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Fluke 4270A User's Manual

1. LOGIC GRD LOGIC PWR 5 vdc at 0 to 125mA NOT USED DATA STROBE 01 Option See Figure 2 6 INITIATES DIGITAL TO ANALOG CON VERSION STANDBY OPERATE LOGIC 0 OPERATE LOGIC 1 STANDBY SIGN LOGIC 0 POSITIVE OUTPUT LOGIC 1 NEGATIVE OUTPUT EXTERNAL REFERENCE 03 Option LOGIC 0 INTERNAL REFERENCE LOGIC 1 EXTERNAL REFERENCE READY NOT READY FLAG LOGIC 0 READY LOGIC 1 NOT READY NOT USED CURRENT OVERLOAD FLAG LOGIC 0 NORMAL LOGIC 1 OVERLOAD NOT USED 6 2 6 10 Manual Operation 6 11 Operation of the 4210 07 with the Accessory A4200 is done as follows Ensure that all push buttons on the A4200 are in the non depressed condition b Attach mating connector on A4200 cable to Pro gramming Connector 71 on rear of Model 42104 07 To obtain decade output voltage ranging from 100 to 1500uV depress CURRENT LIMIT press buttons 10 20 40 and 80 sequentially The STROBE push button must be depressed following each of the above Depression of a current limit button followed by a STROBE calls an output voltage in microvolts that is ten times the button legend s A second depression followed by a STROBE removes the call 6 12 THEORY OF OPERATION 6 13 General 6 14 5 BCD Ladder 4210 1032 6 15 AS BCD Ladder contains a buffer amplifier for and the fo
2. oozy O 71091409 SINH Y3LSIDJH SOQANOS 13195 002 OL viva u3isio3H LAHS aaisni aaisino 380815 538104 312012 4 7qOHlNOO 21901 TIOH LNOO 380815 viva 72072 ZHW OL l1Hvis 72072 21001 ONILNAW 31d WOO viva SHALSIOSY 12198 1 SALLVO3N Figure 609 9 4200 09 Simplified Block Diagram 609 19 4 79 4200 09 609 69 control word is also loaded into a shift register it is double buffered to prevent any change in voltage source output while loading is taking place Double buffering is provided by a series of latch circuits which receive a load pulse froma latch timing circuit The latch timing circuit issues the load pulse to the latch circuits sometime after the last clock pulse when all data has been shifted into the registers As the load pulse occurs the latch circuits are loaded with the control word which they present in parallel form to the 4200 Voltage Source Double buffering for the data word is not required since the hold signal freezes the voltage source output magnitude until the data word is completely loaded into the shift register 609 70 Clock pulses shift and load pro
3. STANDBY CONTROL DATA WORD TRANSFER _ STROBE ONE SHOT FLIP FLOP CONTROL G U19 ug CONTROL STROBE STROBE SIGNAL NOT READY DATA WOR SINE FIRST HOLD ONESHOT ATA WORD DATA WORD ONE SHOT 222 01 03 U10 MAINFRAME U4 U5 u19 800 nsec ADDRESS NOT READY PULSE NOT READY CURRENT LIMIT SIGNAL ABNORMAL STATUS CURRENT LIMIT FLAG POWER FAIL FLAG STATUS ENABLE Figure 609 10 4200 09 Functional Block Diagram 609 22 4 79 4200 09 SIGN BIT INDICATING POS BINARY OR ANY BCD DATA SERIAL DATA WORD SIGN BIT DATA WORD INDICATING Beane TER NEG BINARY DATA CLOCK PULSES U24 U25 CONTROL CONTROL WORD TO 4200 CONTROL WORD SHIFT REGISTER LATCH CIRCUITS CLOCK PULSES LATCH ock TIMING GENERA US CE ONE SHOT PULSES 929 DC OUTPUT STANDBY DATA TRANSFER GATED CLOCK PULSES STANDBY PULSES HALF WAVE RECTIFIER CR16 HOLD PULSES T6 SECOND HOLD SIGNAL HOLD ONE SHOT 923 CURRENT CURRENT j _ HALF WAVE OSCILLATOR SIGNAL T1 LIMIT LIMIT FLAG RECTIFIER OSCILLATOR ENABLE 012 023 Q25 CR3 Figure 609 10 4200 09 Functional Block Diagram cont 4 79 609 23 4200 09 STROBE PULSE EITHER STROBE CONTROL WORD O
4. Figure 609 7 Muitiple Mainframe Addressing 609 15 4200 09 Table 609 4 Mainframe Addresses Pin Assignments PIN NUMBER 50 pin connector on power source no zero POWER SOURCE MAINFRAME ADDRESS VOoRAN O 609 39 STANDBY OPERATE SYNCHRONOUS OR ASYNCHRONOUS 609 40 4200 09 Voltage Sources be placed in either a Standby or Operate condition by the program source Jumper configurations on the 4200 09 Option pebs determine whether the Standby Operate command is synchronous transferred with the data or control word or asynchronous transferred independently Asynchronous Standby Operate commands are executed immediately upon receipt by the voltage source synchronous commands are transferred and executed with the program data transfer Strobe pulse 609 41 In the standard Binary operating mode the program source supplies Standby Operate commands on one line That line goes to all voltage sources at Standby Operate zero pin 17 of the 50 pin rear panel connector Binary Standby Operate commands are transferred synchronously In the standard BCD operating mode the program source must supply one Standby Operate line per unit All BCD Standby Operate lines go to the first unit in a system and chain down from unit to unit exactly as the address lines do BCD Standby Operate lines transfer asynchronously thus they must be latched and maintained in the desired state at a
5. BCD inputs 0 to 16 665Vdc 4 bit binary by decade 99 99Vdc BCD inputs 1100 4 4 bit binary by decade Maximum output terminal voltage 1100V 107 range 1 0mV 1004V option 07 X10V range 10mV 1mV option 07 Oto 0 5 Short circuit protected at 0 6 ampere Ignx mA 500 4 5 Overload protected Maximum voltage 110 10V range 0 01 of program 100uV X10V range 0 01 of program 700uV 10 range 2 1mV 500uV rms X10V range 3 6mV p p 1 2mV rms Settles to 0 1 of the programmed change in 80us Settles to 0 01 of the programmed change in 110us range change does not increase settling time Noise between digital programming ground and the analog output is rejected 1000 1 60db at 1MHz 0 04 milliohms dc 1 phm 30 kHz to 14 5Vde or peak ac 100k ohms in parallel with 70 pF 10V range 0 to 12V rms 17V peak X10V range 0 to 78V rms 110V peak 350mA rms 0 5 amp peak de to 30 kHz Accuracy 15 C to 35 C 90 days with respect to the External Reference Exp Programming Resolution PROGRAMMABLE CURRENT LIMIT Option 06 OUTPUT STABILITY TEMPERATURE COEFFICIENT Temperatures between 15 and 35 C LOAD REGULATION LOAD RECOVERY LINEREGULATION BARRIER STRIP TERMINALS PROGRAMMING CONNECTOR See Table 1 3 INPUT POWER ENVIRONMENTAL Temperature Relative Humidity Shock Vibration ES Altit de hose
6. ZERO POLL STATUS 4200 09 No 1 POLL STATUS 4200 09 No 2 POLL STATUS 4200 09 No 3 POLL STATUS 4200 09 4 POLL STATUS 4200 09 No 5 POLL STATUS 4200 09 No 6 POLL STATUS 4200 09 No 7 Figure 609 8 Status Busses 609 18 609 63 THEORY OF OPERATION 609 64 Overall Functional Description 609 65 Many diverse programming methods are possible with different jumpering configurations for all 4200 09 voltage sources Since all possible configurations cannot be described in detail these theory discussions are somewhat generalized In any configuration the primary function of the 4200 09 is to receive output magnitude data and control data in parallel form from a program source and transfer that data across the voltage source guard shield to the voltage source D A converter Figure 609 9 is a simplified block diagram of the 4200 09 showing how data and control words are applied to shift registers in parallel form clocked out of the registers in serial form coupled across the guard shield and reconverted to parallel form for input to the voltage source D A converter 609 66 Upon receipt of a data word strobe or control word strobe the control logic generates a load command to one or both shift registers The data word and control word supplied by the program source and present at the shift register inputs is loaded into the shift registers When the shift regis
7. 1 Figure 5 6 BINARY LADDER ASSEMBLY 5 23 4270A MFG DESCRIPTION PART NO LOGIC ASSEMBLY 365692 365692 Figure 5 7 Cap mylar 0 001 uF 10 200V 159582 10292 Cap mica 12 pF 5 500 175224 DM15C120J Cap mica 100 pF 1 500V 226126 DMISFIOIF Cap Ta 0 68 uF 10 35V 182790 Cap polyst 0033 uF 2 100V 168344 Cap mica 56 pF 5 500V 148528 71236 DMISFS5607 Cap mica 270 pF 5 5007 148452 71236 DM15F271J Cap cer 0 025 uF 20 SOV 168435 Cap elect 220 uF 10 50 10V 236935 25403 ET221X010AS Cap cer 0027 uF GMV 600V 106211 5GA D33 Cap mica 620 pF 5 5007 215244 DM19F621J Cap mica 360 pF 1 500V 170407 DMISF361F Cap mica 220 pF 5 5007 170423 DM15F221J Cap plstc 0 10 uF 10 SOOV 271866 75 2 5 104 Not Used Cap polyst 0 0075 uF 2 100V 168369 PE 752 G Diode Hi speed switching 256339 5082 2900 Diode Si 150 mA 203323 DHD1105 Xstr Si NPN 159855 523030 Xstr Si uni junction 268110 2N6027 Res met film 523 1 1 8W 294835 MFF1 85230F DESCRIPTION Res comp 1 0k 5 W Res comp 2 7 5 Res comp 1 5k 5 Not used Res met film 11 5k 1 1 8W Re comp 100k 5 W Res comp 390k 5 W Res comp 390 5 Res comp 1 3k 5 W Res met film 32 4k 1 1 8W Res comp 12k 5 4W Res comp 200 5 W Res 510 5 Res comp 3 3k 5 Res met film 6 98k 1 1 8W Re
8. 296376 MFF1 21873F 4270A MFG DESCRIPTION PART NO Res ww 45 0 1 1 8W 111815 TYPE 1250 Res met flm 2k 1 1 8W 277137 MFF1 8202F Res met flm 10k 1 1 8W 291633 MFF1 8103F Res var cermet 100 10 W 285130 360S 101A Res met fim 49 9k 1 182980 MFF1 249R9F Res met flm 2 1k 1 W 193276 MFF1 2212F Res comp 100 5 W 147926 CB1015 Res comp 5 1k 5 193342 CB5125 Res met flm 10k 1 4W 151274 7 MFF12103F Res met fim 4 87k 1 ZW 247775 1 24887 Res met flm 2 49k 1 AW 193995 MFF1 22R49F Res comp 1k 5 14W 148023 CB1025 Res comp 820 5 AW 148015 CB8215 Res comp 18k 5 W 148122 CB1835 Res comp 47k 5 148163 4735 Res comp 3 9k 5 148064 CB3925 Res comp 2 7k 5 4W 170720 CB2725 Res comp 4 7k 5 148072 CB4725 Res 270 5 WW 160804 CB2715 Socket IC 14 contact 276527 23880 TSA 2900 14W 2 4270A Figure 5 5 EXTERNAL REFERENCE PCB ASSEMBLY 03 OPTION 5 19 4270A MFG DESCRIPTION PART NO BCD LADDER PCB ASSEMBLY 292565 Figure 5 6 Cap cer 0 05 uf 20 100V 149161 55 23 1 Diode silicon 150 ma 203323 DHD1105 Diode Field Effect current regulator 285106 CRE3021 Xstr silicon NPN 168716 19254 Xstr silicon PNP 269076 2N4037 Not used Xstr silicon PNP 195974 2N3906 Xstr J FET N channel U2366E Matched Pair 306399 306399 Xstr silicon NPN 218396 2N3904 Xstr J FET N channel
9. 90 piv 260554 CD55105 Diode silicon 150 ma 203323 DHD1105 Diode zener 342527 TD333719 Xstr FET SET N channel 256487 256487 Xstr silicon PNP 195974 2N3906 4270A FLUKE PART TOTIRECIUSE DESCRIPTION SES 05 09 013 017 019 020 Xstr silicon NPN 218396 04713 2N3904 9 026 033 036 018 Xstr FET dual N channel selected 225987 89536 225987 1 021 022 Xstr FET P channel 306142 05397 3N173 3 035 023 Xstr silicon NPN 159855 07910 CS23030 1 024 025 Xstr silicon PNP dual 242016 07263 SE4901 2 027 028 Xstr silicon NPN 269084 07910 CS2484 2 029 Xstr silicon NPN 150359 95303 2N3053 1 030 Xstr J FET N channel 288324 12040 SF50070 1 R1 R3 7 R9 613 815 Res comp 51k 5 ZW 193334 01121 CB5135 10 019 821 838 841 R2 R8 IR14 ROO R47 thru Res comp 100k 5 W 148189 01121 CB1045 10 850 870 RO 1 R4 R6 R10 R12 R16 R18 Res comp 2 7k 5 170720 101121 CB2725 10 IR22 R24 R44 R46 25 817 823 Res comp 560 5 14W 147991 01121 VN5615 4 R25 Res ww 108k 0 1 AW R26 Res ww 25 013k 0 1 4W R27 Res ww 50k 0 1 Matched R29 Res ww 100 025 0 1 Set 333575 89536 333575 1 R31 Res ww 200 075k 0 1 4W R35 Res ww 200 20k 0 1 4W R42 R43 Res ww 11 104k 0 1 4W ES UM 5 13 4270A 5 14 DESCRIPTION Res var cermet 50 5 1W Res var cermet 100 10 1
10. FNAC lt a lt violw 2 lt 62 HN POW REAR PANEL B WHITE WHITE RED RED REO 1 MLL RESISTANCE IN MICROPARAL 4 9p CHASSIS X 5257 MOUNTED ONAL PUWER SUPPLY ASSEMBLY
11. response Are both Abnormal Staus and Power Fail flags malfunctioning Check 5V supply from Program Source Has the Abnormal Status flag failed Check Polled Power Fail flag status gate logic Does Current Limit flag operate normally Check Abnormal Status flag status gate circuitry Troubleshoot Current Limit flag circuitry 609 100 ILLUSTRATED PARTS LIST 609 101 Components in the illustrated parts breakdown are listed alphanumerically by assembly See Table 609 11 Electrical and mechanical components are listed by reference designation Each listed part is shown in an accompanying illustration For parts ordering information refer to Section 5 609 28 NOTE The following parts list includes timing components necessary to use the 4200 09 Option in a 4210A or 4216A Voltage Source See Addendum 609 11A for component values and Fluke part numbers used in 4200 09 Option units installed in 4250A 42654 4270A and 4275A Voltage Sources 4 79 Ct ca ch C6 C7 C9 C10 C11 C15 C20 621 022 c34 C35 C36 C37 38 C39 cho chy c42 C43 chy 45 46 CAT c48 49 C53 c55 c56 C57 C58 C59 C60 C61 c62 C63 C65 C65 C66 C67 C65 C69 MULTI STROBE ISOLATED LOGIC ASSY Table 609 11 Multi Strobe Isolated Logic PCB Assembly DESCRIPTION FIGURE 6 12 MICA 12 PF 5 5007 MICA 12 PF 5 500V MICA 750 PF 5 5
12. 03 EXTERNAL REFERENCE Field Installable LIMIT Field Installable 100uV RESOLUTION Field Installable LOGIC Field Installable 1 6 SPECIFICATIONS OUTPUT VOLTAGE OUTPUT VOLTAGE RESOLUTION OUTPUT CURRENT CURRENT SINK CAPABILITY ACCURACY 15 C to 35 C 90 days STEADY STATE RIPPLE AND NOISE 10 Hz to 10 MHz bandwidth SPEED DIGITAL NOISE REJECTION OUTPUT IMPEDANCE a EXTERNAL REFERENCE Option 03 Voltage Range Input Impedance Output Voltage Output Current Frequency Range PROGRAMMABLE CURRENT MULTI STROBE ISOLATED Table 1 1 OPTIONS DESCRIPTION Allows the use of an external signal source in place of the internal refer ence voltage Any dc or ac signal can be used that has an amplitude from 0 to 14 5 volts dc or peak ac and a frequency from to 30 kHz Input impedance is 100k in parallel with 70pF Programmable current limit is provided in two ranges 50mA and 0 5 ampere Each range may be programmed in 1096 increments from 10 to 11096 of range The 07 Option provides 100uV resolution on the range 1mV on the X10V range Permits any of the Fluke 4200 series Programmable Voltage Sources to be remotely controlled by a large variety of program sources such as a computer a system coupler as well as a Fluke Automatic Test Equip ment System Refer to Section 6 for details 0 to 9 999
13. 5 5 5 FREQUENCY Figure 2 10 AC EXTERNAL REFERENCE FEED THROUGH VERSUS FREQUENCY OUTPUT PHASE SHIFT IN DEGREES 1 FREQUENCY Figure 2 11 EXTERNAL REFERENCE PHASE SHIFT VERSUS FREQUENCY 4 2 4 4270A EXTERNAL REFERENCE 10V rms rH i OUTPUT 3V rms 102 LOAD LI INI 100 040 PERCENT TOTAL HARMONIC DISTORTION FREQUENCY Figure 2 12 EXTERNAL REFERENCE OUTPUT 30 rms HAR MONIC DISTORTION VERSUS FREQUENCY 2 9 2 10 3 1 INTRODUCTION 3 2 This section contains the theory of operation for the Model 4270A The information is arranged under head ings of FUNDAMENTAL CIRCUIT DESCRIPTIONS BLOCK DIAGRAM ANALYSIS and CIRCUIT DESCRIP TIONS An equivalent circuit of the power source is shown in Figure 3 1 Figure 3 2 is a simplified block diagram 3 3 FUNDAMENTAL CIRCUIT DESCRIPTION 34 The Model 4270A converts a digital program word into a representative dc output voltage Basically the cir cuitry consists of a high gain operational amplifier shown in Figure 3 1 Digital to analog conversion is done using a lad der network driven by a bi polar reference voltage The differential amplifier then produces an output
14. 84682 Essex International Inc industrial Wire Div Peabody Massachusetts 86577 Precision Metal Products of Maiden inc Stoneham Massachusetts 86684 Radio Corp of America Electronic Components Div Harrison New Jersey 86928 Seastrom Mig Co Inc Giendaie California 87034 illuminated Products inc Subsidiary of Oak industries Inc Anahiem California 88219 Gould Inc industrial Div Trenton New Jersey 88245 Litton Systems Inc Useco Div Van Nuys California 88419 Cornell Dubilier Electronic Div Federal Pacific Co Fuquay Varian North Carolina 88486 Plastic Wire amp Cable Jewitt City Connecticut 88690 Replaced by 04217 89536 John Fluke Mfg Co Inc Seattle Washington 89730 G E Co Newark Lamp Works Newark New Jersey 90201 Mailory Capacitor Co Div of P R Mallory Co inc Indianapolis indiana 90211 Use 56365 Square D Co Chicago Illinois 90215 Best Stamp amp Mfg Co Kansas City Missouri 90303 Mailory Battery Co Div of Mallory Co Inc Tarrytown New York 91094 Essex Internat onal Inc Suglex IWP Div Newmarket New Hampshire 91293 Johanson Mfg Co Boonton New Jersey 91407 Replaced by 58474 91502 Associated Machine Santa Clara California 91506 Augat inc Attleboro Massachusetts 91637 Daie Electronics Inc Columbus Nebraska 91662 Eico Corp Willow Grove Pennsylvania 91737 Use 71468 Gremar M
15. SIZE See Figure 1 1 ACCESSORIES Manual Control Unit Rack Mounting Brackets Programming Mating Connector Extender PCB Assembly Cable Extender Assembly 4270A 10V range 0 01 of program 0001 75 100 at de range 0001 75 7000 at dc EXR 10V range Exp x 10 volts 10 range Exp x 10 volts 5 range 5mA to 55 in 5mA increments 0 5 amp range 50mA to 0 55 amp in 50mA increments Minimum program possible 5mA 10 range 10 of program 40uV for 24 hours 30ppm of program 70uV for 90 days X10V range 10 ppm of program 280uV for 24 hours 30ppm of program 490uV for 90 days range 10ppm of program 5uV per C range 10ppm of program 35uV per C An output current change of 0 5 ampere causes the output voltage to change less than 0 001 of range The output voltage will settle to within 0 01 of final value in 110 after an output current change of 0 5 ampere The output voltage will change less than 0 001 of range for a 10 change in line voltage EXT REF LO EXT REF HI OUTPUT HI SENSE HI SENSE LO OUTPUT LO GUARD and CHASSIS Terminals are located on the rear panel The GUARD terminal can be floated up to 1000 volts above chassis ground 50 connector is located on the rear panel Mating connector is Amphenol Blue Ribbon Part No 57 30500 and is included with each power source 100 115 125 200 230 250Va
16. after the instrument has been operating for a minimum period of one half hour with all covers in place Connect a dc voltmeter to OUTPUT HI and LO ter minals on the rear panel barrier strip Release all MCU buttons except MANUAL and depress STROBE This action calls for a OV output positive in the low range Check that only the POWER indicator is on Adjust AMPLIFIER ZERO A3 ZERO for an out put of OVdc t 10uV Depress the RANGE and STROBE buttons Check that the 100 VOLT RANGE indicator is on This action calls the high or X10 range and OV 70uVdc output If the output reading is not within tolerance repeat steps a through c g 4 29 SIGN DECADE POLARITY A b 4270 If the A4 External Reference is installed 03 Option depress EXT REF A decade 8 4 2 and 1 buttons and release RANGE Depress STROBE and check that A decade indicators 8 4 2 1 and EXT REF indicator illuminate Connect a shorting jumper between EXT REF HI and EXT REF LO terminals on the rear panel barrier strip Adjust EXT REF ZERO A4 EXT REF ZERO for an output of OV 10uV Remove the shorting jumper release all MCU buttons except MANUAL depress STROBE and check that the only indicator remaining on is POWER Output Checks Perform the linearity checks given in Table 4 3 and check that the specified outputs are obtained Con nect an ac dc vol
17. 0V which turns off Q8 and Q11 and switches the FET gates Q2 and Q3 on With Q8 cut off Q9 conducts and turns on 010 thus switching the FET gates Q5 Q6 and Q25 off As a result the voltage at pin D is 10V when a negative output is called Should the STANDBY or EXT REF mode be programmed low 5V commands exist at pins S or V These low inputs will turn on Q7 and Q8 thus turning on both Q10 and Q11 and switch all FET gates off As a result the Vp gp supply is com pletely disconnected from the Vg gp output terminals and D 3 38 RELAY DRIVER 3 39 Relay Driver composed of Q19 and Q20 is used to energize K1 when the power source is turned on The contacts of K1 then complete the connections to the OUTPUT connector Whould the power source be shut off for any reason the connections are broken and the load is not subjected to any unprogrammed voltage 3 40 A3 Preamplifier 4275A 1051 3 41 The Preamplifier produces a drive signal pro portional to the input programming commands This drive signal is applied to the A9 Power Amplifier which in turn produces the power source output The circuitry consists of the four most significant bits of the binary ladder and associated switches and drivers ladder clamps voltage range switches high impedance input stage sample and hold and output stage 342 BINARY LADDER 3 43 four most significant bits of the Binary Ladder consist essentially of R26 R27
18. 1 1 8W 168252 91637 1 84991 REF 609 30 4 79 4200 09 Table 609 11 Multi Strobe Isolated Logic PCB Assembly cont MFG PART NO REC USE DESCRIPTION STOCK SPLY OR TYPE arv R18 RES COMP 51 5 1 4W 221879 01121 CB5105 6 R19 RES MTL FLM 29 4K 1 1 8W 235135 91637 MFF1 82942F 1 gt R20 RES COMP 2 7K 5 1 4W 170720 01121 2725 1 R21 RES COMP 510 5 1 4W 218032 01121 CB5115 REF R22 RES COMP 1 5 1 4W 148023 01121 CB1025 REF R23 RES COMP 510 5 1 4W 218032 01121 5115 REF R24 RES COMP 1K 5 1 4W 148023 01121 CB1025 REF R26 RES COMP 51 5 1 4W 221879 01121 5105 REF R28 RES COMP 1K 5 1 4W 188023 01121 CB1025 REF R30 RES COMP 430 54 1 4W 203869 01121 CB4315 1 R32 RES COMP 200 5 1 4W 193482 01121 2015 4 835 RES COMP 3 3K 5 1 4W 148056 01121 CB3325 6 R36 RES COMP 1 5 1 4W 148023 01121 1025 REF R37 RES COMP 200 5 1 4W 193482 01121 2015 REF R38 RES COMP 200 5 1 4W 193482 01121 CB2015 REF R39 RES COMP 3 30 5 1 4W 188056 01121 CB3325 REF R40 RES MTL FLM 30 9K 1 1 8W 235275 91637 MFF1 83092F 1 R42 RES COMP 390 5 1 4W 147975 01121 CB3915 REF R43 RES COMP 11 54 1 4W 221861 01121 CB1105 REF R45 RES COMP 1K 5 1 4W 148023 01121 1025 REF RAT RES COMP 27K 5 1 4W 148148 01121 CB2735 1 R48 RES COMP 3 3K 5 1 4W 148056 01121 CB3325 REF R49 RES COM
19. 1 458 0150 TLX 831 42856 Sri Lanka e Computerlink Data Systems Ltd 294 Union Place Colombo 2 Sri Lanka Tel 1 28641 2 TLX 954 21321 Sweden Teieinstrument AB Maltesholmsvagen 138 P O Box 4490 162 04 Vallingby 4 Sweden Tel 8 380370 TLX 854 15770 Switzerland Traco Electronic AG Jenatschstrasse 1 8002 Zurich Switzerland Tei 1 201 0711 TLX 845 815570 Syria Mabek Electronic Division Box 4238 Damascus Syria Taiwan Schmidt Electronics Corp 6th Floor Cathay Min Sheng Commercial Building 344 Min Sheng East Road Taipei 104 Taiwan Tel 2 501 3468 TLX 785 10548 Thailand e Measuretronix Ltd 2102 63 Ramkamhaeng Road Bangkok 10240 Thailand Tel 2 378 2616 TLX 788 81143 Tunisia amp Selep SARL 6 Rue de Sparte Tunis 1000 RP Tunisia Tei 1 248093 TLX 934 13030 Turkey Erkman Elektronik Aletler Ticaret Anonim Sirketi Necatiby Cad 92 3 Karakoy Istanbul Turkey Tel 11 4415461 TLX 821 24399 United Arab Emirates w Ai Sanani Cen Trad Est P O Box 7187 Abu Dhabi U A E Tei 2 821370 or 821371 TLX 958 23966 Haris Al Afaq Ltd P O Box 545 Sharjah U A E Tel 6 359120 TLX 958 68540 Uruguay Coasin Uruguaya S A Libertad 2529 Casilia de Correo 1400 Montevideo Uruguay Tet 2 789015 TLX 398 6445 USSR Amtest Associates Ltd Clarence House 31 Clarence
20. 1007 20 1007 20 1007 20 1007 20 1007 20 1007 20 1007 20 1007 20 1007 MICA 430 PF 5 5007 MICA 430 PF 5 500V MICA 430 PF 5 500V 345660 175224 175224 208983 193623 170423 148429 148387 148494 148494 148452 168344 149153 226142 148494 271866 168435 168435 168435 168435 168435 168435 168435 168435 236935 236935 148528 148528 148528 148528 170423 148528 149153 106211 168435 106674 168435 168435 168435 168435 168435 168435 168435 168435 168435 168435 177980 177980 177980 89536 12136 12136 12136 56289 72136 72136 72136 72136 72136 72136 84171 56289 72136 72136 06001 56289 56289 56289 56289 56289 56289 56289 56289 73445 73445 72136 12136 72136 72136 72136 72136 56289 72982 56289 56289 56289 56289 56289 56289 56289 56289 56289 56289 56289 56289 72136 72136 72136 MFG PART NO OR TYPE 345660 DM15E120J DM15E120J DM19F751J 196D106X0015 DM15F221J DM19F471J DM19F102J DM15F700J DM15F700J DM15F271d PE332G C0238101F103 DM15E331F DM15F7000 T5F285A105 C0238101H253 C023B101H253 C023B101H253 C023B101H253 C023B101H253 023B101H253 C023B101H253 023B101H253 ET221X01045 ET221X010A5 DM15F560J DM15F560J DM15F560J DM15F560J DM15F221J DM15F560J C023B101F103 851 0002500 272 C0238101H253 C023B102F332M C023B1018253 C023
21. 5 1 4w Res comp 3900 5 1 4w Res comp 2 72 5 1 4w Res comp 2700 5 1 4w REF 182972 207555 148445 148494 178608 184366 215251 203323 267252 285247 292912 159855 268110 193433 261651 148130 148106 188466 147876 148023 193508 236752 218032 147975 246744 160804 A4200 MCU TOT USE Rer DESCRIPTION STOCK NO LC TTL Hex inverter Buffer Driver 288605 L C DTL Quad 2 Input NAND Gate 268375 LC DTL Binary Counter 267153 Figure 6 9 CONNECTOR ASSEMBLY PCB A4200 4001 6 19 A4200 MCU USE Ti Rer DESCRIPTION STOCK NO ENS PROGRAM ASSEMBLY REF Figure 6 10 Switch Assembly 8 pushbutton 306589 Switch Assembly 9 pushbutton 306571 Figure 6 10 PROGRAM ASSEMBLY 6 20 A4200 MCU TOTIREC USE T H 1 1 6 DESCRIPTION FUNCTION ASSEMBLY PCB Figure 6 11 REF Res comp 510 5 1 4w 221879 306589 306597 267500 51 thru 58 Switch Assembly 8 pushbutton S9 thru 12 Switch Assembly 4 pushbutton Connector pin Figure 6 11 FUNCTION ASSEMBLY 6 21 A4200 MCU MANUFACTURERS CROSS REFERENCE LIST FLUKE STOCK MFR PARTNO FLUKESTOCKNO MFR MFR PARTNO 130138 366 268375 MC846P 147876 CB1505 285247 225 21821 110 147975 CB3915 288605 SN7416N 148023
22. DTL or TTL logic levels Contact or relay closures can also be used The voltage source is programmable using BCD or binary per decade coding using 8 4 2 1 format All pro gramming inputs and flag outputs are made through 50 pin Amphenol Blue Ribbon connector located on the rear panel 5 Vdc output is also available at this connector and is used to provide power for external programming cir cuitry Negative logic is employed for programming The logic levels are as follows Logic 0 42 0Vdc to 5 0Vdc or open circuit Logic 1 0 to 0 4Vdc or short circuit to LOGIC GND 14 Four options are available and provide tailoring of the power supply to fit application requirements These options are identified by numeric designations 03 06 07 and 09 Each option is described in Table 1 1 The options can be installed at the factory when the instrument is ordered or in the field at a later time 1 5 This power source is completely solid state Plug in printed circuit boards with accessible test points and adjustments are provided for ease in servicing The unit is forced air cooled This results in lower component temper atures and higher reliability than would normally be obtain ed in a source of this power capability The chassis is designed for bench top use or it can be installed in a stand ard equipment rack by using the Accessory Rack Mount ing Fixtures 1 1 4270A OPTIONS TITLE
23. MCU 4200A SERIES INSTRUMENT RANGES 50 VOLT RANGE INDICATOR BINARY 16V TABLE 6 3 CURRENT LIMIT PROGRAMMING WITH 06 OPTION 4250A 4265A CURRENT LIMIT MA RANGE mA INSTRUMENT 65 VOLT RANGE INDICATOR 110 VOLT RANGE INDICATOR 110 VOLT RANGE INDICATOR TABLE 6 4 CURRENT LIMIT PROGRAMMING WITH 06 OPTION d RANGE mA 4270A 4275A CURRENT LIMIT MA PUSHBUTTONIS DEPRESSED PUSHBUTTON S DEPRESSED Low x10 100 100 200 300 400 500 600 700 800 900 1000 INCREMENTAL 1 INCREMENTAL CHANGE 5 50 CHANGE 10 1 AND AND CURRENT LIMIT WITHOUT 06 OPTION 15 600mA CURRENT LIMIT WITHOUT 06 OPTION IS 1200mA option but do have a basic current limit of 100 mA The basic current limit of the 4250A and 4265A power sources when not using the current limit option is 1 2 amp and similarly for the 42704 and 4275A is 0 6 amp 6 45 Front Panel Indicator 646 indicator labeled LIMIT FLAG on the MCU top panel is illuminated when a current overload sink or source condition octurs in the associated power source 6 47 THEORY OF OPERATION switching circuits internal fixed frequency triggered switch ing circuits and provisions for externally controlled variable frequency triggered switching circuits that provide the logic signals to co
24. REC USE OTY OTY CDE CURRENT LIMIT PCB ASSEMBLY 06 Option Cont DESCRIPTION Res comp 36k 5 14W Res comp 39k 5 Res comp 36k 5 1W Res comp 120 596 W Res 1 2k 5 Res comp 100 5 Res ww 2 1 2W Res met flm 124k 1 1 8W Res comp 50 5 IC Hex Inverter IC Operational Amplifier 5 32 221929 188466 109736 170712 190371 147926 229542 261644 147900 268367 271502 MFG PART NO CB3635 CB3935 CB3635 1215 1225 1015 223 1 81254 5605 MC 836P LM301A 4270A Figure 5 9 PROGRAMMABLE CURRENT LIMIT 06 OPTION POWER AMPLIFIER ASSEMBLY TOT REC USE DESCRIPTION POWER AMPLIFIER ASSEMBLY 332957 332957 Figure 5 10 Cap mica 330 pf 1 500V 226142 71236 DM15F331F Cap mica 33 pf 5 500V 160317 71236 DMISE330J Cap mica 100 pf 5 500V 148894 71236 DMISF101J Cap mica 51 pf t 576 500V 277210 1236 DMISESIOJ Cap elect 10 uf 50 10 150V 106351 56289 30D397F150 Not used Cap piste 0 47 uf 10 250V 184366 73445 C280AE A470K Not used Cap mica 150 pf 5 500V 148478 DMISF151J Cap cer 0 005 uf 20 SOV 175232 Cap cer 0 01 uf 20 100V 149153 56289 00238101 F103M Cap mica 10 pf 1076 500V 175216 71236 DM15C100K 5 34 4270A POWER AMPLIFIER ASSEMBLY Cont TOT REC USE DESCRIPTION Diode Si 150
