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HP 59501A User's Manual

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1. E erem emen erm A tomes errem ee mem HP IB ISOLATED D A POWER SUPPLY PROGRAMMER MODEL 59501A RO Ek Les d PACKARD HEWLETT hp S de d MANUAL CHANGES Model 59501 A HP IB Isolated D A Power Supply Programmer Manual HP Part No 59501 90001 Make ail corrections in the manual according to errata below then check the following table for your instrument s serial number and enter any listed change s in the manual SERIAL 001 50 00244 00245 00799 00800 up MAKE CHANGES ERRATA On schematic Figure 7 3 Sheet 2 in output amplif er circuit connect one end of C22 to instead of On Main Board Assy A1 component location diagram in 5 regulated supply circuit add reference designation U32 to pads to the right of C27 in Table 5 1 page 5 1 change logic probe impedance to 25kt2 CHANGE 1 This change incorporates vertically mounted variable resistors to make calibration easier and to avoid wiper jump On page 6 6 make the following changes to the Replaceable Parts Table R26 change to 25k HP Part No 2100 3282 R49 change HP Part No to 2100 3089 R61 change to 25k HP Part No 2100 3282 On schematic Figure 7 3 Sheet 2 change values of R26 and R61 to 25k f ERRATA On page 6 9 change the HP Part No of the line cord used in the U S Canada Japan Italy and Spain to 8120 1348 CHANGE 2 On page 6 8 change the HP Part No of the A
2. P DW Obra o e KA 4 1 tipe Ed EF Lirik EL Waed dae isi afl da eae spiato il ms Es Explanation E Sets fixed point format with three digits to the right of the decimal This allows for better accuracy when performing the adjustment specified in line 8 2 Setup instruction 3 10 Calibration routine using ZERO ADJUST and D A FULL SCALE ADJUST controls on the 59501A Note that in line 7 an average value is calculated so that the adjustment can be completed in the minimum number of steps 11 User inputs desired output voltage 10 to 9 98 on keyboard 12 If the voltage requested is too high Voltage too high appears on the display for three seconds and then the program returns to line 11 13 14 Proper range is selected and correct data word value N is calculated 15 Data word N representing the desired positive or negative output voltage is sent to the 59501A Format f4 0 deletes leading spaces and z suppresses carriage return line feed characters If leading spaces are not deleted and CR LF characters are not suppressed the output will go to an undesired value see paragraph 3 36 3 17 3 34 SAMPLE COMPUTER PROGRAM 3 85 A sample program for controlling the 59501A in a HP Real Time Executive RTE 2100 series computer environ ment is given in example 10 The program is written in FORTRAN IV and duplicates the sample program given in example 8 The sample program of examp
3. ZERO ADJUST TYPICAL HP POWER SUPPLY 59501A ill pz Figure 3 6 Typical COnnections for CC Programming 3 45 59501A HP Power Supply Connections 3 46 Tab e 3 1 lists the HP Power Supplies that can be programmed on the HP IB using the 59501A The table specifies if a supply is capable of CV and or CC programming with the 59501 A and also lists the applicable 59501 A power supply connection diagram The accuracy of a power supply 59501 A combination is the sum of the 59501 A s accuracy plus the accuracy of the particular power supply 59501 A power supply programming accuracy specifications are given in Section 1 3 6 6002A NOTE One 59501A can only program a supply s CV or CC output If it is desired to program both CV and CC on the HP IB two 59501A s are required with their address switches set to different addresses 3 47 The leads AWG No 24 minimum connecting the 59501A to the power supply should be twisted to reduce noise pickup The longer the connecting leads the more noise that can be introduced Shielding will further improve noise rejection After completing the connections install the pro tective covers over the terminal strips on the B9501A and on the supply Table 3 1 HP Power Supply 59501A Capability Guide Power Supply Model 59501A Programming Yes 3 7 Yes Capabilities 3 12 6101A 02A Yes 3 7 ur 6104A 05A Yes 3 7 3 13 6106A Yes 3 7 6111A 13A Yes 3 7
4. 6114A 15A Yes 3 7 3 13 6116A Yes 3 7 6177C 81C 86C No e 3 14 6200B 03B Yes 3 7 3 12 6204B 0GB Yes 3 7 62078 09B Yes 3 7 3 12 62208 24B 26B Yes 3 7 3 12 6227B 28B Yes 3 7 3 12 6253A 55A Yes 3 7 3 12 6256B 6274B Yes 3 7 3 12 6281A 84A 89A 94A 99A Yes 3 7 3 12 6282A 85A 86A 90A 91A 96A Yes 3 7 3 12 6427B 6448B Yes 3 8 6453A 56B 59A Yes 3 9 3 15 6464C Yes 3 10 3 15 6466C 6483C Yes 3 8 3 15 6823A 24A Yes 3 11 6825A 6827A Yes 3 11 3 16 3 17 3 48 CV Programming Connections Figures 3 7 through 3 11 illustrate the connections required to program the CV output of the applicable power supplies The dotted line connections represent jumpers which must be removed Ail other jumpers must be installed as illustrated Note that only those power supply terminals pertinent to CV program ming are shown Complete terminal strip details are pro vided in the appropriate power supply Operating and Service Manual Most of the supplies are programmed using the connections illustrated in Figure 3 7 The specific connec tions for each supply are tabulated on the diagram 3 49 Special Protection Circuit As indicated on Figure 3 7 some of the supplies contain a special protection circuit which must be considered when programming with the 59501A The supplies affected are models 6256B through 6274B 6282A 6285A 6286A 6290A 6291A and 6296A Down programming the output voltage of these supplies may ac
5. COS MOS Hex Inverter IC COS MOS Triple 3 Input OR Gate IC 12 Bit D A Converter IC Operational Amplifier IC Operational Amplifier IC 5V Regulator IC Dual 15V Reg IC Diode zener 12 4V 5 Diode zener 16 2V 5 Replaceable Parts MFR PART NO meth 0 we 0 C2 we dh a wb wb b mh wb mde 6 7 C4 1 8 TO 68R1 F CA 1 8 TO A222 F C4 1 8 TO 1962 F C4 1 8 TO 4643 F C4 1 8 475R F C4 1 8 TO 1962 F CA 1 8 TO 2002 F C4 1 8 TO 1001 F C4 1 8 TO 10RO F C4 1 8 TO 9311 F C4 1 8 TO 5621 F C4 1 8 TO 2152 F R51A 1 3321 F C4 1 8 TO 4751 F C4 1 8 TO 1502 F C4 1 8 TO 4423 F SN74LS14N 93L24DC SN74LS30N SN7438N SN74LS27N SN74LSO4N SN74LSOON SN74LSON SN74LS00N SN74LS221N SN74LSOON SN74LSO4N CD4042AY CD4081BY CD4015AE CD4027AE CD4069BY CD4075BY LM301AH LM308 MC7805C MC1468 MFR CODE HP PART NO 0757 0397 0698 3450 0698 3157 0698 3260 0757 0415 0698 3157 0757 0449 0757 0280 0757 0346 0698 0064 0757 0200 0757 0199 0811 1999 0811 3029 0757 0437 0757 0446 0698 3460 3101 1973 0360 1833 1820 1416 1820 0904 1820 1207 1820 0621 1820 1206 1820 1199 1820 1197 1820 1204 1820 1197 1820 1437 1820 1197 1820 1199 1990 0608 1820 1540 1820 1486 1820 0976 1820 0938 1820 1404 1820 1405 1820 1856 1820 0223 1826 0172 1826 0144 1826 0140 1902 3185 1902 0184 RS w o OT x Table 6 4 Replaceable Parts REF MFR DESIG DES
6. M INT 0 5123 001 0 5 V 244 x 002 1 M INT 512 8 V 0 488 1 N 1000 512 V 0 512V N 1512 data word value In this example the desired output voltage is 0 5123 volts 3 28 High Range The desired output voltage values are but the actual output is 0 512V because the resolution is from 10V to 9 98V Calculations are similar to those 1mV least significant digit equals 001 for the low range except resolution is 20mV on the high V MxD range and 10 must be added to desired positive or negative V 512 x 001 output voltage in order to calculate the correct magnitude V 0 512 digits For this range the eguation for the magnitude portion M of the data word value is 3 25 High Range The desired 59501A output voltage M INT V 10 D 0 5 values are from 0 to 9 99V The calculations are the same Example desired voltage 5 123V as for the low range except resolution is 10mV end the D 02 high range is used For the high range R 2000 Let D 01 M INT 5 123 10 D 0 5 and R 2000 M INT 243 85 0 5 M INT 244 35 244 3 26 Bipolar Mode N 2000 244 2244 In this example the desired output voltage is 5 123V but 3 27 Low Range The desired 59501A output vottage the actual output is 5 12V because the resolution is 20mV values are from 1V to 0 998V programmable in 999 002 steps For a 1V output the magnitude digits are 000 and V Mx D 10 for a 0 998V output t
7. the 9830A to talk and the 58501A to listen However the variable data that will be sent to the 59501 A is included in the output statement line 120 In line 120 13 specifies the HP IB interface Variable N can be any number from 1000 to 1999 or from 2000 to 2999 If the variable were equal to 1256 Example 4 would program the same output as Example 1 Note that in Example 4 line 11 uses format specification F1005 0 and line 120 ends in a semi colon The F1005 0 format specification deletes leading spaces from the output data item and specifies a field width of four digits space for sign is suppressed with no decimal places The use of the semi colon line 120 suppresses the carriage return line feed codes at the end of the output statement If the leading spaces are not deleted and the CR LF codes are not suppressed the 59501A output will go to an undesired value Example 4 Sending a Variable Data 9830A Output Statement 100 CMD U amp 110 FORMAT F1005 0 120 OUTPUT 13 110 N 3 36 _ Example 5 illustrates how a write statement 9825 A is used to send variable data to the 59501A 1f variable N in line 1 were equal to 1250 this example would program the same output as the previous examples Format specification 14 0 deletes leading spaces and the z suppresses the CR LF codes for the same reasons as described above Example 5 Sending Variable Data 9825A Write Statement Q frat 1 14 4 z 1 wet 706 1 N 3 37 US
8. 0467 0757 0427 0757 0289 0757 0467 0757 0453 0698 3493 0757 0289 0698 3450 0698 6351 0757 0421 0757 0461 0698 3151 2100 3308 0757 0465 0757 0459 0811 0617 0698 3157 0698 3493 0757 0467 0698 7666 0757 0397 0757 0280 0698 3157 2100 3307 RS e NE IP NT eu EE MEO DP k Ged N add SEE E N DESCRIPTION fxd film 68 1 196 1 8W fxd film 42 2k 1 1 8W fxd film 19 6k 1 1 8W fxd film 464k 1 1 8W fxd film 475 1 1 8W fxd film 19 6k 1 1 8W fxd film 20k 1 1 8W fxd film 1k 1 1 8W fxd film 10 1 1 8W fxd film 9 31k 1 1 8W fxd film 5 62k 1 1 8W fxd film 21 5k 1 1 8W fxd ww 3 32k 1 1W fxd ww 100k 5 10W fxd film 4 75k 1 1 8W fxd film 15k 1 1 8W fxd film 442k 1 1 8W Address switch Barrier block 6 terminal Hex Schmitt Trig Inverter IC Digital comparator IC Table 6 4 8 Input Positive NAND Gate IC Quad 2 Input Positive NAND Buffer Open Coll 1C Triple 3 Input Positive NOR Gate Hex Inverter IC Quad 2 Input Positive NAND Gate IC Dual 4 Input NAND Gate IC Quad 2 Input Positive NAND Gate IC Dual Monostable Multivibrator with Schmitt Trig Inputs IC Quad 2 Input Positive NAND Gate IC Hex Inverter 1C Dual High Speed Optically Coupled Isolators COS MOS Quad Clocked D Latch IC COS MOS Quad 2 Input AND Gate IC COS MOS Dual 4 Stage Static Shift Reg IC COS MOS Dual J K F F IC
9. 62098 EN OUTPUT CONNECT S TO TERMINAL A6 ON THE 59501A INSTEAD THAT LiSTED FOR Ct A 5uF CAPACITOR AND A 248 RESISTOR CONNECTED IN SERIES BETWEEN TERMINALS A2 AND ARE REQUIRED TO MAINTAIN PARD PERFORMANCE SEE 6227B 6228B o B S MANUAL FOR WIRING IN INSTRUCTIONS THESE SUPPLIES CONTAIN SPECIAL PRO G256B 59B 60B 618 638 A3 A21 648 658 66B 67B 68B 3 51 If the Option J30 power supply s front panel TECTION CIRCUITS WHICH MUST BE CON SIDERED WHEN PROGRAMMING WITH THE VOL TAGE controls are left connected in the circuit they must be set to maximum resistance fully CW If they are rotated CCW the output of the supply will be decreased 69B 718 74B i 6282A 85A 86A 90A 91k 96A Figure 3 7 CV Programming Connections for HP Power Supplies with S Comman A5 ji 59501A SEE PARAGRAPH 3 49 d bL FU NOTE The dotted line connections represent jumpers which must be removed All other jumpers must be installed HP POWER SUPPLY _ 64534 64568 OR 64594 2 eee OR ET HP POWER SUPPLY i 64278 64488 6464C 6483C 8 64640 6483c i CURRENT 4 PROGRAMS OUTPUT VOLTAGE OF SUPPLY cv COMPARISON FACTORY INSTALLED SPECIAL AMEGIEIER OPTION J30 REQUIRED ON POWER SUPPLY SEE PARA 3 50 VOLTAGE 3 ww MAY BE USED IN PLACE OF POWER SUPPLY S VOLTAGE CONTROL EE AAN EL anal Figure 3 8 CV Programming Connections for HP P
10. Hewlett Packard Electronic Instruments and Systems catalog HP Part No 5061 0088 5061 0094 1460 1345 5061 0054 5061 0076 5061 0055 5061 0096 Description Two front handles that attach to each side of 3 1 2 high cabinets Kit of lock link hardware for joining together cabinets of equal depth Units can be joined side by side or vertically This kit is required whenever two or more sub module units are to be rack mounted side by side Tilt stand snaps into standard foot supplied with instrument must be used in pairs Rack mounting kit for one half module width unit 3 1 2 inches high Includes one rack flange ear and one half module width extention panel adapter Rack mounting kit for two half module units 31 2 high Kit includes two rack flanges ears Also lock together kit 5061 0094 is required for joining the two units together The cabinets must also be of equal depth Rack mounting kit for two units one half module width and one guarter module width Kit includes one rack flange and one quarter width extension adapter Lock together kit 5061 0094 is required for joining the two units Support shelf for mounting one or more 3 1 2 high units which are half module or quarter module width Cabinet depths need not be equal 1 2 5061 2021 Front filler panel one quarter module width for 3 1 2 high support shelf 5061 2022 Front filler panel one half module width
11. Thus the output amplifier provides one of the following output ranges depending upon the range digit programmed and the position of the UNIPOLAR BIPOLAR switch Low Range High Range UNIPOLAR 0 to 0 999V 0 to 9 99V BIPOLAR to 0 998V 10 to 9 98V 4 13 The output amplifier includes overvoltage protec tion and current limiting circuits to protect the 59501 A and user equipment In addition a turn on turn off control circuit clamps the output terminals at a low level when power is turned on or off The purpose of this circuit is to prevent transients at power turn on and turn off from affecting the output of the 59501A and also prevent random programming of a power supply prior to receipt of valid programming data 4 14 The front panel ZERO ADJUST allows a zero 250mV output adjustment The D A FULL SCALE ADJUST allows setting the maximum 59501A output 2590 in the high and low ranges 4 15 When the 59501 A is used as a power supply pro grammer the POWER SUPPLY FULL SCALE ADJUST potentiometers COARSE and FINE allow the user to set the maximum power supply output when the 59501A is programmed to its maximum output Power supply programming is accomplished by connecting the 59501 A s output terminals to the power supply s voltage program ming terminals see Section IH 4 16 DETAILED CIRCUIT DESCRIPTION 4 17 The following paragraphs describe in more detail the operation of the 59501A s major circuits Not
12. Transfer Timing Diagram character into data storage 1 U26 J K flip flop The trailing edge of the first clock pulse transfers the data input U25 7 into the shift register causing Q1 U25 5 to go HI With O1 HI with Q1 HI b Cycie 2 The second clock pulse produces a positive pulse L2 at character is latch The trailing edge of the second clock pulses causes the L2 AND gate U24 6 is enabled Also the data input U25 7 goes LO U24 4 While L2 is HI the first magnitude tranferred into data storage 1 U18 four bit U25 to shift Q1 goes LO O2 goes HI With Q2 HI the data input U25 7 remains LO and the L3 AND gate U24 1 is enabled 4 5 c Cycle 3 The third clock pulse produces a positive pulse L3 at U24 3 While L3 is HI the second magnitude character is transferred into data storage 1 U19 four bit latch The trailing edge of the third clock pulse shifts U25 O2 goes LO O3 goes HI With OS HI data input remains LO and the L4 AND gate U24 13 is enabled d Cycle 4 The fourth clock pulse produces a positive pulse L4 at U24 11 White L4 is HI the third magnitude character is transferred into storage level 1 U20 four bit latch The trailing edge of the fourth clock pulse shifts U25 O3 goes LO O4 goes Hi When Q4 goes Hi the range character and the three magnitude characters are loaded into the data storage 2 latches U26 and U21 U23 The O4 HI transition also causes U25 13 P O turn on o
