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1. Figure D Front Panel of PPS 1200 Series 1 8 12 9 13 10 14 11 15 ge Dx NN terzo PROGRAMMABLE DC POWER SUPPLY FUNGTION DATA ENTRY Com m OCP VSET ISET LCL 7 8 9 CLEAR MTE 4 002V 0 000A GWET ace moon GUTPUT 4 5 6 ONIOFF OVP A a BEEP i 1 2 3 seLEcT 4 v UTILITY 0 ENTER POWER i po O Pore CE S ee 2 16 19 20 17 21 18 23 22 Figure C Front Panel of PPS 1001 2015 2016 Series 1 8 12 9 13 10 14 11 15 Z P K N terzo PROGRAMMABLE DC POWER SUPPL Y FUNCTION DATA ENTRY ccm m 0cP1 VSET F ISET TRK LCL cc2 m 1 002V 0 000A amp oce 7 8 9 CLEAR mr 0 000V 0 000A 9 over oce n 4 5 6 ON OFF OVP A BEEP CH 1 2 3 SELECT lt v UTILITY 0 ENTER POWER po CH 1 CH2 Ge Es es ae e f Ss gt Q C y Q Q O C ep M Peg d md paa 2 3 4 16 5 19 20 3 17 4 21 5 18 23 22 FRONT PANEL KEYS Most soft keys have two functions The first function of the keys is function entry i e VSET ISET OCP etc The second function for the soft key is numeric data entry i e 2 1 1 lt NOTES gt 0 9 1 LCD Display 2 Power On Off 3 Negative Terminal 4 Ground Terminal 5 Positive Terminal 6 S Terminal 7 8 Terminal 8 VSET 7 9 ISET 8 10 TRK 9 11 LCL CLEAR 12 OVSET 4 13 OCP 5 14 ADDR 6 15 OUTPUT ON OFF 16 OVP 1 17 AQ Displays alphanumeric information with status annunciators A detailed listing of
2. 38 43 257 XS uuo f J I 7 OUTPUT CHANNEL 2 240 Vc 32 30 29 31 33 MAX 28 26 WARNING 27 FOR CONTINUED PROTECTION AGAINST FIRE HAZARD REPLACE ONLY WITH SAME TYPE AND RATING OF FUSE Use only with a 250V fuse Employer uniquement avec un fusible de 250V S OUTPUT CHANNEL 4 __ 32 30 29 31 33 Figure E 2 Rear Panel of PPS 1200 Series Y CAUTION 24 NO OPERATOR SERVICEABLE PARTS INSIDE REFER SERVICING TO TRAINED SERVICE PERSONNEL 28 26 WARNING FOR CONTINUED PROTECTION AGAINST FIRE HAZARD REPLACE ONLY WITH SAME TYPE AND RATING OF FUSE Use only with a 250V fuse Employer uniquement avec un fusible de 250V S S OUTPUT 32 30 29 31 Figure E 3 Rear Panel of PPS 1020 Series 27 33 25 ZU GN GP IB rh J 40 Vc MAX 25 GP IB 2 1 2 REAR PANEL 24 Ventilation ports Exhausts warm air from the unit 25 GPIB Interface 24 pin parallel GPIB interface connector 26 Voltage Selector internal Selects voltage of either 115VAC or 230 240 VAC 10 10 50 60Hz internally 27 Fuseholder Fuseholder for AC line 28 AC receptacle AC plug for power cord 29 Negative Terminal Negative rear screw terminal output for hard wring 30 Positive Terminal Positive rear screw terminal output for hard wring 31 S Negative rear screw terminal for remote sense output Enables hard wiring 32 S P
3. 0 3 10LSB Load Effect Voltage Current Load effect is defined as the maximum change in output due to a load change up to the maximum voltage or current rating 0 001 1mV 1mA 0 001 ImV 1mA Remote sense operation is possible with up to 0 5V drop for positive and negative output load leads 0 001 ImV 1mA Specifications are subject to change without notice 47 SPECIFICATION continued MODEL PPS 1201GSM PPS 1201GSM A PPS 1202GSM Source Effect Maximum output change for a line voltage change within rating Voltage ImV 1mV 1mV Current 1mA 1mA 1mA PARD Periodic and Random Deviation and Noise RMS PK PK 20Hz 20MHz with output ungrounded Voltage 0 5mVrms 10mVp p 0 5mVrms 10mVp p 1mVrms 10mVp p Current 1mArms mArms mArms Temperature Coefficient The temperature coefficient is defined as the change in output per degree Celsius after a 30minute warm up period Voltage 100ppm C 100ppm C 100ppm C Current 200ppm C 200ppm C 200ppm C Drift Stability The drift is defined as the change in output over an eight hour internal under constant line load and ambient temperature after a 30 minute warm up period Voltage 0 01 ImV 0 01 ImV 0 01 ImV Current 0 1 SmA 0 1 5mA 0 1 5mA Load Transient Response The time required for the output voltage to recover within a band of 0 1 of rated voltage around the nominal voltage within a 50 within a 50 vari
4. 2 The supply initially sends an offset current to the output This offset current is measured on the DMM 3 Enter the I Lo value to the power supply by the front panel keys and press ENTER once For example if the DMM reads 103 mV press a E Le 3 enter 4 After calibrating the current offset value the supply sends full scale current to the output This value is measured on the DMM Sa Enter the I Hi value to the power supply by the front panel keys and press ENTER once For example if the DMM reads 3301 V press Esp AAN ESE a ES ee 6 The current calibration is now complete lt NOTE gt For PPS 1200 series Ch 1 and Ch 2 can only be calibrated in sequence applies only in local mode 6 4 REMOTE CALIBRATION The PPS series are able to be calibrated via computer commands Therefore it is not necessary to remove the power supply from the system there are There are several commands available to calibrate These are CALCHNL VOFF VFS IOFF IFS A definition of these commands is presented in appendix A The equipment necessary for calibration are identical to the equipment used in local mode Refer to figures M and N for voltage and current calibration configurations 6 5 CALIBRATION PROGRAM EXAMPLE Please refer to Appendix D 35 SEVEN USER MAINTENANCE SERVICE N 7 1 FUSE REPLACEMENT If the fuse is suspected to be defective it should be inspected and if necessary replaced To inspec
5. LOAD TRANSIENT RESPONSE The time required for the output voltage to recover within a band of 0 196 of rated voltage around the nominal voltage within a 50 variation in load current Recovery Time 50us 50us 50us 50us 50us 50us PROGRAMMING UP DOWN SPEED The total programming UP DOWN time is the sum of output voltage response time and the programming command processing time LSB is the maximum time for the output voltage to vary within 0 025 of a final value UP and DOWN times are the maximum times for the 10 to 90 or to 10 of its total excursion value 3ms 5ms 3ms 5ms 3ms 5ms 3ms 5ms 10ms 15ms 20ms 30ms 20ms 30ms 20ms 30ms 20ms 30ms 20ms 30ms 30ms 40ms 80ms 100ms 2mV 4mA READBACK ACCURACY If the unit is recalibrated at a temperature other 25 C these specifications apply over a temperature band of 5 Caround calibration temperature 0 1 2LSB 0 1 2LSB 0 1 2LSB 0 1 2LSB 0 1 2LSB 0 1 2LSB 0 2 5LSB 0 2 5LSB 0 2 5LSB 0 2 5LSB 0 2 5LSB 0 2 5LSB READBACK TEMPERATURE COEFFICIENT The readback temperature coefficient is defined as the variation in reading per degree Celsius after a 30 minute warm up 100ppm 2mV 100ppm 4mV 100ppm 8mV 100ppm 10mV 100ppm 20mV 100ppm 40mV 200ppm 12mA 200ppm 4mA 200ppm 3mA 200ppm 3mA 200ppm 1mA 200ppm 0 5mA OUTPUT ISOLATION Neither output terminal may be more than 240Vdc from chassis ground 240Vdc 240Vdc 240Vdc 240Vdc 240Vdc 500Vdc TEMPERATURE RATINGS HUMIDITY RANGE Operating 0 C to 40 C 30
6. This key increases the value of the digit to be varied Numeric entry key for number 2 18 BEEP 3 Activates the audible indicator on or off Numeric entry key for number three 19 0 This key moves the cursor one digit left until 1t comes to the desired digit to be varied Numeric entry key for 0 20 We This key decreases the value of the digit to varied Decimal point key 21 gt This key moves the cursor one digit right until it comes to the digit to be varied 22 CH SELECT 1200 Series 23 UTILITY ENTER to metering mode REAR PANEL Figure E 1 E 2 E 3 24 CAUTION NO OPERATOR SERVICEABLE PARTS INSIDE REFER SERVICING TO TRAINED SERVICE PERSONNEL note vv and vi are independent nds and must be disconnected Vp vv NC Ip VI N N N N N N INPUT EXTERNAL PROGRAMMING This key allows you to select channel 1 or channel 2 Applicable only for the PPS Reserved for future use Enters the values in the setting mode and returns the display P4 WARNING FOR CONTINUED PROTECTION AGAINST FIRE HAZARD REPLACE ONLY WITH SAME TYPE AND RATING OF FUSE PA GP IB Use only with a 250V fuse mployer uniquement avec un fusible de 250V S oc S 2 4 4 p ES d OUTPUT 34 35 36 37 32 30 29 31 33 Figure E 1 Rear Panel of PPS 1000 2000 Series CAUTION 24 NO OPERATOR SERVICEABLE PARTS INSIDE REFER SERVICING TO TRAINED SERVICE PERSONNEL
7. 3ms 5ms 20ms 30ms 20mV 1mA 2mA If the unit is recalibrated at a temperature other 25 C these specifications apply over a temperature band of 5 C around calibration temperature 0 1 2LSB 0 2 5LSB 0 1 2LSB 0 2 5LSB 0 1 2LSB 0 2 5LSB 0 1 2LSB 0 2 5LSB 0 1 2LSB 0 2 5LSB The readback temperature coefficient is defined as the variation in reading per degree Celsius after a 30 minute warm up 100ppm 2mV 100ppm 4mV 100ppm 20mV 200ppm 20mA 200ppm 12mA 200ppm 3mA 100ppm 40mV 200ppm 1mA 100ppm 80mV 200ppm 0 5mA Neither output terminal may be more than 240Vdc from chassis ground 240Vdc 240Vdc 240Vdc 500Vdc 500Vdc 0 Cto 40 C 30 to 80 RH 20 C to 70 C 20 to 80 RH SHL AHI T6 TEO LA LEO RL1 SRO PPO DC1 DTO CO E1 19 Ibs 19 Ibs 19 lbs 20 lbs 19 lbs DIMENSIONS 8 4 x5 2 x15 7 for all models Specifications are subject to change without notice 50 B COMMAND SUMMARIES COMMAND DEFINITION ADDRESS Sets the address of the PPS CALCHNL 0 end calibration 1 calibrated channel 1 2 calibrated channel 2 3 calibrated all channels PPS 1200GSM series not available IFS Sets the fullscale current for calibration IOFF Sets the current offset value in calibration ISET Sets the current ISETI Sets the current to channel one PPS 1200 series only ISET2 Sets the current to channel two PPS 1200 series only OCP Set the overcurrent protection PPS 1200GSM series not a
8. A or W key instead of ISET and entry keys When the power supply is in the CC mode pressing A key will increase output current per step The increment step is determined by either pressing or key until the cursor comes to the digit to be varied The LCD module would show the following cursor CC 7 0 04V 1 00 A ui RMT OVP The operation of Y key is similar to A key for decreasing the output when power supply is in CC mode 20 4 5 SETTING THE PROTECTION MODES The power supplies have overvoltage protection OVP and overcurrent protection OCP features to guard against abnormal operating conditions When either of these two functions are activated the unit disables the output The LCD annunciation will indicate the condition and an audible signal will sound 4 5 1 SETTING THE OVERVOLTAGE THRESHOLD To locally program the threshold voltage press OVSET enter the value and press ENTER For example to program an overvoltage value of 4 50V press OVSET UTILITY EN o ener 4 5 2 ENABLING DISABLING OVERVOLTAGE PROTECTION In all models the user can enable or disable the OVP circuit by pressing the OVP 4 key When enable the OVP annunciation is on When the OVP annunciation is blinking the overvoltage protection circuit has been activated and disabled the output An audible signal will also sound To re
9. OR CH 2 PRINT ee VOLTAGE CALIBRATION PRINT 1 output pps calchnll CALL DELAY 3 PRINT 1 enter dmm INPUT 2 rd voff VAL rd PRINT 1 output pps voff STR voff CALL DELAY 3 PRINT 1 enter dmm INPUT 2 rd vfs VAL rd PRINT 1 output pps vfs STR vfs PRINT USING Offset Voltage V Fullscale Voltage V voff vfs cei CURRENT CALIBRATION PRINT 1 output out 1 CALL DELAY 3 PRINT 1 enter dmm INPUT 2 rd ioff VAL rd MULTIPLIER PRINT 1 output pps ioff STR Goff CALL DELAY 3 PRINT 1 enter dmm INPUT 2 rd ifs VAL rd MULTIPLIER PRINT 1 output pps ifs STR ifs PRINT USING Offset Current 7 745 V Fullscale Counter A ioff ifs CALL DELAY 5 PRINT 1 enter PRINT I1 LOCAL END SUB DELAY SECONDS 54 FOR count 1 TO 5000 SECONDS NEXT count END SUB NINE SAFETY PRECAUTIONS SAFETY PRECAUTIONS The PPS Series Programmable Power Supply have been designed and tested according to EN 61010 1 Safety requirement for Electronic Measuring Apparatus SAFETY NOTES The following general safety precautions must be observed during all phases of operation service and repair of this instrument Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture
10. and intended use of the instrument The manufacturer assumes no liability for the customer s failure to comply with these requirements BEFORE APPLYING POWER AN Verify that the product is set to match the available line voltage and the correct fuse is installed GROUND THE INSTRUMENT This product is provided with a protective earth terminal To minimize shock hazard the instrument chassis and cabinet must be connected to an electrical ground The instrument must be connected to the AC power supply mains through a three conductor power cable with the third wire firmly connected to an electrical ground safety ground at the power outlet For instruments designed to be hard wired to the AC power lines supply mains connect the protective earth terminal to a protective conductor before any other connection is made Any interruption of the protective grounding conductor or disconnection of the protective earth terminal will cause a potential shock hazard that could result in personal injury If the instrument is to be energized via an external autotransformer for voltage reduction be certain that the autotransformer common terminal is connected to the neutral earthed pole of the AC power lines supply mains The GPIB option Ground is connected with chassis ground and therefore the operator must take care if the computer is also connected with other measuring devices prevent a short cut FUSES Only fuses with the required rated curre