25. TLX 22284 COASN AR Australia Concord Elmeasco Instruments Pty Ltd Tel 736 2888 TLX 25887 ELSCO Austraila Mount Waverley Elmeasco Instruments Pty Ltd Tel 233 4044 TLX 36206 ELMVIC Australia Brisbane Efmeasco Instruments Pty Ltd Tet 369 8688 TLX 44062 ELMQLD Austria Vienna Walter Rekirsch Elektronische Gerate GmbH amp Co 235555 TLX 134759 Belgium Brussels Fluke Belgium SA NA Tel 2164090 TLX 26312 Brazil Sao Paulo Fluke Brasil industria E Comercio Ltda Tek 421 5477 TLX 1135589 FLKE BR Canada Calgary AB Allan Crawford Associates Ltd Tel 403 230 1341 Canada Burnaby Allan Crawford Associates Ltd Tel 604 294 1326 Canada Mississauga ON Allan Crawford Associates Ltd Tel 416 678 1500 Canada St Laurent PQ Allan Crawford Associates Ltd Tet 514 731 8564 Chile Santlago Intronica Chile Ltda Tel 44940 TLX 240301 China Beijing Beijing Radio Research Institute Tel 445612 Colombia Bogota Sistemas E instrumentacion Ltda Tel 232 4532 TLX 45787 COASN CO Denmark Ballerup Tage Olson A S Tei 658111 TLX 35293 TOAS DK Ecuador Quito Proteco Coasin Cia Ltda Tei 529684 526759 TLX 2865 PROTEC ED Egypt Cairo Electronic Engineering Liaison Office Tei 895706 TLX 23082 England Watford Herts Fluke Great Britain LTD Tel 40511 TLX 934583 Finland Espoo instrumentarium Electronics Tel 5281 TLX 124426 HAVUL
26. Table 4 1 RECOMMENDED TEST EQUIPMENT NOMENCLATURE EQUIPMENT AC DC Voltmeter FLUKE Model 887A Manual Control Unit FLUKE Model 4200 AC Source 3 0 0296 of FLUKE Model 510A output 400 Hz Option 04 Resistive Load 10 ohm 1 20w Required only if 03 Option is installed Required only if 06 Option is installed 4 19 initial Procedure a Turn off the instrument and remove the top dust cover screws Leave the dust cover in place b Connect the Model A4200 Manual Control Unit MCU to the programming connector on the rear of the instrument CAUTION The Model A4200 Manual Control Unit MCU is not compatible with 4200 series instruments equipped with the 09 Option DO NOT con nect the MCU to these instruments 43 4270A XFMR 1 1 1 10 2 4 A7 A2 B15 EXT REF GAIN B4 EXT REF ZERO 4 A8 ZERO PROGRAM I LIMIT 2 1052 HIDDEN lt A10W1 231 XA2F1 252 951 2 1 2 A641 Figure 4 1 ASSEMBLY ADJUSTMENT AND TEST POINT LOCATIONS 44 Table 4 2 BINARY BY DECADE CODING DECADE CODING OUTPUT VOLTAGE VDC 10V RANGE 10 RANGE D DECADE C DECADE orn A DECADE BN CAUTION On the rear panel barrier strip the following terminals must be jumpered OUTPUT HI to SENSE HI and SENSE LO to OUTPUT LO to GUARD c Turn on the
27. ZHAOL iv 70 80 ain 390915 O1nv vin M3lH3ANI 3991 50 90 YOLVYSNAD 380815 iv ZLS 015 1X3 115 OLN SAHOLIMS 103 405 3 lt ul A V 65 HOLIMS 380815 V vr 4200 MANUAL CONTROL UNIT BLOCK DIAGRAM FIGURE 6 5 6 8 vide manual control of the programming inputs into the 4200A series power sources Switching by the following groupings of switches accomplishes this purpose control groupings of switches accomplishes this purpose control mode switches magnitude program switches and function program switches The secondary function of the MCU is to provide an automatic mode of operation that applies a manually selected and manually variable magnitude program repetitively at a fixed or variable rate to a power source This is accomplished by the following a 10kHz oscillator the control mode switches and 4 bit binary counter The manual and auto strobe generators provide control of the strobing pulse for both the manual and automatic modes of operation 6 52 With manual mode selected by control mode switch 512 the four bit counter is supplied with a logic O low This sets all four outputs of the counter to a logic 1 high Inverter U2 reverses the logic 1 on all four counter output lines to a logic 0 and then applies them in parallel through all closed magnitude p
28. and U13 5 to gate the serial program data appearing at the multiplexer outputs to the primaries of and T3 The clock pulses are also fed directly to the primary of T2 The transformers couple the signals across the guard On the in side of the guard the clock pulses are applied to three eight bit shift registers causing the registers to load the serial pro gram data Shift registers U20 load the 16 bits of output magnitude data while U22 loads twice up to eight bits of control data The parallel outputs of U20 and U21 are applied directly to the ladder network assembly A5 while the parallel outputs of U22 are applied to a series of latch circuits To load the control data into the latch circuits the first of the 16 clock pulses triggers a latch timing one shot which has a period of two microseconds This one shot is not re triggerable by the subsequent clock pulses and the trailing edge of the output pulse occurs after the clock pulses 3 8 and serial transfer of data into the shift registers is complete The trailing edge triggers the latch load one shot to parallel load the eight bits of control data from the shift register into the latch circuits for application to the control circuits within the power source NOTE Complementing magnitude data occurs only in binary type power sources 3 84 COMPLEMENTING BINARY DATA 3 85 Binary type power sources require that negative value of magnitude data be two s complemented
29. side of the unit 6 89 Remove the switch panel from the MCU top panel Each of the individual pushbutton switches are accessible for individual continuity checks The upper switch bank is mounted on the Program PCB Assembly and the lower switch bank is mounted on the Function PCB Assembly Prior to further disassembly note the relationship of the program PCB and function PCB to the end flanges of the MCU top panel Viewed from the rear with program PCB uppermost the cluster of four P nuts must be on the right flange 6 90 Removal of two Phillips Head screws from each of the ends of the program and function PCB s permit removal of these two boards with attached pushbutton switch banks 6 91 Assembly of the MCU is done in reverse order of disassembly with attention to the proper locating of the program and function PCB s on the switch panel as noted in step 6 89 Reversal of these two PCB s is possible but will not permit final assembly of the top panel 6 92 Switch Maintenance 6 93 The following eleven paragraphs describe the pro cedure to be followed when a defective switch is to be re placed in the MCU 6 94 Remove the PCB assembly that contains the de fective switch using the maintenance access procedures given in the previous paragraphs 6 95 Since individual pushbutton switches are not re placeable an entire switch set that contains the defective switch must be replaced as a unit 6 96 Refer to the List o
30. to enable the complement logic depending upon the state of the J input which is derived from the serial data Asa result the complement flip flop goes set at the time of the first true bit of serial data is enable the inverting logic and complement the remaining bits of serial data After the 16th bit of data the complementing flip flop is reset by the carry output of the 16 counter 3 87 STANDBY OPERATION 3 88 The power source can be commanded to standby or operate mode at any time by the program source As shown in Figure 3 5 the standby command dc is gated to the start input of the 10 MHz clock The clock is turned on and generates pulses as long as the standby signal is present The start stop flip flop remains reset from the last transfer sequence to enable gate U14 3 and pass the clock pulses via T4 to a half wave rectifier on the inside of the guard The dc output of the rectifier becomes the standby signal for control of the power source During standby operation data transfer does not take place due to the start stop flip flop being reset and gate U12 8 being inhibited 3 89 CURRENT LIMIT FLAG 3 90 The current limit flag produced by the A9 Power Amplifier whenever the power source is in the current limit mode is used to enable a 1MHz oscillator U19 which pro duces pulses at a IMHz rate The pulses are fed via T6 to the trigger input of a re triggerable one shot having a period of 1 1 microseconds As lo
31. 1 logic ground on its cathode A logic 1 is applied to the cathode from the programmable power source via the interface cable and programming con nectors on Pin 49 when an overtoad overcurrent condition exists in the power source 6 78 MAINTENANCE 6 79 Introduction 6 80 The maintenance procedures given in the following paragraphs describe maintenance access pushbutton replace ment LIMIT FLAG indicator replacement and trouble Shooting 6 81 Maintenance Access 6 82 Remove six Phillips Head screws from sides of chan nel bottom Remove four Phillips Head screws securing rubber feet to bottom of unit 6 83 Withdraw V shaped channel bottom from MCU Test points 1 through 5 are now accessible at bottom of unit on the component side of the motherboard connector PCB Assembly 6 84 Remove two Phillips Head screws from rear left side of unit 6 85 Remove motherboard Connector PCB Assembly from the unit with a gentle rocking and pulling motion to separate motherboard from the two other PCB s in the unit 6 11 A4200 MCU 6 86 Disconnect coaxial jack cluster connectors at the underside of the Function Assembly PCB These four connectors may be colored BLK RED BRN and ORN 6 87 Disconnect leads to LIMIT FLAG light emitting diode also on the same PCB These two leads may be col ored ORN and YEL 6 88 Remove two Phillips Head screws from the right side of the unit and two remaining screws from the left
32. 18 330936 GB8225 Not used Res comp 6 8k 5 4W 187906 EB6825 Res comp 51 5 W 144717 EB5105 Switch slide dpdt 234278 XW1649 Conn recpt amp 267534 85884 3 Conn Post 267500 86144 2 Heatsink use with Q2 Q3 104646 207 AB Heatsink 334524 334524 Socket Xstr 342816 91506 X8080 1G10 540 4270A ied Figure 5 11 H V POWER SUPPLY AND CONNECTOR BOARD 541 542 4200 Series Section 6 Option amp Accessory Information 61 INTRODUCTION 6 2 This section of the manual contains information pertaining to the accessories and options available for your instrument 6 3 OPTION INFORMATION 6 4 Each of the options available for this instrument if any are described separately under headings contain ing the option number The option descriptions contain _ eee applicable operating and maintenance instructions and field installation procedures A complete list of re placeable parts for each option is contained at the end of that option description 6 5 ACCESSORY INFORMATION 6 6 The accessory information if applicable will contain details concerning accessories that may be used with this particular instrument 6 1 6 1 INTRODUCTION 6 2 07 Option provides 100uV resolution E Decade throughout the voltage range of 0 to 16 6665V dc in the Model 4210A Status of the E decade is not pro vided on the front panel display 6 3 SPECIFICATIONS 64 Specifications for th
33. 1V reference to the gate of a Programmable Unijunction Transistor Q16 When the charge on C33 reaches approximately 0 5V the gate to anode of Q16 is forward biased causing it to turn on and latch C33 now begins to rapidly discharge through Q16 and 258 The voltage developed across R58 drives the input of 015 toward OV causing its output to drive close to 5V and clear shift registers U20 U21 and U22 As the discharge of C33 is almost complete the voltage drop across R58 approach es zero volts allowing the input of Q15 to retum to a 5V level The output of Q15 then returns to OV completing the preset pulse Q16 however remains latched because of the small holding current supplied through R57 3 79 DATA TRANSFER SEQUENCE 3 80 parallel program data output voltage magni tude sign output voltage range current limit magnitude and external reference function is applied to the inputs of a series of multiplexing circuits as shown in Figure 3 5 When the data is settled at the multiplexer inputs the pro gram source generates a strobe signal having a duration of nanoseconds or longer The strobe pulse is fed via an in tegrator to the trigger input of a delay one shot The inte grator provides noise immunity and triggers the delay one shot when it receives a pulse having a width of 800 nano seconds or greater The delay one shot produces an 800 nanosecond pulse the leading edge of which triggers the hold one shot via
34. 3 233 4044 TLX 790 36206 Elmeasco Instruments Pty Ltd Professional Suites Bldg G P O Box 2360 Brisbane 4001 Australia Tel 7 369 8688 TLX 790 44062 Elmeasco Instruments Pty Ltd G P O Box 1240 Adelaide South Australia 5001 Tel 8 271 1839 Elmeasco Instruments Pty Ltd Box 95 Gosnelis West Australia 6110 Australia Tel 9 398 3362 Austria Walter Rekirsch Elektronische Gerate GmbH amp Co Vertrieb KG Obachgasse 28 1220 Vienna Austria Tei 222 235555 TLX 847 134759 Bangladesh e Motherland Corporation 24 Hatkhola Road Tikatuli Dacca 3 Bangladesh Tel 257249 TLX 950 642022 Belgium Fluke Belgium S A 6 Rue de Geneve 1140 Brusseis Belgium Tel 2 2164090 TLX 846 26312 Bolivia Coasin Bolivia S R L Casilla 7295 La Paz Bolivia 2 40962 336 3233 Brazil e Fluke Brasil industria e Comercio Ltda Al Amazonas 422 Aiphaville Baruerl CEP 06400 Sao Paulo Brazil Tel 11 421 5477 TLX 391 1135589 Fluke Brasil industria e Comercio Ltda Av Henrique Valadares No 23 401 Rio de Janeiro Brazil Tel 21 252 1297 Brunei Rank O Connor s Berhad Ltd No 8 Block D Sutri Complex Mile 1 Jalan Tutong Bandar Seri Begawan Negara Brunel Darussalam Tel 2 23109 or 23557 TLX 799 BU2266 RANKOC Canada Ailan Crawford Assoc Ltd 6503 Northam Drive Mississauga Ontario
35. 523030 REF Q10 XSTH SI NPN 159855 07910 CS23030 REF 11 XSTR SI NPN 159855 07910 CS23030 REF 012 XSTR SI NPN 159855 07910 6523030 REF Q13 XSTR SI UNIJUNCTION 268110 03508 2N6027 1 d 014 XSTR SI NPN 159855 07910 CS23030 REF Q16 XSTR SI NPN 159855 07910 CS23030 REF 917 XSTR SI NPN 159855 07910 CS23030 REF Q18 XSTR SI NPN 159855 07910 6823030 919 XSTR SI NPN 159855 07910 523030 REF 920 XSTR SI NPN 159955 07910 CS23030 REF Q23 XSTR SI NPN 168716 12040 SM07155 1 Q25 XSTR SI PNP 195974 04713 2N3906 1 1 026 XSTR SI NPN 159855 07910 523030 REF Q27 XSTR SI NPN 159855 07910 6523030 REF Ri RES COMP 1 5 1 4W 148023 01121 CB1025 12 R2 RES COMP 10K 5 1 4W 148106 01121 1035 2 R3 RES COMP 510 54 1 4W 218032 01121 CB5115 8 RES COMP 10 5 1 4W 148106 01121 1035 REF R5 RES COMP 470 5 1 4W 234252 01121 CB1325 1 R6 RES COMP 1 3K 53 1 4W 234252 01121 1325 1 RT RES COMP 390 5 1 4W 147975 01121 CB3915 5 RES COMP 390 5 1 4W 147975 01121 CB3915 REF R9 RES COMP 510 5 1 48 218032 01121 CB5115 REF R10 RES COMP 510 5 1 4W 218032 01121 5115 REF R11 RES MTL FLM 6 98K 1 1 8W 261685 91637 MFF1 86981F 2 R13 RES COMP 510 5 1 4W 218032 01121 CB5115 REF R14 RES COMP 390 5 1 4W 147975 01121 CB3915 REF R15 RES MIL FLM 4 99K 1 1 8W 168252 91637 1 84991 2 R16 RES COMP 11 5 1 4W 221861 01121 CB1105 2 17 RES MTL FLM 4 99K
36. A S Ballerup Byvej 222 2750 Ballerup Denmark Tel 2 658111 TLX 855 35203 Ecuador e Proteco Coasin Cia Ltda Box 228 Ave 12 de Octubre 2285 y Orellana Quito Ecuador Tel 2 529684 TLX 393 2865 Proteco Coasin Cia Ltda P O Box 9733 Ave Principal No 204 y Calle Segunda Urbanizacion Miraflores Guayaquil Ecuador Tel 4 387519 Egypt and Sudan m Electronic Engineering Liaison Office P O Box 2891 Horreya 11361 Heliopolis Cairo Egypt Tel 2 695705 TLX 927 23082 England w Fluke GB Ltd Colonial Way Watford Herts WD2 4 England Tel 823 40511 TLX 851 934583 Fiji e Awa Fiji 47 Forster Road Walu Bay Suva Fiji Tel 312079 TLX 792 FJ2347 Finland instrumentarium Electronics P O Box 64 02631 Espoo 63 Finland Tel 0 5281 TLX 857 124426 France amp M B Electronique S A Rue Fourney P O Box 31 78530 BUC France Tek 3 956 8131 TLX 842 695414 German Democratic Republic w Amtest Associates Ltd Clarence House 31 Clarence Street Staines Middlesex TW18 4SY England Tel 784 63555 TLX 851 928855 Germany West Fluke Deutschland GmbH Oskar Messter Strasse 18 WG 8045 Ismaning Munich West Germany Tel 089 96050 TLX 841 0522472 Rapifax 49 89 9605166 Fluke Deutschland GmbH Viertriebsburo Dusseldorf Meineckestrasse 53 D 4000 Dusseldorf 30 West Germany Tel 0211 450831 TLX 841 085855
37. BCD groups as determined by the weighting assigned each switch i e 8 4 2 and 1 Thus in the four decades all similar weighted switches are paralleled on their normally open contacts 6 63 Binary counter U3 supplies 1 24 8 logic levels through inverting gates U2D through A to the 1 2 4 8 switch busses respectively The logic levels are dependent on the state of the binary counter In manual mode the outputs of U3 are forced high 5 volts Therefore the outputs of the inventory gates supply a low 0 volts to the switch busses However in auto or external mode the switch buss es are switched between high and low in a binary sequence and at a frequency determined by the 10kHz multivibrator or by an external frequency applied at the trigger input jack 6 64 FOUR BIT BINARY COUNTER 6 65 four bit binary counter U3 is an asynchronous negative edge triggered counter The outputs 1 2 4 8 of the counter are connected to the correspondingly weighted busses of the sixteen magnitude program switches through the inverting gates of U2 The outputs of the counter are low at zero and go high in binary sequence The clock required to advance the counter is supplied through the control mode switches by the 10kHz multivibrator or by an external pulse generator connected to trigger input jack J4 6 66 TEN KILOHERTZ MULTIVIBRATOR 6 67 The 10kHz multivibrator is a simple dual transistor 01 02 multivibrator designed to f
38. CB1025 292912 225 21021 110 148106 1035 303354 303354 148130 2235 303701 303701 148445 CD15F330J 303743 303743 148494 CD15F1017 303750 303750 152033 UG1094A U 303719 303719 159855 CS23030 303727 303727 160804 CB2715 303768 303768 178608 C437ARC640 306571 306571 182972 PE 472 G 306597 306597 184366 C280AE A470K 306589 306589 188466 CB3935 309617 FLV102 193433 CB2425 309625 FVC 001T 193508 CB3025 203323 DHD1105 207555 DMF28S47 215251 CD19F641J 218032 CB5115 221879 CB5105 236752 Type MFF 1 8 bey 246744 CB27G5 261651 Type MFF 1 8 267153 MC839P 6921 267252 57 40500 267500 86144 2 268110 D13T1 4200 Rack Mounting Accessory Rack Mounting Fixtures 6 1 INTRODUCTION 6 4 Half Rack Width Mountings 6 2 The Accessory Rack Mounting Kits are of two 6 5 half rack width mountings are shown Fig general types half rack width and full rack width The ure 6 1 as A B and C The full rack mounting is shown as half rack width mountings are further divided into dual D To install the mountings shown in Figure 6 1 B mountings center mountings and offset mountings Chassis through D proceed as follows Slide Kits which enable withdrawl of the rack mounted instrument for inspection and servicing can be installed on full width rack instruments and on half rack width instru b ments when in the dual mounting configuration Figure 6 1 shows the variations possible in rack mountings and the c
39. Co inc 5640 Fishers Lane Rockville MD 20852 301 770 1570 Mi Detroit John Fluke Mfg Co Inc 33031 Schoolcraft Livonia Mi 48150 313 522 9140 MN Bloomington John Fluke Mfg Co Inc 1801 E 79th St Suite 9 Bloomington MN 55420 612 854 5526 MO St Louis John Fluke Mfg Co Inc 2029 Woodland Parkway Suite 105 St Louis MO 63141 314 993 3805 NC Greensboro John Fluke Mfg Co Inc 1310 Beaman Place Greensboro NO 27408 919 273 1918 NJ Paramus John Fluke Mfg Co Inc P O Box 930 West 75 Century Road Paramus NJ 07652 201 262 9550 NM Albuquerque John Fluke Mfg Co Inc 1108 Alvarado Drive Albuquerque NM 87110 505 881 3550 NY Rochester John Fluke Mfg Co Inc 4515 Culver Road Rochester NY 14622 716 323 1400 OH Cleveland John Fluke Mfg Co Inc 7830 Freeway Circle Middleburg Heights OH 44130 218 234 4540 Columbus 614 889 5715 Dayton John Fluke Mfg Co Inc 4756 Fishburg Rd Dayton OH 45424 513 233 2238 OK Tulsa 918 749 0190 OR Portland John Fluke Mfg Co Inc 2700 NW 185th Suite 2080 Portland OR 97229 503 629 5928 PA Philadelphia John Fluke Mfg Co Inc 1010 West 8th Ave Suite H King of Prussia PA 19406 215 265 4040 Pittsburgh 412 261 5171 TX Austin 512 459 3344 Dallas John Fluke Mfg Co Inc 14400 Midway Road Dallas TX 75234 214 233 9990 Houston John Fluke Mfg Co Inc 4240 Biue Bonne
40. FUNCTION PROGRAM SWITCHES JACK gt SWITCHES 5 3 CLUSTER of power d imee rena 5 i T E 3 Ext RET STANDBY 4 SWITCH AUTO E 4 40 20 10 Enters SWITCH MCU Selects TRIGGER TRIGGER CURRENT data auto INPUT OUTPUT LIMIT when Program eceives Provides SWITCHES pressed control external scope IN BLK FOR 4250A amp 4265 jns program sync amp USED WITH 06 OPTION P control allows MANUAL trigger RED FOR 4270A amp 4275A STANDBY SWITCH His 9 USED WITH 06 OPTION SWITCH Selects EXTERNAL viewing Selects Switches select limit range standby inode Manual zn and level of I limit program IN where contro external output is IN program LIMIT FLAG INDICATOR lt 1 of control Displays limit condition programmed IN of power source out by switches level EXTERNAL REFERENCE SWITCH Selects the external reference mode IN 03 Option Figure 6 2 CONNECTORS CONTROLS AND INDICATORS 6 3 A4200 MCU CAUTION Application of trigger voltages higher than the recommended value will damage the MCU DC OFFSET AMPLITUDE 2 8 WIDTH Figure 6 3 External Trigger Generator Requirements 6 19 Trigger Output 6 20 TRIGGER OUTPUT jack provides an output con nection for monitoring the inverse of the MCU generated STROBE pulse The output trigger is a positive going pulse
41. Jumpering pad to 4 and pad l to 13 establishes dual strobe operation The standard dua strobe BCD configuration requires a jumper from pad 22 to pad 23 for the negative true 0V data word strobe and a jumper from pad 6 to pad 7 for the negative contro word strobe pulse For a positive SV data word strobe pulse jumper pad 23 to pad 24 for a positive contro word strobe pulse jumper pad 5 to pad 7 Refer to Figure 609 4 609 50 Data word and control word Strobe Pulses in both the single and dual strobe modes are ps or longer in width Data on all programming lines must be valid 4 79 prior to the leading edge of the pulse and it must remain unchanged for 100 ns after the strobe pulse trailing edge A data word strobe in the dual strobe mode is issued after data is applied to the parallel data word inputs of the 4200 09 assembly It loads the data bits into the parallel storage registers In the dual strobe mode the control word strobe loads only the control word from the program source into the storage registers in the single strobe mode the control word strobe pulse loads the data word into the registers when the strobe control line is at one logic level then it loads the control word into the registers when the strobe control line is at the opposite logic level 609 51 PROGRAM DATA TRANSFER 609 52 A control word strobe or data word strobe generated by the program source loads program data into the 4200 09 st
42. L4V 142 Canada Tei 416 678 1500 TLX 06968769 Allan Crawford Assoc Ltd 7018 Cote de Liesse St Laurent Quebec 1 amp 7 Canada Tet 514 731 8564 TLX 05824944 Allan Crawford Assoc Ltd 881 Lady Ellen Place Ottawa Ontario K1Z 5L3 Canada Tel 613 722 7682 TLX 0533600 Allan Crawford Ltd Suite 106 4180 Lougheed Hwy Burnaby British Columbia 5 6A8 Canada Tel 604 294 1326 TLX 0454247 Atian Crawford Assoc Ltd 1935 30th Avenue Calgary Alberta T2E 625 Canada Tel 403 230 1341 TLX 03821186 Chile Intronica Chile Ltda Manuel Montt 024 Of D Casilla 16228 Santiago 9 Chile Tei 2 44940 TLX 332 240301 China Peoples Republic of 9 Fiuke International Corp P O Box C9090 M S 206 A Everett WA 98206 U S A Tel 206 356 5511 TLX 185103 FLUKE UT Colombia Sistemas E Instrumentacion Ltda Carrera 13 No 37 43 Of 401 Ap Aereo 29583 Bogota DE Colombia Tei 232 4532 TLX 396 45787 Cyprus w Chris Radiovision Ltd Box 1989 Nicosia Cyprus Tel 21 66121 TLX 826 2395 Cyprus Northem Ucok Buroteknik 2C amp 2D Ziyai Street Lefkosa Northern Cyprus Mersin 10 Turkey Tel 741 357 20 71777 TLX 821 57267 Czechoslovakia w Amtest Associates Ltd Clarence House 31 Clarence Street Staines Middlesex TW18 4SY England Tel 784 63555 TLX 851 928855 Denmark Tage Olsen
43. O s 80 of range Magnitude 0 10 of range 40 of range Magnitude 0 2096 of range Magnitude 0 10 of range NOT USED CURRENT OVERLOAD FLAG LOGIC 0 NORMAL LOGIC 1 OVERLOAD Over Current NOT USED gt Least significant digit when 07 Option 100uV Resolution is not used E use of 07 Option substitutes for 06 Option and provides least significant digits in an E Decade i e ES E El volt range which has a program resolution of 10mV it Should be noted that the maximum input program can ex ceed the output voltage capability of the power source The maximum program using four bit binary per decade coding in 8 4 2 1 format is 166 65 volts while BCD coding provides a maximum program of 99 99 volts The max imum output voltage however is 110 volts 2 32 Polarity of the output is controlled by a single in put SIGN at pin 35 of the program connector A Logic 0 will produce a positive output A Logic 1 will pro duce a negative output 2 33 Data Strobe 2 34 DATA STROBE shown in Figure 2 8 is required to initiate the transfer of the data present at the programm ing inputs to the internal memory of the Isolated Control Logic 01 Option The DATA STROBE is applied to pin 33 of the programming connector Upon its negative trans ition program data transfer begins At the same time two pulses are generated 15 and 110us The 15us pulse holds the power supply output
44. Program Data Typical 16 Bit and 8 Bit Data Words 609 14 4 79 609 33 Binary BCD Program Operations 609 34 Program functions discussed in the following paragraphs apply to both BCD and Binary operation 609 35 VOLTAGE SOURCE ADDRESSING 609 36 A 4200 09 Voltage Source receives program data only if it is addressed at the time it receives a strobe signal The address signal may be either a high 5V or low OV dc logic level applied to address line number zero Each Binary source in the standard configuration requires a positive true address each BCD source in the standard configuration requires a negative true address For positive true address levels jumper pad 8 to pad 10 For negative true address levels jumper pad 9 to pad 10 609 37 maximum of eight 4200 09 Voltage Sources may be individually addressed by one program source Refer to Figure 609 2 for the multiple voltage source cable connection configuration The voltage source electrically closest to the program source is numbered zero and succeeding voltage sources are numbered consecutively one through seven The program source supplies an address signal to each voltage source for the duration of its programming sequence on one of eight address lines 0 7 609 38 Although the program source addresses the voltage sources on eight separate lines each voltage source receives its address signal on address line zero All eight program source addresses are
45. R Co Ltd Don Mills Ontario Canada M3B 1M2 02606 Fenwai Labs Div of Travenal Labs Morton Grove Illinois 02660 Bunker Ramo Corp Conn Div Formerly Amphenol Borg Electric Corp Broadview Illinois 02799 Areo Capacitors Inc Chatsworth California 03508 General Electric Co Semiconductor Products Syracuse New York 03614 Replaced by 71400 03651 Replaced by 44655 03797 Eldema Div Genisco Technology Corp Compton California 03877 Transistron Electronic Corp Wakefield Massachusetts 03888 KDI Pyrofilm Corp Whippany New Jersey 03911 Electronics Div Clairex Corp Mt Vernon New York 03980 Muirhead Inc Mountainside New Jersey 04009 Arrow Hart Inc Hartford Connecticut 04062 Repiaced by 72136 04202 Replaced by 81312 04217 Essex International Inc Wire amp Cable Div Anaheim California 04221 Aemco Div of Midtex Inc Mankato Minnesota 04222 AVX Ceramics Div AVX Corp Myrtle Beach Florida 04423 Telonic industries Laguna Beach California 04645 Repiaced by 75376 04713 Motorola Inc Semiconductor Products Phoenix Arizona 04946 Standard Wire amp Cable Los Angeles California 05082 Replaced by 94988 05236 Jonathan Mfg Co Fullerton California 05245 Components Corp now Corcom Inc Chicago Illinois 05277 Westinghouse Electric Corp Semiconductor Div Youngwood Pennsylvania 05278 Repl
