PID PROPORTIONAL INTEGRAL DERIVATIVE Configure temperature protection ENABLE or DISABLE temperature protection Program lower temperature limit Program higher temperature limit Select sensor type and settings Program thermistor settings Set thermistor range 100Q 1kQ 10kQ 100kQ Program A coefficie
62. is displayed instead of executed Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 16 SCPI Command Reference Models 2510 and 2510 AT User s Manual STATe lt b gt DISPlay WINDow 1 TEXT STATe lt b gt Control message top display DISPlay WINDow2 TEXT STATe lt b gt Control message bottom display Parameters lt b gt 0 or OFF Disable text message for specified display 1 or ON Enable text message for specified display Query STATe Query state of message mode for specified display Description These commands enable and disable the text message modes When enabled a defined message is displayed When disabled the message is removed from the display GPIB Operation A user defined text message remains displayed only as long as the instrument is in remote Taking the instrument out of remote by pressing the DISPLAY TOGGLE LOCAL key or sending LOCAL 15 cancels the message and disables the text message mode RS 232 Operation A user defined test message can be cancelled by sending the S YSTem LOCal command or pressing the LOCAL key Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual SCPI Command Reference 10 17 ASCII display values VAL DISPLAY VAL DISPLAY VAL DISPLAY 000 invalid 048 0 096 open quote 001 invalid 049 1 097 a 002 invalid 050 2 098 b 003 invalid
63. measurement Output Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Basic Operation Safety precautions Lists safety precautions that should be observed when using the unit Operation overview Summarizes the basic operating characteristics of the Model 2510 Configuring functions Provides step by step procedures for configuring the Model 2510 temperature voltage current and resistance functions Adjusting setpoints Provides basic information on adjusting setpoints and allowable setpoint ranges Basic front panel control measure procedure Describes the basic procedure for setting up unit control and measurement operating modes and using the unit from the front panel Basic remote control measure procedure Describes the basic procedure for setting up unit control and measurement operating modes and using the unit using remote commands Protection limits Discusses the protection limits for the various functions Setpoint tolerances Details using the setpoint tolerance to determine when the control setting is within the desired setpoint window Temperature sensors Covers various aspects of temperature sensors Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 3 2 Basic Operation Models 2510 and 2510 AT User s Manual Safety precautions WARNING The
64. must be terminated with an LF line feed EOI end or identify or an LF EOI The bus will hang if your computer does not provide this termination The following example shows how a multiple command program message must be terminated sour curr 1 sour volt5 lt PMT gt Command execution rules Commands execute in the order that they are presented in the program message Aninvalid command generates an error and of course is not executed Valid commands that precede an invalid command in a multiple command program message are executed Valid commands that follow an invalid command in a multiple command program message are ignored Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 6 18 Remote Operations Models 2510 and 2510 AT User s Manual Response messages A response message is the message sent by the instrument to the computer in response to a query command program message Sending a response message After sending a query command the response message is placed in the Output Queue When the Model 2510 is then addressed to talk the response message is sent from the Output Queue to the computer Multiple response messages If you send more than one query command in the same program message see Multiple command messages page 6 16 the multiple response messages for all the queries are sent to the computer when the Model 2510 is addressed to talk The responses are
65. overshoot occurs at 26 495 seconds with a peak value of 27 450 C It settles to within 0 1 of the final temperature 026 C in 149 1 seconds In the minimum overshoot case the temperature overshoot occurs at 20 847 seconds with a peak value of 26 226 C It settles to within 0 1 of the final temperature 25 974 C at 521 914 seconds See Table 4 2 Table 4 2 Response time comparison example 2 Lag Time 11 0sec Tau Time 107 0sec Condition Minimum Settling Time Minimum Overshoot Max Overshoot 27 450 C 26 495 Sec after Step 26 226 C 20 847 Sec after Step Settle to 0 196 26 025 C 149 100 Sec after Step 25 974 C 521 914 Sec after Step Clearly the minimum settling time option settles much more quickly to 0 196 than does the minimum overshoot version Figure 4 5 Response comparison example 2 long Lag and Tau times Minimum Settling Time Minimum Overshoot 200 200 Time Sec Time Sec Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual PID Control Concepts 4 9 Autotune limitations The Model 2510 AT autotune algorithm assumes that the system response to a step func tion in the TEC voltage is an exponential temperature rise of the form T T system initial for t lt tag eu p Tao l e T T system initia for t2 tlag This relationship is depicted graphically in Figure 4 6 Fi
66. reset the input parser When receiving data all data up to and including the terminator LF with EOD must be accepted Otherwise a DCL or IFC must be sent to reset the output task Empty command strings terminator only should not be sent Using SCPI based programs In general an existing SCPI based program will run properly and faster in the 488 1 pro tocol as long as it meets the above guidelines and limitations Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com F 4 GPIB 488 1 Protocol Models 2510 and 2510 AT User s Manual Bus hold off OPC OPC and WAI are still functional but are not needed for the 488 1 protocol When sending commands the GPIB is automatically held off when it detects a terminator The hold off is released when all the commands have finished executing or if there is some parser or command error An exception is an initiate command which releases the hold off immediately and does not wait for all of the readings to be acquired This imme diate release of bus hold off is done to support GET SDC IFC TRG RCL RST SYSTem PRESet and ABORt during data acquisition Trigger on talk Trigger on talk functionality has been added for the 488 1 protocol If a query has not been received by the instrument the SourceMeter will automatically assume a READ command has been sent when it is addressed to talk This technique increases GPIB speed by decrea
67. sent in the order the query commands were sent and are separated by semicolons Items within the same query are separated by commas The following example shows the response message for a program message that contains four single item query commands 0 1 1 0 Response message terminator RMT Each response is terminated with an LF line feed and EOI end or identify The follow ing example shows how a multiple response message is terminated 0 1 1 0 lt RMT gt Message exchange protocol Two rules summarize the message exchange protocol Rule 1 You must always tell the Model 2510 what to send to the computer The following two steps must always be performed to send information from the instru ment to the computer 1 Send the appropriate query command s in a program message 2 Address the Model 2510 to talk Rule 2 The complete response message must be received by the computer before another program message can be sent to the Model 2510 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Status Structure e Overview Provides an operational overview of the status structure for the Model 2510 Clearing registers and queues Covers the actions that clear reset registers and queues Programming and reading registers Explains how to program enable registers and read any register in the status structure Status byte and service request
68. simplify the task of keeping track of the devices a unique address number is assigned to each one On the bus only one device can talk at a time and is addressed to talk by the controller The device that is talking is known as the active talker The devices that need to listen to the talker are addressed to listen by the controller Each listener is then referred to as an active listener Devices that do not need to listen are instructed to unlisten The reason for the unlisten instruction is to optimize the speed of bus information transfer since the task of listening takes up bus time Through the use of control lines a handshake sequence takes place in the transfer process of information from a talker to a listener This handshake sequence helps ensure the credi bility of the information transfer The basic handshake sequence between an active con troller talker and a listener is as follows 1 The listener indicates that it is ready to listen 2 The talker places the byte of data on the bus and indicates that the data is available to the listener 3 The listener aware that the data is available accepts the data and then indicates that the data has been accepted 4 The talker aware that the data has been accepted stops sending data and indicates that data is not being sent 5 The listener aware that there is no data on the bus indicates that it is ready for the next byte of data Bus description The IEEE 488 bus w
69. standard 19 inch rack Carrying case Model 1050 padded carrying case A carrying case for a Model 2510 Includes handles and a shoulder strap Product overview The Model 2510 and 2510 AT TEC SourceMeters have the following operating characteristics Thermoelectric cooler source range 10V DC at up to 5A DC Temperature voltage current and resistance control functions Software controlled PID loop PID autotuning Model 2510 AT only 100 and 10000 RTD sensor ranges Several measurement functions including operating resistance voltage current and power as well as AC resistance Compatible with RTD thermistor and solid state thermal feedback elements Built in IEEE 488 and RS 2322 interfaces for remote operation Output enable circuit to automatically remove source signal when a test fixture lid is open Digital I O port allows control of other instruments e Closed cover calibration The instrument can be calibrated either from the front panel or remote interface Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Front and rear panel familiarization Front panel summary The front panel of the Model 2510 is shown in Figure 1 1 The following abbreviated Getting Started 1 5 information should be reviewed before operating the instrument See Section 3 for more detailed information Fig
70. switching cards or making internal changes such as installing or removing jumpers Do not touch any object that could provide a current path to the common side of the circuit under test or power line earth ground Al ways make measurements with dry hands while standing on a dry insulated surface capable of withstanding the voltage being measured The instrument and accessories must be used in accordance with its specifications and operating instructions or the safety of the equipment may be impaired Do not exceed the maximum signal levels of the instruments and accessories as defined in the specifications and operating in formation and as shown on the instrument or test fixture panels or switching card When fuses are used in a product replace with same type and rating for continued protection against fire hazard Chassis connections must only be used as shield connections for measuring circuits NOT as safety earth ground connections If you are using a test fixture keep the lid closed while power is applied to the device under test Safe operation requires the use of a lid interlock Ifa screw is present connect it to safety earth ground using the wire recommended in the user documentation The dX symbol on an instrument indicates that the user should refer to the operating instructions located in the manual The A symbol on an instrument shows that it can source or measure 1000 volts or more including the combined effect of no
71. taken and processed Bit B7 Reading Overflow ROF Set bit indicates that the reading exceeds the selected measurement range of the Model 2510 Bits B8 through B10 Not used Bit B11 Output Enable OE Set bit indicates that the Digital I O port output enable line is asserted Bit B12 Setpoint Tolerance SPT Set bit indicates that the setpoint is within the programmed tolerance for the required number of readings Bit B13 Open Lead OL Set bit indicates that the temperature sensor leads are open Bit B14 Shorted Lead SL Set bit indicates that the temperature sensor leads are shorted Bit B15 Always zero Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Status Structure 7 15 Figure 7 6 Measurement event status stat meas cond SL OL SPT OE ROF RAV UR OR CO OV UT OT Measurement B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 BO Condition Register y y y v v y v v v v v y stat meas r SL OL SPT OE pem ROF RAV UR OR CO OV UT OT Measurement Event B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 BO Register A OR d To
72. the four functions are discussed below Table 3 8 summarizes protec tion limit characteristics NOTE For temperature and resistance the upper limit cannot be set below the lower limit and the lower limit cannot be set above the upper limit Also the setpoint cannot exceed limit setting s Table 3 8 Protection limit characteristics Output Function Limit range Inhibited Display message Temperature Lower limit 50 to 250 C Yes UNDER TEMP Upper limit 50 to 250 C Yes OVER TEMP Voltage 0 5 to 10 5V No VLIM Current 1 0 to 5 25A No ILIM Resistance Lower limit Yes UNDER OHMS 1Q to 200Q 100 RTD or thermistor 5Q to 2kQ 1kQ RTD or thermistor 50 to 20kQ 10kQ thermistor 500Q to 200kQ 100kQ thermistor Upper limit Yes OVER OHMS 50Q to 1kQ 100Q thermistor 500Q to 9 999kQ 1kQ thermistor 5kQ to 80kQ 10kQ thermistor 50kQ to 200kQ 100kQ thermistor 50 to 250Q 100Q RTD 500Q to 3kQ 1kQ RTD Yes indicates that output turns off if limit is exceeded and cannot be turned on when in limit Lower limit cannot be set above upper limit Upper limit cannot be set below lower limit Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 3 14 Basic Operation Models 2510 and 2510 AT User s Manual Temperature protection limits The upper and lower temperature limits have a valid range of 50 to 250 C If the lower limit is exceeded UND
73. until the system is just oscillating Note the period of oscillation then reduce the gain by 3096 Note however that if you adjust for maximum power control effort limit and tune for that setting specific PID parameters will result If you use those same PID values for a different limit the system may respond differently 3 Suddenly decreasing or increasing Tg by about 5 should induce underdamped oscillations Try several Derivative values and choose a value that gives a critically damped response Typically D will be about one third of the oscillation period obtained in step 2 above Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 4 6 PID Control Concepts Models 2510 and 2510 AT User s Manual 4 Slowly increase the Integral T value until oscillation just begins then reduce this level by a factor of two or three This reduction should be enough to stop the oscil lation Use the lowest I value that gives adequate performance 5 Check that the overall temperature control characteristics of the Model 2510 using these settings is satisfactory under the conditions it will be used PID autotune Model 2510 AT only The Model 2510 AT autotune algorithm provides the user with a tool to help in tuning the Model 2510 AT Temperature PID loop It is intended to give a set of PID tuning parame ters that will give close to the optimum system performance but it may not result in ideal
74. using the binary format which directly indicates which bits are set The command to select format FORMat SREGister is documented in Table 7 2 To determine the exact nature of the error you will have to read the Error Queue see Queues page 7 19 Table 7 4 Status byte programming example Command Description CLS Clear Error Queue SRE 4 Enable EAV FORM SREG BIN Select binary format XYZ Generate error STB Read Status Byte Register Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Status Structure 7 11 Status register sets As shown in Figure 7 1 there are four status register sets in the status structure of the Model 2510 Standard Event Status Operation Event Status Measurement Event Status and Questionable Event Status NOTE See Appendix B for details on which register bits are set by specific status and error conditions Register bit descriptions Standard event register The used bits of the Standard Event Register shown in Figure 7 4 are described as fol lows Bit BO Operation Complete Set bit indicates that all pending selected device operations are completed and the Model 2510 is ready to accept new commands This bit only sets in response to the OPC query command See Section 8 Com mon Commands for details on OPC and OPC Bit B1 Not used Bit B2 Query Error QYE
75. 0 parameter value with ESE to reset all bits of that enable register to 0 see Status byte and service request SRQ page 7 7 2 STATus PRESet has no effect on the Error Queue 3 Use either of the two clear commands to clear the Error Queue Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Status Structure 7 5 Programming and reading registers Programming enable registers The only registers that can be programmed by the user are the enable registers All other registers in the status structure are read only registers The following explains how to ascertain the parameter values for the various commands used to program enable registers The actual commands are covered later in this section see Table 7 3 and Table 7 6 A command to program an event enable register is sent with a parameter value that deter mines the desired state 0 or 1 of each bit in the appropriate register An enable register can be programmed using any of the following data formats for the parameter value binary decimal hexadecimal or octal The bit positions of the register see Figure 7 2 indicate the binary parameter value For example if you wish to sets bits B4 B3 and B1 the binary value would be 11010 where B4 1 B3 1 B1 1 and all other bits are 0 When you use one of the other formats con vert the binary number to its decimal hexadecimal or oct
76. 01V I SS Temp lt 50 C Temp gt 250 C Solid state sensor restrictions I SS and V SS temperature sensors cannot be selected with the resistance function active The resistance function is intended for use only with thermistor and RTD sensors Thermistor sensor ranges Available thermistor sensor ranges are 100Q 1kQ 10kQ and 100kQ For optimum accu racy use the appropriate range for your sensor The Model 2510 will display URR Under Resistance Range or ORR Over Resistance Range if the sensor resistance is outside the optimum range RTD sensor ranges Available RTD sensor ranges are 100Q and 1000Q Use the appropriate range for your sensor to optimize accuracy Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com PID Control Concepts Temperature control model Briefly covers the model for temperature control Temperature control methods Briefly covers various methods used for temper ature control including on off proportional proportional derivative and propor tional integral derivative PID tuning Provides a basic step by step procedure for tuning the PID loop for optimum operation PID autotune Details using the Model 2510 AT autotune feature Sensor coefficients Covers thermistor and RTD temperature coefficients Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com
77. 051 3 099 c 004 invalid 052 4 100 d 005 invalid 053 5 101 e 006 invalid 054 6 102 f 007 invalid 055 7 103 g 008 invalid 056 8 104 h 009 invalid 057 9 105 i 010 invalid 058 106 j 011 invalid 059 107 k 012 invalid 060 lt 108 1 013 invalid 061 109 m 014 invalid 062 gt 110 n 015 invalid 063 111 o 016 p 064 112 p 017 065 A 113 q 018 W 066 B 114 r 019 x 067 C 115 s 020 leftflagbar 068 D 116 t 021 rightflagbar 069 E 117 u 022 fullflagbar 070 F 118 v 023 leftbar 071 G 119 w 024 rightbar 072 H 120 x 025 fullflagbar 073 I 121 y 026 074 J 122 Z 027 075 K 123 028 076 L 124 029 077 M 125 030 selftest1 078 N 126 031 selftest2 079 O 127 box 032 space 080 P 128 space 033 081 Q 129 dotl 034 082 R 130 dot2 035 083 S 131 dot12 036 084 T 132 dot3 037 085 U 133 dot13 038 amp 086 V 134 dot23 039 apostrophe 087 W 135 dot123 040 088 X 136 dot4 041 089 Y 137 dotl4 042 090 Z 138 dot24 043 091 139 dot124 044 comma 092 140 dot34 045 093 141 dot134 046 094 o 142 dot234 047 095 143 dot1234 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 18 SCPI Command Reference Models 2510 and 2510 AT User s Manual 144 selftest3 192 2 240 y 145 selftest4 193 241 lightning 146 selftest5 194 242 KI 147 selftest6 195 243 box3 148 selftest7 196 co 244 box4 149 selftest8 197 245 box5 150 selftest9 198 246 box6 151 selftest10
78. 10 AT User s Manual Introduction This Appendix contains a summary of status and error messages which status register bits are set when messages occur and methods to avoid or eliminate most common SCPI errors Status and error messages Table B 1 summarizes status and error messages which are stored in the Error Queue Each message is preceded by a code number Negative numbers are used for SCPI defined messages and positive numbers are used for Keithley defined messages Note that error and status conditions will also set specific bits in various status registers as sum marized in Table B 1 Section 7 has detailed information on registers and queues Briefly you can use the fol lowing queries to obtain error and status information e SYST ERR reads Error Queue e ESR reads Standard Event Status Register e STAT OPER reads Operation Event Register STAT MEAS reads Measurement Event Register STAT QUES reads Questionable Event Register NOTE SCPI confirmed messages are described in volume 2 Command Reference of the Standard Commands for Programmable Instruments Refer to the SYSTem ERRor command Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Status and Error Messages Table B 1 Status and error messages Number Error message Event Status register Bit 440 Query UNTERM
79. 1100 Binary format lt NDN gt parameter type h2C Hexadecimal format lt NDN gt parameter type q54 Octal format lt NDN gt parameter type 44 Decimal format lt NRf gt parameter type Valid characters for the non decimal parameter values are shown as follows lt NDN gt format Valid characters Binary 1s and Os Hexadecimal 0 through 9 and A through F Octal 0 through 7 Reading registers Any register in the status structure can be read by using the appropriate query com mand The following explains how to interpret the returned value response message The actual query commands are covered later in this section The response message will be a value that indicates which bits in the register are set That value if not already binary will have to be converted to its binary equivalent For exam ple for a binary value of 100101 bits B5 B2 and BO are set The returned value can be in the binary decimal hexadecimal or octal format The FORMat SREGister command is used to select the data format for the returned value see Table 7 2 For non decimal formats one of the following headers will accompany the returned value to indicate which format is selected B Header for binary values H Header for hexadecimal values Q Header for octal values Table 7 2 Data format commands for reading status registers Command Description Default FORMat SREGister lt name gt Select data format for rea
80. 15 MEAS POW Query TEC power PRINT H1 ENTER 15 INPUT 2 R PRINT TEC power R PRINT 1 OUTPUT 15 MEAS CURR Query TEC current PRINT H1 ENTER 15 INPUT 2 R PRINT TEC current R PRINT 1 OUTPUT 15 MEAS TEMP Query temperature PRINT H1 ENTER 15 INPUT 2 R PRINT Temperature R PRINT 1 OUTPUT 15 MEAS RES Query TEC DC resistance PRINT H1 ENTER 15 INPUT 2 R PRINT TEC DC resistance R PRINT 1 OUTPUT 15 MEAS VOLT Query TEC voltage PRINT H1 ENTER 15 INPUT 2 R PRINT TEC voltage R V Step 8 Turn off output PRINT 1 OUTPUT 15 OUTP OFF PRINT Done Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com E 8 Example Programs Models 2510 and 2510 AT User s Manual Program 2 Setpoint tolerance temperature sweep The program uses setpoint tolerance to generate a temperature sweep 2510 primary address FOR OUTPUT AS 1 FOR INPUT AS 2 15 OPEN IEEE OPEN IEEE PRINT 1 INTERM CRLF PRINT 1 OUTTERM LF PRINT 1 REMOTE 15 PRINT 1 OUTPUT 15 PRINT 1 OUTPUT 15 PRINT 1 OUTPUT 15 PRINT 1 OUTPUT 15 PRINT 1 OUTPUT 15 PRINT 1 OUTPUT 15 CLS FOR Setpoint 40 TO PRINT 1 OUTPUT 15 PRINT Waiting for DO PRINT 1 SRO INPUT 2 S LOOP UNTIL S PRINT 1 OUTPUT 15 PRINT 1 SPOLL 15 INPUT 2
81. 3 114 Shorted Lead Se Measurement Event 14 Standard events 200 Operation complete SE Standard Event 0 Operation events 300 Device calibrating SE Operation Event 0 303 Device sweeping SE Operation Event 3 305 Waiting in trigger layer SE Operation Event 5 306 Waiting in arm layer SE Operation Event 6 307 Autotune algorithm finished SE Operation Event 7 310 Entering idle layer SE Operation Event 10 Questionable events 408 Questionable Calibration SE Questionable Event 8 414 Command Warning SE Questionable Event 14 Calibration errors 500 Date of calibration not set EE Standard Event 3 501 Next date of calibration not set EE Standard Event 3 502 Calibration data invalid EE Standard Event 3 509 Not permitted with cal locked EE Standard Event 3 510 Not permitted with cal un locked EE Standard Event 3 520 Source gain data invalid EE Standard Event 3 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com B 5 B 6 Status and Error Messages Models 2510 and 2510 AT User s Manual Table B 1 continued Status and error messages Number Error message Event Status register Bit 522 Source gain data invalid EE Standard Event 3 4 523 Source offset data invalid EE Standard Event 3 524 Source DAC Overflow EE Standard Event 3 4525 Source DAC Underflow EE Standard Event 3 530 IProtecton gain data invali
82. 488 bus follow these steps 1 Line up the cable connector with the connector located on the rear panel The con nector is designed so it will fit only one way Figure 6 3 shows the location of the IEEE 488 connector Tighten the screws securely making sure not to overtighten them 3 Connect any additional connectors from other instruments as required for your application 4 Make sure the other end of the cable is properly connected to the controller Most controllers are equipped with an IEEE 488 style connector but a few may require a different type of connecting cable See your controller s instruction manual for information about properly connecting to the IEEE 488 bus NOTE You can only have 15 devices connected to an IEEE 488 bus including the con troller The maximum cable length is either 20 meters or two meters multiplied by the number of devices whichever is less Not observing these limits may cause erratic bus operation Figure 6 3 IEEE 488 and RS 232 connector locations RS 232 IEEE 488 Connector Connector on A OUTPUT INPUT RAN s s r res s ISOLATION FROM EARTH 30V MAX e 2 WW IEEE 488 ENTER IEEE ADDRESS WITH FRONT PANEVMENU Need d r TRIGGER ME LINK e INE FUSE SM 5A Ed A LINE RATING 100 240VAC ERIA Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 6 6 Remote Operations Models 2510
83. 6 0 10 KQ Excitation Accuracy 12 996 Nominal Sensor Temperature Range Sensor Coefficients Measurement Accuracy rdg offset 50 to 250 C o p 50 to 250 C 50 to 250 C o B 8 A B C 50 to 250 C A B C 0 04 0 07 Q 0 04 0 4Q 0 04 0 07 91 0 001404 Q THERMISTOR MEASUREMENT ACCURACY Thermistor 10kQ 100 pA 0 80 kQ 12 996 50 to 250 C A B C 0 02 3 Q 100 kQ 33 pA 833 uA max 0 200 kQ 32 996 50 to 250 C A B C 0 04 21 Q OPEN SHORTED ELEMENT DETECTION SOFTWARE LINEARIZATION FOR THERMISTOR AND RTD COMMON MODE VOLTAGE 30VDC COMMON MODE ISOLATION gt 10 Q lt 1000pF Nominal Thermistor Accuracy vs Temperature Resistance 0 C 25 C 50 C 100 C 100 Q 0 021 C 0 035 C 0 070 C 0 27 C 1kQ 0 015 C 0 023 C 0 045 C 0 18 C 10kQ 0 006 C 0 012 C 0 026 C 0 15 C 100 kQ 0 009 C 0 014 C 0 026 C 0 13 C SENSE INPUT IMPEDANCE gt 1 10 Q GENERAL NOISE REJECTION SPEED NPLC Normal 1 00 CMRR 90 dB SOURCE OUTPUT MODES Fixed DC level PROGRAMMABILITY IEEE 488 SCPI 1995 0 RS 232 3 user definable power up states plus factory default and RST POWER SUPPLY Nominal 100 to 240VAC rms 50 60Hz 90VA WARRANTY 1 year EMC Conforms to European Union Directive 89 336 EEC EN 61326 1 SAFETY Conforms to European Union Directive 73 23 EEC EN 61010 1 VIBRATION MIL PRF 28800F Class 3 Random Vibration WARM UP 1 hou
84. 6 TestEquipmentDepot com Manual Print History The print history shown below lists the printing dates of all Revisions and Addenda created for this manual The Revision Level letter increases alphabetically as the manual undergoes sub sequent updates Addenda which are released between Revisions contain important change in formation that the user should incorporate immediately into the manual Addenda are numbered sequentially When a new Revision is created all Addenda associated with the previous Revision of the manual are incorporated into the new Revision of the manual Each new Revision includes a revised copy of this print history page Revision A Document Number 2510 900 01 essere Revision Al Document Number 2510 900 01 essent Revision B Document Number 2510 900 01 December 2000 Revision C Document Number 2510 900 01 sese Revision D Document Number 2510 900 01 essent Revision E Document Number 2510 900 01 esses All Keithley product names are trademarks or registered trademarks of Keithley Instruments Inc Other brand names are trademarks or registered trademarks of their respective holders February 2002 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com KERESI Safety Precautions The following safety precautions should be observed before using this product and any assoc
85. 705 1 oo l Where Ry Resistance at temperature T C Ro Resistance at temperature 0 C amp Temperature coefficient at 0 C typically 0 003929 C 5 1 49 typical for 0 00392 platinum RTD B 0 for T gt 0 0 11 typical for T lt 0 These coefficients should be set to values specified by the RTD manufacturer See Configuring temperature page 3 3 for programming details Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Digital VO Port and Output Enable Digital I O port Details Digital I O port configuration connections and setting I O port operating parameters Output enable line Discusses output enable line operation and describes how to activate the line Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 5 2 Digital I O Port and Output Enable Models 2510 and 2510 AT User s Manual Digital I O port The Model 2510 has a digital input output port that can be used to control external digital circuitry and for a test fixture output enable circuit Port configuration The Digital I O Port ENABLE DIG I O connector is located on the rear panel and is shown in Figure 5 1 Note that a standard male DB 9 connector is used Figure 5 1 Digital I O port 1 5 eoeeee eeee 6 9 1 Digital Output 1 2 Digital Output 2 3 Digital Output 3 4 Digital Output 4 5 Ground
86. ABLE DIO 1 8 DATA TO TALK 8 LINES Dav NRFD HANDSHAKE NDAC IFC ATN BUS SRQ MANAGEMENT REN EOI Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com C 4 IEEE 488 Bus Overview Models 2510 and 2510 AT User s Manual There are two categories of controllers system controller and basic controller Both are able to control other instruments but only the system controller has the absolute authority in the system In a system with more than one controller only one controller may be active at any given time Certain protocol is used to pass control from one controller to another The IEEE 488 bus is limited to 15 devices including the controller Thus any number of talkers and listeners up to that limit may be present on the bus at one time Although sev eral devices may be commanded to listen simultaneously the bus can have only one active talker or communications would be scrambled A device is placed in the talk or listen state by sending an appropriate talk or listen com mand These talk and listen commands are derived from an instrument s primary address The primary address may have any value between 0 and 31 and is generally set by rear panel DIP switches or programmed from the front panel of the instrument The actual lis ten address value sent out over the bus is obtained by ORing the primary address with H20 For example if the primary address is H16 the actual liste
87. ADVISE Nd i I Enable l pin 8 i 1 Enable i 1 Digital I O I i i GND 1 1 pin 5 or 9 1 l 1 l 1 Digital I O Port and Output Enable 5 7 Test Fixture Fixture Switch Lid Closed Fixture Switch Lid Open B 2510 OUTPUT turns off and cannot be re enabled until closed again Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Remote Operations Differences remote vs local operation Summarizes remote operation enhancements and local to remote and remote to local transitions Selecting an interface Describes how to select between the GPIB and RS 232 interfaces GPIB operation Covers GPIB bus standards bus connections and primary address selection e RS 232 interface operation Outlines use of the RS 232 interface to control the Model 2510 via remote Front panel GPIB operation Summarizes GPIB error messages status indica tors and using the LOCAL key General bus commands Describes general bus commands used for fundamen tal GPIB control Programming syntax Describes the basic programming syntax for both com mon commands Section 8 and SCPI commands Section 10 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 6 2 Remote Operations Models 2510 and 2510 AT User s Manual Differences remote vs local operation Local to remote transition