11. b6 Byte 1 Signifies whether or not the PPS 1200 series is in tracking mode b5 Signifies which mode the power supply is operating in constant current constant voltage b4 Overvoltage has toggled on 1 b3 Overcurrent has toggled on 1 b2 Overcurrent protection mode is on or off b1 The output is on or off RIED op s bO error has occurred b0 Byte 1 CHI or CH2 is selected cursor e Example Reading the Status dual channel After the STATUS command is entered is entered the following ASCII code will be read from the PPS ASCII CODE 30 31 31 35 36 convert to decimal form DECIMAL CODE 0 1 1 5 6 convert to hex form HEX CODE 0484 convert to binary form Byte 1 Byte 0 Nibble 3 Nibble 4 Nibble 1 Nibble 2 0100 BINARY CODE 0000 0100 1000 EXPLANATION OF STATUS BITS BYTE 0b7 BEEP on b5 CHI in CV mode b2 CH1 OCP on bl CH1 OUTPUT on BYTE 1b5 CH2 in CV mode b2 CH2 OCP on b1 CH2 OUTPUT on b0 Cursor at CHI 5 5 PROGRAMMING THE POWER SUPPLY This section provides more detailed requirements of the programming commands available Upon powering up the PPS Series undergo self test and default to the factory settings INITIAL DEFAULT SETTINGS OF PPS COMMAND PPS 1000 series PPS 1020 series PPS 2000 series PPS 1200 series OUT 1 1 1 7 OUTI z 1 OUT2 2 1 VSET 0 0 0 0 27 ISET 0 0140 0 0140 0 0140 0 0140 OVSET maximum maximum maximum VSETI 0 VSET
12. enne enne ennemi ener 14 3 5 1 GV OPERATION oi ai Te re HE eR PEU Ee TUO 14 3 5 2 CC OPERATION 5 iid e ih RR dee ee E E 15 3 5 3 REMOTE SENSING CONFIGURATION Parallel Connection Mode 15 3 6 SERIES CONNECTION OPERATION ene nennen entere innen innen innen enne 16 3 6 1 CV OPERATION sogna aie eben ig 16 3 6 2 CC OPERATION e tee eie d gem drerit ed as 16 3 6 3 REMOTE SENSE CONFIGURATION Series Connection Mode sse 17 3 7 EXTERNAL ANALOG PROGRAMMING PPS 1000 2000 SERIES eene 17 FOUR PUn Un 19 4 1 INTRODUCTION teeth tee re EE ER OY tn tne 19 4 2 GENERATE INFORMATION 2 2 2 22 22 tr PR EHE P TERR ED RR oie 19 4 3 SETTING VOETAGE ettet ER na ame 19 4 4 4 5 4 5 1 4 5 2 4 5 3 4 6 4 7 4 8 4 9 FIVE 5 1 5 2 5 2 1 5 2 2 5 3 5 3 1 5 3 2 5 4 5 5 5 5 1 5 5 2 5 5 3 5 5 4 5 5 5 5 5 6 5 6 SIX 6 1 6 2 6 3 6 4 6 5 SEVEN SETTING CURRENT itte etos net i tene ERE Neo ree aea eo ore eee aeo dende Buhl 20 SETTING THE PROTECTION MODES etri eh t titm Hte iride 21 SETTING THE OVERVOLTAGE THRESHOLD eese nene eee nere 21 ENABLING DISABLING OVERVOLTAGE PROTECTION 21 ENABLING DISABLING OVERCURRENT PROTECTION csse 21 ENABLING DISABLING OUTPUTS 2 525222 2ER 21 TRACKING OPERATION PPS 1200 SERIES eene ennemis 22 RANGE OPERATION PPS 1020 SERIES ounri a eene ennemi eere ere nnne 22 AUDIBLE S
13. 50us 50us PROGRAMMING UP DOWN SPEED The total programming UP DOWN time is the sum of output voltage response time and the programming command processing time LSB is the maximum time for the output voltage to vary within 025 of a final value UP and DOWN times are the maximum times for the 10 to 90 or to 10 of its total excursion value 3ms 5ms 3ms 5ms 3ms 5ms 3ms 5ms 10ms 15ms 20ms 30ms 20ms 30ms 20ms 30ms 20ms 30ms 20ms 30ms 30ms 40ms 80ms 100ms 2mV 4mA READBACK ACCURACY If the unit is recalibrated at a temperature other 25 C these specifications apply over a temperature band of 5 C around calibration temperature Voltage 0 1 2LSB 0 1 2LSB 0 1 2LSB 0 1 2LSB 0 1 2LSB 0 1 2LSB Current 0 2 5LSB 0 2 5LSB 0 2 5LSB 0 2 5LSB 0 2 5LSB 0 2 5LSB READBACK TEMPERATURE COEFFICIENT The readback temperature coefficient is defined as the variation in reading per degree Celsius after a 30 minute warm up Voltage 100ppm 2mV 100ppm 4mV 100ppm 8mV 100ppm 10mV 100ppm 20mV 100ppm 40mV Current 200ppm 6mA 200ppm 4mA 200ppm 2mA 200ppm 3mA 200ppm 1mA 200ppm 0 5mA OUTPUT ISOLATION Neither output terminal may be more than 240Vdc from chassis ground 240Vdc 240Vdc 240Vdc 240Vdc 240Vdc 500Vdc TEMPERATURE RATINGS HUMIDITY RANGE Operating 0 C to 40 C 30 to 80 RH Storage 20 C to 70 C 20 to 80 RH GPIB INTERFACE CAPABILITY SHL AHI T6 TEO LA LEO RL1 SRO PPO DC1 DTO CO E1 WEIGHT 18 Ibs 18 Ibs 18 lbs 18 lbs 18 lbs DIMENSIONS 8
14. LSB is the maximum time for the output voltage to vary within 0 025 of a final value UP and the DOWN times are the maximum times for 10 Tup Tdn 120ms 130ms 30ms 40ms LSB 250ms 400ms 100ms 120ms READBACK ACCURACY If the unit is recalibrated at a temperature other 25 C these specifications apply over a temperature band of 5 N A Caround calibration temperature Voltage 0 1 2LSB 0 1 2LSB 0 1 2LSB Current 0 2 5LSB 0 2 5LSB 0 2 5LSB READBACK RESOLUTION Voltage 80mV 10mV 10mV Current 0 1mA READBACK TEMPERATURE COEFFICIENT The readback temperature coefficient is defined as the variation in reading per degree Celsius after a 30 0 1mA 10uA minute warm up Voltage 100ppm 80mV 100ppm 10mV 100ppm 10mV Current 200ppm 0 2mA 200ppm 0 2mA 200ppm 0 2mA OUTPUT ISOLATION Neither output terminal may be more than 240Vdc from chassis ground 500Vdc 240Vdc 240Vdc TEMPERATURE RATINGS HUMIDITY RANGE Operating OC to 40 C 30 to 80 RH Storage 20 C to 70 C 20 to 80 RH GPIB INTERFACE CAPABILITY SHLAHLT6 TEO L4 LEO RL1 SRO PP0 DC1 DTO CO E1 WEIGHT 16 lbs DIMENSIONS 8 4 x5 2 x15 7 for all models Specifications are subject to change without notice 42 SPECIFICATION continued MODEL PPS 1021 PPS 1022 AC INPUT One internal switch permits operation of 115 or 230 240 Vac line voltage Input Current 115VAC 1 92A 1 92A 230VAC 0 96A 0 96A Fuse Rating 11
15. OPERATING CHARACTERISITCS AND CONFIGURATIONS 3 1 INTRODUCTION These sections contain information on operating characteristics and how to configure the PPS Series Sections 3 2 through 3 4 consider the power supplies operating ranges remote sense operation and considerations when connecting loads The latter half of the chapter deals with connecting power supplies in parallel and series configuration for CC and CV operation 3 2 OPERATING RANGES All power supplies operate in either constant voltage CV or constant current CC mode over the rated output Their respective voltage and current operating locus figure F are found in operating quadrants for all models The power supply acts as a constant voltage source for comparatively large values of load resistance and as a current source for comparatively small values of load resistance The automatic crossover or transition between these two modes of operations occurs at a critical stage or crossover value of load resistance R E I where E is the front panel voltage setting and I the front panel current setting The followings are the operating quadrants current vs voltage of the power supplies V V Vila V1 High V2 Low is I a I Imax Il High I2 Low PPS 1000 1200 2000 Series PPS 1020 Series Figure G Operating Quadrants 11 3 3 REMOTE SENSE When the supply is locally strapped for local sensing normal operation an unavoidable voltage drop is incu
16. RATING OF FUSE UN za Pd GP IB Use only with a 250V fuse Employer uniquement avec un fuse de 250V A ES 7 A 8 T S 4 S d m S o l QU QA OY NL FUT JX an C NC ID OO NEZ INI Ra N IT V OUTPUT CHANNEL 2 240 Vc MAX OUTPUT CHANNEL 1 240 Vc MAX 4 gt LOAD A 15 Figure I Remote Sense Parallel Mode 3 6 SERIES CONNECTION OPERATION lt NOTE gt Power supplies equipped with SCR crowbars should not be used in series or parallel with each other unless a master slave interconnection is employed and their crowbars interlock Greater output voltage capability can be obtained by connecting output in series A note of caution since current the same in each element of a series circuit both output need identical rated currents If this is not followed excessive current may be forced into one of the output and cause a failure Figure J illustrates the Series configuration on a PPS 1200 series CAUTION NO OPERATOR SERVICEABLE PARTS INSIDE REFER SERVICING TO TRAINED SERVICE PERSONNEL WARNING FOR CONTINUED PROTECTION AGAINST FIRE HAZARD REPLACE ONLY WITH SAME TYPE AND RATING OF FUSE GP IB Use only with a 250V fuse Employer uniquement avec vun fusible de 250V s 4 S gt S F S LOAD Figure J Series Configuration 3 6 1 CV OPERATION In CV operation first program the current of both output to the desired value Secondly program the desired operating voltage to equal the sum of the output
17. RESISTOR Figure N Current Calibration Configuration 6 3 LOCAL CALIBRATION The following steps describe the calibration procedure of the supply via front panel keypads in mode CAUTION In these procedures voltages and currents may exceed full scale value Take all necessary precautions STEPS 1 Disconnect all loads from the supply 2 Strap the supply for local sensing 3 Connect the voltmeter to the S and S rear terminals as in figure M for Voltage calibration 4 Turn on the power supply and press 8 amp ON OFF simultaneously 5 The supply will begin the voltage and current calibration process VOLTAGE CALIBRATION 1 The supply initially sends an offset voltage to the output This offset voltage is measured on the DMM 2 Enter the V Lo value to the power supply by the front panel keys and press ENTER once For example if the DMM reads 4 662 V press L4 ED EJ L3 CJ Dem 3 After calibrating the voltage offset the supply sends full scale voltage to the output This value is measured 34 on the DMM 4 Enter in the V Hi value to the power supply by the front panel keys and press ENTER once For example ifthe full scale is 14 369 V as measured by the DMM press Fe e Je se je ENTERO The voltage calibration is now complete CURRENT CALIBRATION 1 When the voltage calibration is complete connect the voltmeter to the Precision Shunt Resistor as in figure N
18. descriptions is presented in section LCD STAUS ANNUNCIATORS Powers on the unit Negative output terminal Ground output terminal Positive output terminal Negative remote sense Applicable only for the PPS 1000 1020 2000 Series Positive remote sense Applicable only for the PPS 1000 1020 2000 Series Output control key used to display or alter the present voltage setting Numeric entry key for number seven Output control key used to display or alter the present current setting Numeric entry key for number eight Mode control key which activates the tracking mode on or off Applicable only for the PPS 1200 Series Numeric entry key for number nine Used in conjunction with the numeric entry keys to clear partially set commands and returns unit to the metering mode Also returns the supply to Local mode when the unit is operating in the Remote mode Output control key used to display or alter the overvoltage threshold Numeric entry key for number four Mode control key which activates the Overcurrent Protection mode on or off Numeric entry key for number five System control key used to view or alter the GPIB address Addresses available are 0 30 Numeric entry key for number six Mode control key which activates the output on or off When the output is disabled the LCD displays OUTPUT OFF Mode control key which activates the Overvoltage Protection mode on or off Numeric entry key for number one
19. programming 1s to select the power supply s address The present power supply address may be viewed via the front panel address key or in the Default Conditions List To alter this address press the address key select a new address 0 30 and press ENTER key The data is stored in an EEPROM COMMON COMMANDS There is a wide variety of commands available to program the power supply However the commands which pertain to voltage and current are of most use These commands are VSET ISET OVSET VOUT IOUT OVSET and COP Secondary commands of prime importance pertain to the actual programming language Some of these commands are OUTPUT ENTER DELAY SEND PRINT and CLEAR The definitions and uses of these commands are as follows OUTPUT Addresses the power supply to listen and sends command to power supply ENTER Addresses the power supply to talk and receive data from the power supply DELAY Introduces a time delay to the power supply lt NOTE gt This command is extremely important since the power supplies occasionally require time delays in order to execute operations Otherwise error messages occur CLEAR Clears the power supply lt NOTE gt The PPS series does not have a CLR command Therefore the user must initially specify a hardware clear before beginning programming SEND Sends GPIB management commands PRINT Writes data to the screen or to a file 30 All commands may be accepted in either upper or lower
