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1. sss 3 5 4 1 P ITransmitter Application uei doo Rr pio oco dI eaa Dono ds 4 3 4 2 TVP Transmitter ADpUCaltiOEH o tuii 4 4 4 5 VIL Transmitter Applica uoi dioe e a a 4 5 4d RED Test Applications 4 6 4 5 RID TransmiuterApplieallOB eiii od o2 adag ha teda 4 7 4 6 Thermocouple Test Application ccccccccccccsceseeceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeens 4 8 4 7 Thermocouple Transmitter Application cccccccccccccccccccceseeeeeeeeeeseeeeeseeseeeeeeeeeess 4 9 4 5 RTD Indicator ADpIICaLtlOD eere torte or tete n diro Con pa Font Pon ett on Iur Cer eres 4 9 Precision Current Trip Application sesesesesssseeeeeeeeeennennnnn nnns 4 10 I IIsolator Transmitter Application eeeeeeeseesseseeeeeeeeeeeennnnnnnnnnnnnnnnnns 4 1 Precision Temperature Measurement with Probe 4 12 Temperature Switch Test Connections esesessesseeeeeeeeeeeeennnnnnnnnnnnnnnnnnnnss 4 13 Pressure Switch Test Connections ccccccccccsssscssessscseccsccnccecscscssssssssscsseessceees S L RS 232 Remote CONN S COU eiui sesaesosUrzes io Forest aeae 352 tial Cav up 7526A Users Manual IEEE 488 GPIB Remote Connection esessssssssseeeeeeeeeneeeneeeenennnnnnnnnn nnn 5 3 5 4 Status Register
2. vili Chapter 1 Introduction le MIS NO IE Contact ETluke Calibration usse ensis saura diea D kezu va R Leslie supe UIS B d IUOS VOI LOI NERIS T Unpack the PrOGUGL um irte tne tot ta rrt rete Standard Options and JACCOSSOEPIGS unisens e Product Desci 8 FrontPanel OVerviE PNT Primary Input Output Primary Input Output Display and Controls eeeeeeusussse Isolated Input Display Controls and Terminals E T E T E E Dinlar Layone RR ERE TE N AITO ETTE T a E I IEE OE O TA E O E EA o E T E E A E E E AA E BOP OS rescore T IR ER RR ERROR General SCC CAO etit ma teat EIS TIR EAE Mead DC Voltage Specifications Output eese DC Voltage Specifications Isolated Input eseeeeeeesesssssee DC Current Specifications Output ssssssssssssesessseeeeeeeee eene nnns DC Current Specifications Isolated Input eseeessssssse Resistance Specifications Output esses Resistance Specifications Input esee Thermocouple Specification Output and Input eeeeeeeeeees RTD and Thermistor Specification Output cccceessssssssssssesseeeeeseeens RTD and Thermistor Specification Input cccccseeesssssesesssssesssssseseeeees Pressure Measurement Specifications
3. ccccccccccceccecesssesseeeeeceeeeeeeeeeeeeaaeaas Switch Test Specifications Isolated Input ssseee 1 1 7526A Users Manual 1 2 Introduction Introduction Introduction The Fluke 7526A Precision Process Calibrator the Product or Calibrator is an accurate full featured temperature pressure and DC calibrator The Calibrator is meant for research and development manufacturing and calibration lab procedures The Product operation is easy and you will quickly understand its operations and features Some time saving features let you Save recall and automatically move through setpoints for each output range Record user defined RTD curves Remotely interface with the Product Contact Fluke Calibration To contact Fluke Calibration call one of the subsequent telephone numbers Technical Support USA 1 877 355 3225 Calibration Repair USA 1 877 355 3225 Canada 1 800 36 FLUKE 1 800 363 5853 Europe 3 1 40 2675 200 Japan 81 3 6714 3114 Singapore 65 6799 5566 China 86 400 8 10 3435 Brazil 55 11 3759 7600 Anywhere in the world 1 425 446 6110 To see product information and download the latest manual supplements visit Fluke Calibration s website at www flukecal com To register your product visit http flukecal com register product 1 1 3 7526A Users Manual Safety Information A Warning identifies conditions and procedures that are dangerous to
4. Chapter 3 Isolated inputs Title Page bird EE d A cee Prossure MPU scion sate caste aaton tonev EEA EEE E EEY I E T BS CO I etc E aie teu E 3 6 3 1 7526A Users Manual 3 2 Isolated Inputs 3 Voltage Input Voltage Input The Product can measure dc voltages from 0 V to 100 V Use these ranges for maximum accuracy 10 V and 100 V 1 Disconnect test leads from external devices 2 Push to select isolated dc voltage and current input mode if not already selected If the necessary dc voltage mode is not shown push again to cycle to the necessary dc voltage mode 3 Connect the unit under test UUT to the isolated voltage current input terminals of the Product as in Figure 3 1 nd Unit Under Test UUT VOLTS LOOP e v DC Voltage Output D gwp017 eps Figure 3 1 Isolated DC Voltage Input Connection Current Input The Product can measure dc current from 0 mA to 50 mA 1 Disconnect test leads from external devices 2 Push to select isolated dc voltage and current input mode if not already selected If the dc current mode is not shown push the key again to go to it 3 Connect the UUT to the isolated voltage current input terminals of the Product as in Figure 3 2 ub m Unit Under Test UUT DC Current Output vous Loop m n D gwp018 eps Figure 3 2 Isolated DC Current Input Connect
5. 7526A Users Manual 6 34 WAI IEEE 480 RS 232 Sequential _ Overlapped This command prevents further remote commands from being executed until all prior remote commands are complete For example if you send an OUT command you can cause the Calibrator to wait until the output has settled before continuing on to the next command if you follow OUT with a WAI command The WAI command is useful with all overlapped commands This prevents the Calibrator from processing other commands until the overlapped command is complete Parameter lt None gt Response lt None gt Example OUT 1 1 V WAT OPER FAULT This example demonstrates setting the Calibrator output to 1 1 volts waiting for the output to become stable before activating the output and checking if the sequence of commands completed successfully ZERO MEAS 158 8 2586 RS 232 Sequential Overlapped This command zeros a pressure module the thermocouple mV offset or the RTD ohms offset For more zeroing instructions for RTD ohms thermocouple millivolts or pressure see Chapter 2 Parameter None for RTD ohms thermocouple millivolts or a pressure module that does not measure absolute pressure value is barometric pressure for absolute pressure modules expressed in the currently selected pressure units Response None Example ZERO MEAS If thermocouple millivolts are currently selected this example zeros the offset Remote Commands 6 Remo
6. Overlapped Clear Status command This command clears the ESR the error queue and the RQS bit in the status byte This command stops pending operation complete commands OPC or OPC Parameter lt None gt Response lt None gt Example CLS This example clears the ESR the error queue and the RQS bit in the status byte ESE IEEE 488 RS 232 Sequential Overlapped Event Status Enable command This command puts a byte into the Event Status Enable ESE register See the Event Status Enable Register ESE description in the Check Product Status section of Chapter 5 Parameter value where value is the decimal equivalent of the ESE byte 0 to 255 Response lt None gt Example ESE 140 This example loads decimal 140 binary 10001100 to enable bits 7 PON 3 DDE and 2 QYE 6 7 7526A Users Manual 6 8 ESE IEEE 488 RS 232 Sequential L Overlapped Event Status Enable query This command shows the contents of the Event Status Enable ESE register See the Event Status Enable Register ESE description in the Check Product Status section of Chapter 5 Parameter Response Example ESR None value where value is the decimal equivalent of the ESE byte 0 to 255 ESE 133 This example shows decimal 133 binary 10000101 which shows that bits 7 PON 2 QYE 1 OPC are enabled x IEEE488 2 2 X Sequential Overlapped Event Statu
7. PTJIS 100 CUIO NI120 YSI 400 OHMS HIGH OHMS LOW SPRT USR DEF x None 100 ohm RTD curve a 0 00385 ohms ohm C 200 ohm RTD curve a 0 00385 ohms ohm C 500 ohm RTD curve a 0 00385 ohms ohm C 1000 ohm RTD curve a 0 00385 ohms ohm C 100 ohm RTD curve a 0 003926 ohms ohm C 100 ohm RTD curve a 0 003916 ohms ohm C 10 ohm RTD empirical curve 120 ohm RTD empirical curve YSI thermistor curve 4000 ohms range 400 ohms range standard PRT with user defined error coefficients only available for measurement RTD with user defined custom coefficients where x is the curve number and ranges from 1 to 5 1 6 USR DEF2 for curve 2 RTD TYPE PTJIS 100 This example puts the RTD sensor to a 100 ohm type with the PT3916 curve a 0 003916 ohms ohm C The resistance of 100 ohms refers to the ice point property the resistance of the RTD at 0 C 32 F RTD TYPE Remote Commands 6 Remote Command List IEEE 488 RS 232 Sequential L Overlapped This command shows the Resistance Temperature Detector RTD sensor type that is in operation for RTD temperature source and measurement Parameter lt None gt Response lt value gt where lt value gt is one of these PT385 100 PT385 200 PT385 500 PT385 1000 PT392 100 PTJIS 100 CUIO NI120 YSI 400 OHMS HIGH OHMS LOW SPRT USR DEF x RTD TYPE PTJIS 100 Example 100 ohm RTD curve a 0 00385 ohms ohm
8. lt None gt lt None gt ST START This example puts the calibrator in switch test mode and starts a new switch test IEEE 488 RS 232 Sequential Overapped In switch test recall mode this command shows the value at which the switch closed Parameter Response Example lt None gt lt value gt lt units gt where lt value gt is the value recorded from the primary display at the time the switch closed and where lt units gt are the units recorded from the primary display at the time the test was done ST CLOSE 5 00000E 01 CEL This example shows the value at which a temperature switch closed in Celsius 6 27 7526A Users Manual 6 28 ST OPEN X IEEE 488 x R5 232 X Sequential L_ Overlapped In switch test recall mode this command shows the value at which the switch opened Parameter Response Example ST DEAD lt None gt lt value gt lt units gt where lt value gt is the value recorded from the primary display at the time the switch opened and where lt units gt are the units recorded from the primary display at the time the test was done ST OPEN 5 53000E 01 CEL This example shows the value at which a temperature switch opened in Celsius IEEE 488 RS 232 Sequential L Overlapped In switch test recall mode this command shows the dead band of the switch Parameter Response Example lt None gt lt value gt lt units gt where lt value gt is t
9. 1 All outputs are positive only 2 Forline voltages less than 95 V 100 ppm of reading Ranges Bandwidth 0 1 to 10 Hz p p Bandwidth 10 Hz to 10 kHz rms uV O mA to 100 000 mA 2000 nA 20 uA DC Current Specifications Isolated Input honda Absolute Uncertainty tcal 5 C Bacon g ppm of reading uA 0 mA to 24 0000 mA Loop Power 0 1 uA 1 Loop Power 24 V 10 2 HART Resistor 250 Q 3 96 1 7526A Users Manual Resistance Specifications Output Absolute Uncertainty Ranges tcal 5 C Ohms Resolution Nominal Current 90 Days 562 to 400 000 Q 0 012 0 015 0 001 Q 1 to 3 mA 5 KQ to 4 00000 kQ 0 01 Q 100 pA to 1 mA 1 For currents lower than shown the specification becomes New Spec Stated Spec x Imin lactual For example a 500 uA stimulus that measures 100 Q has a specification of 0 015 Q x 1 mA 500 uA 0 03 Q Resistance Specifications Input Absolute Uncertainty tcal 5 C Ranges ppm of reading Q Resolution Stimulus Current 90 Days 0Qto 400 0002 20 ppm 0 00359 20ppm 0 004Q 0 0010 0 KQ to 4 00000 kQ 20 ppm 0 035 Q 20 ppm 0 04 Q 1 20 Introduction 1 Specifications Thermocouple Specification Output and Input Output Input Absolute Uncertainty tcal 5 C C Range C TC Type Minimum Maximum _ 90 days 600 C 800 C 1550 C 0 C 1000 C 1800 C 2000 C C 200 C 100 C 50 C 25 C 0 C 1
10. C 200 ohm RTD curve a 0 00385 ohms ohm C 500 ohm RTD curve a 0 00385 ohms ohm C 1000 ohm RTD curve a 0 00385 ohms ohm C 100 ohm RTD curve a 0 003926 ohms ohm C 100 ohm RTD curve a 0 003916 ohms ohm C 10 ohm RTD empirical curve 120 ohm RTD empirical curve YSI thermistor curve 4000 ohms range 400 ohms range standard PRT with user specified error coefficients only available for measurement RTD with user specified custom coefficients where x 15 the curve number and ranges from 1 to 5 1 6 USR DEF2 for curve 2 This example 15 an indication that the RTD sensor type is a 100 ohm RTD with curve a 0 3916 ohm C 6 25 7526A Users Manual 6 26 SRE IEEE 488 R5 232 Sequential Overlapped Service Request Enable command This command puts a byte into the Service Request Enable SRE register See the Service Request Enable Register SRE description in the Check Product Status section of Chapter 5 Since bit 6 1s not used decimal value 64 the maximum entry is 255 64 191 Parameter value where value is the decimal equivalent of the SRE byte 0 to 191 Response lt None gt Example SRE 48 This example enables bits 4 MAV and 5 ESB SRE IEEE 488 RS 232 Sequential Overlapped Service Request Enable query This command shows the byte in the Service Request Enable Register SRE See the Service Request Enable Register SRE description the Check Product Status secti
11. MES uos TT Me 153 Lane Voltage Sell eed ended eae 2 1 Default Custom RTD Coefficients ie e rette eere t rrt ena eder net 2 2 Other Common RTD Coefficients ceret eed eH ndr arte dd e dr YER eU Eds 2 3 Fluke 700 SeniesPressure Modules eee rtt eh ee tre Ee edixit 2 4 Fluke 525A P Series Pressure Modules ccccccccccccccccececeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 5 1 Operating State M BC IONS NETT 5 2 RS 232 Emulation of IEEE 488 Messages esses 3 9 Commands Tor RS 232 Only eieaeitatsnietasSasseshuisaekaatava chu tus dex 5 4 Units Accepted in Parameters and Used in Responses eeeeuueuuse S 550 Status Register Summary asesir verts esa Eas 5 7 Serial Poll Status Byte STB and Service Request Enable SRE Registers 5 8 Event Status Register ESR and Event Status Enable ESE Registers 6l Common Commands Rm 6 2 External Connection Commands sees 6 5 OBIDUCC OPIDO 6 3 Measurement Commands eeomaseeseeete arret neuro 6 5 153 232 Operation Mode Commands eene MEME C CAE DEM NERO mU O Fror ERR JL Replacement FUSES aurrian an aana a EN aes a NE 7526A Users Manual yi
12. The values in the cycled group of setpoints must be keyed in with this in mind Random setpoints used for individual checks can then be found after the usual end setpoint number Isolated Inputs 3 Output Setpoints To recall a setpoint 1 Select the output mode 2 Push and 2 to select the RECALL function 3 Atthe setpoint number selection prompt RECALL SPT push the numeric key 1 to 9 for the setpoint to be recalled To start an automatic setpoint cycle 1 Select the output mode 2 Push and 3 to select the AUTOSET function 3 Atthe end setpoint number selection prompt AUTO SET POINT push the numeric key 1 to 9 for the end setpoint number for the cycle 4 Atthe dwell time prompt DWELL TIME 5 500 record the number of seconds 5 to 500 to dwell at each setpoint value followed by ee 5 can be used at any time during the cycle without stopping it 6 Push the other Product keys to stop the cycle 3 7 7526A Users Manual 3 8 Chapter 4 Application Notes Title Page Eala EMi enn a e ettet ettet uu A A TE E 4 3 oe Fes cease ett toto tiet inea tei eletti ode mte ia 4 3 DP TESISIHICE eeu EE eam U totem 4 4 NT 4 5 4 6 RID EAN 4 7 Thermocouple CSE ETENE 4 8 Thermocouple 4 9 ETD ICO E A vie EA E ET AE EETA ET OA ETE 4 10 Precision C Urren TAD eenid asii da aa tie abdo ener adia 4 11 DI 150 AGO
13. i ule lhe C gwp013 eps Figure 2 4 RTD Q Output Connection 2 6 Primary Inputs and Outputs 2 Resistance Temperature Detector RTD with Custom Coefficients 6 Push and 6 to toggle the RTD display between F and C 7 Use the numeric keypad to type the necessary output value and push ever 10 As an alternative use or D to select a digit to change followed by amp or 9 to ramp the digit up or down This method gives you a simple solution when small changes to an output value are necessary or if is necessary to increment or decrement decades When RTD Q mode is first selected the Product is put into standby Stby mode which puts the positive output jack into a high impedance condition 7100 k Q for safety To put the output into the active condition push to toggle between the standby and operate modes Resistance Temperature Detector RTD with Custom Coefficients The Product can store coefficients for a maximum of five custom RTD curves To key in the coefficients for a custom RTD curve 1 Select RTD measure or source mode as given in the Resistance Temperature Detector RTD and Ohms Measure or Resistance Temperature Detector RTD and Ohms Source sections of this chapter Push until the USR DEF type is selected Push to show the curve selection prompt RTD CUSTOM 1 5 Push the numeric key that goes with the custom RTD curve to be keyed in At the SET 1 RECALL 2
14. 120 V for line voltages between 100 V 7 3 7526A Users Manual 7 4 and 120 V 10 about setting or that the selector is set to 240 V for line voltages between 220 V and 240 V 10 about setting