88. ALK talk LSTN listen and SRQ service request annunciators show the GPIB bus status Each of these indicators is described below REM This indicator shows when the instrument is in the remote state REM does not necessarily indicate the state of the bus REN line as the instrument must be addressed to listen with REN true before the REM indicator turns on When the instrument is in remote all front panel keys except for the DISPLAY TOGGLE LOCAL key are locked out When REM is turned off the instrument is in the local state and front panel operation is restored NOTE IfLLO Local LockOut is in effect LOCAL will be locked out OUTPUT OFF is still operational in remote Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 6 10 Remote Operations Models 2510 and 2510 AT User s Manual TALK This indicator is on when the instrument is in the talker active state Place the unit in the talk state by addressing it to talk with the correct MTA My Talk Address command TALK is off when the unit is in the talker idle state Place the unit in the talker idle state by sending an UNT Untalk command addressing it to listen or sending the IFC Interface Clear command LSTN This indicator is on when the Model 2510 is in the listener active state which is activated by addressing the instrument to listen with the correct MLA My Listen Address com mand LSTN is off when the unit is in t
89. E FOR INPUT AS 2 INTERM CRLF OUTTERM LF REMOTE 15 Restore defaults OUTPUT 15 RST Select function OUTPUT 15 SOUR FUNC TEMP Configure selected function OUTPUT 15 UNIT TEMP CEL OUTPUT 15 SOUR TEMP PROT 100 OUTPUT 15 SOUR TEMP PROT LOW 10 OUTPUT 15 TEMP TRAN RTD OUTPUT 15 TEMP RTD TYPE PT100 OUTPUT 15 TEMP CURR AUTO ON OUTPUT 15 SYST RSEN ON OUTPUT 15 SOUR TEMP LCON 10 OUTPUT 15 SOUR TEMP LCON INT 0 5 OUTPUT 15 SOUR TEMP LCON DER 0 Program setpoint OUTPUT 15 SOUR TEMP 50 Program current limit OUTPUT 15 SENS CURR PROT MAX Turn on output OUTPUT 15 OUTP ON procedure Open IEEE 488 output path Open IEEE 488 input path Set input terminator Set output terminator Put 2510 in remote Restore GPIB defaults Select temperature function Celsius temperature units Upper limit 100 deg Lower limit 10 deg Select RTD sensor type Select PT100 RTD sensor Use default RTD sensor current Enable 4 wire sensing Gain P constant 10 Integral I constant 0 5 Derivative D constant 0 Setpoint 50 deg C Current limit 5 25A Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Example Programs E 7 Step 7 Request readings CLS PRINT Waiting 30 seconds for TEC to stabilize SLEEP 30 PRINT 1 OUTPUT
90. ER TEMP will be displayed on the front panel and Bit 1 UT of the Measurement Event Register will be set If the upper limit is exceeded OVER TEMP will be displayed on the front panel and Bit O OT of the Measurement Event Register will be set You can program the unit to generate an SRQ if either limit is exceeded see Section 7 Note that OUTPUT ON OFF is inhibited by exceeding either limit The output will turn off if either limit is exceeded and you cannot turn on the output with under or over limit conditions To program the temperature limits press CONFIG then T then select PROTECTION and program the limits as required See Configuring temperature page 3 3 for details Voltage protection limit The voltage limit has a valid range of 0 5 to 10 5V and the default value is 10 5 If the voltage limit is exceeded VLIM EXCEEDED will be displayed on the front panel Bit 2 OV of the Measurement Event Register will be set and you can program the unit to gen erate an SRQ if the voltage limit is exceeded Note that OUTPUT ON OFF is not inhibited by exceeding the voltage limit To program the voltage limit press CONFIG then V then select PROTECTION and pro gram the limit as required See Configuring voltage page 3 5 for details Current protection limit The current limit has a valid range of 1 0A to 5 25A and the default value is 2 0 If the current limit is exceeded ILIM will be displayed on the front panel
91. GET Group Execute Trigger The GET command is used to trigger devices to per form a specific action that depends on device configuration for example take a reading Although GET is an addressed command many devices respond to GET without addressing Address commands Addressed commands include two primary command groups and a secondary address group ATN is true when these commands are asserted The commands include LAG Listen Address Group These listen commands are derived from an instru ment s primary address and are used to address devices to listen The actual command byte is obtained by ORing the primary address with H20 TAG Talk Address Group The talk commands are derived from the primary address by ORing the address with H40 Talk commands are used to address devices to talk SCG Secondary Command Group Commands in this group provide additional addressing capabilities Many devices including the Model 2510 do not use these commands Unaddress commands The two unaddress commands are used by the controller to remove any talkers or listeners from the bus ATN is true when these commands are asserted UNL Unlisten Listeners are placed in the listener idle state by the UNL command UNT Untalk Any previously commanded talkers will be placed in the talker idle state by the UNT command Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com C
92. INATED after EE Standard Event 2 indefinite response 430 Query DEADLOCKED EE Standard Event 2 420 Query UNTERMINATED EE Standard Event 2 410 Query INTERRUPTED EE Standard Event 2 363 Input buffer overrun EE Standard Event 3 362 Framing error in program message EE Standard Event 3 361 Parity error in program message EE Standard Event 3 360 Communications error EE Standard Event 3 350 Queue overflow SYS Standard Event 3 330 Self test failed EE Standard Event 3 314 Save recall memory lost EE Standard Event 3 315 Configuration memory lost EE Standard Event 3 285 Program syntax error EE Standard Event 4 284 Program currently running EE Standard Event 4 282 Illegal program name EE Standard Event 4 281 Cannot create program EE Standard Event 4 260 Expression error EE Standard Event 4 241 Hardware missing EE Standard Event 4 230 Data corrupt or stale EE Standard Event 4 225 Out of memory EE Standard Event 4 224 Illegal parameter value EE Standard Event 4 223 Too much data EE Standard Event 4 222 Parameter data out of range EE Standard Event 4 221 Settings conflict EE Standard Event 4 220 Parameter error EE Standard Event 4 215 Arm deadlock EE Standard Event 4 214 Trigger deadlock EE Standard Event 4 213 Init ignored EE Standard Event 4 212 Arm ignored EE Standard Event 4 211 Trigger ignored EE Standard Event 4
93. Manual Bit Name Description NDAMA VOLTAGE_OFLO CURRENT_OFLO PID_BIT_A PID_BIT_B REMOTE_SENSE GND_CONNECT OPEN_LEAD SHORTED_LEAD This bit is set to 1 when the voltage measurement was made in an over range condition Cleared to 0 otherwise This bit is set to 1 when the current measurement was made in an over range condition Cleared to 0 otherwise Encoded PID function enabled bit Encoded PID function enabled bit Measure PID bit encoding BitB BitA Description 0 0 Voltage Active 0 1 Current Active 1 0 Temperature Active 1 1 Resistance Active 1 if in 4 Wire Mode 0 if 2 Wire 1 Connected 0 Disconnected Set if open sensor lead condition exists Set if shorted sensor lead condition exists Open lead and shorted lead conditions will be flagged under the follow ing conditions Sensor Open lead Shorted lead Thermistor Temp 50 C Temp gt 250 C RTD Temp gt 250 C Temp lt 50 C V SS Temp lt 50 C 0 001V to 0 001V I SS Temp 50 C Temp gt 250 C SSOURce2 lt name gt FORMat SOURce2 lt name gt Set SOUR2 and TTL response formats Parameters name ASCii ASCII format HEXadecimal Hexadecimal format OCTal Octal format BINary Binary format Query SOURce2 Query response format Description This command controls the response format for all SOUR2 TTL queries in a manner similar to formats set by the FORM SREG command See SOURce 2
94. Measurement Summary Bit MSB of Status Byte Register See Figure 7 1 MAMMA stat meas enab lt NRF gt SL OL SPT OF ROF RAV UR OR CO OV UT OT Measurement Event stat meas enab B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 BO Enable Register OT Over Temperature RAV Reading Available amp Logical AND UT Under Temperature ROF Reading Overflow OR Logical OR OV Over Voltage OE Output Enable Asserted CO Current Overload SPT Setpoint Tolerance OR Over Resistance OL Open Lead UR Under Resistance SL Shorted Lead Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 7 16 Status Structure Models 2510 and 2510 AT User s Manual Questionable event register The used bits of the Questionable Event Register Figure 7 7 are described as follows Bits BO through B7 Not used Bit B8 Calibration Summary Cal Set bit indicates that an invalid calibration constant was detected during the power up sequence This error will clear after successful calibration of the instrument Bits B9 through B13 Not used Bit B14 Command Warning Warn Set bit indicates that a Signal Oriented Measurement Comman
95. NTEGRAL Set integral constant DERIVATIVE Set derivative constant Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Getting Started 1 25 Table 1 8 Resistance configuration menu Configuration menu item Description FUNCTION Select DC resistance function AC OHMS Select AC resistance function TEMP CONTROL Program DC resistance parameters PROTECTION Configure resistance protection CONTROL ENABLE or DISABLE resistance protection LOLIM Program lower resistance limit HILIM Program higher resistance limit SENSOR TYPE Select sensor type and settings THERMISTOR Program thermistor settings RANGE Set thermistor range 100Q 1kQ 10kQ 100kQ I SRC Set thermistor current AUTO 3 3pA 10pA 33 3pA 100A 833 3pA 2 5mA SENSE MODE Select 2 WIRE or 4 WIRE sense mode RTD Program RTD settings I SRC Set RTD current AUTO 3 3nA 10pA 33 3nA 100nA 833 3pA 2 5mA RANGE Set RTD range 100Q or 1000Q SENSE MODE Select 2 WIRE or 4 WIRE sense mode PID Program PID loop constants for resistance PROPORTIONAL Set proportional constant INTEGRAL Set integral constant DERIVATIVE Set derivative constant Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 1 26 Getting Started Models 2510 and 2510 AT User s Manual Table 1 9 Output configuration menu Configura
96. OMMAND GROUP ATN ATTENTION DCL DEVICE CLEAR IFC INTERFACE CLEAR REN REMOTE ENABLE SPD SERIAL POLL DISABLE SPE SERIAL POLL ENABLE ADDRESS COMMAND GROUP LAG LISTEN ADDRESS GROUP MLA MY LISTEN ADDRESS UNL UNLISTEN TAG TALK ADDRESS GROUP MTA MY TALK ADDRESS UNT UNTALK OTA OTHER TALK ADDRESS ADDRESSED COMMAND GROUP ACG ADDRESSED COMMAND GROUP GTL GO TO LOCAL SDC SELECTIVE DEVICE CLEAR STATUS COMMAND GROUP RQS REQUEST SERVICE SRQ SERIAL POLL REQUEST STB STATUS BYTE EOI END Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com C 14 IEEE 488 Bus Overview Models 2510 and 2510 AT User s Manual Interface function codes The interface function codes which are part of the IEEE 488 standards define an instru ment s ability to support various interface functions and should not be confused with pro gramming commands found elsewhere in this manual The interface function codes for the Model 2510 are listed in Table C 6 The codes define Model 2510 capabilities as follows Table C 6 Model 2510 interface function codes Code Interface function SHI Source Handshake capability AHI Acceptor Handshake capability T5 Talker basic talker serial poll unaddressed to talk on LAG LA Listener basic listener unaddressed to listen on TAG SRI Service Request capability RLI Remote Local capability PPO No Parallel Poll cap
97. Q thermistor 50 to 8 000e4Q 10kQ thermistor 500 to 2 000e5Q 100kQ thermistor 1 to 250Q 100Q RTD 5 to 3 000e3Q 1kQ RTD MINimum 1Q 100Q RTD or thermistor 5Q 1kQ RTD or thermistor 50Q 10kQ thermistor 500Q 100kQ thermistor MAXimum 1 000e3Q 100Q thermistor 9 999e3Q 1kQ thermistor 8 000e4 10kQ thermistor 2 000e5Q 100kQ thermistor 250Q 100Q RTD 3 000e3Q 1kQ RTD DEFault 100Q 100Q RTD or thermistor 1e3Q 1kQ RTD or thermistor 1e4Q 10kQ thermistor 1e5Q 100kQ thermistor Query AMPLitude Query resistance amplitude Description This command programs the amplitude setpoint for the resistance function The amplitude can be set over a range that depends on sensor type The value cannot exceed the protection limits LCONstants SOURCe 1 RESistance L CONstants GAIN n Program proportional constant SOURce 1 RESistance LCONstants DERvative n Program derivative constant SOURce 1 RESistance L CONstants INTegral n Program integral constant Parameters GAIN n 0 to 1e5 Set proportional constant value MINimum 0 MAXimum le5 DEFault 20 0 DERivative n 0 to 1e5 Set derivative constant value MINimum 0 MAXimum le5 DEFault 0 0 INTegral lt n gt Oto le5 Set integral constant value MINimum 0 MAXimum le5 DEFault 0 6 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual SCPI Command Reference
98. SOURce 1 4 STOLerance Program setpoint tolerance parameters PERCent n Percentage of range 0 5 n 0 00 100 00 96 MIN MAX DEF PERCent Query percent of range value POINts Query number of points currently within tolerance COUNt n Number of points in tolerance window 5 n 1 100 MIN MAX DEF COUN Query number of points VOLTage Voltage source commands V LCONstants Set voltage PID loop constants GAIN lt n gt Program voltage loop gain 10 0 lt n gt 0 to le5 MIN MAX DEF GAIN Query voltage loop gain DERivative n Set voltage derivative constant 0 0 n 0 to le5 MINI MAX DEF DERivative Query voltage derivative constant INTegral n Set voltage integral constant 20 0 n 0 to le5 MINI MAX DEF INTegral Query voltage integral constant LEVel V IMMediate V AMPLitude n Set voltage amplitude 0 0 V n 10 to 10 V MIN I MAX I DEF AMPLitude Query voltage amplitude V PROTection V LEVel n Set voltage limit 10 5 V n 0 5 to 10 5 V MINI MAX DEF LEVel Query voltage limit 4 TRIPped Query if limit exceeded 1 tripped 4 0 otherwise Table 10 6 SOURce2 subsystem commands Default Command Description parameter SCPI SOURce2 Path to SOURce2 subsystem TTL LEVel lt NRf gt or lt NDN gt Specify the four bit Digital I O port output value 15 LEVel Query digital output line logic levels
99. SRQ Explains how to program the Status Byte to generate service requests SRQs Shows how to use the serial poll sequence to detect SRQs Status register sets Provides bit identification and command information for the four status register sets Standard Event Status Operation Event Status Mea surement Event Status and Questionable Event Status Queues Provides details and command information on the Output Queue and Error Queue Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 7 2 Status Structure Models 2510 and 2510 AT User s Manual Overview The Model 2510 provides a series of status registers and queues allowing the operator to monitor and manipulate the various instrument events The status structure is shown in Figure 7 1 The heart of the status structure is the Status Byte Register This register can be read by the user s test program to determine if a service request SRQ has occurred and what event caused it Status byte and SRQ The Status Byte Register receives the summary bits of four status register sets and two queues The register sets and queues monitor the various instrument events When an enabled event occurs it sets a summary bit in the Status Byte Register When a summary bit of the Status Byte is set and its corresponding enable bit is set as programmed by the user the RQS MSS bit will set to indicate that an SRQ has occurred Status
100. SS lt n gt 999 999 to 999 999 VSS solid state sensor offset K MINimum 999 999 MAXimum 999 999 DEFault 0 0 ISS lt n gt 999 999 to 999 999 ISS solid state sensor offset K MINimum 999 999 MAXimum 999 999 DEFault 0 0 Query OFFSet Query solid state sensor offset Description These commands program the solid state sensor offset values VSS sets voltage type sensor offset and ISS sets current type sensor offset Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 34 SCPI Command Reference Models 2510 and 2510 AT User s Manual SOURce 1 subsystem The SOURce 1 subsystem provides the most important Model 2510 control functions This subsystem consists of a closed loop PID Proportional Integral and Derivative to control temperature current voltage and resistance The closed loop response of the sys tem is dependent upon the settings of the proportional integral and derivative gain con stants The PID maintains balance in a closed loop system by changing the control variable in response to set point changes See Section 4 PID Control Concepts This bal ance is accomplished by feeding the error which is the difference between the set point and the process variable to the PID controller and the result of the PID calculation drives the process variable towards the set point The Model 2510 can be configured as a 50W voltage source capable of delivering 10V 2 5A or
101. Service personnel are trained to work on live circuits and perform safe installations and repairs of products Only properly trained service personnel may perform installation and service procedures Keithley products are designed for use with electrical signals that are rated Installation Category I and Installation Category II as described in the International Electrotechnical Commission IEC Standard IEC 60664 Most measurement control and data I O signals are Installation Category I and must not be directly connected to mains voltage or to voltage sources with high tran sient over voltages Installation Category II connections require protection for high transient over voltages often associated with local AC mains connections Assume all measurement control and data I O connections are for connection to Category I sourc es unless otherwise marked or described in the Manual Exercise extreme caution when a shock hazard is present Lethal voltage may be present on cable connector jacks or test fixtures The American National Standards Institute ANSI states that a shock hazard exists when voltage levels greater than 30V RMS 42 4V peak or 60VDC are present A good safety practice is to expect that hazardous voltage is present in any unknown circuit before measuring Operators of this product must be protected from electric shock at all times The responsible body must ensure that operators are prevented access and or insulated from every connec
102. Set bit indicates that you attempted to read data from an empty Output Queue Bit B3 Device Dependent Error DDE Set bit indicates that an instrument operation did not execute properly due to some internal condition Bit B4 Execution Error EXE Set bit indicates that the Model 2510 detected an error while trying to execute a command Bit B5 Command Error CME Set bit indicates that a command error has occurred Command errors include JTEEE 488 2 syntax error Model 2510 received a message that does not fol low the defined syntax of the IEEE 488 2 standard Semantic error Model 2510 received a command that was misspelled or received an optional IEEE 488 2 command that is not implemented The instrument received a Group Execute Trigger GET inside a program message Bit B6 User Request URQ Set bit indicates that the LOCAL key on the Model 2510 front panel was pressed Bit B7 Power ON PON Set bit indicates that the Model 2510 has been turned off and turned back on since the last time this register has been read Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 7 12 Status Structure Models 2510 and 2510 AT User s Manual Figure 7 4 Standard event status ESR Standard Event Status Register PON URQ CME EXE DDE QYE OPC B15 B8 B7 B6 B5 B4 B3 B2 B1 BO HARRE GE To Event ESB of Stat
103. T to return to normal display Table 3 3 Current source configuration menu Configuration menu item Description PID PROTECTION Set current protection limit 1 00 to 5 25A Program PID loop constants for current PROPORTIONAL INTEGRAL DERIVATIVE Set proportional constant 0 to 100000 Set integral constant 0 to 100000 Set derivative constant 0 to 100000 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 3 6 Basic Operation Models 2510 and 2510 AT User s Manual Configuring DC resistance Using Table 3 4 as a guide configure the resistance function as follows I OY Pa 10 11 12 13 14 Press CONFIG then R to access the resistance configuration menu Select TEMP CONTROL then press ENTER Select PROTECTION then press ENTER Select CONTROL then press ENTER Select ENABLE then press ENTER Select LOLIM then press ENTER Set the low resistance limit to the desired value then press ENTER Select HILIM then press ENTER Set the high resistance limit to the desired value then press ENTER Press EXIT to return to the CONFIG RESISTANCE menu Select SENSOR TYPE then press ENTER Choose either THERMISTOR or RTD sensor type then press ENTER Program the settings for the selected temperature sensor For example for an RTD sensor choose the following TYPE Select PT385 PT3916 PT100 D100 F100 or USER type
104. TD 100 or 1000 2 1002 1kQ 10kQ and 100k thermistor AD590 current and LM335 voltage solid state temperature sensors Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Basic Operation 3 3 Limit characteristics For each control function T V I and R you can program limits to protect the DUT for damage or even to perform limit testing The Model 2510 will display an appropriate status message if a programmed limit has been exceeded and you can query if a limit has been tripped with an appropriate remote command see Section 10 See Configuring func tions page 3 3 for details on programming protection limits for the various functions Configuring functions The following paragraphs list step by step procedures for configuring the temperature voltage current and resistance functions NOTE See PID Control Concepts page 4 1 for information on setting PID control loop proportional integral and derivative constants See also Sensor coeffi cients page 4 14 for information on thermistor and RTD coefficients Configuring temperature Using Table 3 1 as a guide configure the temperature function as follows f A a panp2 D 11 Press CONFIG then T to access the temperature configuration menu Select PROTECTION then press ENTER Select CONTROL then press ENTER Choose ENABLE then press ENTER Selec
105. TL See local and remote transition in Section 6 Differences remote vs local operation Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Example Programs Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com E 2 Example Programs Models 2510 and 2510 AT User s Manual Introduction This appendix includes two example BASIC programs to demonstrate basic Model 2510 remote operation Program 1 Basic temperature control Program 2 Using setpoint tolerance to generate a temperature sweep Program requirements Computer hardware requirements The following computer hardware is required to run the example programs BM PC compatible computer Keithley KPC 488 2 KPS 488 2 or KPC 488 2AT or CEC PC 488 IEEE 488 interface for the computer Shielded IEEE 488 interface cable Keithley Model 7007 Software requirements In order to use the example programs you will need the following computer software Microsoft QBasic supplied with MS DOS 5 0 or later e MS DOS version 5 0 or later or Windows 95 98 HP style Universal Language Driver CECHP EXE supplied with Keithley and CEC interface cards listed above General program instructions 1 With the power off connect the Model 2510 to the IEEE 488 interface of the com puter Be sure to use a shielded IEEE 488 cable for bus connections Turn on
106. TOGGLE LOCAL key 6 10 Error and status messages 6 9 B 2 Example 2 wire I O connections 2 2 4 wire I O connections 2 3 Autotuning 4 12 Basic temperature control E 6 Digital I O sink operation 5 3 Digital I O source operation 5 4 Engineering units display 1 12 Firmware revision display 1 8 Front panel control measure procedure 3 10 PID control graph 4 5 PID response comparison long lag and Tau times 4 8 PID response comparison short lag and Tau times 4 7 Proportional control graph 4 3 Remote command case sensitive 6 14 Remote command leading colon 6 15 Remote command query 6 14 Remote command short form 6 15 Remote control measure procedure 3 11 Remote response messages 6 18 RTD sensor DC resistance configuration program 3 6 RTD sensor temperature configuration program 3 3 Scientific notation display 1 12 Sensing method 2 wire 2 6 Sensing method 4 wire 2 6 Setpoint tolerance graph 3 17 TEC heating and cooling connections 2 4 Example programs E 1 Program requirements E 2 Setpoint tolerance temperature sweep E 4 E 8 Temperature control E 3 E 6 Examples Front panel displays 1 13 List parameter 7 20 Message exchange protocol MEP F 3 Multiple command message 6 16 Output enable configurations 5 7 Program and read register programming 7 19 Remote FETCH query 3 12 Remote command rules 6 17 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEq
107. Test Equipment 99 Washington Street Depot Melrose MA 02176 Phone 781 665 1400 1 800 517 8431 Toll Free 1 800 517 8431 PALA Visit us at www TestequipmentDepot com KEITHLEY Models 2510 and 2510 AT TEC SourceMeter Users Manual A GREW I MEASURE ITR ONFIDENCE Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com WARRANTY Keithley Instruments Inc warrants this product to be free from defects in material and workmanship for a period of 1 year from date of shipment Keithley Instruments Inc warrants the following items for 90 days from the date of shipment probes cables rechargeable batteries diskettes and documentation During the warranty period we will at our option either repair or replace any product that proves to be defective To exercise this warranty write or call your local Keithley representative or contact Keithley headquarters in Cleveland Ohio You will be given prompt assistance and return instructions Send the product transportation prepaid to the indicated service facility Repairs will be made and the product returned transportation prepaid Repaired or replaced products are warranted for the balance of the original warranty period or at least 90 days LIMITATION OF WARRANTY This warranty does not apply to defects resulting from product modification without Keithley s express written consent or misuse of any product or part This warranty als
108. The serial poll byte contains important information about internal functions See Status Structure in Section 7 Generally the serial polling sequence is used by the controller to determine which of several instruments has requested service with the SRQ line However the serial polling sequence may be performed at any time to obtain the status byte from the Model 2510 Programming syntax The information in this section covers syntax for both common commands and SCPI com mands For information not covered here see the IEEE 488 2 and SCPI standards See Common Commands in Section 8 and SCPI Command Reference in Section 10 for details Command words Program messages are made up of one or more command words Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Remote Operations 6 13 Commands and command parameters Common commands and SCPI commands may or may not use a parameter The following are some examples SAV lt NRf gt Parameter NRf required RST No parameter used SOURce CURRent LCONStants n Parameter n required SYSTem PRESet No parameter used NOTE Atleast one space between the command word and the parameter is required Brackets Some command words are enclosed in brackets These brackets are used to denote an optional command word that does not need to be included in the pro gram message For example
109. Tolerance Percentage value it then waits until the number of readings within the Set point Tolerance Window have occurred at which point the Final Setpoint is reached At that point the unit issues an SRQ over the bus if programmed to do so and turns on the annunciator to indicate the final setpoint has been reached Figure 3 2 Setpoint tolerance operation Setpoint Tolerance Window Final Setpoint SRQ Generated When Final Setpoint is Reached Measured Temperature mi Setpoint Change Not Drawn to Scale Initial Setpoint Remote Command or Front Panel Changes Setpoint NOTE Setpoint tolerance SRQs can be used to generate a temperature sweep See Appendix E for details and an example program Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 3 18 Basic Operation Models 2510 and 2510 AT User s Manual Temperature sensors Open and shorted lead status indications For temperature measurements only Open Lead and Shorted Lead status indications iden tify when a sensor lead is open or shorted The front panel will display Open Lead or ShrtLead where appropriate The conditions for open and shorted lead are summarized in Table 3 10 Table 3 10 Sensor open lead and shorted lead ranges Sensor Open lead Shorted lead Thermistor Temp 50 C Temp gt 250 C RTD Temp gt 250 C Temp lt 50 C V SS Temp lt 50 C 0 001V to 0 0
110. UTPUT ON OFF key WARNING The Model 2510 TEC SourceMeter was designed as a general purpose instrument which precludes the use of voltage and or current barriers Therefore there is no intrinsically safe barrier including output enable in the Model 2510 Even with the output enable feature in use it is possible under certain fault conditions for example with a pro gramming error or instrument failure to present a shock hazard to the operator or damage devices even when the system appears to be safe such as when voltage and or current conditions are below safety limits or the output is disabled Use appropriate guards shields and insula tors on external connectors to protect any user or maintenance person nel from the risk of electric shock or mechanical injury Activating output enable Output enable can be activated by using the CONFIG OUTPUT menu Follow these steps to activate output enable 1 Press CONFIG then OUTPUT Select ENABLE then press ENTER From the OUTPUT ENABLE menu choose ENABLE then press ENTER to acti vate the output enable line 4 Press EXIT to return to normal display Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Figure 5 4 Using output enable Model 2510 I Enable i pin 8 1 Enable Digital I O I I I l I I I GND pin 5 or 9 A 2510 OUTPUT can be turned on Model 2510
111. Vel Query low limit LOW TRIPped Query if low limit exceeded 1 exceeded STATe Query is protection enabled 1 enabled The HIGH and LOW commands program the high and low limits respectively for the temperature function while the STATe command enables and disables temperature function limits The two TRIPPed queries return a value of 1 if the corresponding limit is exceeded or a value of 0 if it is not exceeded The high limit cannot be set lower than the low limit and the low limit cannot be set higher than the high limit Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual SCPI Command Reference 10 41 Set voltage source value Query voltage source value This command programs the amplitude setpoint for the voltage source The voltage amplitude can be set over a range of 10V but the value Voltage function AMPLitude n SOURce 1 VOLTage LEVel 1MMediate AMPLitude n Program voltage source value Parameters n 10 to 10V MINimum MAXimum DEFault Query AMPLitude Description cannot exceed the voltage protection limit LCONStants SOURce 1 VOLTage LCONstants GAIN n SOURce 1 VOLTage LCONstants DERvative n SOURce 1 VOLTage LCONstants INTegral n Parameters Query Description GAIN lt n gt 0 to 1e5 MINimum MAXimum DEFault DERivative n 0 to 1e5
112. W DATES Display calibration dates and count SAVE Save calibration constants LOCK Lock out calibration CHANGE PASSWORD Change calibration password TEST Perform tests on Model 2510 DISPLAY TESTS Test front panel keys and display digits KEYS Test front panel keys DISPLAY PATTERNS Test display pixels and annunciators CHAR SET Test display characters A D CTRL Select line frequency 50 or 60Hz LINE FREQUENCY Set the line frequency GENERAL Select general operations DIGOUT Set Digital I O port bit pattern 0 to 15 SERIAL Display serial number firmware revision SCPI version TIMESTAMP Reset timestamp YES or NO NUMBERS Select engineering units or scientific notation display ENGR format top display line only Select FLOATING SCIENTIFIC EXP or FIXED EXP for SCIENTIFIC NOTES Top level menu choices indicated in bold Indentation identifies each lower submenu level 2When the remote operation interface selection GPIB or RS 232 is changed the Model 2510 performs a power on reset To check or change options of the selected interface you must re enter the menu structure 3Only VIEW DATES is accessible when calibration is locked Password required to unlock calibration See Service Manual 4Press EXIT key to cancel test Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Getting Started 1 21 Rules to navigate menus Many functions and operat
113. When changing from Local to Remote operation the following takes place All menus are exited All pending front panel commands are aborted All other settings remain unaffected Remote to local transition When changing from Remote to Local operation the following takes place The Model 2510 stops taking readings and is placed into idle All user defined displays are disabled e Readings are continuously taken Setting interface parameters e RS 222 settings for Baud Rate Parity and Data Bits are accessible only from the front panel while RS 232 is enabled The IEEE 488 address can only be changed from the front panel while the IEEE 488 bus is enabled Selecting an interface The Model 2510 supports two built in remote interfaces GPIB General Purpose Interface Bus e RS 232 interface You can use only one interface at a time The factory default interface selection is the GPIB bus You can select the interface only from the front panel The interface selection is stored in non volatile memory it does not change when power has been off or after a remote interface reset The GPIB bus is the IEEE 488 interface You must select a unique address for the Model 2510 The address is displayed when the instrument is turned on and you can use the MENU COMMUNICATION GPIB selection to view the address after the unit is turned on At the factory the address is set to 15 Test Equipment Depot 800 517 8431 99 Washin