20. the power supply is isolated form earth ground Either output terminal may be grounded or an external source of voltage may be connected between either output and ground However both output terminals must be kept within 240Vdc of ground 47 500Vdc for PPS 1006 PPS 1007 PPS 1206 PPS 2018 and PPS 2019 This includes the output voltage An earth ground terminal is provided on the rear panel terminal block Each of the power supplies will operate accordingly to the various types of loads connected to the output CAPACITANCE LOADING In normal conditions the supply will be stable for almost any size load capacitance for remote sense stability considerations However large load capacitance may cause ringing in the supply s transient response It is even possible that certain combinations of capacitance and ESR equivalent series resistance will result in instability If this is the case the solution is to increase or decrease total load capacitance In addition the overvoltage protection SCR crowbar circuit has been designed to discharge capacitance up to a certain limit These limits are 1 For models of which maximum output voltage is below 18 Volts Capacitance should not exceed 5000uF 13 2 For models of which maximum output voltage is below 35 Volts Capacitance should not exceed 5000uF 3 For models of which maximum output voltage is below 60 Volts Capacitance should not exceed 3000uF 4 For models of which maximum output volt
21. voltages 3 6 2 CC OPERATION In CC operation one output will operate in CV mode the other in CC mode To obtain this operation perform the following 1 Program the output current of the two channels to the desired operating current 2 Program output channel one to one half the desired operating voltage 3 Program output channel two to one half the desired operating voltage At load levels less then one half the total voltage limit the output that was originally in CC mode stays in CC mode 16 At load voltages greater than one half the total voltage limit the output that was originally in CC mode changes to CV mode The secondary output will regulate the current in CC mode and provide the necessary voltage 3 6 3 REMOTE SENSE CONFIGURATION Series Connection Mode The following figure K illustrates the configuration for Remote Sensing in Series Operation 4 CAUTION NO OPERATOR SERVICEABLE PARTS INSIDE REFER SERVICING TO TRAINED SERVICE PERSONNEL WARNING FOR CONTINUED PROTECTION AGAINST FIRE HAZARD REPLACE ONLY WITH SAME TYPE AND RATING OF FUSE GP IB s S 38 8 gt 5 N 7 ANO OUTPUT CHANNEL 2 L ILI 240 Vc MAX N OUTPUT CHANNEL 1 240 Ve MAX x LOAD Figure K Configuration with Remote Sense 3 7 EXTERNAL ANALOG PROGRAMMING PPS 1000 2000 SERIES The voltage and current output of the PPS 1000 2000 can be programmed by an external analog voltage The outputs are linea
22. 0 1 2LSB 0 1 2LSB Current 0 2 5LSB 0 2 5LSB READBACK TEMPERATURE COEFFICIENT Voltage r8mV 100ppm 10mV 200ppm 6mA F mA OUTPUT ISOLATION 240Vdc 240Vdc TEMPERATURE RATINGS HUMIDITY RANGE Operating Storage GPIB INTERFACE CAPABILITY WEIGHT 19 Ibs 19 lbs ImVrms 10mVp p 1mVrms l0mVp p 2mVrms l0mVp p 2 5mVrms 40mVp 3mVrms 40mVp p 1mArms 1mArms 1mArms p 0 2mArms The temperature coefficient is defined as the change in output per degree Celsius after a 30 minute warm up period 100ppm C 100ppm C 100ppm C 100ppm C 200ppm C 200ppm C 200ppm C 200ppm C The drift is defined as the change in output over an eight hour interval under constant line 100ppm C 200ppm C load and ambient temperature after a 30 minute warm up period 0 01 1mV 0 01 1mV 0 01 6mV 0 01 10mV 0 1 20mA 0 1 10mA 0 1 2mA 0 1 1mA The time required for the output voltage to recover within a band of 0 1 of rated voltage 0 01 20mV 0 1 0 5mA around the nominal voltage within a 50 variation in load current 50us 50us 50us 50us 50us The total programming UP DOWN time is the sum of output voltage response time and the programming command processing time LSB is the maximum time for the output voltage to vary within 0 025 of a final value UP and DOWN times are the maximum times for the 10 to 90 or to 10 of its total excursion value 15ms 20ms 30ms 40ms 50ms 70ms 250ms 400ms 20ms 30ms 80ms 100ms 3ms 5ms 20ms 30ms
23. 1 3V 2 4 1 3V 2 4 0 3V 2 4 0 6V 2 4 2 5V 2 4 5V 24 10V EXTERNAL ANALOG PROGRAMMING GAIN Voltage 3V V 2 5V V 3 5V V 6V V 12V V 25V V Current 0 6A V 0 8A V 0 SA V 0 3 0 5A V 0 15 0 2A V 0 08 0 1A V EXTERNAL ANALOG PROGRAMMING ACCURACY Voltage 0 1 20mV 0 1 20mV 0 1 4mV 0 1 10mV 0 1 40mV 0 1 80mV 0 1 160mV Current 0 1 12mA 0 1 12mA 0 1 40mA 0 1 20mA 0 1 6 12mA 0 1 3mA 0 1 1 5mA LOAD EFFECT Load effect is defined as the maximum change in output due to a load change up to the maximum voltage or current rating Voltage 0 001 1mV 0 001 1mV 0 001 1mV 0 001 1mV 0 001 1mV 0 001 1mV 0 001 1mV Current 1mA 1mA 1mA 1mA 1mA 1mA 1mA Remote sense operation is possible with up to 0 5V drop for positive and negative output load leads 49 Specifications are subject to change without notice SPECIFICATION continued PPS 2015 PPS 2016 PPS 2017 A PPS 2018 A PPS 2019 A Maximum output change for a line voltage change within rating 1mV 1mV 1mV 1mA 1mA 1mA 0 1mA PARD PERIODIC AND RANDOM DEVIATION AND NOISE RMS PK PK 20Hz 20MHz with output ungrounded 1mVrms lO0mVp p 1mVrms 10mVp p 1mArms TEMPERATURE COEFFICIENT 100ppm C Current 200ppm C DRIFT STABILITY 100ppm C 200ppm C Voltage 0 01 3mV Current 0 1 6mA 8mA LOAD TRANSIENT RESPONSE 0 01 3mV 0 1 6mA Voltage Recovery Time 50us PROGRAMMING UP DOWN SPEED 3ms 5ms 20ms 30ms 3ms 5ms 20ms 30ms READBACK ACCURACY
24. 2 0 ISETI 0 0140 ISET2 0 0140 OVSETI maximum OVEST2 maximum ADDRESS 12 12 12 12 5 5 1 OUTPUT ON OFF All power supplies have their outputs off upon powering up The command OUT is to enable disable the outputs To enable the power supply designate the channel PPS 1200 series only and condition 1 on 0 off For example to disable an output Enter OUTO To view if an output is on or off query the status of the power supply 5 5 2 VOLTAGE PROGRAMMING To program a voltage specify an output channel PPS 1200 series only and voltage lt NOTE gt The default output condition of a power supply is OFF at startup All values of voltage must be in volts i e no millivolts This operation hold true for voltage settings in CV mode Thus actual voltage is the programmed voltage and the programmed current is the current limit In addition the specified voltage value will be rounded off to the nearest multiple of resolution For example to program a channel for 16 volts Enter VSET 16 To readback the programmed value send the query VEST and address the power supply to talk To read back the voltage output of the channel send the query VOUT Once again the power supply should be addressed to talk and the results displayed i e shown on CRT printed or saved The PPS 1200 series have two outputs please refer to the programming syntax commands for proper nomenclature of commands 5 5 3 OV
25. 4 x5 2 x15 7 for all models Specifications are subject to change without notice 46 SPECIFICATION continued MODEL PPS 1201GSM PPS 1201GSM A PPS 1202GSM AC Input One internal switch permits operation of 115 or 230 240 Vac line voltage Input Current Low Range 3mA to 3mA 115VAC 1 35A 1 35A 2 7A 230VAC 0 7A 0 7A 1 35A Fuse Rating AC input is protected by a rear panel mounted fuse 115VAC 2 5A 2 5A 5A 230VAC 1 25A 1 25A 2 5A Amplitude 115 Vac or 230 Vac 10 115 Vac or 230 Vac 10 115 Vac or 230 Vac 10 Frequency 50 to 60 Hz 50 to 60 Hz 50 to 60 Hz Maximum VA 160V A 160VA 315VA Maximum Power 125W 125W 240W Peak Inrush Current 20A 20A 30A DC Output Programming Range Voltage 0 8V 0 8V 0 20V Current 0 3A 0 3A 0 4A Sink Current 0 to 3A 0 to 3A 0 to 4A DC Output Measurement Range Voltage 0 to 8V 0 to 8V 0 to 20V Current 3A to 3A High Range 3A to 3A 4A to 4A Programming Resolution LSB Voltage Current Voltage and current programming are monotonic over full temperature range 2mV 1mA 2mV 1mA 10mV 2mA Programming Accuracy Voltage Current If the unit is recalibrated at a temperature other than 25 C the specifications apply over a temperature band of 5 C around calibration temperature 0 05 2LSB 0 15 SLSB 0 05 2LSB 0 15 SLSB 0 05 2LSB 0 15 5LSB Sink Current Tracking 0 3 10LSB 0 3 10LSB
26. 5VAC 4A 4A 230VAC 2A 2A Amplitude 115 120Vac or 230 240Vac 10 115 120Vac or 230 240Vac 10 Frequency 50 to 60 Hz 50 to 60 Hz Maximum VA 221VA 221VA Maximum Power 192W 192W Peak Inrush Current 30A 30A DC OUTPUT MAXIMUM RATINGS Voltage 0 17 5V 0 35V 0 30V 0 60V Current 0 6A 0 3A 0 3A 0 1 5A DC OUTPUT PROGRAMMING RANGE Voltage 0 17 5V 0 35V 0 30V 0 60V Current 0 6A 0 3A 0 3A 0 1 5A PROGRAMMING RESOLUTION LSB Voltage and current programming are monatomic over full temperature range Voltage 10mV 20mV Current 2mA 1mA OVP 200mV 400mV PROGRAMMING ACCURACY If the unit is recalibrated at a temperature other than 25 C these specifications apply over a temperature band of 5 C around calibration temperature Voltage 0 05 2 LSB 0 05 2 LSB Current 0 15 5 LSB 0 15 5 LSB OVP 2 4 0 3V 2 4 1 3V LOAD EFFECT Load effect is defined as the maximum change in output due to a load change up to the maximum voltage or current rating Voltage 0 001 1mV 0 001 1mV Current 1mA 1mA Remote sense operation is possible with up to 0 5V drop for positive and negative output load leads Specifications are subject to change without notice 43 SPECIFICATION continued PPS 1021 PPS 1022 Maximum output change for a line voltage change within rating 1mV 1mV 1mA 1mA PARD PERIODIC AND RANDOM DEVIATION AND NOISE RMS PK PK 20Hz 20Mhz with output ungrounded LOAD TRANSIENT RESPONSE Recovery Time
27. ERVOLTAGE PROGRAMMING OVSET 28 In order to protect loads against excessive voltages an overvoltage protection circuit SCR crowbar has been added When a voltage exceeds the set overvoltage value the power supply output is disabled To program overvoltage specify the output channel PPS 1200 series only and overvoltage value For example to program one channel of the PPS 1203 for 18V Enter OVSETI 18 To readback the programmed value for channel one send the query OVSET1 and address the power supply to talk When specifying the queries only one command may be issued at a time The power supply can access only one query at a time 5 5 4 CURRENT PROGRAMMING To program a current specify an output channel only PPS 1200 series and current All values of current must be in amps Additionally the unit rounds off ISET to the nearest multiple of resolution For example to specify a current of 1 6 amps Enter ISET 1 6 This operation holds true for current settings in CC mode When the supply operates in CC mode the actual current is the programmed current and programmed voltage is the voltage limit To readback the programmed value send the query ISET and address the power supply to talk To readback the current output of the channel send the query IOUT Once again the power supply should be addressed to talk and the results displayed i e shown on CRT printed or saved The PPS 1200 series have two outputs p
28. ET lower than the outside circuit or charging circuit and ISET to the desirable current The higher outside voltage starts to take control of the current flow and it will sink current If the current exceed the constant current setting the current will be limited at the ISET The negative current reading means that it is now sinking power Load or d PPS1201GSM Charging Higher Voltage Circuit CHI CH2 Operation difference from the PPS 1201GSM 18 Basically the operation of PPS 1201 and the PPS 1201GSM is very similar Only the OVSET is disabled for PPS 1201GSM Other operation such as the negative current reading on LCD and in GPIB is featured in PPS 1201GSM FOUR LOCAL OPERATION 4 1 INTRODUCTION These sections contain information on how to locally program the PPS Series Upon power up the power supplies default to local mode operation All front panel keys may be used to control the power supply lt NOTES gt The PPS series power supply models and their operations are essentially identical However two of the supplies provide more functions i e PPS 1200 series has dual output and PPS 1020 series has two output operating ranges which may slightly alter or add to programming procedures Therefore please refer to the appropriate sections for these operation The PPS 1000 2000 series are identical in operation However their output differ All operations performed in local mode may also be performed in remote mode T