46. R29 and R31 Their indi vidual resistance values weigh the division factor necessary to scale in respective A8 A4 A2 and A1 bit weights Selection of individual ladder resistors in done through associated ladder switches Variable resistors R28 R30 and R32 allow precise calibration of the A4 A2 and A1 ladder bits to the A8 bit The resulting scaled from these ladder bits is combined with the A5 Binary Ladder input through R25 and applied to the input of Q18A Feedback from the HIGH SENSE terminal at the output of the power source through resistances selected by the Voltage Range Switches drives the input to Q18 to virtual analog common in the manner of a high gain operation amplifier 3 44 LADDER SWITCHES AND DRIVERS 3 45 The Ladder Switches and Drivers Q1 through 016 apply VREF or analog common V A common to the ladder resistors under control of the A8 A4 A2 and A1 bit com mands Each Ladder Switch Driver combination functions in the same manner thus only operation of the A8 bit is described 3 46 8 ladder resistor is connected to or analog common through Q1 and Q2 or Q3 respectively When an A8 command OV exists at terminal 18 of P1 bot Q4 and 05 will be siwtched off Q3 is switched off by its resulting V A gate voltage and Q1 Q2 are switched on by the resulting Vp gate voltage With Q1 and Q2 conducting is applied to R26 Absence of an command applies 5V to t
47. Shift Versus Frequency 2 9 2 12 AC External Reference Harmonic Distortion Versus Frequency 2 9 3 1 Power Source Equivalent Circuit s s s s e e ls 3 1 3 2 Model 4270A Block Diagram 2 2 2 3 2 3 3 Ladder Decade Simplified 0 3 6 34 Ladder Driver Simplified 2 e e 0 3 7 3 5 Isolated Control Logic Simplified 3 9 4 1 Assembly Adjustment and Test Point Locations 44 5 1 Binary Programmable PowerSource s s s e s ot 5 5 5 2 Mother Assembly 5 6 5 3 Power Supply PCB Assembly s s s e s s l l ls 541 5 4 Pre Amplifier Assembly oo c 5 16 5 5 External Reference PCB Assembly 03 Option ug d sap fia TAS arde 5 19 5 6 Binary Ladder Assembly s e l l ln 5 23 5 7 Isolated Control 5 27 continued on page iv iii 4270A LIST OF ILLUSTRATIONS continued FIGURE 5 8 5 9 5 10 5 11 6 1 6 2 6 1 6 2 6 3 64 6 5 6 6 6 7 6 8 6 9 6 10 6 11 6 1 62 6 3 64 64 TITLE PCB Display PCB Assembly Programmable Current Limit 06 Power Amplifier EE H V Power Supply and Connector Board OPTION 07 100uV RESOLUTION Ladder Decade Simplified BCD Ladder PCB Assembly MODEL A4200 Model A4200
48. T5 to produce an eight or 16 micro second pulse to the hold input of the power source The width of the hold one shot output pulse depends upon the particular power source model That is the 4210A and 4216A require an eight microsecond hold pulse while the remaining models require a 16 microsecond hold pulse In either case the hold pulse is used within the A3 assembly to hold the output voltage magnitude constant while pro gramming is underway 3 81 trailing edge of the delay one shot output trig gers the not ready one shot and sets the start flip flop The not ready one shot generates a 100 microsecond pulse which 3 7 42704 becomes the not ready flag output to the program source The not ready flag indicates that the 4200 09 is busy and not available to accept program data or strobe signals from the program source When the start stop flip flop becomes set the Q output provides a start signal voltage level to the start stop input of a 10 MHz clock The output of the start stop flip flop is also fed to an input of gate U12 8 to gate the clock output pulses to various portions of the con trol logic to transfer the program data across the guard Con currently the Q output of the start stop flip flop inhibits gate U14 3 to prevent clock pulses from reaching the pri mary winding of T4 This function is described in later paragraphs 3 82 10 MHz clock pulses gated by U12 8 are fed to the input of a 16
49. U2366E Matched Pair 306381 306381 Xstr J FET N channel U2366E Matched Pairs 306373 306373 Q14 matched to Q16 Q18 matched to Q20 Xstr J FET N channel U2366E Matched Set 298299 298299 ips Xstr J FET N channel 261578 U2366E Res var cermet 200 10 W 285148 3605 201 Res ww 24 987k Res ww 49 975k Res ww 100 025k Matched Resistor Set 289827 289827 Res ww 200 075k Res ww 108k DESCRIPTION Res var cermet 50 10 Res met flm 60 4 1 1 8W Res ww 24 987k 0 03 14W Res ww 50k 0 03 W Res met flm 100 03k 0 1 1 8W Res met flm 200 08k 0 1 1 8W Res met flm 108 06k 0 1 1 8W Res met flm 49 9k 0 1 1 8W Res met fim 24 9k 0 1 1 8W Res met fim 100k 0 5 1 8W Res met flm 200k 1 1 8W Res met fim 120k 1 1 8W Res comp 1 8k 5 Res comp 20k 5 W Res comp 2 7k 5 W Res comp 560 5 14W 285122 235366 289769 289777 291088 290122 290114 291070 290106 291054 261701 291062 175042 221614 170720 147991 4270A MFG PART NO 3608 500 MFF1 860 4F 289769 289777 1 810032 MFF1 8200R08 B MFF1 8108R06 B MFF1 849R9B MFF1 824R9B MFF1 8104 MFF1 8204F 8124 1825 CB2035 CB2725 5615 5 21 42704 FLUKE TOT REC USE DESCRIPTION ena 193334 01121 CB5135 Res comp 51k 5 42704 ui TA ie v Qe 4
50. amp Printed Circuit Board Part Number f Instrument Model and Serial Number 4270A MEG DESCRIPTION PART NO BCD PROGRAMMABLE POWER SOURCE Figure 5 1 Mother PCB Assembly Figure 5 2 332908 332908 Power Supply PCB Assembly Figure 5 3 332940 332940 Pre Amplifier PCB Assembly Figure 5 4 332924 332924 External Reference PCB Assembly 292581 292581 03 Option Figure 5 5 BCD Ladder Assembly Figure 5 6 292565 292565 Isolated Control Logic Figure 5 7 365692 365692 BCD Display PCB Assembly Figure 5 8 302257 302257 Current Limit PCB Assembly 06 Option 332965 332965 Figure 5 9 Power Amp PCB Assembly Figure 5 10 332957 332957 High Voltage Power Supply Assembly 333005 333005 Figure 5 11 Card Guide 229047 229047 Card Guide 256461 256461 Chassis Side 296962 296962 Connector programming male 50 contact 307017 307017 Cover bottom 308122 308122 Cover guard 331884 331884 Decal corner 296269 296269 Decal Handle trim 295493 295493 Decal front panel 302034 302034 Decal rear panel 334516 334516 Decal side trim 295386 295386 Fan muffin venturi 103374 103374 Filter 313056 313056 Handle corner front 295667 295667 Housing filter 314047 314047 DESCRIPTION Panel front Panel rear Tray guard MFG PART NO 302034 302034 302042 337493 337493 42704 Figure 5 1 BINARY PROGRAMMABLE POWER SOURCE 55 5 6 4270A MFG FLUKE DESCRIPTION STOCK PART NO NO MOTHER PCB ASSEMBLY 3
51. at the places specified above indicates a defective interface cable connectors or a defective 1 motherboard A1 Con nector PCB Assembly Refer to the schematic diagram and localize the fault to either the interface cable connectors or to Al PCB as appropriate 10kHz MULTIVIBRATOR CHECK Check the output of the 10kHz multivibrator by measuring between test points 1 and 3 either with a multimeter set to 2 5Vdc for full scale deflection or if a waveform inspection is desired connect the input of the scope to these test points and observe the square wave out put as shown in Figure 6 6 If neither voltage nor waveform is present the multivibrator may be locked up In this case remove power from the MCU and reapply as a step function to initiate flip flop action of the multivibrator Check output again and if none is observed the multivibrator circuit is defective MANUAL SWITCH FOUR BIT BINARY COUNTER AND GATED INVERTER U2 Locate pins 9 through 12 on the rear of the interface cable connector attach ed to the Al motherboard Select one of the four pins for 5Vdc full scale deflection measurement on the meter Use test point 3 for ground reference Depress and latch the C decade pushbuttons Depress and latch the MANUAL pushbutton and check that the multimeter reads about OVdc Check for on the other three pins Release MANUAL and check that the multimeter reads 5Vdc on each pin Failure to read any
52. composed of 08 and Q5 When input power is applied the supply rises to its regulated level of 5 volts At this point C5 has not been charged and Q8 and 05 are turned off leaving the preset line high C5 driven by the current from the 5V supply begins to charge C5 at a linear rate The voltage divi der composed of R9 and R10 provides a 4V reference to the gate of a Programmable Unijunction Transistor Q8 When the charge on C5 reaches approximately 4 5V the gate of anode Q8 is forward biased causing it to turn on 4270A and latch C5 now begins to rapidly discharge through Q8 and R11 The voltage developed across R11 is sufficient to turn on 05 which causes the preset line to go low thereby presetting all input programming circuitry When the dis charge of C5 is almost complete the voltage drop across R11 can no longer supply base drive to Q5 it therefore turns off allowing the preset line to return to its high state 3 78 second Preset Generator is used to preset the shift registers in the isolated portion of the logic circuitry It is composed of Q16 and 015 and is less complex than the preset generator previously described When input power is applied the Vr supply rises to its regulated level of 5V At this time 016 is not conducting C33 is not charged and the output of U15 is 1 C33 now begins to charge at an exponential rate through R57 R54 and R55 form a voltage divider which provides a
53. four bit binary counter At the time of the sixteenth clock pulse the counter reaches full count and generates a carry pulse to the reset input of the start stop flip flop and also to the reset input of the ocmplement flip flop described later As the counter advances through its 16 states the four binary weighted 1 2 4 and 8 outputs address the multiplexer channels and move the bits of data applied to the parallel inputs over to the multiplexer output For example the first clock pulse to the counter advances it from the zero state to the first state in which the 1 output is true and the 2 4 and 8 outputs are false As a result the second channel of U1 and U4 is ad dressed and the second bit of data appears at the multiplexer outputs As the counter advances the subsequent inputs of U1 and U4 appear at the multiplexer outputs until the count of eight is reached At this point the 8 output becomes true to inhibit U1 and enable U2 The eight inputs of U2 are sequentially addressed in the same manner as U1 and the pro gram data appears in serial format at the U2 output and is commonly connected with the 01 output During the 16 state cycle of the counter 01 and U2 are each cycled once while U4 is cycled through its eight addresses twice This is of no consequence since input data has not changed during the generation of the 16 clock pulses 383 16 clock pulses are fed to inputs of gates U13 3
54. limit levels external reference and standby status of the in ternal register None of these indicators are provided when the Blank Front Panel 05 Option is installed A POWER indicator is included with either option to indicate that the power is on 2 47 Dynamic Characteristics 2 48 power source output be changed quite rapidly with high speed programming information How ever 10Qus period must be allowed before the output has settled to its stated accuracy for a resistive load 2 49 When an external signal is used as the reference for the power source the output accuracy is dependent upon the characteristics of the external signal If a dc voltage is used the output accuracy is related to the accuracy and stability of the external voltage However if an ac signal is used the output accuracy is not only dependent upon the external signal stability but also its frequency Typical examples of accuracy versus frequency are shown in Figure 2 9 through 2 12 1V rms 10 rms OUTPUT 10v RANGE ss gt lt 8 lt Q 7 gt 5 8 a FREQUENCY Figure 2 9 ACCURACY VERSUS EXTERNAL RE REFERENCE FREQUENCY mu EXTERNAL REFERENCE 10V rms C PROG RAMMED OUTPUT 0 VOLTS 5 2 5 3 2 z
55. option Figure 609 3 Binary Program Data Standard Format 609 14 BINARY LOGIC SENSE 609 15 Data word logic sense positive true true 5V or negative true true is determined by jumper connections between pads J K L M W X and Y Standard operation uses positive true logic and it is achieved through jumpering W to Y J to L and M to K Negative true data word logic may be established by jumpering W to X J to K and M to L referto Figure 609 4 609 16 Control word logic sense may also be either positive true or negative true with positive true being the standard operating logic sense To establish positive true control word logic jumper pad N to pad R to establish negative true logic jumper pad N to pad P Refer to Figure 609 4 4 79 609 17 BINARY VOLTAGE SOURCE POLARITY 609 18 Voltage source output polarity either positive or negative is selected by a polarity bit in the 16 bit Binary data word Bit 16 in the data word is polarity selection refer to Figure 609 3 It is possible to establish polarity using the first bit of the control word by jumpering pad 16 to pad 17 and pad B to pad E However if the first control word bit is used for polarity asynchronous standby operate programming must be established by jumpering pad 20 to either pad 19 standby positive true pad 18 operate positive true Pad D must be jumpered to pad C for either logic sense Refer to Figure 609 4 60
56. pin 1 of U3 The 10kHz MV output supplied to the counter through the closed contacts of switch 11 is also applied to the input of the auto strobe generator at pin 9 of U1D When the EXT mode switch 510 is depressed and latched the AUTO mode switch is released This removes the 6 10 10kHz MV output from the input of the auto strobe gener ator and from the clock input of the binary counter The closed EXT mode switch connects the TRIGGER INPUT jack J4 to the counter and strobe generator inputs An external 50 ohm pulse generator can be used to replace the 10kHz MV pulse A 51 ohm resistor R1 provides the input termination for the external generator 6 60 MAGNITUDE PROGRAM SWITCHES 6 61 magnitude program switches consist of sixteen single pole double throw push push switches on the A2 Program Assembly S1 through S16 The arms of these switches are wired directly to pins 1 through 16 of the J1 programming connector The normally closed contacts of these switches are bussed to the 5 4 power input pin 25 of the programming connector Hence in their normally closed condition which is the non depressed state these switches apply 5Vdc to pins 1 through 16 of the program ming connector 6 62 The normally open contacts of the switches are bussed in fours to one switch each in each of four groups as S1 to S5 to 59 to S13 as S2 to S6 to 510 to S14 etc In one case these switches can be considered to be bussed in four
57. since binary program sources usually indicate polarity by means of a single bit and supply two s complemented magnitude data for negative outputs The binary type power sources require non complemented binary data plus a polarity bit Asa result negative binary magnitude data consisting of comp lemented data must be re complemented to satisfy the re quirements of the power source When the binary program source indicates negative sign gate U9 8 is enabled to pass the output of the complementing logic The complementing logic receives the serial output of U1 and U2 complements it and passes it across the guard via T1 3 86 Operation of the two s complementing logic U9 and 010 is such that the first bit of serial data multiplex address zero is present at the output of multiplexer U1 before the 16 counter and complement flip flop U10 receives the first of 16 clock pulses At this time the 16 counter is in its zero state to address channel zero of U1 and the complementing flip flop is still reset as a result of the carry pulse generated by the 16 counter at the end of the previous data transfer sequence With the comple ment flip flop reset the complement logic is not enabled and no inversion of serial data takes place This condition permits the first binary magnitude data to be transferred with out being complemented However after the first clock pulse the complement flip flop may be allowed to go set
58. turns them off This condition then disconnects the external reference from the internal Vg pplines 3 6 3 66 A5 BCD Ladder 42104 1031 3 67 A5 BCD Ladder contains a buffer amplifier for and the three lower decade segments of a ladder net work The buffer amplifier produces a Vp signal from to prevent loading of VREF by ladder switching cur rents The ladder decades are voltage dividers weighted in fifteenths for control by digital words from 1 to 15 8 4 2 1 The relative position of each decade with respect to the ladder output determines the significance of each decade s contribution to the total ladder network out put 3 68 3 69 Buffer Amplifier composed of Q1 through Q3 is a unity gain amplifier connected through CR1 to function as a voltage follower This circuit produces a Vp Signal that is applied to the ladder driver circuits Output impedance is sufficiently low from dc to 100 kHz to prevent loading by ladder switching currents BUFFER AMPLIFIER 3 70 LADDERS 3 71 three lower decade ladders consists of R1 through R18 Each decade of the ladder is formed essentially by four resistors which in combination weigh the division factor of each decade in fifteenths A simplified diagram of a typical decade ladder is shown in Figure 3 3 OUTPUT Vo v Vo IS AVAILABLE IN REE VOLT STEPS Figure 3 3 LADDER DECADE SIMPLIFIED 3 72 DRIVERS 3 73 Each ladde
59. up to eight 4200 09 units Additional 4200 09 units are connected in a series configuration as shown in Figure 609 2 609 5 Program Source Requirements 609 6 Fluke 4200 Series Programmable Voltage Sources require either BCD or Binary coded input commands the 4200 09 Option will operate with either coding format Source program data must include the following information January 1975 REV 1 4 79 4200 09 Option 09 Multi Strobe Isolated Logic 1 Output voltage magnitude 2 Output voltage range 3 Output voltage polarity 4 Current limit magnitude and range Option 5 Strobe pulse s 6 Voltage Source mainframe address 7 Operate Standby signal 8 External Internal Reference Signal Option 609 7 addition to providing program information to the voltage source the program source should be capable of receiving status information from the voltage source Through unique voltage source mainframe address the program source can determine the status of any voltage source in a multiple source system Status information supplied by the voltage source includes Current Limit condition Polled 2 Power Off condition Polled 3 Abnormal Status 4 Ready Not Ready Status 609 1 4200 09 56 PIN CARD EDGE CONNECTOR TO SUCCEEDING 4200 50 PIN AMPHENOL CONNECTOR CONNECTS TO PROGRAM SOURCE OR PRECEDING 4200 Figure 609 1 4200 09 Connectors 609 8 OPERATING INSTRUCTI
60. will return to normal but the NOT READY flag will remain for 110 to allow for output settling time Figure 2 8 and 2 9 show the timing relations of these flags If the Programm able Current Limiting 06 Option is installed the I LIMIT flag will also be activated when current limiting occurs 4270A 2 38 Programmable Current Limiting 2 39 When the Programmable Current Limiter 06 Op tion is installed two ranges of current limiting are available 0 5 amp and 50mA The CURRENT LIMIT MA range is programmed by a single binary input at pin 42 of the pro gramming connector A Logic 0 applied to this pin programs the 50 range and a Logic 1 programs the 0 5 amp range 240 The magniutde of the output current is program med by applying either BCD or binary coding to pins 43 through 46 of the programming connector Current mag nitude programming is in increments of 10 of the pro grammed range If all current magnitude inputs are pro grammed to Logic 0 the current limit is still 10 of the programmed range The maximum current limit that can be programmed is 110 of the programmed range When current limiting occurs the I LIMIT flag changes from Logic 0 to Logic 1 as described in paragraph 2 37 NOTE A sink capability greater than the programmed current limit value cannot be realized 2 41 External Reference 242 When the External Reference 03 Option is in stalled a single p
61. 00V CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP TA 10 UF 20 15V MICA 220 PF 5 500V 470 PF 5 500V MICA MICA MICA MICA MICA FILM 1000 PF 5 500V TO PF 54 500V 70 PF 5 500V 270 PF 54 5007 0 0033 PF 2 150V CER 0 01 UF 20 100V MICA 330 PF 1 5007 MICA 70 PF 5 500V MYLAR 0 1 CER CER CER CER CER CER 9 9 9 0 0 0 0 0 025 025 025 025 025 025 025 025 ELECT 200 ELECT 200 MICA 56 PF 5 500V 5 500V 5 5007 MICA 56 PF MICA 56 PF MICA 56 PF MICA 220 PF MICA 56 PF CER CER CER CER CER CER CER CER CER CER CER UF UF UF 10 50V 20 100V 20 1007 20 1007 20 1001 20 1007 20 1007 20 1007 20 1007 50 10V 50 10V 5 500V 5 5007 5 500 CER 0 01 UF 20 100V CER 0027 PF 0 025 UF 0033 UF 0 0 0 ooooo 0 025 025 025 025 025 025 025 025 025 CER 0 025 UF UF UF UF UF GMV 600V 20 1007 GMV 600V 20 1007 20
62. 01 208 881 6220 AZ Tempe John Fluke Mfg Co Inc 2211 S 48th Street Suite B Tempe AZ 85282 602 438 8314 Tucson 602 790 9881 CA Irvine P O Box 19676 Irvine CA 92713 16969 Von Karman Suite 100 Irvine CA 92714 714 863 9031 Los Angeles John Fluke Mfg Co inc 20902 South Bonita St Carson CA 90746 213 538 3900 San Diego John Fluke Mfg Inc 4540 Kearny Villa Rd Suite 115 San Diego CA 92123 619 292 7656 Santa Clara John Mfg Inc 2300 Walsh Ave Bldg K Santa Clara CA 95051 408 727 0513 CO Denver John Fluke Mfg Co inc 1980 South Quebec St 4 Denver CO 80231 303 750 1222 CT Hartford John Fluke Mfg Co inc Glen Lochen East 41 C New London Turnpike Glastonbury CT 06033 203 659 3541 FL Orlando John Fluke Mfg Co Inc 940 N Fern Creek Ave Orlando FL 32803 305 896 4881 GA Atlanta John Fluke Mfg Co Inc 2700 Delk Rd Suite 250 Marietta GA 30067 404 953 4747 1 lowa City 319 354 2811 IL Chicago John Fluke Mfg Co Inc 3740 Industrial Ave Rolling Meadows IL 60008 312 398 0850 IN Indianapolis John Fluke Mfg Co Inc 8777 Purdue Road Suite 101 Indianapolis IN 46268 317 875 7870 KS Kansas City 913 381 9800 LA New Orleans 504 455 0814 MA Burlington John Fiuke Mfg Co Inc 25 B Street Burlington MA 01803 617 273 4674 MD Baitimore 301 792 7060 Rockville John Fiuke Mfg
63. 021 IC TTL HEX INVERTER 293076 01295 SNTHHO N 1 U24 IC TTL 8 BIT SHIFT REGISTER 212138 12040 DM8570 3 25 IC TTL 8 BIT SHIFT REGISTER 272138 12040 DM8570 REF U26 IC TTL 8 BIT SHIFT REGISTER 272138 12040 DM8570 REF 027 TTL DUAL FOUR BIT LATCH 293191 04713 MC8303P 1 928 IC TTL MONO MULTIVIBRATOR 293050 01295 SN74121N 2 929 IC TTL J K MSTR SLAVE F F 296491 01295 SN7472N 1 Ic TTL MONO MULTIVIBRATOR 293050 01295 SNT74121N REF For usage on Models 4210 and 4216 only See Table 609 11A for timing components used on the Models 4250 4265 4270 and 4275 for R19 R40 C11 and C20 Ref Des 609 32 4 79 4200 09 e 8 5 oe 68 x G9 pj 54 Dens EE 9 9 2 lt un Gs SS lt gt ues gt 9 m c b lt gt 5 39 759 SEV daa Poes E B a o ssi_ gt Um 2 m n 4 c j S s s tipi xd 4 d ond 5 vo 9 8 Figure 609 12 Multi Strobe Isolated Logic PCB Assembly 609 33 4 79 4200 09 Table 609 11A Timing Components 42504 4265A 4270A 4275A FLUKE MFG REF MFG PART NO TOT REC USE DES DESCRIPTION STOCK SPLY OR TYPE NO CODE 11 CAP POLY STYRN 0 01 UF 24 150V 168385 02799 PE103G 1
64. 09 85 Programming the 4200 Voltage Source to standby zero output but no change in programmed magnitude and range may be performed in a synchronous or asynchronous manner depending on jumper configuration With synchronous standby operation the standby bit supplied by the program source becomes part of the control word and is serially shifted across the guard for application to the standby input of the 4200 Voltage Source This mode is referred to as synchronous standby because commanding the 4200 Voltage Source to standby or operate is always synchronous with a strobe signal from the program source 609 86 With the 4200 09 jumper configured for asynchronous standby operation the voltage source can be commanded to either the standby or operate mode independent of data transfer The standby signal a dc level is gated to the 10 MHz clock to initiate clock pulse generation If a data transfer sequence is not in progress the data transfer flip flop will be in its reset condition Clock pulses and the data transfer flip flop Q output false must be coincident for standby pulses to be gated across guard shield transformer T2 With the data transfer flip flop in the reset state the Q output prohibits clock pulses from reaching the 16 counter and the shift registers Clock pulses from the secondary winding of transformer T2 are input for a half wave rectifier The rectifier produces a dc output to the 4200 Voltage Source standby operate
65. 0A CURRENT LIMIT PCB ASSEMBLY 06 Option Cont MFG DESCRIPTION PART NO Xstr Si NPN 218396 2N3904 Xstr Si PNP 195974 2N3906 Xstr J FET N channel 261578 U2366E Xstr semicon Si PNP dual 242016 SE 4901 Si PNP 276899 2N5415 Xstr Si PNP 284448 2N5416 Xstr Si NPN 218511 60994 Si NPN 220087 00 17 Xstr Si NPN 335067 2N3439 Res comp 39k 525 1W 236729 GB3935 Res comp 8 2k 5 2W 330555 HB8225 Res met flm 649 1 1 8W 309955 MFF1 8649F Res met flm 750 1 1 8W 312801 MFF1 8751F Res var cermet 500 10 1W 291120 3608 501A Res met flm 15 1 1 8W 296434 8151 Res comp 2 7k 5 2W 330548 5 30 4270A CURRENT LIMIT PCB ASSEMBLY 06 Option Cont DESCRIPTION Res comp 47k 5 Res comp 10k 5 W Res comp 24k 5 Res comp 12k 5 Res comp 27k 5 W Res met flm 6 19k 1 1 8W Res met flm 10k 1 1 8W Res comp 5 1M 5 Res comp 5 1k 5 Res comp 10M 5 W Res var cermet 20k 10 4W Res met flm 24 9k 1 1 8W Res met flm 2 74k 1 1 8W Res comp 22k 5 1W 148163 148106 193425 159731 148148 283911 168260 294467 193342 194944 291609 291369 293761 330530 4735 1035 2435 CB1235 CB2725 MFF1 86R19F MFF1 8103F CB5155 CB5125 CB1065 3605 203 MFF1 824R9F MFF1 82R74F GB 2235 5 31
66. 116 Voltage transients that would occur during a cur rent limit and abrupt load removal are limited by the Clamp Circuitry Two circuits titled Clamp and Clamp limit the bipolar transients The Clamp consists of Q1 through 04 Transistors Q5 through Q8 form the Clamp Since operation of each circuit is the same except for polarity only the Clamp is described 3 117 The Clamp monitors the voltage between the emitter of Q11 and that on the anode of CR33 Normally Q1 and Q2 are cut off and Q3 is conducting however when a current limit occurs the anode voltage of CR33 decreases through action of either the built in current limiter over load protection or the A8 Programmable Current Limiter optional and subsequently turns off Q3 The voltage at the emitter of Q11 will increase toward Wry during current limiting and this turns on 02 Conduction of Q2 tums on Q1 and produces a clamp signal at terminal 6 of P1 This clamp signal then limits the summing junction voltage in the A3 Preamplifier and causes the emitter voltage of Q11 to be clamped to a voltage slightly above that of the base drive to the Output Stage Transistor Q4 functions as a current source for Q2 and Q3 Frequency and phase char acteristics of the Clamp circuitry is determined by C1 C2 C26 and R65 3 118 CURRENT SOURCES 3 119 Constant current for the Output Stage is provided by the Positive and Negative Constant Current Sources Transistor Q30 for
67. 18 218693 330506 330944 163717 144717 4270A MFG PART NO MFF1 84R12F CB1025 1015 2445 CB3345 CB6225 CB1035 8103 MFF1 86R04F MFF1 815R8F CB7525 EB1345 1815 GB3335 CB6805 1065 1 23 7 MFF1 8127F 1165 5105 42704 DESCRIPTION Res var cermet 100 10 1W Not used Res comp 20k 5 1W Not used Res met flm 54 8k 1 1 8W Res comp 5 W Heat Sink Conn assy 285130 330951 271353 182204 302141 310771 MFG PART NO OR TYPE 360S 101A GB2035 MFF1 854R9F CB1055 302141 310771 42704 Figure 5 10 POWER AMPLIFIER 5 39 DESCRIPTION HIGH VOLTAGE POWER SUPPLY ASSY 333005 High Voltage Power Supply PCB 332916 332916 Figure 5 11 Xfmr power 333799 333799 Cord Set 248708 High Voltage Power Supply PCB 332916 cer 0 01 uF 20 500V 105668 Cap elect 1200 uF 75 10 250V 329953 Not used Cap p stc 0 47 uF 10 2507 184366 Diode Si 1 amp 600 piv 112383 1N4822 Diode zener 328820 1N3040B Xstr Si NPN located on Heatsink 223602 2N3773 Xstr Si NPN 218511 65120 Xstr Si PNP 276899 2N5415 Res comp 4 7k 5 W 108886 EB4725 Res comp 33k 10 2W 158964 HB3331 Res comp 8 2k 5