13. constant data value of 1280 which is sent to the 59501A Example 2 Sending a Constant Data Value 9825A Command Statement 59501A Listen Address Calculator Talk Address Uniisten Command 98034A Select Code 7 cmd 7 U amp 12607 Range Digit Magnitude Digits Data Word 3 33 Example 3 illustrates a write statement 9825A calculator which can also be used to address the 59501A to listen and send a constant data value The 595014 listen address of amp corresponds to an address of 06 as defined in the 9825A General VO ROM manual 09825 90024 Chapter 4 Note the format statement line O used in Example 3 The c specifies a character field while the z is used to suppress carriage return line feed codes at the end of the write statement Suppression of the carriage return line feed codes is essential when programming the 59501A If they are not suppressed they will be processed as data characters by 59501A resulting in an undesired output Example 3 Sending a Constant Data Value 9825A Write Statement Suppresses CR LF Codes fmt 1 c Z 1 wrt 706 1 1250 98034 A Select 59501A Address Code 3 34 Command statements can only be used to send data constants Output 9830A or write 9825A statements can variables 3 35 Example 4 illustrates how an output statement 9830A is used to send variable data to the 59501A This example includes a command statement fine 100 enabling
14. mode ATN is LO or if the 59501A is in the listen mode listen flip flop set and ATN is HI data mode For either of the above conditions the output of NAND gate U8 3 goes Hi and NAND gate U5 6 goes LO enabling the acceptor handshake circuits Figure 4 2 illustrates the 3 wire hand shake cycle timing seguence for each character received by the 59501A in the command and data modes To Initially the NRFD signal J1 7 is HI 59501A is ready for data and the NDAC signal J1 8 is LO data not accepted Also DAV J1 6 is HI data on bus is not valid T4 The source assume controller puts a character on the bus and indicates that the character is valid by setting DAV J1 6 LO Ty After a delay of approximately 1usec NRFD goes LO 59501A not ready for data Also accept data signals ACDS U11 13 and ACDS U11 4 are generated a If the HP IB is in the command mode ATN LO the ACDS signal gates a recognized command character 59501 A s listen address amp or unlisten command which sets or resets the listen flip flop see paragraph 4 24 b If the HP IB is in the data more ATN HI and the 59501A had previously been addressed to listen the ACDS signal gates the clock generator producing a clock pulse which loads the data character range or magnitude present on bus lines DI01 DI04 into the appropriate storage register see paragraph 4 31 T4 After approximately 15usec the trailing positive edge
15. operating instructions and program ming examples are provided to cover both applications Additional information regarding use of the 595014 is provided in HP IB Power Supply Application Guide HP Part No 5952 3990 3 3 PRE OPERATIONAL CONSIDERATIONS 3 4 Before connecting the 59501 A to an ac power source ensure that the proper operating voltage 100 120 220 or 240Vac has been selected and the proper fuse is installed see paragraph 2 27 Also check that the address switches are set correctly the UNIPOLAR BIPOLAR mode switch is set to the desired position and all HP IB system cabling is installed see paragraphs 2 20 through 2 26 Connections between the 59501A and the user s device e g HP Power Supply are described in subsequent para graphs 3 5 CONTROLS AND INDICATORS 3 6 Front Panel 3 7 The 59501A front panel contains a power on indi cator a status indicator and four controls screwdriver ad justments as shown in Figure 3 1 3 8 The power on ON indicator Figure 3 1 lights and the 59501A s internal supply voltages 15V t15V V aa are present when the line cord is plugged in 3 9 The LISTENING indicator 2 lights when the 595014 is addressed to listen and remains iighted until an unlisten command or the interface clear signal is received from the controller When lighted it indicates that the 59501 is enabled to process data words received on the HP IB When it is not lighted it indicates tha
16. output could be set to 20V when the 59501A is programmed to its maxi mum value In this case all 999 programming steps are utilized in programming the supply from 0 to 20V with a resolution of 20mV approx Calibration of power supply outputs is described in paragraph 3 53 through 3 59 ZERO KBJUST B Figure 3 1 59501A Front Panel 3 14 Rear Panel 3 15 The 59501A rear panel contains the HP IB connec tor the ADDRESS switches the UNIPOLAR BIPOLAR mode switch the ac power module and the output term inal strip as shown in Figure 3 2 a HP IB connector Interfaces directly to HP IB paragraph 2 17 ADDRESS switches Select listen address of 59501A paragraph 2 22 c UNIPOLAR BIPOLAR switch Selects either the unipolar of bipolar output mode para graph 2 25 Ac Power Module Contains fuse and ac input voltage select PC board paragraph 2 27 b 3 16 The 59501A is interfaced with the user s device via the output terminal strip Output terminals A1 and A2 allow access to the 59501 A s D A output while terminals A3 through A5 allow access to the power supply program ming network Figure 3 3 illustrates the connections re guired to program the output voltage of a typical HP power supply In this case a jumper is connected between termin als A2 and A3 and terminals A1 A4 and A5 are connected to the voltage programming terminals of the power supply The method of programming and th
17. register U25 in the data storage sequencer is reset and the data input U25 7 is a Hi level The timing sequence that occurs during the transfer of a data word is described below Refer to Figure 4 3 a Cycle 1 The first clock pulse produces a negative DATA LINES acos Hi AIUH 13 Lo CLOCK TP2 AU 5 DATA AU25 7 it AlU27 6 a AiU25 5 ue Ali24 4 Q2 AiU25 4 L3 LAIU 24 3 Q3 AiU25 3 L4 AlU 24 11 Q4 TP5 AiU25 1O RESET Atu 25 6 Figur pulse L1 at U27 6 The trailing edge of L1 loads the range MAGNITUDE i RANGE MSD LSD t OR 2 0 9 o 9 0 9 EE EIE u u ger ER CHAR NG CHAR NO 2 CHAR NO 3 j CHAR NO 4 A ee T DATA WORD i i l i li JE pb Jp 2n i I t i Ad ip i i i i l i 1 i i 1 I F i I pem LOAD CHAR NO f INTO DATA STORAGE 1 1 I H I i ij x i i U l l 1 1 ei ge LOAD CHAR NOZ INTO DATA STORAGE l i i l i i i i i i i j LOAD CHAR NO 3 INTO DATA STORAGE i i o i I i t LOAD CHAR NO 4 INTO 4 Je i ATA STORAGE 1 i i I i I i LOAD DATA WORD 4 CHARACTERS INTO 1 DATA STORAGE 2 i I l i t I i i l i i F i i i i pa T ju SEC mi Ip SEC m e Tu SEC ede ITuSEC HS CYCLE HS CYCLE HSCYCLE HS CYCLE L 2 3 4 l e 68 sec ny ou e 4 3 Data Word
18. the output of the power supply will rise to about 2596 of its rating With the 59501A con nected the open circuit condit on is prevented because a protection circuit in the 59501 A presents a low impedance to the J30 input when ac power is removed from the 59501A see paragraph 4 13 for all programming voltage received from the 59501A As indicated on Figure 3 8 the user may disable the front panel VOLTAGE controls and connect the 59501A s POWER SUPPLY FULL SCALE ADJUST in their place Refer to the applicable power supply s Operating and Service Manual for additional connection information NOTE The dotted fine connections represent jumpers which must be removed All other jumpers must be installed ev COMPARISON AMPLIF IER 001 MODE SWITCH ON 6002A MUST BE SET TO CC OR LOCAL BIA OZA 06A POWER SUPPLY TERMINAL A8 S NOT SHOWN ON THE CONNECTION DIAGRAM PRECISION POWER SUPPLIES ACCURACY IS SIGNIFICANTLY REDUCED WHEN PROGRAMMING WITH 59501A 6104A 05A 4A 5A 61HA IZA 3A 6A i POWER SUPPLIES ACCURACY IS SIGNIFI CANTLY REDUCED WHEN PRGMING WITH 59501A 62608 046 O58 O6B 208 SAME VALUE FOR THE CAPACITOR AS THAT LISTED FOR Ci A8 A CAPACITOR IS REQUIRED BETWEEN TER MINALS A6 AND S TO MAINTAIN PARD PER FORMANCE REFER TO APPLICABLE DA MANUAL PARTS LIST AND USE THE SAME VALUE FOR THE CAPACITOR AS THAT LISTED 62018 028 038 078 208 248 26B 53A 55A 81A B4A A5 FOR MODEL
19. 01A output between terminals A1 and A2 The extra resistor R77 between terminals A5 and A6 is used only when program ming power supplies above 300 volts 3 43 As shown in Figure 3 5 the supply s internal reference voltage FV pp and VO LTAGE control are disconnected dotted lines and are replaced with the 50501 A s output voltage and POWER SUPPLY FULL SCALE ADJUST Note that in the unipolar mode 59501A output terminal A1 is negative with respect to A2 This polarity must be comptied with when making connections supplies 3 44 Constant Current Figure 3 6 illustrates the connections required for the 59501A to program the out put current of a typical HP power supply Programming constant current consists of replacing the internal reference with the output voltage from the 59501A and replacing the internal CURRENT control with the POWER SUPPLY FULL SCALE ADJUST controls on the 59501A With these connections the voltage developed across POWER SUPPLY FULL SCALE ADJUST Rp becomes the reference against which the voltage drop across the output current monitoring resistor Ry is compared The relationship between Ep and the supply s output current depends upon the resistance ratio Rp Rg and on the constant current pro gramming coefficient Kp of the particular supply The relationship between input voltage and output current is lout Epx Rp Kpx Re ZERO ADJUST _TYPICAL_HP POWER SUPPLY 59501A L HP POWER SUPPLY po
20. 1U32 heatsink to 59501 00007 p CHANGE 3 Change power transformer T1 Chassis Electrical HP Part No 59501 80090 to HP Part No 59501 80091 4 25 78 SECTION I GENERAL INFORMATION 1 1 INTRODUCTION 1 2 This instruction manual contains operating and service instructions for the HP IB Isolated D A Power Supply Programmer Model 59501A Installation instructions and sample programs are also provided The 59501A allows HP power supplies to be digitally controlied via the Hewlett Packard Interface Bus HP 1B from a calculator computer or other controller The digital format is bit parallel byte serial ASCII coded format The 59501A can also be used on the HP 1B as a digitally programmable tow level dc signal source Since the 59501 A can be controlled programmed by various control devices such as HP 9800 series calculators or the HP 2100 series computers hereafter in this manual the controlling device wil be referred to as the controller except when specific programming examples are provided 1 3 DESCRIPTION 1 4 The 595014 is basically a digital to analog D A converter that provides an output voltage in response to digital data received on the HP 1B Two programmable output ranges 1V and 10V are availabie In addition a switch on the rear panel allows selecting either a unipolar or bipolar output mode The unipolar mode provides a O to 999V or a 0 to 9 99V output range and the bipolar mode provides a 1V to 0 99
21. 2 changes the feedback path between U30 and U29 In the UNIPOLAR mode the output of U30 is connected to pins 10 10V SPAN R and 8 BIPOLAR OFFSET IN of U29 to obtain a U30 output range from 0 to 2 5V nom inal In the BIPOLAR mode the output of U30 is con nected to U29 10 however U29 8 BIPOLAR OFFSET IN is connected to the DAC s internal reference U29 4 through R24 For these connections the current to voltage converter U30 provides a bipolar output range from 2 5V to 2 5V nominal Variable resistor R26 allows for a zero output adjustment in the bipolar mode The U30 output is applied to the output amplifier through range resistors R45 R49 and or R52 4 38 Output Amplifier 4 39 The output amplifier is comprised of a range amplifier stage operational amplifier U31 voltage gain stages O3 O4 and complementary emitter follower stages 010 O11 The gain of the amplifier is determined by the range digit programmed 4 40 When high range is programmed range resistors R45 and R49 are shunted through range switch FET O5 see paragraph 4 44 The high range gain of the output amplifier is equal to R2 R56 gt R52 In the high range the amplifier provides a 0 to 9 99V output unipolar mode or a 10V to 9 98V output bipolar mode 4 41 When low range is programmed the gain of the amplifier is equal to R2 R56 R45 R49 R52 In the low range the amplifier s unipolar or bipolar output
22. 3 60 Sample Program A sample program for controlling power supply CV outputs is given in example 6 The pro gram is written specifically for a 9825A calculator but could be modified for use with other caiculators e g HP 9830A The program contains calibration and setup routines and allows the operator to input specific voltage values on the keyboard The program also inciudes automatic changing of ranges and error messages that indicate when the voltage requested by the operator exceeds the maximum value available or when a negative voltage is requested A line by line explanation is given after the program Programming fundamentals are provided in paragraphs 3 17 through 3 36 3 61 The sample program regu res use of the General I O and Extended I O ROM s After keying in the program press RUN on the calculator Ail operations required to complete the program are given on the calculator display After each operation is completed press CONTINUE The operator enters the maximum desired output voltage value e g 20 when Enter maximum output voltage appears on the display The program automatically uses 99 996 of this value e g 19 98 to calibrate the supply see paragraph 3 56 After connecting the load the operator enters the desired output voltage line 13 on the keyboard and press CONTINUE If it is desired to recalibrate the power supply change the maximum desired output voltage press STOP and then press RUN NOTE The
23. 49 9V the resolution is exactly 100mV 99 9V 999 3 64 Calibration To calibrate a 59501 A BPS A com bination for CV operation proceed as follows 3 65 Test Setup a Connect 59501 to an HP IB controller b Connect 59501A to BPS A as shown in Figure 3 11 c Connect DVM between S and S terminals models 68254 6827 A or between OS and CS terminals models 6823A 6824A Connect DVM common to S or OS terminal d On 59501 A set mode switch to BIPOLAR e On BPS A set mode switch to VAR GAIN AMP models 6825A 6827A or AMPLIFIER models 6823A 6824A Also turn VOLTAGE Gain controls on BPS A fully CCW f On BPS A models 6825A through 6827 A only set RANGE switch to desired output range and set CURRENT control to mid range approx Calibration Procedure a Apply power to the controller the 59501 A and the BPS A Allow 30 minute warm up b With the BPS A s output terminals open circuited program the 59501A to maximum positive output 2999 3 66 3 13 c Adjust VOLTAGE control on BPS A and D A FULL SCALE ADJUST on 59501A for the desired maximum positive output or 99 996 of desired max see paragraph 3 62 using DVM d Program 59501A to maximum negative output 2000 e Set ZERO ADJUST on 595014 for the desired maximum negative output from BPS A using DVM f Program 59501 A to maximum positive output 2999 g Set D A FULL SCALE ADJUST for the desired maximum positive output from BPS
24. 5VDC TO 5VDC Figure 2 2 HP IB Connector are not illustrated on Figure 2 3 These connections depend upon the particular power supply being programmed and the type of control desired output voltage or current The connections required to program various HP power supplies are provided in Section lil paragraph 3 45 through 3 52 2 22 Setting Addresses 2 23 The listen address for the 59501 A is selected by address switches on the rear of the unit The switches are factory set to the suggested listen address of amp when the unit is shipped from the factory As shown in Figure 2 4 there are seven address switches The last two switches 6 and 7 XX are ignored have no affect Switches 1 4 and 5 are set to 0 and switches 2 and 3 are set to 1 to select a listen address of amp Note that amp is the suggested listen address and is one of 31 listen address possibilities The address switch settings for each of the 31 listen address possibilities are listen in Table 2 1 CONTROLLER AODRESS SWITCH E G 9825A CALCULATOR 5 X X TL 98034A HP IB 1 0 CARD HP iB CABLE P O 98034A T d IGNORED HP IB ADDRESS CONNECTOR SWITCHES f OUTPUT I HOES BOG l TERMINALS Figure 2 4 Listen Address Switches on Rear of 59501A lt s al cr cw u potet ZOO ze az DEZ la lasa om Y WIE Table 2 1 Listen Addresses and Switch Settings BUS DEVICES UNIPOLAR BIPOLAR SWITCH