29. IGNAL ics tecto teet etn pete e adde Uto e iR te evene 22 IU O 23 INTRODUCTION pop ERE 23 GPIB OPERATION seo itti nere rp e Ox Er b er ue e irn e ie re 24 GPIB INTERFACE FUNCTIONS 3 teret ea a tre ser eb para 24 ADDRESS SETTING OF GPIB INTERFACE eene meer 24 PROGRAMMING SYNTAX citet een eier in eins 25 GPIB DEVICE COMMANDS LIST seesserseesnersersnnrsonsannsnnonnsnnsennsennernnesnonsnonsnensonnnssannenn 25 CALIBRATION COMMANDS esses nennen eene en nee et eene ener tree aasi trenes 26 STATUS REPORTING rtt oto HR Rn ERIT E 26 PROGRAMMING THE POWER SUPPLY eee eene nne nrennenrenne eren 27 OUTPUT ON OEF 3 Hus tie e dt e e epe f eee 28 VOLTAGE PROGRAMMINGQG iie ert re e ES e RE HS Nen e peine RAS 28 OVERVOLTAGE PROGRAMMING OVSET esesseeseeeeeeeeeee nennen eene eene 28 CURRENT PROGRAMMING cuina i 29 OVERCURRENT PROTECTION OCP sscsssessesssesseessesseeseeeseeesecesecesecaecaecsaecsaeeseeeseeenees 29 TRACK COMMAND aesti nO e e REC Ere bee ret d Hb cr ee aeree 30 FUNDAMENTALS OF PROGRAMMING siningid gea O eene ene nen nnne REEN enne 30 UOn 33 INTRODUCTION E42 2 2 o HERE A A A RETE RERUMS 33 CALIBRATION CONFIGURATION eene nennen enne nre nennen a e 33 LOCAL CALIBRATION ettet hr Hein t bee E nes 34 REMOTE CALIBRATION diete eoa dee ete tet oce a ie t ehe 35 CALIBRATION P
30. Motech Industries Inc for repair or calibration To receive service under this warranty you must include proof of purchase including date and place of purchase a copy of your purchase receipt or we will not be responsible for repairs or replacement of the unit under warranty Motech Industries Inc assumes no responsibility for shipping and handling However repaired units will be shipped back to the customer with return shipping charges paid by Motech Industries Inc Any applicable implied warranties including warranties of merchantability and fitness for a particular use are hereby limited to two years from the date of purchase Consequential or incidental damages resulting from loss of use or from a breach of any applicable express or implied warranties are hereby excluded 37 NON WARRANTY SERVICE Any Motech Industries Inc out of warranty instrument that is thought to be defective but is repairable may be sent in for non warranty service Please contact our service department for current repair charges The instrument should be returned to Motech Industries Inc Please follow the directions under the heading Shipping Instructions in this section 7 4 SHIPPING INSTRUCTIONS Any product returned to Motech Industries Inc for service must be shipped freight prepaid we will not accept COD shipments Motech Industries Inc 6 floor No 59 Tsao Dih Woei Wan Shun Liao Shen Keng Hsiang Taipei Hsien Taiwan The ins
31. NTRODUCTION This addendum describes calibration procedures for the AMREL Programmable DC Power Supply The supply is calibrated either through local or remote control The following information provides calibration procedures in local mode NO hardware adjustment is necessary since all calibration is accomplished by software The software sends calibration constants to the supply via the front panel keys Calibration should be performed at least annually The four parameters that must be calibrated are output voltage output current readback voltage and readback current After all the power supply parameters are calibrated the supply returns to normal operating condition If there are any errors in the calibration cycle the power and recalibrate All constants are saved in a non volatile EEPROM 6 2 CALIBRATION CONFIGURATION There are two configurations for calibration of power supplies One of which would be for voltage and the second for current The two pieces of equipment necessary for calibration are l precision Shunt Resistor 0 1 ohm 10 Amp 0 001 accuracy for smaller current or 0 05 accuracy for larger current 20ppm 10 watts 2 DMM DC voltage and current 5 digit 0 00596 accuracy DVM REAR OUTPUT TERMINA E 4 S 00 tT Figure M Voltage Calibration Configuration 33 DVM REAR OUTPUT TERMINAL S z S oo toto PRECISION lt lt lt SHUNT
32. PROGRAMMING UP DOWN SPEED READBACK ACCURACY Voltage Current 1mVrms 10mVp p 1mVrms 10mVp p 1mArms 1mArms The temperature coefficient is defined as the change in output per degree Celsius after a 30 minute warm up period 100ppm C 100ppm C 200ppm C 200ppm C The drift is defined as the change in output over an eight hour internal under constant line load and ambient temperature after a 30 minute warm up period 0 01 ImV 0 01 3mV 0 1 3mA High 0 1 6mA Low 0 1 2mA High 0 1 3mA Low The time required for the output voltage to recover within a band of 0 1 of rated voltage around the nominal voltage within a 50 variation in load current 50us 50us The total programming UP DOWN time is the sum of output voltage response time and the programming command processing time LSB is the maximum time for the output voltage to vary within 0 025 of a final value UP and DOWN times are the maximum times for the 10 to 90 or to 10 of its total excursion value 3ms 5ms 10ms 15ms 20ms 30ms 20ms 30ms 10mV 20mV 1mA High 2mA Low 0 5mA High ImA Low If the unit is recalibrated at a temperature other 25 C these specifications apply over a temperature band of 5 C around calibration temperature 0 1 2LSB 0 1 2LSB 0 2 5LSB 0 2 5LSB READBACK TEMPERATURE COEFFICIENT Voltage Current OUTPUT ISOLATION TEMPERATURE RATINGS HUMIDITY RANGE GPIB INTERFACE CAPABILITY WEIGHT The readback temperature coe
33. ROGRAM EXAMBLE 1 eene eene enn nn eren n nrenne trennen nennen 35 USER MAINTENANCE SERYV ICE ee eeee eene eene tn tnnt tnn nt ts tasses tatus ets tn snae ss tasse tete cronos 36 7 1 FUSE IA AS E NS 36 7 2 IN CASE OEDIBEICUIEIES t ERIRHEING Rn nn meet 36 7 3 WARRANTY INFORMATION eee nene enne eet nn en a en ense ee eser nete n ente ness etna nena 37 7 4 SHIPPINGINS FRUCTIONS tec iia eee ttov Qe e d ele Slots 38 EIGHT APPENDICES osit 39 A SPECIFICATION CONTINUED Dieron p a ete a aditu tb 39 B COMMAND SUMMARIES ooooccccnononcnononcccnnnnncnonnnnncnnonnanonnnnnnnonnnnnronnnnnnrrnnn nn esee enses eere entere e ee ness serene 51 C QUERY MESSAGES eren retener tete i eie e ER rete E dades 53 D CALIBRATION PROGRAM EXAMPLE cita 54 NINE SAFETY PRECAUTIONS ussessessssesnennenennenesnennenesnennenesnennenesnennenennennenesnennenennennenesnennenesnennenesnennenennene 55 ONE INTRODUCTION Congratulations You have just purchased one of the most advanced professional Programmable Power Supplies available The innovative ergonomic design and overall high quality will provide years of reliable operation Therefore it is very important to completely familiarize yourself with the unit before attempting use Please read this manual carefully paying particular attention to the Warning and Caution sections 1 1 DESCRIPTION The Programmable Power Supply Series
34. TABLE OF CONTENTS ONE INTRODUCTION sussessessesesnennenesnennenesnennenennennenennennenennennenesnennenennennenennenennennesennennenesnennennssesnesassesnenane 1 1 1 DESCRIPTION es E ERRORI RO PROS TTE aa ada 1 1 2 INSPECTION e EE 1 1 3 INCEUDED ITEMS perunaa e ti o rai ida datada 1 1 4 CAUTIONS AND WARNINGS eto tette eoe epit aps tert to eta ee eterne 1 1 5 LOCATION AND COOLING 222er RER e iret pre les 2 1 6 GPIBINTERFACE CONNECTOR irenste digan ne m ER nn A 2 TWO GETTING STARTED ccccsssssssssrsersessrcessessrsessessrsessessrsessesensesscssnsessesensessesensessccessesensessscscseneesecsenees 3 2 1 UNITEAMIGIARIZATION iii 22 8 Rp desta ee ad 3 2 1 1 FRONEPANEL KEYS iau REC Ute es 5 2 1 2 RFAR PANEL eio ii RR tenen 8 2 2 LED STATUS ANNUNGTATORS itr ER Ee TREO RERO elle 8 2 3 OUTPUT TERMINALS AND WIRES esee eene en enne nnne nre nne eren 10 THREE OPERATING CHARACTERISITCS AND CONFIGURATIONS sussesnesnesesnennenesnennenesnennenennene 11 3 1 INTRODUCTION 8 itecto retten RE 22228530 RER E N idt Re ee ia crac 11 3 2 OPERATING RANGES ott rte t tr iy bem a mn be n re ie E ts 11 3 3 REMOTESENSE 5 mn eo te e dta e D dide im deus 12 3 3 1 REMOTE SENSE CONFIGURATION sese een eene emet nene tenerent teens 12 3 372 REMOTE SENSE CHARACTERISTICS cirein aen ennt tnnt entente eterne 12 3 4 LOAD CONSIDERATION AND MULTIPLE LOADS CONNECTION ee 13 3 5 PARALLEL CONNECTION OPERATION
35. TION NO OPERATOR SERVICEABLE PARTS INSIDE REFER SERVICING TO TRAINED SERVICE PERSONNEL WARNING FOR CONTINUED PROTECTION AGAINST FIRE HAZARD REPLACE ONLY WITH SAME TYPE AND RATING OF FUSE and vi are independent grounds and must be disconnected Vp Vv NC Ip VI S 6 5 INPUT OUTPUT EXTERNAL PROGRAMMING Figure L Rear Panel of PPS 1000 2000 series PPS 1201GSM Programmable Power Supply Current Sink Operation The PPS 1201GSM Programmable Power Supply comes with current source and sink capability This allows it simulates a chargeable battery The current flow of the chargeable battery is bi directional When the battery is discharging the current flows from the battery current output When the battery is charging the current flows into the battery current input Current Output Source Operation To simulate a battery discharge set the VSET than the outside circuit or charging circuit and set the ISET to the desirable current The higher voltage setting dominates the circuit s current flow and start to output power from PPS 1201GSM The positive current reading means that it is outputting power now If the current exceed the constant current setting the current will be limited at the ISET Load or PPSI201GSM Charging Higher Voltage Circuit CH1 CH2 Current Input Sink Operation The chargeable battery is not only supplying power but also sinking power To simulate a battery charging set the VS
36. UT 4 LOAD Figure G Remote Sense Configuration 3 3 2 REMOTE SENSE CHARACTERISTICS OUTPUT NOISE Any noise picked up on the sense leads will appear at the supply s output and may adversely affect CV load regulation Twist the sense leads to minimize external noise pickup and run then parallel and close to the load leads In noisy environments it may be necessary to shield the sense leads Ground the shield at the power 12 supply end only Do not use the shield as one of the sensing conductors STABILITY When the supply is connected for remote sensing it is possible for the impedance of the load wires and the capacitance of the load to form a filter which will become part of the supply s CV feedback loop The extra phase shift created by this filter can degrade the supply s stability and can result in poor transient response performance In extreme cases it can cause oscillation It is difficult to state simple rules defining the conditions under which this can occur and which corrective action to take A certain amount of trial and error may be called for Two guidelines which are almost always valid are a Keep the leads short as possible b Twist the load leads together to minimize inductance In most circumstances once these two guidelines are followed problems associated with the load lead inductance are eliminated This leaves the load lead resistance and load capacitance as the major cause of the reduced stability In t
37. V 0 001 1mV 0 001 1mV 0 001 1mV 1mA 1mA 1mA 1mA 1mA 0 1mA Remote sense operation is possible with up to 0 5V drop for positive and negative output load leads Specifications are subject to change without notice 39 SPECIFICATION continued MODEL PPS 1007 PPS 1008 PPS 1008A AC INPUT One internal switch permits operation of 115 or 230240 Vac line voltage Input Current 115VAC 1 2A 0 5A 0 5A 230VAC 0 6A 0 25A 0 25A Fuse Rating AC input is protected by a rear panel mounted fuse 115VAC 2 5A 2 5A 2 5A 230VAC 1 25A 1 25A 1 25A Amplitude 115 120 Vac or230 240 Vac 10 115 120 Vac or 230 240 Vac 10 Frequency 50 to 60 Hz 50 to 60 Hz Maximum VA 152VA 58VA 35VA Maximum Power 120W 47W 28W Peak Inrush Current 18A 15A 13A DC OUTPUT MAXIMUM RATINGS Voltage 250V 35V 35V Current 0 2A 0 35A 35mA DC OUTPUT PROGRAMMING RANGE Voltage 0 250V 0 35V 0 35V Current 0 0 2A 0 0 35A 0 35mA PROGRAMMING RESOLUTION LSB Voltage and current programming are monotonic over full temperature range Voltage 80mV 10mV 10mV Current 0 1mA 0 1mA 10uA OVP 1 6V 200mV 200mV PROGRAMMING ACCURACY If the unit is recalibrated at a temperature other than 25 C these specifications apply over a temperature band of 5 C around calibration temperature Voltage 0 05 2LSB 0 05 2LSB 0 05 2LSB Current 0 15 5LSB 0 15 5LSB 0 15 5LSB OVP 2 4 10V 2 4 1 3V 2 4 1 3V EXTERNAL ANALOG PROGRAMMING GAIN Vol
38. age is below 128 Volts Capacitance should not exceed 470uF 5 For models of which maximum output voltage is below 250 Volts Capacitance should not exceed 220uF lt NOTE gt If load capacitance approaches these limits it is recommended to not intentionally activate the OVP circuit and discharge the capacitance through the SCR crowbar as part of standard testing procedure 3 5 PARALLEL CONNECTION OPERATION lt NOTE gt Power supplies equipped with SCR crowbars should not be used in series or parallel with each other unless a master slave interconnection is employed and their crowbars interlock Greater current capability can be achieved by connecting output in parallel However only power supplies which have equivalent voltage and current output ratings may be connected in parallel Otherwise damage to the unit may result A typical connection is shown in figure H through the back of PPS 1200 series in local sensing All leads are kept as short as possible and are bundled together Second connect remote sense terminals to compensate for the voltage drop in the interconnecting load leads Lastly the CV and CC operations have identical setups CAUTION NO OPERATOR SERVICEABLE PARTS INSIDE REFER SERVICING TO TRAINED SERVICE PERSONNEL Pi TYPE AND RATING OF FUSE GP IB Ed FS A ia s a oureurchanwL2 LI 2a0vemax ZEA outpurchaneril 240 Ve MAX O Figure H Parallel Configuration 3 5 1 CV OPERATION Although both output