68. 20 CAP MICA 680 PF 1 500V 226159 72136 DM19F681F 1 R19 RES MTL FILM 32 4K 1 1 8W 182956 91637 CMF553242F R40 RES MTL FILM 31 6K 1 1 8W 261610 91637 CMF553162F 1 Table 609 12 4200 09 isolated Logic Piggyback PCB Assembly FLUKE MFG REF MFG PART NO TOT REC USE DES DESCRIPTION Ma CODE OR TYPE OTY OTYICDE ISOLATED LOGIC PIGGY BACK PCB ASSY 341222 89536 341222 FIGURE 6 13 Ci CAP MICA 330PF 5 500V 148445 72136 DM15F331J 2 c2 CAP CER 0 22PF 5 50V 309849 32897 8131 050 651 224 2 CAP MICA 5 5007 148445 72136 DM15F331J REF ca CAP CER 0 22PF 5 50V 309849 32897 8131 050 651 224 REF CRI DIODE SI 150 MA 203323 04713 1N 4448 3 1 DIODE SI 150 203323 08713 1844486 REF CR3 DIODE SI 150 MA 203323 04713 INKHAB REF 91 XSTR NPN SI 159835 07910 CS23030 5 1 Q2 XSTR NPN SI 159835 07910 CS23030 REF Q3 XSTR NPN SI 159835 07910 523030 REF QU XSTR NPN SI 159835 07910 0323030 REF Q5 XSTR NPN SI 159835 07910 CS23030 REF R1 RES COMP 470 5 1 4W 147983 01121 CB4715 2 R2 RES COMP 2K 5 1 4W 202879 01121 CB2025 1 R3 RES COMP 10 5 1 4W 148106 01121 CB1035 4 RY RES COMP 10 5 1 4W 148106 01121 CB1035 REF R5 RES COMP 10K 5 1 4W 148106 01121 1035 REF R6 RES COMP 10K 5 1 4W 148106 01121 CB1035 REF RT RES COMP 470 5 1 4W 147983 01121 4715 REF R8 RES COMP 20 5 1 4W 221614 01121 CB2035 1 RQ RES COMP 4 7 5 1 4W 1480
69. 200 DESCRIPTION MANUAL CONTROL UNIT Figure 6 8 CONNECTOR ASSEMBLY PCB Figure 6 9 303701 303727 PROGRAM SWITCH ASSEMBLY PCB Figure 6 10 FUNCTION ASSEMBLY SWITCH PCB Figure 6 11 PANEL TOP SCREENED Figure 6 8 303719 303743 152033 Connector BNC level cont input Diode Light Emitting 309617 303354 309625 Cable Assembly Interface Clip Snap in diode black Panel Switch Panel Switch interior 303768 130138 Foot Rubber Button black 303750 Channel bottom Switch Assemblies see A2 Figure 6 9 and A3 Figure 6 10 Figure 6 8 MANUAL CONTROL UNIT 44200 MCU TOTIREC USE REF DESIG DESCRIPTION STOCK NO CODE 6 18 CONNECTOR ASSEMBLY PCB Figure 6 9 Cap fxd flm 0047 uf 2 150v Cap plstc 047 uf 10 200v Cap mica 330 pf 5 500v Cap mica 100 pf 5 500v Cap fxd elect 640 uf 50 10 6 4v Cap plstc 47 uf 410 250v Cap mica 640 pf 5 500v Diode sil 150 ma Connector female 50 contact Connector female 36 contact Connector female 20 contact Xstr Si NPN Xstr Si unijunction Res comp 2 4K 5 1 4w Res met fim 15 4K 1 1 8w Not used Res comp 22K 5 1 4w Res comp 10K 5 1 4w Res comp 39K 5 1 4w Res comp 152 5 1 4w Res comp 1K Res comp 3K 5 1 4w Res met flm 13 7K 1 1 8w Res comp 5100
70. 28 and associ ated components 3 99 LADDER SWITCHES AND LADDER 3 100 The Ladder Switches and Ladder respectively consist of FET switches 04 06 012 and 09 and resistors R52 R55 R54 and R15 The ladder resistors are weighted in a ratio of 1 2 4 and 4 The ladder operation is best explained in conjunction with the Programmable Reference See paragraph 3 121 3 101 PROGRAMMABLE REFERENCE AMPLIFIER 3 102 Programmable Reference Amplifier U4 is mono lithic IC operational amplifier Assuming current range Switch Q26 is on then U4 output voltage varies between 0 01 volt and 0 11 volt as the ladder resistors are Switched into the circuit by the FET switches That is with only Q4 on the output voltage is 0 01 volt With Q4 Q6 012 and 09 on the output voltage is 0 11 volt The range is set by R31 in parallel with R30 and is the 10 ma to 110 ma current range With Q26 turned off the range is determined by R30 alone This is the 100 ma to 1 1 ampere range Current Limit x 10 command in which the ladder resistors produce an output from U4 of 0 1 volt to 1 0 volt Amplifier U3 also a monolithic integrated circuit together with resistors R24 and R25 forms a unity gain inverting amplifier The output of U3 is the same magnitude as that of U4 but of opposite polarity 3 103 POSITIVE AND NEGATIVE I LIMIT COMPARA TORS 3 104 Since the comparators function in the same manner except for polarities only the posit
71. 3 Fairchild Semiconductor Div of Fairchild Camera amp instrument Corp Mountain View California 07344 Bircher Co Inc Rochester New York 07597 Burndy Corp Tape Cabie Div Rochester New York 07792 Lerma Engineering Corp Northampton Massachusetts 07910 Teledyne Semiconductor Formerly Continental Device Hawthorne California 07933 Use 49956 Raytheon Co Semiconductor Div HQ Mountain View California 08225 Industro Transistor Corp Long Island City New York 7 3 08261 Spectra Strip Corp Garden Grove California 08530 Reliance Mica Corp Brooklyn New York 08806 General Electric Co Miniature Lamp Products Dept Cleveland Ohio 08863 Nylomatic Corp Norrisville Pennsylvania 08988 Use 53085 Skottie Electronics Inc Archbald Pennsylvania 09214 G E Co Semi Conductor Products Dept Power Semi Conductor Products OPN Sec Auburn New York 09353 C and K Components Watertown Massachusetts 09423 Scientific Components Inc Santa Barbara California 09922 Burndy Corp Norwalk Connecticut 09969 Dale Electronics Inc Yankton S Dakota 10059 Barker Engineering Corp Formerly Amerace Amerace ESNA Corp Kenilworth New Jersey 11236 CTS of Berne Berne Indiana 11237 CTS Keene Inc Paso Robles California 11358 CBS Electronic Div Columbia Broadcasting System Newburyport Minnesota 11403 Best Products Co Chicago Illinois 1150
72. 3 Keystone Columbia Inc Warren Michigan 11532 Teledyne Relays Hawthorne California 11711 Generai Instrument Corp Rectifier Division Hicksville New York 7 4 Federal Supply Codes for Manufacturers cont 11726 Qualidyne Corp Santa Ciara California 12014 Chicago Rivet amp Machine Co Bellwood Illinois 12040 National Semiconductor Corp Danburry Connecticut 12060 Diodes Inc Chatsworth California 12136 Philadelphia Handle Co Camden New Jersey 12300 Potter Brumtieid Div AMF Canada LTD Gueiph Ontario Canada 12323 Presin Co Inc Shelton Connecticut 12327 Freeway Corp formerly Freeway Washer amp Stamping Co Cleveland Ohio 12443 The Budd Co Polychem Products Plastic Products Div Bridgeport Pennsylvania 12615 U S Terminals inc Cincinnati Ohio 12617 Hamlin Inc Lake Milis Wisconsin 12697 Clarostat Mfg Co Dover New Hampshire 12749 James Electronics Chicago Illinois 12856 Micrometals Sierra Madre California 12954 Dickson Electronics Corp Scottsdale Arizona 12969 Unitrode Corp Watertown Massachusetts 13103 Thermalloy Co Inc Dallas Texas 13327 Solitron Devices Inc Tappan New York 13511 Amphenol Cadre Div Bunker Ramo Corp Los Gatos California 13606 Use 56289 Sprague Electric Co Transistor Div Concord New Hampshire 13839 Replaced by 23732 14099 Semtech Corp Newbury Park California 14140 Edi
73. 32908 Figure 5 2 Connector femal 50 contact 284604 Figure 5 2 MOTHER PCB ASSEMBLY DESCRIPTION POWER SUPPLY PCB ASSEMBLY Figure 5 3 Cap cer 0 05 uf 8 20 25V Cap mica 33 pf 5 500 Cap mica 100 pft 5 500V Not used cer 500 pf 10 1 kV Cap elect 250 uf 50 10 64V Not Used Cap elect 8000 uf 100 10 15 Not Used Cap Ta 1 0 uf 20 35 Cap cer 2000 pf 1 Cap cer 0 1 uf 480 2095 500V Cap plstc 0 1 uf 10 400V Cap cer 1 uf xgmv Diode silicon 1 amp 600 piv Diode silicon 150 ma Diode bridge 2 amp Not Used 332940 148924 160317 148494 105692 185850 309245 161919 105569 105684 289744 106567 112383 203323 296509 4270A MFG PART TOTIREC USE OTY OTY CDE 332940 855 Y50 503Z DM15E330J DMISF101J 2DDH60NSOIK C437 ARH250 61C15AS83 196D105X0035 DA140 139CB 41C92 C280CF A100K UK105 1N4822 DHD1105 2 1 5 7 4270A DESCRIPTION Not used Diode zener 4 3V 180455 1N749A Diode Rectifier 329672 1N5059 Fuse slow blow 2 amp 250V For 115V 109181 operation Connector male 3 contact power 284166 Connector female 36 contact 236885 Relay 4PDT 5V Coil 272716 Xstr silicon NPN 218396 Xstr J FET N channel 261578 U2366E Xstr silicon PNP 195974 2N3906 Xstr silicon NPN 150359 2N3053 Xstr silicon PNP 269076 2N4037 Xstr silicon NPN 288381 40
74. 372 J FET N channel 271924 07910 CFE13041 Xstr J FET N channel 288324 SF50070 Res comp 1 5 148023 CB1025 Res met flm 2 87k 1 1 8W 185629 91637 MFF1 82R87F Res met fim 17 4k 1 1 8W 236802 191637 1 817 4 Res met flm 5 76k 175 1 8W 260349 191637 MFF1 85R76F DESCRIPTION Res met flm 13 7k 1 1 8W Res comp 22k 5 Res var cermet 202 20 4W Not used Res met flm 40 29 1 1 8W Not used Res ww 20 02k 40 1 Matched Set Res ww 20k 0 1 Res var cermet 502 10 W Res met flm 10k 1 1 8W Res met flm 30 1k 1 1 8W Res comp 10k 5 4W Res comp 39k 5 Res comp 2k 5 Res comp 2 7k 5 Res comp 4 7 5 Not Used Res ww 10k 0 1 Res ww 4 02k 0 1 Res ww 3 74k 0 1 W Res comp 470 5 Res met flm 3 74k 1 1 8W Not Used Res comp 22 5 4W 236752 148130 285114 245373 291674 285122 168260 168286 148106 148064 202879 170720 193359 240945 240937 246173 147983 272096 169847 4270A MFG PART NO MFF1 813R7F CB2235 360S 200B MFF1 840 250 291674 360S 500A MFF1 8102F MFF1 830RIF CB1035 CB3925 CB2025 CB2725 4765 240945 240937 246173 4715 MFF1 83R74F EB2205 4270A 05 DESCRIPTION Res comp 10 5 4W 147868 CB1005 Res factory selected value ma
75. 4270A BCD Programmable Power Source Instruction Manual P N 338418 FLLJ KE August 1975 Rev 1 5 79 1980 John Fluke Mfg Co inc ail rights reserved Litho in U S A WARRANTY Notwithstanding any provision of any agreement the following warranty is exclusive The JOHN FLUKE MFG CO INC warrants each instrument it manufactures to be free from defects in material and workmanship under normal use and service for the period of 1 year from date of purchase This warranty extends only to the original purchaser This warranty shail not apply to fuses disposable batteries rechargeable type batteries are warranted for 90 days or any product or parts which have been subject to misuse neglect accident or abnormal conditions of operations In the event of failure of a product covered by this warranty John Fluke Mfg Co Inc will repair and calibrate an instrument returned to an authorized Service Facility within 1 year of the original purchase provided the warrantor s examination discloses to its satisfaction that the product was defective The warrantor may at its option replace the product in lieu of repair With regard to any instrument returned within year of the original purchase said repairs or replacement will be made without charge If the failure has been caused by misuse neglect accident or abnormal conditions of operations repairs will be billed at a nominal cost In such case an estimate will be su
76. 5 203851 148007 111815 22164 293050 276527 4270 MFG PART NO USE OTY QTY CDE MFF1 22RIF CB1015 MFF1 2103F MFF1 24R87H MFF1 22R49F CB9115 CB6815 TYPE R1250 CB2035 SN74121N TSA 2900 14W 5 15 42704 PRE AMPLIFIER PCB ASSEMBLY 4 Figure 5 5 16 4270A MFG DESCRIPTION PART NO EXTERNAL REFERENCE PCB ASSY 292581 EXTERNAL REFERENCE Figure 5 5 03 Option Cap elect 20 uf 75 10 50V 106229 Cap mica 390 pf 576 500V 148437 DMISF391J Cap mica 82 pf 5 500V 148502 DMISF820J Cap mica 270 pf 5 500V 148452 DMISF271J Cap cer 0 05 uf 20 100V 149161 55C23A1 Cap mica 5 pf 10 500V 148577 DM15C050K Cap mica 22 pf 5 500 148551 DMI1SE220J Diode silicon 150 ma 203323 DHD1105 Tstr J FET dual N channel selected 225987 225987 Tstr silicon NPN 218396 2N3904 Tstr silicon PNP dual 242016 SE4901 Tstr silicon NPN 168716 519254 Tstr J FET N channel 261578 U1897E Tstr silicon PNP 195974 2N3906 Tstr silicon NPN 150359 2N3053 Res ww 100 025k Res ww 99 955k Matched Set 291682 291682 Res comp 10 5 147868 CB1005 Res ww 6 8k 0 03 W 254359 254359 Res met flm 107k 1 W 296384 MFF1 21073F Res var cermet 100k 10 288308 3605 104 Res met flm 1 27M 1 229252 MFF1 21275 Res met flm 750k 1 155192 MFF1 2754F Res met flm 374k 1 W 262105 MFF1 23743F Res met flm 187k 1
77. 54 214 108K 60 4 3084 A R1 4 D 200 pa R28 RSE R10 R12 24 987 5138 190 025 200 075 424 987K 750K 100 03K 2200 08 49 975 DRIVE pRiVER pRIVER DRIVE DRIVE DRIVER is D24 D22 D21 D38 iR 032 D31 s R P N w v u r B8 B4 B2 81 cs c2 V DECADE DECADE DRIVER 16 PLACES LOGIC BIT INPUT OV TRUE 609 1 INTRODUCTION 609 2 Multi Strobe Isolated Logic Option 09 for the Fluke 4200 Series Programmable Voltage Sources provides voltage source remote control capability A computer a system controller or the Fluke Automatic Test Equipment System can control Programmable Voltage Sources equipped with the Multi Strobe Isolated Logic Option 609 3 The 4200 09 Option comprises two printed circuit boards mounted as one assembly within a 4200 Series Voltage Source Physical access to the 4200 09 is through an opening in the 4200 chassis rear panel electrical access is through a 50 pin connector 609 4 Program source to 4200 09 connection is through a cable from the selected program source to the 4200 09 50 pin connector Refer to Figure 609 1 The interconnecting cable connector is an Amphenol Blue Ribbon 57 30500 Fluke Stock Number 266056 The program source cable connector and cable wiring configuration is determined by the program source in use An additional 56 pin card edge connector on the 4200 09 rear panel provides single program source control of
78. 7 TLX 952 24494 Peru importaciones y Representaciones Electronicas S A Avda Franklin D Roosevelt 105 Lima 1 Peru Tei 14 28 8650 TLX 394 25663 Philippines Republic of e Spark Radio amp Electronics Inc 482 Shaw Boulevard Mandaluyong Metro Manila Republic of Philippines Tel 2 775192 TLX 722 or 732 27901 Poland Amtest Associates Ltd Clarence House 31 Clarence Street Staines Middlesex TW18 4SY England Tel 784 63555 TLX 851 928855 Portugal Decada Espectral Equipamentos de Electronica Av Bombeiros Voluntarios Lote 1028 Miraflores Alges 1495 Lisbon Portugal Tel 1 2103420 TLX 832 15615 Qatar a Technology Organization P O Box 5549 Doha Qatar Tel 321431 TLX 957 4581 Rumania Amtest Associates Ltd Clarence House 31 Clarence Street Staines Middlesex TW18 4SY Engiand Tel 784 63565 TLX 851 928855 Saud Arabla Electronic Equipment Marketing Co P O Box 3750 Riyadh Saudi Arabia Tel 1 477 1650 TLX 928 201120 Singapore Republic of Rank O Connor s Singapore PTE Ltd O Connor House 98 Pasir Panjang Road Singapore 0511 Republic of Singapore Tel 637944 TLX 786 RS21023 South Africa Fluke S A Pty Ltd Wynberg Park 777 Andries Street Wynberg South Africa Tel 11 786 3170 TLX 960 424328 Spain ESSA Equipos y Sistemas S A C Apolonio Morales 13 Madrid 16 Spain Tel
79. 7 BCD Display provides light emitting diode LED indica tors which display the internal command data and power on state Internal commands of OV true are inverted by 01 through US and turn on the associated LED of Q1 through Q27 Power on is indicated through direct application of Vi to Q1 3 18 A2 Power Supply and A10 Connector Board 4270A 1061 and 42704 1012 3 19 All operating voltages as well as the internal refer ence voltage upon which the power source accuracy and stability relies are produced in the A2 and A10 assemblies Designations and nominal magnitudes of each voltage is given in Table 3 1 Table 3 1 OPERATING VOLTAGES DESIGNATION VOLTAGE VDC 136 23 4 25 1V Approximate at 115V line voltage no load 3 20 INPUT POWER 3 21 Ac line power at J1 is applied to the primary of T1 through POWER switch 52 and the 115 230 switch S1 The primary of T1 consists of two windings which allow opera tion from either a 115 or 230V ac line S1 provides a parallel primary winding connection for 115V ac line operation A series connection is provided for 230V ac line operation AC power for the blower M1 is provided from the primary windings of T1 The four secondary windings of T1 supply ac voltages to associated power supplies 322 Vi SUPPLY 3 23 Vj Supply composed of CR19 and 021 through Q24 produces a regulated 5V dc for use by the 4270A A6 Logic and external program
80. 72 01121 CBH725 1 91 DTL HEX INVERTER 268367 01295 5 158368 1 1 02 Ic TTL INVERTER 292979 01295 SN74O4N 2 1 93 IC TTL QUAD 2 NOR GATE 288845 01295 SN74O2N 1 1 04 IC TTL QUAD 2 IN NAND GATE 292953 01295 SNTHOON 1 1 05 Ic TTL DUAL J K F F 293043 01295 SN74107N 1 1 06 Ic TTL HEX INVERTER 292979 01295 SN74O4N REF 609 34 4 79 N es SHIFT REGISTER BINARY BCD SEE 1025 45 5 D f 4 2 1 8 E 6 t 34 L 8 A Poe 22 v 2 f 4 MA s Les d 224 2 3 saz L 4 6 AR CAEN 7 LATS EP et 4 EA TN STANDBY 4 M 12 2546 10 868 ONG 1025 amp ku lt SUMPET 10 MAGNITUDE RANGE x PIR 271 SEE DRG OZS POWER ON PRESET 06 40 5 CONTROL WORD STROBE 18 6 4 Uem 0 DATAWORD STROBE Ur 1025 EXTERNAL REFERENCE 3i UMT RANGE 2 lt M STROBE 2 POLARITY 3 Luar oF MAGNITUDE 2 gt 3 1 n 6 4 7 4564 47 6 48 4 6 4 9 MAINFRAME lt ADDRESS 1 2 296 12 4 44 6 FIRE 6 18 DATA WORD 4 mu 5 k
81. 7308 ireland Euro instruments amp Electronics Ltd Euro House Swords Road Santry Dublin 8 ireland Tel 1 425666 TLX 861 31821 John Fluke Co inc PO Box C9090 Everett WA 98206 206 356 5400 Litho in U S A 10 84 Israel R D T Electronics Engineering Ltd Box 43137 Tel Aviv 61430 Israel Tel 8 483211 TLX 922 32143 italy w Sistre S p A Via Pelizza da Volpedo 59 20092 Cinisello Balsamo Miian Italy Tel 2 6181893 TLX 843 334643 Sistrel S p A Via Giuseppe Armellini No 39 00143 Rome Italy Tel 6 591 5551 TLX 843 680356 Sistrel S p A Via Cintia Parco 5 Paolo 35 80126 Naples Italy Tel B1 7679700 Japan e John Fluke Co Inc Japan Branch Sumitomo Higashi Shinbashi Bldg 1 1 11 Hamamatsucho Minato ku Tokyo 105 Japan Tel 3 434 0181 TLX 781 2424331 John Fluke Mfg Co Inc Japan Branch SF Katsushige Building 2 45 Kohraibashi Higashi ku Osaka 541 Japan Tel 6 229 0871 Korea Republic of Eiectro Science Korea Co 201 Hyunjin Building 951 19 Bangbae Dong Gangnam ku Seoul Republic of Korea Tel 2 583 7703 TLX 787 25381 Kuwait Bahar International Group 26672 Safat Kuwait Arabian Guif Tel 848601 TLX 959 44822 Lebanon and Jordan Mabek Electronic Division P O Box 11 3823 Beirut Lebanon Tei 812523 TLX 923 22889 Malaysia e Mecomb Malaysia SND
82. 76 Fluke Deutschiand GmbH Vertriebsburo Hamburg Habichthorst 42 D 2000 Hamburg 61 West Germany Tei 40 5519031 TLX 841 02174556 Greece s Hellenic Scientific Representations Ltd 11 Vrassida Street Athens 612 Greece Tel 1 7211140 TLX 863 219330 Hong Kong Schmidt amp Co H K Ltd 18th Floor Great Eagle Centre 28 Harbour Road Wanchai Hong Kong Tel 5 8330 222 TLX 780 74766 or 780 76762 Hungary Amtest Assoc ates Ltd Clarence House 31 Clarence Street Staines Middlesex TW18 45 England Tel 784 63555 TLX 851 928855 India Hinditron Services Pvt Ltd 69 A L Jagmohandas Marg Bombay 400 006 India Tel 8121316 8125344 TLX 953 112326 Hinditron Services Pvt Lid 8th Main Road 33 44A Raj Mahai Vilas Extension Bangalore 560 080 india Tel 33139 TLX 953 0845741 Hinditron Services Pvt Ltd Shantiniketan Office No 6 6th Floor 8 Camac Street Caicutta 700 017 india Tet 434032 447541 Hinditron Services Pvt Ltd 204 5 6 Hemkunt Tower 98 Nehru Place New Deihi 110019 India Tel 640380 TLX 953 314890 Hinditron Services Pvt Ltd Srinath Complex Sth Floor 1 1 58 1 to 1 1 58 11 Serojini Devi Road Secunderabad 500 003 India Tei 821117 TLX 953 0155575 indonesia Dwi Tunggal Jaya Sakti P O Box 4435 Jalan Panglima Polim Raya 29 Kebayoran Baru Jakarta Selatan indonesia Tel 21 716374 TLX 796 4
83. 8050 TLX 0522472 4270A Section 8 schematic Diagrams TITLE FIGURE NO Interconnect Diagram 6 4270 1000 Al Motherboard and BCD Binary Display 0 42704 1011 2 Power Supply 4 42704 1061 AS Preamplifier a ca s vol de p poe de he A051 4 Option 03 External Reference 2 s t 42104 1041 AS BED Ladder 22 22 2224 a vox xov 42104 1031 Isolated Control Logic 2 sheets 42754 19021 8 Option 06 Programmable Current Limiter 2 42704 1081 A9PowerAmplfier 4 5 2 4 oos o 4270A 1071 AIO Power Supply and Connector Board 42704 1012 8 1 8 2 PANEL IA TRANSFORMER THERMOSTATIC SWITCH HIGH VOLTAGE POWER SUPPLY HEAT SINK PCB AMAL rT CURRENT T AZ I LIMITER POWER Kop i POWER SUPPLY 1 OPTION I AMPLIFIER AiOAIPI CHASSIS VAPPI XA2PI 1 MOTH gt DISPLAY OR BINAR AT NOTES 4 MODEL 2 CONFIGURATION 2 4 MODEL 4277A CONFIGURATION 3 mam INDICATES FIELD FACTORY INSTALLABLE OPTION 4 SOME REFERENCE DESIGNATORS ARE ABBREVIATED LE AS SER SECTIO
84. 9 11 Multi Strobe Isolated Logic PCB Assembly cont REF MFG PART NO TOT RECjUSE PLY DES DESCRIPTION STOCK SPL OR TYPE CDE 13 TRANSFORMER 299594 89536 299594 REF T TRANSFORMER 299594 89536 299594 REF 15 TRANSFORMER 299594 89536 299594 REF T6 TRANSFORMER 299594 89536 299594 REF U1 IC TTL HEX INVERTER 292979 01295 SNT4O4N 3 92 TIL 4 BIT RIGHT LEFT SHIFT REG 342691 01295 SN7495AN 3 03 TTL 4 BIT RIGHT LEFT SHIFT REG 342691 01295 SN7495AN REF u4 Ic TTL 4 BIT RIGHT LEFT SHIFT REG 342691 01295 SN7495AN REF U5 IC TIL MSI 8 BIT SHIFT REGISTER 293118 01295 SN74165N 2 96 TTL MSI SYN 4 UP DWN CNTRS 293183 01295 SN74193N 1 UT Ic TTL HEX INVERTER 292979 01295 SN74O4N REF 08 TTL MSI 8 BIT SHIFT REGISTER 293118 01295 SN74165N REF 09 IC TIL 3 IN POS NAND GATES 292995 01295 SN7410N 2 010 1C TTL MSI RETRIG MONO MULTIVBRTR 293134 04713 MC8601P 2 911 TTL QUAD 2 IN NAND GATE 292953 01295 SNT4OON 4 012 IC TTL QUAD 2 IN NAND GATE 292953 01295 SNT3OON REF U13 Ic TTL QUAD 2 IN NAND GATE 292953 01295 SN74OON REF 014 TTL DUAL HI SPEED AND OR INVERT 293084 01295 SN74H51N 1 U15 IC TTL J K EDGE TRIG F F 293092 01295 SN74H102N 1 U16 IC TTL HEX INVERTER 292979 01295 SN74O4N REF 018 IC TTL MSI RETRIG MONO MULTIVBRTR 293134 04713 8601 REF 019 Ic TTL DUAL RETRIG MONO MULTIVBRTR 310235 01295 SN74123N 1 020 IC TTL QUAD 2 NAND GATE 292953 01295 SN7HOON REF
85. 9 7 4200 09 609 8 BINARY DATA WORD POSITIVE T RUE BCD DATAWORD POSITIVE TRUE BINARY DATA WORD NEGATIVE TRUE BCD DATAWORD NEGATIVE TRUE i K wh pe ALES Y M L 16 BIT DATA WORD 8 BIT CONTROL WORD CONTROL WORD POSITIVE TRUE 18 BIT DATA WORD 6 BIT CONTROL WORD Figure 609 4 4200 09 Jumper Connections CONTROL WORD NEGATIVE TRUE P N NU Pale 4 79 4200 09 4 BCD BINARY DUAL STROBE BINARY SINGLE STROBE STROBE CONTROL POSITIVE TRUE TO LOAD CONTROL WORD k 12 3 13 11 3 13 11 EA o o o o x v T _ r V n L BINARY SINGLE STROBE CONTROL WORD STROBE BIT STROBE CONTROL POSITIVE TRUE POSITIVE TRUE TO LOAD DATA WORD 5 7 penu te ee eee S o 1 2 3 13 o 7 P 6 I N CONTROL WORD STROBE BIT DATA WORD STROBE BIT NEGATIVE TRUE POSITIVE TRUE 5 7 23 24 p 9 fs 22 WORD STROBE MAINFRAME ADDRESS NEGATIVE TRUE POSITIVE TRUE 23 24 8 10 lt oo 9 X N 722 Figure 609 4 4200 09 Jumper Connections cont 4 79 609 9 4200 09 R MAINFRAME ADDRESS s BINARY 16 BIT DATAWORD NEGATIVE TRUE LAST BIT NOT COMPLEMENTED 8 10 IE 4 7 oo T BINARY 16 BIT DATA WORD U DATA WORD INITIATES DATA COMPLEME
86. B101H253 C023B101H253 C023B101H253 C023B101H253 C023B101H253 C023B101H253 C023B101H253 C023B101H253 023B101H253 DMi5FA31J DM15F1831J DM15F431J 4200 09 TOT REC ary REF wa REF _ REF 19 REF REP REF REF REF REF REF REF REF REF REF REF REF REF REF REF REF REF REF REF REF REF REF REF REF REF REF VV 4 79 609 29 4200 09 Table 609 11 Multi Strobe Isolated Logic PCB Assembly cont MFG PART NO _ DESCRIPTION OR TYPE arvjorv CRI DIODE SI 150 MA 203323 04713 14418 7 CR2 DIODE HOT CARRIER 313247 28480 2811 7 2 CR3 DIODE HOT CARRIER 313247 28480 2811 REF DIODE CARRIER 313247 28480 2811 REF CR5 DIODE HOT CARRIER 313247 28480 2811 REF CR6 DIODE HOT CARRIER 313247 28480 2811 REF CRT DIODE SI 150 MA 203323 04713 1N4448 CRB DIODE SI 150 MA 203323 08713 IN4448 REF CRO DIODE SI 150 MA 203323 04713 1N4448 REF CR10 DIODE SI 150 MA 203323 08713 144418 REF CR11 DIODE HOT CARRIER 313247 28480 2811 REF CR12 DIODE HOT CARRIER 313247 28480 2811 REF CR15 DIODE SI 150 MA 203323 04713 1484448 CR16 DIODE SI 150 MA 203323 04713 1N4448 REF Q1 XSTR SI NPN 159855 07910 CS23030 17 6 Q2 XSTR SI NPN 159855 07910 CS23030 REF Q3 XSTR SI NPN 159855 07910 CS23030 REF Q6 XSTR SI NPN 159855 07910 CS23030 QT XSTR SI NPN 159855 07910 CS23030 i XSTA SI NPN 159855 07910
87. BE buttons The output should be 77Vac 0 1 Check that the 110 VOLT RANGE indicator is on and that the 4 2 and 1 indicators in both A and B decades are on Turn off the instrument and disconnect all test equipment Install the top dust cover Calibration is complete and the instrument is ready for use 4270A Section 5 Lists of Replaceable Parts BESIGRATOR ASSEMBLY NAME NUMBER PART NO PAGE AI Mother PCB Assembly 427044011 332908 5 6 A2 Power Supply PCB Assembly 4270A4061 332940 5 7 A3 Pre Amplifier PCB Assembly 42704 4051 332924 5 12 A4 External Reference PCB Assembly 03 Option 42104 4041 292581 5 17 5 BCD Ladder Assembly 4210 4403 292565 5 20 A6 Isolated Control Logic 4250A 4270A 01 365692 5 24 7 BCD Display PCB Assembly 4250A4013 302257 5 28 A8 Current Limit PCB Assembly 4270A 4081 332965 5 29 A9 Power Amp PCB Assembly 42704 4071 332957 5 34 A10 High Voltage Power Supply Assembly 4270A 4201 333005 5 40 42704 5 1 INTRODUCTION 52 This section contains an illustrated parts break down of the instrument Components are listed alph numerically by assembly Electrical components are listed by item number Each listed part is shown in an accompany ing illustration 5 3 Parts lists include the following information a Reference Designation or Item Number b Desc
88. BHD Lot 20 Jalan 225 P O Box 24 Petaling Jaya Malaysia Tel 3 743422 TLX 784 MA37764 Malta Fabian Enterprises 20 Msida Road Gzira Malta Tel 513283 40216 TLX 838 1837 Mexico Electronica y Tecnologia Avanzada S A de C V Pafnucio Padilla 53 5 Piso Centro Comercial 58100 Ciudad Satelite Estado de Mexico Tel 5 3930902 TLX 383 172697 Mexicana de Electronica Industrial S A Mexel Bivd Ptd Adolfo Lopez Mateos Nos 163 Col Mixcoac 03910 Mexico Tet 5 563 54 11 TLX 383 1771038 Nepal e Associated Enterprises GPO Box 790 Pyaphal Tole Kathmandu Nepal Tel 13868 Netherlands w Fluke Nederland B V Gasthuisring 14 P O Box 115 5000 AC Tilburg The Netherlands 13 352455 TLX 844 52683 New Zealand McLean Information Technology Ltd 459 Khyber Pass Road Newmarket P O Box 9464 Newmarket Auckland 1 New Zealand Tei 9 501 801 TLX 791 221570 McLean Information Technology Ltd Box 496 Wellington New Zealand Tel 4 851 450 or 844 424 Norway Morgenstierne amp Co A S Kongheilgate 3 P O Box 6688 Rodelokka Osio 5 Norway Tel 2 356110 TLX 856 71719 Oman OHI Telecommunications Box 889 Muscat Sultanate of Oman Tel 703862 TLX 926 3168 Pakistan International Operations PAK Ltd 505 Muhammadi House Chundrigar Road Box 5323 Karachi Pakistan Tel 21 22112
89. Box C9090 Everett WA 98206 Fiuke Holland B V P O Box 5053 5004 EB Tilburg The Netherlands Phone 013 673973 Litho in U S A 10 84 Portugal Lisbon Republic of Singapore Singapore Turkey Istanbul West Germany Ismaning Munich Pakistan Karachi International Operations PAK Ltd Tel 221127 239052 TLX 24494 PIO Peru Lima importaciones Y Representaciones Electronicas S A Tel 288650 TLX 25663 PE IREING Philippines Metro Manila Spark Radio amp Electronics Corp Tel 775192 704096 TLX 27901 RLA PH Decada Espectral Equipamentos de Electronica Lda Tel 2103420 TLX 15515 Rank O Connor s PTE Limited i Tel 637944 239052 TLX RS21023 OCONSIN Republic of South Africa Wynberg Fluke S A Pty Ltd Tel 786 3170 TLX 424328 Spain Madrid Equipos y Sistemas S A Tel 458 0150 TLX 42856 EYS Sweden Vailingby Teleinstrument AB Tet 380370 TLX 15770 Switzerland Zurich Traco Electronic AG Tel 2010711 TLX 815570 TRCO CH Taiwan Taipei Schmidt Electronics Corp Tei 5013468 11111 SCHMIDT 10548 EVERGOFT Thailand Bangkok Measuretronix Ltd Tel 378 2516 TLX 81143 DEJOBKK TH Erkman Elektronik Aletler Tel 4415461 TLX 24399 Uruguay Montevideo Coasin Uruguaya S A Tel 789015 TLX UY6571 OROCUER SA Venezuela Caracas Coasin C A Tel 239 0967 239 5079 TLX 21027 EMVEN VE Fluke Deutschland GmbH Tel 9
90. CH LOCATION g With the power switch off down connect the ac power cord and turn on the power switch Check that the POWER indicator on the front panel illu minates h Turn off power switch and assemble guard and top cover in reverse order of removal 2 8 RACK INSTALLATION 29 The power source is designed for bench top use or for installation in a 19 inch equipment rack using the accessory rack mounting kit shown in Figure 2 3 Accessory chassis slides can also be installed to better facilitate rack installation Information regarding installation of these accessories is given into the Section 6 Accessory Rack Mount ing Fixtures 2 10 OPERATING FEATURES 2 11 The location and function of all connectors and in dicators is given in Figures 24 and 2 5 2 2 FULL WIDTH RACK MOUNTINGS CHASSIS SLIDES Figure 2 3 ACCESSORY RACK MOUNTING KITS 4270A STATUS INDICATORS 02 OPTION ONLY Hluminate to indicate the programmed level and status of the power source GERENT LIRIE HA so DEBET E nr POWER INDICATOR when the power source is energized Figure 2 4 FRONT PANEL OPERATING FEATURES BARRIER STRIP SENSE TERMINALS Provide four terminai load connection See para 2 18 Contains the analog input output terminais EXT REF 03 Option POWER SWITCH Receives to 14 5 or Toggle switch used to energize gt the power source POWER Indicator peak ac signal h