114. a 50W current source capable of delivering 5A 10V Table 10 5 summarizes SOURce 1 subsystem commands Control source output off IMMediate SOURCe 1 CLEar IMMediate Turn source output off Description This command is used to turn off the source output The output will turn off after all programmed control measure operations are completed The instrument returns to the idle state when ABORT is sent This command performs the same function as OUTPut OFF Select source function FUNCEion MODE lt name gt SOURCe 1 FUNCtion MODE lt name gt Select source function Parameters name VOLTage Select voltage source function CURRent Select current source function TEMPerature Select temperature function RESistance Select resistance function Query FUNCton MODE Query current amplitude Description This command selects the Model 2510 source function in the same man ner as the four front panel function keys T V I and R System control depends upon correct programming of PID constants see below Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual SCPI Command Reference 10 35 Current function AMPLitude n SOURce 1 CURRent LEVel MMediate AMPLitude n Program current amplitude Parameters lt n gt 5 to 5A Set current amplitude MINimum 5 MAXimum 5 DEFault 0 0 Query AMPLitude Query curren
115. abilities PPO DC Device Clear Function DC1 defines the ability of the instrument to be cleared initialized DT Device Trigger Function DT1 defines the ability of the Model 2510 to have readings triggered C Controller Function The instrument does not have controller capabilities CO TE Extended Talker Function The instrument does not have extended talker capa bilities TEO LE Extended Listener Function The instrument does not have extended listener capabilities LEO E Bus Driver Type The instrument has open collector bus drivers E1 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com D IEEE 488 and SCPI Conformance Information Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com D 2 IEEE 488 and SCPI Conformance Information Models 2510 and 2510 AT User s Manual Introduction The IEEE 488 2 standard requires specific information about how the Model 2510 imple ments the standard Paragraph 4 9 of the IEEE 488 2 standard Std 488 2 1987 lists the documentation requirements Table D 1 provides a summary of the requirements and pro vides the information or references in the manual for that information Table D 2 lists the coupled commands used by the Model 2510 The Model 2510 complies with SCPI version 1996 0 Table 10 1 through Table 10 10 in Section 10 list the SCPI confirmed c
116. ability DC1 Device Clear capability DTI Device Trigger capability CO No Controller capability El Open collector bus drivers TEO No Extended Talker capability LEO No Extended Listener capability SH Source Handshake Function SH1 defines the ability of the instrument to initiate the transfer of message data over the data bus AH Acceptor Handshake Function AH1 defines the ability of the instrument to guarantee proper reception of message data transmitted over the data bus T Talker Function The ability of the instrument to send data over the bus to other devices is provided by the T function Instrument talker capabilities T5 exist only after the instrument has been addressed to talk L Listener Function The ability for the instrument to receive device dependent data over the bus from other devices is provided by the L function Listener capabilities L4 of the instrument exist only after it has been addressed to listen SR Service Request Function SR1 defines the ability of the instrument to request service from the controller RL Remote Local Function RL defines the ability of the instrument to be placed in the remote or local modes Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual IEEE 488 Bus Overview C 15 PP Parallel Poll Function The instrument does not have parallel polling cap
117. age available seen F 4 General operation notes esee F 4 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com List of Illustrations 1 Getting Started Figure 1 1 Model 2510 front panel eee 1 5 Figure 1 2 Model 2510 rear panel sere 1 7 Figure 1 3 Maii menu tree ue eie te RC RH CREE CELER e 1 22 2 Connections Figure 2 1 2 wire input output connections seeeeeeeree 2 2 Figure 2 2 4 wire input output connections eee 2 3 Figure 2 3 TEC connections for positive current cooling operation 2 4 Figure 2 4 Sensing methods n te e eri a ep pensa 2 6 Figure 2 5 Ground connect mode essere 2 7 Figure 2 6 AC ohms measurement sse 2 7 3 Basic Operation Figure 3 1 Voltage and current limit operating boundaries 3 15 Figure 3 2 Setpoint tolerance operation eese 3 17 4 PID Control Concepts Figure 4 1 Temperature control model eee 4 2 Figure 4 2 Proportional control characteristics esses 4 3 Figure 4 3 PID control characteristics eere 4 5 Figure 4 4 Response comparison example 1 short Lag and Tau times eee 4 7 Figure 4 5 Response comparison example 2 long Lag and Tau times see 4 8 Figure 4 6 System response
118. al SCPI Command Reference 10 31 DELTa lt n gt SENSe 1 TEMPerature RTD DELTa n Program RTD sensor delta Parameters n 0 to 5 RTD 6 coefficient MINimum 0 MAXimum 5 DEFault 1 507 Query DELT2 Query RTD 6 coefficient Description This command programs the RTD temperature sensor 6 coefficient for the USER type RTD sensor Thermistor sensor parameters RANGe n SENSe 1 TEMPerature THERmistor RANGe n Set thermistor resistance range Parameters n 0 to 3e5 Set thermistor resistance range 100 1e3 1e4 1e5 MINimum 0 MAXimum 3e5 DEFault le4 Query RANGe Query sensor resistance range Description This command programs the temperature sensor resistance range It affects only thermistor sensor types Nominal ranges are 100 1e3 1e4 and 1e5 A lt n gt SENSe 1 TEMPerature THERmistor A lt n gt Program thermistor sensor A value Parameters n 10 to 10 thermistor A coefficient MINimum 10 MAXimum 10 DEFault 1 13030e 3 Query A Query thermistor A coefficient Description This command programs the thermistor temperature sensor A coeffi cient NOTE See Sensor coefficients page 4 14 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 32 SCPI Command Reference Models 2510 and 2510 AT User s Manual B lt n gt SENSe 1 TEMPerature THERmistor B n Program thermistor sensor B value Parameters n 10 to 10 thermist
119. al equivalent Binary 11010 Decimal 26 Hexadecimal 1A Octal 32 Note that Figure 7 2 includes the decimal weight for each register bit To set bits B4 B3 and B1 the decimal parameter value would be the sum of the decimal weights for those bits 16 8 2 26 Figure 7 2 16 bit status register A Bits 0 through 7 Bit Position B7 B6 B5 B4 B3 B2 Pl BO Binary Value 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Decimal 128 64 32 16 8 4 2 1 Weights 27 26 25 24 23 24 21 29 B Bits 8 through 15 Bit Position B15 B14 B13 B12 B11 BIO B9 B8 Binary Value 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Decimal 32768 16384 8192 4096 2048 1024 512 256 Weights 215 214 213 212 211 219 29 28 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 7 6 Status Structure Models 2510 and 2510 AT User s Manual The lt NDN gt non decimal numeric parameter type is used to send non decimal values These values require a header B H or Q to identify the data format being sent The letter in the header can be upper or lower case The lt NRf gt numeric representation for mat parameter type is used to send decimal values and does not use a header The follow ing examples show the proper parameter syntax for setting Bits B5 B3 and B2 b10
120. alf full The Model 2510 recognizes XON and XOFF sent from the controller An XOFF will cause the instrument to stop outputting characters until it sees an XON Incoming commands are processed after the lt CR gt character is received from the controller If NONE is the selected flow control there will be no signal handshaking between the controller and the Model 2510 Data will be lost if transmitted before the receiving device is ready Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 6 8 Remote Operations Models 2510 and 2510 AT User s Manual RS 232 connections The RS 232 serial port is connected to the serial port of a computer using a straight through RS 232 cable terminated with DB 9 connectors Do not use a null modem cable The serial port uses the transmit TXD receive RXD and signal ground GND lines of the RS 232 standard Figure 6 4 shows the rear panel connector for the RS 232 interface and Table 6 1 shows the pinout for the connector See Figure 6 3 for the rear panel con nector location If your computer uses a DB 25 connector for the RS 232 interface you will need a cable or adapter with a DB 25 connector on one end and a DB 9 connector on the other wired straight through not null modem NOTE To minimize interference caused by electromagnetic radiation use only shielded RS 232 cables such as the Keithley Model 7009 5 Figure 6 4 RS 232 interface connect
121. alue that is sent deter mines which bits in the register gets set See Section 7 for details Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual SCPI Command Reference 10 47 Read condition registers CONDition STATus MEASurement CONDition Read Measurement Condition STATus QUEStionable CONDition Read Questionable Register STATus OPERation CONDition Read Operation Condition Description These query commands are used to read the contents of the condition registers Select default conditions PRESet STATus PRESet Return registers to default conditions Description When this command is sent the following SCPI event registers are cleared to zero 0 1 Operation Event Enable Register 2 Event Enable Register 3 Measurement Event Enable Register NOTE The Standard Event Register is not affected by this command Error queue NEXT STATus QUEue NEXT Read Error Queue Description As error and status messages occur they are placed into the Error Queue This query command is used to read those messages See Appendix B for a list of messages NOTE The STATus QUEue NEXT query command performs the same function as the SYSTem ERRor query command See SYSTem subsystem page 10 48 CLEar STATus QUEue CLEar Clear Error Queue Description This action command is used to clear the Error Queue of messages Test Equip
122. and 2510 AT User s Manual Primary address The Model 2510 ships from the factory with a GPIB primary address of 15 When the unit powers up it momentarily displays the primary address You can set the address to a value from 0 to 30 but do not assign the same address to another device or to a controller that is on the same GPIB bus controller addresses are usually 0 or 21 The primary address can be checked and or changed from the COMMUNICATION option of the Main Menu See Main menu page 1 19 RS 232 interface operation NOTE The programmable aspects of RS 232 operation baud rate data bits parity and terminator are configured from the COMMUNICATION option of the Main Menu See Main menu page 1 19 Sending and receiving data The RS 232 interface transfers data using 8 data bits 1 stop bit and no parity Make sure the device you connect to the Model 2510 also uses these settings You can break data transmissions by sending a C decimal 3 or X decimal 18 charac ter string to the instrument This clears any pending operation and discards any pending output Baud rate The baud rate is the rate at which the Model 2510 and the programming terminal commu nicate Choose one of these available rates e 57600 e 38400 19200 9600 4800 2400 1200 600 e 300 The factory selected baud rate is 9600 When you choose a baud rate make sure the programming terminal or printer that you are conne
123. and indicates that it is a SCPI command but does not conform to the SCPI standard of set commands and it is not a command recog nized by the SCPI consortium SCPI commands that use one or more non SCPI parameters are explained by notes See Programming syntax page 6 12 for more information Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual SCPI Command Reference 10 3 Table 10 1 DISPlay subsystem commands Default Command Description parameter SCPI DISPlay WINDow 1 V ATTRibutes Returns a 20 character string representing the attributes of the characters on the top line Blink ing characters are and others are 0 TEXT V DATA string Sets a 20 character string to be displayed on the top Note V line DATA Returns the programmed string for the top line V STATe lt b gt Enables 1 ON or disables 0 OFF the display of Note v the user defined text on the top line of the display STATe Returns the state of the user defined message V DATA Returns the 20 characters that are displayed on the top line WINDow2 ATTRibutes Returns a 32 character string representing the attributes of the characters on the bottom line Blinking characters are and others are 0 TEXT v DATA lt string gt Sets a 32 character string to be displayed on the bot Note V tom line DATA Returns the programmed string for the bott
124. apidly the system responds Values that are too large may cause the system to become unstable Using autotune commands Autotune command summary Table 4 3 summarizes Model 2510 AT autotune commands Note that all of these com mands are part of the SOURce 1 TEMPerature subsystem which is fully described in the Section 10 of the Model 2510 User s Manual Table 4 3 Autotune commands Command SOURce 1 TEMPerature ATUNe LCONstants MSETtle GAIN DERivative INTegral TRANSsfer MOVershoot GAIN DERivative INTegral TRANSsfer TAU LAG STARt lt n gt STARt STOP lt n gt Description Path to SOURce 1 commands Temperature commands Auto Tune commands Temperature PID loop constants Use minimum settling time criteria Query temperature gain constant Query temperature derivative constant Query temperature integral constant Accept and install MSET constants as defaults Use minimum overshoot criteria Query temperature gain constant Query temperature derivative constant Query temperature integral constant Accept and install MOV constants as defaults Query tau value Query lag value Set start temperature value Query start temperature value Set stop temperature value Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 4 12 PID Control Concepts Models 2510 and 2510 AT User s Manual Table 4 3 cont Autotune commands
125. cator The ON OFF indicator shows when the source output is turned on This indicator will glow with different colors depending on the following conditions Red heating Peltier voltage Green cooling Peltier voltage Red and green both on yellow voltage overflow not voltage limit EDIT keys The EDIT keys allow you to program setpoint and other values and scroll through menu selections as follows When programming setpoint or other values use the A and W keys to increment and decrement values use the left and right arrow keys to select the cursor posi tion Pressing any one of these keys enters the setpoint editing mode for the selected function When scrolling through menu selections use the lt and keys to choose specific items See Menus page 1 19 for more details Status and error messages During Model 2510 operation and programming you will encounter a number of front panel messages Status and error messages are displayed momentarily See Appendix B for a list of status and error messages and ways to fix common errors Front panel tests Use the TEST DISPLAY TESTS selection of the main MENU to test various aspects of the front panel Test selections include KEYS Front panel keys are tested Pressing a key displays a message that identi fies that key Pressing EXIT twice cancels this test DISPLAY PATTERNS Use this selection to turn on all display pixels and annun ciators
126. ce function commands 4 LCONSstants Set resistance PID loop constants GAIN n Set resistance loop gain 20 0 n 0 to le5 MINI MAX DEF GAIN Query resistance loop gain DERivative n Set resistance derivative constant 0 0 n 0 to le5 MIN MAX DEF DERivative Query resistance derivative constant INTegral n Set resistance integral constant 0 6 n 0 to le5 MINI MAX DEF INTegral Query resistance integral constant Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 8 Table 10 5 continued SCPI Command Reference SOURce 1 subsystem commands Models 2510 and 2510 AT User s Manual Command Description Default parameter SCPI SOURce 1 RESistance LEVel 4 IMMediate V AMPLitude n Set resistance level n 1 to 1 000e3 Q 100 1000 RTD V for 100Q thermistor 1 to 250 Q or ther for 100 RTD 5 to 9 999e3 1e3 IkKO RTD Q for 1kQ thermistor 5 to 3 000e3 Q or ther for 1kQ RTD 50 to 8 000e4 Q for 10kQ 1e4 10kQ ther or thermistor 500 to 2 000e5 Q for 100kQ 1e5 100kQ ther thermistor MIN IMAX DEF AMPLitude Query resistance level V PROTection Set resistance protection V HIGH Upper resistance limit LEVel n Set upper resistance limit 200 1000 RTD n 50 to 1 000e3 Q for 100 or ther thermistor 50 to 250 2 for 2
127. constant Description These commands program the temperature function PID loop constants which must be set to appropriate values for suitable control characteris tics See Section 4 PID Control Concepts for information on choosing appropriate values Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 40 PROTection SOURCe 1 TEMPerature PROTection HIGH LEVel n SOURce 1 TEMPerature PROTection HIGH TRIPped SOURCe 1 TEMPerature PROTection LOW LEVel n SOURce 1 TEMPerature PROTection LOW TRIPped SOURce 1 TEMPerature PROTection STATe lt b gt Parameters Query Description SCPI Command Reference Models 2510 and 2510 AT User s Manual Program temperature high limit Query if high limit exceeded Program temperature low limit Query if low limit exceeded Enable disable protection HIGH lt n gt 50 to 250 C Set high limit value 223 15 to 523 15K 58 to 482 F MINimum 50 C 223 15K 58 F MAXimum 250 C 523 15K 482 F DEFault 50 C 323 15K 122 F LOW lt p gt 50 to 250 C Set low limit value 223 15 to 523 15K 58 to 482 F MINimum 50 C 223 15K 58 F MAXimum 250 523 15K 482 F DEFault 0 C 273 15K 32 F STATe lt b gt ON I OFF Enable disable protection ONI1 Enable protection OFF 0 Disable protection HIGH LEVel Query high limit HIGH TRIPped Query if high limit exceeded 1 exceeded LOW LE
128. control The on off control method used by many conventional thermostats is inadequate for ther moelectric cooler TEC control situations When the TEC is warmer than the setpoint temperature the TEC power is turned on to maximum Once the TEC is cooler than the setpoint temperature the TEC power is turned off completely The turn on and turn off temperatures usually differ by a small amount to minimize the amount of temperature cycling resulting in a certain amount of hysteresis However temperature fluctuations are generally too large for precise TEC temperature control due in large part to the thermal time constant of the TEC and the hysteresis required to limit excessive temperature cycling Proportional P control A proportional controller usually performs better than the on off type discussed above by applying power W to the cooler in proportion to the difference in temperature between the cooler and setpoint temperatures as follows W K x T T Here K is the proportional gain of the controller As its gain is increased the system responds faster to changes in setpoint but it becomes progressively underdamped and eventually unstable as shown in Figure 4 2 The final cooler temperature lies above the setpoint with this method because some temperature dif ference is required to maintain power to the cooler To use the Model 2510 as a P controller set the derivative and integral constants to zero Figure 4 2 Proporti
129. cribes commands to acquire post processed readings both trigger and acquire readings and to perform a single measurement Command examples Gives several examples using signal oriented commands Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 9 2 SCPI Signal Oriented Measurement Commands Models 2510 and 2510 AT User s Manual Command summary The signal oriented measurement commands are used to acquire readings such as thermo electric cooler DC current power and resistance You can use these high level instructions to trigger and acquire readings directly without having to send any other commands Signal oriented commands are summarized in Table 9 1 NOTE The FORMat ELEMents command determines the reading elements returned by MEAS READ and FETCH See FORMat subsystem page 10 19 Table 9 1 Signal oriented measurement command summary Command Description MEASure CURRent DC POWer RESistance DC AC TSENSor VOLTage DC MEASure READ FETCh Query DC current measurement of thermoelectric cooler Query power measurement of thermoelectric cooler Query DC ohms measurement of thermoelectric cooler Query AC ohms measurement of thermoelectric cooler TEMPerature Query temperature measurement Query temperature sensor very useful in SOUR FUNC RES mode Query DC voltage measurement of thermoelectric cooler P
130. cting to the Model 2510 can support the baud rate you selected Both the Model 2510 and the other device must be configured for the same baud rate Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Remote Operations 6 7 Data bits and parity The RS 232 interface can be configured to send receive data that is 7 or 8 bits long using even odd or no parity No parity is only valid when using 8 data bits Terminator The Model 2510 can be configured to terminate each program message that it transmits to the controller with any of the following combinations of CR and LF CR Carriage return lt CR LF gt Carriage return and line feed lt LF gt Line feed lt LF CR gt Line feed and carriage return Flow control signal handshaking Signal handshaking between the controller and the instrument lets the two devices com municate with each other about readiness to receive data The Model 2510 does not sup port hardware handshaking flow control Software flow control is in the form of XON and XOFF characters and is enabled when XON XOFF is selected from the RS 232 FLOW CONTROL menu When the input queue of the unit becomes more than 34 full the instrument issues an XOFF command The con trol program should respond to this and stop sending characters until the Model 2510 issues the XON which it will do once its input buffer has dropped below h
131. d the path pointer would reset to the root level and expect a root command Since enab is not a root command an error would occur Command path rules Each new program message must begin with the root command unless it is optional e g SENSe If the root is optional simply treat a command word on the next level as the root For fastest operation do not send optional data The colon at the beginning of a program message is optional and need not be used However eliminating the first colon will result in fastest operation Example stat pres stat pres When the path pointer detects a colon it moves down to the next command level An exception is when the path pointer detects a semicolon which is used to sep arate commands within the program message see next rule When the path pointer detects a colon that immediately follows a semicolon it resets back to the root level The path pointer can only move down It cannot be moved up a level Executing a command at a higher level requires that you start over at the root command Using common and SCPI commands in the same message Both common commands and SCPI commands can be used in the same message as long as they are separated by semicolons A common command can be executed at any com mand level and will not affect the path pointer Example stat oper enab lt NRf gt ESE lt NRf gt Program message terminator PMT Each program message
132. d EE Standard Event 3 531 I Protection offset data invalid EE Standard Event 3 532 I Protection DAC Overflow EE Standard Event 3 533 I Protection DAC Underflow EE Standard Event 3 540 V Meas gain data invalid EE Standard Event 3 541 V Meas offset data invalid EE Standard Event 3 542 V Meas gain data invalid EE Standard Event 3 4 543 V Meas offset data invalid EE Standard Event 3 550 I Meas gain data invalid EE Standard Event 3 4551 I Meas offset data invalid EE Standard Event 3 552 I Meas gain data invalid EE Standard Event 3 4553 I Meas offset data invalid EE Standard Event 3 560 100 O Thermistor data invalid EE Standard Event 3 561 1kO Thermistor data invalid EE Standard Event 3 562 10kO Thermistor data invalid EE Standard Event 3 563 100kO Thermistor data invalid EE Standard Event 3 564 RTD data invalid EE Standard Event 3 4565 VSS data invalid EE Standard Event 3 4566 ISS data invalid EE Standard Event 3 4 570 AC Ohms data invalid EE Standard Event 3 Lost data errors 602 GPIB address lost EE Standard Event 3 603 Power on state lost EE Standard Event 3 604 DC calibration data lost EE Standard Event 3 605 Calibration dates lost EE Standard Event 3 606 GPIB comm language lost error EE Standard Event 3 Communication errors 700 Invalid system communication EE Standard Event 3 701 ASCII only with RS 232 EE Standard Event 3 Additional command execution errors 800 I
133. d are absolute As a result there are no high low limits or STATe commands since voltage protection is always active Setpoint tolerance PERCent n SOURce 1 STOLerance PERCent n Program tolerance window Parameters n 0 to 100 Program tolerance of range MINimum 0 MAXimum 100 DEFault 0 5 Query PERCent Query percent tolerance Description This command is used to program the percentage of range for the set point tolerance Ranges depend on selected function as follows Function Range Temperature 275 C 275K 495 F Voltage 20V Current 10A Resistance IMQ 100kQ thermistor 100kQ 10kQ thermistor 10kQ 1kQ thermistor or RTD 1kQ 100 thermistor or RTD Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual SCPI Command Reference 10 43 NOTE Bit 12 of the Measurement Event Register will be set when the setpoint is within the percent tolerance for the programmed number of readings see below See Section 7 for status register details COUNI lt n gt SOURce 1 STOLerance COUNt n Set number of readings for tolerance Parameters n 1 to 100 Number of readings MINimum 1 MAXimum 100 DEFault 5 Query COUNt Query number of readings Description This command is used to program how many readings should be within the tolerance window programmed with the PERCent command for the se
134. d meas urement using current reversals available over bus only 11 23 C 5 C 12 For 1kQ unbalance in LO lead Minimum amplifier specification 13 Resistance range 0Q to 100Q for rated accuracy 14 Accuracy figures represent the uncertainty that the Model 2510 may add to the temperature measurement not including ther mistor uncertainty These accura cy figures are for thermistors with typical A B C constants HW 3 13 02 Rev B Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT Specifications A 3 Accuracy calculations The information below discusses how to calculate accuracy for both TEC measurement and thermal feedback element specifications Accuracy specifications are stated as follows Accuracy of reading offset As an example of how to calculate the actual limits assume an output voltage of 5V You can compute the limits from one year operating voltage accuracy specifications as follows Accuracy of reading offset 0 1 X 5V 4mV t 5mV 4mV 9mV Thus the actual operating voltage range is 5V 9mV or from 4 991 to 5 009V Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Status and Error Messages Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com B 2 Status and Error Messages Models 2510 and 25
135. d parameter has been ignored Bit B15 Always zero Figure 7 7 Questionable event status Warn Ibo B15 B14 B13 B9 B7 BO Warn ay B15 B14 B13 B9 B7 BO Questionable Condition A x stat ques cond Register Questionable stat ques Event Register To QSB of Status Byte Register See Figure 7 1 Questionable Event Enable Register stat ques enab lt NRf gt stat ques enab Warn CAL B15 B14 B13 B9 B8 B7 BO Warn Command Warning Logical OR Cal Calibration Summary amp Logical AND Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Status Structure 7 17 Condition registers As Figure 7 1 shows each status register set except the Standard Event Register set has a condition register A condition register is a real time read only register that constantly updates to reflect the present operating conditions of the instrument For example while the Model 2510 is in the idle state bit B10 Idle of the Operation Condition Register will be set When the instrument is taken out of idle bit B10 clears The commands to read the condition registers are listed in Table 7 5 For details on read ing registers see Reading registers page 7 6 Table 7 5 Condition register commands Command Description STATus OPERation CONDition Read Operation Con
136. ding status registers ASCii lt name gt ASCii Decimal format HEXadecimal Hexadecimal format OCTal Octal format BINary Binary format Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Status Structure 7 7 Status byte and service request SRQ Service request is controlled by two 8 bit registers the Status Byte Register and the Ser vice Request Enable Register Figure 7 3 shows the structure of these registers Figure 7 3 Status byte and service request SRQ Status Summary Message lt _ Read by Serial Poll osB RSS esp MAV Osg EAV MSB status Byte B7 at B5 B4 B3 B2 B1 BO Register Read by STB Service STB Request Serial Poll Generation Service OSB ESB MAV QSB EAV MSB Request Register OSB Operation Summary Bit MSS Master Summary Status RQS Request for Service ESB Event Summary Bit MAV Message Available QSB Questionable Summary Bit EAV Error Available MSB Message Summary Bit amp Logical AND OR Logical OR Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 7 8 Status Structure Models 2510 and 2510 AT User s Manual Status byte register The summary messages from the status registers and queues are used to set or clear the appropriate bits
137. dition Register STATus MEASurement CONDition Read Measurement Condition Register STATus QUEStionable CONDition Read Questionable Condition Register Event registers As Figure 7 1 shows each status register set has an event register When an event occurs the appropriate event register bit sets to 1 The bit remains latched to 1 until the register is reset Reading an event register clears the bits of that register CLS resets all four event registers The commands to read the event registers are listed in Table 7 6 For details on reading registers see Reading registers page 7 6 Table 7 6 Event register commands Command Description Default ESR Read Standard Event Status Register Note STATus OPERation EVENt Read Operation Event Register STATus MEASurement EVENt Read Measurement Event Register STATus QUEStionable EVENt Read Questionable Event Register Note Power up and CLS resets all bits of all event registers to 0 STATus PRESet has no effect Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 7 18 Status Structure Models 2510 and 2510 AT User s Manual Event enable registers As Figure 7 1 shows each status register set has an enable register Each event register bit is logically ANDed amp to a corresponding enable bit of an enable register Therefore when an event bit is set and the corresponding
138. dressed multiline commands In this instance the SDC command is being sent to the instrument UNL is generally sent as part of the sequence to ensure that no other active listeners are present Note that ATN is true for both the listen command and the SDC command byte itself Table C 3 Typical addressed multiline command sequence Data bus Step Command ATN state Hex Decimal 1 UNL Set low 63 2 LAG Stays low 56 3 SDC Stays low 4 4 Returns high Assumes primary address 24 Table C 4 gives a typical common command sequence In this instance ATN is true while the instrument is being addressed but it is set high while sending the common command string Table C 4 Typical addressed common command sequence Data bus Step Command ATN state Decimal 1 UNL Set low 63 2 LAG Stays low 56 3 Data Set high 4 Data Stays high 5 Data Stays high 6 Data Stays high Assumes primary address 24 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual IEEE command groups IEEE 488 Bus Overview C 13 Command groups supported by the Model 2510 are listed in Table C 5 Common com mands and Table C 5 SCPI commands are not included in this list IEEE command groups UNIVERS LISTEN TALK HANDSHAKE COMMAND GROUP NDAC NOT DATA ACCEPTED NRFD NOT READY FOR DATA DAV DATA VALID AL C
139. e Constant Peltier Voltage Constant Peltier Current Constant Thermistor Resistance CONTROL METHOD Programmable software PID loop Proportional Integral and Derivative gains independently program mable SETPOINT SHORT TERM STABILITY 0 005 C rms 3 TEC OUTPUT SPECIFICATIONS OUTPUT RANGE 10 VDC at up to 5 ADC OUTPUT RIPPLE 5mV rms 5 AC RESISTANCE EXCITATION 9 6mA 190p1A 2 TEC MEASUREMENT SPECIFICATIONS FUNCTION 1 Year 23 C 5 C Operating Resistance 98 Operating Voltage 5 Operating Current AC Resistance x 2 096 of rdg 0 19 0 1 of rdg 4mV 0 4 of rdg 8mA 0 10 of rdg 0 02Q OPEN SHORTED THERMOELECTRIC DETECTION LOAD IMPEDANCE Stable into 1pF typical SETPOINT LONG TERM STABILITY 0 01 C 2 4 SETPOINT RANGE 50 C to 225 C OVER TEMPERATURE LIMIT 250 C max UNDER TEMPERATURE LIMIT 50 C max SETPOINT RESOLUTION 0 001 C 1mV 100pA 0 01 of nominal 25 C thermistor resistance HARDWARE CURRENT LIMIT 1 0A to 5 25A 5 SOFTWARE VOLTAGE LIMIT 0 5 to 10 5V 5 COMMON MODE VOLTAGE 30VDC maximum COMMON MODE ISOLATION gt 10 Q 1500pF MAX SENSE LEAD RESISTANCE 1Q for rated accuracy MAX FORCE LEAD RESISTANCE 0 10 THERMAL FEEDBACK ELEMENT SPECIFICATIONS 1 Year 23 C 5 C Sensor Type 1kQ 2 50 mA 833 pA 2 5mA Excitation Compliance Nominal Resistance Range 833 HA 0 250 Q 42 9 0 2 50 kQ 42 9 0 1kQ 12 99