25. 861 Heatsink A1U32 1 1205 0282 Clip LED mount DS1 2 2 1400 0547 Retainer ring 2 1400 0540 Header Assy 2 5060 0458 6 8 Table 6 4 Replaceable Parts REF MFR HP DESIG DESCRIPTION TQ MFR PART NO CODE PART NO Switch bracket S2 59501 00006 1830 23201 59501 20004 59501 20002 59501 20003 Switch spacer Switch shaft Barrier block cover Barrier block guard 0380 0091 0370 0970 59501 00004 59501 00005 0370 0451 Standoff Knob pushbutton S2 Transformer bracket left Transformer bracket right Bezel pushbutton knob Miscellaneous OK AN AT OT OT OE OE Line fuse 62 5mAT 220 240Vac operation 1 MDL 1 16 71400 2110 0311 floater pad 28480 9211 1913 packing carton 28480 9220 2090 L ne cord One supplied according to the user s location as follows U S Canada Japan Italy and Spain 28480 8120 0050 United Kingdom 28480 8120 1351 East West Europe U A R 28480 9120 1689 Australia New Zealand 28480 8120 1369 6 9 SECTION Vil CIRCUIT DIAGRAMS AND COMPONENT LOCATION DIAGRAMS 7 1 INTRODUCTION 7 2 This section contains the circuit diagrams necessary for the operation and maintenance of the 59501A HP IB Isolated D A Power Supply Programmer 7 3 COMPONENT LOCATION DIAGRAMS 7 4 The component location illustrations Figures 7 1 and 7 2 show the physical location and reference designation of each part on the chassis and on printed POWER MODULE circuit board A1 The funct
26. 8IC OR AIR32 6166C MUST BE REMOVED x PROGRAMMING iS LIMITED TO RANGES SELECTED BY FRONT PANEL SWITCH Figure 3 14 CC Programming Connections for HP Constant Current Sources 6177C 6181C 6186C NOTE The dotted line connections represent jumpers which must be removed All other jumpers must be installed HP POWER SUPPLY 2 BE q WD ZERO ADJUST COMPARISON AMPLIFIER Figure 3 15 CC Programming Connections for HP Power Supply Models 6453 6483 BIPOLAR POWER SUPPLY AMPLIFIER 6825A Edda 2595018 MUN i ERO ADJUST i i POSITIVE S current REF COMPARISON AMPLIFIER i i Figure 3 16 Positive CC Programming Connections for BPS A s 6825A 6827A 3 10 BIPOLAR POWER SUPPLY AMPLIFIER SGREOR OBEN NEGATIVE CURRENT COMPARISON AMPLIFIER Figure 3 17 Negative CC Programming Connections for BPS A s 6825A 6827A 3 53 Power Supply CV Programming 3 54 The following paragraphs provide calibration procedures and a sample program which are applicable to all supplies listed for CV programming in Table 3 1 Cali bratinga supply for CV programming with the 59501 A consists essentially of two adjustments 1 Setting the supply s output to OV when the 59501A is programmed to zero 2 Setting the supply s output to a desired maxi mum value when the 59501 A is programmed to maximum 3 55 The maximum desired power supply output can be set to any value within the rating
27. 8V or a 10V to 9 98V output range The 59501 A s output can be used as a programming voltage for controlling a wide range of dc voltages and currents from HP power supplies or as a source voltage for testing electronic components such as integrated circuit packages 1C s 1 5 Isolators within the 59501 A protect other instru mentation on the HP IB from damage that could be caused by power supply outputs Also an internal circuit ensures that the output is held near zero until programmed data is received Power supply programming is accomplished through use of the 59501 A s programmable output voltage and its front panel adjustments By making the appropriate connections between the 59501 A s rear terminals and the programming terminals on the supply the output voltage or current if available of the power supply can be programmed from zero to its full rated output The 59501 A s front panel adjustments provide fast and easy cali bration of power supply outputs The ZERO ADJUST 1 1 enables the user to correct for small offsets in power supply response to programmed inputs The POWER SUPPLY FULL SCALE ADJUSTMENT COARSE and FINE allows the user to set the maximum output desired from the power supply when the 59501A is programmed to its maximum output This method of programming is called voltage programming with gain Power supply program ming is described in greater detail in Section HI 1 6 Programming the b9501 A is accompli
28. A h Repeat steps d through g until best possible accuracy is achieved NOTE The following steps apply only when calibrating BPS A models 6825A 6827A i Program 59501A to 2500 Connect a short across BPS A s output terminals j Program 59501 A to 2999 and adjust the BPS A s front panel CURRENT control for the desired maximum output current 1f a load changes causes this current limit to be exceeded the supply automatically crosses over to con stant current operation at this preset current limit and the output voltage drops proportionally Program 2500 Remove short from output terminals and connect load A 3 67 Sample Program Example 7 is a sample program using a 9825A calculator The program contains calibration and setup routines and allows the operator to input specific positive or negative voltage values on the keyboard The program also includes automatic changing of ranges and an error message if the voltage reguested by the operator exceeds the maximum bipolar value available A line by line explan ation is given after the program Programming fundamentals are provided in paragraphs 3 17 through 3 36 3 68 The sample program in example 7 requires use of the General I O and Extended I O ROM s After keying in the program press RUN on the calculator All operations required to complete the program are given on the calculator display After each operation is completed press CONTINUE Example 7 9825A S
29. AI U2 2103 UIE AtGI5 U T MU29 TOP VIEWS 14 UIO ug 923 U3 UI2 Ui4 25 U26 ED FI7V TO F3DV MEASURED BETWEEN U3 4 AND w U A U U A U27 028 ii ITV TO 30V MEASURES BEYWEEN U33 5 AND WW EROGOD acseeenaee oma wo mo A S32 ALII ra zi ze AIZ3 TOP VIEWS Figure 7 3 Sheet 1 Model 59501A Bias Voltage Supplies Schematic Diagram
30. ATE N PUT TO AIOT AND SP COMMON DIGITAL CIRCUITS DEFECTIVE SEE aio BLO Lm EYES Ed a RANGE SWETCH AGS Q6 DEFECTIVE CORRECT DIGITAL CIRCUITS DEFECTIVE 5FE FIG 5 3 CHECK VOLTAGE AT COLLECTOR OF Alga WITH RESPECT TO NY LCOMMONI AfU29 PROEABLY DEFECTIVE CHECK VOLTAGE AT a FAIU5I 6 WiYr REL NO SPECT TO W COMMON AGS OT GE OF NO Q9 DEFECTIVE AlQ2 OR Q4 DEFECTIVE MI AICRS CF5 CA9 j CRE WIG OR Gil DEFECTIVE END Or TEST Figure 5 2 Overall Troubleshooting Procedures Flow Chart 5 3 AlUZS DEFECTIVE APPLY POWER TO SOSOM AND TURN ON CONTROL ER MAKE THE FOLLOWING CHECKS WITH LOGIC PROBE CONNECT PROBE COMMON TO BUS COMMON r jo CHECK TURN ON PRESET CIRCUIT A QI2 Ut US PULSES NO jAlu27 U28 OR AT MuU27 8 UZS DEFECTIVE POWER ON 7 PRESET AIUIZ US OR JIG NO DATA ND AINE OR U a DEFECTIVE SEQUENCER j DEFECTIVE TYES PROGRAM 595044 ie LISTEN AD Fee SES OM NG REPLACE amp UP DRESS CONNECT JUMP ER BETWEEN COLLECTOR OF TOLISTEN AND 94 AND 57 i SENS 1999 PROGRAM UN LISTEN COMMAND DS OR AIRS DEFECTIVE f AE Ee WEB i I YES REMOVE JUMPER AO4 DEFECTIVE B WITH SO5DIA LISTE
31. ATORS RESLACE AIUI6 REPLACE DEFEL GA TIVE AUB LUIS OR U20 AS AP PLICABLE T REPLACE AIJT REPLACE DEFEC ku TIVE AlUZE 022 END OF TEST Figure 5 3 Digital Circuits Troubleshooting Flow Chart WARNING Exercise extreme caution when working on energized circuits 5 11 Overall Troubleshooting The overall troubleshoot ing procedures given in Figure 5 2 isolate a malfunction to the analog or digital sections of the 59501A Analog circuit malfunctions are isolated to the component level Addi tional troubleshooting flow charts Figures 5 3 and 5 4 are provided for digital circuit malfunctions b 12 The procedures given in Figure 5 2 first check the bias supply voltages to ensure that these voltages are correct before continuing with the troubleshooting If the supply voltages are correct the procedures continue to check if a malfunction is present in the analog or digital portions of the 59501A Ifa malfunction is not detected review the programming and operating instructions provided in Section lll to check if the fault was caused by a program ming or operating error NOTE TTL logic levels 1 true gt 2V false lt 0 8VJ are measured with respect to V CMOS logic levels 1 true gt 3 5V false lt 1 5V are measured with respect to WJ 5 13 Digital Circuits Troubleshooting The digital circuits troubleshooting procedures given in Figure 5 3 isolate a malfunction to components within the ci
32. CRIPTION TO MFR PART NO CODE ya Me Resistor Network 3k 6 2k 5 02W 216C 56289 Resistor Network 4 7k 5 0 17 5W 200C 1858 CRR 56289 HP PART NO 1810 0136 1810 0125 Front Panel Electrical DS1 2 Indicator Light Emitting Diode LISTENING POWER ON var 10 turn ww 10k 596 2W ZERO ADJUST R1 D A FULL SCALE ADJUST R2 POWER SUPPLY FULL SCALE FINE ADJUST R3 var 10 turn ww 100k 1596 2W POWER SUPPLY FULL SCALE COARSE ADJUST 1990 0521 2100 3624 2100 3623 Power Module includes voltage selection PC board and fuse C1 fxd metalized paper O 1uF 20 250V connected between power module terminals B and F Line Fuse 125mAT 100 120Vac operation 0160 4065 MDL 1 8 2100 0318 Chassis Electrical fxd cer 0 02uF 20 2kV Unipolar Bipolar Switch Power Transformer Connector J2 5 pin Mechanical 0160 2569 3101 1209 59501 80090 1251 4654 IC Socket 14 pin Address Switch S1 1 1200 0485 Front Panel 1 59501 00001 Sub Front Panel 1 59501 00002 Rear Panel 1 59501 00003 Standoff potentiometers R1 R4 4 59501 20001 Side Trim 2 5001 0438 Frame front 1 5020 8813 Foot 1 2 module 4 5040 7201 Trim strip 1 5040 7203 Top cover 1 5040 7208 Bottom cover 1 5040 7209 Side cover 2 5040 7212 PC board guide 6 5040 7
33. Connections range and 999 equals 99 9 of full range In the bipolar mode 000 equals the maximum negative voltage output 500 equals OV output and 999 equals the maximum positive voltage output 3 20 Calculating Data Word Values 3 21 The following paragraphs describe the data word value calculations required to program the output of the 59501A Similar calculations are required when program ming power supply outputs using the 59501A The pro grammabie output range depends of course upon the power supply model being programmed The desired output range of the particular power supply must be calibrated for pro gramming with the 59501A Power supply calibration pro cedures and sample programs are described in paragraphs 3 53 through 3 74 3 22 Data word value calculations for the high 10V and iow 1V 59501A output ranges are described below Calculations are provided for both the unipolar and bipolar output modes Each data word must be exactly four digits long one digit for range and three digits for magnitude If positive or negative output voltage within this range pro more than four digits are sent to the 59501 A the desired ceed as follows output voltage will not appear at the output 1 The resolution in the 1V to 0 998V range is 2mV Let D 002 3 23 Unipolar Mode 2 The range digit is 1 for the low range so add 1 to the left of the three magnitude digits 3 24 Low Range The desired 59501A output volt
34. E AlUi R UT DEFECTIVE JU5 U7 OR UB DEFECTIVE AUS DEFECTIVE NO AUB OR AIUD DEFECTIVE NO AIUI US OR R DEFECTIVE io AT AND 8 WHEN DAV IS GROUNDED YES NAC A1U5 1 WO BLINKS ON A AIU8 U6 OR UEI DEFECTIVE ok OER RE usn WHEN DAV YES i TOUCHED AUS US OR UE DEFECTIVE ACDS LAUH E3 AFU DEFECTIVE B INS ON WH N DAV E iS TOUCHED E END OF TEST Figure 5 4 Acceptor Handshake Circuits Troubleshooting Flow Chart 517 REPLACEMENT PARTS 5 18 Section VI of this manual contains a list of re piaceable parts If the part to be replaced does not have a standard manufacturer s part number it is a special part number and must be obtained directly from Hewlett Packard 5 19 ADJUSTMENT AND CALIBRATION 5 20 The 59501 A is factory calibrated to operate properly regardless of the mode selected unipolar or bipolar The calibration procedures described in para graphs 5 21 through 5 26 may be required after perform ing the checkout procedures troubleshooting or repair and replacement Once the unit is calibrated the front panel controls may be adjusted as required for unipolar or bipolar operation paragraphs 5 27 through 5 30 5 21 Calibration 5 22 The calibration procedures must be performed in the order in which they are presented in the following paragraphs 5 23 Test Setup a Remove the bottom cover to gain access to the potentiometers on t
35. IENTING P C BOARD CORRECTLY ANS PUSHING BOARD io INTO SLOT SECTION ZZ GIVES DETAILS L NS RS WET RI YU ALN WT BEE ORN wa HEV Ut U2 Ug H U3 UH qute m am oc v f oD eH ET i cls DE H gt i QI ok Or ARE pov icov I T U24 U27 U28 p Vpp i awe UO U31 pal WU el SY i i i i H i SV I i H T5V ir T T t Am REV al 12 I ISV 4 H ca cs fos ot ELEK 1 FA I bnd sl J Di GRAN OE EK RS M gt 100V ik mov 300v cev FI i MATIC NOTES L ALL RESISTORS ARE IN ORMS BW 21 UNLESS OTHERWISE INDICATED 4 THE SQUARE PLATED PADS ON THE P C BOARDS NDICATE ONE OF THE FOLLOWING 2 ALL CAPACITORS ARE iN MICROFARADS UNLESS CTHERWISE NOIGATED A PIN TOF ANY LG OR SESISTCR NETWORK E POSITIVE END OF A POLARIZED CAPACITOR 3 PIN LOCATIONS FOR INTEGRATED CIRCUITS AiUL AIUS2J AND RESISTOR NETWORKS LALZI AIZS ARE AS C CATHODE OF A DIODE GR EMITTER OF A TRANSISTOR FOLLOWS 5 THE LISTEN ADORESS FOR 7 595014 IS SPECIFIED BY THE FIVE ADDRESS SWITCHES ON THE REAR PANEL THE SUGGESTED LIS ADDRESS OF amp S SELECTED AT THE FACTORY HOWEVER ANY ONE OF M LISTEN ADORESSES CAN BE SELECTED THE REAR PANEL UNIPOLAR SIPOLAR SWITCH IPUSH IN PUSH OUT TYPE YS SET TO THE UNIPOLAR POSITION PUSKED IN AS SHIPPED FROM THE FACTORY 7 DENOTES FRONT PANEL MARKING ce ie l Noo A 25 GT 09 AQIQ Ol AICI 04 46 202 0
36. ING mi RCUETS TROUBLE THAN Od ON DVM RECHECK HIGH RANGE ZERO 2000 F DE SERED NO OFF 2 SHOOTING FIG END OF TEST Figure 5 1 Checkout Procedures Flow Chart 5 2 ONN T 5950A AND CON TROLLER TOHF IB SEY SIBMA MODE SWITCH TO UNI POLAR AND APPLY POWER TO SS5O A CHECK BIAS SUPPLY VOLTAGES ON THE A BOARD CONNECT METER LEADS ON At BOARD AS INDICATES BELCW fe nnn CORRECT BIAS SUF PLY VOLTAGE SCHEMATIC Sit CHECK THAT THE APPROPRIATE AC iN PUT VOLTAGE i PRE SENT SETWEEN THE PRIMARY WINDINSS OF POWER XFMR Tt SEE SCHEM Spis NG AC lt PRESENT CHECK OUTPUT VOLT TERMINALS CON NECT METER COM MON T az K LEVER AT CHEC TURN ON CONTROL LER PROGRAM BSG TO LISTEN ANC SEND 2999 CHECK LISTENING INDICATOR ANC MEA SURE doc TAGE VO TURN ON OFF CIR CUIT DEFECTIVE ACH G2 O7 Q9 DIBITAL CHRCUITS DEFECTIVE SEE A e TRIN ON p Je VOL TAGE NO ii gt NOS VpaG BETWEEN NS wai D TA i e TEE dese AT oge FIT OTIS AlJ30 6 AND 1 LCOMMON ead k aa PROGRAM 59soA TG CHECK CHECK LEVER AT AUJ25 I3 WITH RE SPECT 19 1m COMMON sal Aif YTO AZ DEFECTIVE FIG 5 8 CHECK RANGE SIG NAL AT AlU26 14 SPECT CE DEFECTIVE CHECK VOLTAGE BE TWEEN G
37. ING 59501A AS A POWER SUPPLY PROGRAMMER 3 38 Power supply programming is accomplished using the digitally controlled output voltage of the 59501A in conjunction with the ZERO ADJUST and POWER SUPPLY FULL SCALE ADJUST controls on the 59501A front panel By making the appropriate connections between the 59501 A s output terminals and the voltage programming terminals of a dc power supply the output voltage or cur rent of the power supply can be programmed from zero to the full rated output This method of programming is called voltage programming with gain 3 39 Voltage Programming With Gain 3 40 HP programmabte power supplies have certain features in common These features include an internal reference either a fixed regulated voltage or a fixed regu fated constant current source voltage and current compara tors with their input terminals and front panel controls voltage and current with connections at the rear panel terminals A power supply can be controlled by making the appropriate connections on the rear panel and applying an external voltage or in some cases current For example by disconnecting the internal reference voltage from the input circuits of the constant voltage comparator and replacing it with an external voltage source the output voltage of the power supply is programmed by the value of the externai voltage source 3 41 Figure 3 4 illustrates the method by which a power suppiy s constant voltage output