39. arrow in CHANNEL 2 bit 9 0 CH2 OUTPUT OFF 1 CH2 OUTPUT ON bit 10 0 CH2 OCP ON 1 CH2 OCP OFF bit 11 0 CH2 OC NOT OCCUR 1 CH2 OC OCCUR bit 12 0 CH2 OV NOT OCCUR 1 CH2 OV OCCUR bit 13 0 CH2 CV MODE 1 CH2 CC MODE 53 bit 14 0 independent 1 TRACKING TO CHANNEL 1 bit 15 reserved D Calibration Program Example The following is a software calibration program written in QBASIC for an one channel PROGRAMMABLE DC POWER SUPPLY The equipment necessary to calibrated the unit included a PPS 1004 relay control a FLUKE 8842A digital multimeter GPIB interface and a controller card from National Instruments AT GPIB A shunt resistor used for local calibration may be utilized in remote calibration program and variable declaration DECLARE SUB DELAY SECONDS MULTIPLIER 10 dmm 20 CH program initialization RANDOMIZE TIMER OPEN gpib0 FOR OUTPUT AS 1 OPEN gpib0 FOR INPUT AS 2 PRINT 1 ABORT PRINT 1 REMOTE PRINT 1 clear PRINT 1 output dmm PRINT 1 OUTPUT1 OUTO VEST 6 ISET 0 125 CLS INPUT Enter GPIB address of PPS unit under test default 12 pps IF VAL pps 0 OR VAL pps gt 31 OR pps THEN pps 12 PRINT 1 output pps model PRINT 1 enter pps INPUT 2 model PRINT print model found at GPIB address pps PRINT DO INPUT Enter channel for calibration testing 1 2 gt CH LOOP UNTIL CH 1
40. ation in load current Recover Time lt 50us lt 50us lt 50us Programming UP DOWN Speed The total programming UP DOWN time is the sum of output voltage response time and the programming command processing time LSB is the maximum time for the output voltage to vary within 0 025 of a final value UP and DOWN times are the maximum time for the 10 to 90 or to 10 of its total excursion value Tup Tdn lms 2ms lms 2ms lms 2ms LSB Sms 10ms Sms 10ms Sms 10ms READBACK Resolution Voltage 2mV 2mV 10mV Current 1mA High Range 1mA 2mA Low Range IA READBACK Accuracy If the unit is recalibrated at a temperature other 25 C these specifications apply over a temperature band of 5 C around calibration temperature Voltage 0 1 2LSB 0 1 2LSB 0 1 2LSB Current 0 2 SLSB 0 2 5LSB 0 2 5LSB READBACK Temperature Coefficient The readback temperature coefficient is defined as the variation in reading per degree Celsius after a 30 minute warm up Voltage 100ppm 4mV 100ppm 4mV 100ppm 4mV Current 200ppm 4mA 200ppm 4mA 200ppm 4mA Output Isolation Neither output terminal may be more than 240Vdc from chassis ground 240Vdc 240Vdc 240Vdc Temperature Ratings Humidity Range Operating 0 C to 40 C 30 to 80 RH Storage 20 C to 70 C 20 to 80 RH GPIB Interface Capability Weight 16 lbs 16 Ibs 20 Ibs Dimensions 8 4 x5 2 x15 7 for all models Specifications are subject to change wit
41. case letters in ASCII code The PPS series accepts integer or numeric data as input Plus and minus signs are also numeric characters Remember not to program too large a value since the power supply rounds off data to suit the power supplies resolution SENDING DATA The steps involved in sending data to the power supply are setting the address power supply amp computer function and sending the command QBasic For example to turn on the output of a power supply single output send PRINT 1 OUTPUT 12 out 1 where PRINT QBasic command Writes data to the screen or to a file 1 File number OUTPUT QBasic command Specifies that the file is opened for sequential output 12 GPIB device address OUT GPIB command 1 Enable output 0 disables output Continuing on with this example we will set the output voltage to 11V and output current to 1 7 amps therefore send PRINT 1 OUTPUT 12 out 11 PRINT 1 OUTPUT 12 out 1 7 lt NOTE gt The voltage and current values are given in volts and amps OBTAINING DATA The steps involved in obtaining data from the power supply follow a similar formats as in sending data However additional commands Enter and Print are necessary to view the data For example to query the programmed voltage of the previous example send PRINT 1 OUTPUT 12 VSET Although a query has been sent to the power supply there has been no command given to view the data At this moment the power
42. e the condition This feature can also be disable or enabled by pressing the BEEP key 22 FIVE LOCAL OPERATION The programmable Power Supply Series from American Reliance compatible with ANSVIEEE 488 1 This is the Standard Digital Interface for Programmable Instrumentation This standard provides a means for an electrical mechanical system to interconnect measurement devices Several key specifications of IEEE 488 1 are e Interconnect Devices e Interconnection Path e Signal Lines management e Message Transfer Scheme e Maximum Data Rate e Address Capability e Pass Control e Interface Circuits 5 1 INTRODUCTION Up to 15 devices on one bus The total transmission path for a star or linear bused networks is up to 20 meters Sixteen active lines 8 data lines and 8 interface and communication lines Byte serial bit parallel asynchronous data transfer using interlocking three wire handshake technique One megabyte per second over limited distances Typical transmission rate is 250 kilobytes per second The actual data transmission rate is usually determined by the slowest device in communication at that time There can be a maximum of one talker and up to 14 listeners at one time If a system has more than one controller only one controller may be active at a time The active controller may pass control to one of the other passive controllers Only the controller designated as system controlle
43. e PPS 1200 series are 0 disable calibration 1 calibrate channel one 2 calibrate channel two 3 calibrate both channels 4 gt Command available to the model 5 4 STATUS REPORTING All models of the PPS series include a status register for reporting the operating conditions of the power supply Each output channel has an 8 bit register which signifies a true condition as 1 and a false condition as 0 There bit conditions stay true as long as the condition is true The status word received is in ASCII code format and needs to be converted to binary code Each bit is assigned a particular condition and one nibble is converted to one ASCII code The single channel PPS send two ASCII Bytes and two Terminator Bytes to the GPIB The terminator bytes are line feed amp carriage return The deal channel PPS send four bytes of ASCII and two terminator bytes to the GPIB STATUS DEFINITION OF STATUS WORD NIBBLE 1 NIBBLE 1 BEEP OFF HIGH RNG CV MODE OCP OFF OUT ON No Error BEEP OFF LOW RNG CC MODE OCP ON OUT OFF CV2 MODE OCP OFF OUT ON TRACK CC2 MODE OCP ON OUT OFF NIBBLE 3 NIBBLE 4 lt NOTE gt 26 Byte 0 is available for all PPS models However byte 1 is only applicable for the dual channel models An explanation of these bytes bits is as follows bit 7 Byte 0 Audible indictor is off 0 or on 1 b6 Byte 0 Signifies the high range 0 or low range 1 Applicable to the PPS 1020 series
44. e output Voltage Current amp mode status There are no status indicators for CV mode These messages are viewed in either local or remote mode Channel 1 is operating under constant current mode When the indicator is off the supply is operating in constant voltage mode Channel 2 is operating under constant current mode When the indicator is off the supply is operating in constant voltage mode Applicable only for the PPS1200 series The supply is operating in remote mode The supply is operating in tracking mode Applicable only for the PPS1200 series Overcurrent protection on channel 1 is enabled When blinking the overcurrent circuit has been activated and disabled the output Overcurrent protection on channel 2 is enabled When blinking the overcurrent circuit has been activated and disabled the output Applicable only for the PPS1200 series Overcurrent protection on channel 1 is enabled When blinking the overcurrent circuit has been activated and disabled the output Overcurrent protection on channel 2 is enabled When blinking the overcurrent circuit has been activated and disabled the output Applicable only for the PPS1200 series 9 INPUT ERROR The numeric value entered is out of range Applies to all models 10 High or Low The supply is operating in either the high or low range Applicable only to the PPS 1020 series 2 3 OUTPUT TERMINALS AND WIRES All models have terminal blocks on the r
45. ear panel which include positive and negative outputs positive and negative remote sense outputs and earth ground lt NOTE gt The power supply is set at the factory local sense operation i e the S and S terminals are strapped to the and terminals by a shorting plate at the rear terminal block When operating in remote sense mode remove the shorting plate and refer to section 3 3 for remote sense operation Additionally all models have positive negative and earth ground terminals in the front of the unit Remote sense capability is discussed detail in section 3 3 A brief definition of remote sense is a measurement of voltage at the load rather than at the output terminals Local connections are made to the and terminals of the power supply Terminated loads only wrap and bundle wires to reduce coupling effect In order to safely and sufficiently handle electric current the proper wire size must be selected Select a wire size with sufficient rating to carry the current without overheating Other factors to be taken into consideration are voltage drop and conductor temperature The following table lists current carrying capacity of various wire sizes For further information please refer to the NEC 1987 Handbook TABLE 1 Stranded Copper wire Ampacity and Resistivity Ampacity Per Wire Amps Wire Size 2 Wire Bundle 4 Wire Bundle Resistivity AWG Amps Amps Ohm ft 10 THREE
46. ernately viewed via the CH SELECT key In order to program the output parameters for each output channel first toggle the CH SELECT key to the desired channel and then observe the following guidelines 4 3 SETTING VOLTAGE To locally program the voltage VSET press VSET enter the value and press ENTER For example if one wished to set a voltage of 3 99 press VSET UTILITY Let Lo Let Lo am 19 the LCD display 3 99 and the unit returns to metering mode A VSET description For all models VSET can be altered by pressing A or Y key instead of VSET and entry keys When the power supply is in the CV mode pressing A key will increase output voltage per step The increment step is determined by either pressing the or 3 key until the cursor comes to the digit to be varied The LCD module would show the following cursor OCP 17 30 00V 0 000A RMT OVP The operation of Y key is similar to A key for decreasing the output when power supply is in CV mode 4 4 SETTING CURRENT To locally program the current ISET press ISET and enter the value and then press ENTER For example if one wishes to set a current of 1 69 amps press ISET UTILITY fe al Le Lo Le lem the LCD displays 1 69 and the unit returns to metering mode For all models ISET can be altered by pressing
47. erwise stated All specifications apply over the full operating temperature range of 0 C to 50 C unless otherwise specified MODEL PPS 1001 PPS 1002 PPS 1003 PPS 1004 PPS 1005 PPS 1006 Input Current AC input is protected by a rear panel mounted fuse 4A 2 5A 2 5A 2A 1 25A 1 25A 115 120 Vac or 230 240 Vac 10 Frequency 50 to 60Hz Maximum VA 258VA 173VA 173VA 173VA 152VA 152VA Maximum Power 208W 141W 141W 141W 120W 120W Peak Inrush Current 60A 20A 20A 20A 18A 18A DC OUTPUT MAXIMUM RATINGS 8V 10A 0 8V 0 10A PROGRAMMING RESOLUTION LSB Voltage and current programming are monotonic over full temperature range 2mV 5mV 10mV 10mV 20mV 4mA 2mA 1mA 0 6mA 0 4mA 50mV 100mV 200mV 200mV 400mV PROGRAMMING ACCURACY If the unit is recalibrated at a temperature other than 25 C these specifications apply over a temperature band of 5C around calibration temperature 0 05 2LSB 0 05 2LSB 0 05 2LSB 0 05 2LSB 0 05 2LSB 0 05 2LSB 0 15 5LSB 0 15 5LSB 0 15 5LSB 0 15 5LSB 0 15 5LSB 0 15 5LSB 2 4 0 3 2 4 0 6V 2 4 1 3V 2 4 1 3V 2 4 2 5V 2 4 5V EXTERNAL ANALOG PROGRAMMING GAIN 0 8V V 1 8V V 12 8V V 1A V 0 4A V 0 05A V EXTERNAL ANALOG PROGRAMMING ACCURACY 0 1 4mV 0 1 10mV 0 1 20mV 0 1 20mV 0 1 40mV 0 1 80mV 0 1 12mA 0 1 6mA 0 1 3mA 0 1 3mA 0 1 1mA 0 1 0 5mA Load effect is defined as the maximum change in output due to a load change up to the maximum voltage or current rating 0 001 1mV 0 001 1mV 0 001 1m