140. e Model 2510 goes back into idle at which time the FETCh command is exe cuted The readings are sent to the computer and displayed when the unit is addressed to talk INITiate IMMediate Description This command is used to trigger readings but it does not request read ings from the unit The INITiate command starts operation by taking the instrument out of idle After all control measure operations are com pleted the Model 2510 goes back into idle There is an implied INIT with READ and MEAS but the Model 2510 does not return to idle before the next command is executed since the instrument does not sup port overlapped INIT If a READ or MEAS command is sent while the Model 2510 is taking readings no INIT ignored error will be generated Command examples MEAS TEMP Query temperature MEAS POW Query thermoelectric cooler power MEAS RES AC Query cooler AC resistance Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 SCPI Command Reference Reference tables Summarizes each SCPI command subsystem SCPI subsystems Provides detailed information on all commands in each SCPI subsystem Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 2 SCPI Command Reference Models 2510 and 2510 AT User s Manual Reference tables The SCPI commands that control the Model 2510 are summarized in t
141. e SRQ Enable Register are listed in Table 7 3 Serial polling and SRO Any enabled event summary bit that goes from 0 to 1 will set bit B6 and generate an SRQ service request In your test program you can periodically read the Status Byte to check if an SRQ has occurred and what caused it If an SRQ occurs the program can for exam ple branch to an appropriate subroutine that will service the request Typically SRQs are managed by the serial poll sequence of the Model 2510 If an SRQ does not occur bit B6 RQS of the Status Byte Register will remain cleared and the pro gram will simply proceed normally after the serial poll is performed If an SRQ does occur bit B6 of the Status Byte Register will set and the program can branch to a service subroutine when the SRQ is detected by the serial poll The serial poll automatically resets RQS of the Status Byte Register This allows subse quent serial polls to monitor bit B6 for an SRQ occurrence generated by other event types After a serial poll the same event can cause another SRQ even if the event register that caused the first SRQ has not been cleared The serial poll does not clear MSS The MSS bit stays set until all Status Byte summary bits are reset SPE SPD serial polling The SPE SPD General Bus Command sequence is used to serial poll the Model 2510 Serial polling obtains the serial poll byte status byte Typically serial polling is used by the controller to determin
142. e thermistor resistance from the measured voltage Vy and the current as follows The main problem with 2 wire connections is the wire resistance Rw Since the test cur rent I causes a small but significant voltage drop across the wire resistances the mea sured voltage Vy will not be exactly the same as the voltage Vr directly across the thermistor and considerable resistance and temperature measurement error can result Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 2 6 Connections Models 2510 and 2510 AT User s Manual Figure 2 4 Sensing methods Model 2510 Rw VT Thermistor P lt Rw A 2 Wire Connections Model 2510 f VT Thermistor B 4 Wire Connections 4 wire sensing Due to the limitations of the 2 wire method the 4 wire connection method shown in Figure 2 4B is recommended for sensors lt 1kQ With this configuration the test current T is forced through the thermistor through the F and F wires while the voltage across the thermistor is measured through a second set of wires connected to the S and S sense terminals Although some small current may flow through the sense wires it is usually negligible and can generally be ignored for all practical purposes Since the voltage drop across the sense wires is negligible the voltage measured by the Model 2510 is essentially the same as the voltage across the thermisto
143. e which of several instruments has requested service with the SRQ line Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 7 10 Status Structure Models 2510 and 2510 AT User s Manual Status byte and service request commands The commands to program and read the Status Byte Register and Service Request Enable Register are listed in Table 7 3 For details on programming and reading registers see Programming enable registers page 7 5 and Reading registers page 7 6 NOTE To reset the bits of the Service Request Enable Register to 0 use 0 as the param eter value for the SRE command i e SRE 0 Table 7 3 Status byte and service request enable register commands Command Description Default STB Read Status Byte Register SRE lt NDN gt or lt NRf gt Program the Service Request Enable Register Note lt NDN gt Bxx x Binary format each x 1 or 0 Hx Hexadecimal format x 0 to FF Qx Octal format x 0 to 377 lt NRf gt 0to 255 Decimal format SRE Read the Service Request Enable Register Note CLS and STATus PRESet have no effect on the Service Request Enable Register Programming example set MSS B6 when error occurs The first command of sequence in Table 7 4 enables EAV error available When an invalid command is sent line 4 bits B2 EAV and B6 MSS of the Status Byte Register set to 1 The last command reads the Status Byte Register
144. e3 1kQ RTD 100Q RTD 500 to 9 999e3 Q for 1kX2 or ther thermistor 500 to 3 000e3 2 for 2e4 10kQ ther or 1kQ RTD 5 000e3 to 8 000e4 Q for 10kQ 2e5 100kQ ther thermistor 5 000e4 to 2 000e5 Q for 100kQ thermistor MIN LOW LEV MAX DEF LEVel Query upper protection resistance limit TRIPped Query if upper limit is exceeded 1 yes 0 no LOW Lower resistance limit LEVel n Set lower resistance limit 50 1000 RTD n 1 to 200 Q for 100Q RTD or or ther thermistor 5 to 2 000e3 Q for 1kQ RTD or 5e2 1kQ RTD thermistor 50 to 2 000e4 Q for 10kQ or ther thermistor 500 to 2 000e5 Q for 100kQ 5e3 10kQ ther or thermistor MIN MAX HIGH LEV DEF 5e4 100kQ ther LEVel Query lower resistance limit TRIPped Query if lower limit exceeded 1 yes 0 2 no STATe b Enable disable resistance protection ON 4 ON OFF STATe Query resistance protection state V Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual SCPI Command Reference 10 9 Table 10 5 continued SOURce 1 subsystem commands Command Description Default parameter SCPI SOURce 1 TEMPerature Temperature commands V ATUNe Auto Tune commands Model 2510 AT only 4 LCONSstants Temperature PID loop constants V MSETtle Use minimum settling time criteria V GAIN Query temperature gain constant V
145. eMeter command messages and up to 20 times for data returned by the Source Meter response messages The speed of readings sent over the GPIB is also increased NOTE With the 488 1 protocol selected you will still use SCPI commands to program the SourceMeter Operation differences between the two protocols are discussed in this appendix Selecting the 488 1 protocol Perform the following steps to select the 488 1 protocol Press MENU to display the MAIN MENU Place the cursor on COMMUNICATION and press ENTER to display the COMMUNICATIONS SETUP menu 3 Place the cursor on GPIB and press ENTER to display the present GPIB address 4 Press ENTER to display the GPIB PROTOCOL menu 5 Place the cursor on 488 1 and press ENTER 6 Use the EXIT key to back out of the menu structure Ne When switching between the SCPI protocol and 488 1 protocol the instrument does not reset The GPIB protocol setting is saved in EEPROM and the unit will power up with that selected protocol The GPIB protocol cannot be changed over the bus However there is a query command to determine the presently selected protocol When the 488 1 protocol is selected the mes sage exchange protocol MEP disables Therefore if you use the following query to request the state of MEP you will know which protocol is enabled SYSTem MEP STATe If a 1 is returned MEP is enabled and the SCPI protocol is selected A 0 indicates that MEP is di
146. emper ature and function When USER is selected a D and 5 must also be user programmed see below Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 30 SCPI Command Reference Models 2510 and 2510 AT User s Manual RANGe n SENSe 1 TEMPerature RTD RANGe n Set RTD resistance range Parameters n 0 to 1000 Set RTD resistance range 100 or 1000 MINimum 0 MAXimum 1000 DEFault 100 Query RANGe Query sensor resistance range Description This command programs the temperature sensor resistance range It affects only RTD sensor types Nominal ranges are 100 and 1000 ALPHa n SENSe 1 TEMPerature RTD ALPHa n Program RTD sensor alpha Parameters n 0 to 0 01 RTD o coefficient MINimum 0 MAXimum 0 01 DEFault 0 00385 Query ALPHa Query RTD coefficient Description This command programs the RTD temperature sensor amp coefficient for the USER type RTD sensor NOTE See Sensor coefficients page 4 14 BETA n SENSe 1 TEMPerature RTD BETA n Program RTD sensor beta Parameters n 0to1 RTD B coefficient MINimum 0 MAXimum 1 DEFault 0 111 Query BETA Query RTD B coefficient Description This command programs the RTD temperature sensor f coefficient for the USER type RTD sensor Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manu
147. epot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 7 3 7 4 Status Structure Models 2510 and 2510 AT User s Manual Clearing registers and queues When the Model 2510 is turned on the bits of all registers in the status structure are cleared reset to 0 and the two queues are empty Commands to reset the event and event enable registers and the Error Queue are listed in Table 7 1 In addition to these com mands any enable register can be reset by sending the 0 parameter value with the individ ual command to program the register NOTE SYSTem PRESet and RST have no effect on status structure registers and queues Table 7 1 Common and SCPI commands to reset registers and clear queues Commands Description Ref To Reset Registers CLS Reset all bits of the following event registers to 0 Note 1 Standard Event Register Operation Event Register Measurement Event Register Questionable Event Register STATus PRESet Reset all bits of the following enable registers to 0 Note 1 Operation Event Enable Register Measurement Event Enable Register Questionable Event Enable Register To Clear Error Queue CLS Clear all messages from Error Queue Note 2 STATus QUEue CLEar Clear messages from Error Queue Note 3 SYSTem ERRor CLEar Clear messages from Error Queue Note 3 Notes 1 The Standard Event Enable Register is not reset by STATus PRESet or CLS Send the
148. equence eese C 6 Figure C 3 Command codes eese neret C 11 E Example Programs Figure E 1 Setpoint tolerance temperature sweep see E 4 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com List of Tables 1 Getting Started Table 1 1 Display examples inire teret HR REIR ts 1 13 Table 1 2 Display messages sess 1 14 Table 1 3 Factory front panel default settings sess 1 17 Table 1 4 Main mMenu iseset M 1 19 Table 1 5 Temperature configuration menu eee 1 23 Table 1 6 Voltage source configuration menu esee 1 24 Table 1 7 Current source configuration menu eee 1 24 Table 1 8 Resistance configuration menu eene 1 25 Table 1 9 Output configuration menu eene 1 26 Table 1 10 Setpoint tolerance configuration menu eeeeeee 1 26 3 Basic Operation Table 3 1 Temperature configuration menu eee 3 4 Table 3 2 Voltage source configuration menu see 3 5 Table 3 3 Current source configuration menu esee 3 5 Table 3 4 Resistance configuration menu sees 3 7 Table 3 5 Output configuration menu seeseeeeeeenee 3 8 Table 3 7 Setpoint adjustment ranges sssseeeeeeene 3 9 Table 3 6 Setpoint tolerance config
149. equence of the Model 2510 to obtain the status byte a k a serial poll byte B6 is the RQS bit See Serial polling and SRQ page 7 9 for details on using the serial poll sequence When using the STB command Table 7 3 to read the status byte B6 is the MSS bit Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Status Structure 7 9 Service request enable register The generation of a service request is controlled by the Service Request Enable Register This register is programmed by you and is used to enable or disable the setting of bit B6 RQS MSS by the Status Summary Message bits BO B2 B3 B4 B5 and B7 of the Status Byte Register As shown in Figure 7 3 the summary bits are logically ANDed amp with the corresponding enable bits of the Service Request Enable Register When a set 1 summary bit is ANDed with an enabled 1 bit of the enable register the logic 1 output is applied to the input of the OR gate and therefore sets the MSS RQS bit in the Status Byte Register The individual bits of the Service Request Enable Register can be set or cleared by using the SRE common command To read the Service Request Enable Register use the SRE query command The Service Request Enable Register clears when power is cycled or a parameter value of 0 is sent with the SRE command i e SRE 0 The commands to pro gram and read th
150. er by the controller or other devices depending on the direction of data transfer The following is a description of each command Each command is sent by setting the corresponding bus line true REN Remote Enable REN is sent to set up instruments on the bus for remote opera tion When REN is true devices will be removed from the local mode Depending on device configuration all front panel controls except the LOCAL key if the device is so equipped may be locked out when REN is true Generally REN should be sent before attempting to program instruments over the bus EOI End or Identify EOI is used to positively identify the last byte in a multi byte transfer sequence thus allowing data words of various lengths to be transmitted easily IFC Interface Clear IFC is used to clear the interface and return all devices to the talker and listener idle states ATN Attention The controller sends ATN while transmitting addresses or multiline commands SRQ Service Request SRQ is asserted by a device when it requires service from a controller Universal multiline commands Universal commands are those multiline commands that require no addressing All devices equipped to implement such commands will do so simultaneously when the commands are transmitted As with all multiline commands these commands are transmitted with ATN true LLO Local Lockout LLO is sent to the instrument to lock out the LOCAL key and th
151. er s Manual SCPI Command Reference 10 15 Read display DATA DISPlay WINDow 1 DATA Read top display DISPlay WINDow2 DATA Read bottom display Description These query commands are used to read what is currently being dis played on the top and bottom displays After sending one of these com mands and addressing the Model 2510 to talk the displayed data message or reading will be sent to the computer Define TEXT messages DATA a DISPlay WINDow 1 TEXT DATA lt a gt Define message top display DISPlay WINDow2 TEXT DATA lt a gt Define message bottom display Parameters a ASCII characters for message Types String aa a or aa a Indefinite Block 0aa a Definite Block XYaa a where Y number of characters in message Up to 20 for top display Up to 32 for bottom display X number of digits that make up Y 1 or 2 Query DATA Query the defined text message Description These commands define text messages for the display A message can be as long as 20 characters for the top display and up to 32 characters for the bottom display A space is counted as a character Excess message characters result in an error See ASCII display values page 10 17 An indefinite block message must be the only command in the program message or the last command in the program message If you include a command after an indefinite block message on the same line it will be treated as part of the message and
152. erforms an INITiate and a FETCh Identical to MEASure Requests latest readings from unit Acquiring readings FEICh Description This query command requests the latest post processed readings stored in the sample buffer After sending this command and addressing the Model 2510 to talk the readings are sent to the computer This com mand does not affect the instrument setup This command does not trigger control measure operations it simply requests the last available readings Note that this command can repeat edly return the same readings Until there are new readings this com mand continues to return the old readings The readings that are acquired depend on which data elements are selected see FORMat Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual SCPI Signal Oriented Measurement Commands 9 3 subsystem Data elements page 10 21 and what the instrument is presently programmed to control and measure Measure readings take priority over source readings and functions not sourced or measured are assigned the NAN not a number value of 9 91e37 NOTE The FETCh command is automatically asserted when the READ or MEASure command is sent MEASure function Parameters Description function CURRent DC Measure Peltier DC current POWer Measure Peltier power RESistance DC Measure Peltier DC
153. eseseceseeeeeceseeeeeeeseeeeeeeneeees 1 9 Line frequency setting esee 1 9 Fuse replacement seen 1 10 Display oe iet eene eret e reta me eR Le 1 10 Display format 1 10 Display readings eeeeeseeseeseeeeeeeeennennenes 1 11 Temperature function readings ssss 1 11 Voltage function readings sees 1 11 Current function readings eese 1 11 Resistance function readings sesssss 1 12 Reading form t eerte tam orti 1 12 Display exat ples 4e ttem tenete 1 13 Display Messages einer rettet eene dide 1 14 ON OFF mdiCcator rete eti tenente 1 15 EDIT Keys 52 trennt ertt tear tree did eno 1 15 Status and error messages ssssseeeeeeeee 1 15 Front panel tests 1 eec erret t reed eno 1 15 Default Settilps crece recreate rte ec expe tet tenete 1 16 Saving and restoring user Setups see 1 16 SAVING SCHIPS A 1 16 Restoring setups 0 eee eeeeeeeseeeseeseeeseeseeeaeeseeeaeeseeens 1 16 Power on configuration eseeeeeeeeee 1 16 Factory default settings ee 1 16 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com A nM 1 19 Mur 1 19 Rules to navigate menus seesseeeeeee 1 21 Configuration menus
154. estoring setups 1 Press the MENU key select SAVESETUP then press ENTER 2 Select RESTORE then press ENTER 3 Select the setup position 0 to 4 to restore then press ENTER to complete the process Power on configuration You can also define which of the stored setups factory default or user the instrument assumes as the power on configuration as follows Press the MENU key select SAVESETUP then press ENTER 2 Select POWERON then press ENTER 3 From the SET POWER ON DEFAULT menu choose the power on configuration BENCH or GPIB see below or USER SETUP NUMBER 4 Ifyou chose to use a user setup as the power on configuration select the user setup number then press ENTER Factory default settings There are two sets of factory defaults BENCH front panel and GPIB remote For front panel operation BENCH and GPIB defaults are the same and are summarized in Table 1 3 You can restore these default conditions as follows 1 Press the MENU key select SAVESETUP then press ENTER 2 Select RESET then press ENTER 3 Select BENCH or GPIB defaults then press ENTER to complete the process See the SCPI reference tables in Section 10 for remote default information Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Table 1 3 Factory front panel default settings Getting Started Setting Front panel BENCH and GPIB default
155. faults Description These commands are used to control PID autotuning for minimum over shoot criteria See Section 4 The GAIN DER and INT queries request the autotune loop constant values while the TRAN command transfers constants as default values Query tau and lag values SOURcel 1 TEMPerature ATUNe TAU Query tau value SOURce 1 TEMPerature ATUNe LAG Query lag constant Description These queries are used to query the autotune tau and lag values Set temperature start and stop values SOURce 1 TEMPerature ATUNe STARt n Set start temperature SOURce 1 TEMPerature ATUNe STOP n Set stop temperature Description These commands are used to control the start and stop temperatures for PID autotuning See Section 4 Parameters n 50 to 225 C 223 15 to 498 15K 58 to 437 F Query STARt Query start temperature STOP Query stop temperature Description These commands are used to set the start and stop temperatures for the autotune procedure The Model 2510 AT will use these values to deter mine the correct loop constants Initiate autotune SOURce 1 TEMPerature ATUNe INITiate Initiate autotune Description This command is used to initiate the autotune process You must first set the start and stop temperatures before starting the process as described in Section 4 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual
156. ff When finished turn the output off by pressing the ON OFF OUTPUT key The OUTPUT indicator light will turn off to show the output is off Basic remote control measure procedure Use the following procedure to perform the basic control measure operations via remote See Section 10 for command details and Appendix E for an example program NOTE The following procedure assumes that the Model 2510 is already connected to the thermoelectric cooler and temperature sensor as explained in Inputloutput connections page 2 2 Step 1 Restore defaults Send the following command to restore defaults RST See Table 1 3 in Section 1 Step 2 Select function Send the SOUR FUNC command to select the desired control function For example to select the temperature function send the following command SOUR FUNC TEMP Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 3 12 Basic Operation Models 2510 and 2510 AT User s Manual Step 3 Configure selected function Send the commands to program temperature units protection limits sensor type sensor parameters and PID loop constants For example the following commands configure the temperature function UNIT TEMP CEL Celsius temperature limits SOUR TEMP PROT 100 Upper temperature limit 100 SOUR TEMP PROT LOW 10 Lower temperature limit 10 TEMP TRAN RTD Select RTD temperature sensor TEMP RTD TYPE PT 100 Select PT100
157. formation Status register structure Sequential or overlapped commands Operation complete messages See Appendix C Cannot enter an invalid address Address changes and bus resets Determine by SYSTem POSetup See Section 3 2048 bytes None All queries Common Commands and SCPI None See Table D 2 Contained in SCPI command subsystems tables see Table 10 1 through Table 10 10 Block display messages 32 characters max See Section 6 Programming syntax See Section 6 Programming syntax None See Section 10 FORMat subsystem See Section 8 Common Commands See Service Manual Not applicable Not applicable See Section 8 Common Commands Not applicable Not applicable See Section 8 Common Commands See Section 8 Common Commands See Section 7 Status Structure All are sequential except INIT OPC OPC and WAIT see Section 8 Common Commands Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com D 3 D 4 IEEE 488 and SCPI Conformance Information Models 2510 and 2510 AT User s Manual Table D 2 Coupled commands Command Also changes SENS TEMP RTD TYPE SENS TEMP RTD ALPHa except for USER type SENS TEMP RTD BETA SENS TEMP RTD DELTa SENS RES CURR or SENS TEMP CURR SENS RES CURR AUTO to OFF SENS TEMP CURR AUTO to OFF SOUR CLE IMM OUTP STAT to OFF REN G
158. g Reading Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 20 SCPI Command Reference Models 2510 and 2510 AT User s Manual IEEE 754 single precision format REAL 32 or SREal will select the binary IEEE 754 single precision data format Figure 10 2 shows the normal byte order format for each data element For example if three valid elements are specified the data string for each reading conversion is made up of three 4 byte data blocks Note that the data string for each reading conversion is preceded by a 2 byte header that is the binary equivalent of an ASCII sign and 0 NOTE This model terminates the binary data string with LF EOI If your program is set to terminate on CR andlor LF data transfer may terminate prematurely because one or more data bytes has a CR or LF value To avoid the problem set your program to terminate on EOI only Figure 10 2 IEEE 754 single precision data format 32 data bits Header Byte 1 Byte 2 Byte 3 s sign bit 0 positive 1 negative e exponent bits 8 f fraction bits 23 Normal byte order shown For swapped byte order bytes sent in reverse order Header Byte 4 Byte 3 Byte 2 Byte 1 The header and terminator are sent only once for each READ During binary transfers never un talk the Model 2510 until after the data is read input to the computer Also to avoid erratic operation the readings of the data string
159. g above provides the key press code in numeric order The queue for the KEY query command can only hold one key press When KEY is sent over the bus and the Model 2510 is addressed to talk the key press code number for the last key pressed either physi cally or with KEY is sent to the computer The key press code number for the last key pressed either physically or with key is sent to the computer Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 52 SCPI Command Reference Models 2510 and 2510 AT User s Manual Read version of SCPI standard VERSion SYSTem VERSion Read SCPI version This query command is used to read the version of the SCPI standard Description being used by the Model 2510 Example code 1996 0 The above response message indicates the version of the SCPI standard Reset timestamp RESet SYSTem TIME RESet Reset timestamp This action command is used to reset the absolute timestamp to 0 sec onds The timestamp also resets to 0 seconds every time the Model 2510 is turned on Note that time information can be returned with the READ and MEAS queries by specifying a time element with the FORMat ELEMents command see FORMat subsystem page 10 19 Description 2 wire 4 wire sense mode RSENse lt b gt SYSTem RSENse lt b gt Control 4 wire 2 wire sensing Parameters lt b gt 1 or ON Enable 4 wire sensor sense mode 0 o
160. g point SOUR TEME LCON GAIN gain Set manual PID gain constant e SOUR TEME LCON DER derivative Set manual PID derivative constant e SOUR TEME LCON INT integral Set manual PID integral constant Also you can use the TAU and LAG queries to request the corresponding Tau and Lag constant values Autotune complete Your can program the Model 2510 AT to generate an SRQ when the autotune process is complete by setting bit 7 in both the Operation Event Enable and Service Request Enable registers See Section 7 for details Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 4 14 PID Control Concepts Models 2510 and 2510 AT User s Manual Sensor coefficients Thermistor coefficients The thermistor sensor coefficients A B and C linearize the thermistor temperature resistance curve and are related using the Steinhart and Hart equation as follows A B InR C InR Where T Temperature K R Thermistor resistance ohms A B C Thermistor sensor coefficients These coefficients should be set to values specified by the thermistor manufacturer See Configuring temperature page 3 3 for programming details RTD coefficients In a similar manner RTD sensor coefficients o D and 6 linearize the RTD temperature resistance curve using the Callendar Van Dusen equation in the following manner 3 E T T T T Rp Ry Roel T 155 Ko F
161. gt stat oper enab Operation Condition Register Idle Atc Arm Trig Cal B15 B11 B10 B988 TE PNE B4 B3 B2 B1 BO a5 Atc i ai B15 B11 B10 6988 B7 B6 BS B4 B3 B2 B1 Operation Event Register Idle E Arm Trig Cal O peration B15 B11 B10 B9B9 B7 B6 B5 B4 B3 B2 B1 BO Event Enable Idle In idle state Logical AND Register Arm Waiting for arm event OR Logical OR Trg Waiting for trigger event Cal Calibrating Atc Autotune complete Model 2510 AT only Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 7 14 Status Structure Models 2510 and 2510 AT User s Manual Measurement event register The used bits of the Measurement Event Register shown in Figure 7 6 are described as follows Bit BO Over Temperature OT Set bit indicates an over temperature condition Bit B1 Under Temperature UT Set bit indicates an under temperature condition Bit B2 Over Voltage OV Set bit indicates an over voltage condition Bit B3 Current Overload CO Set bit indicates a current overload condition Bit B4 Over Resistance OR Set bit indicates an over resistance condition Bit B5 Under Resistance UR Set bit indicates an under resistance condition Bit B6 Reading Available RAV Set bit indicates that a reading was
162. gton Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Remote Operations 6 3 The RS 232 interface is a serial interface Programmable aspects of this interface include the following factory default settings are shown in parentheses e Baud rate 9600 e Data bits 8 Parity none e Terminator CR Flow control none An interface is selected and configured from the COMMUNICATION option of the Main Menu see Main menu page 1 19 For details on the programmable aspects of the inter faces see Primary address page 6 6 and RS 232 interface operation page 6 6 NOTE When changing interface selections the Model 2510 performs a power on reset To check and or change options of the selected interface you must re enter the menu structure GPIB operation This section contains information about GPIB standards bus connections and primary address options See Appendix C for more GPIB information GPIB standards The GPIB is the IEEE 488 instrumentation data bus with hardware and programming standards originally adopted by the IEEE Institute of Electrical and Electronic Engineers in 1975 The Model 2510 conforms to these standards EEE 488 1 1987 TEEE 488 2 1992 The above standards define a syntax for sending data to and from instruments how an instrument interprets this data what registers should exist to record the state of the instru ment and a group of comm
163. guration the digital output line must be set LO to energize the relay and the maximum sink current is 500mA Figure 5 2 Sink operation Model 2510 External p7 Rela sve Pin 7 PEL ND I 1 m I 1 To Other l i Circuits I 1 I 1 1 ML ES I I i Maximum Sink Current 500mA i Pin 9 Renee ty Digital I O Port Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 5 4 Digital I O Port and Output Enable Models 2510 and 2510 AT User s Manual Source operation Figure 5 3 shows the basic output configuration for source operation In this case the external relay coil is connected between the digital output line pins 1 to 4 and ground pin 9 With this configuration the digital output line must be set HI to energize the relay and the maximum source current is 2mA Figure 5 3 Source operation Model 2510 45V o Maximum Source Current 2mA Pin 9 External ME i Relay Digital 1 O Port Controlling digital output lines Set digital output line logic levels from the front panel as follows Press the MENU key Select GENERAL then press ENTER Select DIGOUT then press ENTER Using the EDIT keys set the digital output parameter to the desired decimal value Table 5 1 then press ENTER For example to set the output lines to L H H H set the digital output parameter value to 7 then press ENTER TON E 5 Press EXIT to return to
164. gure 4 6 System response to step function Temp Tfinal E Sao SS Se Sk SS eu Tinitial Time 0 Tlag In this case T is positive but it could also be negative Temperature responses of a dif ferent mathematical model will cause the autotune function to fail or give unpredictable results Once the Lag and Tau times are extracted from the sampled data taken from the voltage step response the tuning constants can be calculated Inherent limitations that will cause the tuning function to fail include A system Tau time of less than 1 second or greater than 470 seconds A system Lag time greater than 0 6 x Tau Ambient temperature outside the range protection limits programmed by the user e Ambient temperature movements during the autotune sequence of greater than 1 C Noisy temperature measurements Reaching any temperature current or voltage limits during the final autotune volt age step test Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 4 10 PID Control Concepts Models 2510 and 2510 AT User s Manual Practical autotune considerations There are several practical considerations to take into account when using autotune Each of these is outlined below TEC module gain The gain of a TEC module varies with operating temperature and increases with increas ing temperature This variation can be as much as 7 1 over the operational temperature range of the
165. h the DISPLAY TOGGLE LOCAL key Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Getting Started 1 11 Display readings Display readings depend on the selected function as discussed below Temperature function readings The temperature function displays measured and setpoint temperatures You can use the DISPLAY TOGGLE key to cycle among Peltier PEL voltage Peltier current e Peltier power Peltier resistance Sensor RT resistance NOTE The terms Peltier and thermoelectric cooler TEC are used interchange ably throughout this manual Voltage function readings The voltage function displays measured and setpoint TEC voltages DISPLAY TOGGLE key cycles among Temperature T Peltier current Peltier power Peltier resistance e Sensor resistance Current function readings The current function displays measured and setpoint TEC currents and you can use the DISPLAY TOGGLE key to cycle among Temperature Peltier voltage e Peltier power e Peltier resistance Sensor resistance Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 1 12 Getting Started Models 2510 and 2510 AT User s Manual Resistance function readings The resistance function displays measured RTD and thermistor sensor resistances as well as setpoint resistances and y