38. IO7 must be HI and line DIOG must be LO to specify that a listen address is present on the bus When the listen flip flop is set driver O 4 turns the LISTENING indicator on Also with the listen flip flop set the clock generator will be enabled when the bus is placed in the data mode ATN goes HI The clock generator produces clock pulses which gate the data seguencer storing the data characters received on the bus see paragraph 4 28 4 26 If the ATN tine goes LO again command mode and an unlisten command ASCI 7 is placed on the bus the listen flip flop is reset U12 3 goes LO when ACDS is 4 4 received turning off the LISTENING indicator inhibiting the clock generator and resetting the data sequencer Note that the interface clear TFC signal also resets the listen flip flop The IFC signal is used by the controller to ter minate activity on the bus 4 27 Clock Generator 4 28 The clock generator is enabled when the listen flip flop is set U12 3 is HI and the HP IB is in the data mode ATN is HI When enabled the clock generator produces a clock pulse approximately 4usec wide on the leading edge of the ACDS signal received from the acceptor handshake circuit The clock pulse gates the data storage sequencer which loads the data on lines DIO1 DIO4 into the appropriate storage latch see paragraph 4 32 4 29 Isolators 4 30 Data bits DIOT DIOA the sequencer clock signal and the seguencer reset signal are applied th
39. M SET D A FULL SC ADJUST FOR A DVM READING OF 99V rimV UNIPOLAR MODE FULL SCALE PEO GRAMMING ACCU RACY HIGH ANO LOW RANGES SEND DATA WORD 1998 CHECK Vy ON DYM ym LISTENING S NO IND ON LISTEN LOGIC YES SEND INTERFACE CLEAR FC SIGNAL CHECK LISTENING INDICATOR PRESS STOP KEY ON 9820 21 ZGA CALCULATORS CR RESET KEY ON 3825A CALCUL ATOR PERFORM ADJUST CECURES DO NOT WORK BIPOLAR UNt isomvi U PERFORM DIGITAL d POLAR SWITCH OR a LISTENING NO g CIRCUITS TROUBLE YES YES DAD ASU 29 IS PROS IND OFF 2 77 SHOOTING FIG ABL Y DEFECTIVE ym Y Ti ed RO ADJUST YES BIPOLAR MODE M READING __ FULL SCALE ERO N OF IOV 3 we PROGRAM SSSDJA T GRAMMING ACCU cr LISTEN AND SEND RACY DATA WORD 2000 CHECK Vo ON BVM SEND DATA WORD 2999 CHECK Vo I SET D A FULL SCALE ADJUST FOR DVM READING GE 9 98V SET ZERO ADJUST ON 5950A FOR A DVM RE ADING LESS THAN im V UNIPOLAR MODE CERO PROGRAM MING ACCURACY HIGH AND LOW RANGES PROSRAM 950 A TO UNLASTEN CHECK LISTENING INDICA SEND DATA WORD ODE CHECK vy ON DVM SET ZERO ADJUST MS PERFORM DIGITAL FOR A READING LESS j i IRCUITS TROUBLE 3 DECODER 1 LISTEN
40. N ADDRESS AIU2i U22 AND REPEATEDLY PRO U23 ARE AS F L i WITH UNLISTEN REPEATEDLY PRO A PIN i COMMAND CONTIN IGRAM THE 5950IA 10 j UDUSCY PROGRAM TO LISTEN AND ING LOGIC PROBE MED MAKE THE SEND I248 UWLISTEN ir a i CHECK THAT DECODER No CHECK ACCEPTOR LEVELS AT OUT i PULSES HANDSHAKE FIG i PUTS OF ARIS AT AUH IX 5 4 UIS AND UZO ARE 7 wo COLSES AS FOLLOWS IE KANS O AT ANO 82 Yes PIN LEVEL LISTEN YES vts toere i mt AQA DEFECTIVE f f i jis OR U8 pf PROGRAM SSEOTA FECTIVE TOLISTEN AND SEND 2666 r REPLACE DEFEC SPRINTER NO ane DEFECTIVE TIVE ANS BFS uz oF uio DATA i OR 920 AS AP i IDEFECTIVE i STORAGE i PLICABLE i H i E i i YES i REPLACE DEFEL d NG PULSE a ir Deere TIVE ARZE U22 OR S SES uT vive e i CHECK Alli UIS AT ADI A 2 UES AS APPLICABLE L i i YES ADDRESS SwiTCHES fr LEVEL AT NO SET INCORRECTLY REPLACE Att26 AUZ OR US NS AlUS I3 OR AlUZ OR US DEFECTIVE Ae os DEFECTIVE gare YES CHECK THAT INPUT LEVELS AT O OUT i AUZ OR U14 NO ue AO DE DEFECTIVE ARE AS FOLLOWS L CONNECT SCOPE COMMON l l H CONNECT TO FIPS OOM 2 HI w MON AND CONTINUE 91 0 CHECK THAT CHECKS AS FOLLOWS USiNG SCOPE LEVELS AT OUT PUTS OF AING UIS AND U20 ARE AS FOLLOWS PULSES NO PIN LEVEL XA AUIS 7 D REPLACE AUIS 9 tHl i 2 euo i 5 do YES iS LHI SOL
41. N2907 A C4 1 8 TO 383R F C4 1 8 TO 5111 F C4 1 8 TO 4222 F C4 1 8 TO 383R F C4 1 8 TO 4752 F C4 1 8 TO 4641 F C4 1 8 TO 301R F C4 1 8 TO 162R F C4 1 8 TO 4121 F C4 1 8 TO 1622 F C4 1 8 TO 2371 F C4 1 8 TO 10R0 F 3006P 1 203 C4 1 8 TO 1132 F C4 1 8 TO 3652 F C4 1 8 TO 1962 F C4 1 8 TO 1213 F C4 1 8 TO 1962 F C4 1 8 TO 5112 F C4 1 8 TO 1001 F CA 1 8 TO 2003 F CA 1 8 TO 1213 F C4 1 8 TO 1001 F C4 1 8 TO 1213 F C4 1 8 TO 1501 F C4 1 8 TO 1332 F CA 1 8 TO 1213 F CA 1 8 TO 3012 F CA 1 8 TO 4121 F C4 1 8 10 1332 F C4 1 8 TO 4222 F CA 1 8 TO 1333 F C4 1 8 TO 825R F C4 1 8 TO G812 F C4 1 8 TO 2871 F C4 1 8 TO 1003 F C4 1 8 TO 5622 F C4 1 8 TO 1962 F C4 1 8 TO 4121 F C4 1 8 TO 1213 F C4 1 8 TO 5603 F C4 1 8 TO 68R1 F C4 1 8 TO 1001 F C4 1 8 TO 1962 F 3006P 1 203 MFR CODE 07263 04713 284 80 24546 24546 24546 24546 24546 24546 24546 24546 24546 24546 24546 24546 32997 24546 24546 24546 24546 24546 24546 24546 24546 24546 24546 24546 24546 24546 24546 24546 24546 24546 24546 24546 24546 24546 24546 28480 24546 24546 28480 24546 24546 24546 24546 24546 24546 24546 32997 HP PART NO 1854 0477 1853 0281 1854 0071 0698 3446 0757 0438 0698 3450 0698 3446 0757 0457 0698 3155 0757 0410 0757 0405 0698 3493 0757 0447 0698 3150 0757 0346 2100 3307 0698 4121 0757 0455 0698 3157 0757 0467 0698 3157 0757 0458 0757 0280 0757 0472 0757 0467 0757 0280 0757
42. O5 to conduct The FET is used as a switch which has a very low on resistance and a very high off resistance While conducting O5 couples the output of U30 to the input of U31 via range resistor R52 R45 and R49 are bypassed 4 47 if a HI level is received transistor O6 is turned on causing Q5 to turn off For this condition the output of U30 is coupled to the input of U31 through range resistors R45 R49 and R52 4 48 The spike suppressor circuit in conjunction with range amplifier U31 suppresses voltage spikes that occur when the range switch is turned on or off Voltage limiting diodes CR8 and CR10 Schottky s protect U31 from excessive input voltages 4 49 Turn On Turn Off Control 4 50 The turn on turn off control circuit is comprised of shift register B U25 transistor stages O1 Q2 and FET s Q7 Q9 The purpose of this circuit is to prevent transients at power turn on and turn off from affecting the output To accomplish this the output is clamped at a fow level when power is turned on or off 4 51 Before power is turned on range amplifier U31 is shunted by FET O8 the output of amplifier stage O4 is clamped at a low level by FET Q7 and FET Q9 clamps the output of the O10 and O11 stages to ground When power is turned on the Vdd supply voltage junction R27 and R28 resets U25 U25 13 goes LO turning on Q1 With Q1 turned on FET s Q7 O8 and O9 continue to conduct to maintain the initial conditions low level ou
43. Operating and Service manual 13 User inputs desired voltage on keyboard 14 16 Ifthe voltage requested line 13 is negative or too high the appropriate error message appears on the display for three seconds and then the program returns to line 13 16 17 Proper range is selected and correct data word value N is calculated for the voltage requested 18 Data word N representing the desired output voltage is sent to the 59501A Format f4 0 deletes leading spaces and z suppresses the carriage return line feed codes see paragraph 3 36 3 62 BPS A CV Programming 3 63 The following paragraphs provide calibration procedures and a sample program for bipolar power suppty amplifier BPS A models 6824A through 6827A Calibra tion consists of setting the BPS A s desired bipolar output range when the 59501 A is programmed to its maximum negative and positive limits The desired bipolar range can be set to any value within the rating of the particular BPS A For example the maximum output range of model 6826A is from 50V to t50V To calibrate this range the BOV output is calibrated with the 59501 A programmed to 2000 and the 50V output is calibrated with the 59501 A programmed to 2999 Since the 59501A is pro grammable in 999 steps resolution is approximately 100mV 100 999 Note if it is desired to have a resolution equal to exactly 100mV the positive limit is set to 49 9V instead of 50V For this range 50V to
44. POWER i MODULE Y TT REAR Address Switches Listen Address pp ET 0 0 USER S DEVICE E G HP PRO PRAMMABEE y CC TERMINALS ojo 0 SP 0 0 0 0 1 EE Mr APPLICABLE HP PROGRAM ojo of1 jo MABLE POWER SUPPLIES ARE DESCRIBED IN SECTION TII 0 0 0 1 1 0 0 1 0 0 0 0 1 0 1 0 0 1 1 0 amp 0 0 1 1 1 i Figure 2 3 System Connections 0 1 0 0 0 0 1 0 0 1 2 24 The HP IB bus interface cards for the HP calcula 0 1 0 1 0 y tors are shipped from the factory with a preset talk address 0 1 O i 1 of U and a preset listen address of 5 Before program 0 1 1 0 0 i ming write down the listen and or talk address of all 0 1 1 0 1 s instruments connected to the HP IB 0 1 1 1 0 0 1 1 1 1 2 25 Unipolar Bipolar Mode Switch 1 olojoj o d 1 0 0 0 1 1 2 26 The UNIPOLAR BIPOLAR mode switch is a 1 0 0 1 0 2 push in push out type switch located on the rear of the 1 0 0 1 1 3 unit beneath the output terminal strip In the UNIPOLAR 1 0 1 0 0 4 mode switch s in the 59501A provides an output range 1 0 1 0 1 5 of 0 to 0 999V or 0 to 9 99V In the BIPOLAR mode 1 0 1 1 0 6 switch is out the 59501A provides an output range of 1 0 1 1 1 7 to 0 998V or 10V to 9 998V The switch is set 1 1 0 0 0 8 to UNIPOLAR when the unit is shipped from the factory 1 1 0 0 1 9 1 1 0 1 0 2 27 Input Power Requirements And Line 1 1 0 1 1 i Voltage Conversion 1 1 1 010 1 1 1 0 1 2 28 The 59500A may be operated contin
45. R43 R44 R45 R46 R47 R48 R49 R50 R51 R52 R53 R54 R55 R56 R57 R58 59 R60 R61 DESCRIPTION SS NPN SS PNP SS NPN Si fxd film 383 1 1 8W fxd film 5 11k 196 1 8W fxd film 42 2k 196 1 8W fxd film 383 1 1 8W fxd film 47 5k 196 1 8W fxd film 4 64k 1 1 8W fxd film 301 196 1 8W fxd film 162 196 1 8W fxd film 4 12k 196 1 8W fxd film 16 2k 196 1 BW fxd film 2 37k 1 1 8W fxd film 10 1 1 8W var cermet 20k 10 fxd film 11 3k 1 1 BW fxd film 36 5k 196 1 8W fxd film 19 6k 196 1 8W fxd film 121k 196 1 8W fxd film 19 6k 1 1 BW fxd film 51 1k 196 1 8W fxd film 1k 196 1 8W fxd film 200k 195 1 8W fxd film 121k 1 1 8W fxd film 1k 1 1 8W fxd film 121k 1 1 8W fxd film 1 5k 1 1 8W fxd film 13 3k 1 1 8W fxd film 121k 1 1 8W fxd film 30 1k 1 1 8W fxd film 4 12k 1 1 8W fxd film 13 3k 1 1 8W fxd film 42 2k 1 1 8W fxd film 133k 1 1 8W fxd film 825 1 1 8W fxd film 68 1k 1 1 8W fxd film 2 87k 1 1 8W var cermet 5k 10 fxd film 100k 1 1 8W fxd film 56 2k 1 1 8W fxd ww 15k 0 1 fxd film 19 6k 1 1 8W fxd film 4 12k 1 1 8W fxd film 121k 1 1 8W fxd film 56k 1 1 8W fxd film 68 1 1 1 8W fxd film 1k 1 1 8W fxd film 19 6k 1 1 8W var cermet 20k 10 Table 6 4 Replaceable Parts TO QI Qy NO P gt OOH NO MFR PART NO 2N2222A 2
46. age Let R 1000 values are from 0 to 0 999V programmable in 999 steps 3 The magnitude portion M is calculated by The resolution in this range is equal to 999V 999 or 1mV adding 1 to the desired negative or positive out per step To calculate the correct data word value to pro put voltage V and dividing this sum by the least duce the desired output within this range proceed as significant digit D The magnitude portion must follows be rounded off to exactly 3 digits 1 The resolution in the low range is 1mV M INT V 1 D 0 5 Let D 001 4 Combine range and rounded off magnitude pot 2 The range digit is 1 for the low range so add 1 tion to obtain the correct data word value N to the left of the 3 magnitude digits N R FM Let R 1000 Example desired voltage gt 0 5123V 3 The magnitude portion M is calculated by D 002 dividing the desired output voltage V by the R 1000 least significant digit D The magnitude portion M INT 5 123 1 002 0 5 must be rounded off to exactly 3 digits M INT 20 4877 002 0 5 M INT V D 1 0 5 3 magnitude digits M INT 243 85 0 5 4 Combine range and rounded off magnitude M INT 244 35 portion to obtain the correct data word value N N 1000 244 1244 N R FM in this example the desired output voltage is 0 5123V Example desired voltage 0 5123V but the actual output is 0 512V because the resolution is D 001 2mV 002 R 1000 V Mx D 1
47. agraph 3 72 3 76 USING 59501A AS A LOW LEVEL DC SIGNAL SOURCE 3 76 When used as a low level dc signal source 59501A output terminals A1 and A2 are connected directly to the user s device In this application power supply programming network terminals A3 through A6 are normally not used As described previously two programmable output ranges are available in the selected operating mode UNIPOLAR or BIPOLAR The output ranges available at terminals AT and A2 are as follows Range Unipolar Bipolar High O to 9 99V 10 to 9 98V low 0 to 0 999V 1 to 0 998V Unipolar Mode 3 78 Calibration The ZERO ADJUST allows the output is programmed to zero 2000 The D A FULL SCALE ADJUST allows the output to be adjusted to 9 99V X596 when the 59501A is programmed to maximum 2999 The 59501A is normally calibrated to provide a unipolar output range from OV to 9 99V The reason for this is that the 595014 is programmable in 999 steps and using this range results in a round number for resolution voltage change per step For example in the high range resolution is 9 99V 999 or 10mV per step If the output is set to 10V resolution is 10 999 or 10 01001mV per step Calibration procedures for operating in the unipolar mode are provided in paragraph 5 29 3 79 Sample Program A sample program 9825A calcu lator for controlling the unipolar output of the 595014 is given in example 8 The program includes a calibration routine and allow
48. ample Program Constant Voltage Bipolar Mode hl Ba TF Tairm wil i t EDters HE EED DERE gt T cm ps LIE a TAT dee Set VOLT med Pa Es CSR ent Ent iV CERA Lonnegct Enter Cugi paag too Woe STP LAAG Ed eed GER ta PF TAR rint EE NW FT Tie Bey fut deed sprei Faia daiat ib end Explanation 1 Sets fixed point format with three digits to the right of the decimal This allows for better accuracy in the adjustments specified in lines 7 and 11 2 3 Setup instructions 4 13 Calibration routine using VOLTAGE GAIN control on BPS A and the ZERO and D A FULL SCALE ADJUST controls on the 59501A Note that in line 10 an average value is calculated so that the adjustment can be completed in the minimum number of steps 14 15 BPS A output is programmed to zero Load is connected to BPS A output terminals 16 User inputs desired output voltage or on the keyboard 17 If voltage requested line 16 is too high Voltage too high appears on the display for three seconds and then the program returns to line 16 18 19 Proper range is selected and correct data word value N is calculated to represent the voltage requested 20 Data word N representing the requested output voltage or is sent to the 59501A Format f4 0 deletes leading spaces and z suppresses the carriage return line feed characters If leading spaces are not deleted and the CR LF characters are not suppressed the output will go to an
49. analog converter and analog amplifier circuits For simplification the 59501 A s bias voltage supplies and paral IE Qu f 7 1 FEES ern EIR IW MN LISTENING INPUT JINVERTERS 1 A Dd dV LISTEN LOGIC To From S ATN wil Lo y NFD ACCEPTOR CLOCK 4 HANDSHAKE i i x ISOLATORS i i i l d MO CLOCK DIOF4 DATA STORAGE SEQUENCER LOAD DIGITAL PROCESSING CHARACTER DATA CIRCUITS STORAGE MAGNI 12 MAN 2 RANGE RH vVN o lol n a MAGNITUDE DATA 12 BITS BCD BEER eni ai ed CONVERTER a 7E Turn ON i RO TURN OFF ADJUST CONTROL l i ANALOG AMPLIFIER CIRCUITS 1 Y as si Ep HRN Me Figure 4 1 59501A Block Diagram 4 3 Digital Processing Circuits 4 4 The 59501A responds to the ATN attention and IFC interface clear control signals as well as the data on lines DIOT DIO7 The 59501A also receives the DAV data valid handshake signal from the bus and sends the NRFD not ready for data and NDAC data not accepted handshake signals to the bus A 3 wire hand shake seguence is used to control the transfer of each character on the bus This process allows devices with different input output speeds to be nterconnected to the HP IB The character transfer rate automatically adjusts to the siowest device Th