15. 4 C MMH2020C millimeters of water at 20 C BAR bars MBAR millibars KPA kilopascals MPA megapascals INHG inches of mercury at 0 C MMHG millimeters of mercury at 0 C KG CM2 kilograms per square centimeter Response lt None gt Example ISO PRES UNIT BAR This example sets the isolated pressure unit to bars ISO PRES UNIT This command shows the isolated pressure unit Remote Commands 6 Remote Command List X IEEE 488 x R5 232 X Sequential L_ Overlapped Parameter lt None gt Response lt value gt where lt value gt is one of these PSI pounds per square inch INH204C inches of water at 4 C INH2020C inches of water at 20 C INH2060F inches of water at 60 F CMH204C centimeters of water at 4 C CMH2020C centimeters of water at 20 C MMH204C millimeters of water at 4 C MMH2020C millimeters of water at 20 C BAR bars MBAR millibars KPA kilopascals MPA megapascals INHG inches of mercury at 0 C MMHG millimeters of mercury at 0 C KG CM2 kilograms per square centimeter Example ISO PRES UNIT BAR This example is an indication that the isolated pressure unit is bars LOCAL IEEE 488 RS 232 Sequential Overlapped This command puts the Calibrator into the local condition clearing the remote condition see the REMOTE command and the front panel lockout condition see the LOCKOUT command It duplicates the condition of when the IEEE 488 REN line to false Parameter lt None gt Response lt No
16. Characters In the command descriptions parameters are shown isolated by spaces One space after a command 15 necessary unless no parameters are necessary All other spaces are optional Spaces are put in for clarity in the manual and can be left in or left out as necessary You can put more spaces or tabs between parameters as necessary More spaces in a parameter are typically not permitted You can have more spaces between a number and its related multiplier or unit 4 Terminators Table 5 5 summarizes the terminator characters for both the IEEE 488 and the RS 232 remote interfaces Table 5 5 Terminator Characters ASCII Character Control Language Terminator Command Command Program Terminator Terminator Carriage Return CR Chr 13 Cntl M Line Feed LF Chr 10 Cntl J Function Backspace BS 8 Che Cnt H Form Feed FF Chr 12 lt Cntl gt L f Examples RS 232 Mode terminal OUT 1 V lt Enter gt RS 232 Mode program Comm1 Output OUT 1 V Chr 10 IEEE 488 Mode OUT 1 V IEEE 488 interface The Product sends the ASCII character Carriage Return with the EOI control line held high as the terminator for response messages The Product recognizes the subsequent as terminators when found in incoming data e ASCII CR character All ASCII character sent with the EOI control line asserted RS 232 interface The Product sends a Carriage Return CR character as the terminator for response messages The
17. It also shows Opr on the display 6 15 7526A Users Manual 6 16 OPER X IEEE 488 x R5 232 x Sequential L_ Overlapped This command shows the current operate standby mode setting Parameter Response Example OPT None value where value is 1 for operate mode and 0 for standby mode OPER I This example is an indication that the Calibrator is in operate mode IEEE 488 RS 232 Sequential Overlapped This command shows a list of the installed hardware and software options This command 15 reserved for future use Parameter Response Example None text string where text string is 0 if no options are installed or a list of installed options separated by commas OPT 0 The example is an indication that no options are installed Remote Commands 6 Remote Command List OUT IEEE 488 R5 232 L Sequential Overlapped This command sets the output mode and value of the Calibrator To source a temperature select the necessary mode and sensor parameters first with the TSENS TYPE RTD_TYPE and TC_TYPE commands Use the multiplier prefixes k for kilo m for milli and u for micro with the OUT command units as necessary The unit can be ignored if the output mode is not to be changed Parameter value units where value is the output value to be made and where units is one of the items below with a possible prefix multiplier k m or u a
18. OV M 0 TPUT V MAX V PK vo mA 100 mA MAX 0 o 1 1 lo gwp011 eps Figure 2 2 DC Current Output Connection 5 Use the numeric keypad to type the necessary output value and push ever As an alternative use or QO cursor key to select a digit to change followed by or to move the digit up or down This method gives you a simple solution when small changes to an output value are necessary or if is necessary to increment or decrement decades 6 When dc current mode is first selected the Product is put into standby Stby mode which puts the positive output jack into a high impedance condition 2100 k Q for safety To put the output into the active condition push to toggle between the standby and operate modes The standby mode also operates in these situations e No connection made to the output terminals e The voltage compliance is larger than a given output current The Product has a typical voltage compliance of 10 V This is so that the 4 mA 20 mA application loads to a maximum of 500 Q can be driven At maximum current of 100 mA the maximum load is 100 Q 2 4 Primary Inputs and Outputs 2 Resistance Temperature Detector RTD and Ohms Measure Resistance Temperature Detector RTD and Ohms Measure The Product can measure all common RTD types 5 custom RTD curves and a custom SPRT in F or C plus basic resistance from 0 Q to 4000 Q The Product uses these common RTD t
19. Product recognizes the subsequent as terminators when found in incoming data ASCII CR character ASCII LF character 5 Incoming Character Processing The Product processes all incoming data as follows The most significant data bit DIOS 15 ignored All data is read as 7 bit ASCII Lower case or upper case characters are accepted with lower case changed to upper case before they are used LCD and Remote Interface Setup Procedures 5 Command Use 6 Response Message Syntax In the complete command descriptions in Chapter 6 the responses from the Product are given where applicable To know what type of data to read in refer to the start of the response description for the command Check Product Status Figure 5 4 shows the status registers enable registers and queues in the Product which show different conditions in the Product Some registers and queues are specified by the IEEE 488 2 standard while the others are only for the Product With the status registers the Service Request SRQ control line and a 16 element buffer the Error Queue also give status information E Data _ Available Read using ESR Output Buffer Event Status EnableRegister m CUm Read using ESE Write using ESE Error Queue Read using ERR 4 Read by Serial Poll Status Byte Register 4 Read using STB IEEE bus Service Request 71 lt 1514 3 2 1 0 Enable Register Read using SRE Write using SRE gwp033 eps Figu
20. key to select the function Select Celsius or Fahrenheit units for RTD and Thermocouple temperature measurements Set a new value for a preset output setpoint as given in Chapter 3 Output Setpoints RECALL 3j Recall a preset output setpoint as given in Chapter 3 Output Setpoints pole Start automatic stepping of preset output setpoints as given in 3 Chapter 3 Output Setpoints RNG LOCK SHIFT RS Select Auto range or Range Lock for voltage output Push to regain local control of the Product after the remote command REMOTE is received In this case all keys but this one are ignored When the remote command LOCKOUT is received all keys are ignored This includes this key The remote command LOCAL must be received to regain local control Push during entry of a RTD custom curve coefficient to start entry of the exponent Function Keys VOLTS Select dc voltage or current output mode and toggle between them RE Select Thermocouple or RTD Ohms input output mode and toggle between them Select Pressure input mode In Thermocouple mode move through the thermocouple types this includes millivolts In RTD Ohms mode move through the RTD types this includes ohms in Pressure mode move through the pressure units Figure 1 3 Primary Input Output Display and Controls cont Introduction Product Description Function Keys For all but Thermocouple output modes toggle between Stand
21. mA OUTPUT INPUT ZER VOLTS VOLTS LOOP rg CIC EX INPUT OUTPUT SET DISPLAY CJC 3 RECALL AUTOSET E A HI C mA TC SHIFT ENTER RNGLOCK LOCAL EXP cI CJ Ee gwp034 eps Figure 4 13 Pressure Switch Test Connections Application Notes 4 Thermocouple Transmitter To do the pressure switch test To go to the switch test mode push and hold for 3 seconds Connect the Calibrator to the switch Use the isolated terminals The polarity of the terminals is not important Connect the pump to the Calibrator and the pressure switch Make sure the vent on the pump is open Zero the Calibrator if necessary Close the vent after you zero the Calibrator The top of the isolated display will read CLOSE Apply pressure with the pump slowly until the switch opens Note When you pressurize the device under test it must be done slowly to make sure the readings will be accurate gwp065 eps When the switch is open OPEN will be shown Bleed the pump slowly until the pressure switch closes The top of the isolated display will now read SW OPENED AT and show at what pressure that the switch opened gwp066 eps gwp067 eps 7526A Users Manual 10 Push the NEXT option to see when the switch closed and the deadband Note The previous example uses a normally closed switch wp068 eps gwp069 eps The basic procedure is the same for a normally open
22. module PSI pounds per square inch in H2O 4 C inches of water at 4 degrees Celsius in H2O 20 C inches of water at 20 degrees Celsius in H2O 60 C inches of water at 60 degrees Fahrenheit cm H20 4 C centimeters of water at 4 degrees Celsius cm H20 20 C centimeters of water at 20 degrees Celsius mm H2O 4 C millimeters of water at 4 degrees Celsius mm H20 20 C millimeters of water at 20 degrees Celsius BAR bars mBAR millibars kPa kilopascals MPa megapascals in HG 0 C inches of mercury at 0 degrees SE mm HG 0 C millimeters of mercury at 0 degrees Celsius kg cm2 kilograms per square centimeter Switch Test Specifications Isolated Input Contact Closure Resistance Excitation Current 27 mA Max Chapter 2 Primary Inputs and Outputs Title aeta tM tue Me Bes ME i a a a an r d E E Resistance Temperature Detector RTD and Ohms Measure Resistance Temperature Detector RTD and Ohms Source Resistance Temperature Detector RTD with Custom Coefficients Standard Platinum Resistance Thermometer SPRT Coefficients Thermocouple TC Measure eeeeeesseseseeeeeeeee enne nnn nnnnnnn nnn nnn nnn nnns ns Thermocouple C De ISOUEGE oou eter tad antici tat Rep d axem nth EER IESG SPIES ASL OG eiae ciui vio ie sel Rave dudas Coss Q ainitesdasetnanedsrac
23. panel controls are locked out The left end of the top line of the display changes to rem To change the Product to the local with lockout state send the RS 232 LOCAL command or the IEEE 488 GTL Go To Local message 5 6 LCD and Remote Interface Setup Procedures IEEE 488 Interface Overview Table 5 1 gives the possible operation state transitions For more information about IEEE 488 GPIB messages see the IEEE 488 Interface Overview section of this chapter Table 5 1 Operating State Transitions Frm To Front Panel GPIB Message Serial Command re Remote MLA REN REMOTE Local with Lockout True LLO LOCKOUT Local GTL or REN Remote Remote with Local 0 key False LOCAL LOCKOUT Lockout LLO Local REN False Remote with MLA REN LOCAL REMOTE Lockout True Local with Lockout Remote with Local REN False Lockout Local with Lockout GTL IEEE 488 Interface Overview The IEEE 488 parallel interface sends commands as data and receives measurements and messages as data The maximum data exchange rate is 1 Mbyte per second with a maximum distance of 20 meters for the full length of the cable connections One cable must not be more than 4 meters Some commands are used only for RS 232 serial operation because these functions must be implemented as IEEE uniline single control line bus management messages per the IEEE Standards For example the command REMOTE can be sent as data over the IEEE 488 interface to put the Pr
24. prompt push _1_ to select custom RTD curve data entry uec ur qe 6 Atthe ENTER MIN TEMP prompt key in the minimum temperature limit for the custom RTD curve and push enren 7 Atthe ENTER MAX TEMP prompt key in the maximum temperature limit for the custom RTD curve and push enres 8 Atthe ENTER RO prompt key in the nominal resistance value RO for the custom RTD curve and push 9 Atthe ENTER COEFF A prompt key in the first A coefficient for the custom RTD curve and push ee To key in a coefficient that includes an exponent key in the mantissa push and to select the EXP function key in the exponent and push eres 10 When prompted key in the second B and third C coefficients in the same manner 11 To abort the curve entry without stored changes push J To use a custom RTD curve 1 Select RTD measure or source mode as given in the Resistance Temperature Detector RTD and Ohms Measure or Resistance Temperature Detector RTD and Ohms Source sections of this chapter Push until the USR DEF type is selected Push to show the curve selection prompt RTD CUSTOM 1 5 Push the numeric key that goes with the custom RTD curve to be used At the SET 1 RECALL 2 prompt push _2_ to recall the custom RTD curve coefficients P a 29 d 2 7 7526A Users Manual 6 To use a different custom RTD curve push two times to show the USR DEF selection prompt The USR DEF func
25. the thermocouple as shown in Figure 4 6 To verify the thermocouple refer to the thermocouple documentation Temperature Chamber 75264 PRECISION PROCESS CALIBRATOR mA RTD O 100mA MA OUTPUT 0 mA MAX Thermocouple HI HI 100 gwp025 eps Figure 4 6 Thermocouple Test Application Application Notes 4 Thermocouple Transmitter Thermocouple Transmitter 1 Disconnect test leads from external devices 2 Select thermocouple output on the primary display as given in the Thermocouple TC Source section of Chapter 4 Select the correct thermocouple type for the transmitter 4 Select current input on the isolated display as given in the Current Input section of Chapter 5 5 Select the isolated loop power option If a HART communicator is necessary for set up of the transmitter select HART Connect the transmitter as shown in Figure 4 7 To verify and calibrate the transmitter refer to the transmitter documentation 7526A PRECISION PROCESS CALIBRATOR INPUT LO 100 V PK MAX Documenting Process Calibrator gwp026 eps Figure 4 7 Thermocouple Transmitter Application 4 9 7526A Users Manual RTD Indicator 1 Disconnect test leads from external devices 2 Select RTD output on the primary display as given in the Resistance Temperature Detector RTD and Ohms Source section of Chapter 4 Select the correct RTD type for the indicator 4 Connect the indicator as shown in
26. 0 012 C 0 018 C 0 022 C Pt 385 100 Q 0 025 C 0 031 C 0 037 C 0 012 C 0 014 C 0 016 C Pt 3926 100 Q 0 022 C 0 022 C 0 024 C 0 009 C 0 012 C 0 014 C 0 016 C Pt 3916 100 2 0 021 C 0 024 C 0 030 C 0 031 C 0 047 C 0 050 C 0 053 C Pt 385 200 Q 0 054 C 0 062 C 0 064 C 0 079 C 0 023 C 0 026 C Pt 385 500 Q 0 031 C 0 035 C 0 041 C 0 014 C 0 017 C Pt 385 1000 Q 0 022 C 0 024 C 0 031 C 1 4 wire mode Uncertainties shown do not include probe uncertainties 2 Based on MINCO Application Aid No 18 1 Year 0 013 C 0 020 C 0 024 C 0 026 C 0 033 C 0 038 C 0 013 C 0 015 C 0 017 C 0 022 C 0 026 C 0 032 C 0 010 C 0 013 C 0 015 C 0 017 C 0 022 C 0 026 C 0 031 C 0 033 C 0 053 C 0 056 C 0 060 C 0 060 C 0 069 C 0 071 C 0 088 C 0 025 C 0 028 C 0 034 C 0 038 C 0 045 C 0 015 C 0 018 C 0 024 C 0 026 C 0 033 C Introduction Specifications 1 1 23 7526A Users Manual 1 24 Pressure Measurement Specifications The Calibrator can accept the Fluke 700 or 525A P Series pressure modules Pressure modules connect directly into the front panel Lemo connector with the Calibrator firmware auto detecting the type and value of the module you connect Accuracy and Resolution Units Determined by the pressure module Determined by the pressure
27. 00 C 400 C 600 C 1000 C 1600 C EN E 800 C 1550 C 1820 C 1000 C 1800 C 2000 C 2316 C 200 C 100 C 0 C 600 C 1000 C 100 C 800 C 1200 C 200 C 100 C 500 C 800 C 1372 C 100 C 900 C 200 C 100 C 0 C 100 C 800 C 1300 C 25 C 0 C 100 C 400 C 600 C 1000 C 1600 C 1767 C 1 Year 0 10 C 0 09 C pes os 0 51 C e 0 C 0 43 C a 100 C 0 38 C te 400 C 0 29 C a 400 C 600 C 0 23 C 600 C 1000 C ades 1000 C 1600 C ene 1600 C 1767 C 0 26 C 1 21 7526A Users Manual Absolute Uncertainty tcal 5 C C Range C ge C Output Input 0 C 200 C 200 C 600 C 600 C 800 C 800 C 1600 C 1600 C 2000 C 2000 C 2500 C Does not include thermocouple wire error Type B E J K N R S and T are based on ITS 90 Type L and U are based on DIN 43710 1985 Type C is based on ASTM standard E 988 96 Type XK and BP are based on GOST R 8 585 2001 RTD and Thermistor Specification Output Range C Absolute Uncertainty tcal 5 C C a Minimum 1 Year 90 Days 200 C 400 C 0 35 C 0 40 C E 400 C 630 C 0 42 C 0 50 C 200 C 1 2 wire output 2 Based on MINCO Application Aid No 18 1 22 RTD and Thermistor Specification Input Absolute Uncertainty tcal 5 C C Range C RTD Type ge C