48. fficient is defined as the variation in reading per degree Celsius after a 30 minute warm up 100ppm 10mV 100ppm 20mV 200ppm 4mA 200ppm 2mA Neither output terminal may be more than 240Vdc from chassis ground 240Vdc 240Vdc Operating 0 C to 40 C 30 to 80 RH Storage 20 Cto 70 C 20 to 80 RH SH1 AH1 T6 TEO L4 LEO RL1 SRO PP0 DC1 DTO CO E1 18 lbs DIMENSIONS 8 4 x5 2 x15 7 for all models Specifications are subject to change without notice 44 SPECIFICATION continued PPS 1201 PPS 1202 PPS 1203 PPS 1204 PPS 1205 PPS 1206 One internal switch permits operation of 115 or 230 240 Vac line voltage Input Current AC input is protected by a rear panel mounted fuse 4A 4A 5A 4A 2A 2A 2A 2 5A 2A 2A Maximum VA 315VA 315VA 299VA 343VA 299VA 299VA Maximum Power 240W 240W 232W 268W 232W 232W Peak Inrush Current 30A 30A 30A 60A 30A 30A DC OUTPUT MAXIMUM RATINGS 8V 6A 0 8V Voltage and current programming are monotonic over full temperature range 2mV 10mV 10mV 20mV 2mA f 0 6mA 0 4mA 400mV PROGRAMMING ACCURACY If the unit is recalibrated at a temperature other than 25 C the specifications apply over a temperature band of 5 C around calibration temperature 0 05 2LSB 0 05 2LSB 0 05 2LSB 0 05 2LSB 0 05 2LSB 0 05 2LSB 0 15 5LSB 0 15 5LSB 0 15 5LSB 0 15 5LSB 0 15 5LSB 0 15 5LSB 2 4 0 3V 2 4 0 6V 2 4 1 3V 2 4 1 3V 2 4 2 5V 2 4 5V Load effect is defined as the maximum change in output d
49. from Motech Industries Inc offers a complete solution to power supply system requirements These models are indispensable instruments in assisting in the development and testing of new products as well as being standard instruments for automatic test systems The wide range of output selection combined with excellent load line regulation creates a vital instrument in your lab environment The PPS Series come standard with a GPIB interface and a three year warranty Plus all units come standard with output voltage and current programming overvoltage and overcurrent protection remote sense reverse polarity protection and output enable disable All models of the programmable power supply series are able to be calibrated either in local or remote mode 1 2 INSPECTION When you unpack your new programmable power supply from its original packaging carefully check each item for damage that may have occurred during shipment If anything is damaged or missing please contact Motech Industries Inc for immediate service 1 3 INCLUDED ITEMS Programmable Power Supply Operation Manual Power Cord 1 4 CAUTIONS AND WARNINGS 1 The input power requirements for the programmable power supplies are 115 230 VAC 10 or 240VAC 10 50 60 Hz 2 Before begin to operate the power supply set the correct voltage 115 or 230 240 VAC setting equal to the applied voltage otherwise damage will result to the power supply 3 Do not use solvents or aromatic hydr
50. he unit indicates remote operation when the RMT annunciator on the display is on 4 2 GENERAL INFORMATION 1 The power supplies are able to directly accept programming values of voltage current and overvoltage When a valid input is made the unit will round off the value to the nearest multiple of the resolution If a nonvalid input is made the unit will display INPUT ERROR and return to previous set values 2 The actual operation of programming the voltage and current values is simple Simply press any of the functional keys and the display shows the present value To change this value simply use the numeric keys to enter a value If an error is made press the CLEAR key and then reselect the parameter that was to be modified Once the final value is set press the ENTER key LCD module will display the actual value initiate the function and return the unit to metering mode If a user wishes to recall a setting press the function key pertaining to the operation For example to recall a set voltage press VSET and then press ENTER or CLEAR key to return unit to metering mode 3 To reset any of the output parameters 1 e VSET ISET OVSET simply press the desired function key enter the new value and press ENTER The Programming steps are identical to steps are identical to steps described in sections 4 3 4 5 4 The PPS 1200 series has two output channels and these may be alt
51. his case you may obtain further improvement to the stability by a Keeping the load capacitance as small as possible b Increasing the diameter of the load lead to reduce resistance If heavier gauge load lead 10 or greater are used circumstances may arise when the load lead inductance and the load capacitance can form an underdamped filter This filter occasionally has the effect of destabilizing phase response In this case the above steps can worsen stability since they will reduce damping in the system 3 4 LOAD CONSIDERATION AND MULTIPLE LOADS CONNECTION When the supply is in local sensing mode and you are connecting multiple loads to the output connect each load to the output terminal using separate load leads This minimizes mutual coupling effects and takes full advantages of the supply s low output resistance Each pair of wires should be as short as possible and twisted or bundled to reduce lead inductance and noise pickup If cabling considerations require the use of distribution terminals that are located remotely from the supply connect the power supply output terminals to the remote distribution terminals by a pair of twisted or bundled weirs Connect each load to the distribution terminals separately Remote voltage sensing is recommended in these circumstances Sense either at the remote distribution terminals or if one load is more sensitive than the others directly at the critical load OUTPUT ISOLATION The output of
52. hout notice 48 SPECIFICATION continued MODEL PPS 2013 2012 PPS 2014 PPS 2015 PPS 2016 PPS 2017 A PPS 2018 A PPS 2019 A AC INPUT One internal switch permits operation of 115 or 230 240 Vac line voltage Input Current 115VAC 3A 5A 230VAC 1 5A 2 5A Fuse Rating AC input is protected by a rear panel mounted fuse 115VAC 5A 5A 5A SA 8A 230VAC 2 5A 4A 115 120 Vac or 230 240 Vac 10 115 120 Vac or 115 120 Vac or 230 240 Vac 10 230 240 Vac 8 Frequency 50 to 60 Hz Maximum VA 343VA 350VA 343VA 350VA 350VA 343VA 572VA 340VA S00VA 340VA S00VA Maximum Power 268W 273W 268W 273W 273W 268W 457W 270W 400W 270W 400W Peak Inrush current 60A 60A 60A 60A 60A 80A 60A 60A DC OUTPUT MAXIMUM RATINGS Voltage 30V 25V 60V 60V 128V 250V Current 6A 8A 3A 5A 1 5A 2A 0 8A 1A DC OUTPUT PROGRAMMING RANGE Voltage 0 30V 0 25V 0 35V 0 60V 0 60V 0 128V 0 250V Current 0 6A 0 8A 0 5A 0 3A 0 5A 0 1 5A 2A 0 0 8A 1A PROGRAMMING RESOLUTION LSB Voltage and current programming are monotonic over full temperature range Voltage 10mV 10mV 2mV 5mV 20mV 40mV Current 2mA 2mA 7mA 3mA 1mA 2mA 0 5mA OVP 400mV 800mV PROGRAMMING ACCURACY If the unit is recalibrated at a temperature other 25 C these specifications apply over a temperature band of 5 Caround calibration temperature Voltage 0 05 2LSB 0 05 2LSB 0 05 2LSB 0 05 2LSB 0 05 2LSB 0 05 2LSB 0 05 2LSB Current 0 15 5LSB 0 15 5LSB 0 15 5LSB 0 15 5LSB 0 15 5LSB 0 15 5LSB 0 15 5LSB OVP 2 4
53. ich devices to send and receive data The controller also provides command specifications within other devices The PPS series supply the following IEEE 488 interface functions L4 Basic Listener Unaddressable if MTA T6 Basic Talker Serial Poll Unaddressed if MTA SHI Full Source Handshake AHI Full Acceptor Handshake RLI Remote amp Local Lockout DCI Device Clear El Open Collector Driver Electronics 250kb s max CO Non system controller SRO Omitted Service Request Function TEO Omitted extended talker function LEO Omitted extended listener function PPO Omitted parallel poll function DTO Omitted device trigger 5 2 2 ADDRESS SETTING OF GPIB INTERFACE The main purpose of address setting is for specifying unit identification between the instruments and controller in a GPIB connection system The PPS Series has 31 addresses 0 30 available If a number higher than 30 is selected the display shows INPUT ERROR and defaults to previous values The power supplies are preset at the address 12 by the factory To view the present address press the ADDRESS key If the present value is incorrect enter in a new value with numeric keys and press ENTER key In remote mode the ADDRESS command is available to modify the address 24 5 3 PROGRAMMING SYNTAX The following table lists programming commands available with the PPS Series These standard GPIB commands readily interface with programming languages Note tha
54. ing two steps fail to resolve the problem please call your local distributors lt NOTE gt ATTEMPTED REPAIR MODIFICATIONS OR TAMPERING BY UNAUTHORIZED PERSONNEL WILL VOID THE WARRANTY 36 7 3 WARRANTY INFORMATION TWO YEAR LIMITED WARRANTY Motech Industries Inc warrants to the original user or purchaser that your unit is free from any defects in material or workmanship for a period of two years from the date of purchase If any defect is discovered within the warranty period Motech Industries Inc will repair or replace the unit subject to verification of the defect or malfunction upon delivery or prepaid shipment to Motech Industries Inc IMPORTANT 1 Unless a problem is discovered upon initial inspection after purchase of the unit please do not return the product to the distributor where it was purchased Motech Industries Inc accepts the responsibility of keeping you a satisfied customer 2 If out of warranty or any service not covered by this warranty is needed please contact the Motech Industries Inc for current charges This warranty does not apply to defects or to physical damage resulting from abuse neglect accident improper repair alteration or unreasonable use of the unit resulting in but not limited to cracked or broken cases or parts or to units damaged by excessive heat Except upon initial purchase this warranty does not cover finish or appearance items nor does it cover times damaged in shipment to
55. lease refer to the programming syntax commands for proper nomenclature of commands 5 5 5 OVERCURRENT PROTECTION OCP The overcurrent programming feature protects the load from excessive output currents The OCP mode cannot be used while the power supply is operating in CC mode since OCP would disable the output The OCP command is enabled by a logic 1 and disabled by a logic 0 For example to enable a channel for overcurrent protection Enter OCPI to disable a channel form OCP Enter 29 OCPO 5 5 6 TRACK COMMAND This command may be controlled by a true 1 or false 0 command The TRACK command is only applicable to the PPS 1200 series The ensuing example will assist in clarifying the command To set the tracking mode in the PPS 1200 series send TRACK 1 Refer to section 4 7 for more information on the PPS 1200 series tracking mode 5 6 FUNDAMENTALS OF PROGRAMMING The following section explains fundamental operations of programming the supply in remote mode Before beginning operation have your system completely installed and set up accepted do not have a load applied at the outputs Be aware at all times of power supply s voltage and current limits If data greater than the range of the power supply is programmed data 1s disregarded and a error occurs Due to the extent of programming languages available only common programming commands will be discussed ADDRESS SELECTION The first step involved in remote
56. nt voltage and specified type normal blow time delay etc should be used Do not use repaired fuses or short circuited fuseholders To do so could cause a shock or fire hazard DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE Do not operate the instrument in the presence of flammable gases or fumes KEEP AWAY FROM LIVE CIRCUITS Operating personnel must not remove instrument covers Component replacement and internal adjustments must be made by qualified service personnel Do not replace components with power cable connected Under certain conditions dangerous voltages may exist even with the power cable removed To avoid injuries always disconnect power discharge circuits and remove external voltage sources before touching components DO NOT SERVICE OR ADJUST ALONE Do not attempt internal service or adjustment unless another person capable of rendering first aid and resuscitation is present DO NOT EXCEED INPUT RATINGS This instrument must be connected to a properly grounded receptacle to minimize electric shock hazard Operation 55 at line voltages or frequencies in excess of those stated on the data plate may cause leakage currents in excess of 5 0mA peak SAFETY SYMBOLS TH Chassis ground symbol E Protective conductor terminal A Caution risk of electric shock DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT Because of the danger of introducing additional hazards do not install substitute parts or perform any unau