91. CUIT BOARD Figure 6 2 EXTENDER PCB ASSEMBLY INSTALLED IN 4210A 4216A INSTRUMENT Figure 6 3 CABLE EXTENDER ASSEMBLY 4250A 4265A CONFIGURATION EXTENDER CAUTION INSTALL PCB COMPONENTS S FRONT 4270A 4275A CONFIGURATION EXTENDER CAUTION INSTALL PCB COMPONENTS 4200 Extender PCB Assembly and Cable Extender Assembly CIRCUIT BOARD ASSEMBLY CIRCUIT BOARD ASSEMBLY CABLE EXTENDER ASS Y Figure 6 5 EXTENDER PCB AND CABLE EXTENDER ASSEMBLIES INSTALLED IN 4270A 4275A INSTRUMENTS 6 3 REV 4 1 80 Section 7 General Information 7 1 This section of the manual contains generalized user information as well as supplemental information to the List of Replaceable Parts contained in Section 5 Aor amp ac at a d assy AWG bed cap ccw cer cermet ckt cmrr comp cont ert cw d a dac dB dc dmm dvm elect ext oF FET ff freq FSN gd GHz gmv gnd hd ampere alternating current audio frequency analog to digital assembly american wire gauge bel binary coded decimal Celsius capacitor counterclockwise ceramic ceramic to metal seal circuit centimeter common mode rejection ratio composition continue cathode ray tube clockwise digital to analog digital to analog converter decibel direct current digital multimeter digital voltmeter electrolytic externa farad Fahrenheit Fieid effect transistor flip flop f
92. Coto Coil Co inc Providence Rhode Island 71744 Chicago Miniature Lamp Works Chicago Illinois 71785 TRW Electronics Components Cinch Connector Operations Div Elk Grove Village Chicago Illinois 72005 Wilber B Driver Co Newark New Jersey 72092 Replaced by 06980 72136 Electro Motive Mfg Co Williamantic Connecticut 72259 Nytronics Inc Pelham Manor New Jersey 72619 Dialight Div Amperex Electronic Corp Brooklyn New York 72653 G C Electronics Div of Hydrometals Inc Brooklyn New York 72665 Replaced by 90303 72794 Dzus Fastener Co Inc West Islip New York 72928 Guiton Ind inc Gudeman Div Chicago Illinois 7 5 72982 Erie Tech Products Inc Erie Pennsylvania 73138 Bechman Instrument inc Helipot Division Fullerton California 73293 Hughes Aircraft Co Electron Dynamics Div Torrance California 73445 Amperex Electronic Corp Hicksville New York 73559 Carling Electric inc West Hartford Connecticut 73586 Circle F Industries Trenton New Jersey 73734 Federal Screw Products Inc Chicago litinois 73743 Fischer Special Mig Co Cincinnati Ohio 73899 JFD Electronics Co Components Corp Brooklyn New York 73949 Guardian Electric Mfg Co Chicago Illinois 74199 Quan Nichols Co Chicago Illinois 74217 Radio Switch Corp Marlboro New Jersey 74276 Signalite Div General Instrument Corp Neptune New Jers
93. Instrument Div Riverside California 80583 Hammariund Mfg Co inc Red Bank New Jersey 80640 Arnold Stevens Inc South Boston Massachusetts 81073 Grayhill Inc La Grange Illinois 81312 Winchester Electronics Div of Litton Industries Inc Oakville Connecticut 81483 Therm O Disc Inc Mansfield Ohio 81483 International Rectifier Corp Los Angeles California 81590 Korry Mfg Co Seattle Washington 81741 Chicago Lock Co Chicago Illinois 82305 Electronics Corp South Gate California 82389 Switchcraft Inc Chicago Illinois 82415 North American Phillips Controls Corp Frederick Maryland 82872 Roanwell Corp New York New York 82877 Rotron Inc Woodstock New York 82879 ITT Royal Electric Div Pawtucket Rhode Island 83003 Varo Inc Garland Texas 83058 The Carr Co United Can Div of TRW Cambridge Massachusetts 83298 Bendix Corp Electric Power Eatontown New Jersey 83330 Herman H Smith inc Brooklyn New York 83478 Rubbercraft Corp of America Inc West Haven Connecticut 83594 Burroughs Corp Electronic Components Div Plainfield New Jersey 83740 Union Carbide Corp Battery Products Div formerly Consumer Products Div New York New York 84171 Arco Electronics Great Neck New York 84411 TRW Electronic Components TRW Capacitors Ogailala Nebraska 84613 Fuse Indicator Corp Rockville Maryland
94. Manual Control Unit Connected to Typical Power Source Connectors Controls and Indicators External Trigger Generator Requirements Programming in the Auto Mode 4210A 4250A and abo 4200 Manual Control Unit Block Diagram Model A4200 MCU Timing Diagram Mother Board A1 Connector Assembly PCB Manual Control Unit Connector Assembly PCB Program Assembly Function Assembly RACK MOUNTING FIXTURES Accessory Rack Mounting Kits Rack Mounting Bracket Installation Dual Rack Mounting 0 Chassis Slide Installation PROGRAMMING CONNECTOR Male Programming Connector PAGE 5 28 5 33 5 39 5 41 6 3 6 5 6 1 63 64 6 8 6 9 6 15 6 17 6 19 6 20 6 21 6 1 6 2 6 2 6 3 6 1 continued on page v Rev 1 LIST OF ILLUSTRATIONS continued Rev 1 FIGURE 6 1 62 63 64 6 5 TITLE PAGE EXTENDER PCB ASSEMBLY AND CABLE EXTENDER ASSEMBLY PCB Assembly Extender k SG aS 6 1 Extender PCB Assembly Installed in 4210AM216 Instrument 6 2 Cable Extender Assembly 0 6 2 Extender PCB and Cable Extender Assemblies Installed in 4250AM2GSA In NE 6 3 Extender PCB and Cable Extender Assemblies Installed in 4270A 4275A Instruments 6 3 4270A 4270A List of Tables TABLE 11 12 2 1 3 1 4 1 42 4 3 6 1 6 2 6 1 6 2 6 3 TITLE Options i a Programming Input Outputs Programming Connector Data Operating Voltages Recomm
95. N 9 LIST OF REPLACEABLE PARTS XAG CURRENT LIMIT POWER 5 4 API BINARY 154 43 fi NP co BINARY ram be e lt c Jo F amp RIL 4 4 9142 2 Ce ARA lt lt lt lt 5 4 4 A2 4040 CN 7204 lt v R 88 10246 SLR 58 84 2512 lt UM 4 Qn gt 22 e Y mes A 5 ojos 1 lt REP 4 pm 235 5 SpA i EXT REF gt 49 RI Z abd gt 25 POLARITY M Ed Goma R25 R23 A EEV 219 i ZTO 0 on e AAA gt L2 20maA eps Lp gt dad 4 SN 210 270 8 4 VRWOLTAGE 5 4 LIOMA RANGE 2 2 GUARD WHT HARD NOTES tosic ere 2 SOLDERABI lt sumer Tc LIMITER G 4 CONNECTOR JACK gt lt ON PCR 3 KATPLCCONNI AT ATPL 1 2 55 3 1364 4 4 28v D 28v AC Le 5 28V AC 4 COMMON GUARD AIO SIB COMMON IZN CCRASSIS i ti 21 NOTES 1 ALL CAPACITANCE IN ORMS UNLESS 2 THE FOLL
96. NT ALL 16 BITS TRANSFER ACROSS GUARD 5V gt zl 5 i DATA WORD DOES INITIATE w CONTROL WORD INITIATES DATA TRANSFER ACROSS GUARD TRANSFER ACROSS GUARD J X CONTROL WORD DOES NOT INITIATE NOT READY FLAG FIXED DATA TRANSFER ACROSS GUARD TIME DURATION Figure 609 4 4200 09 Jumper Connections cont 609 10 4 79 quM J ener 2 AA NOT READY FLAG VARIABLE DD BINARY POLARITY IN CONTROL WORD STANDBY ASYNCHRONOUS 18 BIT DATAWORD WITH 4200 09 BCD POLARITY IN EITHER DATA OR CONTROL WORD EE TIME DURATION LAGE iw o N H F G i A B t 0 D o BINARY POLARITY BIT IN DATA WORD CC BINARY POLARITY IN DATA WORD STANDBY IN CONTROL WORD STANDBY ASYNCHRONOUS H x F G G A A UD E B E s B 9 Bey FS 56 D 0 BINARY 16 BIT DATA WORD WITH POLARITY AS LAST BIT T is 2 i 17 3 2222 16 1 o i 19 18 GG 16 BIT DATA WORD WITH POLARITY IN CONTROL WORD 4 79 FF POLARITY BIT Edu 15 EE 15 114 17 16 17 16 1 0 S 5 i9 18 19 18 uf uf J 9 Figure 609 4 4200 09 Jumper Connections cont 609 11 4200 09 HH STANDBY OPERATE SYNCHRONOUS CONTROL WORD POSITIVE T
97. ONG 1025 POLED PWR FAIL FLAG 28 6 4 4 MR MT TAE T en CONTROL WORD Be o 62191 QNE SHOT ABNORMAL STATUS 27 23 POLL STATUS a ns GROUND rj JUMPER n 9 4 n BVOLTS BG s NOT REAN FLAG lt 6 1 INTRODUCTION 6 2 The Model A4200 Manual Control Unit MCU with attaching interface cable and connectors is a manually operated program source for the 4200A series power sources Figure 6 1 shows the MCU connected to a typical FLUKE power source The purpose of the MCU is to per Accessory Model A4200 mit an operator to fully exercise the programmable functions of any 4200A series power source primarily for manual programming calibration and adjustment or for trouble shooting Secondly a synchronized oscilloscope display of a 4200A series power source output may be established and controlled with an MCU Figure 6 1 MODEL A4200 MANUAL CONTROL UNIT CONNECTED TO TYPICAL POWER SOURCE A4200 MCU 6 3 SPECIFICATIONS 64 There are no specifications for the Model A4200 MCU 65 INSTALLATION 6 6 The MCU is supplied with an interface cable and connectors designed to fit any of the 4200A series power sources The operating voltages for the MCU are supplied from the associated power source through the interface cable The interface cable also supplies the power source with all programming inputs initiated by the MCU Con nection of the MCU to the power
98. ONS 609 9 Since a program source not a human operator controls the 4200 09 Multi Strobe Isolated Logic the following operating instructions define program data required for 4200 09 operation Table 609 1 describes standard interface signals between the 4200 09 and a Binary format program source Table 609 2 describes standard interface signals between the 4200 09 and a BCD format program source Some program data variations are possible through jumper connection options to tailor the 4200 09 for operation with a specific program source Refer to Table 609 3 for Standard Jumper Assignments 609 2 CABLE ASSEMBLY CUSTOM BUILT TO SUITE PROGRAM SOURCE PROGRAM SOURCE INTERFACE CABLE ASSEMBLY 50 PIN CONNECTORS 56 CONNECTORS TO SUCCEEDING 4200 UP TO TOTAL OF EIGHT UNITS Figure 609 2 Multiple 4200 Connections 609 10 BINARY PROGRAM OPERATION 609 11 Binary Format 609 12 standard Binary program data format for 4200 09 Voltage Sources consists of a 16 bit data word and a 16 bit control word Refer to Figure 609 3 The control word can be less than 16 bits if less than eight voltage sources are programmed from one program source or if the External Reference or Current Limit Options are not installed Other Binary data formats are possible but they require changing 4200 09 pcb jumper connections 609 13 The first 14 bits of a 16 bit Binary data word contain voltage
99. OWING Pi Vv LOGIC GRO 4 57 common 9 y PCB CONNECT NV COMMON 7 EXTERNAL LOG gt gt Power suppu gt COMMON AL LOCKOUT NRER VREF SENSE VREF HIGH WA VA VA COMMON id VREF COMMON H VRER 25 Sr V DDER x DRIVERS 28 HIGH 2 RO io VA Roof ROR OTK t RO CCW 54 Rei 9 kaqa x ERO B COMMON 21 27 At AL R25 1 5 i 1 LADDER CLAMPS 1 1 1 1 1 1 T CRO e NOTES SWITCH LOGIC VS LINE VOLTAGE RN A y rs lt 1 TX i 1 1 gl 1 HIK 1 1 t 1 1 See Wi 1 1 1 I CRE Li 1 ORNI De 6 4 vet lt VAC EBB NAC COMMON 28 weit s 2 lt vic r lt lt SHIELDCGUARO GRN INPUT SHIELD BED lt z BAL i ant ORNI 225 I lt 2 K 3 LX 8 WHT
100. P 39 5 1 4W 188466 01121 CB3935 1 R50 RES COMP 390 5 1 4W 147975 01121 CB3915 REF R51 RES COMP 100 5 1 4W 147926 01121 1015 1 R54 RES COMP 3 3K 5 1 4W 148056 01121 083325 REF R59 RES COMP 1K 5 1 4W 148023 01121 CB1025 REF R60 RES COMP 1 5 1 48 148023 01121 CB1025 REF R61 RES COMP 1K 5 1 4W 188023 01121 CB1025 REF R62 RES COMP 680 5 1 4W 148007 01121 CB6815 3 R63 RES COMP 51 5 1 48 221879 01121 CB5105 REF 864 RES COMP 51 5 1 40 221879 01121 CB5105 REF R65 RES COMP 51 5 1 4W 221879 01121 CB5105 REF R67 RES COMP 600 5 1 44 148007 01121 CB6815 REF R68 RES COMP 680 5 1 4W 148007 01121 CB6815 REF R69 RES COMP 510 5 1 4W 218032 01121 CB5115 REF RTO BES COMP 1K 5 1 4W 148023 01121 CB1025 REF 871 RES MTL FLM 10K 15 1 8W 168260 91637 MFF1 81002F 1 R72 RES COMP 510 5 1 4W 218032 01121 CB5115 REF RT3 RES COMP 1 5 1 4W 148023 01121 1025 REF 875 RES COMP 1 5 1 4W 148023 01121 1025 REF R81 RES COMP 3 3K 5 1 1W 148056 01121 CB3325 REF R86 RES COMP 1 6K 5 1 4W 266197 01121 1625 1 R87 RES COMP 2 5 1 4W 202879 01121 2025 1 R88 RES COMP 200 5 1 4W 193482 01121 2015 REF R89 RES COMP 3 3K 5 1 4W 188056 01121 CB3325 REF R91 RES COMP 51 5 1 4W 221879 01121 CB5105 REF T TRANSFORMER 299594 89536 299594 6 TRANSFORMER 299594 89536 299594 REF 4 79 609 31 4200 09 Table 60
101. Pulses one to load the control word and one to load the data word 609 46 Single strobe operation employs one Strobe Pulse Line and one Strobe Control Line to load both the data word and control word into the 4200 09 storage registers A Binary control word is loaded into the registers by placing the required logic level on the strobe control line and placing a strobe pulse on the contro word strobe line A Binary data word is loaded into the registers by reversing the strobe control line logic leve and supplying a second strobe pulse In this manner a single strobe line is used to load both the data and contro words by changing the strobe control line logic level 609 47 Single strobe operation is established by jumpering pads 2 3 4 11 12 and 13 The standard configuration Strobe Control line high 5V to transfer the control word and low OV to transfer the data word requires jumpers from pad 2 to pad 4 and from pad 1110 pad 12 To reverse the Strobe control logic sense jumper pad 3 to pad 4 and leave the jumper from pad 11 to pad 12 in place Refer to Figure 609 4 609 48 Dual strobe operation requires two Strobe Pulses on two separate Strobe Pulse lines to load the data word and control word into the 4200 09 registers A pulse on the data word strobe line loads a 16 or 18 bit data word into the the storage registers a pulse on the contro word strobe line loads the 6 or 8 bit control word into the registers 609 49
102. R DATA WORD ONE SHOT FIRST HOLD ONE SHOT 800 ns DATA TRANSFER 1 1 l NOT READY FLAG l FLIP FLOP CLOCK OUTPUT URATION DEPENDS ON ONE SHOT D POWER SOURCE USED Figure 609 11 Input Sequence Timing Diagram 609 90 STATUS LOGIC 609 91 Voltage sources through the 4200 09 can provide two status indications current limit and power failure Either status indication is accompanied by an Abnormal Status flag usually used as a program source interrupt to initiate a status poll sequence The voltage source supplies a current limit indication when an overload condition exists and the current limit function is in use The Power Fail flag is generated within the 4200 09 Multi Strobe Isolated Logic 609 92 A Current Limit flag occurs when the voltage Source generates a current limit signal The current limit signal is passed to the 4200 09 Option where it enables a current limit oscillator circuit Oscillator output coupled across is half wave rectified then AND gated with the program source Status Enable signal to produce a Current Limit flag output The current limit signal from the rectifier through OR gating also initiates an Abnormal Status flag 609 93 A Power Fail flag occurs when the voltage to the 4200 09 logic fails Power Fail flag circuitry requires a positive 5V input to supply Vcc to the power fail logic when power does fail Under normal operating c
103. RUE STANDBY POSITIVE TRUE T M DNA 17 16 0 19 2248 4 I KK STANDBY OPERATE SYNCHRONOUS CONTROL WORD NEGATIVE TRUE STANDBY POSITIVE TRUE is N RT 17 16 7 NL 6 JJ STANDBY OPERATE SYNCHRONOUS CONTROL WORD POSITIVE TRUE OPERATE POSITIVE TRUE 4 N 17 16 z a gt i 19 18 I LL STANDBY OPERATE SYNCHRONOUS CONTROL WORD NEGATIVE TRUE OPERATE POSITIVE TRUE s N 17 16 i 19 18 Ta I MM STANDBY OPERATE ASYNCHRONOUS STANDBY POSITIVE TRUE aa 17 16 o 19 18 o H 127 G 25 26 4 7 00 4275A 09 STANDARD BINARY PP 4275 POLARITY IN CONTROL WORD NN STANDBY OPERATE ASYNCHRONOUS OPERATE POSITIVE TRUE b 17 16 19 18 2 H F Q 27 G 25 26 4 7 Figure 609 4 4200 09 Jumper Connections cont 609 12 4 79 609 19 BINARY PROGRAM DATA COMPLEMENTING 609 20 Binary data words representing negative voltage outputs are two s complemented and must be recomplemented by the 4200 09 circuitry to obtain the required power source output polarity When jumpering is performed to receive Binary data from the program source pads J K L M W X and Y complementingto accomplish this is automatically performed Since the complementing process must not comple
104. SF France Paris Electronique S A 868131 TLX 695414 Greece Athens Hellenic Scientific Representations Tel 7211140 TLX 219330 Hong Kong Wanchai Schmidt amp Co H K Ltd Tel 8330 222 TLX 74766 SCHMC HX india Bombay Hinditron Services Pvt Ltd Tel 8121316 TLX 112326 HSPL IN India Bangalore Hinditron Services Pvt Ltd Tel 33139 TLX 0845741 HSPL IN India New Delhi Hinditron Services Pvt Ltd Tei 619118 TLX 0314890 SRMP Indonesia Jakarta Selatan Dwi Tunggal Jaya Sakti Tel 716374 TLX 47308 DIJS 1 Israel Ramat Hasharon R D T Electronics Engineering Ltd Tel 483216 TLX 32143 IL Italy Milan Sistrel S p A Tel 6181893 TLX 334643 Italy Rome Sistrel S p A Tel 5915551 TLX 680356 dapan Tokyo John Fluke Mfg Co Inc Japan Branch Tet 434 0185 TLX 2424331 FLUKJPJ Korea Seoul Electro Science Korea Co Tet 583 7703 TLX 25381 ESKOREA Malaysia Petaling Jaya Mecomb Malaysia SON BHD 743422 TLX MA37764 MECOMB Mexico Mexico D F Electronica y Tecnologia Avanzada de Tei 393 09 02 or 393 57 62 TLX 172697 BIOSME Netherlands Tilburg Fluke Nederland B V Tel 352455 TLX 52683 New Zealand Auckland McLean Information Technology Ltd Tel 501 801 501 219 TLX NZ21570 THERMAL Norway Oslo Morgenstierne amp Co A S Tel 356110 TLX 71719 e John Fluke Mfg Co Inc P O
105. Street Staines Middlesex TW18 457 England Tei 784 63555 TLX 851 928855 Venezuela e Coasin C A Calle 9 Con Calle 4 Edif Edinurbi Apartado de Correos NR 70 136 Los Ruices Caracas 1070 A Venezuela Tel 2 239 0967 TLX 395 21027 Yugoslavia Amtest Associates Ltd Clarence House 31 Clarence Street Staines Middlesex TW18 4SY Engiand Tel 784 63555 TLX 851 928855 Supplied and Supported by Fluke Holland B V Box 5053 5004 EB Tilburg Zevenheuvelenweg 53 5048 AN Tilburg The Netherlands Tel 013 673973 TLX 52237 Supplied and Supported by Fluke international Corporation Box C9090 Everett WA 98208 U S A Tel 206 356 5500 TLX 152662 JOHN FLUKE FLUKE e TECHNICAL SERVICE CENTERS U S A CA Burbank _ John Fluke Mfg Co Inc 213 849 4641 CA Santa Clara John Fluke Mfg Co Inc 408 727 8121 CO Denver John Fluke Mfg Co Inc 803 750 1228 FL Orlando John Fluke Mfg Co Inc 805 896 2296 IL Rolling Meadows John Fluke Mfg Co Inc 312 398 5800 MA Burlington John Fluke Mfg Co Inc 617 273 4678 MD Rockvilie John Fluke Mfg Co Inc 301 770 1576 NJ Paramus John Fluke Mfg Co 201 262 9550 TX Dallas John Fluke Mfg Co inc 214 233 9945 WA Everett John Fluke Mfg Co inc 206 356 5560 Other Countries Argentina Buenos Aires Coasin S A Tel 552 5248 3485
106. The instrument should be thoroughly inspected immediately upon origina delivery to purchaser All material in the container should be checked against the enclosed packing list The manufacturer will not be responsible for shortages against the packing sheet unless notified immediately If the instrument is damaged in any way a claim should be filed with the carrier immediately To obtain a quotation to repair shipment damage contact the nearest Fluke Technical Center Final claim and negotiations with the carrier must be completed by the customer The JOHN FLUKE MFG CO INC will be happy to answer all applications or use questions which will enhance your use of this instrument Please address your requests or correspondence to JOHN FLUKE MFG CO INC P O BOX C9090 EVERETT WASHINGTON 98206 ATTN Sales Dept For European Customers Fluke Holland B V P O Box 5053 5004 EB Tilburg The Netherlands For European customers Air Freight prepaid John Fiuke Mfg Co Inc P O Box C9090 Everett Washington 98206 Rev 6 81 SECTION TITLE 1 INTRODUCTION AND SPECIFICATIONS 11 INTRODUCTION 1 6 SPECIFICATIONS 2 OPERATING INSTRUCTIONS 24 INTRODUCTION 2 3 SHIPPING INFORMATION WEE 2 6 INPUTPOWER Cou mepo pnan a ADS 2 8 RACK INSTALLATION 2 10 OPERATING FEATURES 2 12 OPERATING NOTES 2 14 Line Connection 20 020 2 16 Load Connections 2 18 Remote Sensing 2 20 Ground Connections 2 22 Guard Con
107. W Not used Res var cermet 200 10 1W Res met flm 3 32k 1 1 8W Res met fim 30 9k 1 1 8W Not used Res comp 100m 10 Not used Res comp 5 Res comp 1 5k 5 Res comp 5 1k 5 Res met flm 40 2k 1 1 8W Res comp 10 5 Res met flm 187k 1 1 8W Res met flm 374k 1 Res met flm 750k 1 W Res met flm 1 27M 1 W Res var cermet 100k 10 1W Res met flm 107k 1 4W Res ww 6 8k 0 03 4W Res met flm 2k 1 1 8W Res met flm 10k 1 1 8W Res comp 22k 5 4W Res comp 10k 5 4W Res met flm 49 9k 1 W 285122 285130 285148 312652 235275 190520 148023 148031 193342 235333 147868 296376 262105 155192 229252 288308 296384 254359 277137 291633 148130 148106 182890 3605 500 3605 101 3608 201A MFF1 83R32F MFF1 830R9F 1071 1025 1525 5125 MFF1 840R2F CB1005 MFF1 81873F MFF1 23743F MFF1 2753F FFI 21R27A1 F 3605 104 MFF1 21073F 244359 MFF1 8202F MFF1 8103F CB2235 CB1035 MFF1 249R9F DESCRIPTION Res met 2 1k 1 AW Res comp 100 5 Res met flm 10k 1 Res met flm 4 87k 1 AW Res met flm 2 49k 1 Res comp 910 5 Res comp 680 5 Res ww 45 1 1 8W Res comp 20k 5 IC TTL Monostable Multivibrator Socket IC 14 contact 193276 147926 151274 247775 19399
108. a fault in the power source 6 15 Coax Jack Cluster 6 16 Three BNC coaxial cable connectors located on the top panel of the MCU provide connections for test instru ments The common of these connectors is tied to logic ground 6 17 Trigger Input 6 18 TRIGGER INPUT jack provides an input con nection for an external trigger generator to produce a remote manually controlled STROBE pulse when the MCU is in the AUTO EXT mode The external trigger generator replaces a 10kHz multivibrator when the EXT pushbutton is depress ed An external 510 termination resistor is provided in the MCU for the external trigger generator For optimum per formance the trigger generator should have an output pulse impedance of 509 and be capable of producing the wave form shown in Figure 6 3 1 20 76 4200 BCD CODE BLK FOR 4210A 4250A amp 4270A BINARY CODE BLK FOR 4216A amp 4265A BINARY CODE BCD FOR 42754 16384 8192 4096 2098 1024 512 256 128 64 32 16 SIGN POL 8192 4096 2048 1024 512 256 128 64 32 16 i 4 1 i POLARITY MOS A DECADE B DECADE C DECADE D DECADE SWITCH SN 7 Select polarity of S M MAGNITUDE AND POLARITY PROGRAM SWITCHES output voltage OUT SS IN DH agn wawa cma sur AMPHENOL RANGE CONNECTOR SWITCH Receives interface Selects Cable Assembly Provides 5V ready low OUT a LIMIT FLAG signal and OV not or high 7 INDICATOR CONTROL ready signal range amp MODE COAX EN
109. a microsecond wide that is negative going descending from 5 to OVdc The pulse is inverted once through inverter U1B to be used as a trigger output pulse at J5 and is inverted a second time through inverter U1A to be applied to the programmable power source via the interface cable W1 and programming connect ors The sequential output of the 10kHz driven binary counter is applied to the power source through any closed magnitude program switch in each decade following inversion through inverter U2 MODEL A4200 MCU TIMING DIAGRAM 6 9 A4200 MCU 6 54 With external mode selected by the control mode switch S10 the previously selected auto mode switch is disconnected through interlock action This removes the 10kHz multivibrator output from the input to the binary counter and from the input to the auto strobe generator Switched into these two input circuits is trigger input jack J4 Hence use of an externally controllable trigger generator is possible providing the parameters are generally as follows output pulse frequency of 10kHz 0 5us pulse width and having an output pulse impedance of about 50 ohms The external trigger generator substitutes for the internal 10kHz multivibrator in the external mode and cir cuit activity is essentially the same as discussed in auto mode 6 55 function program switches provide a logic level low signal on the appropriate line to the connected power source when a given fun
110. a particular serial number by consulting the Use Code Effectivity List below AH parts with no code are used all serial numbers 123 and on NOTE These Use Codes and Serial Number Effectivity apply to this option only For the standard instrument configuration see Section 5 paragraph 5 9 and for additional options see the appro priate option subsection USE CODE SERIAL NUMBER EFFECTIVITY 6 3 4200 SERIES OPTION 07 REF DES DESCRIPTION BCD LADDER PCB ASSEMBLY 07 Option FIGURE 6 2 cer 0 05 uF 20 100V TOTRECM USE 322602 149161 Dio silicon 150 mA 203323 Dio FET current regulator 285106 269084 Xstr silicon NPN Xstr silicon NPN 218396 Xsir silicon PNP 269076 Not used 195974 Xstr J FET N channel U2366E Matched Pair Xsir J FET N channel U2366E Matched Pair Xstr J FET N channel U2366e Matched Pairs 014 matched to 016 018 matched to 020 306399 306381 306373 J FET N channel U2366E Matched Set 298299 Xstr J FET N channel 288324 Res var cermet 2000 10 1 2w 285148 Res ww 24 987k Res ww 49 975k Matched Resistor Set 289827 Res ww 100 025k 64 1 20 75 4200 SERIES OPTION 07 Figure 6 2 BCD LADDER PCB ASSEMBLY 1 20 75 6 5 4200 SERIES OPTION 07 6 6 Res ww 200 075
111. a single ended drive signal to Q7 This drive signal is developed across Q6 which functions as a high impedance constant current source for Q4B The final quasi differential amplifier Q7 and Q8 supplies a drive signal to the emitter follower output stage of Q13 This stage provides a low impedance output to drive the Vg gp high line 014 functions as a high imped ance current source for Q13 Diodes CR1 and CR2 provide connection to the feedback line when Q9 and Q10 are turned off 3 62 FET GATES 3 63 application of the external reference to the in ternal stet lines is controlled by Q9 and Q10 Q9 connects the feedback line to sense and 010 connects the ex ternal reference to the internal high line Drivers 011 and Q12 control the on off condition of Q9 and Q10 in conjunction with the EXT REF and STANDBY commands at terminals 13 and M 3 64 When an EXT REF command OV exists at termin al 13 Q11 is turned off and V is applied to both the emitter and base of Q12 This condition turns off Q12 and switches FET gates Q9 and Q10 on thus applying the extemal reference to the internal Vp gp line The same con dition occurs when a STANDBY command OV exists at terminal M Diodes CR3 and CR4 provide isolation between the input command lines 3 65 Should a STANDBY or EXT REF command 5 exists Q11 will be switched on and turn on Q12 Conduc tion of Q12 applies V 4 to the gates of Q9 and 010 which
112. aced by 43543 05279 Southwest Machine amp Plastic Co Glendora California 05397 Union Carbide Corp Materiais Systems Div New York New York 05571 Use 56289 Sprague Electric Co Pacific Div Los Angeies California 05574 Viking Industries Chatsworth California 05704 Repiaced by 16258 05820 Wakefield Engineering Inc Wakefield Massachusetts 06001 General Electric Co Electronic Capacitor amp Battery Products Dept Columbia South Carolina 06136 Replaced by 63743 06383 Panduit Corp Tinley Park illinois 06473 Bunker Ramo Corp Amphenol SAMS Div Chatsworth California 06555 Beede Electrical Instrument Co Penacock New Hampshire 06739 Electron Corp Littleton Colorado 06743 Clevite Corp Cleveland Ohio 06751 Components Inc Semcor Div Phoenix Arizona 06860 Gould Automotive Div City of Industry California 06961 Vernitron Piezo Electric Div Formerly Clevite Corp Piezo Electric Div Bedford Ohio 06980 Eimac Div Varian Associates San Carlos California 07047 The Ross Milton Co South Hampton Pennsylvania 07115 Replaced by 14674 07138 Westinghouse Electric Corp Electronic Tube Div Horsehead New York 07233 TRW Electronic Components Graphic City of industry California 07256 Silicon Transistor Corp Div of BBF Group inc Chelmsford Massachusetts 07261 Aumet Corp Culver City California 0726
113. ahoma 17545 Atlantic Semiconductors inc Asbury Park New Jersey 17856 Siliconix inc Santa Clara California 17870 Replaced by 14140 18178 Vactec Inc Maryland Heights Missouri 18324 Signetics Corp Sunnyvale California 18612 Vishay Resistor Products Div Vishay Intertechnology Inc Malvern Pennsylvania 18736 Voltronics Corp Hanover New Jersey 18927 GTE Sylvania Inc Precision Material Group Parts Division Titusville Pennsylvania 19451 Perine Machinery amp Supply Co Seattie Washington 19701 Electro Midland Corp Mepco Electra Inc Mineral Welis Texas 20584 Enochs Mfg inc indianapolis indiana Federal Supply Codes for Manufacturers cont 20891 Self Organizing Systems inc Dallas Texas 21604 Bucheye Stamping Co Columbus Ohio 21845 Solitron Devices Inc Transistor Division Riveria Beach Florida 22767 Semiconductors Palo Alto California 23050 Product Comp Corp Mount Vernon New York 23732 Tracor inc Rockville Maryland 23880 Stanford Applied Engrng Santa Clara California 23936 Pamotor Div Wm J Purdy Co Burlingame California 24248 Replaced by 94222 24355 Analog Devices inc Norwood Massachusetts 24655 General Radio Concord Massachusetts 24759 Lenox Fugle Electronics Inc South Plainfield New Jersey 25088 Siemen Corp Isilen New Jersey 25403 Amperex Electronic Corp Semiconductor amp Micr