28. 2 Select current output on the primary display as given in the DC Current Output section of Chapter 4 3 Select pressure input on the isolated display as given in the Pressure Input section of Chapter 5 4 Connect the transmitter as shown in Figure 4 2 To verify and calibrate the transmitter refer to the transmitter documentation 7526A PRECISION PROCESS CALIBRATOR Calibration RTD O 100 hen MAX OUTPUT OUTPUT e 100V VOLTS LOOP Q INPUT OUTPUT b T ER 4W us pe D A n INPUT Q9 Pressure Module Supply Pressure gwp021 eps Figure 4 2 I P Transmitter Application Application Notes 4 V I Transmitter V I Transmitter 1 Disconnect test leads from external devices 2 Select voltage output on the primary display as given in the DC Voltage Output section of Chapter 4 3 Select current input on the isolated display as given in the Current Input section of Chapter 5 Select the isolated loop power option 4 Connect the transmitter as shown in Figure 4 3 To verify and calibrate the transmitter refer to the transmitter documentation 75264 PRECISION PROCESS CALIBRATOR An TC INPUT OUTPUT pee 20V PK MAX INPUT to 100 V PK MAX pe ne gwp022 eps Figure 4 3 V I Transmitter Application 4 5 7526A Users Manual RTD Test 1 Disconnect test leads from external devices 2 Select RTD input on the primary display
29. ANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES INCLUDING LOSS OF DATA ARISING FROM ANY CAUSE OR THEORY Since some countries or states do not allow limitation of the term of an implied warranty or exclusion or limitation of incidental or consequential damages the limitations and exclusions of this warranty may not apply to every buyer If any provision of this Warranty is held invalid or unenforceable by a court or other decision maker of competent jurisdiction such holding will not affect the validity or enforceability of any other provision Fluke Corporation Fluke Europe B V P O Box 9090 P O Box 1186 Everett WA 98206 9090 5602 BD Eindhoven U S A The Netherlands 11 99 Table of Contents Chapter Title 1 OdG OT rer Ta e Oe OTT Contact Fluke Calibration cccccssscccccccccecessssseeeessssnneeeeeeeeeeeeeesssseeeeessssaaees Standard Options and Accessories cccccccccscceceeeeeeececeeeeececceeceeeceeeeeeeceeeeceeeeeeeeeeeeeeeeeeees Product DeseriDbOH es ocoacoberesestes ioannis vases inda er iced Mesa MS ME TTT Primary Input Output Primary Input Output Display and Controls sueeueuu
30. Calibrator and pressure modules with a soft cloth dampened with water or mild soap and water Replace a Line Fuse The line power fuses and line voltage selector are found in the compartment above the power switch on the right rear side of the Calibrator See the rear panel layout in Chapter 1 Table 7 1 shows the correct replacement fuse for each line voltage setting Table 7 1 Replacement Fuses Fuse Description Line Voltage Setting A 0 25 A 250 V SB 120 V 100 V to 120 V 10 about setting A 0 125 A 250 V SB 220 V 198 V to 240 V 10 96 about setting AATo ensure safety use exact replacement only To examine or replace a fuse 1 Disconnect the line power 2 Use the blade of a flat screwdriver to pry up the tab at the base of the line fuse compartment Insert the blade into the center slot under the tab The compartment cover will come part way out 3 Remove the compartment cover The fuses come out with the compartment cover and can easily be examined or replaced 4 To install the fuse holder push the compartment cover back into the compartment until the tab locks in position Change the Line Voltage The Calibrator comes from the factory configured for the line voltage applicable for the country of purchase or as specified when it 1s ordered To verify the line voltage setting examine the line voltage indicator on the power line fuse compartment cover Make sure that the line voltage selection 15 set for
31. Ctrl Q character when it has processed a sufficient part of the input buffer so that it is less than 40 full Introduction Command Summary by Function Error Code List Remote Command List Chapter 6 Remote Commands 6 1 7526A Users Manual 6 2 Remote Commands Introduction Introduction Remote commands duplicate actions that can be started from the front panel in local operation mode After the summary table 15 a complete alphabetical list of all commands complete with protocol information Headings in the alphabetical list give the parameters and responses plus an example for each command For information on how to use the commands see Chapter 5 Command Summary by Function See the subsequent tables for command summary function information Table 6 1 Common Commands Clear status Clears the ESR the error queue and the RQS bit in the status byte This command stops all pending operation complete commands OPC or OPC Puts a byte into the Event Status Enable register Shows the contents of the Event Status Enable register Shows the contents of the Event Status register and clears the register Identification query Shows the manufacturer model number serial number l and firmware revision level of the Calibrator Sets bit O OPC for Operation Complete in the Event Status Register to 1 when all pending device operations are complete Shows a 1 after all subsequent operations are complete This com
32. Device Dependent Commands Device dependent commands are unique to the Product An example of a device dependent command is OUT 1 V This command tells the Product to source 1 V dc 1 Common Commands Common commands are specified by the IEEE 488 2 standard and are common to most bus devices Common commands start with an asterisk Common commands are available if you use the IEEE 488 or RS 232 interface for remote control An example of a common command is IDN This command tells the Product to show the instrument identification string 2 Query Commands Query commands requests for information which can be shown as the command operates or can be put in a buffer until it is necessary later Query commands end with a question mark An example of a query commands is RANGE This command tells the Product to show the current DC voltage output range 3 Interface Messages IEEE 488 Interface messages control traffic on the IEEE 488 interface bus Device addressing and clearing data handshaking and commands to put status bytes on the bus are all directed by interface messages Some of the interface messages occur as state transitions of dedicated control lines The remaining interface messages are sent through the data lines with the ATN signal true All device dependent and common commands are sent through the data lines with the ATN signal false An important thing about interface messages 1s that unlike device dependent and c
33. Figure 4 8 To verify and calibrate the indicator refer to the indicator documentation 7526A PRECISION PROCESS CALIBRATOR alibration ei 135 78 C 35 78 C 2 Wi re RTD mA R Indicator 1 2 55 135 78 C 9 Wire RTD 3m Indicator 4W RTD O INPUT 1 O i 2 4 Wire RTD CURRENT SENSE L Sr 135 78 C Indicator 4 O gwp027 eps Figure 4 8 RTD Indicator Application 4 10 Application Notes 4 Thermocouple Transmitter Precision Current Trip 1 Disconnect test leads from external devices 2 Select current output on the primary display as given in the DC Current Output section of Chapter 4 3 Select voltage input on the isolated display as given in the Voltage Input section in Chapter 5 4 Connect the trip as shown in Figure 4 9 To verify and calibrate the trip refer to the trip documentation 7526A PRECISION PROCESS CALIBRATOR VOLTS LOOP rg e INPUT OUTPUT Au INPUT 5V Bench Power Supply gwp028 eps Figure 4 9 Precision Current Trip Application 7526A Users Manual I Isolator Transmitter 1 Disconnect test leads from external devices 2 Select current output on the primary display as given in the DC Current Output section of Chapter 4 3 Select current input on the isolated display as given in the Current Input section of Chapter 5 4 Select the isolated loop power option Connect the transmitter as shown in Figure 4 10 6 To verify and c
34. IT Last selected RANGE 0 1 V RTD TYPE Last selected SIBY No output TC REF INT TC TYPE Last selected TSENS TYPE Last selected The isolated display and selections stay as they were last selected Parameter None Response lt None gt Example RST This example resets the Calibrator invoking the commands and values shown above RTD MEAS IEEE 488 RS 232 Sequential L Overlapped This command puts the primary display in RTD measure mode Parameter lt value gt where lt value gt is one of the these CEL display in degrees Celsius FAR display in degrees Fahrenheit lt None gt display in the last selected temperature unit Response lt None gt Example RTD MEAS CEL This example puts the Calibrator to RTD measure mode and shows in degrees Celsius 6 23 7526A Users Manual 6 24 RTD TYPE IEEE 488 x RS 232 Sequential Overlapped This command sets the Resistance Temperature Detector RTD sensor type for RTD source and measure Typically before you use the RTD TYPE command to select the RTD type use the TSENS TYPE command to select RTD mode and afterwards set the output temperature with the OUT command if applicable A change in temperature sensors sets the output to 0 C Note that the SPRT can only be used to measure signals not source them Parameters Response Example value where value is one of the these PT385 100 PT385 200 PT385 500 PT385 1000 PT392 100
35. July 2012 2012 Fluke Corporation All rights reserved Specifications are subject to change without notice All product names are trademarks of their respective companies Calibration 326A Precision Process Calibrator Users Manual LIMITED WARRANTY AND LIMITATION OF LIABILITY Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service The warranty period is one year and begins on the date of shipment Parts product repairs and services are warranted for 90 days This warranty extends only to the original buyer or end user customer of a Fluke authorized reseller and does not apply to fuses disposable batteries or to any product which in Fluke s opinion has been misused altered neglected contaminated or damaged by accident or abnormal conditions of operation or handling Fluke warrants that software will operate substantially in accordance with its functional specifications for 90 days and that it has been properly recorded on non defective media Fluke does not warrant that software will be error free or operate without interruption Fluke authorized resellers shall extend this warranty on new and unused products to end user customers only but have no authority to extend a greater or different warranty on behalf of Fluke Warranty support is available only if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable international pr
36. List of Figures Figure Title AO ducit ER TRE UU 1 2 Primary 1 3 Primary Input Output Display and Controls eeseeesseeseesuesss 1 4 Isolated Input Display Controls and Terminals sees NEM RR T m 1 6 Primary Voltage and Current Display eee 1 7 Primary Thermocouple and RTD Display essen 1 8 Primary and Isolated Pressure Display sss 1 9 Isolated Voltage and Current Display sssssss 2 1 DC Voltage Output Connections sssssseenneeemennnenen nnne 2 2 DC Current 2 9 RTD O Input Come CUO esequi etr UI qoi IDUNUG CUM etus EREA PR Tor dU IM 24 RIVO ConnectlOlls eae Ie er a NU ett d eer ba ear de 2 5 Thermocouple Input Connectoti ieeertie trt ne teeth hee tenebe she tesa eg nues 2 6 Thermocouple Output Connection ccccccccccccccccccccccccccceceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 2 7 Pressure Module Connection iisoeise sess ctas sor aeuoas ae ike a aa 3 Isolated DC Voltage Input Connection ccccccccccccccccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeees EE 3 2 Isolated DC Current Input Connection ccccccccccccccececceeeeeeeeeeeeeeeeeeeeeeeeeeeeeees KEEN 3 3 Isolated Pressure Module Connection sss 3 4 3 4 Swich Test and Pressure Module Connections
37. PROCESS CALIBRATOR VOLTS RTD O A 100 mA MAX OUTPUT URU OUTPUT INPUT ZERO MAX VOLTS STBY mas DISPLAY CJC C F TA W RTD O RID INPUT SET RECALL AUTOSET E 2 E RNGLOCK LOCAL EXP CURRENT i i C C3 pr E a Ws RTD Probe i Temperature A Switch gwp054 eps Figure 4 12 Temperature Switch Test Connections Application Notes 4 Thermocouple Transmitter To go to the switch test mode push and hold for three seconds Connect the Calibrator to the switch with the isolated terminals The polarity of the terminals 15 not important The top of the isolated display will read CLOSE Increase the temperature slowly until the switch opens gwp060 eps When the switch opens OPEN will be shown Decrease the temperature slowly until the switch closes At the top of the isolated display it will now read SW OPENED AT and show the temperature that the switch opened at Push to see when the switch closed and the deadband gwp061 eps gwp062 eps gwp063 eps gwp064 eps 8 Push to get to the main menu Clear the data and do another test 4 15 7526A Users Manual Note The last example uses a normally closed switch The basic procedure is the same for a normally open switch but the display will read OPEN as an alternative to CLOSE Pressure Switch Test The connections for this test are shown in Figure 4 13 7526A PRECISION PROCESS CALIBRATOR
38. S is 1 the Product asserts the SRQ control line on the IEEE 488 interface You can do a serial poll to read this bit to see if the Product is the source of an SRQ Master Summary Status Set to 1 when bits ESB MAV EAV or ISCB are 1 and enabled 1 in the SRE This bit can be read with the STB Remote command in in place of a serial poll Set to 1 when one or more ESR bits are 1 Message Available The MAV bit is set to 1 when data is available in the IEEE 488 interface output buffer of the Product Error Available An error has occurred and an error is available to be read from the error queue with the FAULT query Service Request SRQ Line IEEE 488 Service Request SRQ is an IEEE 488 1 bus control line that the Product asserts to tell the controller that some type of service is necessary Many instruments can be on the bus but they all share one SRQ line To find which instrument set SRQ the Controller typically does a serial poll of each instrument The calibrator asserts SRQ when the RQS bit in its Serial Poll Status Byte is 1 This bit tells the controller that the Product was the source of the SRQ The Product clears SRQ and RQS when the controller host does a serial poll sends CLS or when the MSS bit is cleared The MSS bit is cleared only when ESB and MAV are 0 or they are disabled when their related enable bits in the SRE register are set to 0 Service Request Enable Register SRE The Service Request Enable Regist
39. Selects the internal temperature sensor or an external reference value for cold TC REF l z junction compensation of thermocouple TC source and measurement Shows the source of the temperature that is used for cold junction TC REF compensation of thermocouple TC source and measurement TC TYPE Sets the thermocouple TC type TC TYPE Shows the thermocouple TC type TSENS TYPE Sets temperature mode RTDor TC TSENS TYPE Shows the temperature mode Table 6 3 Output Commands OPER Starts the Calibrator output if it is in standby mode OPER Shows the operate standby mode setting Sets the output of the Calibrator LOOP POWER Sets the output of the Calibrator o Locks the current output range for voltage only Remote Commands Command Summary by Function Table 6 4 Measurement Commands ISO MEAS Sets the isolated input measurement type PRES Queries the connected pressure module for its manufacturer and serial number PRES MEAS Changes the operation mode of the primary display to pressure 7 measurement RTD MEAS Changes the operation mode to RTD measurement ST START the Calibrator in switch test mode and or starts a new switch Shows the last values for the isolated and primary measurements in VAL that order ZERO MEAS Zeros the pressure module TC mV or RTD ohms ZERO MEAS Shows the zero offset for the pressure module TC mV or RTD 7 ohms Table 6 5 RS 232 Operation Mode Co
40. TYPE parameter was received 1130 45 An incorrect TC REF parameter was received 1140 45 An incorrect TSENS TYPE parameter was received No pressure module was present when a pressure function was requested or the total zero offset from calibration is more than 696 This error can also occur if the total zero offset from calibration is out of limits when zeroing the thermocouple millivolts type maximum offset 1 mV or the RTD ohms type maximum 0 1 ohm on high range or 0 01 ohm on the low range Remote Commands 6 Remote Command List Table 6 7 Error Code List cont message ciass Denton fat XE Teoma vafer ovetowes mo pee peanae The serial output buffer overflowed The output overloaded See display error message OVER LOAD in Chapter 1 The Calibrator is out of tolerance This error is set after a failed initialization or a failed TST command The Calibrator ADC has failed This error is set after a failed initialization or a failed TST command Remote Command List An alphabetical list of all Calibrator remote commands and queries 1s shown below This list includes common commands and the device dependent commands Each command title includes a checkbox that shows the remote interface applicability IEEE 488 and or RS 232 and the command group Sequential or Overlapped See the Types of Commands section of Chapter 5 for a description of these terms CLS IEEE 488 RS 232 Sequential