166. he listener idle state Place the unit in the listener idle state by sending UNL Unlisten addressing it to talk or sending IFC Interface Clear command over the bus SRQ You can program the instrument to generate a service request SRQ when one or more errors or conditions occur When this indicator is on a service request has been generated This indicator stays on until the serial poll byte is read or all the conditions that caused SRQ have been cleared See Section 7 Status Structure for more information DISPLAY TOGGLE LOCAL key The DISPLAY TOGGLE LOCAL key cancels the remote state and restores local opera tion of the instrument Pressing the DISPLAY TOGGLE LOCAL key also turns off the REM indicator and returns the display to normal if a user defined message was displayed If the LLO Local Lockout command is in effect the DISPLAY TOGGLE LOCAL key is also inoperative For safety reasons the OUTPUT key will still be active in LLO Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Remote Operations 6 11 General bus commands General commands are those commands such as DCL that have the same general mean ing regardless of the instrument Table 6 3 lists the general bus commands which are described in detail in Appendix C Table 6 3 General bus commands Command Effect on Model 2510 REN Goes into remote whe
167. he table below which lists the various subsystems and reference tables Reference Subsystem Description table DISPlay Control read front panel display attributes Table 10 1 FORMat Specify remote data formats Table 10 2 OUTPut Turn source output on off control output enable line Table 10 3 SENSe Control measurement function operating modes Table 10 4 SOURce 1 Control source function operating modes Table 10 5 SOURce2 Set Digital I O port line logic levels Table 10 6 STATus Control and read status registers Table 10 7 SYSTem Control system functions such as line frequency Table 10 8 Trigger Control instrument triggering Table 10 9 UNIT Set temperature units Table 10 10 General notes Brackets are used to denote optional character sets These optional characters need not be included in the program message Also do not include brackets in pro gram messages Angle brackets gt are used to indicate parameter type Do not use angle brackets in the program message The Boolean parameter b is used to enable or disable an instrument operation ON or 1 enables the operation and OFF or 0 disables the operation Upper case characters indicate the short form version for each command word Default parameter Listed parameters are both RST and SYSTem PRESet defaults unless otherwise noted SCPI A check mark V indicates that the command and its parameters are SCPI confirmed An unmarked comm
168. hese elements shown in Figure 10 1 are explained as follows NOTE An overflow reading reads as 9 9E37 VOLTage This element provides the TEC voltage measurement CURRent This element provides the TEC current measurement RESistance This element provides the TEC resistance measurement TEMPerature This element provides the TEC temperature measurement TSENSor This element provides the sensor temperature measurement TIME A timestamp is available to reference each group of readings to a point in time The relative timestamp operates as a timer that starts at zero seconds when the instrument is turned on or when the relative timestamp is reset SYSTem TIME RESet The timestamp for each reading sent over the bus is referenced in seconds to the start time STATus Each and every measurement performed by the Model 2510 has a STATus word associated with it This STATus word is accessible via the FORMat ELEMents STATus element Internally the Model 2510 maintains this STATus element as a 16 bit integer Each bit within this integer provides status information about a particular process asso ciated with the construction of the measurement However when que ried the decimal equivalent is returned The format of the STATus element is as follows Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 22 SCPI Command Reference Models 2510 and 2510 AT User s
169. hich is also frequently referred to as the GPIB General Purpose Interface Bus was designed as a parallel transfer medium to optimize data transfer with out using an excessive number of bus lines In keeping with this goal the bus has only eight data lines that are used for both data and with most commands Five bus manage ment lines and three handshake lines round out the complement of bus signal lines A typical set up for controlled operation is shown in Figure C 1 Generally a system will contain one controller and a number of other instruments to which the commands are given Device operation is categorized into three operators controller talker and listener The controller does what its name implies it controls the instruments on the bus The talker sends data while a listener receives data Depending on the type of instrument any particular device can be a talker only a listener only or both a talker and listener Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual IEEE 488 Bus Overview C 3 Figure C 1 IEEE 488 bus configuration TO OTHER DEVICES DEVICE 1 ABLE TO TALK LISTEN AND CONTROL COMPUTER DATA BUS DEVICE 2 ABLE TO TALK AND LISTEN DATA BYTE 2510 TRANSFER CONTROL DEVICE 3 ONLY ABLE TO LISTEN PRINTER GENERAL INTERFACE MANAGEMENT DEVICE 4 ONLY
170. iated instrumentation Although some instruments and accessories would normally be used with non hazardous voltages there are situations where hazardous conditions may be present This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury Read and follow all installation operation and maintenance information carefully before us ing the product Refer to the manual for complete product specifications If the product is used in a manner not specified the protection provided by the product may be impaired The types of product users are Responsible body is the individual or group responsible for the use and maintenance of equipment for ensuring that the equip ment is operated within its specifications and operating limits and for ensuring that operators are adequately trained Operators use the product for its intended function They must be trained in electrical safety procedures and proper use of the instrument They must be protected from electric shock and contact with hazardous live circuits Maintenance personnel perform routine procedures on the product to keep it operating properly for example setting the line voltage or replacing consumable materials Maintenance procedures are described in the manual The procedures explicitly state if the operator may perform them Otherwise they should be performed only by service personnel
171. imum 3e 6 MAXimum 2 5e 3 DEFault 2 5e 3 100Q range 8 333e 4 1kQ range le 4 10kQ range 3 33e 5 100kQ range Query CURRent Query sensor current Description This command programs the temperature sensor transducer excitation current It affects only thermistor and RTD sensor types Nominal sen sor currents are 3 3e 6 1e 5 3 33e 5 le 4 8 333e 4 and 2 5e 3 AUTO b SENSe 1 RESistance CURRent AUTO lt b gt Enable disable auto sensor current Parameters b or ON Enable auto sensor current 0 or OFF Disable auto sensor current Query AUTO Query auto sensor current state Description This command enables or disables the auto sensor current mode When the auto current mode is enabled the sensor current is set as follows Range Current 100 2 RTD or thermistor 2 5mA 1kQ RTD or thermistor 833 3uA 10kQ thermistor 100pA 100kQ thermistor 33 3pA TRANsducer lt name gt SENSe 1 RESistance TRANsducer lt name gt Select resistance temperature sensor Parameters lt name gt THERmistor Select thermistor sensor RTD Select RTD sensor Query TRANsducer Query sensor type Description This command selects the temperature sensor for the resistance func tion Only thermistor and RTD sensor types are available for the resis tance function Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 28 SCPI Command Reference Models 2510 and 2510 AT User s Manual RANGe n
172. ion high limit Protection low limit Protection state Sensor current Sensor current auto state Sensor type Sense mode Thermistor range Proportional constant Integral constant Derivative constant Output On Off Digital I O enable line Peltier cooler ground connect mode Digital I O port output value Display format Setpoint tolerance percentage Window size 0A 2A 10 20 0 1000 100Q RTD or thermistor 1kQ 1kQ RTD or thermistor 10kQ 10kQ thermistor 100kQ 100kQ thermistor 200Q 100Q RTD or thermistor 2kQ 1kQ RTD or thermistor 20kQ 10kQ thermistor 200kQ 100kQ thermistor 50Q 100Q RTD or thermistor 500Q 1kQ RTD or thermistor 5k 10kQ thermistor 50kQ 100kQ thermistor Enabled 2 5mA 100Q range 833 3pA 1kQ range 100pA 10kQ range 33 3pA 100kQ range On Thermistor 2 wire 10kQ 20 0 6 0 Off Off Disabled 15 Engineering units 0 5 5 BENCH defaults are the same as SYSTem PRESet defaults Section 10 GPIB defaults are the same as RST defaults Section 8 Not affected by BENCH or GPIB RESET Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Getting Started 1 19 Menus The following paragraphs discuss the main menu function configuration menus and rules to navigate menus Main menu Use the MENU key to access the Main Menu to select configure
173. ions are configured from the front panel menus Use the follow ing rules to navigate through these configuration menus A menu item is selected by placing the cursor on it and pressing ENTER Cursor position is denoted by the blinking menu item or option The EDIT left and right arrow keys control cursor position A displayed arrow on the bottom line indicates there are one or more additional items or messages to select from Use the appropriate EDIT cursor key to display them A numeric value is changed by placing the cursor on the digit to be changed and using the EDIT A and V keys A change is executed only when ENTER is pressed Entering an invalid parameter generates an error and the entry is ignored However entering an out of range value too small or too large selects the lower or upper limit respectively The EXIT key is used to back out of the menu structure Any change that is not entered is cancelled when EXIT is pressed Configuration menus There are five configuration menus that can be accessed by pressing the CONFIG key fol lowed by the appropriate key T V I R OUTPUT or EDIT Configuration menus on the following pages are available for these operating functions Temperature CONFIG T Table 1 5 Voltage source CONFIG V Table 1 6 Current source CONFIG I Table 1 7 Resistance CONFIG R Table 1 8 Output CONFIG OUTPUT Table 1 9 Setpoint tolerance CONFIG EDIT Table 1 10 NOTE See Configuring
174. its TEMPerature lt name gt Program temperature units Celsius name C CELI Fl FARIK TEMPerature Query temperature units DISPlay subsystem The DISPlay subsystem is used to control the Model 2510 front panel two line display via remote The top larger display has 20 characters while the bottom smaller display has 32 characters Commands are summarized in Table 10 1 Control display ATTRibutes DISPlay WINDow 1 ATTRibutes Query attributes top display DISPlay WINDow2 ATTRibutes Query attributes bottom display Description This query command is used to determine which characters on the dis play are blinking and which are not The response message provides that status of each character position for the specified display The primary display consists of 20 characters and the secondary display consists of 32 characters 1 Character is blinking 0 Character is not blinking For example assume the following menu is displayed with the SAVESETUP option blinking MAIN MENU SAVESETUP COMMUNICATION CAL gt The response message for disp attr top display will result in 20 zeroes as follows 00000000000000000000 The response message for disp wind2 attr bottom display will dis play ones at the character positions for SAVESETUP as follows 11111111100000000000000000000000 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT Us
175. leads and cables from the instru ment before replacing the line fuse CAUTION For continued protection against fire or instrument damage replace the fuse only with the type and rating listed If the instrument repeat edly blows fuses locate and correct the cause of the problem before replacing the fuse 1 The fuse is located in a drawer adjacent to the AC receptacle Figure 1 2 At the bottom of the fuse drawer is a small tab At this location use a small bladed screw driver to pry the fuse drawer open 2 Slide the fuse drawer out to gain access to the fuse Note that the fuse drawer does not pull all the way out of the input module 3 Snap the fuse out of the drawer and replace it with the same type 250V 2 5A slow blow 5 x 20mm Keithley part number FU 106 2 5 4 Push the fuse drawer back into the input module Display Display format The Model 2510 display is used primarily to program setpoint values and display mea sured readings Annunciators which are located along the top of the reading message dis play indicate various states of operation as covered previously in Front panel summary page 1 5 On power up the top primary display shows the function being controlled by the PID loop when the output is on with the output off OFF is displayed The bottom display is used for setpoint values on the left and alternate reading information for the selected function on the right that can be selected wit
176. llegal with storage active EE Standard Event 4 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Status and Error Messages B 7 Table B 1 continued Status and error messages Number Error message Event Status register Bit 801 Not permitted with OUTPUT on EE Standard Event 4 802 OUTPUT blocked by OUTPUT EE Standard Event 4 Enable 803 Not permitted with OUTPUT off EE Standard Event 4 804 OUTPUT blocked by Over Temp EE Standard Event 4 805 OUTPUT blocked by Under Temp EE Standard Event 4 806 Invalid while taking reading EE Standard Event 4 807 OUTPUT blocked by Over Ohms EE Standard Event 4 808 OUTPUT blocked by Under Ohms EE Standard Event 4 810 V protection must be set EE Standard Event 4 811 I protection must be set EE Standard Event 4 812 Start temperature must be set EE Standard Event 4 813 Stop temperature must be set EE Standard Event 4 814 Over temperature must be set EE Standard Event 4 815 Under temperature must be set EE Standard Event 4 816 Insufficient temperature step EE Standard Event 4 820 Autotune AMB System Exceeds HILIM EE Standard Event 4 821 Autotune AMB System Exceeds LOLIM EE Standard Event 4 822 Autotune Atmpt Temp Rise Too Small EE Standard Event 4 823 Autotune System Temp Never Settled EE Standard Event 4 824 Autotu
177. lt conditions PRESet SYSTem PRESet Description Return to SYSTem PRESet defaults This command returns the instrument to states optimized for front panel operation SYSTem PRESet defaults are listed in Table 10 1 through Table 10 10 and are the same as front panel BENCH defaults See Section 1 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual SCPI Command Reference 10 49 POSetup SYSTem POSetup lt name gt Program power on defaults Parameters name RST Power up to RST defaults PRESet Power up to SYSTem PRESet defaults SAVO Power up to setup stored at memory location 0 SAVI Power up to setup stored at memory location 1 SAV2 Power up to setup stored at memory location 2 SAV3 Power up to setup stored at memory location 3 SAVA Power up to setup stored at memory location 4 Query POSetup Query power on setup Description This command is used to select the power on defaults With RST selected the instrument powers up to the RST default conditions With PRES selected the instrument powers up to the SYStem PRESet default conditions Default conditions are listed in the Table 10 1 through Table 10 10 With the SAVO 4 parameters specified the instrument powers on to the setup that is saved in the specified location using the SAV command Select power line frequency setting LFRequency freq SYSTem LFRequency fre
178. measure procedure 3 10 Step 1 Select function eee 3 10 Step 2 Configure function sse 3 10 Step 3 Adjust setpoint sese 3 10 Step 4 Set current limit 3 10 Step 5 Turn output on sese 3 11 Step 6 Observe the display essess 3 11 Step 7 Turn output off sees 3 11 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Basic remote control measure procedure ss 3 11 Step 1 Restore defaults essss 3 11 Step 2 Select function sese 3 11 Step 3 Configure selected function 3 12 Step 4 Program setpoint seseeeeeerere 3 12 Step 5 Set current limit eee 3 12 Step 6 Turn output on see 3 12 Step 7 Request readings sese 3 12 Step 8 Turn output off essen 3 13 Protection AIDS e creto erret RE Pere eher Ene 3 13 Temperature protection limits eee 3 14 Voltage protection limit eene 3 14 Current protection limit esee 3 14 Resistance protection limits eeeeeene 3 14 Voltage and current limit operating boundaries 3 15 Setpoint tolerance eere reete rri re rasei ainan 3 15 heu RUN 3 16 Operation E
179. ment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 48 SCPI Command Reference ENABle lt list gt Models 2510 and 2510 AT User s Manual STATus QUEue ENABle lt list gt Enable messages for Error Queue Parameters lt list gt numlist where numlist is a specified list of messages that you wish to enable for the Error must be in parentheses Query ENABle Query list of enabled messages Description On power up all error messages are enabled and will go into the Error Queue as they occur Status messages are not enabled and will not go into the queue This command is used to specify which messages you want enabled Messages not specified will be disabled and prevented from entering the queue DiSable lt list gt STATus QUEue DlISable lt list gt Disable messages for Error Queue Parameters lt list gt numlist where numlist is a specified list of messages that you wish to disable for the Error Queue in parentheses Query DISable Query list of disabled messages Description On power up all error messages are enabled and will go into the Error Queue as they occur Status messages are not enabled and will not go into the queue This command is used to specify which messages you want disabled Disabled messages are prevented from going into the Error Queue SYSTem subsystem The SYSTem subsystem contains miscellaneous commands that are summarized in Table 10 8 Defau
180. mmary 8 2 Autotune 4 11 Command words 6 12 Commands Case sensitive 6 14 General bus 6 11 IEEE 488 Bus C 7 Program messages 6 16 Queries 6 14 Status byte and SRQ 7 2 7 10 Syntax 6 12 Common commands 8 1 Common SCPI errors B 7 Configuration AC resistance 3 6 AC resistance measurement 3 3 Current 3 5 Current measurement 3 3 DC resistance 3 6 DC resistance measurement 3 3 Digital I O port 5 2 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Digital output 5 3 Output 3 8 Output enable 5 6 Setpoint tolerance 3 8 Source meter output 3 8 Temperature 3 3 Temperature measurement 3 3 Voltage 3 5 Voltage measurement 3 3 Conformance information IEEE 488 and SCPI D 1 Connections 2 wire 2 2 2 wire input output 2 2 2 5 4 wire 2 3 4 wire input output 2 3 2 5 GPIB 6 4 Input output 2 2 RS 232 6 8 TEC heating and cooling 2 4 Connector Digital I O 1 7 GPIB 1 7 INPUT OUTPUT 1 3 Input output 1 7 2 2 Line power 1 7 RS 232 1 7 Trigger link 1 7 Contact information 1 2 Control display 10 14 Controlling digital output lines 5 4 Current Configuration 3 5 Menus 1 24 Protection limits 3 14 Readings 1 11 Data bits and parity 6 7 DC resistance 9 3 Configuration 3 6 DCL device clear 6 12 Define TEXT messages 10 15 Digital I O port 1 7 5 2 Display 1 10 Examples 1 13 Format 1 10 Messages 1 14 Readings 1 11 DISPlay subsystem 10 14 DISPLAY
181. n address is H36 H36 H16 H20 In a similar manner the talk address is obtained by ORing the pri mary address with H40 With the present example the talk address derived from a pri mary address of 16 decimal would be H56 42H56 H16 H40 The IEEE 488 standards also include another addressing mode called secondary address ing Secondary addresses lie in the range of H60 H7F Note however that many devices including the Model 2510 do not use secondary addressing Once a device is addressed to talk or listen the appropriate bus transactions take place For example if the instrument is addressed to talk it places its data string on the bus one byte at a time The controller reads the information and the appropriate software can be used to direct the information to the desired location Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual IEEE 488 Bus Overview C 5 Bus lines The signal lines on the IEEE 488 bus are grouped into three different categories data lines management lines and handshake lines The data lines handle bus data and com mands while the management and handshake lines ensure that proper data transfer and operation takes place Each bus line is active low with approximately zero volts represent ing a logic 1 true The following paragraphs describe the operation of these lines Data lines The IEEE 488 bus
182. n next addressed to listen IFC Goes into talker and listener idle states LLO LOCAL key locked out GTL Cancel remote restore Model 2510 front panel operation DCL Returns all devices to known conditions SDC Returns Model 2510 to known conditions GET Initiates a trigger SPE SPD Serial polls the Model 2510 REN remote enable The remote enable command is sent to the Model 2510 by the controller to set up the instrument for remote operation Generally the instrument should be placed in the remote mode before you attempt to program it over the bus Setting REN true does not place the instrument in the remote state You must address the instrument to listen after setting REN true before it goes into remote IFC interface clear The IFC command is sent by the controller to place the Model 2510 in the local talker lis tener idle states The unit responds to the IFC command by cancelling front panel TALK or LSTN lights if the instrument was previously placed in one of these states Note that this command does not affect the status of the instrument Settings data and event registers are not changed To send the IFC command the controller need only set the IFC line true for a minimum of 100ys LLO local lockout Use the LLO command to prevent local operation of the instrument After the unit receives LLO all of its front panel controls except OUTPUT OFF are inoperative In this state pressing LOCAL will not restore control t
183. n the high limit Temperature function SPOint lt n gt SOURce 1 TEMPerature SPOint n Program temperature setpoint Parameters lt n gt 50 to 225 C Set temperature setpoint 223 15 to 498 15K 58 to 437 F MINimum 50 C 223 15K 58 F MAXimum 225 C 498 15K 437 F DEFault 25 C 298 15K TIEF Query SPOint Query temperature setpoint Description This command programs the temperature setpoint for the temperature function This value is the temperature at which the Model 2510 will maintain system temperature when the temperature function is enabled The setpoint cannot exceed the temperature protection limits Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual SCPI Command Reference 10 39 LCONstants SOURce 1 TEMPerature LCONstants GAIN n Program proportional constant SOURce 1 TEMPerature LCONstants DERvative n Program derivative constant SOURce 1 TEMPerature LCONstants INTegral n Program integral constant Parameters GAIN lt n gt 0 to 1e5 Set proportional constant value MINimum 0 MAXimum le5 DEFault 20 0 DERivative n 0 to le5 Set derivative constant value MINimum 0 MAXimum le5 DEFault 0 0 INTegral lt n gt Oto le5 Set integral constant value MINimum 0 MAXimum le5 DEFault 0 6 Query GAIN Query proportional constant DERivative Query derivative constant INTegral Query integral
184. ne V Limit Exceeded EE Standard Event 4 825 Autotune HILIM Temp Exceeded EE Standard Event 4 826 Autotune Cannot to find 63 Temp EE Standard Event 4 827 Autotune Cannot find Lagwin Temp EE Standard Event 4 828 Autotune Cannot to find 20 Temp EE Standard Event 4 829 Autotune Cannot to find 80 Temp EE Standard Event 4 830 Autotune Temperature Runaway EE Standard Event 4 831 Autotune Ambient Unstable EE Standard Event 4 832 Autotune I Limited Exceeded EE Standard Event 4 833 Autotune LOLIM Temp Exceeded EE Standard Event 4 834 Autotune Errant Readings EE Standard Event 4 835 Autotune TEC Resis Too High EE Standard Event 4 900 Internal System Error EE Standard Event 4 1 EE Error Event SE Status Event SYS System Error Event Use following queries to read status registers Standard Event ESR Operation Event STAT OPER Measurement Event STAT MEAS Questionable Event STAT QUES N Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com B 8 Status and Error Messages Models 2510 and 2510 AT User s Manual Eliminating common SCPI errors There are three SCPI errors that occur more often than any others 113 Undefined header 410 Query INTERRUPTED e 420 Query UNTERMINATED The following paragraphs discuss the most common causes for these errors and methods for avoiding them 113
185. nected to power line ground through the ground wire in the power cord Failure to use a grounded outlet may result in personal injury or death due to electric shock 4 Turn on the instrument by pressing the front panel power switch to the on 1 position Power up sequence On power up the Model 2510 performs self tests on its EPROM and RAM and momen tarily lights all segments and annunciators If a failure is detected the instrument momen tarily displays an error message and the ERR annunciator turns on If the instrument passes the self tests the firmware revision levels are displayed For example REV A01 A02 where AOI is the main board ROM revision A02 is the display board ROM revision Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Getting Started 1 9 Also displayed is the line frequency 50 or 60Hz If the wrong frequency is displayed it can be set manually as covered below The communication interface status is briefly dis played If the IEEE 488 bus is the presently selected interface the identification message will include the primary address For example if the primary address is 15 factory default the IEEE Addr 15 message is displayed The Model 2510 does not support a secondary address If the RS 232 interface is selected the RS 232 message is displayed After the power up sequence the instrument g
186. nector for connections Keithley part number CS 846 NOTE The Model 2510 assumes that a positive output current is a heating current 2 wire connections Figure 2 1 shows basic 2 wire signal connections Note that the OUTPUT F force termi nals are connected to the thermoelectric cooler TEC while the INPUT F terminals are connected to the temperature sensor 2 wire sensor connections are recommended for Thermistor and RTD sensors with 21kQ resistance Both AD590 current and LM335 voltage type solid state sensors Figure 2 1 2 wire input output connections RTD Thermistor or Solid State Temperature Sensor RT Thermistor or RTD sensor LM335 Voltage solid state sensor AD590 Current solid state sensor Mating Connector F F LE F Output Input Model 2510 Note These connections assume positive current heats TEC Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Connections 2 3 4 wire connections Figure 2 2 shows basic 4 wire signal connections In this case the OUTPUT F force and S Kelvin sense terminals are connected to the thermoelectric cooler while the INPUT F and S terminals are connected to the temperature sensor 4 wire sensor connections are recommended for RTD and thermistor sensors with lt 1kQ resistance This type of connec tion will eliminate lead resistance errors See Sensing co
187. nectors can be ordered from Keithley Cables and adapters Models 7007 1 and 7007 2 shielded GPIB cables Connect the Model 2510 to the GPIB bus using shielded cables and connectors to reduce electromagnetic interference EMI The Model 7007 1 is 1m long the Model 7007 2 is 2m long Model 7009 5 shielded RS 232 cable Connects the Model 2510 to a computer serial port using shielded cable and connectors to reduce EMI Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 1 4 Getting Started Models 2510 and 2510 AT User s Manual Rack mount kits Model 4288 1 single fixed rack mount kit Mounts a single Model 2510 in a standard 19 inch rack Model 4288 2 side by side rack mount kit Mounts two instruments Models 182 428 486 487 2000 2001 2002 2010 2015 2016 2400 2410 2420 2430 2510 6430 6517 7001 side by side in a standard 19 inch rack Model 4288 3 side by side rack mount kit Mounts a Model 2510 and a Model 199 side by side in a standard 19 inch rack Model 4288 4 side by side rack mount kit Mounts a Model 2510 and a 5 25 inch instrument Models 195A 196 220 224 230 263 595 614 617 705 740 775 etc side by side in a standard 19 inch rack Model 4288 5 dual fixed rack mounting kit Mounts a Model 2510 and another 31 2 inch high instrument Model 182 428 486 487 2000 2010 2400 2410 2420 2430 6430 or 7001 side by side in a
188. ng the information The three handshake lines are DAV DATA VALID The source controls the state of the DAV line to indicate to any listening devices whether or not data bus information is valid Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com C 6 IEEE 488 Bus Overview Models 2510 and 2510 AT User s Manual NRFD Not Ready For Data The acceptor controls the state of NRFD It is used to signal to the transmitting device to hold off the byte transfer sequence until the accepting device is ready NDAC Not Data Accepted NDAC is also controlled by the accepting device The state of NDAC tells the source whether or not the device has accepted the data byte The complete handshake sequence for one data byte is shown in Figure C 2 Once data is placed on the data lines the source checks to see that NRFD is high indicating that all active devices are ready At the same time NDAC should be low from the previous byte transfer If these conditions are not met the source must wait until NDAC and NRFD have the correct status If the source is a controller NRFD and NDAC must be stable for at least 100nsec after ATN is set true Because of the possibility of a bus hang up many control lers have time out routines that display messages in case the transfer sequence stops for any reason Once all NDAC and NRFD are properly set the source sets DAV low indicating to accept ing devices
189. normal display Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Digital I O Port and Output Enable Table 5 1 Digital output line settings Decimal OUT 4 OUT 3 OUT2 OUT 1 value L L L L 0 L L L H 1 L L H L 2 L L H H 3 L H L L 4 L H L H 5 L H H L 6 L H H H 7 H L L L 8 H L L H 9 H L H L 10 H L H H 11 H H L L 12 H H L H 13 H H H L 14 H H H H 15 L Low Gnd H High 243V Via remote send SOUR2 TTL lt Decimal_value gt See SOURce2 subsystem in Section 10 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 5 5 5 6 Digital I O Port and Output Enable Models 2510 and 2510 AT User s Manual Output enable line The Digital I O Port provides an output enable line for use with a test fixture activate switch When properly used the OUTPUT of the Model 2510 will turn OFF when the lid of the test fixture is opened Overview When the output enable line is active see below the output of the Model 2510 cannot be turned on unless the enable line is pulled low through a switch to ground as shown in Figure 5 44 If the lid of the test fixture opens Figure 5 4B the switch opens and the enable line goes high turning the OUTPUT of the Model 2510 OFF The output can only be turned back on by first closing the lid of the test fixture and then pressing the O
190. ns summary of installed options RCL NR f Recall command Returns the Model 2510 to the user saved setup RST Reset command Returns the Model 2510 to the RST default condi tions SAV lt NRf gt Save command Saves the present setup as the user saved setup SRE lt NRf gt Service request enable command Programs the Service Request Enable Register SRE Service request enable query Reads the Service Request Enable Register STB Status byte query Reads the Status Byte Register TRG Trigger command Sends a bus trigger to the Model 2510 TST Self test query Performs a checksum test on ROM and returns the result WAI Wait to continue command Wait until all previous commands are executed Status commands are covered in Status Structure Section 7 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Common Commands 8 3 Command reference IDN identification query Reads identification code The identification code includes the manufacturer model number serial number and firm ware revision levels and is sent in the following format KEITHLEY INSTRUMENTS INC MODEL 2510 xxxxxxx yyyyy zzzzz b Where 2510 is the model number XXXXXXX is the serial number yyyyy zzzzz is the firmware revision levels of the digital board ROM and display board ROM including date and time of build b is the board
191. nsiderations page 2 5 Figure 2 2 4 wire input output connections RTD or Thermistor Temperature Sensor INPUT S Mating Connector INPUT F OUTPUT F F S S F F S S Output Input Model 2510 IEEE 488 e T EC ENABLE DIG 1 0 no e Note These connections TRIGGER s e assume positive current heats TEC LINE FUSE SLOWBLOW 2 5A 250V LINE RATING 100 240VAC 50 60 HZ SOVA MAX Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 2 4 Connections Models 2510 and 2510 AT User s Manual Reversing TEC connections The Model 2510 assumes that a positive TEC current is a heating current To configure your system so that a positive current is a cooling current reverse your TEC connections as shown in Figure 2 3 In this case OUTPUT F and S are connected to TEC while out put F and S are connected to TEC Figure 2 3 TEC connections for positive current cooling operation Model 2510 or 2510 AT OUTPUT Peltier Thermistor TEC Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Connections 2 5 Sense selection 4 wire connections minimize the detrimental effects of lead resistance by sourcing the test current through one set of wires OUTPUT and INPUT F terminals and measuring the voltage across the device thro