114. an cloth is usable Interior sections of the instrument are cleaned using clean dry air at low pressure 4270A Section 4 Maintenance 4 9 Air Filter Cleaning 4 10 removeable air filter is attached to the rear panel and against the blower by a covering bracket that is held in place by four screws This air filter should be re moved and cleaned frequently to remove accumulations of dust and grease The air filter is removed by unscrewing the four covering bracket screws removing the bracket and separating the bracket and filter Cleaning is done by rinsing the filter in hot detergent solution frequntly for best re sults After the filter is dry install it as indicated by the air flow arrow scribed on the frame of the filter Secure the filter bracket to the rear panel with four screws 4 11 Fuse Replacement NOTE Turn off power switch and disconnect instrument from power supply line power before replacing fuse 4 12 power fuse is located on the rear panel of the instrument If replacement is necessary use the following rated fuses AC LINE AC LINE VOLTAGE VOLTAGE 100 2A AGC 200 1A AGC 115 Sio Blo 230 Slo Blo 125 250 44 4270A 4 13 MAINTENANCE ACCESS 4 14 Access to the interior of the instrument shown in Figure 4 1 is as follows Turn off the power switch and disconnect the power cord from line power b Remove the top dust cover and the underlying guard cover to gain acce
115. and install the screws If necessary wrap the wiring bundle to provide a proper diameter for the re straining clamp Connect the male programming connector to the female connector on the rear panel of the instru ment Fasten them securely with the end clips CABLE RESTRAINING Figure 6 1 MALE PROGRAMMING CONNECTOR 6 1 4200 Extender PCB Assembly and Cable Extender Assembly 6 6 Cable Extender Assembiy The removal of certain interconnected printed circuit boards requires the use of a cable extender assembly to reconnect the board to its original electrical configuration after the board is inserted into the extender PCB The cable extender assem bly is shown in Figure 6 3 and is obtained by or dering FLUKE PART NO 337584 Usage of the cable extender assembly is shown in Figures 6 4 and 6 5 for the instruments requiring 4210A 4216A CONFIGURATION 6 2 EXTENDER PCB ASS Y CAUTION INSTALL PCB COMPONENTS SIDE FRONT its use Normally the cable extender assembly is not used with the 4210A 4216A instruments un less troubleshooting of the power supply PCB would require separating and remotely locating the ac input power controls and input transformer The cable extender assembly would join the ac input power controls and input transformer to the power supply PCB After the extender PCB assembly and test PCB and where required the cable extender assembly are connected the power can be applied CIR
116. applied to the address lines of the first voltage source source number zero Only address line zero supplies an address signal to the voltage source all other addresses are shifted to the next lowest numerical address line see Figure 609 7 The address signal originally issued on address line number one exits the first voltage source on address line number zero for use by the second voltage source Each address signal is shifted by one address line position through each succeeding voltage source Therefore voltage source number seven the eighth and last receives only one address signal on the zero address line Several voltage sources may be addressed at the same time and each will receive the program data simultaneously Table 609 4 lists the pin numbers of the 50 pin connector on voltage source zero used for addressing each voltage source ina multiple source system NOTE In single strobe Binary operation the address need only be present when transferring ihe control word When transferring the data word the voltage source which last received a control word is automatically addressed 4 79 4200 09 MAINFRAME ADDRESS LINES FROM PROGRAM SOURCE 7 4200 09 NO ZERO 6 6 7 4200 09 NO 1 5 5 6 7 4200 09 NO 2 4 0 4 5 6 7 4200 09 3 3 0 3 4 5 6 7 4200 09 NO 4 2 wal 0 2 3 4 5 6 7 4200 09 5 E a2 3 4 5 6 7 4200 09 NO 6 0 0 1 2 3 4 5 6 7 4200 09 NO 7
117. at its previously programmed level while new data is transferred into memory and allowed to settle At the end of the 15us pulse the power source is allowed to respond to the new program data The 1105 pulse provides a NOT READY flag output that indicates the power source has not had time to respond to new program data and for the output to be within 0 01 of the program med change for a resistive load Program data must be present and settled for a minimum of 2 4us after the nega tive transition of the DATA STROBE NOTE When the power supply is initially turned on or if a power interruption occurs the power sup ply is programmed to zero volts where it will remain until new data is transferred 2 35 Flag Outputs 2 36 Two flag outputs are provided to indicate when a current overload exists and when the output voltage has had time to settle A current limited condition I LIMIT is indicated by a Logic 1 at pin 49 of the programming connector Normal operation is indicated by a Logic 0 Output settling time is indicated by a NOT READY flag at 37 Logic 07 is the ready condition and indicates that the output voltage has had time to settle to within 0 0196 of the programmed change for a resistive load A Logic 1 indicates a not ready condition 2 37 The I LIMIT flag and the NOT READY flag sill both be activated when a sink or source current overload occurs After the overload is removed the I LIMIT flag
118. ation 69 The 00 260 610 18 or 00 280 610 24 Chassis Slide Kit should be installed to better facilitate dual rack mounting or installation of full width rack units To 38 32 DUAL RACK FASTENER 309708 2 PLACES EACH FRONT AND BACK CORNERS Figure 6 3 DUAL RACK MOUNTING install these components and mount the units or unit in the equipment rack proceed as follows Peel the center side panel decals from the instru ment Peel the rear side panel decals from the instrument Remove the six screws from the rear panel corner brackets and then remove the brackets Slide the spacer A into the center section of the side panel until the tapped holes are aligned with the holes in the side panels Scribe a line on spacer where it protrudes from the rear of the side panel and then remove it from the instrument Cut off the spacer at the scribe mark and then in stall it in the side panel 4200 Rack M ounting Install the rear panel corners Attach the chassis section B to the side panels with the screws C provided in the kit Install the cabinet sections E and center sections D in equipment rack The extension angle brack ets which are part of section E are mounted at the rear of the cabinet Slide the center sections D toward the front of the cabinet until they lock in place Depress the spring locks on the chassis sections B and insert the instrument between the extende
119. ation with an internal establishes an output in millivolts directly propor tional to the digital input word The value of R is in creased by four times in the 100V range by disconnecting one of the Re resistors Subsequently outputs in the 100V range are four times the digital input word When the exter nal is selected the output is proportional to the com bined effects of the external reference magnitude and the digital input word Actual output is determined as follows 10V Range Eout MPW x 10 EXT REF 100 Range Eout 4MPW x 10 EXT REF Where MPW Magnitude of digital input word EXT REF External reference voltage V dc or peak ac 3 11 Programming changes are prevented from appear ing at the output until the entire digital input word is stored This is provided through the sample and hold circuit in the A3 Preamplifier Presence of a STROBE input to the A6 Logic produces a HOLD command which activates the sam ple and hold circuit The sample and hold disconnects and 3 2 stores the last input to the voltage amplifier thus providing a memory condition for the duration of the HOLD command The HOLD command has a duration of 15usec 3 12 Overload protection circuitry in the A9 Power Amp lifier automatically limits the maximum output current to 0 6A Whenever a current limit occurs an I LIMIT command is applied to the A6 Logic which then produces a CURR ENT LIMIT FLAG output Current l
120. aving on the front panel illuminates when the quency from dc to 30 kHz power source is energized Input resistance is 100k See para 2 42 OUTPUT TERMINALS POWER CONNECTOR AIR FILTER Provide connection to the Provides connection load See para 2 16 through the power cord to line power GUARD TERMINAL PROGRAMMING CONNECTOR Provides for load connections FEMALE AMPHENOL that reduce Contains the digital input output connections required for program ming An accessory mating con nector not shown is provided common mode signals See para 2 22 FUSE Protects the ac input circuitry 100 115 125 VAC 2A AGC 200 230 250VAC 1A AGC CHASSIS TERMINAL Provides connection to chassis and earth ground See para 2 20 Figure 2 5 REAR PANEL OPERATING FEATURES 2 3 4270A 2 12 OPERATING NOTES 2 13 The following paragraphs describe various condi tions which should be considered before operating the Model 4270A 2 14 AC Line Connection 2 15 The input power cord plug is a three prong polar ized connector This plug allows connection to a 100 to 250 volts ac 50 to 60 Hz power line see Input Power paragraph 2 6 and connects the power source chassis to earth ground Always ensure that the ground pin is con nected to a high quality earth ground The power source is energized through a toggle switch on the rear panel 2 16 Load Connections 2 17 eight term
121. been transformer coupled across the guard and into the second shift register for application to the 4200 Voltage Source 4 79 The control word since it contains eight bits or less is actually shifted around the control word register across the guard and into the second control word register two complete times during the 16 clock pulses 609 80 The control word is double buffered for application to the 4200 Voltage Source This is necessary since the hold signal provided during data transfer by the second hold one shot does not freeze the output range of the 4200 Voltage Source just the output magnitude To parallel shift the control word from the shift register to a set of latch circuits the first of the 16 clock pulses triggers a latch timing one shot which has a pulse width slightly greater than the serial data transfer time 16 clock pulses The trailingedge ofthe latch timing one shot output is fed to a pulse generator which provides a load pulse to the latch circuits At the time of the load pulse the latch circuits are parallel loaded with the control word for application to the 4200 Voltage Source 609 81 COMPLEMENTING BINARY DATA NOTE Complementing magnitude data occurs only in Binary type voltage sources 609 82 Binary program sources usually supply two s complemented magnitude data and a polarity bit for negative outputs Binary type voltage sources require non complemented Binary data and a polarity bit Ther
122. binary magnitude inputs into an associated power source Each pushbutton is labeled with one or more bit values depending upon unit serialization Units bearing serial No 224 and below are labeled entirely in black Units bearing higher serial numbers labeled in black and red The red coding applies to 1 the binary magnitude used to program the 4275A power source and 2 to the current magnitude used to program the current limit option when installed in the 4270A and 4275 power sources The black coding applies to both binary and BCD magnitude power sources with the location and format of the magnitude bits identifying related power source effectivity as follows The black binary magnitude bits above the pushbuttons apply to the 4216A and 4265A power sources The black BCD magnitude bits below the pushbuttons apply to the 4210A 4250A and 4270A power sources In MANUAL mode the magnitude inputs are programmed directly by depressing a single or combination of magnitude pushbuttons In AUTO mode an internal binary counter controls the manually selected magnitude inputs in a four bit binary pattern Each output of the binary counter is parallel connected to the four correspond ing BCD or binary magnitude programming switches shown in Table 6 1 The power source input program is sequenced in a pattem that is determined by the selected magnitude program switches and the binary counter outputs Figure 6 4 shows the power source output vo
123. bmitted before work is started if requested THE FOREGOING WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY FITNESS OR ADEQUACY FOR ANY PARTICULAR PURPOSE OR USE JOHN FLUKE MFG CO INC SHALL NOT BE LIABLE FOR ANY SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER IN CONTRACT TORT OR OTHERWISE if any failure occurs the following steps should be taken 1 Notify the JOHN FLUKE MFG CO INC or nearest Service facility giving full details of the difficulty and include the number type number and serial number On receipt of this information service data shipping instructions will be forwarded to you 2 On receipt of the shipping instructions forward the instrument transportation prepaid Repairs will be made at the Service Facility and the instrument returned transportation prepaid SHIPPING TO MANUFACTURER FOR REPAIR OR ADJUSTMENT All shipments of JOHN FLUKE MFG CO INC instruments should be made via United Parcel Service or Best Way Prepaid The instrument should be shipped in the original packing carton or if it is not available use any suitable container that is rigid and of adequate size If a substitute container is used the instrument should be wrapped in paper and surrounded with at least four inches of excelsior or similar shock absorbing material CLAIM FOR DAMAGE IN SHIPMENT TO ORIGINAL PURCHASER
124. c 10 50 to 60 Hz 200 watts fully loaded 0 C to 50 C operating 40 C to 75 C storage 0 to 80 20G 11 millisecond half sine wave 4 5G 10 to 55 Hz 0 to 10 000 feet operating 50 000 feet and above non operating 5 high x 17 wide x 19 7 16 Max deep Allows manual checkout calibration and control FLUKE Model A4200 05 205 600 M00 260 610 18 00 280 610 24 Amphenol Blue Ribbon 57 30500 FLUKE PART NO 266056 FLUKE PART NO 292623 FLUKE PART NO 337584 4270A 2 25 7 16 FRONT VIEW SIDE VIEW Figure 1 1 OUTLINE DRAWING Table 1 2 PROGRAMMING INPUT OUTPUTS PROGRAM CONTROL program control and response lines are compatible with DTL and TTL logic Programming lines are brought out on the rear panel on Amphenol connector J1 See Figure 1 2 LOGIC LEVELS Logic 1 0 4Vde or contact Logic 0 2 0 to 5 0Vde or open closure circuit SIGN Connector Pin 35 Logic 1 Negative output voltage MAGNITUDE Bit Conn Bit Conn Bit Conn Wt Pin Wt Pin Wt Pin AS 1 9 E 43 at 2 10 E 44 3 11 E 45 4 12 E 46 Be 5 D 13 F Bt 6 p 14 07 Option 7 02 15 B 8 D 16 NOTE Decade numbers greater than 9 10 thru 15 will be accepted and converted to an equivalent analog value The maximum full scale output is 110 DATA STROBE Connector pin 33 When using the Isolated C
125. cals from the sides of the front handles Place the instrument face down on its handles and remove the four mounting screws two upper and two lower which secure the lateral cross bracket to the front panel at the rear of the Al PCB Disconnect the Al PCB guard wire from the lower guard by removing the lug screw Place the instrument normal side down and remove all the screws from the sides of both front handles or from the front corner panels in the event the instrument was rack mounted p Pull the entire front panel assemblies free of the instrument and at the same time dislodge those PCB s which may be still inserted into the Al motherboard q To separate the Al and A7 PCB pair from the front panel remove the large screws that secure the PCB pair to the front panel by means of the teflon standoffs 1 To separate the Al and 7 PCB pair from each other after they are removed from the front panel remove all the small screws from the Al PCB Separate the Al and A7 PCB by pulling the two boards perpendicularly apart 5 Assembly of the instrument is accomplished by reversal of the order of disassembly with attention to connection of the A2 PCB guard wire that was removed in step The air filter and blower are removed from the rear panel by removing the filter cover screws the filter cover the filter the blower screws and the blower line power plug u Instructions for cleaning and installation of th
126. ch switch tightly against the PCB The installed switch set must be align ed with the adjacent switch set and with the PCB evenly or else the switch assembly will not fit through the slots on the top panel at final assembly Check that the newly installed switch sei is operating correctly and install the PCB into the MCU as defined under maintenance access 6 98 Limit Flag Indicator Replacement 6 99 following eleven paragraphs describe the pro cedure to be followed when a defective indicator is to be replaced in the MCU 6 100 Refer to the List of Replaceable Parts to determine the FLUKE part number for the indicator to be replaced and order it in conformance with the part ordering instruc tions 6 101 Install replacement indicator in the MCU as follows a Perform maintenance access procedures to the step that removes the motherboard con nector PCB Assembly from the MCU b Locate insulating sleeving that covers one of the wires leading into the rear of the defec tive indicator and slide it back along the wire until the amp connector it covers is fully exposed Observe color coding of wires for later hook up With a long pointed soldering tool unsolder the amp connector uncovered in the previous step from an indicator lead Repeat with the other indicator lead and clean both amp con nectors internally of any residual solder d Using a blunt instrument or rod of sufficient diameter to clear th
127. ck that 110 VOLT RANGE is out and that the output is OVdc 10uV Repeat steps a b and c to achieve this tolerance if necessary Depress RANGE POL A decade 8 and STROBE for 80 high range output Check that 110 VOLT RANGE and SIGN indicators are on Adjust A2 A80 for an output of 80Vdc t Release POL and depress STROBE for a 80V high range output Check that SIGN goes out and the A decade 8 stays on Adjust A2 80 for an output of 80 1mV Release RANGE depress STROBE and check that 110 VOLT RANGE goes out and the A decade 8 stays on Adjust A8 for an output of 8Vdc t 100uV Release A decade 8 depress A decade 4 and STROBE Check that only A decade 4 indicator light is on Adjust A4 for an output of 4Vdc 100uV Release 4 depress 2 and STROBE Check that only A decade 2 indicator light is on Adjust A2 for an output of 2Vdc 100uV Release 2 depress 1 and STROBE Check that only A decade 1 indicator light is on Adjust A1 for output of 1Vdc t 10uV Release 1 depress B decade 8 2 and 1 and STROBE Check that B decade indicators 8 2 and 1 come Adjust B15 for an output of 1 1Vde t 10uV Release all MCU buttons except MANUAL and depress STROBE Check that output reads zero volts and that only the POWER indicator is on 4 23 4 24 External Reference Adjustments 03 Option If the A4 External Reference PCB Assembl
128. ction switch is depressed The SIGN POL switch 17 is shown as an example typical of these switches 6 56 The indicator light LIMIT FLAG on the MCU top panel is essentially a duplication of the I LIMIT indicator on the front panel of 4200A series power source Hence these two indicators can be expected to illuminate together when a specified current limit point is reached 6 57 Circuit Description 6 58 The following paragraphs briefly describe the cir cuitry in the MCU Each description unless otherwise noted is referenced to the schematic diagram A4200 1000 located at the end of this section 6 59 CONTROL MODE SWITCHES The control mode Switches consist of three single pole double throw switches on the A3 Function Assembly S10 through S12 These Switches are the ganged interlock pushbutton type and only one switch at a time can be closed and latched Switch S12 the MANUAL mode switch when depressed and latched applies a logic low 0 volts to the four set input lines of the four bit binary counter U3 pins 3 5 10 and 12 This forces the counter outputs on pins 4 6 9 and 11 to a logic high 5 volts When the AUTO mode switch S11 is de pressed and latched the MANUAL mode switch is interlock released to its non depressed state This applies 5 volts to the binary counter previously held low by the latched but now released MANUAL mode switch and permits the count er to be advanced by the 10kHz multivibrator input at
129. d center sections D on the cabinet Slide the instrument completely into the equip ment rack and secure in place with fasteners through the mounting brackets Figure 6 4 CHASSIS SLIDE INSTALLATION 6 3 4200 Connector Accessory Programming Connector 6 1 INTRODUCTION 6 2 The Amphenol male programming connector shown in Figure 6 1 is used to interface the instrument to a programming source This male programming connector mates with the female programming connector that ismount ed on the rear panel of the instrument A male connector is normally supplied with each instrument less cabling but may also be ordered directly from Amphenol under PART NO 57 30500 or from the John Fluke Mfg Co Inc by referencing FLUKE PART NO 266056 6 3 ASSEMBLY INSTRUCTIONS 64 Cabling connections to the male programming connector are done as follows a Remove the screws from the terminal cover of the male connector and remove the cover and num bered terminal pin insert b Remove the screws from the restraining clamps on the cover and spread the clamps c Thread the cable wiring through the terminal cover Maximum size is 22 d Solder the wiring to the appropriate terminals of the numbered insert Refer to Figure 6 1 for ter minal locations Use pin cover to support insert during soldering Slide the covers together and install the attaching screws Close the restraining clamp around the cable
130. d to provide power for most analog circuitry Diode bridge rectifies the tapped secondary voltage of T1 and supplies positive and negative voltages for the respective V 4 regulators C7 and C8 filter these rectified voltages 3 28 V regulator consists of 012 013 and U4 Reference voltage for this regulator is derived from A2 in the supply and is applied to the non inverting input of U4 The inverting input of U4 receives a sample of the output voltage from the divider R36 and R37 Any vari ations in the V output are thus sensed by A4 which con trols the base drive to Q12 producing a regulated 23 4V dc output Q13 together with R33 function to limit the maxi mum output current of this supply to 125 ma Should the current through R33 exceed 125ma the voltage across R33 will turn on Q13 which limits the base current to Q12 3 29 V A regulator consists of 014 015 and 05 R40 and the A supply establish the reference current for the feedback resistor R41 US supplies the base drive required by Q15 to maintain the regulated output of 25 1V dc Q14 and R39 limit the output current in a similar manner to Q13 and R33 described previously 3 3 4270A 3 30 tVg SUPPLY 3 31 t Vg Supply on A10 produces unregulated 136 volts dc operating voltages for the A9 Power Amplifi er Diodes and through are connected as two full wave rectifiers with C2 and C3 acting as filte
131. dc or short circuit to logic ground Logic ground is available at pins 17 through 24 of the programming connect or Shorting these lines to the appropriate pins of the pro gramming connector using contact closures also allows con trol of the power source The internal 5Vdc output cur rent limited by 2 7 ohms is available at pin 25 for use by the external programming logic DIGITAL INPUTS ULTI LEXER CHASSIS 4270A 2 27 Standby 2 28 STANDBY mode can be programmed by ing a Logic 1 to pin 34 of the programming connector When this condition exists the output of the power source will be driven to less than 1 of the programmed value Application of a logic O at this pin returns the output voltage to the programmed level 2 29 Range Output Magnitude Polarity 2 30 Two voltage ranges are available 10 volts and X10 volts The RANGE is programmed by a single binary input at pin 29 of the programming connector A Logic 0 applied to this pin will program the 10 volt range and a Logic 17 will program the X10 volt range The power supply is capable of an output of 110Vdc minimum at 0 55 ampere 2 31 The magnitude of the output voltage is program med by applying either BCD or four bit binary per decade coding using 8 4 2 1 format to pins 1 through 16 of the program connector Four decades of programmable voltage are available each receives a four bit 8 4 2 1 co
132. ded input The maximum program of any decade is 8 4 2 1 15 which provides a total output program of 16 665 volts on the 10 volt range with a programmable resolution of ImV If BCD coding is used the maximum programmable output on the 10 volt range is 9 999 volts When using the X10 CIRCUITRY TO GUARD CAPACITANCE 2 GUARD TO CASE CAPACITANCE E COMMON MODE VOLTAGE Figure 2 7 GUARDED LOAD CONNECTION 2 5 4270A Table 2 1 PROGRAMMING CONNECTOR DATA LOGIC 0 2 0 to 5 0Vdc or open circuit LOGIC 17 0 4 or short circuit to LOGIC GRD ADECADE 1V 10V range 10V 100V range BDECADE 1V 10V range 1V 100V range 0 00 L GOO N CDECADE 0 01V 10V range 0 1V 100V range D DECADE gt 0 001D 10V range 0 01V 100Vrange ANP WOH N DWH N O N P0 LOGIC GRD LOGIC PWR 5Vdc current limited by 2 7 ohms internally NOT USED RANGE LOGIC 0 10 VOLT Range 16 665 max LOGIC 1 100 VOLT Range 110 max NOT USED DATA STROBE 01 Option See Figure 2 8 INITIATES DIGITAL TO ANALOG CON VERSION STANDBY OPERATE LOGIC 0 OPERATE LOGIC 1 STANDBY EXTERNAL REFERENCE 03 Option LOGIC 0 INTERNAL REFERENCE LOGIC 1 EXTERNAL REFERENCE READY NOT READY FLAG LOGIC 0 READY LOGIC 1 NOT READY NOT USED CURRENT LIMIT 06 Option gt Function Logic 0 Logic 1 Range 100mA 1 amp Magnitude 0
133. duration of the hold pulse depends upon the particular voltage source being used 609 78 The trailing edge of the first hold one shot output triggered by the strobe signal sets a data transfer flip flop The Q output of the data transfer flip flop starts 10 MHzclock if not already operating refer to Standby Sequence and gates the clock pulses to the serial shift inputs of the control word and data word shift registers The clock pulses are also gated to the input of the 16 counter and to the primary winding of 74 As each clock pulse is received by the shift registers the previously loaded program data is shifted serial by bit out of the shift registers to the coupling transformers T3 and T5 at the guard shield On the inside of the guard shield the serial data and control words are loaded into a second set of shift registers which are clocked by the pulses at the secondary of 74 609 79 Clock pulses gated by the data transfer flip flop are also fed to a 4 bit Binary counter which produces a carry pulse at the time of the sixteenth clock pulse The carry pulse resets the data transfer flip flop to inhibit the gating of the clock pulses and stop the clock if the standby mode is not present Refer to Standby Sequence After the generation and gating of 16 clock pulses the data has shifted completely around the shift register and has been restored in the register exactly as it was prior to the data transfer Data has also
134. e 07 Option are located in Section 1 of the manual 65 INSTALLATION 6 6 Use the following procedure to install the 07 Option into the Model 4210A Disconnect the power cord from line power b Remove the top dust cover and the inner guard cover c Remove the A5 BCD LADDER ASSY by using agentle rocking motion and an even rearward pull ing force 1 20 75 4200 SERIES OPTION 07 Option 07 100uV Resolution d Remove four mounting screws on rear panel adja cent to Programming Connector 1 e Insert the 07 Option A5 BCD Ladder into LADDER receptacle J2 on MOTHER ASSY f Attach Programming Connector J1 panel to rear panel of instrument using the four screws removed in step d 8 Replace inner guard and top dust cover h Reconnect power cord to line power 6 7 OPERATING INSTRUCTIONS 6 8 Programming Information 69 Operation of the 42104 with the 07 Option is done in a manner similar to operation with the 01 Option Isolated Control Logic described in Section 2 Program ming input output lines for the Programming Connector are given in Table 6 1 6 1 4200 SERIES OPTION 07 Tabie 6 1 PROGRAMMING INPUT OUTPUTS LOGIC 0 2 8 to 5 5Vdc or open circuit LOGIC 41 0 0 4Vde or short circuit to LOGIC A DECADE 1V B DECADE 0 1V 0 00 C DECADE 0 01V D DECADE 0 001V E DECADE 0 0001V o