41. Temperature coefficient for temperatures outside tcal 5 C is 10 of the 90 day specification or 1 year if applicable per C lt 80 to 30 C lt 70 to 40 C lt 40 to 50 C 3 000 m 9 800 ft maximum 12 200 m 40 000 ft maximum EN IEC 61010 1 2010 3 Edition UL 61010 1 2012 CAN CSA 22 2 No 61010 1 12 20V 100 V to 120 V 220 V to 240 V 47 to 63 Hz 10 96 about setting 15 VA maximum 14 6 cm 5 75 inch 44 5 cm 17 5 inch 29 8 cm 11 75 inch overall 4 24 kg 9 35 Ib Introduction Specifications DC Voltage Specifications Output Absolute Uncertainty tcal 5 C Stabilit ppm of output yV y Maximum Ranges Resolution 2 90 Days 1 Year 24 hours 1 C Burden d ppm of output uV omeo 25 3 39 3 5smmezuw iav om overo 25 39 3 38 a pp to Sota 010100000 25 100 30 100 4pomsio v 30V 10mA Fovte 100 000 25 imv 30 imv Sppmeimv imv im TC Output and Input 1 A All outputs are positive only unless otherwise noted 2 Remote sensing is not provided Output resistance is 1 Q Ni ppm of output yV 10 kHz rms pV DC Voltage Specifications Isolated Input Absolute Uncertainty tcal 5 C OV to 100000 V 100 nV 0 Vio 100 000 V DC Current Specifications Output Absolute Uncertainty tcal 5 C Maximum Maximum ppm of output pA Resolution Compliance Inductive Voltage Load 90 Days mA to 100 000 mA 100 mH
42. Transmitter cece oneness enn tnt e diamantes matita det 4 12 Precision Temperature Measurement with Probe 4 13 Temperature Switeh 1251 92 2 22 ctsesecieeeatacasenedecteeemancnsteenaedetseaseastneancaeeseeteesteees 4 14 Piessurce yy E n 4 16 4 1 7526A Users Manual 4 2 Introduction Application Notes 4 Introduction This chapter includes application notes that will help you to understand how to better use the Product under different situations P I Transmitter l Disconnect test leads from external devices 2 Select pressure input on the primary display as given in the Pressure Measure section of Chapter 4 3 Select current input on the isolated display as given in the Current Input section of Chapter 5 Select 1solated loop power If a HART communicator 15 used for set up of the transmitter select HART 4 Connect the transmitter as shown in Figure 4 1 To verify and calibrate the transmitter refer to the transmitter documentation 7526A PRECISION PROCESS CALIBRATOR mA RTD O 100mA MAX OUTPUT 4W RTD O INPUT Pressure Module Hand Pump or Precision Regulated Supply Pressure VOLTS LOOP ewe er Au INPUT to 100 V PK MAX ue Documenting Process Calibrator Vent to Atmosphere gwp020 eps Figure 4 1 P I Transmitter Application 4 3 7526A Users Manual I P Transmitter Disconnect test leads from external devices
43. alibrate the transmitter refer to the transmitter documentation 7526A PRECISION PROCESS CALIBRATOR mA 100mA MAX VOLTS LOOP ars me we TC INPUT OUTPUT b INPUT A n LO 100 V PK MAX gwp029 eps Figure 4 10 I I Isolator Transmitter Application Application Notes 4 Thermocouple Transmitter Precision Temperature Measurement with Probe 1 With the probe and the custom coefficients that go with the probe the total system error is 0 03 C 2 Disconnect test leads from external devices 3 Select RTD input on the primary given as given in the Resistance Temperature Detector RTD and Ohms Measure section of Chapter 4 4 Select the user defined curve with the custom coefficients for the probe If custom coefficients have not been recorded for the probe follow the instructions in the Resistance Temperature Detector RTD with Custom Coefficients section in Chapter 4 5 Connect the probe as shown in Figure 4 11 7526A PRECISION PROCESS CALIBRATOR alibration OUTPUT INPUT ZERO CID Ed EJ mA DISPLAY GIC C F RTD SET RECALL AUTOSET CJCJOCO ES RNGLOCK LOCAL EXP SHIFT ENTER gwp030 eps Figure 4 11 Precision Temperature Measurement with Probe 7526A Users Manual Temperature Switch Test To do a temperature switch test see Figure 4 12 for the necessary connections and do the subsequent steps 7526A PRECISION
44. always 0 C Internal cold junction compensation The Product automatically measures the ambient temperature at the thermocouple terminals and adjusts the measurement for example 0 mV is ambient temperature o Input or output value Figure 1 7 Primary Thermocouple and RTD Display 7526A Users Manual Figure 1 8 shows the primary and isolated pressure display 57 gwp008 eps p mem scription oo On the primary display rem is shown to the left during remote operation Input value Figure 1 8 Primary and Isolated Pressure Display Figure 1 9 shows the isolated voltage and current display L o o gwp009 eps powm o Description O Selected range and input mode 10V RANGE or 100V RANGE for dc voltage 50mA RANGE for basic dc current 24mA LPWR for loop powered two wire transmitter 24mA LPWR HART for loop powered two wire transmitter with 250 resistor in circuit Input value Figure 1 9 Isolated Voltage and Current Display Introduction 1 Set Up Error Messages Table 1 2 shows the error messages that can appear on the displays Table 1 2 Error Messages OVER RANGE ee keypad value is larger than the range of the output mode For dc voltage output mode the current necessary to make the output is OVER LOAD larger than the Product specifications For dc current mode the resistance of the circuit is larger than the Product specifications For input modes the measured value is larger than the top
45. arameter None Response value where value 1s one of these PSI INH204C INH2020C INH2060F CMH204C CMH2020C MMH204C MMH2020C BAR MBAR KPA MPA INHG MMHG KG CM2 PRES UNIT BAR Example pounds per square inch inches of water at 4 C inches of water at 20 C inches of water at 60 F centimeters of water at 4 C centimeters of water at 20 C millimeters of water at 4 C millimeters of water at 20 C bars millibars kilopascals megapascals inches of mercury at 0 C millimeters of mercury at 0 C kilograms per square centimeter This example shows that the primary pressure display units are bars Remote Commands 6 Remote Command List RANGE IEEE 488 RS 232 Sequential Overlapped This command shows the current DC voltage or current output range Parameter lt None gt Response lt value gt where lt value gt is one of these V_0 1V DC volts 100 mV range V IV DC volts 1 V range V 10V DC volts 10 V range V 100V DC volts 100 V range A 0 10 DC current NONE neither volts nor current is selected Example RANGE V 10V This example 15 an indication that the current output range 15 10 V RANGELCK IEEE 488 R5 232 Sequential Overapped This command locks or unlocks the DC voltage output range in reference to the current output value Parameter value where value is one of these ON to lock the current voltage range OFF to unlock the current voltage range Respons
46. ard RS 232 connection with a PC The RS 232 cable for the port must be shorter than 15 meters 50 feet Longer cables are permitted 1 the load capacitance measured at a connection point including signal terminator 15 not larger than 2500 pF The serial communications parameters in the Product are set at these values e 9600 baud e 8 data bits e 15000 bit e no parity e Xon Xoff e EOL end of line character CR Carriage Return A typical RS 232 connection is shown in Figure 5 1 Note that a null modem cable 15 used for the connection See the Rear Panel section in Chapter 1 for the location of the RS 232 port on the rear panel of the Product Null Modem Cable COM Port SERIAL Port 7526A Calibrator Controller gwp031 eps Figure 5 1 RS 232 Remote Connection 5 4 LCD and Remote Interface Setup Procedures 5 Remote Interface Use with Computer USB Ports The Product can be used with a computer USB ports with a USB to serial converter Fluke can supply the equipment for this connection e 80313 Cable USB to serial adapter e 80157 Cable Null modem RS 232 See Figure 5 2 for connections IEEE Port IEEE 488 Cable IEEE 48 Port 7526A Calibrator Controller gwp032 eps Figure 5 2 RS 232 Remote Connection Set Up the IEEE 488 Port for Remote Control The Product is fully programmable for you to use on a standard IEEE 488 interface bus The IEEE 488 interface is also in compliance with supple
47. as given in the Resistance Temperature Detector RTD and Ohms Measure section of Chapter 4 Select the correct RTD type 4 Connect the RTD as shown in Figure 4 4 To verify the RTD refer to the RTD documentation 7526A PRECISION PROCESS CALIBRATOR ion Temperature Chamber RTD NO f gwp023 eps Figure 4 4 RTD Test Application Application Notes 4 RTD Transmitter RTD Transmitter 1 Disconnect test leads from external devices 2 Select RTD output on the primary display as given in the Resistance Temperature Detector RTD and Ohms Source section of Chapter 4 Select the correct RTD type 4 Select current input on the isolated display as given in the Current Input section in Chapter 5 5 Select the isolated loop power option If a HART communicator will be used for setup of the transmitter select HART Connect the transmitter as shown in Figure 4 5 To verify and calibrate the transmitter refer to the transmitter documentation 7526A PRECISION PROCESS CALIBRATOR RTD O OUTPUT VOLTS LOOP 3 5 EA Harr 2 b D Documenting Process Calibrator gwp024 eps Figure 4 5 RTD Transmitter Application 4 7 7526A Users Manual Thermocouple Test 1 Disconnect test leads from external devices 2 Select thermocouple input on the primary display as given in the Thermocouple TC Measure section in Chapter 4 Select the correct thermocouple type 4 Connect
48. by and Operate modes In Standby mode changes to the output value in the display is not applied to the terminals pun until you select the Operate mode In Operate mode each change to the output value in the display is applied to the terminals immediately Voltages more than 30 V are not applied to the terminals and the mode automatically reverts to Standby for your safety Changes the Product output or parameter to the numeric value typed into the keypad CE Erases a partial keypad entry and reverts the Product output or parameter to its last known value Prepares for selection of a secondary function with the numeric keypad The secondary function is shown above each numeric key The display changes to SHIFT ENABLED until a numeric key is pushed To cancel the selection push again Push 9 or D to put the cursor below the digit in an output value that is to be increased or decreased Push amp to increment the digit in the output value where the cursor is Cursor Controls Push to decrement the digit in the output value where the cursor is The amp and amp keys are also used to adjust LCD Contrast level LCD Backlight level and Remote Interface Configuration selections as given in Chapter 5 LCD and Remote Interface Setup Procedure Figure 1 3 Primary Input Output Display and Controls cont 1 7526A Users Manual Isolated Input Display Controls and Terminals Figure 1 4 shows the isolated inp
49. e lt None gt Example RANGELCK ON If the current DC voltage output is 5 V this example locks the range at 10 VDC 6 21 7526A Users Manual 6 22 X IEEE 488 x R5 232 x Sequential L_ Overlapped RANGELCK This command shows the DC voltage range lock status Parameter lt None gt Response lt value gt where lt value gt is one of these ON DC voltage range lock is on OFF DC voltage range lock is off Example RANGELCK OFF This example is an indication that the range lock is off REMOTE IEEE 488 RS 232 X Sequential _ Overlapped This command puts the Calibrator into the remote condition It duplicates the IEEE 488 REN Remote Enable message When the Calibrator is in the remote condition but not locked out only the LOCAL key is active If the front panel is also locked out no front panel keys are active See the LOCKOUT command To unlock the front panel use the LOCAL command or push the Calibrator power switch Parameter lt None gt Response lt None gt Example REMOTE This example places the Calibrator into the remote condition Remote Commands 6 Remote Command List RST IEEE 488 X RS 232 Sequential X Overlapped This command resets the Calibrator to the power up condition and holds off execution of subsequent commands until the reset operation is complete A reset action invokes the subsequent commands and values for the primary display Command Value OUT OV PRES UN
50. e BP l Disconnect test leads from external devices 2 Push to select thermocouple and RTD Q mode if not already selected If RTD Q mode 15 shown push the key again to go to thermocouple mode 3 Ifinput mode is shown push and to select output mode 4 Push to select the necessary thermocouple type or the millivolt range Connect the UUT to the thermocouple terminals of the Product with a standard TC miniplug as shown in Figure 2 6 One pin is wider than the other Do not push the plug into the incorrect polarization The TC wire used for the connection must agree with the thermocouple type selected for correct cold junction compensation It 1s necessary for the miniplug and terminals to become stabile to the same temperature They are stable in approximately 3 minutes Unit Under Test UUT Thermocouple Input gwp015 eps Figure 2 6 Thermocouple Output Connection 7526A Users Manual 6 Push and e to toggle the thermocouple display between F and C 7 Push and 5 to toggle the cold junction compensation between the internal temperature sensor and an external reference 8 Use the numeric keypad to type the necessary output value and push e 9 Asan alternative use or D to select a digit to change followed by amp or 9 to ramp the digit up or down This method gives you a simple solution when small changes to an output value are necessary or if is necessary to increment or decrement decades 10 For bes
51. e Register Read using SRE Write using SRE gwp033 eps Figure 5 3 IEEE 488 GPIB Remote Connection Change Between Local and Remote Operation With local mode front panel operation and remote the Product can be put into a local lockout condition by command of the controller Mixed the local remote and lockout conditions will give you four possible operation conditions as follows 1 Local State The Product answers to local and remote commands This is usual front panel operation All remote commands received by the Product are processed 2 Local with Lockout State Local with lockout is the same to local but the Product will go into the remote with lockout state as an alternative to the remote state when it receives a remote command You can only go to this state with the IEEE 488 command GTL Go To Local when in the remote with lockout state 3 Remote State When the Product is put in remote by RS 232 REMOTE command or by IEEE 488 asserting the REN line it goes to the remote state The left end of the top line of the display changes to rem Front panel operation is stopped This does not include the LOCAL 0 key Push the LOCAL key use RS 232 to send the LOCAL command or use IEEE 488 to send the GTL Go To Local message The Product goes to the local state 4 Remote with Lockout State When the Product is in lockout by RS 232 LOCKOUT command or by IEEE 488 message LLO Local Lockout the Product front
52. e first errors are kept because 1f many errors occur before the user can acknowledge and read them the first errors are most likely to point to the problem The newest errors are usually repetitions or consequences of the initial problem Input Buffer Operation As the Product gets each data byte from the controller it puts the byte in a part of memory named the input buffer The input buffer holds a maximum of 250 data bytes and operates in a first in first out procedure IEEE 488 interface The Product works with the IEEE 488 EOI control line as an isolated data byte and puts it into the input buffer if it is found as part of a message terminator Input buffer operation is transparent to the program on the controller If the controller sends commands faster than the Product can do them the input buffer fills to capacity When the input buffer is full the Product holds off the IEEE 488 bus with the NRFD Not Ready For Data handshake line When the Product has processed a data byte from the full input buffer 1t then completes the handshake This lets the controller send a different data byte The calibrator clears the input buffer on power up and when receiving the DCL Device Clear or SDC Selected Device Clear message from the controller RS 232 interface The Product uses the RS 232 C Xon Xoff protocol to control buffer overflow The Product sends a Xoff Ctrl S character when the input buffer becomes 80 full and sends a Xon
53. e the Primary Input Output Display and Controls section of this chapter 3 Isolated input display controls and terminals See the Isolated Input Display Controls and Terminals section of this chapter Figure 1 1 Front Panel 1 7526A Users Manual Primary Input Output Terminals Figure 1 2 shows the primary input output terminals 7526A PRECISION ES CALIBRATOR t alibration RTD O OI gwp002 eps pom o Desin OO VOLTS 4 pc voltage output terminals mA DC current output terminals EN TC INPUT OUTPUT Thermocouple input and output terminals These terminals accept a 4 miniature polarized thermocouple plug with flat in line blades distanced 7 9 mm 0 312 in center to center 6 4W RTD Q INPUT l Four wire RTD and ohms input terminals 0 Pressure module input connector 1 These terminal binding posts are made of a special copper alloy to decrease thermal EMFs Discreet wires or standard banana plugs can be used The HI LO pairs are distanced for standard dual banana plugs 2 AA Warning To prevent possible electrical shock fire or personal injury do not exceed a maximum of 100 V peak to chassis ground AA Warning To prevent possible electrical shock fire or personal injury do not exceed a maximum of 20 V peak to chassis ground Figure 1 2 Primary Input Output Terminals Introduction 1 Product Description Primary Input Output Display and Controls Figure 1 3 s