50. aximum output current Voltage reading on DVM must be converted to the equivalent output current c Program 59501 A to 2000 and set ZERO ADJUST on 59501 A for zero output current Note that for power supply models 6427 6483 zero current may not be attainable When cali brating the CC output of one of these supplies choose a convenient point e g 1096 or 2096 of maximum output and set ZERO ADJUST to obtain this value Data words 2100 and 2260 correspond to the 10 and 2096 output points respectively d Program 59501 A to 2999 and set POWER SUPPLY FULL SCALE FINE ADJUST on 59501 A for desired maximum output current 3 15 337 If necessary use D A FULL SCALE ADJUST to obtain the required resolution e Turn off supply and open output terminals Turn on supply f Adjust power supply s VOLTAGE control for the desired maximum output voltage If a load change causes this voltage limit to be exceeded the supply automatically crosses over to con stant voltage operation at this voltage limit point and the output current drops propor tionally H desired the front panel VOLTAGE control can be disabled and replaced with a fixed resistor of proper value see applicable power supply Operating and Service manual 3 74 Sampie Program The sample program provided in example 6 can easily be modified for CC programming by substituting current for V voltage and by monitoring the output current using the test setup of par
51. ble connector contains standard mating screws silver make a conversion using the hardware and instructions included in Metric Conversion Kit 5060 01 38 2 19 The HP IB cables use the same piggyback con nector on both ends Up to three connectors may be stacked one upon another As many as 15 instruments including the controller may be connected to the same HP 1B 2 20 System Connections 2 21 Figure 2 3 illustrates a controller e g a 9825A calculator and a 59501A unit connected to the HP IB In this case the 98034 A interface card provides HP IB capa bility for the 9825A calculator and is installed in any one of the three slots in the rear of the calculator The 98034 A card is eguipped with the proper cable and connector to mate with the HP IB connector on the rear of the 59501A Note that specific connections between the 59501 A s output ter minals and the user s device e g programmable power supply 2 2 P O TWISTED PAIR WITH 10 P O TWISTED PAIR WITH 9 P O TWISTED PAIR WITH 8 P O TWISTED PAIR WITH 7 P O TWISTED PAIR WITH 6 REN D108 DIO DIO6 DIO5 SIGNAL GROUND TWISTED PAIR WITH EI NOTE TYPE 57 MICRO RIBBON CONNECTOR AMPHENOL OR CINCH X SIGNAL GROUND NOT PROCESSED BY 5950IA HP IB LOGIC LEVELS GROUND TRUE TTL COMPATIBLE INPUT LEVELS FROM HP IB TRUE lt O 8V p FALSE 2 0V OUTPUT LEVELS TO HP IB I TRUE x OVDC TO O 4VDC FALSE z 2
52. can be programmed using an external voltage with a voltage gain dependent upon the ratio of Rp to Rp Note that this method is no different from the circuit normally used for constant voltage control of the output except that an external reference the pro gramming voltage source has been substituted for the internal reference On most supplies external terminals are available so that the connections shown in Figure 3 4 can be accomplished without any internal wiring changes In all HP remotely programmable power supplies the summing point S is made available and the configuration of Figure 3 4 can always be accomplished using the external programming voltage source Ep and external precision wire wound resistors Rp and Rp Re should not exceed 10k As indicated by the equation in Figure 3 4 Rp can be selected so that the resulting voltage gain is either fess or greater than unity It is possible to use the front panel contro on the supply as the voltage gain control Rp 3 5 E CHOOSE EE gt Ip NORMAL SERIES REGULATOR COMPARISON AMPL RP Eour KvEp G P Figure 3 4 Voltage Programming with Variable Voltage Gain 342 Constant Voltage Figure 3 5 illustrates the con nections required for the 59501A to program the constant voltage CV output of a typical HP power supply Note the similarities between Figures 3 4 and 3 5 The 59501A includes Rp R76 Rp COARSE and FINE POWER SUPPLY FULL SCALE ADJUST and Ep 595
53. ch Corp 82389 Switchcraft Inc Chicago lil Burbank Calif 82647 Metals and Controls Inc Attleboro Mass Renbrandt Inc Boston Mass Use Code 71785 assigned to Cinch Mfg Co Chicago III 6 4 REF DESIG DESCRIPTION C1 C2 5 C6 C7 C8 C9 10 C11 15 C16 17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 32 C33 34 C35 36 C37 38 C39 C40 C41 CRI 2 CR3 CR4 7 CR8 CR9 CR10 CR11 CR12 13 CR14 17 CR18 CR19 22 J1 Q1 Q2 os O4 Q5 Q6 Q7 9 Tabie 6 4 Replaceabie Parts Main Board Assembly See Note 1 fxd cer 1000pF 1kV fxd cer 0 01uF 100V fxd mica 500pF 1 300V fxd cer 0 01uF 100V fxd cer 470pF 1096 1000WVdc fxd mica 91pF 196 300V fxd cer 0 01uF 100V fxd cer O 1uF 50V fxd mica 100pF 1096 500V Not assigned fxd mica 30pF 596 500V fxd mica 390pF 5 300V fxd cer 0 015uF 80 20 1kV fxd cer 1uF 2096 25V fxd mica 30pF 5 500V fxd cer 1uF 20 25V fxd cer 0 01uF 100V fxd elect 2000uF 20V fxd cer O tu F 50V fxd elect 22uF 1096 15V fxd elect 1uF 1096 35V fxd elect 180uF 50V fxd cer O 1uF 50V fxd mica 1500pF 5 300WVdc fxd elect 10uF 1096 20V fxd elect 1uF 1096 35V fxd mica 47pF 596 500V fxd mica 56pF 596 300V Diode Si 200mA 75V Stabistor 15V 150mA Diode Si 200mA 75V Diode Schottky Diode power rectifier Diode Schottky Diode powe
54. de power supply errors Specified at 23 C 5 C High Low 0596M 25 P 0 1 M 25 P Unipolar Bipolar 0196M 2596P 0296M 25 P Isolation 600Vdc between HP 1B data lines and output terminals Temperature Coefficient High 00596M C 015 P C Low 0196M C 0159P C Programming Resolution High Low 0 1 M 0 2 M Unipolar Bipolar 0 01 M 0 02 M Programming Speed D A Conversion Time plus the programming speed of the power supply GENERAL Input Power Unit has ac power module which is settable to 100 120 220 240Vac 1396 6 48 63Hz 10VA A 3 wire detachable line cord is supplied Temperature Range Operating Oto 55 C Storage 40to 75 C Dimensions See Figure 2 1 Weight Net 1 36kg 3 Ib Shipping 1 81kg 4 Ib SECTION H INSTALLATION 2 1 INITIAL INSPECTION 2 11 Outline Drawing 2 2 Before shipment this instrument was inspected 2 12 Figure 2 1 illustrates the outline shape and and found to be free of mechanical and electrical defects As soon as the instrument is received proceed as instructed in the following paragraphs 2 3 Mechanical Check 2 4 ask the carrier s agent to be present when the instrument is unpacked Check the instrument for external damage such as broken switches or connectors and dents or scratches on the panel surfaces If the instrument is damaged file a claim with the carrier s agent and notify your local Hewlett Packard Sale
55. e Carbon Co St Marys Pa Radio Materials Co Chicago III 78526 Stanwyck Winding Div San Fernando Augat Inc Attleboro Mass Electric Mfg Co Inc Newburgh N Y Dale Electronics Inc Columbus Neb 78553 Tinnerman Products Inc Cleveland Ohio Eico Corp Willow Grove Pa 78584 Stewart Stamping Corp Yonkers N Y Honeywell Inc Freeport lil 79136 Waldes Kohinoor Inc LEG N Y Whitso Inc Schiller Pk HI 79307 Whitehead Metals Inc New York N Y Sylvania Electric Prod Woburn Mass 79727 Continentaf Wirt Electronics Corp Essex Wire Corp Mansfield Ohio Philadelphia Pa Raytheon Co Ouincy Mass 79963 Zierick Mfg Co Mt Kisco N Y Wagner Electric Corp Livingston N J 80031 Mepco Morristown N J Southco inc Lester Pa 80294 Bourns inc Riverside Calif Leecraft Mfg Co Inc L I C N Y 81042 Howard Industries Racine Wisc Methode Mfg Co Rolling Meadows ill 81073 Grayhill Inc La Grange Ill Bendix Corp Franklin Ind 81483 International Rectifier EI Segundo Calif Weckesser Co Inc Chicago ill 81751 Columbus Electronics Yonkers N Y Amphenol Corp Janesville Wis 82099 Goodyear Sundries amp Mechanical Co Inc Industrial Retaining Ring Co New York N Y irvington N J 82142 Airco Speer Electronic Components IMC Magnetics Corp Westbury N Y f Du Bois Pa Sealectro Corp Mamaroneck N Y 82219 Sylvania Electric Products Inc ETC Inc Cleveland Ohio Emporium Pa International Electronic Resear
56. e acceptor handshake circuit implements the 3 wire handshake cycle that occurs with each command or data character received on data lines DIO1 DIO7 The 59501A transfer rate is approximately 17usec per character The 59501A is programmed by a data word consisting of four consecutive characters digits thus a data word is transferred to the 59501A in approxi mately 68usec 4 5 Data lines D101 D107 accommodate the 7 bits 1 character of the ASCII code Each character s trans ferred onto the bus one at atime The state of the ATN line determines how the data lines are interpreted The ATN line is constantly monitored by the 59501A and all other bus devices When ATN is true the bus devices interpret the data as instructions commands from the controller The 59501A recognizes two commands its listen address suggested listen address is amp and the unlisten command 4 6 When AFN is true and the 59501A s listen address is placed on data lines DIOT DIO7 the 59501A is enabled to function as a listener As shown in Figure 4 1 the data lines are applied to the address comparator and to the listen logic The address comparator decodes the b9501A s listen address when the levels on lines DIOT DIO5 match the address switch settings on the rear of the 59501A In this case the address switches are set to amp one of 31 possible address codes which distinguishes the 59501A from the other devices connected to the bus Thus
57. e connections reguired to program the output voltage or current of various HP supplies are described in paragraphs 3 37 through 3 74 When the 59501 A is used as a low level dc signal source only terminals A1 and A2 are connected to the user s device Programming instructions for this application are given in paragraphs 3 75 through 3 82 3 17 PROGRAMMING FUNDAMENTALS 3 18 The unipolar or bipolar output of the 59501A is programmed by a data word comprised of four ASCH characters digits received in the order shown below The first digit specifies range and the next three digits specify the desired output within the selected range The range digit must be the number 1 to specify low range or the number 2 to specify high range The magnitude digits can be an number from 000 to 999 D2 D3 D4 D1 MR ad Range Magnitude tor 000 999 3 19 The 59501A automatically provides an output voltage as soon as the four digits are received This output is retained until the next four digits are received The 59501 A is programmed by the magnitude digits in BCD to produce the desired output voltage In the unipolar mode 000 equals 00 0 of full range 500 equals 50 0 of full 3 2 ADDRESS SWITCH OUTPUT HP 18 CONNECTOR MODULE Figure 3 2 59501A Rear Panel POWER SUPPLY D A OUT PUT PROGRAMMING NETWORK TO VOLTAGE PROGRAMMING TERMINALS ON TYPICAL HP POWER SUPPLY Figure 3 3 Rear Terminal Strip Typical
58. e that only those circuits not covered in sufficient detail in the preceding overall description will be described Throughout this discussion refer to the fold out schematic diagram at the rear of this manual 4 18 Power On Preset 4 19 When power is initially applied the preset circuit O3 U1 U5 generates a LO level pulse PON which resets the listen flip flop acceptor handshake and the data storage sequencer Thus the preset circuit ensures that the 59501A is not a listener and is properly initialized when power is appiied 4 20 Address Comparator 4 21 The address comparator consists of 5 bit comparator U3 and the address switches on the rear of the supply When the levels on data lines DIOT DIOS match the address switch settings U3 provides a HI level ADDRESS output to the listen logic Note that the schematic illustrates the address switches set to the suggested listen address of amp 4 22 Acceptor Handshake 4 23 The acceptor handshake circuit implements the 3 wire handshake cycle that occurs with each command or 4 3 data character received on the bus data lines DIO1 DIO7 Unrecognized command characters e g talk address will be ignored but the handshake cycle between the controller and the 59501A will occur anyway The 3 wire handshake lines are designated DAV data valid NRFD not ready for data and NDAC data not accepted The acceptor handshake circuit is enabled when the bus is in the command
59. ead to the A1 output terminal 5 9 TROUBLESHOOTING 5 10 The troubleshooting procedures Figures 5 2 through 5 4 assume that the controlier is operating properly and that a malfunction exists in the 59501A Before attempting to troubleshoot the 59501A ensure that the fault was not caused by a programming error Also it is recommended that the reader review the circuit descriptions provided in Section IV A good understanding of circuit operation will aid in troubleshooting In order to troubleshoot the 59501A the bottom cover must be removed Table 5 1 Test Eguipment Reguired Digital Voltmeter Accuracy 0 004 Bandwidth dc to 50MHz Logic Probe TTL CMOS Logic Probe impedance 2502 Trigger Thresh 2 0V and 0 8V nom fin Pulse Width 10nsec Precision de voltage measurements HP Model 3455A or 3490A Use Adjust zero output accuracy Check handshake cycle timing CMOS logic circuit troubleshooting TTL logic circuit troubleshooting TTL CMOS logic circuit HP 545A troubleshooting 5 1 HP Model 180C with 1803A and 1821A plug ins HP 10525T CONNECT TEST SET ue OF FARA 5 68 1 FO UNIPOLAR APPLY SEND DATA WORD POWER PO THE 2999 CHECK vo 59501 ON DYM PERFORM ADJUST MENT PROCEDURES PARA 5 19 if AD JUSTMENT PPO CEDURES CO NOT WORK PERFORM SH POWER ON CHECK OUTPUT VOLT AGE V READING ON CV
60. eading of 0 999V 0 1m V on DVM e Check the zero programming accuracy para graph 5 24 steps a through e and the full scale program ming accuracy steps a through d above and repeat both procedures if required 5 26 Bipolar Mode Zero Programming Accuracy Use the same test setup as described in paragraph 5 23 a Perform steps 5 24a through 5 24e b Set mode switch on rear of 59507A to BIPOLAR c Program 59501A to Listen and alternately send data words 1500 OV low range and 2500 OV high range d Adjust potentiometer A1 R26 bipolar zero balance for a straight line as indicated on the scope 5 27 Front Panel Adjustments 5 28 After the unit is calibrated the front panel controls are adjusted for unipolar or bipolar operation Note that the following procedures adjust the output of the 59501A when it is to be used as a DAC If the 59501A is to be used as a power supply programmer follow the calibration procedures provided in Section IH paragraphs 3 53 through 3 68 5 29 Unipolar Mode Use the same test setup as paragraph 5 23 except connect a DVM between the A1 and A2 output terminals Connect the DVM common to the A2 terminal a Set mode switch to UNIPOLAR b Program 59501A to Listen Send data word 2606 high range zero and adjust front panel ZERO ADJUST for a reading of OV 20 1mV on DVM c Send data word 29997 high range full scale and adjust front panel D A FULL SCALE ADJUST for a read
61. entral Screw Co Chicago lil 76385 Minor Rubber Co Inc Bloomfield NJ 76487 James Millen Mfg Co Inc Malden Mass Gavitt Wire and Cable Brookfield Mass Grant Pulley and Hardware Co 76493 JW Miller Co Compton Calif West Nyack N Y 76530 Cinch City of Industry Calif Burroughs Corp Plainfield N J 76854 Oak Mfg Co Div of Oak Electro U S Radium Corp Morristown N J Netics Corp Crystal Lake HI Yardeny Laboratories New York N Y 77068 Bendix Corp Electrodynamics Div Arco Electronics Inc Great Neck N Y No Hollywood Calif TRW Capacitor Div Ogallaia Neb 77122 Palnut Co Mountainside N J RCA Corp Harrison N J 77147 Patton MacGuyer Co Providence R 1 Rummel Fibre Co Newark N J 77221 Phaostron Instrument and Electronic Co Marco amp Oak Industries Anaheim Calif South Pasadena Calif Philco Corp Lansdale Pa 77292 Philadelphia Steel and Wire Corp Philadelphia Pa 77342 American Machine and Foundry Co Princeton Ind 77630 TRW Electronic Components Div Stockwell Rubber Co Philadelphia Pa Tower Olschan Corp Bridgeport Conn Cutler Hammer Inc Lincoln HI Litton Precision Products Inc USECO Van Nuys Calif Camden N J Gulton Industries Inc Metuchen N J 77764 Resistance Products Co Harrisburg Pa United Car Inc Chicago Ill 78189 lllinois Tool Works inc Elgin HI Miller Dial and Nameplate Co 78452 Everlook Chicago Inc Chicago lll EI Monte Calif 78488 Stackpol