135. e air filter are given on the frame of the filter itself See paragraph 4 10 4 15 INVERTED CONTROL LOGIC 4 16 Isolated Control Logic can be altered to provide inverted logic levels This is accomplished by jumpering to appropriate PCB pads Refer to the table on the Isolated Control Logic Schematic Diagram 4275A 1021 sheet 1 of 2 The table indicates the proper jumper configuration for normal and inverted logic levels for each 42704 model of the 4200 series instruments Jumper locations are identified by alphabetical designations which appear on the schematic diagram and the PCB NOTE The same Isolated Control Logic PCB Assembly is used in all models of the 4200 series instru ments However the PCB s are not interchange able until the jumper configuration is changed in accordance with the table on the 4275A 1021 schematic diagram Therefore insure that any control logic assemblies used as replacements conform to the jumper configuration shown in the table before installing the assembly in the instrument 4 17 CALIBRATION PROCEDURES 4 18 recommended period between successive cal ibrations for this instrument is 90 days or annually The instrument must be calibrated following repairs Use the test equipment defined in paragraph 4 2 Table 4 1 Assem bly adjustment and test point locations are shown in Fgirue 4 1 Table 4 2 shows binary by decade coding for output magnitude control
136. e blower motor at the blower itself The latter requires removal of the blower filter bracket filter and fan as outlined in paragraph 4 10 The blower cable is then removed within a protective grommet from a rear panel slot to free it from the instrument chassis f This step is readily accomplished providing that the 2 PCB assembly is previously removed from the instrument since greater freedom of movement isallowed Remove the overall assemblage de scribed in previous step by lifting vertically out of the instrument while simultaneously rotating the 42 assemblage obliquely to clear the rear panel over hang Exercise care in withdrawing the flatwire cable AIOWI and connector A10A1 with the assemblage to prevent damage With the assemblage removed from the instrument and placed on a level clean surface and the power transformer being farthest away remove the two machine screws securing the shorter longitudinal brace to the lateral cross brace Remove the six machine screws from the longer longitudinal brace These screws secure the A10 PCB to the brace Hold the power transformer steady and withdraw the A10 PCB with attaching parts from the transformer cable receptacle 1A1J1 Separation of the short longitudinal brace from the A10 heat sink and filter capacitors is accomplished by releasing the heat sink alignment clip screw and the two screws in the capacitor support brackets these latter two being hidden beneath
137. e inside of the indicator retaining cup push the indicator out the retaining cup from the rear Observe orient ation upon removal for later installation of replacement e Using the removed indicator as a guide for the new indicator clip the correct lead at the base and the other two leads to the proper length f Insert the indicator into the cup in the same exact orientation as observed during removal of the defective indicator Connect both amp connectors identically to the earlier observed hook up and solder con nectors to the indicator leads using minimal heat and solder h Slide the insulating sleeving over the amp connector to insulate the bare indicator leads from each other i Assemble the MCU in accordance with pro cedures given under maintenance access A4200 MCU 6 102 TROUBLESHOOTING 6 103 The troubleshooting of an improperly responding and defective power source when under control of an MCU is not covered in this section Troubleshooting the power source is covered however in the basic instrument maintenance section of the manual and may not include use of the MCU as a troubleshooting aid On the other hand the first indication that troubleshooting is necessary will be an improperly responding power source that is under control of an MCU Consequently the first step in using these troubleshooting procedures is to determine that the MCU is faulty and not the associated power source 6 104 T
138. ed to the J1 programming connector on the MCU gain access to the motherboard 1 Connector Assembly and locate test points 1 through 5 See maintenance access procedures paragraph 6 81 Proceed with troubleshooting procedures given on drawing No A4200 1800 6 13 A4200 MCU MODEL A4200 TROUBLESHOOTING PROCEDURES Power Off Checks Inspect MCU for improperly seated plug in assemblies loose or broken wires damaged or burned compo nents or other obvious problems Check that switches are aligned and that no broken switch return springs are evident Check that connectors are properly attached to motherboard Al Connector Assembly from coaxial jacks and from LIMIT FLAG indicator Power on Checks Apply 5 Vdc to MCU in either of two ways to deter mine that power input and distribution circuits are continuous Hither apply power by connecting inter face cable connector to power source and turning on power switch or by locating test points 4 and 3 and applying 5Vdc to these test points from the and applying 5Vdc to these test points from the SVdc power supply If MCU is connected to a power source as defined above check for 5Vdc between test points 4 and 3 If MCU is connected to the SVdc power supply at test points 4 and 3 2 check for 5V de between pin 25 and any pin of the group number 17 through 24 on the unconnected interface cable connector Failure to measure the required voltage
139. efore negative Binary magnitude data complemented data from the program source must be recomplemented to satisfy voltage source requirements 609 83 The first bit of serial data is present at the shift register output before the 16 counter and complement flip flop receive the first of 16 clock pulses At that time the 16 counter is in its zero state and the complement flip flop is still reset a result of the 16 counter carry pulse at the end of the previous data transfer With the complement flip flop in a reset state the complement logic is disabled and no inversion of serial data occurs Data will be serially shifted until the first 1 data bit With a 1 at the complement flip flop the trailing edge of the clock pulse sets the complement flip flop The first 1 bit is therefore tranferred non inverted All data bits after the first one are inverted except the last bit which is the polarity bit The carry output from the 16 counter is coincident with the last clock pulse so theleadingedge of the carry pulse resets the complement flip flop Since this takes place just prior to the last data bit the last bit is tranferred non inverted If it is necessary to invert the last data bit pad A may be jumpered to pad C placing U13in the carry bit circuit to produce a delay With the carry bit delayed the last data bit will be complemented before the complement flip flop is reset 4 79 4200 09 609 84 STANDBY OPERATION 6
140. eld silicon serial number shift register tantalum terminal board temperature coefficient or temperature compensating temperature compensated crystal oscillator test point micro 1075 ultra high frequency microsecond s 10 9 unit under test volt voltage variable voltage controlled oscillator very high frequency very low frequency watt s wire wound transformer transistor crystal crystal oscillator ohm s micro 10 5 Federal Supply Codes for Manufacturers 00213 Nytronics Comp Group inc Subsidiary of Nytronics Inc Formerly Sage Electronics Rochester New York 00327 Welwyn International Inc Westlake Ohio 00656 Aerovox Corp New Bedford Massachusetts 00686 Film Capacitors Inc Passaic New Jersey 00779 AMP Inc Harrisburg Pennsylvania 01121 Alien Bradley Co Milwaukee Wisconsin 01281 TRW Electronic Comp Semiconductor Operations Lawndale California 01295 Texas instruments Inc Semiconductor Group Dallas Texas 01537 Motorola Communications amp Electronics Inc Franklin Park Illinois 01686 RCL Electronics Inc Manchester New Hampshire 01730 Replaced by 73586 01884 Use 56289 Sprague Electric Co Dearborn Electronic Div Lockwood Florida 02114 Ferroxcube Corp Saugerties New York 02131 General Instrument Corp Harris ASW Div Westwood Maine 02395 Rason Mfg Co Brooklyn New York 02533 Sneigrove C
141. elease all MCU buttons that were de pressed except MANUAL Allow the instrument to operate for about one half hour and then remove the top dust cover 4 27 4 28 Depress POL A decade 8 2 1 CURRENT LIMIT MA or X10 80 20 and then STROBE An 11Vdc output with 100 current limit is called Check that the following indicators are on A decade 8 2 1 CURRENT LIMIT MA X10 40 10 and I LIMIT Adjust A8 REF for an output of 5Vdc t15mV Check that the I LIMIT indicator is on Release CURRENT LIMIT MA or buttons X10 80 and 20 depress 10 and STROBE Check that CURRENT LIMIT or 5 indicator and I LIMIT indicator are on This action calls the 5mA current limit 10 percent current limit Adjust 8 I for output of 50mVdc 0 5mV Release POL button depress STROBE and check that SIGN indicator goes out This action calls a 11Vdc output Adjust A8 I for an output of 50mVdc 50 5 Release CURRENT LIMIT MA or 10 button and depress X10 80 20 and STROBE buttons This action calls the 0 5A current limit 100 percent current limit Check that the output is 5Vdc X 100mV and that the following indicators are on X10 40 10 and I LIMIT Repeat the procedure starting at step d if output is not within tolerance Release MCU buttons and depress STROBE to output Also remove the 10 ohm resistor Final Zero Adjustment The following adjustments must be performed only
142. ended Test Equipment Binary by Decade Coding Linearity Checks OPTION 07 100uV RESOLUTION Programming Input Outputs Resolution Check MODEL A4200 MANUAL CONTROL UNIT Programming Switches Controlled by the Binary Counter 4200A Series Instrument Ranges Current Limit Programming With 06 Option Current Limit Programming With 06 Option PAGE 12 15 2 6 33 43 45 47 6 2 6 3 6 7 6 7 6 7 4270A Section 1 Introduction amp Specifications 1 1 INTRODUCTION 1 2 The Model 42704 is a programmable bipolar de voltage source and power amplifier Output voltage is from 0 to 110 in two ranges 10 and X10Vdc Pro gramming resolution using the internal reference voltage is 1mV on the 10 volt range and 10mV on the X10 volt range Output accuracy is given in paragraph 1 6 After a 100us settling time a READY flag indicates that the output has settled to 0 01 of the programmed level for a resistive load The output current is rated at 0 5 ampere maximum and is limited to approximately 0 6 ampere in the event of an overload or short circuit The sink current milliamps is rated at 500 4 5 our maximum A Programmable Current Limiter Option 06 is available to allow program ming the maximum output current to a lower level A current limit flag indicates when a sink or source current overload exists with or without the 06 Option 1 3 Programming requirements are compatible with
143. erminal 18 of P1 and switches Q4 and 05 on The resulting OV gate voltage at Q3 switches it on and applies analog common to R26 Q1 and Q2 are switched off by conduction of Q5 which applies V by their gates 347 LADDER CLAMPS 3 48 Ladder Clamps consisting of CR5 CR6 R47 and R48 limit the summing junction voltage at the input of Q18 Clamp signals at terminals 7 19 and W of Pi turn on CRS or CR6 during a current limit condition This minimizes any output voltage transients at the output of A9 Power Amplifier if the load causing the current limit condition is suddenly removed 349 VOLTAGE RANGE SWITCHES 3 50 The Voltage Range Switches and Drivers consisting of Q30 through Q34 select the appropriate feedback resist ance and frequency compensation for the 10V and 100V range In the 10V range a 5V command is present at terminal 14 of P1 This voltage turns off Q34 and Q33 which in turn switch on FET gates Q30 through Q32 Conduction of Q31 and Q32 connects R39 R40 R42 and R43 across R36 and R35 The end of this network that connects to pin 4 of P1 ultimately becomes the HIGH SENSE terminal at the output of the power source The frequency response of the Preamplifier in both voltage ranges is controlled by Q31 In the 32V range conduction of Q30 by passes R34 and C2 thus connecting only R33 and C1 to the Preamp lifier output In the 100V range a OV command at terminal 14 of P1 turns on Q34 and Q33 which turns
144. escribed internal VREF and applies the output of the A4 External Reference to the Vggg bus line If a STDBY command exists the external is disabled 3 10 ladder networks in the Preamplifier and 5 BCD Ladder scale the selected internal or external VREF Figure 3 1 POWER SOURCE EQUIVALENT CIRCUIT 3 1 4270A RANGE TOWER E surety TRG PREAMPLIFIER A10 CONN My r E wage be TRG POWER AMPLIFIER KIGH SENSE e B OVERLOAD esame E Ver T ROTECTION COMMON Vi COMMON COMMON iw 2 SENSE TRET BINARY LADOER FRONT PANEL OISPLAY EXT REF cow CURRENT LIMIT COMMANDS ext stoay Br Cm or 0 As ISOLATED CONTROL LOGIC STROBE aoe Be ADYINOT CURRENT DIGITAL INPUTS CURAENT EADY FLAG LIMIT COMMANDS FLAG Figure 3 2 MODEL 4270A BLOCK DIAGRAM to a level determined by the A B and C commands This scaled voltage is then inverted and amplified by voltage and power amplifier in the A3 Preamplifier and 9 Power Amp lifier Current through Rr in the Preamplifier maintains a proportional output voltage dependent upon the value of Rg ladder and polarity of In the 10V range the tot al parallel value of in combin
145. ey 74306 Piezo Crystal Co Carlisle Pennsylvania 74542 Hoyt Elect Instr Works Penacook New Hampshire 74970 Johnson E F Co Waseca Minnesota 75042 TRW Electronics Components IRC Fixed Resistors Philadelphia Pennsylvania 75376 Kurz Kasch inc Dayton Ohio 75378 CTS Knights Inc Sandwich Hinois Federal Supply Codes for Manufacturers cont 75382 Electric Corp Mount Vernon New York 75915 Littlefuse Inc Des Plaines Illinois 76854 Oak Industries Inc Switch Div Crystal Lake Illinois 77342 AMF Inc Potter amp Brumfield Div Princeton Indiana 77638 Generai Instrument Corp Rectifier Division Brooklyn New York 77969 Rubbercraft Corp of CA LTD Torrance California 78189 Shakeproof Div of Illinois Tool Works inc Elgin iitinois 78277 Sigma Instruments Inc South Braintree Massachusetts 78488 Stackpole Carbon Co Saint Marys Pennsylvania 78553 Eaton Corp Engineered Fastener Div Tinnerman Plant Cieveland Ohio 79136 Waldes Kohinoor Inc Long Isiand City New York 79497 Western Rubber Company Goshen Indiana 79963 Zierick Mfg Corp Mt Kisko New York 80031 Electro Midland Corp Mepco Div A North American Phillips Co Norristown New Jersey 80145 LFE Corp Process Control Div formerly API Instrument Co Chesterland Ohio 80183 Use 56289 Sprague Products North Adams Massachusetts 80294 Bourns inc
146. f Replaceable Parts to determine the FLUKE part number for the switch set to be replaced and order the switch set in conformance with part ordering instructions 6 97 Following receipt of the correct replacement 6 12 switch set determine that it is operating correctly and then remove the switch set containing the defective switch as follows a Using a small soldering iron and a solder re moving tool unsolder all of the switch set mounting tabs from the circuit board pads and remove as much liquified solder as pos sible with the solder removing tool b Prevent adherence of the cooling tabs to the pads by vibrating each tab in its pad with a pair of needlenose pliers or a similar tool c After all tabs are unsoldered from the pads remove the entire switch set from the PCB and exercise care to remove the PCB spacers that are attached to the switch tabs Make a layout sketch of the positions of the spacers on the switch set d Remove the spacers from the defective switch set and install them each one on the new switch set in accordance with the layout sketch made in the previous step Press the spacers tightly against the switches cleaning out any flowed solder that prevents full sur face contact between the spacers switches and PCB e Insert the new switch set into the PCB in the same orientation as the adjacent switch set top side up f Solder all tabs into the PCB pads and be care ful to press ea
147. fg Co inc ITT Cannon Gremar Santa Ana California 91802 Industrial Devices Inc Edgewater New Jersey 91833 Keystone Electronics Corp New York New York Federal Supply Codes for Manufacturers cont nn u 91836 King s Electronics Co Inc Tuckahoe New York 91929 Honeywell Inc Micro Switch Div Freeport Illinois 91934 Miller Electric Co Inc Div of Aunet Woonsocket Rhode Island 82194 Alpha Wire Corp Elizabeth New Jersey 93332 Sylvania Electric Products Semiconductor Products Div Woburn Massachusetts 94145 Replaced by 49956 94154 Use 94988 Wagner Electric Corp Tung Sol Div Newark New Jersey 94222 Southco Inc formerly South Chester Corp Lester Pennsylvania 95146 Alco Electronic Products inc Lawrence Massachusetts 95263 Leecraft Mfg Co Long Island City New York 95264 Repiaced by 98278 95275 Vitramon Inc Bridgeport Connecticut 95303 RCA Corp Receiving Tube Div Cincinnati Ohio 95348 Gordo s Corp Bloomfield New Jersey 95354 Methode Mfg Corp Rolling Meadows Illinois 95712 Bendix Corp Electrical Components Div Microwave Devices Plant Franklin Indiana 95987 Weckesser Co Inc Chicago Illinois 96733 San Fernando Electric Mfg Co San Fernando California 96853 Gulton Industries Inc Measurement and Controls Div formerly Rustrak Instruments Co Manchester New Hampshire 96881 Thomson Industries i
148. ficant digit MSD of output magnitude bits 5 through 8 program the second significant digit 2SD bits 9 through 12 program the third significant digit 38D bits 13 through 16 program the least significant digit LSD Bit 17 programs the polarity and bit 18 programs output range The first control word data bit programs the external reference mode if the voltage source is equipped with the external reference option The second control word data bit programs the current output limit range for those voltage sources equipped with current limit selection control word bits 3through 6 program the current limit magnitude The advantage of the 18 bit data word is that it keeps the BCD output magnitude commands separate from the control commands Output magnitude programming can thus be changed without effecting previously programmed control data Also if there is no current limit or external reference to be programmed only one data word is necessary to control the voltage source To obtain 18 bit data word and 6 bit control word the board comes with a jumper from pad T to pad S Refer to Figure 609 4 18 BIT DATA WORD 6 BIT CONTROL WORD MSD 28D 350 LSD POLARITY BIT OUTPUT RANGE BIT EXTERNAL REFERENCE MODE BIT CURRENT LIMIT RANGE BIT 4 BIT CURRENT LIMIT MAGNITUDE Figure 609 5 BCD Program Data Typical 18 Bit Data Word 6 Bit Control Word 4 79 609 13 4200 09 609 26 A ma
149. flag bus responds with a 5V level if that voltage source is not in a current limit condition 609 59 POLLED POWER OFF FLAG 609 60 power off flag is available when a voltage source is polled as is the current limit flag When the program source polls the power source the poll status line is placed at ground level and the power off status flag responds with a ground level if power is off The voltage source can only respond with a ground level indicating the power off condition if 5 volts is supplied to pin 40 of the 50 pin connector The external 5 volts is required for circuit operation if an actual power off condition exists 609 61 INPUT LOADING 609 62 Each input of each 4200 09 voltage source represents a single TTL input load In a multiple source system the power requirements for each input of the first voltage source exept the address and standby operate inputs increases by a factor representing the number of sources in the system In BCD voltage sources standby operate inputs are single TTL loads as are the address lines In Binary voltage sources only the address lines are single loads the standby operate input loads ina multiple source system increase by a factor representing the number of sources in the system 609 17 4200 09 CURRENT LIMIT FLAG BUS ABNORMAL STATUS POWER OFF 2252 BUS Z FLAG BUS BUS h POLL STATUS 16 27 29 28 4200 09
150. form any programming function The addressing signal must be present in order for any strobe signal to be recog nized by the 4200 09 logic Addressing is by a Logic 1 on address line zero Refer also to Addressing Multiple Main frames ah 4 79 609 5 4200 09 Table 609 2 Input Output Signals BCD Program Source cont leur mum SIGNAL NAME DESCRIPTION 50 PIN 56 PIN CONN CONN 21 amp 6 thru 11 Instrument mainframe Seven lines through connections used to address up to 45 thru 50 addresses one through seven succeeding voltage sources seven 18 13 Control word strobe Single line which accepts a Logic 1 1 us or longer pulse to load the control word portion of the program data into the 4200 09 assembly Refer also to Dual Strobe Operation 36 14 Data word strobe Single line which accepts a Logic 1 1 us or longer pulse to load the data word portion of the program data into the 4200 09 assembly Refer also to Dual Strobe Operation 9 15 Poli status Single line used to poll status Vcc failure and current limit mode A Logic 1 causes the generation of Vcc and current limit status of their respective outputs 29 22 Polled current limit Single line which generates Logic 1 when the polled 4200 flag is in the current limit mode 28 21 Polled power off Single line which generates a Logic 1 when the Vcc supply of the polled 4200 fails power off 27 23 Abnormal status Sin
151. ge to negative voltages produced across resistor R51 by the output current manner similar to 17 and Q17B Transistors 024 Q21 Q23 and Q22 correspond in function to Q18 through Q20 and Q27 respectively 3 105 GROUND ISOLATOR 3 106 The Ground Isolator circuit composed of tran sistors Q1 and Q2 isolate the ground currents flowing in COMMON from those in COMMON The input logic lines driving the first transistor of each pair of FET Drivers the emitters of the drivers are referenced to COMMON indirectly through transistors Q1 and Q2 Thus the only current through the point of commonality of Va Vg is base current of Q1 and this has but a negligible effect in the OUTPUT LOW sense line 3 107 MINUS 16 VOLTS POWER SUPPLY 3 108 Diode CR2 a 16 volt zener produces 16 volts at test point 4 This voltage is used in the Ground Isolator the FET Drivers and U3 and U4 3 109 A9 Power Amplifier 4270A 1071 3 110 The A9 Power Amplifier produces the final output voltage and current of the power source It also provides both source and sink current limit protection of the bipolar output The circuitry consists of an input amplifier driver clamp circuitry current sources output stage and current limit detector 34111 INPUT AMPLIFIER 3 112 The Input Amplifier composed of Q9 through 011 and Q20 through Q25 amplifies the input appearing at ter 3 12 minal D of Pi The resulting voltage a
152. gle line which generates a Logic 1 whenever the 4200 goes to the current limit mode or the Vcc supply fails power off This status line does not need to be polled 30 24 Vcc Single line which provides Vcc to the status logic on the 4200 09 This is necessary in order to obtain polied power off status when power is off Current requirement is two milliamperes per power source 16 25 Ready flag Single line which provides a Logic 1 for a fixed time period after receipt of a strobe signal The time period is equal to worst case settling time after the source is programmed to a new output level 609 6 4 79 4200 09 Table 609 3 Standard Jumper Configurations VtoW AtoB EtoF Gto A TtoM 25 to 26 1104 16 BIT DATAWORD 6107 9 to 10 11 to 13 14 to 15 16 to 17 18 to 20 22 to 23 2to4 5to7 8 10 111012 14 to 17 16 to 19 16 BIT CONTROL WORD el 28 29 219 ait 2028 252 22 213 14 BIT BINARY WORD VOLTAGE MAGNITUDE STROBE CONTROL BIT POLARITY BIT STANDBY OPERATE BIT OUTPUT RANGE BIT EXTERNAL REFERENCE MODE BIT CURRENT LIMIT RANGE BIT CURRENT MAINFRAME LIMIT ADDRESS MAGNITUDE ONE TO FOUR BITS EIGHT BITS NOTE In 4250A and 4270A voltage sources equipped with the 07 option current limit magnitude bits program a fifth decade of voltage output magnitude Current limit range bit has no function with 07
153. gram data Starting the clock pulses is a function of the control logic stopping the clock pulses is also a function of the control logic but after the generation of 16 pulses When the clock is stopped all shifting action ceases and after the hold signal disappears and the load pulse to the latch occurs all program data is presented to the digital to analog converter within the 4200 Voltage Source At this time the voltage source assumes its newly programmed output 609 71 Block Diagram Analysis 609 72 INPUT SEQUENCE 609 73 Parallel program data supplied by the program source is applied to a pair of shift registers Refer to Figure 609 10 Identical program data is supplied to all 4200 09 voltage sources in a multiple source system but only those sources addressed by the program source will accept the data Program data is loaded into the input registers only when an address signal and the appropriate strobe signal are present 609 74 In a device configured for single strobe operation the control word strobe signal in conjunction with the strobe control line is used to load both the data word and control word into their respective registers The strobe signal gating accepts the control word strobe from the program source and depending upon the state 5 volts or ground of the strobe control line directs the strobe signal to either the control word one shot or the data word one shot If the strobe control line directs t
154. hbutton Each push of the STROBE push button generates a 0 5us STROBE pulse which transfers the previously selected manual program to the internal registers of the isolated control logic option 01 Option In the event the power source is equipped with a direct coupled control logic option 04 Option rather than the isolated control logic option the power source output voltage changes as the program pushbuttons are pressed No STROBE is necessary 6 29 Auto Mode 6 30 AUTO mode of operation provides automatic and sequential scanning of a previously selected magnitude program The power source output is thusly stair stepped or pulsed in a manually selected pattern the sequence of which is governed by an internal 10kHz multivibrator The multivibrator also initiates the STROBE pulse for the isolated control logic option If a direct coupled control logic option is used in lieu of the isolated control logic option in the associated power source then the timing of the STROBE is incorrect 6 31 External Mode 632 EXT mode operation is similar to the auto mode of operation The difference is that the internal 10kHz multi vibrator is switched out and an external pulse generator is substituted at the TRIGGER INPUT jack The sequence frequency is thereby remotely controlled by the trigger generator 6 33 Magnitude Program Switches 6 34 Sixteen magnitude program switches provided on the MCU are used to program the BCD or
155. he control strobe pulse to the control word one shot a pulse is generated and fed to the parallel load input of the control word shift register The pulse causes the shift register to load the parallel control word supplied by the program source If the strobe control line directs the control strobe pulse to the data word one shot a pulse is fed to the parallel load input of the data word shift register 609 75 In a device configured for dual strobe operation both the control word strobe and data word 609 20 strobe signals are used to load the program data from the program source In this configuration the control word strobe triggers the control word one shot to load the control word into its shift register and the data word strobe triggers the data word one shot to load the data word Refer also to Figure 609 11 NOTE For single strobe dual strobe and strobe polarity jumpering configurations refer to Figure 609 4 609 76 DATA TRANSFER 609 77 Whenever the control word one shot or data word one shot is triggered the resulting output triggers a first hold one shot Refer also to Figure 609 11 One output of the hold one shot produces a hold pulse which is fed across the guard shield via T2 to trigger a second hold one shot The second hold one shot generates a hold pulse required by the voltage source to hold the output magnitude at the current value while magnitude data is being reprogrammed NOTE The