54. eared set to 0 each time it is read To read the contents of the ESE send the remote command ESE The ESE is not cleared when it is read When you read registers the Product shows a decimal number that when changed to binary refers to bits 0 through 15 9 Output Queue The output queue 15 loaded when a query is processed and holds a maximum of 250 5 15 7526A Users Manual 5 16 10 11 characters The controller reads it with a statement such as a BASIC INPUT statement What is read is removed from the queue If the queue is empty the Product does not answer to the INPUT statement from the controller The Message Available MA V bit in the Serial Poll Status Byte is 1 if there is something in the output queue and 0 if the output queue is empty Error Queue When a command error execution error or device dependent error occurs its error code is put in the error queue where it can be read by the FAULT command If you read the first error with the FAULT Command this removes that error from the queue A response of 0 means the error queue is empty The error queue is cleared when you turn off the power and when you use the CLS Clear Status common command The error queue holds A maximum of 15 entries If more than 15 errors occur only the first 15 errors are kept in the queue A 16th entry in the queue is always an error queue overflow error and all new errors are discarded until part of the queue 15 read Th
55. ected and sets its range accordingly 3 Ifnecessary push again to cycle through the pressure units until the necessary unit is shown 4 Before you attach the module to the pressure source zero the module as given in the instruction sheet that came with the module Procedures can be different but all end with and 9 5 Attach the module to the pressure source Refer to the instruction sheet that came with the module and make sure to follow all safety precautions when dealing with high pressures 3 4 Isolated Inputs 3 Switch Test Switch Test When in Switch Test mode the Calibrator can sense a contact transition closed or opened At the time of the transition the Calibrator records the value and units shown on the primary display This means that a switch test can be done in all modes read or source After two transitions the Calibrator changes to recall mode In recall mode the value of the first transition second transition and the calculated deadband of the switch can be seen on the display See Figure 3 4 for connections vous tooP bee 5m eet L9 9 p gwp070 eps Figure 3 4 Swich Test and Pressure Module Connections 1 To go to switch test mode push and hold for three seconds When in switch test mode the Calibrator shows the status of the switch contacts in this instance you can see the contact status of a normally open temperature switch At the first transition the s
56. ement Parameter lt None gt Response lt value gt where lt value gt is one of these INT internal temperature sensor in use EXT external reference value in use Example TC REF INT This example is an indication that the internal sensor is in use 6 29 7526A Users Manual 6 30 TC TYPE IEEE 488 X RS 232 _ Sequential Overlapped This command sets the Thermocouple TC sensor type that is used for TC temperature source and measurement Typically before you use the TC TYPE command to select the TC type use the TSENS TYPE command to select TC mode and afterwards set the output temperature with the OUT command if applicable A change in temperature sensors sets the output to 0 C Parameters value where value 1s one of these B B type thermocouple C C type thermocouple E E type thermocouple J J type thermocouple K K type thermocouple L L type thermocouple N N type thermocouple R R type thermocouple S S type thermocouple T T type thermocouple U U type thermocouple XK XK type thermocouple BP BP type thermocouple Z mV C Response None Example TC TYPE J This example sets the thermocouple type to J type Remote Commands 6 Remote Command List TC_TYPE Dy IEEE 488 X RS 232 X Sequential C Overlapped This command shows the Thermocouple TC sensor type that is used for TC temperature source and measurement Parameter Response lt None gt lt value gt where lt value gt is o
57. er SRE enables or masks the bits of the Serial Poll Status Byte The SRE 15 cleared at power up Refer to Table 5 8 for the bit functions 4 Programming the STB and SRE When you reset to 0 the bits in the SRE you can mask disable related bits 1n the serial poll status byte Bits set to 1 enable the related bit in the serial poll status byte LCD and Remote Interface Setup Procedures 5 Command Use 5 Event Status Register ESR The Event Status Register is a two byte register in which the higher eight bits are always 0 and the lower eight bits show different conditions of the Product The ESR is cleared set to 0 when the power is turned on and each time it is read Parameters are necessary for many of the remote commands Incorrect parameter use causes command errors to occur When a command error occurs bit CME 5 in the Event Status Register ESR goes to 1 if enabled in ESE register and the error is logged in the error queue 6 Event Status Enable ESE Register A mask register named the Event Status Enable register ESE lets the controller enable or mask disable each bit in the ESR When a bit in the ESE is 1 the related bit in the ESR 1s enabled When an enabled bit in the ESR is 1 the ESB bit in the Serial Poll Status Byte also goes to 1 The ESR bit stays 1 until the controller reads the ESR does a device clear a selected device clear or sends the reset or CLS command to the Product The ESE is cleared se
58. erdadencbeetuntaeetaualoanecuwans 2 1 7526A Users Manual 2 2 Primary Inputs and Outputs 2 Introduction Introduction This chapter explains the main primary inputs and outputs of the Product Connection figures are also shown so that you properly connect the Product to a unit under test UUT DC Voltage Output The Product can source dc voltages from 0 V to 100 V and uses these four ranges for maximum accuracy e 0 1 V e IV e 10V e 100 V For dc voltage output 1 Disconnect test leads from external devices 2 Push to select dc voltage and current mode if not already selected 3 Ifdc current mode is shown push the key again to go to dc voltage mode 4 Connect the UUT to the voltage output terminals of the Product as shown in Figure 2 1 Unit Under Test UUT 4 EL 7526A PRECISION PROCESS CALIBRATOR Calibration LIE OUTPUT VOLTS mA 100mA MAX DC Voltage Input OUTPUT 100V MAX M4 A SENSE O HI J CURRENT MO s z gwp010 eps Figure 2 1 DC Voltage Output Connections 5 Use the numeric keypad to type the necessary output value and push even 6 Asan alternative use or D to select a digit to change followed by amp or amp to ramp the digit up or down This method gives you a simple solution when small changes to an output value are necessary or if is necessary to increment or decrement decades 7 When dc voltage mode is fi
59. erial interface GPIB IEEE 488 2 connector for remote control of the Product with a GPIB bus Service port to update the Product firmware Chassis ground terminal internally connected to the ground prong of the AC power inlet Standard IEC AC power inlet for 120 240 V ac Main power on off switch Power line voltage selector and fuse compartment See Chapter 7 Maintenance for instructions to change the line voltage selector and fuses Figure 1 5 Rear Panel 7526A Users Manual Display Layouts Figure 1 6 shows the primary voltage and current display gwp006 eps S eseription Operation mode AUTO Auto range LOCK Range lock rem Remote operation SP Automatic stepping of preset setpoints Current range and output mode Output condition Stby Standby terminals inactive Operating terminals are active with output that refers to the shown value 4 Output value s Figure 1 6 Primary Voltage and Current Display Introduction 1 Product Description Figure 1 7 shows the primary thermocouple and RTD display Onr dT eO gwp007 eps powm o Description O Output condition for RTD outputs Stby Standby terminals inactive Opr Operating terminals are active with output per the shown value Blank for RTD inputs Cold junction selection for thermocouple inputs and outputs 4 XCJC External cold junction compensation The Product automatic cold junction compensation is turned off for example 0 mV is
60. eviation coefficients 10 To abort the SPRT entry without stored changes push Il To use a custom SPRT l A 3 oe lS Select RTD measure mode as given in the Resistance Temperature Detector RTD and Ohms Measure section of this chapter Push until the SPRT type is selected Push to show the prompt SET 1 RECALL 2 Push 2 to recall the custom SPRT curve coefficients To use a different custom SPRT push two times to show the SPRT selection prompt Thermocouple TC Measure The Product can measure all common thermocouple types in F or C plus basic millivolts from 10 0 to 75 0 mV The Product uses these common thermocouple types B GCHinrA 2zvrvraAnA TT HO BP Disconnect test leads from external devices Push to select thermocouple and RTD Q mode if not already selected If RTD Q mode 15 shown push the key again to go to thermocouple mode If output mode is shown push and to select input 2 9 7526A Users Manual 2 10 Push to select the necessary thermocouple type or the millivolt range Connect the UUT to the thermocouple terminals of the Product with a standard TC miniplug as shown in Figure 2 5 One pin is wider than the other Do not push the plug into the incorrect polarization The TC wire used for the connection must agree with the thermocouple type selected for correct cold junction compensation It is necessary for the miniplug and terminals to stabilize to the same
61. he deadband of the switch To calculate this subtract the second recorded contact transition from the first recorded contact transition and where lt units gt are the units recorded from the primary display at the time the test was done ST DEAD 5 30000E 00 CEL This example shows the value of the calculated deadband temperature of the switch in Celsius Remote Commands 6 Remote Command List TC_MEAS IEEE 488 R amp S 232 Sequential Overlapped This command places the primary display in thermocouple measure mode Parameter value where value is one of these CEL display in degrees Celsius FAR display in degrees Fahrenheit lt None gt display in the last selected temperature unit Response lt None gt Example TC MEAS FAR This example puts the Calibrator into thermocouple measure mode and shows in degrees Fahrenheit TC REF IEEE 488 R5 232 L Sequential Overlapped This command selects the internal temperature sensor or an external reference value for cold junction compensation of thermocouple source and measurement Parameter value where value is one of these INT use internal temperature sensor EXT use external reference value Response None Example TC REF EXT This example sets the thermocouple reference to external TC REF IEEE 488 RS 232 Sequential Overlapped This command shows the source of the temperature that is used for cold junction compensation of thermocouple source and measur
62. hows the primary input output display and controls OUTPUT INPUT ZERO VOLT o a Eg DISPLAY CJC CIE STBY OPR SET RECALL AUTOSET Coc RNGLOCK LOCAL EXP E565 5 E gwp003 eps Display A two line 16 character display that gives all visual user feedback for the A primary output and input operations See the Display Layout and Error Messages section of this chapter for more information Numeric and Secondary Function Keys Output value data entry keys Secondary function selection per the text printed above the numeric key Push and then the numeric key to select the function Change RTD Ohms or Thermocouple to output mode Change RTD Ohms or Thermocouple to input mode Zero the input for Pressure Thermocouple millivolts or RTD ohms Adjust the LCD Contrast LCD Backlight and Remote Interface Configuration as given in Chapter 5 LCD and Remote Interface Setup Procedures Select internal or external cold junction compensation for Thermocouple temperature measurements When external 5 compensation is selected XCJC is shown at the start of the second line Figure 1 3 Primary Input Output Display and Controls 7526A Users Manual O Numeric and Secondary Function Keys Output value data entry keys Secondary function selection per the text printed above the numeric key Push and then the numeric
63. ice Fluke reserves the right to invoice Buyer for importation costs of repair replacement parts when product purchased in one country is submitted for repair in another country Fluke s warranty obligation is limited at Fluke s option to refund of the purchase price free of charge repair or replacement of a defective product which is returned to a Fluke authorized service center within the warranty period To obtain warranty service contact your nearest Fluke authorized service center to obtain return authorization information then send the product to that service center with a description of the difficulty postage and insurance prepaid FOB Destination Fluke assumes no risk for damage in transit Following warranty repair the product will be returned to Buyer transportation prepaid FOB Destination If Fluke determines that failure was caused by neglect misuse contamination alteration accident or abnormal condition of operation or handling including overvoltage failures caused by use outside the product s specified rating or normal wear and tear of mechanical components Fluke will provide an estimate of repair costs and obtain authorization before commencing the work Following repair the product will be returned to the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges FOB Shipping Point THIS WARRANTY IS BUYER S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARR
64. ion 4 Ifthe UUT is a 2 wire loop powered transmitter that is disconnected from the wiring 3 3 7526A Users Manual push to turn on the Product internal 24 V supply in series with the current measuring circuit The top line changes to 24mA LPWR to show that the supply is on Push again to turn off the supply and the top line reverts to 50mA RANGE 5 Ifa 250 Q resistor is necessary during a HART calibration procedure push to switch in the Product internal 250 Q resistor HART is added to the top line of the display to show that the resistor 15 turned on in the circuit Push again to turn off the resistor and the display changes to its previous condition This resistor lowers the maximum load driving function from 1000 Q at 20 mA to 750 Q at 20 mA Pressure Input The isolated pressure display uses the same physical pressure connector as the primary display It is possible to have the displays set to show pressure at the same time The same source can be shown in different pressure units See the Pressure Measure in Chapter 2 for a discussion on pressure module selection 1 Connect the pressure module to the Product as shown in Figure 3 3 I 7526A PRECISION PROCESS CALIBRATOR Calibration Pressure Mod u le 1 AX OUTPUT 100V MAX TC b INPUT AO 100 V PK MAX gwp019 eps Figure 3 3 Isolated Pressure Module Connection 2 Push 2 The Product automatically senses which pressure module is conn
65. limit of the selected input mode range For output modes when the range is locked the current automatically recalled preset setpoint is larger than the maximum limit of the locked range The output is set to zero for the time of this setpoint OL For input modes the measured value is less than the lower limit of the selected input mode range Set Up Follow the subsequent steps to set up the Product AA Caution Before you connect the mains power cord to the rear connector make sure that the line voltage selector is in the correct position for your location The Product is shipped from the factory with the line voltage set for the country of purchase To make sure the line voltage is correctly set examine the indicator on the power line voltage selector and fuse compartment cover See the Rear Panel section of this chapter l See Table 1 3 to set the correct line voltage Table 1 3 Line Voltage Settings Line Voltage 50 60Hz Selector Position 100 V ac to 120 V ac 120 V ac position 220Vacto240Vac V ac to 240 V ac 240 V ac position 2 Ifthe line voltage is not correctly set follow the instructions in Changing the Line Voltage in Chapter 7 7526A Users Manual 3 When the line voltage is correctly set make sure that the power switch is off and connect the mains power cord to the Product See the Rear Panel section of this chapter for the location 4 Turnon the Product with the rear