192. nt Program B coefficient Program C coefficient Set thermistor current AUTO 3 3pA 10pA 33 3pA 100A 833 3pA 2 5mA Select 2 WIRE or 4 WIRE sense mode Program RTD sensor parameters Select PT385 PT3916 PT100 D100 F100 USER type Program USER o p Set RTD range 100 or 10009 Set RTD current AUTO 3 3pA 10pA 33 3pA 100pA 833 3pA 2 5mA Select 2 WIRE or 4 WIRE sense mode Program current solid state sensor settings Program offset K Program slope K A Program voltage solid state sensor settings Program offset K Program slope K A Select temperature units C Kelvin F Program PID loop constants for temperature control Set proportional constant Set integral constant Set derivative constant Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 1 24 Getting Started Models 2510 and 2510 AT User s Manual Table 1 6 Voltage source configuration menu Configuration menu item Description PROTECTION Set voltage protection limit PID Program PID loop constants for voltage control PROPORTIONAL Set proportional constant INTEGRAL Set integral constant DERIVATIVE Set derivative constant Table 1 7 Current source configuration menu Configuration menu item Description PROTECTION Set current protection limit PID Program PID loop constants for current control PROPORTIONAL Set proportional constant I
193. nt to talk will generate an error 420 Query UNTERMI NATED as well Valid query following an invalid command This situation can occur when you send multiple commands or queries program message units within one command string program message When the Model 2510 detects an error in a program message unit it discards all further program message units until the end of the string for example SENS VOLT SOUR FUNC In the above program message the program message unit SENS VOLT will gen erate error 113 Undefined header and the Model 2510 will discard the second program message unit SOUR FUNC even though it is a valid query Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com IEEE 488 Bus Overview Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com C 2 IEEE 488 Bus Overview Models 2510 and 2510 AT User s Manual Introduction Basically the IEEE 488 bus is a communication system between two or more electronic devices A device can be either an instrument or a computer When a computer is used on the bus it serves to supervise the communication exchange between all the devices and is known as the controller Supervision by the controller consists of determining which device will talk and which device will listen As a talker a device will output information and as a listener a device will receive information To
194. o does not apply to fuses software non rechargeable batteries damage from battery leakage or problems arising from normal wear or failure to follow instructions THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUD ING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE THE REMEDIES PROVIDED HEREIN ARE BUYER S SOLE AND EXCLUSIVE REMEDIES NEITHER KEITHLEY INSTRUMENTS INC NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF ITS INSTRUMENTS AND SOFTWARE EVEN IF KEITHLEY INSTRUMENTS INC HAS BEEN ADVISED IN ADVANCE OF THE POSSIBILITY OF SUCH DAMAGES SUCH EXCLUDED DAM AGES SHALL INCLUDE BUT ARE NOT LIMITED TO COSTS OF REMOVAL AND INSTALLATION LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY PERSON OR DAMAGE TO PROPERTY KEITHLEY Keithley Instruments Inc 28775 Aurora Road Cleveland Ohio 44139 440 248 0400 Fax 440 248 6168 1 888 KEITHLEY 534 8453 e www keithley com Sales Offices BELGIUM Bergensesteenweg 709 B 1600 Sint Pieters Leeuw 02 363 00 40 Fax 02 363 00 64 CHINA Yuan Chen Xin Building Room 705 12 Yumin Road Dewai Madian Beijing 100029 e 8610 6202 2886 Fax 8610 6202 2892 FINLAND Tiet j ntie 2 02130 Espoo Phone 09 54 75 08 10 Fax 09 25 10 51 00 FRANCE 3 all e des Garays 91127 Palaiseau C dex 01 64 53 20 20 Fax 01 60 11 77 26 GERMANY Landsberger Strasse
195. o the front panel The GTL command restores control to the front panel Cycling power will also cancel local lockout Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 6 12 Remote Operations Models 2510 and 2510 AT User s Manual GTL go to local Use the GTL command to put a remote mode instrument into local mode The GTL com mand also restores front panel key operation DCL device clear Use the DCL command to clear the GPIB interface and return it to a known state Note that the DCL command is not an addressed command so all instruments equipped to implement DCL will do so simultaneously When the Model 2510 receives a DCL command it clears the Input Buffer and Output Queue cancels deferred commands and clears any command that prevents the processing of any other device command A DCL does not affect instrument settings and stored data SDC selective device clear The SDC command is an addressed command that performs essentially the same function as the DCL command However since each device must be individually addressed the SDC command provides a method to clear only selected instruments instead of clearing all instruments simultaneously as is the case with DCL GET group execute trigger GET is a GPIB trigger that is used as an arm event to control operation SPE SPD serial polling Use the serial polling sequence to obtain the Model 2510 serial poll byte
196. ocol MEP F 3 Messages Error and status 6 9 B 2 Exchange protocol 6 18 Program 6 16 Response 6 18 Status and error 1 15 Ohms AC 2 7 Open and shorted lead status indications 3 18 Operating boundaries 3 15 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Operation Front panel GPIB 6 9 Overview 3 2 Remote Local toggle key 6 10 Setpoint tolerance 3 17 Temperature sensors 3 18 Options 1 3 Output Configuration 3 8 Menus 1 26 Output enable line 5 6 OUTPUT sensing 2 5 OUTPut subsystem 10 25 Output enable line control 10 25 Turn source on or off 10 25 OUTPut subsystem commands 10 4 Overview 1 4 Panel Front 1 5 Rear 1 7 PID autotuning 4 6 Autotune limitations 4 9 Autotune operation 4 6 Command summary 4 11 Fine tuning 4 10 Practical considerations 4 10 Response options 4 6 PID control chara cteristics 4 5 PID control concepts 4 1 PID tuning 4 5 Power up sequence 1 8 Program messages 6 16 Programming syntax 6 12 Protection limits 3 13 Queues 7 2 7 19 Clearing 7 4 Error 7 20 Output 7 19 Rack mount kits 1 4 Read display 10 15 READ 9 4 Reading Format 1 12 Readings Current 1 11 Resistance 1 12 Temperature 1 11 Voltage 1 11 Rear panel 1 7 Rear panel summary 1 7 Registers Clearing 7 4 Condition 7 17 Event 7 17 Event enable 7 18 Measurement event 7 14 Operation event 7 13 Programming 7 5 Programming and reading 7 5 Questionable event 7 16 Reading 7
197. oes to its normal display state with the out put off ON OFF OUTPUT indicator light off With the output off the OFF message is displayed System identification To obtain the serial number and revision information use the MENU GENERAL SERIAL selection The top line displays the serial number the bottom line displays the firmware revision and date of calibration You can then press the p key to display SCPI revision level and main board revision levels You can also use IDN via remote see Section 8 Line frequency setting The power line frequency and line frequency setting should be the same or readings may be noisy You can manually set the line frequency from the front panel as follows Set the line frequency from the front panel as follows Press the MENU key to display MAIN MENU 2 Using the right arrow key select AD CTRL then press ENTER to display A D CONTROLS 3 Note that LINE FREQUENCY is displayed then press ENTER to display the LINE FREQUENCY menu Place the cursor on 50Hz or 60Hz and press ENTER 5 Press EXIT to return to normal display Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 1 10 Getting Started Models 2510 and 2510 AT User s Manual Fuse replacement A rear panel fuse protects the power line input of the Model 2510 If the line fuse needs to be replaced perform the following steps WARNING Disconnect the line cord and all test
198. om Error Queue Notes 1 Commands in this subsystem are not affected by RST and SYSTem PREset The effects of cycling power CLS and STATus PRESet are explained by the following notes 2 Event Registers Power up and CLS clears all bits STATus PRESet has no effect 3 Enable Registers Power up and STATus PRESet clears all bits CLS has no effect Accepts the SCPI 1995 0 mandated non decimal numeric format H Q or 4B 4 Error Queue Power up and CLS clears all bits of the registers 5 Error Queue Messages Power up clears list of messages CLS and STATus PRESet have no effect 6 Register Query Commands The format for the response messages ASCII hexadecimal octal or binary depends on which data format is presently selected See the FORMat SREGister command Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual SCPI Command Reference 10 13 Table 10 8 SYSTem subsystem commands Default Command Description parameter SCPI SYSTem Path to SYSTem subsystem KEY lt n gt Simulate key press V KEY Query the last pressed key V PRESet Return to SYST PRES BENCH defaults V POSetup Select power on setup RST PRESet or SAVO 1 or 2 POSetup Returns the power on user setup VERSion Query rev level of SCPI standard 1996 0 4 ERRor V NEXT Returns the latest error code
199. om line V STATe lt b gt Enables 1 ON or disables 0 OFF the display of Note v the user defined text on the bottom line of the dis play STATe Returns the state of the user defined message V DATA Returns the 32 characters that are displayed on the V bottom line Note RST or SYSTem PRESet have no effect on display data or state Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 4 SCPI Command Reference Models 2510 and 2510 AT User s Manual Table 10 2 FORMat subsystem commands Default Command Description parameter SCPI FORMat BORDer name Specify byte order when transferring binary Note V data lt name gt NORMal SWAPped BORDer Query byte order V DATA lt type gt lt length gt Specify data format used when transferring ASCii V numeric data Valid formats are ASCii REAL 32 and SREal ASCii is the only per mitted input format regardless of this setting DATA Query data format v ELEMents lt item list Specify desired data item TEMPerature TEMP VOLT VOLTage CURRent POWer RESistance CURR POW TSENsor TIME and STATus RES TSEN TIME STATus SREGister type Type ASCii HEXadecimal OCTal or ASCii V BINary Selects the output response format of the Status Model registers SREGister Query output response format SOURce2 type Type ASCii HEXadecimal OCTal or ASCii BINa
200. ommand Description Default STATus STATus Subsystem QUEue Read Error Queue Note 1 NEXT Read and clear oldest error status code and message ENABle lt list gt Specify error and status messages for Error Queue Note 2 ENABle Read the enabled messages DISable lt list gt Specify messages not to be placed in queue Note 2 DISable Read the disabled messages CLEar Clear messages from Error Queue SYSTem SYSTem Subsystem ERRor Read Error Queue Note 1 NEXT Read and clear oldest error status code and message ALL Read and clear all errors status code and message COUN Read the number of messages in queue CODE Code numbers only NEXT Read and clear oldest error status code only ALL Read and clear all errors status codes only CLEar Clear messages from Error Queue Notes 1 Power up and CLS empties the Error Queue STATus PRESet has no effect 2 Power up enables error messages and disables status messages CLS and STATus PRESet have no effect Programming example read error queue The following command reads the error queue STAT QUE Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Common Commands Command summary Lists the IEEE 488 2 common commands used by the Model 2510 Command reference Provides a detailed reference for all common commands except for those associated with the status str
201. ommands and the non SCPI commands implemented by the Model 2510 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Table D 1 IEEE 488 documentation requirements IEEE 488 and SCPI Conformance Information Requirements Description or reference 1 2 3 4 5 a b c d e 6 7 8 9 10 1 12 13 14 5 16 17 18 19 20 21 22 23 IEEE 488 Interface Function Codes Behavior of Model 2510 when the address is set outside the range 0 30 Behavior of Model 2510 when valid address is entered Power On Setup Conditions Message Exchange Options Input buffer size Queries that return more than one response message unit Queries that generate a response when parsed Queries that generate a response when read Coupled commands Functional elements required for SCPI commands Buffer size limitations for block data Syntax restrictions Response syntax for every query command Device to device message transfer that does not follow rules of the standard Block data response size Common Commands implemented by Model 2510 Calibration query information Trigger macro for DDT Macro information Response to IDN identification Storage area for PUD and PUD Resource description for RDT and RDT Effects of RST RCL and SAV TST in
202. on commands The Model 2510 also conforms to this standard e SCPI 1996 0 Standard Commands for Programmable Instruments This standard defines a command language protocol It goes one step farther than IEEE 488 2 1992 and defines a standard set of commands to control every programmable aspect of an instrument Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 6 4 Remote Operations Models 2510 and 2510 AT User s Manual GPIB connections To connect the Model 2510 to the GPIB bus use a cable equipped with standard IEEE 488 connectors as shown in Figure 6 1 Figure 6 1 IEEE 488 connector To allow many parallel connections to one instrument stack the connectors Two screws are located on each connector to ensure that connections remain secure Figure 6 2 shows a typical connecting scheme for a multi unit test system Figure 6 2 IEEE 488 connections Instrument Instrument Instrument Controller Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Remote Operations To avoid possible mechanical damage stack no more than three connectors on any one unit 6 5 NOTE To minimize interference caused by electromagnetic radiation use only shielded IEEE 468 cables Available shielded cables from Keithley are Models 7007 1 and 7007 2 To connect the Model 2510 to the IEEE
203. on or off Control or measurements cannot be performed while the source is off Turning the source off places the Model 2510 in the idle state Output enable line control STATe lt b gt OUTPut 1 ENABIe STATe b Control enable line Parameters lt b gt 0 or OFF Turn off enable line 1 or ON Turn on enable line Query STATe Query state of enable Description This command is used to activate or inactivate the hardware output enable line When activated the source cannot be turned on unless the output enable line pin 8 of the rear panel Enable Digital I O connec tor is pulled to a logic low state When the enable line goes to a logic high state the source turns off See Section 5 Digital I O Port and Output Enable for details using the enable line with a test fixture When disabled the logic level on the enable line has no effect on the output state of the source TRIPped OUTPut 1 ENABle TRIPped Description This query command is used to determine if the output enable line state has been tripped The tripped condition 1 means that the source can be turned on enable line at logic low level A 0 will be returned if the source cannot be turned on enable line at logic high level Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 26 SCPI Command Reference Models 2510 and 2510 AT User s Manual SENSe1 subsystem The SENSel subsystem is used
204. onal control characteristics Setpoint Cooler Temperature Temperature C Increasing Gain 0 50 100 150 Time s Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 4 4 PID Control Concepts Models 2510 and 2510 AT User s Manual Proportional derivative PD control The stability and overshoot problems that occur when a proportional controller is used at high gain can be minimized by adding a term proportional to the time derivative of the error signal as follows Ww K Te T Ky x T Here K is the derivative gain Proportional integral derivative PID control Although PD control deals well with the overshoot and ringing problems associated with proportional control it does not cure the problem with steady state error However it is possible to eliminate this error while using relatively low proportional gain by adding an integral term to the control function as follows d W Kx c Ty Ky XO Ty K x To Ty LI Here K the integral gain parameter is sometimes known as the controller reset level This form of function is known as proportional integral differential or PID control for which the Model 2510 is optimized The effect of the integral term is to change the TEC power until the time averaged value of the temperature error is zero Figure 4 3 shows the result of adding the integral term to the control function To summarize e Kp the prop
205. ontrol setpoints Adjustment 3 8 Tolerance 3 8 3 15 TEC temperature Control methods 4 2 Control model 4 2 Temperature Configuration 3 3 Menus 1 23 Protection limits 3 14 Readings 1 11 Temperature control methods 4 2 On off 4 3 Proportional P 4 3 Proportional derivative PD 4 4 Proportional integral derivative PID 4 4 Temperature control model 4 2 Temperature sensors 3 18 Terminator 6 7 Tests Front panel 1 15 Thermistor coefficients 4 14 Thermistor sensor ranges 3 18 Trigger subsystem 10 54 Abort source measure cycle 10 54 Initiate control measure cycle 10 54 Trigger subsystem commands 10 13 UNIT subsystem 10 54 Voltage Configuration 3 5 Protection limits 3 14 Readings 1 11 Warranty 1 2 Warranty information 1 2 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Service Form Model No Serial No Date Company List all control settings describe problem and check boxes that apply to problem Q Intermittent Q Analog output follows display Q Particular range or function bad specify L IEEE failure Q Obvious problem on power up L Batteries and fuses are OK Q Front panel operational U All ranges or functions are bad Q Checked all cables Display or output check one Q Drifts Q Unable to zero Q Unstable Q Overload L Will not read applied input Q Calibration only Q Certificate of calibration required L Data required
206. oor performance will result at both operating points more overshoot and ringing at high temperatures slower response at lower temperatures PID fine tuning If the autotune algorithm does not yield the desired response use the PID loop constants created by the autotune algorithm as a starting point and modify them as needed to obtain the desired performance The three PID loops constants perform the following functions Kp Proportional gain constant This constant pushes the system to its final value Lower numbers create a slower response while larger numbers help increase the response speed Values too large may cause the system to oscillate and or become unstable Ki Integral gain constant This constant is responsible for how fast the system settles to its final value as well as how much overshoot occurs Low values create a long settling tail with minimal overshoot while large values settle much more Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual quickly but with larger overshoot Values too large may cause the system to PID Control Concepts become unstable and most likely oscillate Kd Derivative gain constant This constant helps control the slew rate 4 11 dynamics of the output response waveform Small values allow the temperature to move as quickly as possible while large values control how r
207. or RS 232 5432 emm 9876 Rear Panel Connector Table 6 1 RS 232 connector pinout Pin number Description 1 Not used 2 TXD transmit data 3 RXD receive data 4 Not used 5 GND signal ground 6 Not used 7 RTS ready to send 8 CTS clear to send 9 Not used NOTE CTS and RTS are tied together Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Remote Operations 6 9 Table 6 2 provides pinout identification for the 9 pin DB 9 or 25 pin DB 25 serial port connector on the computer PC Table 6 2 PC serial port pinout Signal DB 9 pin number DB 25 pin number DCD data carrier detect RXD receive data TXD transmit data DTR data terminal ready GND signal ground DSR data set ready RTS request to send CTS clear to send RI ring indicator wo 00 10 tnde utb 2 N N HAF AAGNWOH Front panel GPIB operation This section describes aspects of the front panel that are part of GPIB operation including messages status indicators and the LOCAL key Error and status messages During operation various error and status messages associated with IEEE 488 program ming may be displayed see Appendix B The instrument can be programmed to generate an SRQ and command queries can be performed to check for specific error conditions GPIB status indicators The REM remote T
208. or B coefficient MINimum 10 MAXimum 10 DEFault 2 33894e 4 Query B Query thermistor B coefficient Description This command programs the thermistor temperature sensor B coefficient C lt n gt SENSe 1 TEMPerature THERmistor C n Program thermistor sensor C value Parameters lt n gt 10 to 10 thermistor C coefficient MINimum 10 MAXimum 10 DEFault 8 85983e 8 Query C Query thermistor C coefficient Description This command programs the thermistor temperature sensor C coefficient Solid state sensor parameters GAIN n SENSe 1 TEMPerature VSS GAIN n Program voltage sensor gain SENSe 1 TEMPerature ISS GAIN n Program current sensor gain Parameters VSS lt n gt 0 to 9 999e 2 VSS solid state sensor gain V K MINimum 0 MAXimum 9 999e 2 DEFault 1 0e 2 ISS lt n gt 0 to 9 999e 4 ISS solid state sensor gain A K MINimum 0 MAXimum 9 999e 4 DEFault 1 0e 6 Query GAIN Query solid state sensor gain Description These commands program the solid state sensor gain values VSS sets voltage type sensor gain and ISS sets type current sensor gain Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual SCPI Command Reference 10 33 OFFSet lt n gt SENSe 1 TEMPerature VSS OFFSet n Program voltage sensor offset SENSe 1 TEMPerature ISS OFFSet n Program current sensor offset Parameters V
209. ortional constant controls the loop gain e K the integral constant offsets errors e K the derivative constant affects the damping rate Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual PID Control Concepts 4 5 Figure 4 3 PID control characteristics 80 Setpoint Cooler 70 Temperature 60 Temperature C 50 Power W 40 0 50 100 150 200 250 300 Time s PID tuning It will be necessary for you to tune the Model 2510 PID loop controller by trial and error The method for tuning the PID loop outlined below is intended only as a starting point and some experimentation may be required for optimum performance This procedure is based on the assumption that a critically damped system is optimal and that stability and noise performance must be traded for response time See Configuring functions page 3 3 for information on setting up functions including programming the proportional integral and derivative constants covered in these procedures CAUTION This procedure may result in large temperature oscillations during the tuning process that could cause damage to the thermoelectric cooler 1 Adjust the temperature setpoint value Ts to a typical value for thermoelectric cooler and set the Derivative D and Integral T constants to 0 2 Selecta safe value for the maximum TEC power and increase the proportional gain P
210. ou can use the DISPLAY TOGGLE key to cycle among Temperature Peltier voltage Peltier current Peltier power Peltier resistance Reading format Reading information on the top line of the front panel display can be displayed using either engineering units or scientific notation in either fixed or floating point format Use the GENERAL NUMBERS selection of the main MENU to select the display format as discussed under Menus page 1 19 Engineering units example 1 23456pA Scientific notation example 1 23456e 6 See FORMat subsystem page 10 19 for remote reading formats Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Getting Started 1 13 Display examples Typical display examples are shown in Table 1 1 Table 1 1 Display examples Function Display toggle sequence Temperature 025 000 C Setpoint 025 000 C PEL 00 072V 025 000 C Setpoint 025 000 C PEL 0 0030A 025 000 C Setpoint 025 000 C PEL 00 002W 025 000 C Setpoint 025 000 C PEL 002 40Q 025 000 C Setpoint 025 000 C RT 000 04kQ Voltage 01 000V Setpoint 01 000V T 030 630 C 01 000V Setpoint 01 000V PEL 0 3689A 01 000V Setpoint 01 000V PEL 00 368W 01 000V Setpoint 01 000V PEL 002 71Q 01 000V Setpoint 01 000V RT 000 04kQ Current 00 500A Setpoint 00 500A T 033 200 C 00 500A Setpoint
211. parameters 6 13 Query commands essere nennen 6 14 Case Sensitivity eeseesseseeeeeeeeeee eee eene nennen ns 6 14 Leading Colo nerit reet tret tti prinio 6 15 Long form and short form versions sss 6 15 Short form rules es oie tnter 6 15 Program messages eeeeeeeeeeeenee eene eee 6 16 Single command messages esee 6 16 Multiple command messages eee 6 16 Command path rules eere 6 17 Using common and SCPI commands in the same message sse 6 17 Program message terminator PMT 6 17 Command execution rules sse 6 17 Response messages seseeeeeeeeneenem eee 6 18 Sending a response message eseeee 6 18 Multiple response messages eee 6 18 Response message terminator RMT 6 18 Message exchange protocol eseseee 6 18 7 Status Structure OVERVIEW 7 2 Status byte and SRQ eese 7 2 Status register sets essent enne 7 2 uy EE 7 2 Clearing registers and queues seen 7 4 Programming and reading registers esee 7 5 Programming enable registers eese 7 5 Reading tegisters csesescascssscessseusasicscesecensttesecssevocradeeceradis 7 6 Status
212. parate program messages as follows stat oper enab lt NRf gt stat oper enab stat pres In each of the above program messages the path pointer starts at the root command stat and moves down the command levels until the command is executed Multiple command messages You can send multiple command messages in the same program message as long as they are separated by semicolons The following is an example showing two commands in one program message stat oper enab lt NRf gt stat oper enab When the above is sent the first command word is recognized as the root command stat When the next colon is detected the path pointer moves down to the next command level and executes the command When the path pointer sees the colon after the semicolon it resets back to the root level and starts over Commands that are on the same command level can be executed without having to retype the entire command path Example stat oper enab lt NRf gt enab Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Remote Operations 6 17 After the first command enab is executed the path pointer is at the third command level in the structure Since enab is also on the third level it can be typed in without repeating the entire path name Notice that the leading colon for enab is not included in the pro gram message If a colon were include
213. q Select line frequency Parameters lt freq gt 50 50Hz setting 60 60Hz setting Query LFRequency Query line frequency selection Description Use this command to manually select the line frequency setting 50 or 60Hz The line frequency setting should match the power line fre quency or readings may be noisy Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 50 SCPI Command Reference Models 2510 and 2510 AT User s Manual Error queue NOTE See Section 7 for details on the error queue NEXT SYSTem ERRor NEXT Read oldest error code and message Description As error and status messages occur they are placed in the Error Queue The Error Queue is a first in first out FIFO register that can hold up to 10 messages After sending this command and addressing the Model 2510 to talk the oldest message is sent to the computer and is then removed from the queue NOTE The STATus Queue command performs the same function as SYS Tem ERRor NEXT See STATus subsystem page 10 46 ALL SYSTem ERRor ALL Read all errors codes and messages Description This query command is similar to the NEXT command except that all messages in the Error Queue are sent to the computer when the Model 2510 is addressed to talk All messages are removed from the queue COUNEP SYSTem ERRor COUNt Return the number of errors Description After sending this command and add
214. r IEEE 488 INTERFACE Connector for GPIB remote operation Use a shielded cable Model 7007 1 or 7007 2 Ground screw L Allows easy access to chassis ground Fan Internal fan turns on when the internal temperature reaches 50 C Keep ventilation slots free of obstruc tions to avoid overheating Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 1 8 Getting Started Models 2510 and 2510 AT User s Manual Power up Line power connection The Model 2510 operates from a line voltage in the range of 100 to 240V at a frequency of 50 to 60Hz Line voltage and line frequency are automatically sensed Therefore there are no switches to set Before connecting the unit to line power check to be sure the operating voltage in your area is compatible CAUTION Operating the instrument on an incorrect line voltage may cause dam age possibly voiding the warranty Perform the following steps to connect the Model 2510 to line power and turn it on 1 Before plugging in the power cord make sure the front panel POWER switch is in the off 0 position 2 Connectthe female end of the supplied power cord to the AC receptacle on the rear panel 3 Connect the other end of the supplied power cord to a properly grounded AC outlet WARNING The power cord supplied with the Model 2510 contains a separate ground for use with grounded outlets When proper connections are made instrument chassis is con
215. r Vy Vr and more accurate resistance and temperature measurements result from the following resistance calculation V T Ry a Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Connections 2 7 Ground connect mode Ground connect connects output low to sensor measurement ground as shown in Figure 2 5 Without ground connect the output can float up to 10V from sensor measure ment ground Figure 2 5 Ground connect mode Rectifier AC TEC GND Connect Q G i Measurement Circuit Q AC ohms measurement The AC ohms measurement can be used to determine the AC resistance across the OUT PUT F and F terminals This measurement is typically used as a pre test of Peltier static resistance before using PID control The AC ohms measurement can be displayed from the front panel by configuring the resistance function Section 3 and via remote by using the MEAS RES AC query Section 9 As shown in Figure 2 6 the AC ohms command results in a 9 6mA current being pulsed through the DUT in opposite directions so as to eliminate system voltage offset and mini mize temperature change of the Peltier During thermoelectric PID control dynamic DC resistance can be displayed on the front panel display by pressing the DISPLAY TOGGLE key or via remote with the MEAS RES DC query Section 9 Figure 2 6 AC ohms
216. r OFF Disable 4 wire sensing 2 wire mode Query RSENse Query enabled disabled 4 wire sense state Description RSENs enables or disables 4 wire sensing for RTD and thermistor tem perature transducers 4 wire sensing should be used for RTD and ther mistor sensors with lt 1kQ resistance Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual SCPI Command Reference 10 53 Ground connect mode GCONnect lt b gt SYSTem GCONnect lt b gt Control ground connect mode Parameters lt b gt 1 or ON Ground connect enabled 0 or OFF Ground connect disabled Query GCONnect Query ground connect mode Description This command controls the ground connect mode With the ground con nect mode enabled the INPUT and OUTPUT terminals are all inter nally connected to analog common See Section 2 Connections for details The front panel REAR annunciator turns on when ground connect is enabled RS 232 interface NOTE Although these commands are intended for use over the RS 232 they also func tion with the GPIB LOCal SYSTem LOCal Take Model 2510 out of remote Description Normally during RS 232 communications front panel keys are opera tional However the user may wish to lock out front panel keys during RS 232 communications See RWLock page 10 53 This command is used to remove the Model 2510 from the remote state and enables
217. r current ON ON OFF AUTO Query default sensor current state CURRent Query sensor current TRANsducer Select sensor type THERmistor name name THERmistor RTD TRANsducer Query transducer type THERmistor RANGe n Set thermistor resistance range n 0 to 3e5 le4 100 1e3 1e4 165 MIN MAX DEF RANGe Query thermistor resistance range RTD RANGE n Set RTD sensor range n 0 to 1000 100 100 1000 MINI MAX DEF RANGe Query RTD resistance range TEMPerature Path to configure temperature CURRent n Set RTD or thermistor sensor current 2 5e 3 100Q range n 3e 6 to 1e 3 3 3e 6 1e 5 3 33e 5 8 333e 4 1kQ range le 4 8 333e 4 2 5e 3 MIN MAX DEF le 4 10kQ range 3 33e 5 100k range AUTO lt b gt Enable disable auto sensor current ON ON OFF AUTO Query auto default sensor current state CURRent Query sensor current TRANsducer Select transducer sensor type THERmistor lt name gt lt name gt THERmistor RTD VSS ISS TRANsducer Query transducer type RTD Program RTD type and coefficients TYPE name Select RTD sensor type lt name gt PT385 PT385 PT3916 PT100 D100 F100 or USER Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 6 SCPI Command Reference Models 2510 and 2510 AT User s Manual Table 10 4 continued SENSe 1 subsystem commands
218. r limit cannot be set lower than lower limit Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Basic Operation 3 5 Configuring voltage Using Table 3 2 as a guide configure the voltage source as follows ch atl d 6 Press CONFIG then V to access the voltage configuration menu Select PROTECTION then press ENTER Using the EDIT keys set the voltage limit to the desired value then press ENTER Choose PID then press ENTER Program the PROPORTIONAL INTEGRAL and DERIVATIVE constants as required After programming press EXIT as necessary to return to normal display Table 3 2 Voltage source configuration menu Configuration menu item Description PID PROTECTION PROPORTIONAL INTEGRAL DERIVATIVE Set voltage protection limit 0 5 to 10 5V Program PID loop constants for voltage Set proportional constant 0 to 100000 Set integral constant 0 to 100000 Set derivative constant 0 to 100000 Configuring current Using Table 3 3 as a guide configure the current source as follows aoe Se ET 6 Press CONFIG then I to enter the current configuration menu Select PROTECTION then press ENTER Using the EDIT keys set the current limit to the desired value then press ENTER Choose PID then press ENTER Program the PROPORTIONAL INTEGRAL and DERIVATIVE constants as required Press EXI