57. ocarbons to clean the module as they may damage the finish If cleaning is necessary use only a mild solution of soap and warm water Be careful not to allow water to enter the unit Please be sure to always disconnect the power cord before cleaning 4 Use only specified fuses Do not use a substitute fuse which is of a different size and rating Otherwise damage may result to the unit Do not substitute or modify any internal circuits Exercise extreme caution when cables are over four feet in length Turns off AC power or disable unit before disconnecting load or floating voltages Operates the power supply with properly rated wire sizes ONAN 1 5 LOCATION AND COOLING 1 The proper operating temperature for the power supply are from 0 C to 50 C The unit ventilates by drawing air through the sides and exhausting 1t through the rear 2 Proper ventilation area for the power supplies is at least 1 of spacing on all sides 3 The PPS are built to configure into 1 2 rack mount configurations 1 6 GPIB INTERFACE CONNECTOR The GPIB connector on the rear panel connects your supply to the computer and other GPIB devices A GPIB system can be connected in any configuration star linear or both as long as the following rules are observed 1 The total number of devices including the computer should not be greater than 15 2 The total length of all cables used should not be more than 2 meters times the number of devices connected toge
58. ositive rear screw terminal for remote sense output Enabled hard wiring 33 Chassis Ground Terminal Ground rear screw terminal 34 External analog input voltage for programming output voltage Input voltage ranges from 0 Volts to 10 Volts 35 Voltage external programming reference point 36 External analog input voltage for programming output current Input voltage ranges from 0 Volts to 10 Volts 37 Current external programming reference point lt NOTES gt 1 The rear panel configuration is identical on all power supplies However the PPS 1200 series have an additional terminal strip for hard wiring the second channel 2 The PPS 1000 and PPS 2000 series have an external programming input terminal located at the rear of the supply Please refer to section 3 7 for further information 2 2 LCD STATUS ANNUNCIATORS LIQUID CRYSTAL DISPLAY Figure F 1 F 2 F 3 OCP2 6 cci E B OCP cco m 30 00V 0 000A y RMT UM M ovei fae m INPUT ERROR y 9 Se i 9 Figure F 1 LCD of PPS 1200 series lt NOTE gt 1 CCl 2 CC2 3 RMT 4 TRK 5 OCPI 6 OCP2 7 OVPI 8 OVP2 1 15 cc E 30 00v 0 0004 RMT M OVP 3 l 7 Figure F 2 LCD of PPS 1000 2000 series CC W 30 00V 0 000A m OCP RMT High mM OVP 3 7 10 Figure F 3 LCD of PPS 1020 series The LCD display real tim
59. r can demand control However a non active controller may request control Driver circuits are TTL and Schottky compatible This section contains information on controlling the power supply via a computer this material is presented in a normal manner in which a majority of programmers may benefit Main topics of operation to be covered are GPIB Operation Programming Syntax Programming the Power Supply The GPIB sections discuss the interface functions settings and interface The Programming Syntax section lists all available programming commands Last Programming the Power Supply includes a variety of conditions commands and samples useful for controlling the power supply via the computer 23 5 2 GPIB OPERATION The GPIB General Purpose Interface Bus operation allows for constant talk and listen between systems The PPS series are able to act as both talkers and listeners The computer is able to act as a talker listener and controller LISTENER A device capable of accepting data over an interface TALKER A device capable of transmitting data over an interface CONTROLLER A device capable of specifying the talker and listener for an information transfer 5 2 1 GPIB INTERFACE FUNCTIONS Even though the GPIB control is implemented in the power supply instructions are only enabled when a computer is equipped with a GPIB interface controller card A controller manages the operation of the bus system by designating wh
60. rly proportioned to an external input voltage from 0 to 10 volts The external analog programming mode is activated by setting these parameters via the front panel or GPIB bus VSET to 0V ISET to a proper value for CV operation or setting ISET to 0A and VSET to a proper value for CC operation To control the output voltage with the analog programming ee requires the following procedures apply the external 0 to 10V source Vv pgm between Vp positive and V common terminals These input terminals are located at the rear of the power supply see figure L The control output voltage is Vout Vv pgm Rated Maximum Output Voltage 10 To control the output current with the analog programming mode requires the following procedure apply the external 0 to 10V source VI pgm between Ip positive and vI common terminals see figure L The control output current is Tout VI pgm Rated Maximum Output Voltage 10 To control both voltage and current simultaneously in the external programming method requires that the user apply two separately isolated 0 to 10V supplies lt NOTES gt Vp Vn W and vi are strapped with shorting straps Do not remove the straps unless activating the external analog programming mode 17 The V and I terminals are at a negative sense potential with this in mind do not connect them to any other terminal on the rear panel This precaution will permanent damage to the power supply lt 7 N CAU
61. rred in the load leads and this adds to its voltage regulation By connecting the supply for voltage remote sensing as shown in figure G voltage is sensed at the load rather than at the output terminals This allows the supply to automatically compensate for voltage drop in the load leads and improve regulation In remote sensing the VOUT query and the front panel meter monitor load voltage at the sensing points When the supply is connected for remote sensing the OVP circuit senses at the main output terminal and not at the sense points The voltage sensed by the OVP circuit could be significantly higher than the voltage bring regulated at the load Therefore set OVP threshold voltage accordingly 3 3 1 REMOTE SENSE CONFIGURATION Turn off the power supply before modifying any connections on the rear panel terminal block Configure the unit for remote sensing by first disconnecting the shorting plugs between the sense and load terminals Connect the load and sense leads to the load as in figure G Bear in mind that sense and load leads should be as short as possible Additionally the sense leads resistance should be no greater than 0 5 ohm lead and the voltage drop over the load leads should be no greater than 0 5V lead CAUTION NO OPERATOR SERVICEABLE PARTS INSIDE REFER SERVICING TO TRAINED SERVICE PERSONNEL WARNING FOR CONTINUED PROTECTION AGAINST FIRE HAZARD REPLACE ONLY WITH SAME TYPE AND RATING OF FUSE GP IB OUTP
62. s operate independently of each other in CV operation one of the outputs must dominate 14 control over the other Additionally the dominant output must operate in CV mode while the other output may operate in CC mode As an example of this operation let s assume in figure H that output channel two operates in CC mode and output channel one operates in CV mode Perform the following steps 1 Set output channel two to the maximum output voltage of desired range 2 Set output channel one to the desired operating voltage The voltage of output channel one controls the voltage across the load The output currents are algebraic sums of the individual outputs 3 5 2 CC OPERATION The CC operation is similar in many ways to the CV operation except that the output current must also be set To obtain CC operation perform the following steps 1 Program output voltage of the two channels to the desired operating voltage 2 Program output channel one to one half the desired operating current 3 Program output channel two to one half the desired operating current Both output operate in CC mode 3 5 3 REMOTE SENSING CONFIGURATION Parallel Connection Mode The following figure I illustrated the configuration for Remote Sensing in Parallel Operation CAUTION NO OPERATOR SERVICEABLE PARTS INSIDE REFER SERVICING TO TRAINED SERVICE PERSONNEL WARNING FOR CONTINUED PROTECTION AGAINST FIRE HAZARD REPLACE ONLY WITH SAME TYPE AND
63. set Press the OVP 4 key and the annunciation will stop blinking Turn the output on and press the OVP 4 key again lt NOTES gt When remote sensing take into consideration the voltage drop across the load leads since the threshold measurement is taken at the output terminals In inductive load applications a high surge voltage would enable the OVP circuit and disable the output Also note the programming resolution and programming accuracy specifications When the OVP circuit is disabled the threshold voltage becomes invalid 4 5 3 ENABLING DISABLING OVERCURRENT PROTECTION To enable the overcurrent protection circuit press the OCP 5 key and the OCP annunciation is turned on To disable the overcurrent protection press the OCP 5 key again and the annunciation is turned off When the OCP annunciation is blinking the overcurrent protection circuit has been activated and disabled the output An audible signal will also sound To reset Press the OCP 5 key and the annunciation will stop blinking Turn the output on and press the OCP 5 key again lt NOTE gt If OCP is on and the constant current mode CC is activated the power supply output is disabled 4 6 ENABLING DISABLING OUTPUTS 21 All modes of the PPS series have the capability of disabling their output to have their setting parameters modified Once the modification has been completed one can enable the power supply to operate at the ne
64. supply holds the VSET value in a sample hold circuit till the proper command has been executed Therefore to retrieve data onto the screen send PRINT 1 ENTER12 INPUT 2 VOLTAGE PRINT VOLTAGE SETTING VOLTAGE The PPS series are capable of output voltage and current to the bus Therefore one may send queries to read in the values from the supply In our example we set an output voltage of 11V and current of 1 7A Let us recall these actual output values To query the voltage output of the power supply send PRINT 1 OUTPUT 12 VOUT Now proceed to obtain the voltage output value PRINT 1 ENTER 12 INPUT 2 V PRINT VOUTPUT V 31 The screen now shows a value of approximately 11V To query the current of the power supply send PRINT 1 OUTPUT 12 IOUT Now proceed to obtain the current output value PRINT 1 ENTER 12 INPUT 2 I PRINT IOUTPUT I Now simply short the output terminals and the LCD screen will now display a value of approximately 1 7 amps The same methods presented here hold true for programming overvoltage and overcurrent protection as well as other GPIB commands In order to return the supply to local mode press the LCL key on the front panel lt NOTE gt Attempting to modify values conditions via the front panel display during remote operation is not Possible However values conditions may be monitored during remote operation 32 SIX CALIBRATION 6 1 I
65. t or replace the fuse please perform the following steps 1 Disconnect the AC line cord from the unit to reduce electrical shock hazard 2 Remove the fuse by sliding out the fuse holder The fuseholder is beneath the AC Receptacle Test the fuse for electrical continuity with an ohmmeter 3 Ifthe fuse us found to be defective replace it with a replacement fuse as specified in the following table Models Fuse Rating PPS 1001 230V 2AT 250V 115V 4AT 250V PPS 1002 1007 230V 1AT 250V 115V 2AT 250V PPS 1021 1022 230V 2AT 250V 115V 4AT 250V PPS 2013 2019 and 1204 230V 2 5AT 250V 115V 5AT 250V PPS 1201 1206 230V 2AT 250V 115V 4AT 250V except PPS 1204 4 Replace the fuse in the fuseholder and re install 5 Reconnect the AC power cord lt NOTE gt USE OF ANY FUSE OTHER THAN THE ONE SPECIFIED MAY CAUSE DAMAGE TO THE UNIT POSE A SEVERE FIRE HAZARD AND WILL VOID THE WARRANTY 7 2 IN CASE OF DIFFICULTIES This programmable power supply has been designed to be accurate reliable and easy to use However it is possible that you may experience difficulties during operation If there appears to be any kind of problem during the use of the unit please perform the following steps to help determine the cause 1 Re read the operating instructions It is very easy to inadvertently make mistakes in operating procedure 2 Remove and test the fuse The power supply will not function with an open fuse If the preced