66. mand causes program execution to pause until all operations are complete See also the WAI command Shows a list of the installed hardware and software options Resets the condition of the instrument to the power up condition This command holds off execution of subsequent commands until it is complete Puts a byte into the Service Request Enable register SRE Shows the byte from the Service Request Enable register Shows the status byte Does a series of self tests and shows a 0 for pass or a 1 for fail If faults are found they are put into the fault queue where they can be read by the FAULT query WAI Stops subsequent remote commands from execution until all remote commands from before are complete 6 7526A Users Manual Table 6 2 External Connection Commands Shows the current output measurement or calibration function selected on FUNC the isolated and primary displays in that sequence HART Shows the HART resistor setting for the isolated milliamp range ON or OFF HART_OFF Turns off the HART resistor on the isolated milliamp range HART_ON Turns on the HART resistor on the isolated milliamp range ISO PRES UNIT Sets the isolated display pressure units ISO PRES UNIT Shows the isolated display pressure units Shows the 24V loop power setting for the isolated milliamp range ON or OFF Sets the Resistance Temperature Detector RTD type Shows the Resistance Temperature Detector RTD type
67. mental standard IEEE 488 2 which gives you more IEEE 488 features Devices connected to the IEEE 488 bus are designated as talkers listeners talker listeners or controllers The Product operates as a talker listener when you use it by remote control from an instrument A PC with an IEEE 488 interface controls the Product Compatible software for IEEE 488 operation MET CAL can be purchased from Fluke Calibration When you use the IEEE 488 remote control interface there are two restrictions 1 A maximum of 15 devices can be connected in one IEEE 488 bus system 2 The total length of IEEE 488 cables used in one IEEE 488 bus system is the smaller of 2 meters multiplied by the number of devices in the system or 20 meters 65 feet See Chapter 5 for instructions to configure the Product for IEEE 488 GPIB operation These instructions include interface and bus address selection A typical IEEE 488 GPIB connection is shown in Figure 5 3 See the Rear Panel section of Chapter 1 for the location of the IEE 488 GPIB port on the rear panel of the Product 5 5 7526A Users Manual o XS Qao d4G d Event Status 76543210 Register 5 Pom Read using ESR Output Buffer Event Status EnableRegister Lm Read using ESE Write using ESE Error Queue Read using ERR Read by Serial Poll Status Byte Register 4 Read using STB I I I t SRQ on IEEE bus Service Request 71 lt 151413 2 1 0 Enabl
68. mmands LOCAL Puts the Calibrator into the local condition and disables lockout LOCKOUT Puts the Calibrator into the lockout condition This command duplicates the IEEE 488 LLO Local Lockout message REMOTE Puts the Calibrator into the remote condition This command duplicates the IEEE 488 REN Remote Enable message Table 6 6 Status Commands Command FAULT Shows the most recent error code in the Calibrator error queue and then l removes that error code from the queue 6 7526A Users Manual Error Code List Table 6 7 1s list of error codes for the Product Table 6 7 Error Code List EL Message Class or STBY was received when the Calibrator is in measure mode or thermocouple source mode 101 CME A non numeric eniry was received in a field that must contain a numeric entry The numeric field is more than 10 characters An attempt to go into RTD source mode was made when 104 EXE SPRT is selected or to select SPRT when RTD source mode is selected Entry is above top limit for the selected output range Entry is below lower limit for the selected output range An incorrect TC MEAS or RTD MEAS unit parameter 109 CME not CEL or FAR was received or an incorrect PRES UNIT or ISO PRES UNIT parameter was received RESI Ss pret RE E An incorrect RANGELCK parameter was received RANGELCK ON was received when the Calibrator is not in Volts mode EE An incorrect RTD
69. mmands 6 Remote Command List x IEEE488 2 2 Sequential Overlapped This command shows the unit identification instrument manufacturer model number serial number and firmware revision level Parameter Response Example ISO MEAS None text string where text string contains the subsequent four fields separated by commas 1 Manufacturer 2 Model number 3 Serial number always 0 4 Firmware revision level IDN FLUKE Calibrator 0 1 2 This example is an indication the manufacturer is Fluke the model 15 Calibrator the serial number 15 0 and the firmware version 15 1 2 IEEE 488 x RS 232 Sequential X Overlapped This command sets the isolated measurement type Parameter Response Example value where value 1s one of these DC10V measure DC voltage 10V range DC100V measure DC voltage 100V range DCI measure DC current PRESSURE measure pressure lt None gt ISO MEAS DCI This example sets the isolated measurement to DC current 7526A Users Manual ISO PRES UNIT IEEE 488 RS 232 _ Sequential Overlapped This command sets the isolated pressure unit Parameter lt value gt where lt value gt is one of these PSI pounds per square inch INH204C inches of water at 4 C INH2020C inches of water at 20 C INH2060F inches of water at 60 F CMH204C centimeters of water at 4 C CMH2020C centimeters of water at 20 C MMH204C millimeters of water at
70. n Push or to cycle through the possible addresses 0 to 30 When the necessary address is shown push res Remote Interface The Product can be controlled remotely from a personal computer PC Use an RS 232 serial connection or an IEEE 488 parallel connection also called a General Purpose Interface Bus or GPIB connection Individual commands can be typed into terminal emulator software applicable for the connection type The Calibrator can also be controlled by PC software that uses the Product command set You can write your own PC program or purchase applicable third party software and configure it for the Product MET CAL a compatible software for IEEE 488 operation can be purchased from Fluke oY x 1m X xs The RS 232 connection lets one Product be connected to one PC The communication speed 15 slower than IEEE 488 but no other equipment is necessary other than a low cost null modem cable The IEEE 488 connection lets you connect a maximum of 15 different calibrators PCs and items of test equipment together in a bus system The communication speed is much faster than RS 232 but it is necessary to purchase and install special PC interface card s and cable s This section gives the setup of the two types of connections and the general operation of the command set Chapter 6 gives the individual commands 5 3 7526A Users Manual Set Up the RS 232 Port for Remote Control The Product is programmable with a stand
71. n command parameters and used in responses All commands and units can be recorded in upper or lower case 5 10 LCD and Remote Interface Setup Procedures 5 Command Use Table 5 4 Units Accepted in Parameters and Used in Responses 1 Volts in units of microvolts mv Volts in units of millivots OOO V kV A mA A Ohm kOhm MOhm cel far psi mmHg inHg inH2O4C inH2020C inH2O60F cmH204C cmH2020C mmH204C mmH2020C bar kg cm2 Volts in units of millivolts Volts in units of volts Volts in units of kilovolts Current in units of microamperes M Current in units of milliamps M Current in units of amps Resistance in units of ohms Resistance in units of kilohms Resistance in units of megohms Temperature in degrees Celsius Temperature in degrees Fahrenheit Pressure in pounds per square inch Pressure in millimeters of mercury at 0 C Pressure in inches of mercury at 0 C Pressure in inches of water at 4 C 1 Parameter only 2 General Rules The general rules for parameter use are e Numeric parameters can have a maximum of 15 important digits and their value can be in the range 1 0E 20 e You must include the correct number of parameters This causes a command error e Null parameters cause an error for example the adjacent commas in OUT 1V OPER e Expressions for example 4 2 13 cannot be used as parameters 7526A Users Manual 5 12 3 More Space or Tab
72. nde I ta ene 7526A Users Manual Resistance Temperature Detector RTD and Ohms Measure Resistance Temperature Detector RTD and Ohms Source Resistance Temperature Detector RTD with Custom Coefficients Standard Platinum Resistance Thermometer SPRT Coefficients Thermocouple IC Meas tie soit PEE oped UE T EIE E DEAE EAN AEN dU Thermocouple TC PCS SUB VCS UM Casas soiovit oix eser E Mex Eis dau DUC Ma a Diccta DEM SR UI P DIM EPUM 3 eril fte 7 0 c H PEESSUTEIMDHE OMA Pee De DUE iler T Output 4 Application Notes iiie ian msE uU EUREN EKUsxU Rei ssn ements stas ELE E E O IMP NPE ANS STAM GB octet eect seers bert E mime tutem utu mr NE NT Re E A AI EE ERA RADI O T Thermocouple RR Precision Corrent 1 1 Isolatot Lransmittet nnnnnnnnnnnennnnseessesesessessssssssssssssssssssssssssssssssssssnnns Precision Temperature Measurement with Probe
73. ne gt Example LOCAL This example puts the instrument into the local condition clearing the remote condition and front panel lockout condition if enabled 6 13 7526A Users Manual LOCKOUT IEEE 488 RS 232 x Sequential Overlapped This command puts the Calibrator into the lockout condition when in remote control see the REMOTE command In this condition no local operation 15 permitted at the front panel This includes the LOCAL key To clear the lockout condition use the LOCAL command This command duplicates the IEEE 488 LLO Local Lockout message Parameter None Response None Example LOCKOUT This example puts the instrument into the lockout condition No front panel controls can be used LOOP POWER IEEE 488 RS 232 Sequential Overlapped This command shows the isolated DC current input 24V loop power status Parameter lt None gt Response lt value gt where lt value gt is ON or OFF Example LOOP POWER OFF This example is an indication that the isolated DC current input 24V loop power is turned off LOOP POWER OFF IEEE 488 RS 232 Sequential Overapped This command disables the isolated DC current input 24V loop power Parameter lt None gt Response lt None gt Example LOOP POWER OFF This example disables the isolated DC current input 24V loop power LOOP POWER ON IEEE 488 RS 232 Sequential Overlapped This command enables the isolated DC current input 24V loop powe
74. ne of these B B type thermocouple C C type thermocouple E E type thermocouple J J type thermocouple K K type thermocouple L L type thermocouple N N type thermocouple R R type thermocouple S S type thermocouple T T type thermocouple U U type thermocouple XK XK type thermocouple BP BP type thermocouple Z 1 mV C Example TC_TYPE K This example is an indication that the thermocouple sensor type is K type TSENS TYPE IEEE 488 R5 232 Sequential Overlapped This command puts the temperature mode to thermocouple TC or Resistance Temperature Detector RTD for temperature source and measurement Parameters value where value 1s one of these TC Thermocouple RTD Resistance Temperature Detector Response lt None gt Example TSENS TYPE RTD This example sets the temperature mode to RTD 6 31 7526A Users Manual 6 32 TSENS TYPE X IEEE 488 x R8 232 X Sequential L_ Overlapped This command shows the current temperature mode thermocouple TC or Resistance Temperature Detector RTD Parameter Response Example TST lt None gt lt value gt where lt value gt is one of these TC Thermocouple RTD Resistance Temperature Detector TSENS TYPE TC This example is an indication that the current temperature mode is thermocouple x IEEE488 2 2 X Sequential Overlapped This command does a series of self tests and shows a 0 for pass or a 1 for fail If faults are fo
75. oduct into remote operation mode but it is not because the IEEE Standards use the remote function to be sent to the device as the uniline message REN This is also true for some other commands and functions as shown in Table 5 2 with their RS 232 equivalents Table 5 2 RS 232 Emulation of IEEE 488 Messages IEEE 488 Message RS 232 Equivalent LOCAL command GTR REMOTE command 1 LOCKOUT command SDC DCL not emulated on RS 232 not emulated on RS 232 SPE SPD not emulated on RS 232 UNL UNT not emulated on RS 232 The IEEE 488 interface uses the IEEE Standards 488 1 and 488 2 as its basis For more information refer to the IEEE 488 1 and IEEE 488 2 standards 5 7 7526A Users Manual Command Use Communications between the controller and the Product use commands queries and interface messages Although the commands use the 488 2 standard as their basis they can be used on the IEEE 488 or RS 232 interface There are some special RS 232 only commands as shown in the section Commands for RS 232 Only For more information on IEEE command structures see the IEEE 488 2 standard See Chapter 6 for more information about the commands referenced in this section All commands units and text data can be recorded in UPPER or lower case letters The Product changes all lower case letters to upper case before they are used Types of Commands The commands for the Product can be put into these categories
76. oints of argon mercury and water This includes the 83 8058 K to 273 16 K subrange Coefficients A B and C refer to different coefficients based on which subranges of the SPRT were calibrated For example if the 273 15 K to 933 473 K subrange was used A B and C would refer to A7 B7 and C7 whereas if the 273 15 K to 692 67 K subrange was used A and B would refer to A8 and B8 and C 0 To key in the deviation coefficients for a custom SPRT 1 Select RTD measure mode as given in the Resistance Temperature Detector RTD and Ohms Measure section of this chapter Push until the SPRT type is selected Push to show the prompt SET 1 RECALL 2 Push 1 to select custom SPRT data entry At the ENTER MIN TEMP prompt key in the minimum temperature limit for the custom SPRT and push enren 6 Atthe ENTER MAX TEMP prompt key in the maximum temperature limit for the WR V N Primary Inputs and Outputs 2 Thermocouple TC Measure custom SPRT and push At the ENTER RTPW prompt key in the nominal resistance value RTPW for the custom SPRT and push enren At the ENTER COEFF A prompt key in the first A deviation coefficient for the custom SPRT and push To key in a coefficient that includes an exponent key in the mantissa push and to select the EXP function key in the exponent and push enra When prompted use the same method to key in the second B third C fourth A and fifth B d
77. ommon commands interface messages are not sent literally in a direct method They are changed to parallel signal levels on the bus data and control lines IEEE 488 standards define interface messages which are managed automatically in most cases 5 8 LCD and Remote Interface Setup Procedures 5 Command Use 4 Compound Commands A compound command is two or more commands put on one command line isolated from each other with semicolons For example the subsequent two individual commands OUT 1 V OPER can be mixed into the compound command OUT 1 V OPER These commands tell the Product to source 1 V dc and then go into operate mode 5 Overlapped Commands Commands that start execution but take more time than the usual communication command response interval to complete are overlapped commands This 15 because they can be overlapped by receipt the command that follows before they are complete The detailed command descriptions in Chapter 6 show a check mark by Overlapped for overlapped commands Use the command WAI to stop until the overlapped command is complete before you do the command that follows For example OUT 1 V WAI You can also use the status commands OPC and OPC to find the overlapped commands that are complete 6 Sequential Commands Commands that operate immediately are sequential commands The command descriptions in Chapter 6 show a check mark by Sequential for sequential commands Most commands a
78. on of Chapter 5 Parameter lt None gt Response lt value gt where lt value gt is the decimal equivalent of the SRE byte 0 to 191 Example SRE 48 This example is an indication that bits 4 MAV and 5 ESB are enabled STB IEEE 488 RS 232 Sequential Overlapped Status Byte Register query This command shows the byte in the Status Byte Register See the Status Byte Register STB description in the Check Product Status section of Chapter 5 Parameter lt None gt Response lt value gt where lt value gt is the decimal equivalent of the STB byte 0 to 255 Example STB 96 This example is an indication that bits 5 ESB and 6 MSS are set STBY Remote Commands 6 Remote Command List X IEEE 488 X RS 232 Sequential X Overlapped This command puts the Calibrator in standby mode This stops the output at front panel terminals This command does the same as if you push the front panel key when in operate mode Parameter Response Example ST START lt None gt lt None gt STBY This example disconnects the selected output from the Calibrator front panel terminals It also shows Stby on the display x IEEE488 2 2 x Sequential Overlapped This command puts the Calibrator in switch test mode and starts a new switch test If the calibrartor is already is switchtest mode it simply starts a new switch test Parameter Response Example ST CLOSE