219. r spill on the instrument Products that consist of a circuit board with no case or chassis e g data acquisition board for installation into a computer should never require cleaning if handled accord ing to instructions If the board becomes contaminated and operation is affected the board should be returned to the factory for proper cleaning servicing Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Table of Contents 1 Getting Started General information essere 1 2 Warranty information sese rere eee 1 2 Contact information eese 1 2 Manual addenda irren 1 2 Safety symbols and terms see 1 2 Inspection iis cie tete etre eee ve Y eve e etaed n 1 3 Options and accessories sssseeeeeene 1 3 INPUT OUTPUT mating connector 1 3 Cables and adapters esee 1 3 Rack mount Kits esee 1 4 Carrying CASE cete ceo nerit tee erae dee ee EP Ee EVE ERE aa 1 4 Product OVELVIEW nic isc eec tette da perte rne E Sede rendre nis 1 4 Front and rear panel familiarization eee 1 5 Front panel summary eere 1 5 Rear panel summary eene 1 7 PowerUp srin ait MH 1 8 Line power connection eese 1 8 Power up sequence esee eene 1 8 System identification cc eecees
220. r to rated accuracies DIMENSIONS WEIGHT 89mm high x 213 mm wide x 370mm deep 3 in x 8 in x 14946 in Bench configuration with handle amp feet 104mm high x 238mm wide x 370mm deep 4 in x 9 in x 14 c in Net Weight 3 8kg 8 38 lbs ENVIRONMENT Operating 0 50 C 70 R H up to 35 C Derate 3 R H C 35 50 C Storage 25 to 65 C Current Output L 13 5V 833 pA 12 40 to 100 C Slope amp offset 0 03 100 nA Solid State Voltage Output Vs 2 5 mA 15 75 V max 42 9 40 to 100 C Slope amp offset 0 03 500 pV MAX VOLTAGE DROP IN INPUT FORCE LEADS 1 volt MAX SENSE LEAD RESISTANCE 100Q for rated accuracy NOTES 1 With remote voltage sense 2 With 10kQ thermistor as sensor 3 Short term stability is defined as 24 hours with Peltier and Model 2510 at 25 C 0 5 C 4 Long term stability is defined as 30 days with Peltier and Model 2510 at 25 C 0 5 C 5 10Hz to 10MHz measured at 5A output into a 2Q load 6 Common mode voltage 0V meter connect enabled connects Peltier low output to thermistor measure circuit ground 0 1 of rdg 0 1Q with meter connect disabled 7 Resistance range 0Q to 200 for rated accuracy 8 Current through Peltier 0 2A 9 Default values shown selectable values of 3uA 10pA 33uA 100pA 833p A 2 5mA Note that tempera ture control performance will degrade at lower currents 10 AC Ohms is a dual pulse
221. rameters GAIN n Program sensor gain scale factor 1 0e 6 lt n gt 0 to 9 999e 4 MIN MAX DEF GAIN Query sensor gain OFFSet n Program sensor offset 0 0 n 999 999 to 999 999 MIN MAX DEF OFFSet Query sensor offset Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual SCPI Command Reference 10 7 Table 10 5 SOURce 1 subsystem commands Command Description Default parameter SCPI SOURce 1 Path to SOURce 1 commands V CLEar V IMMediate Clear source immediately 4 CURRent Program current source 4 LCONSstants Program current PID loop constants GAIN n Set current loop gain 10 0 n 0 to le5 MINI MAX DEF GAIN Query current loop gain DERivative n Set current derivative constant 0 0 n 0 to le5 MINI MAX DEF DERivative Query current derivative constant INTegral n Set current integral constant 20 0 n 0 to le5 MINI MAX DEF INTegral Query current integral constant LEVel V IMMediate V AMPLitude n Set current amplitude 0 0 4 n 5 to 5 A MINI MAX DEF AMPLitude Query current amplitude V FUNCtion Select source function V MODE name Select active source function name TEMPerature 4 VOLTage CURRent TEMPerature RESistance MODE Query active source function 4 RESistance Resistan
222. register sets A typical status register set is made up of a condition register an event register and an event enable register A condition register is a read only register that constantly updates to reflect the present operating conditions of the instrument When an event occurs the appropriate event register bit sets to 1 The bit remains latched to 1 until the register is reset When an event register bit is set and its corresponding enable bit is set as programmed by the user the output summary of the register will set to 1 which in turn sets the summary bit of the Status Byte Register Queues The Model 2510 uses an Output Queue and an Error Queue The response messages to query commands are placed in the Output Queue As various programming errors and sta tus messages occur they are placed in the Error Queue When a queue contains data it sets the appropriate summary bit of the Status Byte Register Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Figure 7 1 Model 2510 status register structure Questionable Questionable Condition Event Register Register 0 Questionable Event Enable Register T wjnj e Calibration Summary OG 20009099 Command Warning RR e Always Zero 15 Standard Event Statu
223. registers Parameters lt name gt ASCii Decimal format HEXadecimal Hexadecimal format OCTal Octal format BINary Binary format Query SREGister Query format for reading status registers Description Query commands are used to read the contents of the status event regis ters This command is used to set the response message format for those query commands When a status register is queried the response message is a value that indicates which bits in the register are set For example if bits B5 B4 B2 B1 and BO of a register are set 110111 the following values will be returned for the selected data format ASCii 55 decimal value HEXadecimal H37 hexadecimal value OCTal Q67 octal value BINary B110111 binary value See Section 7 Status Structure and STATus subsystem page 10 46 for more information Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual SCPI Command Reference 10 25 OUTPut subsystem This subsystem is used to turn the source output on or off and to control the Digital I O port output enable line These commands are summarized in Table 10 3 Turn source on or off STATe b OUTPut 1 STATe b Turn source on or off Parameters b 0 or OFF Turn source off standby 1 or ON Turn source on operate Query OUTPut Query state of source Description This command is used to turn the source output
224. rence Table 10 5 continued SOURce 1 subsystem commands Models 2510 and 2510 AT User s Manual Command Description Default parameter SCPI SOURce 1 TEMPerature PROTection Set temperature protection 4 HIGH Upper temperature limit V LEVel n Set upper temperature limit 50 0 C V n 50 to 250 C 223 15 to 523 15K 323 15K 58 to 482 F MINI MAX DEF 122 F LEVel Query upper protection temperature limit V TRIPped Query if upper limit is exceeded 1 yes V 0 no LOW Lower temperature limit 0 0 V LEVel n Set lower temperature limit 0 C v n 50 to 250 C 223 15 to 523 15K 273 15K 58 to 482 F MIN MAX DEF 32 F LEVel Query lower protection temperature limit V TRIPped Query if lower limit exceeded 1 yes V 0 z no STATe lt b gt Enable disable temperature protection ON ON OFF STATe Query temperature protection state SPOint lt n gt Program temperature setpoint 25 C V n 50 to 225 C 223 15 to 498 15K 298 15K 58 to 437 F MINI MAX DEF TI F SPOint Query temperature setpoint V Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Table 10 5 continued SOURce 1 subsystem commands SCPI Command Reference 10 11 Command Description Default parameter SCPI
225. resistance RESistance AC Measure Peltier AC resistance TEMPerature Measure Peltier temperature TSENsor Measure temperature sensor VOLTage DC Measure Peltier DC voltage This command combines other signal oriented measurement commands to perform a one shot measurement and acquire the reading Note that if a function is not specified MEASure the measurement will be done on the function that is presently selected When this command is sent the following commands execute in the order that they are pre sented INITiate FETCh The INITiate command starts operation by taking the instrument out of idle After all control measure operations are completed the Model 2510 goes back into idle at which time the FETCh command is exe cuted The readings are sent to the computer and displayed when the unit is addressed to talk NOTE MEAS RES AC will turn the output OFF and leave it OFF Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 9 4 SCPI Signal Oriented Measurement Commands Models 2510 and 2510 AT User s Manual READ Description This command is used to trigger and acquire readings and is identical to MEASure When this command is sent the following commands exe cute in the order that they are presented INITiate e FETCh The INITiate command starts operation by taking the instrument out of idle After all control measure operations are completed th
226. resistance protection CONTROL ENABLE or DISABLE resistance protection LOLIM Program lower resistance limit 1Q to 200 100 RTD or thermistor 5Q to 2kQ IkO RTD or thermistor 50Q to 20kQ 10kQ thermistor 500Q to 200kQ 100kQ thermistor HILIM Program higher resistance limit SENSOR TYPE THERMISTOR RANGE I SRC SENSE MODE RTD I SRC RANGE SENSE MODE PID PROPORTIONAL INTEGRAL DERIVATIVE 50Q to 1kQ 100Q thermistor 500Q to 9 999kQ 1kQ thermistor 5kQ to 80kQ 10kQ thermistor 50kQ to 200kQ 100kQ thermistor 50Q to 250Q 100Q RTD 500Q to 3kQ 1kQ RTD Select sensor type and settings Program thermistor settings Set thermistor range 100Q 1kQ 10kQ 100kQ Set thermistor current AUTO 3 3nA 10uA 33 3nA 100pA 833 3pA 2 5mA Select 2 WIRE or 4 WIRE sense mode Program RTD settings Set RTD current AUTO 3 3nA 10pA 33 3pA 100pA 833 3pA 2 5mA Set RTD range 100Q or 10009 Select 2 WIRE or 4 WIRE sense mode Program PID loop constants for resistance Set proportional constant 0 to 100000 Set integral constant 0 to 100000 Set derivative constant 0 to 100000 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 3 8 Basic Operation Models 2510 and 2510 AT User s Manual Configuring output Using Table 3 5 as a guide configure the output as follows Press CONFIG then OUTPUT to enter the output configuration menu
227. ressed multiline command sequence C 12 Table C 4 Typical addressed common command sequence C 12 Table C 5 IEEE command groups eese nennen C 13 Table C 6 Model 2510 interface function codes C 14 D IEEE 488 and SCPI Conformance Information Table D 1 IEEE 488 documentation requirements D 3 Table D 2 Coupled commands eene D 4 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Getting Started General information Covers general information that includes warranty infor mation contact information safety symbols and terms inspection and available options and accessories Product overview Summarizes the features and basic operating characteristics of the Model 2510 Front and rear panel familiarization Summarizes the controls and connectors of the instrument Power up Covers line power connection line voltage settings fuse replace ment and the power up sequence Display Provides information about the Model 2510 display Default settings Covers factory default setups and saving and recalling user setups Menus Covers the main and configuration menus as well as rules to navigate menus Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 1 2 Getting Star
228. ressing the Model 2510 to talk a decimal number will be sent to the computer That is the number of mes sages in the Error Queue CODE NEXT SYSTem ERRor CODE NEXT Read oldest error code only Description This command is identical to the NEXT command except only the code is returned The message itself is not returned The error is cleared from the queue CODE ALL SYSTem ERRor CODE ALL Read all errors codes only Description This query command is identical to the SYSTem ERRor ALL com mand except only the codes are returned The actual messages are not returned All errors are cleared from the queue Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual SCPI Command Reference 10 51 CLEar SYSTem CLEar Clear Error Queue Description This action command is used to clear the Error Queue of messages Simulate key presses KEY lt NRf gt SYSTem KEY lt NRf gt Simulate key press Parameters lt NRf gt 4 Right arrow key 5 V 6 CONFIG 12 I 13 MENU 14 EXIT 16 TOGGLE 19 R 20 Up arrow key 21 ENTER 24 OUTPUT 27 Down arrow key 28 Left arrow key 29 T Query KEY Query last pressed key Description This command is used to simulate front panel key presses For example to select the MENU key you can send the following command to simu late pressing the menu key syst key 21 The parameter listin
229. revision level OPC operation complete Sets OPC bit OPC operation complete query Places a 1 in output queue When OPC is sent the OPC bit in the Standard Event Register will set after all pending command operations are complete When OPC is sent an ASCII 1 is placed in the Output Queue after all pending command operations are complete Typically either one of these commands is sent after the INITiate command The INITiate command is used to take the instrument out of idle in order to perform measurements While operating within the trigger model layers all sent commands except DCL SDC IFC SYSTem PRESet RST RCL TRG GET and ABORt will not execute After all programmed operations are completed the instrument returns to the idle state at which time all pending commands including OPC and or OPC are executed After the last pending command is executed the OPC bit and or an ASCII 1 is placed in the Output Queue When OPC is sent the OPC bit in the Standard Event Register will set after all pending command operations are complete When OPC is sent an ASCII 1 is placed in the Output Queue after all pending command operations are complete OPT option query Return list of installed options The OPT query returns a list of any installed options in ASCII format Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 8 4 Common Command
230. rivative and integral loop constants NOTE See Configuring functions page 3 3 and Rules to navigate menus page 1 21 for details on various menu selections and setting parameter values See PID Control Concepts and Sensor coefficients page 4 14 for details on programming the proportional integral and derivative constants and sensor parameters Step 3 Adjust setpoint Press one of the EDIT keys to enter the setpoint editing mode for the selected function Use the A and W keys to increment and decrement setpoint values use the left and right arrow keys to select the cursor position Step 4 Set current limit If required set the current limit as needed Press CONFIG then I then use the PROTECTION selection Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Basic Operation 3 11 Step 5 Turn output on Turn the output on by pressing the ON OFF OUTPUT key The OUTPUT indicator will turn on to indicate the output is on Step 6 Observe the display During operation you can observe the front panel display for operating and measured parameters For example for the temperature function the display will show the measured temperature and the temperature setpoint and you can use the DISPLAY TOGGLE key to cycle through the TEC voltage current power and resistance values as well as the sensor resistance Step 7 Turn output o
231. rmal and common mode voltages Use standard safety precautions to avoid personal contact with these voltages The WARNING heading in a manual explains dangers that might result in personal injury or death Always read the associated information very carefully before performing the indicated procedure The CAUTION heading in a manual explains hazards that could damage the instrument Such damage may invalidate the war ranty Instrumentation and accessories shall not be connected to humans Before performing any maintenance disconnect the line cord and all test cables To maintain protection from electric shock and fire replacement components in mains circuits including the power transformer test leads and input jacks must be purchased from Keithley Instruments Standard fuses with applicable national safety ap provals may be used if the rating and type are the same Other components that are not safety related may be purchased from other suppliers as long as they are equivalent to the original component Note that selected parts should be purchased only through Keithley Instruments to maintain accuracy and functionality of the product If you are unsure about the applicability of a replacement component call a Keithley Instruments office for information To clean an instrument use a damp cloth or mild water based cleaner Clean the exterior of the instrument only Do not apply cleaner directly to the instrument or allow liquids to enter o
232. rmistor 2e4Q 10kQ thermistor 2e5Q 100kQ thermistor 100Q RTD or thermistor 1kQ RTD or thermistor 10kQ thermistor 100kQ thermistor 1 100Q RTD or thermistor 5Q 1kQ RTD or thermistor 50Q 10kQ RTD or thermistor 500Q 100kQ thermistor 200Q 100Q or RTD thermistor 2 000e3Q 1kQ RTD or thermistor 2 000e4Q 10kQ thermistor 2 000e5Q 100kQ thermistor Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 38 SCPI Command Reference Models 2510 and 2510 AT User s Manual DEFault 50Q 100 RTD or thermistor 5e2Q 1kQ RTD or thermistor 5e3Q 10kQ thermistor 5e4Q 100kQ thermistor STATe lt b gt ON OFF Enable disable protection ON 1 Enable protection OFF 0 Disable protection Query HIGH LEVel Query high limit HIGH TRIPped Query if high limit exceeded 1 exceeded LOW LEVel Query low limit LOW TRIPped Query if low limit exceeded 1 exceeded STATe Query if protection is enabled Description The HIGH and LOW commands program the high and low limits respectively for the resistance function while the STATe command enables and disables resistance function limits The two TRIPPed que ries return a value of 1 if the corresponding limit is exceeded or a value of 0 if it is not exceeded STATe returns a value of 1 if protection is enabled Note that the high limit cannot be lower than the low limit and the low limit cannot be higher tha
233. ry Selects output response format of Digital I O settings SOURce2 Query Digital I O output response format Note RST default NORMal SYSTem PRESet default SWAPped Table 10 3 OUTPut subsystem commands Default Command Description parameter SCPI OUTPut 1 V ENABIe Path to control Digital I O output enable line STATe lt b gt Activate ON 1 or inactivate OFF 0 enable line OFF STATe Query state of output enable line TRIPped Output enable line tripped 1 no 0 yes STATe Enable ON 1 or disable OFF 0 output OFF 4 STATe Query output state V Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual SCPI Command Reference 10 5 Table 10 4 SENSe 1 subsystem commands Command Description Default parameter SCPI SENSe 1 V CURRent DC Path to configure DC current 4 PROTection Set current protection 4 LEVel n Set protection current level 2 0 V n 1 0 to 5 25 A MINI MAX DEF LEVel Query protection current level V TRIPped Query if protection level exceeded V 1 tripped RESistance Path to configure resistance V CURRent n Set RTD or thermistor sensor current 2 5e 3 100Q range n 3e 6 to 1e 3 3 3e 6 1e 5 3 33e 5 8 333e 4 1kQ range le 4 8 333e 4 2 5e 3 MIN MAX DEF le 4 10kQ range 3 33e 5 100kQ range AUTO b Enable disable default senso
234. ry command to perform a checksum test on ROM The command places the coded result 0 or 1 in the Output Queue When the Model 2510 is addressed to talk the coded result is sent from the Output Queue to the computer A returned value of zero 0 indicates that the test passed and a value of one 1 indicates that the test failed Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Common Commands 8 5 WAI wait to continue Wait until previous commands are completed Effectively the WAI command is a No Op no operation for the Model 2510 and thus does not need to be used Two types of device commands exist Sequential commands A command whose operations are allowed to finish before the next command is executed Overlapped commands A command that allows the execution of subsequent commands while device operations of the Overlapped command are still in progress The WAI command is used to suspend the execution of subsequent commands until the device operations of all previous Overlapped commands are finished The WAI command is not needed for Sequential commands Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com SCPI Signal Oriented Measurement Commands Command summary Summarizes those commands used to configure and acquire readings Acquiring readings Des
235. s Register Output Queue Standard Event Status Enable Register Operation Complete Query Error Device Specific Error Execution Error Command Error User Request Power On Always Zero Measurement Measurement Measurement Event Condition Event Enable Register Register Register Over Temperature OT OT Under Temperature Over Voltage Current Overload Over Resistance Under Resistance Reading Available Reading Overflow Output Enable Setpoint Tolerance Open Lead Shorted Lead Always Zero Status Structure 5 Logical OR Logical OR Operation Operation Operation Event Condition Event Enable Register Register Register Calibrating Cal Cal Cal Error Queue Service Status Request Byte Enable Register Register Logical OR STB Master Summary Status MSS MSB Measurement Summary Bit EAV Error Available QSB Questionable Summary Bit MAV Message Available ESB Event Summary Bit RQS MSS Request for Service Master Summary Staus OSB Operation Summary Bit Note RQS bit is in serial poll byte MSS bit is in STB response Logical OR 000000000000 0000 Model 2510 AT only Test Equipment D
236. s 2510 and 2510 AT User s Manual SCPI Command Reference 10 29 AUTO b SENSe 1 TEMPerature CURRent AUTO lt b gt Enable disable auto sensor current Parameters lt b gt 1 or ON Enable auto sensor current 0 or OFF Disable auto sensor current Query AUTO Query auto sensor current state Description This command enables or disables the auto sensor current mode When the auto current mode is enabled the sensor current is set as follows Range Current 1006 RTD or thermistor 2 5mA 1kQ RTD or thermistor 833 31A 10kQ thermistor 100pA 100kQ thermistor 33 3nA TRANsducer lt name gt SENSe 1 TEMPerature TRANsducer lt name gt Select temperature function sensor Parameters lt name gt THERmistor Select thermistor sensor RTD Select RTD sensor VSS Voltage type solid state sensor ISS Current type solid state sensor Query TRANsducer Query sensor type Description This command select the temperature sensor for the temperature func tion All four sensor types are available for use with the temperature function RTD sensor parameters TYPE lt name gt SENSe 1 TEMPerature RTD TYPE lt name gt Select RTD sensor type Parameters lt name gt PT385 Select PT385 RTD sensor PT3916 Select PT3916 RTD sensor PT100 Select PT100 RTD sensor D100 Select D100 RTD sensor F100 Select F100 RTD sensor USER Select USER sensor Query TYPE Query RTD sensor type Description This command selects the RTD temperature sensor type for the t
237. s Models 2510 and 2510 AT User s Manual SAV lt NRf gt save Save present setup in memory RCL lt NRf gt recall Return to setup stored in memory Parameters 0 Memory location 0 1 Memory location 1 2 Memory location 2 3 Memory location 3 4 Memory location 4 Use the SAV command to save the present instrument setup configuration in non volatile memory for later recall Any control affected by RST can be saved by the SAV com mand The RCL command is used to restore the instrument to the saved setup configura tion Five setup configurations can be saved and recalled The Model 2510 ships from the factory with SYSTem PRESet defaults loaded into the available setup memory If a recall error occurs the setup memory defaults to the SYSTem PRESet values See Table 10 1 through Table 10 10 in Section 10 for SYSTem PRESet and RST default conditions RST reset Return Model 2510 to GPIB defaults When the RST command is sent the Model 2510 performs the following operations Returns the Model 2510 to the GPIB default conditions see Section 10 SCPI Command Reference e Cancels all pending commands e Cancels response to any previously received OPC and OPC commands TRG trigger Send bus trigger to Model 2510 Use the TRG command to issue a GPIB trigger to the Model 2510 It has the same effect as a group execute trigger GET TST sel test query Run self test and read result Use this que
238. s and Error Messages B 9 Incorrectly configured IEEE 488 driver The driver must be configured so that when talking on the bus it sends line feed with EOI as the terminator and when lis tening on the bus it expects line feed with EOI as the terminator See the reference manual for your particular IEEE 488 interface Errors when transferring binary data Many programs such as Test Point Lab View or Visual Basic default to terminating communications with a carriage return CR and or line feed LF When transmitting binary data a random bit pattern could be misinterpreted as a CR or LF and terminate communication before all bytes are transmitted resulting in this error To avoid this problem with binary transfers change the default terminator to none to avoid problems and terminate on EOI only See the FORM DATA command in FORMat subsystem page 10 19 for information on selecting the binary transfer data format 420 Query UNTERMINATED This error occurs when you address the instrument to talk and there is no response mes sage to send The most likely causes are Not sending a query You must send a valid query to the instrument before address ing it to talk Sending an invalid query If you have sent a query and still get this error make sure that the instrument is processing the query without error For example sending an ill formed query that generates an error 113 Undefined header and then addressing the instrume
239. s command is used to initiate control measure operation by taking the Model 2510 out of idle The READ and MEASure commands also perform an initiation Abort source measure cycle ABORt Abort operation Description When this action command is sent the Model 2510 aborts operation returns to the idle state and turns the output off UNIT subsystem The UNIT subsystem controls units used for the temperature function These commands are summarized in Table 10 10 TEMPerature lt name gt UNIT TEMPerature lt name gt Set temperature units Parameters lt name gt CICEL Celsius units F FAR Fahrenheit units K Kelvin units Query TEMPerature Query temperature units Description This command sets the units for the temperature function Temperature units include C F and K Note that both temperature command parameter units and reading temperature units are affected by this command Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Specifications Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 2510 TEC SourceMeter The Model 2510 Thermoelectric Cooler Controller is designed to control the power to the TEC to maintain a constant temperature current voltage or thermistor resistance measure the resistance of the TEC software PID loop CONTROL SYSTEM SPECIFICATIONS SET Constant Peltier Temperatur
240. s that are particular to each device on the bus sent with ATN false These bus commands and their general purpose are summarized in Table C 1 Table C 1 IEEE 488 bus command summary State of Command type Command ATN line Comments Uniline REN Remote Enable X Set up devices for remote operation EOI End Or Identify X Marks end of transmission IFC Interface Clear X Clears interface ATN Attention Low Defines data bus contents SRQ Service Request X Controlled by external device Multiline LLO Local Lockout Low Locks out local operation Universal DCL Device Clear Low Returns device to default conditions SPE Serial Poll Enable Low Enables serial polling SPD Serial Poll Disable Low Disables serial polling Addressed SDC Selective Device Clear Low Returns unit to default conditions GTL Go To Local Low Returns device to local Unaddressed UNL Unlisten Low Removes all listeners from the bus UNT Untalk Low Removes any talkers from the bus Common High Programs IEEE 488 2 compatible instruments for common operations SCPI High Programs SCPI compatible instruments for particular operations Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com C 8 IEEE 488 Bus Overview Models 2510 and 2510 AT User s Manual Uniline commands ATN IFC and REN are asserted only by the controller SRQ is asserted by an external device EOI may be asserted eith
241. sabled and the 488 1 protocol is enabled To summarize 1 SCPI protocol 0 488 1 protocol Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual GPIB 488 1 Protocol F 3 Protocol differences The following information covers the differences between the 488 1 protocol and the SCPI protocol Message exchange protocol MEP When the 488 1 protocol is selected the MEP is disabled to speed up GPIB operation The following guidelines limitations must be followed when using the 488 1 protocol If a query is sent it must be the only command on the line this limitation also means no multiple queries can be sent Otherwise full SCPI command syntax is still supported including long form and short form commands multiple com mands and MIN MAX DEF parameter definitions For example the following command strings are invalid SOUR VOLT 10 OPC SOUR RES READ READ READ The following command strings are valid SOURce1 TEMPerature 25 sour temp prot 50 sens curr prot 2 sour volt 5 SENS TEMP CURR MAX READ When a query is sent either the data must be read back or a Device Clear DCL or Interface Clear IFC must be performed to reset the query When sending a command or query do not attempt to read data from the Source Meter until the terminator has been sent usually Line Feed with EOI Otherwise a DCL or IFC must be sent to
242. shown in Figure 3 1 In this example the voltage limit is set to 5V while the current limit is 2A The shaded areas of the graph show output currents or voltages that are restricted by the respective limits Figure 3 1 Voltage and current limit operating boundaries No Operation No Operation Setpoint tolerance SOD ONUS XD SS SxS SSRRK K NE SRR RKO SOK KKK KO SSS SRS SOSS SOOO KL XXX SS RRR OX XS XO lt gt SSO KOSS LOSSES OSORNO RRS zgana 0905 SS 0505060905 PORK KOK oS KR RXR K No Operation Qe o NE Nee bo pos V pe No PERK KXO e eed 02S eo SQ LX SN CX Lo Itage and Current Limit 2 EXXKKRRWVWVWKO QOO QAO E e SOO KIO os SRR S e lt gt Z QO RRRS RRR Q Mt RSS XS The setpoint tolerance feature allows you to program the Model 2510 to indicate when the setpoint is within the desired range or window for a certain number of readings For example with a tolerance of 1 the setpoint will be within tolerance when the tempera ture is within 2 75 C of the setpoint for the programmed number of readings Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 3 16 Basic Operation Ranges Ranges by function are shown in Table 3 9 Table 3 9 Setpoint tolerance ranges Models 2510 and 2510 AT User s Manual Function Temperature Voltage Current
243. sing the transmission and parser times for the command Remember that the out put must be on OUTput STATe ON before you can take readings Message available The MAV message available bit in the Serial Poll byte will be set when the query is fin ished being processed not when there is data available in the output buffer as with the SCPI protocol For the 488 1 protocol output data will not be formatted until the first request for data is received This delay may cause unexpected time outs when using SRQ on MAV for queries that take a long time to execute General operation notes The TALK LSTN and SRQ annunciators are not functional in the 488 1 protocol This speeds up data throughput greatly The REM annunciator still operates since it is critical to fundamental GPIB operation If the unit is in REMote the GTL command may not put the SourceMeter into the local mode Only the front panel LOCAL key is guaranteed to operate if not in local lockout LLO GTL will still disable LLO e EEE 488 bus commands and features GET IFC SDC DCL LLO SPE SPD Serial Poll and SRQ are still fully supported Multiple TALKs on the same query are supported as in the SCPI protocol This fea ture is useful when reading back long ASCII strings Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Index Symbols DISPlay subsystem commands 10 3 FORMat subsystem commands 10 4 DN
244. sistance 5Q to 9 999kQ 1kQ thermistor 50Q to 80kQ 10kQ thermistor 500Q to 200kQ 100kQ thermistor 1Q to 250Q 100Q RTD 5Q to 3kQ 1kQ RTD Setpoint cannot be set above or below protection limits Setpoint cannot be set above protection limit Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 3 10 Basic Operation Models 2510 and 2510 AT User s Manual Basic front panel control measure procedure Use the following procedure to perform the basic control measure operations NOTE The following procedure assumes that the Model 2510 is already connected to the thermoelectric cooler and temperature sensor as explained in Inputloutput connections page 2 2 Step 1 Select function Press the T V I or R key to select the desired control function T Temperature function e V Voltage function I Current function R Resistance function Step 2 Configure function Press CONFIG then the function key to configure the various operating parameter for the function to be used For example to configure the temperature function press CONFIG then T and then set the following operating parameters PROTECTION Enable protection and program the high and low temperature limits e SENSOR TYPE Select the type of sensor being used then set the associated sen sor parameters UNITS Select the desired temperature units PID Program the proportional de