62. equal height and depth All rack mounting accessories for this unit are listed in paragraph 1 11 Also complete installation instructions are included with each rack mounting kit 2 15 Eguipment Reguired 2 16 If an HP calculator is used to program the 59501A the following equipment is required HP RR Calculator I O Card Package 59405A Option 0207 HP 1B I O 59405A Option 021 HP IB O 98034A HP IB i O General 1 O Extended I O 59405A Option 030 HP IB O a includes Peripheral Control H ROM includes Extended I O ROM if an HP 2100 series computer is used as the controller the 59310B HP IB Computer Interface card is reguired lt 2 17 HP IB Connector 2 19 The HP IB connector on the rear of the 59501A interfaces directly to the HP IB Figure 2 2 illustrates the pin configuration of the HP 1B connector which is a 24 pin TERMINAL STRIP PETAL eg AEW i 0 44 CTR TO CTR r 9 94 125 8 mmi Ja Sma _ d rd e i270 4 8 38 212 9mm 3 49 488 7 min i i 050 1 12 7 mm Figure 2 1 59501A Outline Drawing type 57 micro ribbon connector One HP IB cable is supplied with each HP computer and calculator 1 O card package Extra cables may be ordered separately HP IB Cable Model No Cable Length 10631A 1m 3 3 ft 10631B 2m 6 6 ft 10631C 4m 13 2 ft NOTE The HP IB connector supplied with this unit contains metric fasteners colored black If your HP IB ca
63. ff circuit to go HI this signat is significant only when power is initially applied and the first data word is loaded see paragraph 4 51 The O4 output is fed back to the shift register input U25 6 through OR gate U28 and delay circuit C10 R22 resetting the shift register 01 04 outputs go LO For this condition the data input U25 7 is HI initializing the shift register for the next data word transfer 4 34 The range latch output U26 14 is LO if high range was programmed and HI if low range was programmed The range output controls the range switch in the analog amplifier circuits 4 35 The magnitude outputs of 4 bit storage latches U21 U23 are applied to the digital to analog converter DAC U29 The DAC is programmed in BCD Each 4 bit storage latch contains a number 0 9 Thus the three latches can provide an output from 000 999 The latch outputs are connected to the DAC input in the proper order i e U21 contains the most significant bits etc The data storage 2 outputs are retained until a new data word is transferred from the bus 4 36 Digital to Analog Converter DAC and I V Converter 4 37 The DAC U29 converts the 12 bit BCD input 3 magnitude digits into an output current The DAC output range 0 2mA nominal corresponds to a BCD input range of 000 099 The DAC output U29 9 is applied to the inverting input of operational amplifier U30 current to voltage converter The UNIPOLAR BIPOLAR switch S
64. for 3 1 2 high support shelf 1494 0015 Slide kit for support shelves mounted in HP rack enclosures 1 13 INSTRUMENT AND MANUAL IDENTIFICATION 1 14 Hewlett Packard instruments are identified by a two part serial number The first part is the serial number prefix a number letter combination that denotes the date of a significant design change and the country of manufac ture The first two digits indicate the year 10 1970 11 1971 etc the second two digits indicate the week and the letter A designates the U S A as the country of manufacture The second part is the instrument serial number a different sequential number is assigned to each instrument starting with 00101 1 15 If the serial number on your instrument does not agree with those on the title page of the manual Change Sheets supplied with the manual of Manual Backdating Changes define the difference between your instrument and the instrument described by this manual 1 16 ORDERING ADDITIONAL MANUALS 1 17 One manual is shipped with each instrument Additional manuals may be purchased from your local Hewlett Packard field office see the list at the rear of this manual for addresses Specify the model number serial number prefix and the HP Part Number provided on the title page Table 1 1 Specifications Model 59501A D A CONVERTER DC Output Voltage Programmable in high or low ranges within the voltage limits shown below Output mode is unipolar
65. ftto116D0 2 LZERO 2 Fog AT 2A2 weyle 4 3 3 FnRMATC SET ZERQ ADJUST FUR my PASE wmRYTTECOL16b 2 IFULL ATI LE 1 4 4 FhgMAT SET D A FS ADJ FAK S9 Seov CORRESPOND WITH PAUSE MM TE wP T TE 1 63 l Er PnRMATC ENTER DESIRED VULTAGE TO 9 99V RE AU m 7 v 7 FnRMATCFD 3 Da 44 lose IFY LTV IRU TO 12 IF Y 6T 9 9O JGO TO 14 LF EVeGTeeBYO Da ew vsiFTX V Ue 5 LF VY eGT e990 IRS2H2 wbr E 1186b 6 IR Iv OP cn 8 PORMAT AL 1 34 Gn TU s 12 wRITE S 3 14 FngMAT NU NEGATIVE voLTauES Gn TO B 14 ETTER 158 io FnaMAT VULIAGE TUO HIGH on TO 5 END amp ND FRRUPSS 3 18 SECTION IV PRINCIPLES OF OPERATION 4 1 OVERALL DESCRIPTION power on preset circuit are not shown on the block diagram The 59501 A s circuits are shown in their entirety on the 4 2 The 59501A provides a unipolar or bipolar output main schematic Figure 7 3 at the rear of the manual The voltage in response to digital data received on the HP IB functional circuit designations are the same on both the As stated previously the 59501A can be used in conjunc block diagram and the schematic so that the two diagrams tion with an HP IB controller as a power supply program can be correlated As shown in Figure 4 1 the major mer or as a low level dc signal source Figure 4 1 is a block circuits of the 59501A consist of digital processing circuits diagram illustrating the major circuits within the 59501A a digitai to
66. he AT board see Figure 7 b Connect oscilloscope to the A1 and A2 output terminals on rear of 59501A Connect scope common to the A1 terminal Set Time Div to 1msec div and Volt Div to 1mV cm c Check that the address switches on the rear of the 59501A are set to amp 5 d Connect the 59501 A to an HP IB controller e Apply power to 59501A and controller Allow a 30 minute warmup 5 24 Unipolar Mode Zero Programming Accuracy To adjust the zero programming accuracy in the high and low output ranges proceed as follows a Set mode switch on rear of 59501A to UNIPOLAR b Program 59501A to Listen and alternately send data words 1000 zero low range and 2000 zero high range c Adjust potentiometer A1R61 unipolar zero balance for a straight line as indicated on the scope d Remove scope and connect a DVM between the A1 and A2 output terminals Connect DVM common to A1 e Send data word 2000 to the 59501 A f Adjust front panel ZERO ADJUST for a reading of OV 1mV on DVM e 5 25 Unipolar Mode Full Scale Programming Accuracy To adjust the full scale programming accuracy in the high and low ranges proceed as follows a Send data word 2999 7 high range full scale to the 595014 b Adjust D A FULL SCALE ADJUST for reading of 9 99V 1mV on DVM c Send data word 1999 low range full scale to the 59501 A d Adjust potentiometer A1R49 iow range gain for a r
67. he magnitude digits are 999 A OV V 244 x 02 10 output is obtained when the magnitude digits are 500 V 4 88 10 Resolution in this range is equal to 1 998 999 or 2mV To V 5 12V calculate the correct data word value to produce the desired 3 3 3 29 Sending Data Words 3 30 Before a data word is sent a command must be issued establishing the controller as the talker and the 59501 A as the listener The following examples assume that the controller 9830A or 9825A calculator has been assigned its standard talk and listen addresses of U and 5 respectively and the 59501 A has been assigned a listen address of amp 3 31 Example 1 illustrates a command statement 9830A calculator containing the proper talk and listen addresses The statement includes the constant data word value 1250 which is sent to the b9501A Example 1 Sending a Constant Data Value 9830A Command Statement 59501 A Listen Address Calculator Talk Address Unlisten Command Range Digit Magnitude Digits CMD FUR 1250 Data Word 3 32 Example 2 illustrates a command statement issued by a 9825A calculator Note that in addition to the calcu lator talk address U and the 59501A listen address amp the address code of the HP IB Interface Card 98034A must be included It is assumed that the interface card has been assigned its standard select code of 7 The 9825A command statement also includes a
68. ing of 9 99V TmV on DVM 5 30 Bipolar Mode Use same test setup as above a Set mode switch to BIPOLAR b Send data word 2000 and adjust ZERO ADJUST for a reading of 10V 1mV on DVM c Send data word 2999 and adjust D A FULL SCALE ADJUST for a reading of 9 98V 21mV on DVM d Repeat steps b and c Table 6 3 Code List of Manufacturers CODE MANUFACTURER ADDRESS Delco Radio Div of General Motors Corp Kokomo ind Atlantic Semiconductors Inc Asbury Park N J Fairchild Camera and Instrument Corp Mountain View Caiif Daven Div Thomas A Edison industries McGraw Edison Co Orange NJ Signetics Corp Sunnyvale Calif Bendix Corp The Navigation and Control Div Teterboro N J Electra Midiand Corp l Minera Weils Texas Fansteel Metallurgical Corp No Chicago Hi Union Carbide Corp Electronics Div Mountain View Calif UID Electronics Corp Hollywood Fla Pamotor Inc Pampa Texas General Electric Co Schenectady N Y General Electric Co Nela Park Cleveland Ohio General Radio Co West Concord Mass LTV Electrosystems Inc Memcor Com ponents Operations Huntington Ind Dynacool Mfg Co Inc Saugerties N Y National Semiconductor Corp Santa Clara Calif Hewlett Packard Co Palo Aito Calif Heyman Mfg Co Kenilworth N J IMC Magnetics Corp Rochester N H SAE Advance Packaging Inc Santa Ana Calif Budwig Mfg Co Ram
69. ional circuit areas identified on Figure 7 2 correspond with the schematic 7 5 SCHEMATIC DIAGRAMS 7 6 The schematic diagram for Mode 59501A Figure 7 3 consists of two sheets Sheet 1 illustrates the ac input circuit and the bias voltage supplies Schematic notes are aiso included on sheet 1 Sheet 2 illustrates the digital processing and analog output circuits ADDRESS SWITCH 7 AIS y w Y e POWER SUPPLY FULL SCALE ADJ O 0O 6 UNIPOLAR eo e M Tm mj lt s ses LISTENING Figure 7 1 Bottom View Cover Removed 7 1 Adidas G34V 10934 AG T PERE ENE EE ages Mh tnit 4 ge d i E A J 1 eo 3 9 E 1 E eu ss 8 I H bai me E Es W j J arad i HEF YHA TdWY Fee shone M p Ta pyaapypwapiysaapasi L7 skud MOWN LSIUOY O4FZ TINY LADO Ord NO NafL Qd a EE EE ME TE SE ET RE EL INTIS 2 t 7E aaa pea v ATdd NS saree RAMs daai moi y ca ee EO lat Az CY NASH yr Figure 7 2 Main Board Assembly A1 Component Location 7 2 P O AL MAIN BOARD ASSEMBLY EV UNREG NOTE tO ER _ I j i as t5V FUSE Ft iS 25mA FOR IOO 2OVAC INPUT OR 62 SmA FOR 220 2ROVA INPUT w 5V XX INPUT VOLTAGE CHOICE AVAILABLE CN EACH END AND oti BOTH SIDES OF P C BOARD VOLTAGE 5 SELECTED BY ost OR
70. is one tenth of the corresponding high range output Variable resistor R49 allows a low range gain adjustment while the front panel D A FULL SCALE ADJUST control R2 allows setting the maximum rated 59501A output 2596 in the high and low ranges 4 42 Transistor siages Q3 and O4 provide a voltage gain for the low level output 1V max of operational amplifier U31 Stages O10 positive and Q11 negative provide the unipolar or bipolar output voltage between terminals At and A2 Output current up to 10mA is available and is automatically limited to 17mA nominal When terminal A1 is negative with respect to load current will flow through the Q11 stage When terminal A1 is positive with respect to x load current will flow through the O10 stage 4 43 Diodes CR9 and CR11 protect the output amplifier if an external voltage exceeding 25V nominal is connected between the AT and A2 terminals If an excessive negative voltage is applied CR9 wil clamp the output to 25V nom If an excessive positive voltage is applied CR11 will clamp the output to 25V nom 4 44 Range Switch 4 45 The range switch allows the output amplifier to produce a high range or a low range output The range switch circuit O5 O6 receives the RANGE signal level from range latch U26 14 A LO signal level specifies high range while a HI signal level specifies low range 4 6 4 46 If a LO level is received transistor Q6 is turned off causing FET
71. lculator when checking or troubleshooting the 59501A The 59401A provides talker listener and controller modes of operation The operating speed of the 59401A varies from one character at a time in the halt mode to two characters per second in the slow mode and full HP IB speed in the fast mode Thus the 59401A can be used to exercise the 59501A circuitry allow ing one character at a time to be transferred and checked 5 6 CHECKOUT PROCEDURES 5 7 The procedures given in the flow chart of Figure 5 1 can be used to check operation of the B9501 A when it is initially received If a malfunction s detected during checkout the procedures determine whether adjustment or troubleshooting is required The procedures in Figure 5 1 provide the following checks 1 Output voltage is held near OV when power is applied 2 Listen logic is enabled when the 59501 A s listen address is received 3 Listen logic is disabled when the interface clear IFC signal is received 4 Unipolar mode zero output programming accuracy 5 Unipolar mode full scale programming accuracy 6 Bipolar mode full scale programming accuracy 7 Listen logic is disabled when the Unlisten command is received 5 8 The checkout procedures are performed with the 59501A connected to the HP IB along with a controller The 59501 A s address switches are set to B anda DVM is connected between the A1 and A2 output terminals Connect the DVM common l
72. le 10 assumes the following RTE HP IB configuration 1 The HP IB computer interface card HP 59310B is assigned logical unit number 14 16 octal 2 The HP IB RTE Driver DVR 37 was generated in the RTE system see DVR Programming and Operating Manual HP Part No 59310 90063 to provide auto addressing capability Thus each time a data transfer is directed to the HP IB the driver automatically supplies the correct HP IB Talk Listen addresses and then transfers the indicated data to the 59501A 3 The user is interacting with the program via the system console logical unit number 1 3 86 itis important to note that the driver is called in the program using formatted WRITE statements in such a way as to assure that only the appropriate four programming digits are output to the 59501A via the HP IB The range digit IR is output using an A1 specification while the three magnitude digits are output using the 13 specification after the desired voltage value is intergerized to the appropriate value Also the HP IB driver is called to implement a transparent binary data write function 2116B which is required in order to suppress carriage return line feed characters fram being output by the driver Example 10 2100 Series Computer Sample Program 59501A Unipolar Output FTNA L Pprabkam TS UTMENSION i7EROL2D IFULL 2 DATA TZEROTPULL 2H20 2H00 2H29 2H99 C uNTPOULA VOLTAGE OUTPUT 595014 WETTE Coe 43 i PnRAAT SET 5950iA TO UNTPOL AR Paust wer
73. m full wave rectifier CR19 CR22 and filer C31 C34 Note that the 15 and 15V unregulated outputs 25V and 25V nominal are also applied to voltage protection diodes CR9 and CR11 see paragraph 4 43 iC U33 provides regulated 15V outputs with respect to W for the DAC and the analog amplifier circuits 4 57 The Vdd bias supply O3 develops its output from the F15V supply Vdd BV referenced to is distri buted to all CMOS logic circuits on the WV side of the photo isolators Note that power supply ground WV and output ground WV are connected together SECTION V MAINTENANCE 5 1 INTRODUCTION 5 2 This section contains checkout troubleshooting repair and replacement and adjustment procedures for the 59501A The checkout procedures verify that the 59501 A circuitry is operating properly by checking that it can be programmed by an HP 1B controller and that it is properly adjusted The troubleshooting procedures are performed if a maifunction occurs while performing the checkout pro cedures or during normal operations 5 3 TEST EQUIPMENT REQUIRED 5 4 The controller e g 9825A or 9830A calculator equipped with the appropriate bus interface card provides all of the signal inputs necessary for checking and troubie shooting the 59501A The additional instruments required for troubleshooting are listed in Table 5 1 5 5 if available Bus System Analyzer HP Model 59401A can be used in place of the ca