79. ou examine and remove the contents keep the package material and carton in the case that shipment is necessary Remove the Package List and make sure that all of the shown equipment is received If there are questions about the shipment contact Fluke See the Contact Fluke Calibration section 7526A Users Manual Standard Equipment Make sure the basic Calibrator package is complete It includes e The Calibrator e Users Manual CD ROM e Getting Started e AC Mains Cord e Thermocouple Shorting Jumper e NIST Traceable Calibration Report USB to Serial Adapter Cable Options and Accessories For more information about these accessories and their prices contact your Fluke representative e 5520A 525A Leads kit e Y7526A Rack Mount kit e Fluke 700 and 525A P series pressure modules e MET CAL with 7526A Function Select Code FSC e MET CAL 7526A calibration procedure 1 6 Introduction Product Description Product Description This section is a general description of the Product Front Panel Overview Figure 1 1 shows the layout of the front panel Each of the three primary divisions 15 given in the subsequent sections CIC Eg EJ exe E c Lz SET RECALL AUTOSET A HI aa RNGLOCK LOCAL EXP K CC E to gwp001 eps Primary input output terminals See the Primary Input Output Terminals section of this 2 chapter 6 Primary input output display and controls Se
80. panel rocker switch The Product will power up in a few seconds It briefly shows the model number and firmware version in the primary display before it changes to the correct input output display Note If a correct power up display does not occur in 30 seconds turn off the power Turn on the unit after a few seconds If the problem continues report the problem to Fluke immediately Warmup time is two times the time since its last warmup to a maximum of 30 minutes To keep the Product stable it is best to keep the Product on all the time Specifications General Specifications Warm up Time Settling Time Standard Interfaces Temperature Performance Operating o2icceiiusetr or etapas cns Calibration tcal x jfelgzie RR NOE NUN Electromagnetic Compatibility Temperature Coefficient Relative Humidity Altitude Analog Low Isolation Line Power Line Voltage selectable Line Frequency ss Line Voltage Variation Power Consumption Dimensions Weight without options IEEE 488 GPIB 0 C to 50 C 18 C to 28 C 20 C to 70 C CE Conforms to EN61326 operation in controlled EM environments
81. r Parameter lt None gt Response lt None gt Example LOOP POWER ON This example enables the isolated DC current input 24V loop power Remote Commands 6 Remote Command List OPC xX IEEE 488 X RS 232 X Sequential Overlapped Operations Complete command This command sets bit 0 OPC of the Event Status Register to 1 when all pending device operations are complete Also see the ESR command Parameter lt None gt Response lt None gt Example OPC This example sets bit 0 of the Event Status Register to 1 when all pending device operations are done OPC IEEE 488 R5 232 Sequential Overapped Operations Complete query This command shows a 1 after all pending Calibrator operations are complete This command does not answer until all pending Calibrator operations are complete and causes the control program execution to pause until operations are complete Also see the WAI command Parameter lt None gt Response l Example OPC l This example does not answer until all pending Calibrator operations are complete and then shows 1 OPER IEEE 488 RS 232 Sequential Overlapped This command puts the Calibrator in operate mode and start the output at the front panel terminals This command does the same as if you push the front panel key when in standby mode Parameter None Response lt None gt Example OPER This example connects the selected output to the Calibrator front panel terminals
82. re 5 4 Status Register Overview Table 5 6 shows the status registers and gives the read write commands and related mask registers to use them Table 5 6 Status Register Summary Status Register Read Command Write Command Serial Poll Status Byte STB se ooo e o Service Request Enable Register SRE Event Status Register ESR Event Status Enable Register ESE Each status register and queue has a summary bit in the Serial Poll Status Byte Enable registers are used to mask different bits in the status registers and to make summary bits in the Serial Poll Status Byte For IEEE 488 interface operation the Service Request Enable Register is used to assert the SRQ control line on detection of A status condition or conditions that the programmer chooses For RS 232 interface operation the SRQSTR string is sent through the serial interface when the SRQ line is set 5 13 7526A Users Manual 5 14 l Serial Poll Status Byte STB The Calibrator sends the serial poll status byte STB when it answers to a serial poll This byte is set to 0 when the power is turned on The STB byte structure is shown in Table 5 7 Refer to the STB command in Chapter 6 for more information on how to read this register Table 5 7 Serial Poll Status Byte STB and Service Request Enable SRE Registers Requesting Service The RQS bit is set to 1 when bits ESB MAV EAV or ISCB change from 0 to 1 and are enabled 1 in the SRE When RQ
83. re sequential 7 Commands for RS 232 Only Some commands are used only for RS 232 serial operation because these functions must be done as IEEE uniline single control line bus management messages per the IEEE Standards For example the command REMOTE can be sent as data through the IEEE 488 interface to put the Product into remote operation mode but it is not because the IEEE Standards tell you that the remote function to be sent to the device as the uniline message REN This 15 also true for some other commands and functions as shown in Table 5 3 with their RS 232 equivalents For these commands the detailed command descriptions in Chapter 6 show a marked box beside RS 232 but no check marked box beside IEEE 488 5 9 7526A Users Manual Table 5 3 Commands for RS 232 Only IEEE 488 Message RS 232 Equivalent LOCAL command REMOTE command LOCKOUT command 8 Commands for IEEE 488 These are all of the commands but those used for RS 232 only as shown above All commands are moved through the IEEE 488 as data but the commands LOCAL REMOTE and LOCKOUT which are done per the IEEE Standards as uniline messages The detailed command descriptions in Chapter 6 show a check mark beside IEEE 488 for these commands Command Syntax The subsequent syntax rules are for all of the remote commands Information about the syntax of response messages 15 also given 1 Parameter Syntax Rules Table 5 4 shows the units permitted i
84. revision level always 0 PRES FLUKE 610070 0 This example is an indication that the manufacturer is Fluke the serial number 1s 610070 and the firmware version 15 0 PRES MEAS Remote Commands 6 Remote Command List IEEE 488 x RS 232 Sequential X Overlapped This command changes the primary display operation mode to pressure measurement Parameter Response Example PRES UNIT None None PRES MEAS This example changes the primary display operation mode to pressure measurement X IEEE 488 X RS 232 Sequential X Overlapped This command sets the primary display pressure units Parameter Response Example value where value 1s one of these PSI INH204C INH2020C INH2060F CMH204C CMH2020C MMH204C MMH2020C MBAR KPA MPA INHG MMHG KG CM2 lt None gt PRES UNIT BAR pounds per square inch inches of water at 4 C inches of water at 20 C inches of water at 60 F centimeters of water at 4 C centimeters of water at 20 C millimeters of water at 4 C millimeters of water at 20 C BAR bars millibars kilopascals megapascals inches of mercury at 0 C millimeters of mercury at 0 C kilograms per square centimeter This example sets the primary display pressure units to bars 6 19 7526A Users Manual 6 20 PRES UNIT X IEEE 488 x R5 232 X Sequential L_ Overlapped This command shows the primary display pressure units P
85. rst selected the Product is put into standby Stby mode which puts the positive output jack into a high impedance condition 7100 kN for safety To put the output into the active condition push to toggle between the standby and operate modes 8 The standby mode 1s also started in these situations e Ifa fault occurs during operation such as an overload or short circuit condition e Asa safety feature for all new outputs larger than 30 V dc Refer to the product specification section of this manual for maximum drive currents 2 3 7526A Users Manual Notes Scrolling the output when the output value is already larger than 30 V will not place the Calibrator in standby mode for each new value Automatic setpoints higher than 30 V will not put the Calibrator in standby mode for each new value 9 The Product can be locked to a specified voltage range Select a value in that range and then push and to select the secondary RNG LOCK function DC Current Output The Product can source dc current from 0 mA to 100 mA 1 Disconnect test leads from external devices 2 Push to select dc voltage and current mode if not already selected 3 Ifdc voltage mode is shown push the key again to go to dc current mode 4 Connect the UUT to the current output terminals of the Product as shown in Figure 2 2 Unit Under Test UUT BEN DC Current In p ut 7526A PRECISION PROCESS CALIBRATOR Calibration A 0 UTP A
86. s Register query This command shows the contents of the Event Status Register ESR and clears the register See the Event Status Register ESR in the Check Product Status section of Chapter 5 Parameter Response Example lt None gt value where value is the decimal equivalent of the ESR byte 0 to 255 ESR 6l This example shows decimal 61 binary 00111101 which is an indications that bits 5 CME 4 EXE 3 DDE 2 QYE and 0 OPC are enabled FAULT Remote Commands 6 Remote Command List x IEEE488 2 2 X Sequential Overlapped This command shows the most recent error code from the error queue If the queue is empty no errors have occurred it shows 0 The command is typically used to verify that the prior command did what it was intended to do Parameter Response Example FUNC lt None gt lt value gt where lt value gt is one of the error codes documented in Chapter 6 FAULT 105 This example shows the error code which will occur if the prior command tried to set a value more than 100 mA for current output The error code 105 is an indications that the value was above the maximum limit for the selected output range X IEEE 488 2 2 x Sequential Overlapped This command shows the current output measurement or calibration function for the primary and isolated displays Parameter Response Example lt None gt lt isola
87. s given above V DC volts A DC current OHM Resistance CEL Temperature in Celsius FAR Temperature in Fahrenheit Response lt None gt Examples Explanation OUT 15 2 V Change to DC volts output 15 2 V OUT 1 2 mA Change to DC current output 1 2 mA note units prefix multiplier m OUT 5 Ohm Change to Resistance output 5 O OUT 100 CEL Change to temperature in C output 100 C OUT 3 No change to output mode output a value of 3 in the current units 7526A Users Manual 6 18 OUT X IEEE 488 x R5 232 X Sequential Overlapped This command shows the current output value and units of the Calibrator Parameter Response Examples PRES lt None gt lt value gt lt units gt where lt value gt is the current output value and where lt units gt is one of these V DC volts A DC current OHM Resistance CEL Temperature in Celsius FAR Temperature in Fahrenheit Explanation OUT 1 88300E 02 A Current output is 18 83 mA OUT 1 23000E 00 V Current output is 1 23 V OUT 4 00000E 03 OHM Current output is 4 0 KO OUT 1 0430E 02 CEL Current output is 104 3 C IEEE 488 RS 232 Sequential Overlapped This command queries the connected pressure module for its manufacturer serial number and firmware version Parameter Response Example None text string where text string contains the subsequent three fields isolated by commas 1 Manufacturer 2 Serial number 3 Firmware
88. sess Isolated Input Display Controls and Terminals REPR e A E EE TTS ay sy OS E Error WES SACS a22292 99999 100 990 0 5000039 200009039003 910 0 59900 rO SEO aii viU aeuans A General 5060111681 IOHS o uei rhetor RIS E E ION EUR DC Voltage Specifications Output eeeeeeessesessseeeeeeeeennnnnnnnnns DC Voltage Specifications Isolated Input seeeeeeeuuusssee DC Current Specifications Output esses DC Current Specifications Isolated Input eeeeeeeeeeesessss Resistance Specifications Output esses Resistance Specifications Input eese Thermocouple Specification Output and Input eeesesesssss RTD and Thermistor Specification Output cccccesssssssssssssseeeeeeeeees RTD and Thermistor Specification Input cccccseesssessssssssssesessseeeeees Pressure Measurement Specifications c ccsssssssssessssesssssssssseeseesseseeeens Switch Test Specifications Isolated Input ssssseeee 2 Primary Inputs and Outputs e eeceeeeee eene eeu TS RP EA EEO EE EEA AT DC Voltage OUMU aaa nn nae ee nr Re rc OT aor ne DE Current OUMU oaov ee ne RAT CCST Pree EE Rite mtr mie di
89. sories that are not necessary for the measurement e Do not use the Product if it operates incorrectly e Do not use and disable the Product if it is damaged Introduction 1 Unpack the Product Table 1 1 shows the symbols used on the Product and in this manual Table 1 1 Symbols This product complies with the WEEE Directive 2002 96 EC marking requirements The affixed label indicates that you must not discard this electrical electronic product in domestic household waste Product Category With reference to the equipment types in the WEEE Directive Annex this product is classed as category 9 Monitoring and Control Instrumentation product Do not dispose of this product as unsorted municipal waste Go to Fluke s website for recycling information Hazardous voltage Risk of electric Fuse shock AC Alternating Current S Protective Earth Ground Earth ground C Conforms to European Union directives m Alternating Current and DC This product has been tested to the requirements of CAN CSA C22 2 No 61010 1 Q Pressure third edition Unpack the Product When you receive the Product examine the container and equipment for signs of damage Note indications of damage while in transit Immediately report damage to the shipping agent Risk of Danger Important information See Manual Note The carrier will not honor claims unless all shipment material is kept for their inspection After y
90. stance Temperature Detector RTD and Ohms Measure and Resistance Temperature Detector RTD and Ohms TYPE Source sections of this chapter and push until the low or high ohms range is selected e Short the RTD Q terminals with the test leads normally used for RTD Q measurements e tis necessary for the test leads and terminals to stabilize to the same temperature They are stable in approximately 3 minutes e Push and 9 to zero the ohms range Resistance Temperature Detector RTD and Ohms Source The Product can source all common RTD types and 5 custom RTD curves in F or C plus basic resistance from 5 Q to 4000 Q The Product uses these common RTD types e Dt385 100 Q 200 Q 500 Q 1000 Q e Ppt3926 100 Q e Pt3916 JIS 100 Q e Nil20 120 e Cu 427 Minco 10 Q e YSI 400 1 Disconnect test leads from external devices 2 Push to select thermocouple and RTD Q mode if not already selected If thermocouple mode is shown push the key again to go to RTD Q mode 3 Ifinput mode is shown push and to select output 4 Push to select the necessary RTD curve or ohms range The set up and use of custom RTD coefficients is given in the Resistance Temperature Detector RTD with Custom Coefficients section of this chapter 5 Connect the UUT to the RTD Q output terminals of the Product as shown in Figure 2 4 Unit Under Test UUT RTD Q Input 7526A PRECISION PROCESS CAL Calibration
91. switch but the display will show OPEN as an alternative to CLOSE 4 18 Chapter 5 LCD and Remote Interface Setup Procedures a oduc PTS NT T Access LCD and Remote Interface Setup Procedures Set Up the RS 232 Port for Remote Control Use with Computer USB Set Up the IEEE 488 Port for Remote Control cccccccceeeeeeeeeeeeeeees Change Between Local and Remote Operation eeeeeeeeeeee IBEE 459 Interface Command Command Sy AX RERO TT Check Prod ci Stalis srair e a 5 1 7526A Users Manual 5 2 LCD and Remote Interface Setup Procedures 5 Introduction Introduction This chapter tells you how to set up and use the Remote Interface It also explains the IEEE 488 interface and gives a listing of remote commands and their functions Access LCD and Remote Interface Setup Procedures To access LCD and Remote Interface setup procedures Push and 4 to select the SETUP function At the LCD CONTRAST prompt push or to adjust the LCD contrast Push enren At the LCD BACKLIGHT prompt push or to adjust the LCD backlight Push enren At the Remote Interface prompt push or to select the RS 232 interface or the GPIB interface When the necessary interface is selected push ev 7 Ifthe GPIB interface is selected the GPIB Address prompt is show