245. ss 5 5 o eate eue eie eet eben 6 6 RS 232 interface operation eese 6 6 Sending and receiving data sese 6 6 hrunpcg e decison 6 6 Data bits and parity seen 6 7 fios 6 7 Flow control signal handshaking 6 7 RS 232 connections e esercito ennt ttn tnn tano 6 8 Front panel GPIB operation eee 6 9 Error and status messages esee 6 9 GPIB status indicators 0 eee eseeeeeseeeseeseeeseeeeeeseeseeeaes 6 9 RENS iion nU RR S 6 9 TALK eee e eaaa utet ette pes 6 10 DES TN E A E E teres teen itis 6 10 Nope 6 10 DISPLAY TOGGLE LOCAL key n 6 10 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com General bus commands sees eene 6 11 REN remote enable ccsceccsssecesseeesseeeesseeessneeeesneees 6 11 IFC Gnterface clear 5 eer eres erotuet 6 11 LEO local locko t tet eter ca 6 11 GTE amp 0 to local 4 2 eerte ret ren ee en ou es 6 12 DCL device cleat oe eene 6 12 SDC selective device clear ccsscccssseceesseeesseeeesseeeees 6 12 GET group execute trigger esee 6 12 SPE SPD serial polling eee 6 12 Programming syntax esee nennen emen 6 12 Command by M M 6 12 Commands and command
246. subsystem page 10 45 for details Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual SCPI Command Reference 10 23 Byte order BORDer name FORMat BORDer lt name gt Specify binary byte order Parameters lt name gt NORMal Normal byte order for binary formats SWAPped Reverse byte order for binary formats Query BORDer Query byte order Description This command is used to control the byte order for the IEEE 754 binary formats For normal byte order the data format for each element is sent as follows Byte 1 Byte2 Byte3 Byte4 Single precision For reverse byte order the data format for each element is sent as follows Byte4 Byte3 Byte2 Byte1 Single precision The 0 Header is not affected by this command The Header is always sent at the beginning of the data string for each measurement conversion The ASCII data format can only be sent in the normal byte order The SWAPped selection is simply ignored when the ASCII format is selected NOTE The SWAPped byte order must be used when transmitting binary data to any IBM PC compatible computer Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 24 SCPI Command Reference Models 2510 and 2510 AT User s Manual Status register format SREGister name FORMat SREGister lt name gt Set data format for reading status
247. t LOLIM then press ENTER Set the low temperature limit using the EDIT keys then press ENTER again Choose HILIM then press ENTER set the high temperature limit using the EDIT keys then again press ENTER Press EXIT choose SENSOR TYPE then press ENTER Choose the desired temperature sensor THERMISTOR RTD I SS or V SS then press ENTER Program the settings for the selected temperature sensor For example for an RTD sensor choose the following TYPE Select PT385 PT3916 PT100 D100 F100 or USER type For USER type set ot D and 6 RANGE Select 100 or 1000 SRC Set RTD current AUTO 3 3pA 10pA 33 3pA 100pA 833 3pA or 2 5mA e SENSE MODE Choose 2 WIRE or 4 WIRE sensing Use 4 wire for sensors lt 1kQ Press EXIT as needed to return to the CONFIG TEMPERATURE menu Select UNITS press ENTER then select the desired units C F or Kelvin Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 3 4 Basic Operation Models 2510 and 2510 AT User s Manual 12 Choose PID then press ENTER 13 Program your PROPORTIONAL INTEGRAL and DERIVATIVE constants as required 14 After programming press EXIT as necessary to return to normal display Table 3 1 Temperature configuration menu Configuration menu item Description PROTECTION Configure temperature protection CONTROL ENABLE or DISABLE temperature protection LOLIM Program lower limit 50 to 250 C 223
248. t amplitude Description This command programs the current amplitude setpoint for the current source function The current amplitude can be set over a range of 5A but cannot exceed the current protection limit LCONstants SOURCcel 1 CURRent LCONstants GAIN n Program proportional constant SOURce 1 CURRent LCONstants DERvative n Program derivative constant SOURce 1 CURRent LCONstants INTegral n Program integral constant Parameters GAIN lt n gt 0 to 1e5 Set proportional constant value MINimum 0 MAXIMUM le5 DEFault 10 0 DERivative lt n gt 0 to le5 Set derivative constant value MINimum 0 MAXimum le5 DEFault 0 0 INTegral n Oto 1e5 Set integral constant value MINimum 0 MAXimum le5 DEFault 20 0 Query GAIN Query proportional constant DERivative Query derivative constant INTegral Query integral constant Description These commands program the current function PID loop constants which must be set to appropriate values for suitable control characteris tics See Section 4 PID Control Concepts for information on choosing appropriate values Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 36 SCPI Command Reference Models 2510 and 2510 AT User s Manual Resistance function AMPLitude n SOURce 1 RESistance LEVel 1MMediate AMPLitude n Program resistance value Parameters n 1 to 1 000e3Q 100Q thermistor 5 to 9 999e3Q 1k
249. tal format x 0 to 177777 lt NRf gt 0t065535 Decimal format Note Power up and STATus PRESet reset all bits of all enable registers to 0 CLS has no effect Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Status Structure 7 19 Programming example program and read register set The command sequence in Table 7 8 programs and reads the measurement register set Registers are read using the binary format which directly indicates which bits are set The command to select format FORMat SREGister is documented in Table 7 2 Table 7 8 Program and read register programming example Command Description FORM SREG BIN Select binary format to read registers STAT MEAS ENAB 512 Enable BFL buffer full STAT MEAS COND Read Measurement Condition Register STAT MEAS Read Measurement Event Register Queues The Model 2510 uses two queues which are first in first out FIFO registers Output Queue Used to hold reading and response messages Error Queue Used to hold error and status messages See Appendix B The Model 2510 status model Figure 7 1 shows how the two queues are structured with the other registers Output queue The output queue holds data that pertains to the normal operation of the instrument For example when a query command is sent the response message is placed in the Output Q
250. tatus Turns main unit power on or off Pull out and rotate to desired position Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Getting Started 1 7 Rear panel summary The rear panel of the Model 2510 is shown in Figure 1 2 The following abbreviated infor mation should be reviewed before operating the instrument Figure 1 2 Model 2510 rear panel WAFUJING uo INTEFNAL OPERATOR SERVICABLE P am cart A pe OUTPUT INPUT a WERE HS rs S S F IF F S S OLAN FROM BARTHE GU Wi ENABLE DIG VO g owe TRIGGER RS 232 LINK LINE FUSE SLOWBLOW 2 5A 250V LINE RATING 100 240VAC 50 60 HZ 90VA MAX CAUTION ron CONTINUED PROTECTION AGAINST FIRE HAZARDREPLACE FUSE WITH SAME TYPE AND RATING Input output connector N KF OUTPUT terminals Source output connections to thermoelectric cooler INPUT terminals Temperature sensor input connections Digital 1 O port ENABLE DIG I O Male DB 9 connector for digital output lines and output enable Power module Contains the AC line receptacle and the power line fuse Trigger link connector TRIGGER LINK 8 pin micro DIN connector for sending and receiving trigger pulses Not currently implemented RS 232 connector RS 232 Connector for RS 232 remote operation Use a straight through not null modem DB 9 cable such as a Keithley Model 7009 5 GPIB connecto
251. ted Models 2510 and 2510 AT User s Manual General information Warranty information Warranty information is located at the front of this manual Should your Model 2510 require warranty service contact the Keithley representative or authorized repair facility in your area for further information When returning the instrument for repair be sure to fill out and include the service form at the back of this manual to provide the repair facility with the necessary information Contact information Worldwide phone numbers are listed at the front of this manual If you have any questions please contact your local Keithley representative or call one of our Application Engineers at 1 800 348 3735 U S and Canada only Manual addenda Any improvements or changes concerning the instrument or manual will be explained in an addendum included with the manual Be sure to note these changes and incorporate them into the manual Safety symbols and terms The following symbols and terms may be found on the instrument or used in this manual The AN symbol on an instrument indicates that the user should refer to the operating instructions located in the manual The A symbol on the instrument shows that high voltage may be present on the termi nal s Use standard safety precautions to avoid personal contact with these voltages The WARNING heading used in this manual explains dangers that might result in per sonal injury or death Always read the
252. that the byte on the data lines is now valid NRFD will then go low and NDAC will go high once all devices have accepted the data Each device will release NDAC at its own rate but NDAC will not be released to go high until all devices have accepted the data byte The sequence just described is used to transfer both data talk and listen addresses as well as multiline commands The state of the ATN line determines whether the data bus con tains data addresses or commands as described in the following paragraph Figure C 2 IEEE 488 handshake sequence DATA SOURCE DAV SOURCE VALID a ALL READY ACCEPTOR NRFD ALL ACCEPTED NDAC ACCEPTOR Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual IEEE 488 Bus Overview C 7 Bus commands The instrument may be given a number of special bus commands through the IEEE 488 interface This section briefly describes the purpose of the bus commands which are grouped into the following four categories 1 Uniline commands Sent by setting the associated bus lines true For example to assert REN Remote Enable the REN line would be set low true 2 Multiline commands General bus commands which are sent over the data lines with the ATN line true low 3 Common commands Commands that are common to all devices on the bus sent with ATN high false 4 SCPIcommands Command
253. the computer and the Model 2510 3 Make sure the Model 2510 is set for a primary address of 15 Use the front panel MENU COMMUNICATIONS GPIB selection to check or change the address 4 Make sure that the computer bus driver software CECHP EXE is properly initial ized 5 Enter the QBasic editor and type in the example program from the listing later in this Appendix 6 Check thoroughly for errors then save it using a convenient filename 7 Run the program and note any display messages on the computer screen Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Example Programs E 3 Basic temperature control program Program 1 is a complete program listing for the basic remote control measure sequence outlined in Section 3 Instrument setup Briefly Program 1 sets up the Model 2510 as follows Temperature function setpoint 50 C Lower and upper limits 10 C and 100 C PT100 100Q RTD sensor with 4 wire sensing PID loop constants 10 0 5 and 0 Current limit 5 25A Requested readings The program requests the following readings from the unit TEC power TEC current Temperature TEC DC resistance TEC voltage Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com E 4 Example Programs Models 2510 and 2510 AT User s Manual Setpoint tolerance temperature sweep Over
254. the operation of front panel keys Its operation is similar to the IEEE 488 GTL command Section 6 REMote SYSTem REMote Place the Model 2510 in remote Description This command is used to place the Model 2510 in the remote state In remote the front panel keys will be locked out if local lockout is asserted See RWLock REMote performs the same function as the IEEE 488 REN command Section 6 RWLock SYSTem RWLock Disable front panel keys Description This command is used to enable or disable local lockout When enabled the front panel keys are locked out not operational when the instru ment is in remote See REMote page 10 53 When disabled the front panel keys are operational in remote RWLock performs the same function as the IEEE 488 LLO command Section 6 NOTE OUTPUT OFF is still operational in local lockout Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 54 SCPI Command Reference Models 2510 and 2510 AT User s Manual Trigger subsystem The Trigger subsystem is made up of commands to configure triggering These commands are summarized in Table 10 9 NOTE The trigger commands function only in the calibration mode and they are ignored during normal operation See the Model 2510 Service Manual for details on calibrating the unit Initiate control measure cycle INITiate INITiate IMMediate Take Model 2510 out of idle state Description Thi
255. tion 7 for status register and SRQ details Temperature sweep program summary Program 2 demonstrates the basic programming steps for generating a temperature sweep using setpoint tolerance For the most part the instrument is operated using default condi tions by sending a RST command at the beginning of the program See Section 1 Table 1 3 Other key programming modes include e SRQon setpoint tolerance enabled e Setpoint tolerance percent window 1 10 reading count Upper temperature limit 90 C Temperature setpoint sweep under program control 40 C to 80 C in 10 C steps When the program is run it cycles through the temperature setpoints stopping to wait for the Model 2510 to an SRQ when each setpoint is within tolerance The TEC power at each setpoint is also requested and displayed Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com E 6 Example Programs Models 2510 and 2510 AT User s Manual Program 1 Basic temperature control The program performs basic temperature control measure OPEN OPEN P P P U Uu tu Uu U U u c v 2510 primary address 15 RINT RINT RINT Step RINT Step RINT Step RINT RINT RINT RINT RINT RINT RINT RINT RINT RINT dE db db db db db db db db od Step RINT Step RINT Step RINT 1 e N PRPRPPPPRPRPRP Bw e IEEE FOR OUTPUT AS 1 IEE
256. tion menu item Description GND CONNECT Select input output analog common ground connection DISABLE Disable ground connection ENABLE Enable ground connection ENABLE Enable disable Digital I O port output enable line DISABLE Inactivate output enable line ENABLE Activate output enable line Table 1 10 Setpoint tolerance configuration menu Configuration menu item Description SETPOINT TOLERANCE PERCENTAGE Percent of range for setpoint tolerance WINDOW SIZE Number readings to be within tolerance Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Connections Input output connections Discusses connections for the thermoelectric cooler and temperature sensor Sense selection Summarizes 2 wire and 4 wire sensing selection for both INPUT and OUTPUT terminals Ground connect mode Describes using the ground connect mode Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 2 2 Connections Models 2510 and 2510 AT User s Manual Input output connections Input output connector The input output connector is located on the rear panel see Figure 2 1 and Figure 2 2 Terminals include e OUTPUT terminals F F force S and S sense connections to thermoelec tric cooler INPUT terminals F F force S and S Kelvin sense connections to temper ature sensor Use the supplied mating con
257. tion point In some cases connections must be exposed to potential human contact Product operators in these circumstances must be trained to protect themselves from the risk of electric shock If the circuit is capable of operating at or above 1000 volts no conductive part of the circuit may be exposed Do not connect switching cards directly to unlimited power circuits They are intended to be used with impedance limited sourc es NEVER connect switching cards directly to AC mains When connecting sources to switching cards install protective de vices to limit fault current and voltage to the card Before operating an instrument make sure the line cord is connected to a properly grounded power receptacle Inspect the con necting cables test leads and jumpers for possible wear cracks or breaks before each use When installing equipment where access to the main power cord is restricted such as rack mounting a separate main input pow er disconnect device must be provided in close proximity to the equipment and within easy reach of the operator For maximum safety do not touch the product test cables or any other instruments while power is applied to the circuit under test ALWAYS remove power from the entire test system and discharge any capacitors before connecting or disconnecting ca 2 02 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com bles or jumpers installing or removing
258. to configure and control the measurement functions of the Model 2510 Measurement functions include current temperature and resistance The commands for this subsystem are summarized in Table 10 4 Current function PROTection LEVel n SENSe 1 CURRent DC PROTection LEVel n Program current protection limit Parameters n 1 0 to 5 25A Set current protection limit MINimum 1 0 MAXimum 5 25 DEFault 2 0 Query PROTection LEVel Query current protection limit Description This command programs the current protection limit You can determine whether or not the limit has been exceeded by using the TRIPped query below TRIPped lt n gt SENSe 1 CURRent DC PROTection TRIPped Query if current limit exceeded Description This command queries whether or not the current protection limit has been exceeded A returned value of 1 current limit exceeded 0 cur rent limit not exceeded NOTE The SOURcel subsystem commands determine which function is controlled by the PID loop All SENSel parameters are monitored continuously Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual SCPI Command Reference 10 27 Resistance function CURRent n SENSe 1 RESistance CURRent n Set RTD or thermistor sensor current Parameters n 3e 6 to 2 5e 3 Set sensor current 3 3e 6 1e 5 3 33e 5 le 4 8 333e 4 2 5e 3 MIN
259. to step function eseseeeere 4 9 5 Digital I O Port and Output Enable Figure 5 1 Digital T O pott 1i rre itr RR eara repens 5 2 Figure 5 2 Sink operation eiecit rione cea these Aerea podia 5 3 Figure 5 3 SOULCE Operation Mee 5 4 Figure 5 4 Using output enable oo eee eeeeeceseeseeeseseeeeaeeeeeeaeseeetseeeaes 5 7 6 Remote Operations Figure 6 1 IEEBE 488 conn ctot ocn Hr mei ete tees 6 4 Figure 6 2 IEEE 488 connections eene 6 4 Figure 6 3 IEEE 488 and RS 232 connector locations 6 5 Figure 6 4 RS 232 interface connector 6 8 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 7 Status Structure Figure 7 1 Model 2510 status register structure eee 7 3 Figure 7 2 16 bit status register iecit tree ette tne 7 5 Figure 7 3 Status byte and service request SRQ sssse 7 7 Figure 7 4 Standard event status sse 7 12 Figure 7 5 Operation event status nennen 7 13 Figure 7 6 Measurement event status sese 7 15 Figure 7 7 Questionable event status sesseseeeeeeeeeeene 7 16 10 SCPI Command Reference Figure 10 1 ASCH data format ssr nettement 10 19 Figure 10 2 IEEE 754 single precision data format 32 data bits 10 20 C IEEE 488 Bus Overview Figure C 1 IEEE 488 bus configuration eee C 3 Figure C 2 IEEE 488 handshake s
260. tpoint to be considered to be within tolerance POINts SOURce 1 STOLerance POINts Query number of readings within window Description This command queries the number of readings that have currently been within the programmed tolerance window PID autotune Model 2510 AT only Select minimum settling time criteria MSETtle SOURce 1 TEMPerature ATUNe LCONstants MSETtle GAIN2 Query gain constant SOURce 1 TEMPerature ATUNe LCONstants MSETtle DERivative Query derivative constant SOURce 1 TEMPerature ATUNe LCONStants MSETtle INTegral Query integral constant SOURce 1 TEMPerature ATUNe LCONstants MSETtle TRANsfer Set constants as defaults Description These commands are used to control PID autotuning for minimum set tling time criteria See Section 4 The GAIN DER and INT queries request the autotune loop constant values while the TRAN command transfers constants as default values Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 10 44 SCPI Command Reference Models 2510 and 2510 AT User s Manual Select minimum overshoot criteria MOVershoot SOURce 1 TEMPerature ATUNe LCONstants MOVershoot GAIN Query gain constant SOURce 1 TEMPerature ATUNe LCONstants MOVershoot DERivative Query derivative constant SOURce 1 TEMPerature ATUNe LCONstants MOVershoot INTegral Query integral constant SOURce 1 TEMPerature ATUNe LCONstants MOVershoot TRANsfer Set constants as de
261. ucture which are discussed in Section 7 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 8 2 Common Commands Command summary Models 2510 and 2510 AT User s Manual Common commands summarized in Table 8 1 are device commands that are common to all devices on the bus These commands are designated and defined by the IEEE 488 2 standard Most of these commands are described in detail in this section NOTE The following common commands associated with the status structure are cov ered in Status Structure Section 7 CLS ESE ESE ESR SRE SRE and STB Table 8 1 IEEE 488 2 common commands and queries Mnemonic Name Description CLS Clear status Clears all event registers and Error Queue ESE NRf Event enable command Program the Standard Event Enable Register ESE Event enable query Read the Standard Event Enable Register ESR Event status register query Read and clear the Standard Event Enable Register DN Identification query Returns the manufacturer model number serial number and firmware revision levels of the unit OPC Operation complete command Set the Operation Complete bit in the Standard Event Register after all pending commands have been executed OPC Operation complete query Places an ASCII 1 into the Output Queue when all pending selected device operations have been completed OPT Option query Retur
262. ueue When data is placed in the Output Queue the Message Available MAV bit in the Status Byte Register sets A data message is cleared from the Output Queue when it is read The Output Queue is considered cleared when it is empty An empty Output Queue clears the MAV bit in the Status Byte Register A message is read from the Output Queue by addressing the Model 2510 to talk after the appropriate query is sent Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 7 20 Status Structure Models 2510 and 2510 AT User s Manual Error queue The Error Queue holds error and status messages When an error or status event occurs a message that defines the error status is placed in the Error Queue When a message is placed in the Error Queue the Error Available EAV bit in the Status Byte Register is set An error status message is cleared from the Error Queue when it is read The Error Queue is considered cleared when it is empty An empty Error Queue clears the EAV bit in the Status Byte Register The Error Queue holds up to 10 error status messages The commands to read the Error Queue are listed in Table 7 9 When you read a single message in the Error Queue the oldest message is read and then removed from the queue If the queue becomes full the message 350 Queue Overflow will occupy the last memory location On power up the Error Queue is empty When empty the message 0
263. ugh a second set of wires S terminals OUTPUT sensing Sensing though the OUTPUT terminals is automatic with no user programming required To use sensing with OUTPUT connections simply make 4 wire connections to the ther moelectric cooler as shown in Figure 2 2 Note that it is recommended that you use 4 wire OUTPUT connections whenever the thermoelectric cooler voltage or resistance must be accurately known INPUT sensing 4 wire sensing may be used for both RTD and thermistor sensors but sense selection is not automatic The sense mode must be manually set when choosing a sensor type with the CONFIG T or CONFIG R menus See Configuring functions page 3 3 for details NOTE 4 wire connections and 4 wire sensing should be used with RTD and thermistor sensors with resistances IkQ to avoid errors caused by lead resistance Sensing considerations Figure 2 4 shows a comparison of 2 and 4 wire sensing methods In these examples the INPUT terminals are connected to a thermistor type temperature sensor but the consider ations for RTD sensors and OUTPUT connections to the TEC are similar 2 wire sensing The 2 wire connecting method is shown in Figure 2 4A To determine the sensor resis tance the test current I is forced through the F and F test leads and the resistance of the thermistor being measured Ry The Model 2510 then measures the voltage across the thermistor through the same F and F connecting wires and computes th
264. uipmentDepot com Remote commands and command parameters 6 13 Remote setpoint program 3 12 SCPI commands 9 4 Single command message 6 16 Status byte programming 7 10 Factory defaults 1 16 FETCh 9 2 Flow control 6 7 FORMat subsystem 10 19 Byte order 10 23 Data elements 10 21 Data format 10 19 Status register format 10 24 Front panel 1 5 Front panel summary 1 5 Front panel tests 1 15 Fuse replacement 1 10 General bus commands 6 11 General information 1 2 GET group execute trigger 6 12 GPIB 6 3 Front panel operation 6 9 Primary address 6 6 Standards 6 3 Status indicators 6 9 GPIB 488 1 protocol F 1 Ground connect mode 2 7 Ground screw 1 7 GTL go to local 6 12 Handshaking 6 7 IEEE 488 and SCPI conformance information D 1 IEEE 488 bus overview C 1 IFC interface clear 6 11 Indicator ON OFF 1 15 Within setpoint tolerance 3 16 INITiate 9 4 INPUT sensing 2 5 Inspection 1 3 Keys EDIT 1 5 1 15 Function 1 5 Operation 1 5 Line frequency 1 9 Line frequency setting 1 9 Line power connection 1 8 LLO local lockout 6 11 MEASure 9 3 Measurement AC ohms 2 7 Ground connect mode 2 7 Measurement configuration AC resistance 3 6 Current 3 5 DC resistance 3 6 Temperature 3 3 Voltage 3 5 Menu Main 1 19 Menus 1 19 Configuration 1 21 Current 1 24 Main 1 19 Main menu tree 1 22 Navigating 1 21 Output 1 26 Resistance 1 25 Setpoint tolerance 1 26 Temperature 1 23 Voltage 1 24 Message exchange prot
265. uration menu eene 3 9 Table 3 8 Protection limit characteristics seeeeeene 3 13 Table 3 9 Setpoint tolerance ranges eese 3 16 Table 3 10 Sensor open lead and shorted lead ranges 3 18 4 PID Control Concepts Table 4 1 Response time comparison example 1 laser diode Lag Time 0 77sec Tau Time 7 70sec 4 6 Table 4 2 Response time comparison example 2 Lag Time 11 0sec Tau Time 107 0sec 4 8 Table 4 3 Autotune commands esee nene 4 11 5 Digital I O Port and Output Enable Table 5 1 Digital output line settings eee 5 5 6 Remote Operations Table 6 1 RS 232 connector pinout esee 6 8 Table 6 2 PC serial port pinout eei tet ttn Renee 6 9 Table 6 3 General bus commands eere 6 11 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 7 Status Structure Table 7 1 Common and SCPI commands to reset registers and clear queues esee 7 4 Table 7 2 Data format commands for reading status registers 7 6 Table 7 3 Status byte and service request enable register commands esee 7 10 Table 7 4 Status byte programming example sese 7 10 Table 7 5 Condition register commands eene 7 17 Table 7 6 Event register commands
266. ure 1 1 Model 2510 front panel KEITHLEY 2510 TEC SourceMeter DISPLAY TOGGLE LOCAL J CONFIG MENU POWER Em i M EXIT JENTER OUTPUT Function keys T Temperature function V Voltage function I Current function R Resistance function EDIT keys A and V Increase decrease displayed value scroll through menu danda Move display cursor left or right Operation keys DISPLAY TOGGLE LOCAL controls CONFIG Press CONFIG and then T V I R EDIT or OUTPUT key to configure function MENU Access and configure Main Menu selections EXIT Cancel selection or back out of menu structures ENTER Accept selection or value Toggle displayed values cancel remote operation restore front panel Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 1 6 Getting Started Annunciators EDIT ERR REM TALK LSTN SRQ AW ARM REAR Power controls OUTPUT POWER Handle Models 2510 and 2510 AT User s Manual Instrument in edit mode Questionable reading invalid cal step Instrument in GPIB remote mode Instrument addressed to talk over GPIB Instrument addressed to listen over GPIB Service request over GPIB Indicates 4 wire sense mode enabled Operations being performed Ground connect mode enabled Setpoint tolerance reached Turns the control source OUTPUT on or off Integrated red green yellow indicator shows heating cooling s
267. us B15 B8 B7 B6 B5 B4 B3 B2 B1 BO Status Enable e coe PON Power On DDE Device Dependent Error 7 1 gure URQ User Request QYE Query Error 2 CME Command Error OPC Operation Complete EXE Execution Error amp Logical AND OR Logical OR Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Status Structure 7 13 Operation event register The used bits of the Operation Event Register shown in Figure 7 5 are described as fol lows Figure 7 5 Bit B0 Calibrating Cal Set bit indicates that the Model 2510 is calibrating Bits B1 through B4 Not used Bit B5 Waiting for Trigger Event Trig Set bit indicates that the Model 2510 is in the trigger layer waiting for a trigger event to occur Bit B6 Waiting for Arm Event Arm Set bit indicates that the Model 2510 is in the arm layer waiting for an arm event to occur Bit B7 Autotune Complete Atc Set bit indicates that the autotune process has been completed Model 2510 AT only Bits B8 and B9 Not used always 0 Bit B10 Idle State Idle Set bit indicates the Model 2510 is in the idle state Bits B11 through B14 Not used Bit B15 Always zero Operation event status stat oper cond stat oper To Operation Summary Bit OSB of Status Byte Register See Figure 7 1 stat oper enab lt NRf
268. us all the front panel controls DCL Device Clear DCL is used to return instruments to some default state Usually instruments return to the power up conditions SPE Serial Poll Enable SPE is the first step in the serial polling sequences which is used to determine which device has requested service SPD Serial Poll Disable SPD is used by the controller to remove all devices on the bus from the serial poll mode and is generally the last command in the serial polling sequence Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual IEEE 488 Bus Overview C 9 Addressed multiline commands Addressed commands are multiline commands that must be preceded by the device listen address before that instrument will respond to the command in question Note that only the addressed device will respond to these commands Both the commands and the address preceding it are sent with ATN true SDC Selective Device Clear The SDC command performs essentially the same function as the DCL command except that only the addressed device responds Generally instruments return to their power up default conditions when responding to the SDC command GTL Go To Local The GTL command is used to remove instruments from the remote mode With some instruments GTL also unlocks front panel controls if they were previously locked out with the LLO command
269. uses eight data lines that transfer data one byte at a time DIO1 Data Input Output through DIOS Data Input Output are the eight data lines used to transmit both data and multiline commands and are bidirectional The data lines operate with low true logic Bus management lines The five bus management lines help to ensure proper interface control and management These lines are used to send the uniline commands ATN Attention The ATN line is one of the more important management lines The state of this line determines how information on the data bus is to be interpreted IFC Interface Clear As the name implies the IFC line controls clearing of instru ments from the bus REN Remote Enable The REN line is used to place the instrument on the bus in the remote mode EOI End or Identify The EOI is usually used to mark the end of a multi byte data transfer sequence SRQ Service Request This line is used by devices when they require service from the controller Handshake lines The bus handshake lines operate in an interlocked sequence This method ensures reliable data transmission regardless of the transfer rate Generally data transfer will occur at a rate determined by the slowest active device on the bus One of the three handshake lines is controlled by the source the talker sending informa tion while the remaining two lines are controlled by accepting devices the listener or lis teners receivi
270. view As discussed in detail in Section 3 the setpoint tolerance feature allows the unit to gener ate an SRQ when the measured temperature is within a certain percent tolerance of the set point for a specific number of readings This feature can be used to generate temperature sweeps as we will now discuss Figure E 1 demonstrates the basic method for generating temperature sweeps Once the temperature stabilizes at the Initial Setpoint a step change is made in the setpoint setting Once the temperature is within the programmed setpoint tolerance the Model 2510 gener ates an SRQ to the computer to indicate that the new setpoint has been reached The pro cess is then repeated for as many steps in the temperature sweep as required Figure E 1 Setpoint tolerance temperature sweep Final Setpoint SRQ Step 2 Change Setpoint SRQ Step 1 Change Setpoint SRQ 8 P Initial Setpoint b Change Setpoint SRQ Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Models 2510 and 2510 AT User s Manual Example Programs E 5 Enabling SRQ on setpoint tolerance To enable an SRQ when the setpoint tolerance has been reached send the following com mands STAT MEAS ENABLE 4096 Enable bit 12 SPT setpoint tolerance in the Measurement Event Enable Register SREI Enable the MSB Message Summary Bit in the Service Request Enable Register See Sec

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