74. ntic Conn 72619 Dialight Corp Brooklyn N Y 72699 General Instrument Corp Newark N J 72765 Drake Mfg Co Harwood Heights lli 72962 Elastic Stop Nut Div of Amerace Esna Corp Union N J 72982 Erie Technological Products Erie Pa 73096 Hart Mfg Co Hartford Conn 73138 Beckman Instruments Fullerton Calif 73168 Fenwal inc Ashiand Mass 73293 Hughes Aircraft Co Electron Dynamics Div Torrance Calif 73445 Amperex Electronic Hicksville N Y 73506 Bradley Semiconductor Corp New Haven Conn 73559 Carling Electric Inc Hartford Conn 73734 Federal Screw Products Inc Chicago HI 74193 Heinemann Electric Co Trenton N J 74545 Hubbell Harvey inc Bridgeport Conn 74868 Amphenol Corp Amphenol RF Div Danbury Conn 74970 E F Johnson Co Waseca Minn Table 6 3 Code List of Manufacturers CODE MANUFACTURER ADDRESS CODE MANUFACTURER ADDRESS 79042 IRC Div of TRW Inc Philadelphia Pa 82866 Research Products Corp Madison Wisc 75183 Howard B Jones Div of Cinch Rotron Inc Woodstock N Y Mtg Corp New York N Y Vector Electronic Co Giendaie Calif 75376 Kurz and Kasch Ine Dayton Ohio Carr Fastener Co Cambridge Mass 75382 Kitka Electric Corp Mt Vernon N Y Victory Engineering Springfield N J 75915 Littlefuse inc Des Plaines HI Bendix Corp Eatontown N J 76381 Minnesota Mining and Mfg Co Herman H Smith Inc Brooklyn N Y St Paul Minn C
75. nual Most of the supplies are programmed utilizing the connection diagram of Figure 3 12 The specific connections for each supply are tabulated on the diagram In af cases Figures 3 12 through 3 17 the 59501 A s programming output voltage is substituted for the supply s internal reference and the 59501 A s POWER SUPPLY FULL SCALE ADJUST potentiometers replace the supply s front panel CURRENT control COMPARISON AMPL SUPPLY FULL SCALE I ADJUST ER 7 MODEL NO 6OO2A x 6200B O18 O2B 038 O78 O9B 208 248 268 6 253A 55A 62566 595 608 618 638 64B 65B 668 688 695 7 B 74B i 6281A 84A 89A 94A 99A 6282A 85A 86A SOA STA AB AT a SA AND N DA EE PEL AN IF THE 6002A 1 EQUIPPED WITH OPTION OOI THE MODE SWITCH ON THE 6002A MUST BE SET TO CV OR LOCAL Figure 3 12 CC Programming Connections for HP Power Supply Models with S Common 3 9 NOTE The dotted line connections represent jumpers which must be removed Al other jumpers must be installed HP POWER SUPPLY 61044 6I05A 6114A OR 615A 595014 LA a5 4RE cc COMPARISON i AMPLIFIER i CURRENT r i l i l i i Figure 3 13 CC Programming Connections for HP Power Supply Models 6104A 6105A 6114A and 6115A HP CONSTANT CURRENT SOURCE _ 6177C 6I BIC OR 61860 xx x RESISTOR AIR35 6177C 61
76. of the ACDS U11 4 signal produces a negative pulse U12 8 which sets the DAC F F U8 11 goes HI and U9 6 goes LO With U9 6 LO NDAC J1 8 goes HI indicating that the B9501A has accepted the data T4 The controller sensing NDAC HI sets DAV Hi indicating that the data on the bus is no longer valid Tg When DAV goes HI the DAC F F is reset U9 6 goes HI and U8 11 goes LO causing NDAC J1 8 to go LO data not accepted Also with DAV HI NRFD goes HI indicating that the 59501A is ready for the next character Tg With NRFD HI the controller sets DAV LO and the next character is transferred T2 through T5 CHARACTER PRESENT AA WA i DATA LINES DIO1 DIO7 DAV 41 6 NRFD Jf 7 NDAC J1 8 ACDS AIUII 13 ACDS CAIUIL 4 AlUI2 8 POS EDGE DETECTOR AUS i F F Figure 4 2 Acceptor Handshake Signals Timing Diagram 4 24 Listen Logic 4 25 The listen logic consists of logic gates which set or reset the listen flip flop When the listen flip flop is set the 59501A is enabled to function as a listener The listen logic is enabled when the HP IB is in the command mode ATN is LO If ATN is LO and the 59501A s listen address is decoded ADDRESS is HI the listen flip flop is set U12 3 goes HI when ACDS is received from the acceptor handshake circuit Note that only a portion of the listen address is specified by the ADDRESS signal In addi tion HP IB data input line D
77. of the PC board is changed 2 30 Power Cable 231 This unit is factory eguipped with a power cord plug that is the most appropriate for the user s location 2 4 The replaceable parts section of this manual lists all of the power cords associated with this unit 1f a different power cord is desired contact your nearest HP Sales Office 2 32 To protect operating personnel the National Electrical Manufacturers Association NEMA recommends that the instrument panel and cabinet be grounded This instrument is eguipped with a three conductor power cable The third conductor is the ground conductor and when the cable is plugged into an appropriate receptacle the instru ment is grounded The offset pin on the power cable three prong connector is the ground connection In no event shall this instrument be operated without an adeguate cabinet ground connection 2 33 To preserve the protection feature when operating the instrument from a two contact outlet use a three prong to two prong adapter if permitted by focal regulations and connect the green lead on the adapter to ground VOLTAGE SELECT P C BOARD Figure 2 5 Line Voltage Conversion SECTION IH OPERATING INSTRUCTIONS 3 1 INTRODUCTION 3 2 This section contains ocerating instructions and programming information for the 59501A Isolated D A Power Supply programmer Since the 59501 A can be used as a power supply programmer or as D A converter low level dc signal source
78. of the supply For example if only 20V maximum is reguired for a model 6266B supply 40V rating the 6266B output range should be calibrated for OV to 20V Since the 59501A is program mable in 999 steps magnitude digits 000 999 resolution is 20 999 about 20mV in the high range and 2 999 about 2mV in the low range If the supply is calibrated for the full 40V rating the resolution is 40mV approx even though the supply would never be programmed above 20V 3 56 Note that for a 20V full scale output it is usually better to calibrate the full scale setting to 99 995 of 20V or 19 98V The reason for this is that the resolution will be 19 98 999 or exactly 20mV per step However if it is imperative to calibrate the output to exactly 20V the resolution is 20 999 or 20 02002mV per step Thus the user must determine the importance of having a round number for resolution when writing programs 3 57 Calibration To calibrate a 50501 A power supply combination for CV operating proceed as follows 3 58 Test Setup a Connect 59501A to an HP IB controller b Connect 59501 A to power supply CV program ming see Table 3 1 c Connect DVM between S and S terminals on the power supply d On 59501A set mode switch to UNIPOLAR and turn POWER SUPPLY FULL SCALE ADJUST COARSE and FINE fully CCW Also if power supply has a front panel CURRENT control set it to mid range approx 3 59 Calibration Procedure a Apnly powe
79. ona Calif G E Co Tube Dept Owensboro Ky Lectrohm inc Chicago lll P R Mailory amp Co Indianapolis Ind Muter Co Chicago Hi New Departure Hyatt Bearings Div General Motors Corp Sandusky Ohio Ohmite Manufacturing Co Skokie HI Penn Engr and Mfg Corp Doylestown Pa Polaroid Corp Cambridge Mass Raytheon Co Lexington Mass Simpson Electric Co Div of American Gage and Machine Co Chicago Hi Sprague Electric Co North Adams Mass Superior Electric Co Bristol Conn Syntron Div of FMC Corp Homer City Pa 6 3 MANUFACTURER ADDRESS 59730 Thomas and Betts Co Philadetphia Pa 61637 Union Carbide Corp New York N Y 63743 Ward Leonard Electric Co Mt Vernon N Y 70563 Amperite Co Inc Union City N J 70901 Beemer Engrg Co Fort Washington Pa 70903 Belden Corp Chicago Il 71218 Bud Radio Inc Willoughbv Ohio 71279 Cambridge Thermionic Corp Cambridge Mass 71400 Bussmann Mfg Div of McGraw Edison Co St Louis Mo 71450 CTS Corp Eikhart Ind 71468 LT T Cannon Electric Inc Los Angeles Calif 71590 Giobe Union Inc Milwaukee Wis 71700 General Cable Corp Cornish Wire Co Div Williamstown Mass 71707 Coto Coil Co Inc Providence R 1 71744 Chicago Miniature Lamp Works Chicago III 71785 Cinch Mfg Co and Howard B Jones Div Chicago ill 71984 Dow Corning Corp Midland Mich 72136 Electro Motive Mfg Co Inc Willima
80. or bipolar and is selectable via rear panel switch O to 9 99 Volts O to 4 999 Volts 10 to 9 98 Volts 1 to 998 Volts Un polar Bipolar DC Output Current 10mA Resolution High 10mV 20mV Unipolar Bipolar Accuracy Specified at 23 C B C Low 1 mV 1 2m V 1 BmV 1 10m V Unipolar Bipolar Stability Change in output over 8 hour interval under constant line load and ambient following a 30 minute warm up High Low 0496 5mV 046 1mV 04 1mV 04 2mV Unipolar Bipolar Temperature Coefficient High Low 0195 C 1mV C 01 C 1mV C 01 C 5mV c 01 C 5mV c Unipolar Bipolar Zero Adjust Plus or minus 250 millivolts D A Full Scale Adjust Plus or minus 5 Programming Speed The time required for output to go from zero to 99 of programmed output change is 250usec measured with resistive load connected to output terminals Stability is included in accuracy specification measure ments over the temperature range indicated 1 3 POWER SUPPLY PROGRAMMING Programming Network Specifications In the following spec ifications M represents the calibrated full scale value of the supply being programmed and P represents the actual pro grammed output Note that the full scale value M can be any value within the supply s output range and is calibrated with the 59501 A programmed to its maximum high range output Accuracy Does not inclu
81. ower Figure 3 9 CV Programming Connections for HP Power Suppiy Models 6427B 6448B and 6466C 6483C Supply Models 6453A 6456B and 6459A BIPOL AR POWER SUPPLY AMPLIFIER SEE TABLE BELOW 9501A TA ZERO ADJUST HP POWER SUPPLY 6464c XX 59501A EE 4 REF xX JUMPER 4 RT cy POWER SUPPLY FULL SCALE ADJUST CV COMPARISON AMPL POWER SUPPLY FULL SCALE ADJUST AMPLIFIER MODEL NO NE Send eee ct INPUT TERMS X INTERNAL JUMPER DESIGNATED R7 ON SCHEMATIC IN 6464C O 8 S MANUAL MUST BE REMOVED SET FRONT PANEL MODE SWITCH 3XX VOLTAGE PROGRAMMING WITH UNITY GAIN 6464C OUTPUT TO AMPLIFIER VOLTAGE VARIES IN A TOt RATIO WITH 59501A PROGRAMMING VOLTAGE SET FRONT PANEL MODE SWITCH TO VAR GAIN AMP SET RANGE SWITCH TO DESIRED OUTPUT RANGE Figure 3 10 CV Programming Connections for HP Power Figure 3 11 CV Programming Connections for Bipolar Supply Model 6464C Power Supply Amplifiers 6823A 6827A 3 8 3 52 CC Programming Connections Figures 3 12 through 3 17 illustrate the connections reguired to program the CC output of the applicable power supplies The dotted connections represent jumpers which must be removed on the supply s rear terminal strip All other jumpers must be connected as illustrated Note that only those power suppiy terminals pertinent to CC programming are shown Complete terminal strip details are provided in the appropriate power supply Operating and Service ma
82. program listings provided in the following examples are taken from an HP 9866B printer These listings are provided only because 9866B pr ntouts are easier to read than printouts from the 9825A s internal strip printer Also a check sum is provided at the end of each 9825A program listing Make sure that the check sum at the end of your keyed in program matches the check sum provided in the listing Example 6 9825A Sample Program Constant Voltage Unipolar Mode N ian ly WVoltose Patma i d a IHIFOLDR S SEE en HJ une LLN ESE EE l a CUE eidd uoitaegs E d a su je aan STATEMENT SEE PARA 3 32 Dl for B AGA Stp FIHE RILI for cab Gate mud to supply dete cutput ugitegg aw i LEES d kiwi i E a Ja H A 1 Can hi i l sd 1 ay lle SosHiate SARRA UT C Th a mt ae fut EN MT HE da Hi ata FORMAT AND WRITE STATEMENTS Dae SEE PARA 3 36 Ed OO CHECK SUM Explanation 1 2 Setup instructions 3 User enters desired maximum output voltage on keyboard e g 10 20 50 100 etc 4 Resolution is calculated and the maximum desired output is changed to 99 9 of voltage entered in line 3 see paragraph 3 56 5 10 Calibration routine using ZERO ADJUST and POWER SUPPLY FULL SCALE ADJUST COARSE and FINE controls on B9501 A front panel 11 12 Output is programmed to zero Load is connected to power supply s output terminals see applicable power supply
83. r rectifier Stabistor 15V 150mA Diode power rectifier Diode Si 200mA 75V Diode power rectifier HP B connector 24 pin microribbon SS PNP Si SS NPN Si SS PNP Si SS NPN Si J FET SS NPN Si J FET TO i MFR PART NO Note 1 This assembly is designed for component level repair 6 5 MFR CODE C067B102E102ZS26 DM15F501F0300WIC DD 471 5C5081 CML DM15E300J0500WVICR DM15F391J0300WVICR C023B102M153ZS27 5CZ5U105X0025C5C DM15E300J0500WVICR 5CZ5U105X0025C5C 5C5081 CML 150D226 X9015B2 150D105X9035A2 672D047 5C5081 CML 150D106X9020B2 150D105X9035A2 DM15E470J0500WVICR DM15E560J0300WVICR 1N4148 1N4148 1N4148 57 20240 2 2N3417 2N4392 2N4392 Repiacement assemblies cannot be supplied HP PART NO 0150 0050 0150 0093 0140 0234 0150 0093 0160 2496 0160 0335 0150 0093 0150 0121 0160 2006 0140 0203 0140 0200 0160 2477 0160 0127 0140 0203 0160 0127 0150 0093 0180 2685 0150 0121 0180 0228 0180 0291 0180 0634 0150 0121 0160 3068 0180 0374 0180 0291 0140 0204 0140 0191 1901 0050 1901 0460 1901 0050 1901 0535 1901 0327 1901 0535 1901 0327 1901 0460 1901 0327 1901 0050 1901 0327 1251 3283 1853 0099 1854 0071 1853 0099 1854 0087 1855 0386 1854 0071 1855 0386 RS REF DESIG Q10 Q11 Q12 14 Ri H2 3 R4 R5 R6 R7 R8 9 R10 15 R16 21 R22 R23 R24 25 R26 R27 R28 R29 R30 R31 R32 R33 R34 R35 R36 R37 R38 R39 R40 R41 R42
84. r to the controller the 59501 A and the power supply Allow 30 minute warm up b With the power supply s output terminals and open circuited program the 59501 A to maximum high range 2999 c Adjust POWER SUPPLY FULL SCALE ADJUST COARSE and FINE on 59501 A for desired maximum output voltage or 99 996 of desired max see paragraph 3 56 using the DVM d Program 59501A to zero output 2000 e Set ZERO ADJUST on 59501A for 0 000 reading on DVM f Program 59501A to 2999 and set POWER SUPPLY FULL SCALE FINE ADJUST on 59501 A for desired maximum output voltage if necessary use D A FULL SCALE ADJUST to obtain the required resolution NOTE f the supply has a front panel CURRENT control perform the following steps g Program 59501A to zero output 2000 Con nect a short across supply s output terminals h Program 59501A to 2999 and adjust the sup ply s front panel CURRENT control for the desi red maximum output current If a load change causes this current limit to be exceeded the supply automatically crosses over to constant current operation at this preset current limit and the output voltage drops proportionally If desired the front panel CURRENT control can be disabled and replaced with a fixed resistor of appropriate value see applicable power supply Operating and Service Manual i Program 2000 Remove short from supply s output terminais and connect load
85. rcuits listed below or to the acceptor handshake circuit A separ ate flow chart Figure 5 4 is provided to troubleshoot the acceptor handshake circut Figure 5 3 checks the digital circuits in the following sequence 1 Power on preset Listen logic Unlisten decoder Clock generator Data input circuits Isolators Data seguencer Data storage I M OMS O N 5 14 Acceptor Handshake Troubleshooting Figure 5 4 provides a static check of the acceptor handshake circuit However it is possible to have a condition where a faulty circuit would not be detected by performing these checks If a timing problem is suspected the acceptor handshake circuit must be checked dynamicaily A dynamic test can be made by continuously programming the 59501A to listen and observing the handshake signals on an oscillo scope The handshake cycle timing relationships are shown in Figure 4 2 5 15 REPAIR AND REPLACEMENT 5 16 All components and wiring are accessible when the top and bottom covers are removed The component side of the A1 board the chassis mounted components and the front pane components are accessible when the bottom cover is removed See Figure 7 1 The wiring side of the A1 board is accessible when the top cover is removed To remove the bottom cover remove two rear screws lift the cover and pull it to the rear The top cover is removed in a similar manner DISCONNECT 5950A FROM BYS YES AIU5 OR Alua sk DEFECTIV
86. rough inverter drivers U13 U14 to photo isolators U15 U16 U17 The inputs to the isolators are referenced to HP IB signal ground x while the outputs are referenced to power supply ground W With these input and output connections up to 600Vdc solation is provided between the HP IB data input lines and the 59501 A output terminals Each dual isolator IC package contains a pair of light emitting diodes and integrated photon detectors The isolated DIOT DIOA data bits are routed to the appropriate data 1 storage latches while the isolated clock and reset signals are sent to the data storage sequencer 4 31 Data Storage 4 32 The data storage circuits consist of data storage 1 latches data storage 2 latches and the data storage sequencer circuit The circuits store a data word which consists of four characters The characters are transferred from the bus one at a time with the range character transferred first followed by the three magnitude characters Each character bits DIO4 MSB DIO1 LSB is transferred into data storage 1 during the accompanying 3 wire handshake cycle After the fourth character is transferred into data storage 1 all four characters data word are automatically loaded into the data storage 2 latches The timing seguence for the data word transfer is provided in Figure 4 3 4 33 The leading edge of each ACDS pulse generates a clock pulse which gates the data storage sequencer Initially the data shift