92. t accuracy it is recommended to zero the TC millivolt circuit daily or if the Product is used out of the ambient temperature range of 18 C to 28 C This procedure is given in the Thermocouple T C Measure section of this chapter Pressure Measure Many ranges and types of pressure modules are available from Fluke The Product can use the Fluke Model 700 Series Modules Before you use a pressure module read its instruction sheet Pressure modules vary in use media and accuracy 1 Connect the pressure module to the Product as shown in Figure 2 7 Pressure Module 4W RTD O INPUT gwp016 eps Figure 2 7 Pressure Module Connection 2 Push Rj The Product automatically senses which pressure module is attached and sets its range accordingly Push to select the necessary pressure units to show 4 Before you attach the module to the pressure source zero the module as given in the instruction sheet that came with the module Procedures can be different but all use 20609 5 Attach the module to the pressure source Refer to the instruction sheet that came with the module Follow all safety precautions when you do work with high pressures 2 12 Primary Inputs and Outputs Pressure Measure Pressure modules that can be used with the Product are listed 1n Tables 2 3 and 2 4 Table 2 3 Fluke 700 Series Pressure Modules 2 2 13 7526A Users Manual Table 2 4 Fluke 525A P Series Pressure Modules
93. t pushes of this key cycle through the pressure units Pressure input mode uses the 2 pressure module connector on the primary input output side Each side can use pressure mode at the same time and can be set to show the same pressure measurement in different units if necessary Input Terminals 7 Common input terminals for dc voltage and current 1 These terminal binding posts are made of a special copper alloy to decrease thermal EMF s Discreet wires or standard banana plugs can be used and the HI LO pairs are distanced for standard dual banana plugs 2 AA Warning To prevent possible electrical shock fire or personal injury Do not exceed a maximum of 100 V peak to chassis ground Figure 1 4 Isolated Input Display Controls and Terminals cont Rear Panel Figure 1 5 shows the rear panel layout NO INTERNAL USER SERVICEABLE PARTS O O O O O O O O O O O O O O O O SERVICE PERSONNEL ooooo0oo0oo000000000000 0 FLUKE CORPORATION SODCCOAOCOCCCCACOCCCOCO cours OIOIOIOIOOQOOIOIOOQOOO0Q0O0O0 0 A WARNING FOR FIRE PROTECTION REPLACE ONLY F WITH A 250 V FUSE OF INDICATED RATING R RoH C N10140 47 Hz 63 Hz 15 VA MAX mm Mops c ee ee Mined IEEE GPIB PeR OOOOOOOOOOOOOOOOOO pii OIOODOOOOOOOOCOOOCOO QOO ooooo0oo0o000000000000 0 m 99 1919 99 9 99 9 9 9 9 9 9 9 gwp05 eps Description RS 232 9 pin connector for remote control of the Product with a computer s
94. t to 0 when the power is turned on 7 Bit Assignments for the ESR and ESE The bits in the Event Status Register ESR and Event Status Enable register ESE are as Shown in Table 5 8 Table 5 8 Event Status Register ESR and Event Status Enable ESE Registers Power on This bit is set to 1 if line power has been turned off and on since the last time the ESR was read Command error The IEEE 488 interface of the Product encountered an incorrectly formed command and placed an error code in the error queue The command FAULT can be used to fetch error codes from the error queue which is described in more detail below Execution error An error occurred when the Product tried to execute the last command an error code was placed into the error queue This could be caused for example by a parameter being out of range The command FAULT can be used to fetch error codes from the error queue which is described in more detail below Device dependent error An error related to a device dependent command has occurred Query error The Product was addressed to talk when no response data was available or appropriate or when the controller failed to retrieve data from the output queue Operation complete All commands previous to reception of a OPC command have been executed and the interface is ready to accept another message 8 Programming the ESR and ESE To read the contents of the ESR send the remote command ESR The ESR 15 cl
95. te Command List ZERO MEAS IEEE 488 RS 232 Sequential Overlapped This command shows the zero offset for pressure modules thermocouple millivolts or RTD ohms Parameter None Response zero offset gt lt units gt where lt zero offset gt is the current offset and where units is one of these OHM Ohms V DC volts thermocouple millivolts Or one of the pressure units listed with the PRES UNIT command Example ZERO MEAS 1 060000E 01 PSI This example is an indication that the pressure zero for the connected module is 0 106 psi 6 35 7526A Users Manual 6 36 Chapter 7 Maintenance Title Page EALA ENE HOS eerte ma etel tatem AE I Em telum MR UE Pee ze C abibrdEOR esee ne ee Onn Ce re nee Eun Dn uiam iu 1 3 a e E E E E T E RAM UM 73 Change the bine V 0199 stenstcasesniasinedeadevadeekeaenstensdvnseecdaceation 7 1 7526A Users Manual 7 2 Maintenance fT Introduction Introduction This chapter tells you how to do the usual maintenance and tasks necessary to keep the Product in service A ANWarnings To prevent possible electrical shock fire or personal injury e Have an approved technician repair the Product e Disconnect the mains power cord before you remove the Product covers e Do not operate the Product with covers removed or the case open Hazardous voltage exposure is possible e Use only specified replacement parts Clean the Calibrator Clean the
96. ted gt lt primary gt where lt isolated gt is one of the following DC10V measure DC voltage 10V range DC100V measure DC voltage 100V range DCI measure DC current PRESSURE measure pressure and where primary is one of the following DCV source DC voltage DCI source DC current RTD OUT source RTD Ohms RTD IN measure RTD Ohms TC OUT source thermocouple TC IN measure thermocouple PRESSURE measure pressure FUNC DC10V PRESSURE This example is an indication that the isolated display is selected to the 10V range and the primary display is selected to pressure 6 9 7526A Users Manual 6 10 HART IEEE 488 RS 232 Sequential Overlapped This command shows the isolated DC current input HART resistor status Parameter lt None gt Response lt value gt where lt value gt is ON or OFF Example HART OFF This example is an indication that the isolated DC current input HART resistor is turned off HART OFF IEEE 488 R5 232 Sequential Overlapped This command disables the isolated DC current input HART resistor Parameter lt None gt Response lt None gt Example HART OFF This example disables the isolated DC current input HART resistor HART ON IEEE 488 RS 232 Sequential Overlapped This command enables the isolated DC current input HART resistor Parameter lt None gt Response lt None gt Example HART ON This example enables the isolated DC current input HART resistor IDN Remote Co
97. temperature They are stable in approximately 3 minutes Unit Under Test U U T Il 7526A PRECISION PROCESS CALIBRATOR Thermocouple Output rors A 9 0 0 OUTPUT A 100V MAX 1 PK X OV e sal LO LO wer ae MA y 4W RTD O A gwp014 eps Figure 2 5 Thermocouple Input Connection Push and e to toggle the thermocouple display between F and C Push and 5 to toggle the cold junction compensation between the internal temperature sensor and an external reference For best accuracy it is recommended to zero the TC millivolt circuit daily or if the Product is used out of its ambient temperature range of 18 C to 28 C The maximum offset from unit calibration that can be zeroed out is 1 mV To zero the TC millivolt circuit l Select the thermocouple measure function and push until the millivolt range is selected Put the supplied thermocouple shorting jumper into the thermocouple terminals It is necessary for the jumper and terminals to stabilize to the same temperature They are stable in approximately 3 minutes Push and 9 to zero the TC millivolt circuit Primary Inputs and Outputs 2 Thermocouple TC Source Thermocouple TC Source The Product can source all common thermocouple types in F or C plus basic millivolts from 10 0 mV to 75 0 mV The following common thermocouple types are supported e B e GCHanvrarFazarearA THO e lt
98. the user A Caution identifies conditions and procedures that could cause Product damage equipment under test damage or permanent loss of data A ANWNarnings To prevent possible electrical shock fire or personal injury e Read all safety Information before you use the Product e Carefully read all instructions e Use the Product only as specified or the protection supplied by the Product can be compromised e Use this Product indoors only e Examine the case before you use the Product Look for cracks or missing plastic Carefully look at the insulation around the terminals e Use only the mains power cord and connector approved for the voltage and plug configuration in your country and rated for the Product e Replace the mains power cord if the insulation is damaged or if the insulation shows signs of wear e Make sure the ground conductor in the mains power cord is connected to a protective earth ground Disruption of the protective earth could put voltage on the chassis that could cause death e Donot put the Product where access to the mains power cord is blocked e Do not touch voltages gt 30 V ac rms 42 V ac peak or 60 V dc e Use only cables with correct voltage ratings e Do not apply more than the rated voltage between the terminals or between each terminal and earth ground e Donotuse the Product around explosive gas vapor or in damp or wet environments e Remove all probes test leads and acces
99. tion of the Product uses the Callendar Van Dusen equation to source and measure custom RTD s The C coefficient is only used for the subrange 260 C to 0 C Only the A and B coefficients are necessary for the subrange 0 C to 630 C The RO value is the resistance of the probe at 0 C All five of the custom RTD curves are set to PT385 at the factory as shown in Table 2 1 Table 2 1 Default Custom RTD Coefficients Curve Subrnge RO Coefficient A Coefficient B Coefficient C 0 to 630 3 9083e10 3 57756107 Jo 00 2 260100 3 9083e10 3 5 775e10 7 4 183e10 12 0 to 630 100 3 9083e10 3 5 5e10 7 4 26000 3 9083e10 3 5 775e10 7 4 183e10 12 5 010630 39083103 775107 0 Table 2 2 shows the coefficients for RTD types PT391 and PT392 The C coefficient 15 only used for temperatures less than 0 C Table 2 2 Other Common RTD Coefficients RTD Type RO Coefficient A Coefficient B Coefficient C PT392 3 9848e10 3 5 8 e10 7 4 0e10 12 PT391 3 9692e10 3 5 8495e10 7 4 2325e10 12 Standard Platinum Resistance Thermometer SPRT Coefficients 2 8 The SPRT function of the Product uses ITS 90 standard coefficients as a basis to measure a SPRT The five custom coefficients are keyed in as deviations from the standard coefficients and as such all of them are set to zero at the factory The coefficients A and B refer to the A4 and B4 coefficient These are received when the SPRT is calibrated at the triple p
100. und they are put into the fault queue where they can be read by the FAULT query Parameter Response Example lt None gt lt value gt where lt value gt is one of these 0 failed self test passed self test TST I This example runs the self test and shows that it passed VAL Remote Commands 6 Remote Command List IEEE 488 RS 232 Sequential Overlapped This command shows the last values for the isolated and primary measurements in that sequence Parameter Response Example None lt iso value gt lt iso units gt lt primary value gt lt primary units gt where lt iso value gt is the current isolated measurement expressed in scientific notation and where lt iso units gt is one of these V DC volts A DC current OVER measurement is over or under range Or one of the pressure units listed with the ISO PRES UNIT command and where lt primary value gt is the current primary measurement expressed in scientific notation and where lt primary units gt 1s one of these FAR F CEL C OHM Ohms V DC volts thermocouple millivolts OVER measurement is over or under range NONE primary display is currently set to a source mode 01 one of the pressure units listed with the PRES UNIT command VAL 2 137000E 00 V 5 763300E 01 CEL This example is an indication that the isolated measurement 15 2 137 volts and that the primary measurement is 57 633 C 6 33
101. ut display controls and terminals meee A A a e fll gwp004 eps CENE EN A two line 16 character display gives all visual user feedback for the isolated input operations See the 0 Display Display Layouts section of this chapter for layout information and the Error Messages section of this chapter for possible error messages Function Keys This key is used for multiple functions In normal operation itis used to move through the 50 mA 10 V and 100 V ranges SW TEST If held for 3 seconds it will change the Product into or out of switchtest mode In switchtest recall mode it will move through the stored switch test data When you use 24 mA mode to verify a two wire loop powered transmitter disconnect it from its wires and push m This turns on an internal 24 V power supply in series with the current measurement circuit Push the key again to turn off the 24 V supply In all switch test modes push this key to start or stop a test When you use 50 mA mode to verify a HART configuration device push this key to turn on an internal 250 resistor in series Push the key again to turn off the resistor Note that when you turn on this resistor the maximum load driving functionality drops from 1000 Q at 20 mA to 750 Q at 20 mA Figure 1 4 Isolated Input Display Controls and Terminals Introduction 1 Product Description Selects Pressure input mode Subsequen
102. uuuuusee Temperature Switch Pressure Switeh AA Epi MD 5 LCD and Remote Interface Setup Procedures InsrOGUC MOMs E E Access LCD and Remote Interface Setup Procedures eeussess ISCPHOTE THEO ACG ssa sec ay ionseceaueezaton E E Meu M ES A UE Set Up the RS 232 Port for Remote Control Use with Computer USB nennen nnns Set Up the IEEE 488 Port for Remote Control sss Change Between Local and Remote Operation seeeeeeeeese IBBEB 458 Interface OVerVIG Wes iesoetedetieteng xdees dex ipia dieto to dau emet ades RE Gro nii S C cE O Command VIE Checks Product Stas eicere Ee a a MORIS RE UR PR ORM SCENES 6 Remote Commands ee enu nn heh Res ase ue ura Der OOo CI OBS cesset vst E Punti Command Summary Remote Command Contents continued Ine m ROSE 6 ROT E wien Fae 73 o CI camthe Calibrator osaeraren aeea ao a aenea Replace a Line TUSE sprr aA EEE EA EAT AEO MM Change the Line Voltage 00s05sssncdsnnnsoanensacasegesneiavedeseedecesateetensaccsedeoacenadeasacnadeeas 777 7526A Users Manual List of Tables Table Title
103. witch contact closes gwp036 eps gwp037 eps 3 5 7526A Users Manual 3 6 After the second contact transition the switch opens After the second contact transition the Calibrator enters the recall mode gwp035 eps 2 Push 88 gwp038 eps 3 Push SB gwp039 eps When necessary push to reset the switch test Hold down for 3 seconds to put the Calibrator into the isolated input mode that was selected before Output Setpoints Nine preset output setpoints can be stored and recalled for each of these output modes Voltage Current Each thermocouple type this includes millivolts Each RTD type this includes each of the five custom curves They can be recalled on an individual basis or as an automatic up and down cycle with a configurable dwell time between each setpoint The automatic cycle feature starts at setpoint number 1 and steps to a user specified end setpoint number It then goes back down in reverse sequence and cycles through the sequence again To set a setpoint l 2 3 4 Select the output mode Type the output value for the setpoint Push and _1 to select the SET function At the setpoint number selection prompt SET POINT push the numeric key 1 to 9 for the setpoint to be set If the automatic cycle feature 15 to be used make sure to correctly sequence the setpoint values It always cycles between setpoint number 1 and a user specified end setpoint number
104. ypes e Pt 385 100 Q 200 Q 500 Q 1000 Q e Pt3926 100 Q e Pt3916 JIS 100 Q e Nil20 120 e Cu 427 Minco 10 Q e YSI 400 Disconnect test leads from external devices 1 Push to select thermocouple and RTD Q mode if not already selected If thermocouple mode is shown push the key again to go to RTD Q mode 2 Ifoutput mode is shown push and to select input mode 3 Push to select the necessary RTD type the custom curve the SPRT or the necessary ohms range The setup and use of custom RTD coefficients is given in the Resistance Temperature Detector RTD with Custom Coefficients section of this chapter The set up and use of SPRT coefficients 15 given in the Standard Platinum Resistance Thermometer SPRT Coefficients section of this chapter 4 Connect the UUT to the 4 wire RTD Q input terminals of the Product as shown in Figure 2 3 Unit Under Test UUT RTD O Output gwp012 eps Figure 2 3 RTD Q Input Connection 5 Push and e to toggle the RTD display between F and C 6 For best accuracy it is recommended to zero the RTD resistance circuit s daily or if you will use the Product out of the ambient temperature range of 18 C to 28 C The maximum offset from unit calibration that can be zeroed out is 0 1 Q for the high range and 0 01 Q for the low range 2 5 7526A Users Manual To zero a RTD resistance circuit e Select the RTD measure function as in the Resi

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