66. t this portion of the manual only deals with GPIB commands No programming language commands are presented here Appendix A gives a summary of the command definitions 5 3 1 GPIB DEVICE COMMANDS LIST Command PPS 1000series PPS 1020series PPS 2000series PPS1200series Type Input Output CALCHNL 0 1 0 1 0 1 0 3 I Input OCP 0 1 0 1 0 1 0 1 I Input OUT 0 1 0 1 0 1 I Input OUTI 0 1 I Input OUT2 0 1 I Input TRACK 0 1 I Input OVP 0 1 0 1 0 1 0 1 I Input PROGRAMMING COMMANDS VSET E m R Input ISET R Input OVSET s R Input VSETI R Input VSET2 m R Input ISET1 z R Input ISET2 R Input OVSETI R Input OVSET2 R Input ADDRESS i I Input QUERY COMMANDS VOUT o R Output IOUT l R Output VSET k R Output ISET T E T R Output OVSET R Output VOUTI id R Output VOUT2 X R Output IOUTI R Output IOUT2 R Output VSETI T I Output VSET2 io R Output ISET1 R Output ISET2 T R Output OVSETI R Output OVSET2 r R Output STATUS m di si A Output ERROR A Output 25 5 3 2 CALIBRATION COMMANDS Command PPS 1000series PPS 1020series PPS 2000series PPS1200series Type Input Output VOFF gt a t R Input VFS v T R Input IOFF R Input IFS 7 R Input NOTE 1 Types of data entry I Integer R Real A ASCII code 2 Types of input output INPUT Input to the PPS OUTPUT Output to the PPS 3 The CALCHNL commands for th
67. tage 25V V 3 5V V ke Current 0 02A V 0 035A V EXTERNAL ANALOG PROGRAMMING ACCURACY Voltage 0 1 160mV 0 1 20mV Current 0 1 0 3mA 0 1 0 4mA LOAD EFFECT Load effect is defined as the maximum change in output due to a load change up to the maximum voltage or current rating Voltage 0 001 1mV 0 001 1mV Current 0 1mA 0 1mA Remote sense operation is possible with up to 0 5V drop for positive and negative output load leads Specifications are subject to change without notice 40 SPECIFICATION continued PPS 1001 PPS 1002 PPS 1003 PPS 1004 PPS 1005 PPS 1006 Maximum output change for a line voltage change within rating 1mV 1mV ImV 1mA mA 1mA 1mA PARD PERIODIC AND RANDOM DEVIATION AND NOISE RMS PK PK 20Hz 20MHz with output ungrounded 1mVrms 10mVp p 1mVrms 10mVp p mVrms 10mVp p 1mVrms 10mVp p 1mVrms 10mVp p 2 5mVrms 40mVp p 1mArms 1mArms mArms 1mArms 1mArms 0 5mArms TEMPERATURE COEFFICIENT The temperature coefficient is defined as the change in output per degree Celsius after a 30 minute warm up period 100ppm C 100ppm C 00ppm C 100ppm C 100ppm C 100ppm C 200ppm C 200ppm C 200ppm C 200ppm C 200ppm C 200ppm C DRIFT STABILITY The drift is defined as the change in output over an eight hour internal under constant line load and ambient temperature after a 30 minute warm up period Voltage 0 01 1mV 0 01 1mV 0 01 3mV 0 01 3mV 0 01 6mV 0 01 10mV Current 0 1 10mA 0 1 5mA 0 1 2mA 0 1 2mA 0 1 1mA 0 1 0 5mA
68. ther or a maximum length of 20 meters Please do not stack more than three connector blocks together on any GPIB port The resulting leverage can exert excessive force on the mounting panels Make sure that all connectors are fully seated and that the lock screws are firmly hand tightened Use a screwdriver only when removing the screw form the mounting panel TWO GETTING STARTED 2 1 UNIT FAMILIARIZATION Use the following illustrations of the power supplies in conjunction with the descriptions to familiarize yourself with the unit Front Panel Figure A B C D 1 8 12 9 13 10 14 11 15 MO TzSr PROGRAMMABLE DC POWER SUPPLY vsET ISET LOL 30 00V 0 000A 777 7 8 9 CLEAR High o ca o lo 4 5 6 ONIOFF OVP A i 1 g h 2 SELECT lt v UTILITY 0 ENTER POWER por Oo Pos 2 CE pem Ss 2 6 16 3 19 4 20 5 17 7 21 18 23 22 Figure A Front Panel of PPS 1020 Series 1 8 12 9 13 10 14 11 15 Y Li MO TzSr PROGRAMMABLE DC POWER SUPPLY FUNCTION DATA ENTRY C gt or vsET ser ide aut 30 00V 0 000A T L7 8 9 CLEAR ovser ocr ADOR OUTPUT Da 5 6 ON OFF OVP A BEEP gt u 1 2 3 SELECT 4 Y gt UTILITY 0 ENTER POWER N pr I P s 1 s o OFF A R N PN EZ ENE 2 6 16 3 19 4 20 5 17 7 21 18 23 22 Figure B Front Panel of PPS 1000 2000 Series
69. thorized modification to the instrument Return the instrument to a qualified dealers for service and repair to ensure that safety features are maintained INSTRUMENTS WHICH APPEAR DAMAGED OR DEFECTIVE SHOULD BE MADE INOPERATIVE AND SECURED AGAINST UNINTENDED OPERATION UNTIL THEY CAN BE REPAIRED BY QUALIFIED SERVICE PERSONNEL 56 MU NET MOTECH INDUSTRIES INCORPORATED 6 F No 59 Tsao Dih Woei Shen Keng Hsiang Taipei Hsien Taiwan Tel 886 2 2662 5093 886 2 2662 51 94 Fax 886 2 2662 5097 http www motechind com e mail tt amp m motechind com ZOM PPSCE 1E
70. to 80 RH Storage 20 C to 70 C 20 to 80 RH WEIGHT 18 lbs 16 lbs 16 lbs 16 lbs 16 lbs 16 lbs DIMENSIONS 8 4 x5 2 x15 7 for all models Specifications are subject to change without notice 41 SPECIFICATION continued MODEL PPS 1007 PPS 1008 PPS 1008A SOURCE EFFECT Maximum output change for a line voltage change within rating Voltage 1mV 1mV 1mV Current 0 1mA 0 1mA 0 1mA PARD PERIODIC AND RANDOM DEVIATION AND NOISE RMS PK PK 20Hz 20MHz with output ungrounded Voltage 3mVrms 40mVp p 1mV 10mVp p 1mV 10mVp p Current 0 2mArms 0 2mArms 0 2mArms TEMPERATURE COEFFICINT The temperature coefficient is defined as the change in output per degree Celsius after a 30 minute warm up period Voltage 100ppm C 100ppm C 100ppm C Current 200ppm C 200ppm C 200ppm C DRIFT STABILITY The drift is defined as the change in output over an eight hour internal under constant line load and ambient temperature after a 30 minute warm up period Voltage 0 1 20mV 0 01 3mV 0 01 3mV Current 0 1 0 5mA 0 1 0 3mA 0 1 0 3mA LOAD TRANSIENT RESPONSE The time required for the output voltage to recover within a band of 0 1 of rated voltage around the nominal voltage within a 50 variation in load current Recovery Time 50us 50us 50us PROGRAMMING UP DOWN SPEED The total programming UP DOWN time is the sum of output voltage response time and the programming command processing time
71. trument must be carefully packed preferably in its original carton and should be accompanied by a letter or note containing the following information User s Name Proof of Purchase User s Address Description of Problem Model number Serial number If service is desired such as calibration it must be stated in the enclosed letter For non warranty repairs and for calibration the correct service charge must accompany the unit in the form of a check or money order payable to Motech Industries Inc NOTE ALL INSTRUMENTS WHICH ARE RETURNED FOR REPAIR OR CALIBRATION MUST HAVE AN ASSIGNED R M A NUMBER WRITTEN ON THE FRONT OF THE PACKAGE THIS NUMBER MAY BE OBTAINED BY OUR SALES DEPARTMENT ANY INSTRUMENT DELIVERED WITHOUT THIS NUMBER WILL BE REFUSED AND RETURNED IF the ERROR 2 shows on LCD the calibration data in the EEPROM has been erased The power supply needs to be recalibrated Please process the EEPROM reset procedure below and follow the calibration procedures in the manual and enter the correct calibration value the ERROR 2 will disappear as well as the beep sound EEPROM Reset Procedure for PPS series OCP Press the key and the CLEAR key simultaneously 38 EIGHT APPENDICES A SPECIFICATION continued The following lists the performance specifications for the American Reliance Inc Linear Programmable DC Power Supply Series All specifications are at rear terminals with a resistive load and local sensing unless oth
72. ue to a load change up to the maximum voltage or current rating 0 001 1mV 0 001 1mV 0 001 1mV 0 001 1mV 0 001 1mV 0 001 1mV 1mA 1mA 1mA 1mA 1mA 0 1mA Remote sense operation is possible with up to 0 5V drop for positive and negative output load leads Specifications are subject to change without notice 45 SPECIFICATION continued PPS 1201 PPS 1202 PPS 1203 PPS 1204 PPS 1205 PPS 1206 Maximum output change for a line voltage change within rating ImV 1mA 1mA 1mA 1mA PARD PERIODIC AND RANDOM DEVIATION AND NOISE RMS PK PK 20Hz 20MHz with output ungrounded ImVrms 10mVp p ImVrms l0mVp p ImVrms l0mVp p ImVrms l0mVp p ImVrms l0mVp p 2 5mVrms 40mVp p 1mArms 1mArms 1mArms 1mArms 1mArms 0 5mArms TEMPERATURE COEFFICIENT The temperature coefficient is defined as the change in output per degree Celsius after a 30minute warm up period 100ppm C 100ppm C 100ppm C 100ppm C 100ppm C 100ppm C 200ppm C 200ppm C 200ppm C 200ppm C 200ppm C 200ppm C The drift is defined as the change in output over an eight hour internal under constant line load and ambient temperature after a 30 minute warm up period 0 01 1mV 0 01 1mV 0 01 3mV 0 01 3mV 0 01 6mV 0 01 10mV 0 1 6mA 0 1 5mA 0 1 2mA 0 1 3mA 0 1 1mA 0 1 0 5mA LOAD TRANSIENT RESPONSE The time required for the output voltage to recover within a band of 0 1 of rated voltage around the nominal voltage within a 50 variation in load current Recovery Time 50us 50us 50us 50us
73. ut voltage VOUTI Queries the output voltage of channel one PPS 1200 series only VOUT2 Queries the output voltage of channel two PPS 1200 series only VSETI Queries the set voltage value of channel one PPS 1200 series only VSET2 Queries the set voltage value of channel two PPS 1200 series only RANGE 0 low current 1 high current for PPS 1020 series only MODEL Queries the model no of the power supply IDN Queries the model no of the power supply for only PPS 1200GSM series only BEEP 0 beeper function disable 1 beeper function disable 52 2 force beeper alarm 3 beeper alarm off C QUERY MESSAGES ERROR CODE MESSAGE DEFINITION No Errors Command String Error Numeric String out of Range Numeric String Over Length Command Sequence Error NOTE 1 All GPIB commands are caes nonsensitivity ASCII codes 2 Allow many command string 3 STATUS operation explanation After STATUS command accepted PPS will display a decimal number in ASCII convert this decimal number to binary form Each bit indicated a action status Channel 1 gt CHI Channel 2 gt CH2 bit 0 0 NO ERROR 1 ERROR bit 1 0 CH1 OUTPUT OFF 1 CH1 OUTPUT ON bit 2 0 CH1 OCP ON 1 CH1 OCP OFF bit 3 0 CHI OC NOT OCCUR 1 CH1 OC OCCUR bit 4 0 CH1 OV NOT OCCUR 1 CH1 OV OCCUR bit 5 0 CH1 CV MODE 1 CH1 CC MODE bit 6 0 LOW RANGE 1 HIGH RANGE bit 7 0 BEEPER ON 1 BEEPER OFF bit 8 0 arrow in CHANNEL 1 1
74. vailable OUT Set the output on or off OUTI Sets the output of channel one on or off for PPS 1200 series only OUT2 Sets the output of channel two on or off for PPS 1200 series only OVSET Set the overvoltage protection OVSETI Set the overvoltage protection value for channel one for PPS 1200 series only OVSET2 Set the overvoltage protection value for channel two for PPS 1200 series only TRACK Sets the tracking mode of the PPS 1200 series VES Sets the fullscale voltage for calibration VOFF Sets the offset voltage for calibration VSET Sets the voltage VSETI Sets the voltage to channel one for PPS 1200 series only VSET2 Sets the voltage to channel two for PPS 1200 series only VERSION Display version no HELP Display command list MAI Set the low current range to channel one for PPS 1200GSM gt series only 51 MA2 Set the low current range to channel two for PPS 1200GSM series only B COMMAND SUMMARIES PPS 1200 series only OUT2 i I Queries the current output channel two PPS 1200 series only ISET1 Queries the set current output of channel one PPS 1200 series only ISET2 Queries the set current output of channel two PPS 1200 series only OVSETI Queries the overvoltage value for channel one PPS 1200 series only OVSET2 Queries the overvoltage value for channel two PPS 1200 series only STATUS Queries the status of the power supply see note 3 VOUT Queries the outp
75. w values The output is enabled or disabled by pressing the OUTPUT ON OFF key The PPS 1200 series output is enabled or disabled by selecting the channel s and pressing the OUTPUT ON OFF key 4 7 TRACKING OPERATION PPS 1200 series The PPS 1200 series has the ability of tracking since it has two outputs When the tracking mode is enabled the annunciation is on The output of channel two is identical in sync with to channel one and is controlled by channel one For instance a voltage increase in channel one would also cause a voltage increase in channel two 4 8 RANGE OPERATION PPS 1020 series The PPS 1020 series has two operating ranges High or Low These ranges are controlled by adjusting the voltage and current values to the appropriate programming settings refer to fig G section three appendix A The LCD displays Low when the low range is active or High when the high range is active All other operations on the PPS 1020 series are identical to other modes For more information on operating range characteristics please refer to section 3 2 4 9 AUDIBLE SIGNAL The power supplies have an audible indicator which allow monitoring of operating conditions When functions are activated or parameters set the audible signal will sound Should the protection modes be activated an audible signal will sound indicating a change in an operating mode has occurred The LCD and annunciators will indicat

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