87. s and Service Office as soon as possible see list at rear of this manual for addresses 2 5 Electrical Check 2 6 Check the electrical performance of the instrument as soon as possible after receipt Section V of this manual contains procedures which will verify instrument operation on the HP iB These procedures are also suitable for incom ing quality control inspection Refer to the inside front cover of the manual for the Certification and Warranty statements 2 7 REPACKAGING FOR SHIPMENT 2 8 To insure safe shipment of the instrument it is recommended that the package designed for the instrument be used The original packaging material is reusable Hf it is not available contact your local Hewlett Packard field office to obtain the materials This office will also furnish the address of the nearest service office to which the instru ment can be shipped Be sure to attach a tag to the instru ment specifying the owner model number full serial number and service required or a brief description of the trouble 2 9 INSTALLATION DATA 2 10 The 59501A is shipped ready for operation on the HP IB Before connecting it to a controller and applying power read paragraph 2 26 If external damage to the shipping carton is evident 2 1 dimensions of Model 59501 A 213 Rack Mounting 2 14 The 595017 A can be rack mounted in a standard 19 inch rack panei either by itself or alongside another half or quarter System ll module of
88. s the operator to input specific voltage values on the keyboard The program also provides auto matic range changing and error messages that indicate if the voltage value requested exceeds 9 99V or if a negative voltage is requested A tine by line explanation is given after the program Programming fundamentals are provided in paragraphs 3 29 through 3 36 3 80 The sample program requires use of the General 1 O and Extended 1 O ROM s After keying in the program press RUN Al operations required to complete the program are given on the calculator display After each operation is completed press CONTINUE NOTE The program listings provided in the following examples are taken from an HP 9866B printer These listings are provided only because 9866B printouts are easier to read than printouts from the 9825AS internal strip printer Also a check sum is provided at the end of each 98254 program of your keyed in program matches the check sum provided in the listing Example 8 9825A Sample Program 59501A Unipolar Output He C LINTPEILFIR Sup dy UM Fo Edt PETS Sa ig EIR SMS LD FE hi abc ir E las dip H 1345 wgit W umit t L Lis Bike ela 5 4 cas TP 3 end Drop eb sa d ER Bin tP IN oat aa a 8 1 E het die Ho Meaatiue Voltases joe fmt istd Dem urt TEEL Hiate 1 i l aape ERRA udd Explanation J Setup instructions 2 5 Calibration ins
89. shed through the transmission of four consecutive digits four ASCH characters The first digit specifies output range and the next three digits specify the magnitude within the selected range The high low range capability provides a ten to one improvement in resolution Internal conversion circuitry enables the 59501A to produce its maximum output voltage in approximately 250usec from the time the digital data is received Output current up to 10 milliamps is available and is automatically limited to protect the 59501A and the user equipment 1 7 HP IB CAPABILITIES 1 8 The 59501A has listener and acceptor hand shake HP iB functional capabilities The LISTENING indicator on the front panel provides a convenient means of monitoring the 59501A operating status The 59501A does not have controller talker source handshake service request device trigger extended listener extended talker parallel poll and remote focal HP IB functional capabilities AH HP 1B functional capabilities are described in IEEE Standard 488 1975 1 9 SPECIFICATIONS 1 10 Detailed specifications for the 59501 A are given in Table 1 1 1 11 ACCESSORIES 1 12 The System ll cabinet accessories listed below may be ordered with the 59501 4A unit or separately from your local Hewlett Packard field sales office refer to list at rear of manual for addresses All accessories applicable to Svstem H modular cabinets are fully described and illustrated in the
90. t the 59501 is inhibited from processing data words 3 10 The front panel screwdriver adjustments allow fast and easy calibration of D A and power supply outputs Each adjustment is described below 3 11 The ZERO ADJUST allows the 59501A out put to be adjusted to OV 250 millivolts when it is program med to zero output It can also be used to correct for small offsets in power supply response to programmed inputs when the 59501A is used as a power supply programmer 3 12 The D A FULL SCALE ADJUST allows the 59501A output to be adjusted to maximum 556 when it is programmed to maximum For example if the 59501A is programmed to its maximum unipolar output in the high range the D A FULL SCALE ADJUST is normally used to set the output to 9 99V However it can also be used to set the output between 9 49V and 10 49V i e 9 99V 45 The D A FULL SCALE ADJUST is used when the 59501A is employed as a D A see paragraphs 3 75 through 3 82 When the 59501A is used as a power supply programmer the POWER SUPPLY FULL SCALE ADJUST controls are ut lized to set the power supply s output 3 13 The POWER SUPPLY FULL SCALE ADJUST controls COARSE and FINE enab e the user to set the maximum output desired from the power supply when the 59501A is programmed to its maximum value These adjustments can be used to calibrate the output of a power supply to its maximum rated output or to any lower value For example a 40Vdc power supply s
91. tivate the special protection circuit When this occurs the power supply s load cannot draw more than 10 approx of rated output current until the protection circuit resets If it is desired to program the output voltage down to a tower value without the need to draw full output current the reset time is not important The reset time can take from 500msec to 6 seconds depending upon the particular model the load and the starting and the ending voltage values For example the actual output voltage of a 6264 B supply takes only 80msec for its output to go from 20 volts down to 1 20 millivolts but it will be about 800 milll seconds before the circuit resets allowing the full output current to be supplied to the load Additional information concerning this protection circuit is provided in HP 1B Power Supply Guide HP Part No 5952 3990 3 50 Special Opt on J30 An additional circuit desig nated special Option J30 is reguired when CV programming models 6427B through 6448B and 6466C through 6483C The Option J30 circuit is a voltage to current converter and is required because the 59501A is essentially a constant voltage source The above supplies utilize current sources in their programming networks The programmable 0 10V output of the 59501A is connected to the Option J30 input terminals and on the rear of the supply as shown in Figure 3 8 One characteristic of the J30 converter is that if its input is open circuited
92. to the proper storage 1 latch position After the fourth digit is loaded into data storage 1 all four digits data word are automatically transferred into the data storage 2 latches The three magnitude digits are then sent to the digital to analog converter DAC while the range digit is sent to the analog amplifier circuits The data storage 2 latches will retain this data until a new data word is transferred 4 9 Digital to Analog Converter DAC 4 10 The DAC converts the three magnitude digits 12 bits BCD into an output current The DAC output range 0 2mA nominal corresponds to the BCD input range of 000 999 The DAC output current s applied to the current to voltage I V converter in the analog amplifier circuits The UNIPOLAR BIPOLAR switch on the rear of the 59501 A changes the feedback path between the DAC and the I V converter so that the I V converter provides an output range from 0 to 2 5V nominal in the unipolar mode and from 2 5V to 2 5V nominal in the bipolar mode 4 11 Analog Amplifier Circuits 4 12 The unipolar or bipolar output of the V converter is applied to the output amplifier The output amplifier provides either a high range or a low range output voltage between terminals A1 and A2 The range switch controls the gain of the amplifier so that a high range or a low range output is produced The range switch is set to high range when a 2 is programmed and to low range when a 1 is programmed
93. tput Note that when power is turned on there is a delay before the 15V supply voltage is available consequently Q2 is turned off at initial power turn on After the delay Q2 turns on removing the reset condition at U25 When the first data word is loaded into data storage 2 shift register B output U25 13 goes HI see paragraph 4 33d turning off O1 With Q1 off FET s Q7 Q8 and Q9 cutoff allowing the output amplifier to provide an output determined by the programmed data word 4 52 At turn off the 15V supply voltage decays faster than the 15V and Vdd supply voltages When the 15V supply decays sufficiently U25 is reset U25 13 goes LO turning on Q1 which causes FET s O7 09 to conduct Thus the output is clamped at a low level during the decay of the 15V and Vdd supply voltages 4 53 Bias Voltages 4 54 The bias voltages for the digital and analog circuits on the main printed circuit board are generated and distri buted as shown on sheet 1 of the schematic Figure 7 3 4 55 Ac power is applied through the power module and power transformer T1 to two full wave bridge rectifiers Integrated circuit U32 receives its raw unregulated dc from full wave rectifier CR14 16 and filter C27 C28 1C U32 provides a regulated 5V output with respect to data common NA for all TTL logic circuits on the data common side of the photo isolators 4 7 4 56 Integrated circuit U33 receives its raw unregulated dc fro
94. tructions using ZERO ADJUST and D A FULL SCALE ADJUST on 59501A 6 User inputs desired output voltage 0 to 9 99 on keyboard 7 17 Proper range is selected and correct data word value N is calculated to represent voitage requested If the voltage requested line 6 is too high or negative the appropriate error message appears on the display for three seconds and then the program returns to line 6 18 Data word N is sent to the 59501A Format f4 0 deletes leading spaces and z suppresses the carriage return line feed characters If leading spaces are not deleted and the CR LF characters are not suppressed the output will go to an undesired value see paragraph 3 36 3 16 3 81 Bipolar Mode 3 82 Calibration The ZERO ADJUST allows the nega tive limit to be set to 10V when the 59501A is program med to zero 2000 The D A FULL SCALE ADJUST allows the positive limit to be set to 9 98V when the 59501 A is programmed to maximum 2999 This range ming step Calibration procedures for operating in the bipolar mode are provided in paragraph 5 30 3 83 Sample Program A sample program for control ting the bipolar output of the 59501 A is given in example 9 This program is similar to the unipolar mode program given in example 8 except that it allows keyboard input results in a resolution of 19 98V 999 or 20mV per program of bipolar voltage from 10V to 9 98V Example 9 9825A Sample Program 59501A Bipolar Output RI
95. undesired value see paragraph 3 36 3 14 3 69 CC Programming 3 70 The following paragraphs provide calibration pro cedures which are applicable to all power supplies listed for CC programming in Table 3 1 Calibrating the supply for CC programming with the 59501A consists essentially of two adjustments 1 Setting the supply s output current to zero when the 59501A is programmed to zero 2 Setting the supply s output current to a desired maximum value when the 59501 A is programmed to maximum 3 71 Calibration To calibrate a 59501 A power supply combination for CC programming proceed as follows 3 72 Test Setup a Connect 59501A to an HP IB controller b Connect 59501A to power supply CC program ming see Table 3 1 c Connect a resistive load in series with an external current monitoring resistor across supply s out put terminals Refer to Section V of applicable Operating and Service manual for resistor values power ratings and CC test setup diagram etc Connect a DVM across the current monitoring resistor d On 59501 A set mode switch to UNIPOLAR and turn POWER SUPPLY FULL SCALE ADJUST COARSE and FINE fully CCW e On power supply set front panel VOLTAGE control fully CW 3 73 Calibration Procedure a Apply power to the controller the 59501 A and the power supply Allow 30 minute warm up b Program 59501 A to 2999 and set POWER SUPPLY FULL SCALE ADJUST COARSE and FINE for desired m
96. uously from 1 1 1 1 0 gt a nominal 100V 120V 220V or 240V 48 83Hz power 2 3 source A printed circuit board located within the ac power module on the rear panel selects the power source Voltage choices are available on both sides of the PC board Before connecting the instrument to the power source check that the PC board selection matches the nominal line voltage of the source The operating voltage that is selected is the one printed on the lower left side of the PC board see Figure 2 5 As shipped from the factory the PC board in this unit is positioned for 120Vac operation To select another input voitage proceed as follows a Remove power cable from instrument b Move plastic door on power module aside c Rotate FUSE PULL to the left and remove line fuse F1 d Remove PC board from slot Select operating voltage by orienting PC board to position the desired voltage on topleft side of PC board Push board firmly into siot e Rotate FUSE PULL back into normal position and re insert fuse Fl in holder using caution to select the correct value for F1 125mA for 100V or 120V and 62 5mA sto blo for 220V or 240V f Close plastic door and connect power cable 2 29 When the instrument leaves the factory a 125m A fuse is installed for 120V operation An envelope contain ing a 62 5mA fuse for 220V 240V operation is attached to the instrument Make sure that the correct fuse value for F1 is installed if the position
97. when the 59501A s listen address is decoded and ATN is true command made the listen logic is set For this condition the LISTENING indicator is turned on and the clock generator is enabled allowing the 59501A to process subsequent data words received on the bus If the ATN line is true and an unlisten command is received the listen logic is reset For this condition the LISTENING indicator is turned off and the clock generator s disabled inhibiting the 59501A from processing data words Note that the IFC signal also resets the listen logic The IFC signal is used by the controller to terminate activity on the HP IB 4 2 4 7 When the ATN line is false and the 59501A is listening listen logic is set the digital processing circuits will store a data word comprised of four digits characters transmitted consecutively The first digit specifies the out put range low or high and the next three digits specify the magnitude of the output voltage within the selected range Each digit represented by bits D104 MSB DIO1 LSB is transferred into data storage 1 via input nverters and photo isolators during the accompanying 3 wire hand shake cycle The photo isolators provide 600Vdc isolation between the HP 1B data lines and the 59501A s output voltage terminals A1 and A2 4 8 A clock pulse generated during each handshake cycle gates the data storage sequencer which in turn loads each digit 1 range 3 magnitude in

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