156. he MCU and power source are tied together for one of three purposes 1 for manual control of the pro gramming inputs to a valid power source 2 for calibration and adjustment of an out of tolerance or repaired power source and 3 for troubleshooting an improperly operating power source In the first two cases when malfunctions are observed in the response of the power source to MCU pro gramming inputs other than obvious mechanical faults on the MCU such as a stuck switch a bent or misaligned pro gramming connector or a servered cable wire all of which are readily identified and repaired isolation of the fault to the MCU is accomplished by disconnecting the MCU at the power source programming connector and connecting another programming source known to be good to the power source In the third case where an MCU is used to troubleshoot an improperly operating power source and the MCU becomes suspect the MCU must be considered de fective and checked separately A troubleshooting proce dural outline is given on the reverse side of the foldout page which faces the schematic diagram of the MCU 6 105 Equipment required for troubleshooting the MCU is a multimeter an oscilloscope and a 7 inch insulated shorting jumper terminated with midget alligator clips Additionally a 5 volt de power supply is required for troubleshooting the MCU when it is disconnected from the power source 6 106 With the interface cable attached and lock
157. he Model number when re questing a new shipping container 2 6 INPUT POWER 2 7 This power source be operated from a 50 to 60 Hz power line ranging from 100 to 250 volts ac A decal on the rear panel indicates the power input limits Specific power line voltages require that slide switches internal of the instrument be set as indicated in Figure 2 1 or on the lower left corner of the guard cover To accommodate the instru ment to the specific power line voltage proceed as follows LINE SWITCH POSITIONS VOLTAGE PWR SPLY H V PWR SUPPLY A2 1 A10 1 A10 2 Figure 2 1 INPUT POWER SWITCHING Determine the ac line voltage and relate its value to the closest value shown in Figure 2 1 Remove the power cord b Remove the top cover of the instrument c Remove the top inner guard cover d Refer to Figure 2 2 and locate the three slide switches in the instrument e Refer to Figure 2 1 and set the three power switch es such that the color dot showing corresponds to the color given for the specific line voltage that was selected in step a f Refer to the decal on the rear panel of the instru ment determine the appropriately rated fuse for the line power selected in step a and install the fuse in the fuse holder 2 1 4270A RED DOT DETAIL WHITE DOT BARRIER STRIP 1 A2 1 POWER SUPPLY SLIDE SWITCH WHITE DOT RED DOT COVERED Figure 2 2 POWER SUPPLY SWIT
158. his status line does not need to be polled 30 24 Single line which provides Vcc to the staus logic on the 4200 09 This is necessary in order to obtain polled power off status when power is off Current requirement is 2 per power source 16 25 Ready flag Single line which provides a Logic O for a fixed time period after receipt of a strobe signal The time period is equal to worst case settling time after the voltage source is programmed to a new output level NOTE Current Limit Power Off Abnormal Status and Ready Flags require program source pull up resistors to reach Logic 1 state 609 4 4 79 4200 09 Table 609 2 Input Output Signals BCD Program Source PIN NUMBER SIGNAL NAME DESCRIPTION 50 PIN A CONN CONN Logic 1 0 to 0 4V Logic 0 2 4 to 5V 43 44 19 T S R Voltage output Four BCD lines to program the most significant digit of amp 42 amp P magnitude MDS the output voltage All 16 Magnitude Bits Logic 1 bit true Logic O 7 bit false 38 8 L Voltage output Four BCD lines to program the second most significant 25 amp 24 amp K magnitude 250 digit of the output voltage 39 40 J Voltage output Four BCD lines to program the third most significant 11410 amp E magnitude 3SD digit of the output voltage 13 15 D C B Voltage output Four BCD lines to program the least significant digit of 12 amp 14 amp A
159. iers between guard transformers and shift registers inside guard 17 Does parallel data appear at outputs of shift registers inside the guard 19 18 18 Check shift registers inside the guard 19 Perform the Voltage Source troubleshooting procedure in the applicable Voltage Source Instruction Manual 4 79 609 25 4200 09 609 26 Table 609 6 Troubleshooting Chart Data Errors at Parallel Outputs ACTION Is program data correct at parallel input shift registers Check the program data source 15 serial data correct at output of the shift registers 15 program data shifted on position to the left or right Check appropriate input shift register Check the divide by 16 counter Check the serial inputs and parallel outputs of the shift registers inside the guard Go to the step number given for correct response Table 609 7 Troubleshooting Chart No Binary Data Complementing ACTION Does polarity storage flip fiop output change states between positive and negative data Do polarity storage flip flop inputs change states between positive and negative data Check the polarity input line and inverters Does the polarity storage flip flop receive a clock pulse Check ail strobe input logic elements Replace the polarity storage flip flop Does the complement flip flop change states after the first true data bit Replace the complement flip flop Check gates of the inverting and complemented da
160. imiting at less than 0 6A is also possible using the A8 Programmable Current Limiter 06 Option described later Clamp circuits in the A9 Power Amplifier limit voltage transients at the output during a current limit condition when the load is discon nected 3 13 Current limiting at less than 0 6A is provided upon installation of the A8 Programmable Current Limiter 06 j Option Maximum bipolar output current can be limited to level between 10 ma and 0 55 ampere in 10 percent steps on two separate reanges In the event the output current is clamped at that level by action of the A8 Programmable Cur rent Limiter During periods of current limiting an I LIMIT command is generated in the A9 Power Amplifier and is applied to the A6 Control Logic and to the A7 Front Panel The I LIMIT command applied to the A6 Control Logic pro duces a CURRENT LIMIT FLAG at pin 49 of the Programm ing Connector The I LIMIT command applied to the A7 Front Panel illuminates the I LIMIT indicator on the front panel 3 14 CIRCUIT DESCRIPTIONS 3 15 following paragraphs describe the circuitry in the power source Each description is keyed to a schematic diagram located at the rear of the manual 3 16 A1 Mother Board and A7 BCD Display 4270A 1011 3 17 Al Mother Board serves to interconnect the 2 through A9 assemblies No component circuitry other than connectors and amp pins are contained on this assembly The A
161. inal Zero Adjustment 429 Output Checks 5 LISTS OF REPLACEABLE PARTS 5 1 INTRODUCTION 54 HOW TO OBTAIN PARTS 6 OPTIONS AND ACCESSORIES 6 1 INTRODUCTION 6 3 OPTION INFORMATION 6 5 ACCESSORY INFORMATION Option 07 100 uV Resolution Schematic Diagram 4210A 1032 Option 09 Multi Strobe Isolated Logic Schematic Diagram Model 44200 Manual Control Unit Schematic Diagram A4200 1000 Rack Mounting Fixtures Programming Connector Extender PCB Assembly and Cable Extender Assembly 7 GENERAL INFORMATION 8 SCHEMATIC DIAGRAMS PAGE 43 47 5 1 52 5 2 6 1 6 1 6 1 6 1 4270A List of Illustrations FIGURE TITLE PAGE 11 OullineDrawing lt oaoa A 14 12 Programming Connector Pin Assignments 1 5 24 Input Power Switching fa Sa ny tee WR ER ad uo 2 1 2 2 Power Supply Switch Location 2 2 2 3 Accessory Rack Mounting Kits 22 24 Front Panel Operating Features 23 2 5 Rear Panel Operating Features 2 3 2 6 Remote SensingConnections a a a s s s s 0 2 24 2 7 Guarded Load Connection giu tegi Vee oa 2 5 2 8 Isolated Control Logic Timing 01 un V IA a anes Bg 27 2 9 Accuracy Versus External Reference Frequency cu 2 8 2 10 AC External Reference Feedthrough Versus Frequency wale 8 29 2 11 AC External Reference Phase
162. inal barrier strip located on the rear panel serves as an analog input output connector for the power source The power output terminals OUTPUT HI and LO provide connection to load The term inals SENSE HI and LO are provided to allow remote sensing at the load The sense terminals are bussed through jumpers installed at the factory to the output terminals If remote sensing is not required the load is connected to the respective output terminals and the sensing busses are not removed If remote sensing is required the busses must be removed and separate sense lines provided between the sense terminals and load In either case NEVER operate the power source with the sense terminals disconnected The CHASSIS terminal is connected directly to the chassis and allows grounding of the load through the input power cord if desired The GUARD terminal allows load connections that can greatly reduce errors caused by common mode sig nals This guard connection should always be used if opti mum noise free performance is to be achieved 2 18 Remote Sensing 2 19 When load is connected to the OUTPUT termin als the I R drop across the output power leads may be ex cessive in some applications If the rated accuracy of the power supply is required at the load remote sensing must be used For this reason SENSE HI and SENSE LO terminals are provided to allow the power supply output to be sensed directly at the load th
163. inframe address bit for each voltage source being addressed is also required but the address bits are not part of either the data word or control word The address bit must be true for the source being addressed during both data word and control word loading In the standard BCD format 18 bit data word and 6 bit control word the standby operate bit is not part of either word Instead a bit must be supplied for each voltage source because the jumpers are configured for asynchronous standby operate transfer Synchronous transfer is possible in the standard format but polarity control must be sacrificed Refer to Figure 609 6 609 27 optional BCD format using a 16 bit data word and an 8 bit control word is possible refer to Figure 609 6 The data word consists of the 16 bits of BCD magnitude programming The first control word bit is polarity or standby operate the second bit selects the output range the third bit is the external reference command the fourth bit is the current limit range and the fifth through eighth bits are current limit magnitudes This format is obtained by jumpering pad T to pad U 609 28 BCD LOGIC SENSE 609 29 Both the BCD data word and control word may be either positive true logic or negative true logic Data word 16 or 18 bits logic sense is determined by jumpering between pads J K L M V and W Pad V must be jumpered to pad W for either BCD logic sense The standard configuration is negati
164. input 609 87 NOT READY SIGNAL 609 88 A Not Ready signal is initiated when a strobe signal initiates data transfer Strobe signal gating circuitry triggers either the Control Word One Shot or the Data Word One Shot They in turn trigger the First Hold One Shot The First Hold One Shot triggers the Data Transfer Flip Flop and the Not Ready One Shot The Not Ready One Shot pulse is present through the data transfer time and lasts until the voltage source settles at its newly programmed output Not Ready pulse duration is dependent on component selection 609 89 Resistive and capacitive components in the Not Ready One Shot circuit are selectable to establish different one shot signal durations A fixed time period is established by component selection with pad M jumpered directly to pad L A variable time period is possible if a potentiometer is installed between pad M and pad L in place of the jumper Refer to Figure 609 4 609 21 4200 09 SERIAL DATA WORD OUT SHIFT REGISTER INVERTING LOGIC U14 ENABLE SERIAL DATA IN DATAWORD TO U5 U8 SUCCEEDING ARALLEL gt COMPLEMENT LOAD 4200 FLIP FLOP SERIAL CONTROL U15 CLOCK SHIFT WORD OUT PULSES REGISTER NE CORTROL V PARALLEL SS nire DATA IN CARRY 16 OUT COUNTER 912 DATA PARALLEL LOAD TRANSFER CONTROL WORD U2 U3 U4 96 TO SUCCEEDING 4200
165. instrument in accordance with Oper ating Instructions paragraphs 2 6 and 2 7 Depress the MANUAL button on the MCU and release all other buttons that may be depressed NOTE In an instrument containing Inverted Isolated Control Logic PCB 08 Option all instructions reading depress shall mean release and all instructions reading release shall mean depress This note however is not applicable to EXT REF STANDBY STROBE MANUAL AUTO or EXT functions d Depress the STROBE button on the MCU 0 volt positive low range and allow the instrument to warm up for one half hour 4 20 Power Amplifier Bias Adjustment a Remove the top dust cover Depress RANGE and STROBE buttons to call a OV output high range 4270 Check that the 110 VOLT RANGE indicator illuminates NOTE If the A8 Current Limiter PCB is installed 06 Option depress the following buttons for a cur rent limit condition of 0 55 amperes X10 80 20 10 and STROBE Check that these indicators illuminate CURRENT LIMIT MA X10 40 and 5 Remove the guard cover and connect a dc voltmeter to A9TP4 and A9TP6 See Figure 4 1 for location of test points Adjust P A BIAS as necessary to obtain a meter reading in the range of 70mV to 278mVdc Disconnect the voltmeter from A9TP4 and A9TP6 Bit Adjustment 0 4 Connect a dc voltmeter to the OUTPUT HI and LO terminals on the rear panel barrier strip Connect an in
166. ion of the program data Refer also to Single Strobe Operation Logic 1 transfers the control word Logic O trans fers the data word 26 Polarity Sign Single line to program output polarity Logic 1 for negative output Logic 0 for positive output 1 27 Output magnitude Single line to program output magnitude range on those range voltage sources requiring range selection Logic 1 high range Logic 0 low range 31 E External reference Single line to program external reference mode on those voltage sources equipped with the external reference option Logic 1 ext reference Logic 0 int reference 2 28 Current limit range Single line to program range of current output limiting on those voltage sources equipped current limit selection Logic 1 1 amp range Logic 0 100 mA range 37 35 5 14 3 2 Current limit Four lines to select the current limit value expressed as a amp 3 amp 1 magnitude percentage of the programmed ranges Up to 120 can be programmed Any attempt to program 0 results in 1096 Logic 1 bit true Logic 0 bit false 17 U Standby Operate Single line used to select the standby or operate mode of address zero the voltage source Logic 1 programs Standby Logic 0 programs operate 23 22 34 V W X Standby Operate Seven lines through connections used to select the standby 32 7 6 YZ A addresses one or operate mode of up to seven succeeding voltage sources 4 through seven 20 12 instrument mainf
167. ipped with a guard shield that isolates its internal circuitry from the chassis and ground A GUARD terminal at the rear panel is connected to this shield and allows load connections that greatly reduce errors caused by common mode signals The guard may be driven to a maximum of 1000 volts above chassis ground Figure 2 7 Shows a simplified diagram of a guarded load connection 2 24 PROGRAMMING INFORMATION 2 25 All instrument functions with the exception of power switching and control are controlled via a mating pair of 50 Amphenol connectors located on the instru ment rear panel The female Amphenol connector is rigidly attached to the rear panel and a mating male connector less cabling is supplied with each instrument as a separate access ory These Amphenol connectors establish the interface between the instrument and the programming equipment Cabling is to be provided by the instrument user who determines pin utilization and cable length to satisfy his individual requirements The instrument is powered v a a rear panel toggle switch and not through the programming connector Table 2 1 is a tabular listing that functionally describes each connector pin Cable connector assembly data is given in Section 6 Accessory Programming Connec tor 2 26 Programming input requirements are compatible with either DTL or TTL logic levels Logic 0 is 2 0 to 5 0Vdc or open circuit to logic ground Logic 1 is 0 to 0 AV
168. ither the manual strobe generator or the auto strobe generator is defective To check the auto strobe generator remove the previously attached shorting jumper and attach it between test points 1 and 2 Check for previously defined output pulse s from TRIGGER OUTPUT jack JS If pulses are present manual strobe generator is defective If pulses abseni integrated circuit inverter U1B which is part of the auto strobe generator is defective AUTO STROBE GENERATOR AND AUTO SWITCH The previous paragraph defined the procedures for checking part of the autostrobe generator that is com mon to the manual strobe generator This paragraph gives the procedure for checking that portion of the auto strobe generator upstream of inverter U1B as well Set up the scope as defined in first two sentences of the previous paragraph Remove shorting jumper from test points 1 and 2 if previously attached De press and latch AUTO pushbutton on top panel of MCU Check for repeated pulses as defined above If pulses are present the circuitry from the 10kHz multivibrator to AUTO switch to auto strobe genera tor to output at pin 33 is valid If pulses are not pre sent determine from a previous paragraph that 10kHz multivibrator is valid and then apply the shorting jumper between test points 1 and 2 If pulses are present the AUTO switch is defective If pulses are absent the auto strobe generator is defective To de termine which pulse forming stage in the p
169. its in the equipment rack proceed as follows Ensure that the power cord of each instrument is disconnected from line power b Peel the front and rear side panel decals from each instrument c Select one instrument and remove the top and bottom dust covers d Remove the guard cover e Remove the three screws from the front side panel that will mate to the other instrument i Pull the front panel forward slightly and then thread the 58 32 fasteners into the P nuts shown in Figure 6 3 z Push the front panel into position making sure that each PCB is correctly mated into the mother 6 2 board PCB and then install the three screws in the front side panel h Thread the 48 32 fasteners into the P nuts located on the inner rear side panel that will mate to the other instrument 1 Bolt the two instruments together as shown in Figure 6 3 j Install the guard cover removed in step d k Remove the feet from the bottom dust cover of each instrument 1 Install the top and bottom dust covers removed in step b m Install the mounting brackets shown in Figure 6 2 on the outer front side panels Use the 8 32 x 1 2 PHP screws provided in the kit n Slide the two instruments into the equipment rack and secure them in place with fasteners through the mounting brackets NOTE Refer to paragraph 6 8 for chassis slide installa tion Connect the power cords to line power 6 8 Chassis Slide install
170. ive comparator is de scribed The output current from the Model 4275A flows through a one ohm resistor R51 A positive output current through this resistor produces a positive voltage that is compared to the output of U3 by action of transistor 017 3 11 4270A When the positive output of U3 is greater than the positive voltage developed across R51 Q17B is on and Q174 is off as are 018 019 and 017 This corresponds to the Model 4275 output current being less than the programmed I limit When the positive output of U3 is less than the posi tive voltage developed across R51 Q17A 018 019 and 027 are all on and conducting The greater the difference between the R51 and U3 voltages the greater these tran sistors conduct The collector of Q27 connects by way of pin 2 of P1 to the base of Q31 on the A9 Power Amp lifier When the Q27 collector conducts it shunts base current drive away from 031 limiting the 4275 output cur rent to the programmed level Transistors Q18 and Q27 are common base stages used as voltage translators Q18 from the 10 volts level of Q17A to 019 which is referred to Vy about 100 volts and Q27 from Q19 are essentially the OUTPUT HIGH terminal voltage Transistor Q19 provides current gain and Q20 is used as a temperature compensating diode for Q19 Capacitor C4 and resistor R40 are the primary frequency response determining components Transistor Q25A and Q25B compares a negative reference volta
171. k Matched Resistor Set Res ww 108k Res var cermet 502 10 1 2w Res met flm 60 49 1 1 8w Res ww 24 987k 0 03 1 4w Res ww 50k 40 03 1 4w Res met flm 100 03k 0 1 1 8w Res met flm 200 68k 0 1 1 8w Res met flm 108 06k 0 1 1 8w Res met flm 49 9k 0 1 1 8w Res met flm 24 9k 0 1 1 8w Res met flm 100k 0 5 1 8w Res met flm 200k 1 1 8w Res 1 8k 595 1 4w Res cmpsn 5602 5 1 4w Res cmpsn 20k 5 1 4w Res 51k 5 1 4w 289827 285122 235366 289769 289777 291088 290122 290114 291070 290106 291054 261701 175042 147991 221614 193334 1 20 78 4200 SERIES OPTION 07 R USE R100 R103 R105 R106 R109 R111 R112 R115 R117 R118 R21 R22 R23 R26 R29 R32 R35 R38 R41 R44 R47 R50 R107 R110 R113 R116 R123 1 20 75 Res cmpsn 51k 4595 1 4w Not used Res cmpsn 2 7k 5 1 4w Res met fim 120k 1 1 8w 193334 48 170720 32 1 6 7 6 8 x VR VREF Va COMMON COMMON ist DECADE REF COMMON DRIVER DESIG 2 7K SUPPLY RB 560 i x RC 51K RD 27K RE 51K 100K8 RF c QA 2N3906 3 Qb 02366 01994 1 243904 2 ap U2366E U1994E8 20 LADDER y Ri R13 2
172. ll times 609 42 Standard Binary configuration uses a positive true control word and a positive true Standby command Standby 5V Operate OV Positive true Standby requires a jumper from pad 16 to pad 19 If a positive true Operate command is required jumper pad 16 to pad 18 However if a negative true control word is in use pad N jumpered to pad P then a positive Standby command requires a jumper from pad 16 to pad 18 Operate positive true commands require a jumper from pad 16 to pad 19 with a negative true control word 609 43 Standard BCD configuration uses an asynchronous Standby Operate command so control word logic sense is irrelevant Operate positive true commands require a jumper from pad 18 to pad 20 Standby positive true commands require a jumper from pad 19 to pad 20 Either Standby Operate logic sense requires a jumper from pad C to pad D 609 16 609 44 CONTROL AND DATA WORD STROBE SIGNALS 609 45 The 4200 09 can program output voltages in both Single Strobe and Dual Strobe modes Standard Binary voltage source configurations operate in the Single Strobe mode Standard BCD voltage source configurations operate in the Dual Strobe mode Single Strobe operation employs one Strobe Pulse line but two Strobe Pulses The condition of the Strobe Control line true or false determines whether a Strobe Pulse loads the control word orthe data word Dual Strobe operation employs two Strobe Pulse lines and two Strobe
173. ltage patterns available by programming a single decade in the 4210A the 4250A or the 4270A power source 6 35 Polarity or Sign Polarity 6 36 polarity program for the power sources is con trolled by the program switch marked POL or SIGN POL Depressing this switch commands the negative programmed output voltage The non depressed or ouf position com mands the positive programmed output voltage 6 37 External Reference 6 38 The EXT REF switch when depressed programs the External Reference Option 03 Option of the 4200A series power sources 6 39 Standby TABLE 6 1 A4200 MCU 640 The STANDBY switch when depressed programs the 4200A series power sources to the standby condition This condition permits a single bit on a given control line to clear the output to about 1 percent of the programmed level without disturbing the previous command word Upon returning to the operational condition by releasing the STANDBY pushbutton the output reverts to the pre programmed level 6 41 Range 642 When the RANGE switch is depressed the high range of the associated power source is programmed When not depressed and in the out position the RANGE switch programs the low range of the power source The low and high ranges of the 4200A series power sources are given in Table 6 2 6 43 Current Limit 6 44 five CURRENT LIMIT MA switches labeled in black or in black and red numbers depending upon serial No effec
174. luke Mfg Co Inc P O Box 43210 dependent on the malfunction symptom The preceding Mountlake Terrace WA 98043 telephone theory of operation should be read and understood prior 206 774 2211 Send all orders or inquiries to to troubleshooting the attention of the Parts Department NOTE Manager Place 4200 09 pcb assembly on an extender 609 97 The 4200 09 requires no adjustment either card Fluke part number 292263 for access periodically or after repair during troubleshooting Table 609 5 Troubleshooting Chart Inactive Module Go to the step number given for correct response STEP NO ACTION Does Control or Data Word One Shot fire when strobed 15 the strobe pulse gt 1 us 3 Check strobe pulse source Check logic elements preceding one shot Does First Hoid One Shot fire 6 6 Repair First Hold One Shot circuit 7 Does Data Transfer Flip Flop pin 6 go to Logic 0 1 6 us 9 8 8 Check logic elements between First Hold One Shot and Data Transfer Flip Flop 9 15 clock generating 10 MHz 11 10 10 Check and repair clock circuit 11 Are clock pulses present at pin 8 of the shift register inside the guard 13 12 12 Check all elements between clock circuit and shift registers 13 5 serial data present at guard transformers 15 14 14 Check input shift registers and logic elements 15 15 serial data present at shift registers inside the guard 17 16 16 Check transistors and amplif
175. m 203323 DHD1105 Not used Diode zener 6 8V 260695 Not Used Diode Si 1 amp 600 piv 112383 1N4822 Not Used Diode FET 334714 TCR 5315 Xstr Si PNP 276899 255415 Xstr Si NPN 335067 2N3439 5 35 POWER AMPLIFIER ASSEMBLY Cont MFG PART NO TOT REC USE DESCRIPTION OR OTY OTYiCDE Xstr Si NPN 218511 Xstr Si PNP 284448 2N5416 Xstr Si PNP 195974 2N3906 Xstr Si NPN 218396 2N3904 Not used Xstr Si NPN 190710 2N3739 Xstr Si NPN power on Heatsink 313213 2N5240 Not used Xstr Si PNP power 9 2N5345 Not used Res comp 2k 5 202879 CB2025 Res comp 20k 5 221614 CB2035 Res comp 62k 5 220053 CB6235 Res comp 270 5 160804 CB2715 DESCRIPTION Res met flm 4 12k 1 1 8W Res comp 1k 5 4W Res comp 100 5 Res comp 250k 5 Res comp 330k 5 Res comp 62k 5 4W Res comp 10k 5 Res met flm 10k 1 1 8W Res met flm 6 04k 1 1 8W Res met flm 15 8k 1 1 8W Res comp 7 5k 5 Res comp 130k 5 Res comp 180 5 W Res comp 33k 5 1W Not Used Res comp 100k 5 W Res comp 68 5 Res comp 1 5 W Res met flm 23 7k 1 1W Res met flm 127 1 1 81 Res comp 1 1 5 W Not used Res comp 51 5 235341 148023 147926 218016 192948 221911 148106 168260 285189 293688 193326 108852 147942 109538 148189 1479
176. magnitude LSD the output voltage 26 Polarity Sign Single line to program output polarity Logic 1 programs negative output Logic 0 programs positive output 1 27 Output Magnitude Single line to program output magnitude range on those range voltage sources requiring range selection Logic 1 high range Logic 0 low range 31 External reference Single line to program external reference mode on those voltage sources equipped with the external reference option Logic 1 ext reference Logic 0 int reference 2 28 Current limit range Single line to program range of current output limiting on those voltage sources equipped current limit selection Logic 1 range Logic 0 100 mA range 37 35 4 3 Current limit Four lines to select the current limit value expressed as a 5 amp 3 2 amp 1 magnitude percentage of the programmed range Up to 12096 can be programmed Any attempt to program 0 results in 1096 Logic 1 bit true Logic O bit false 17 U Standby Operate Single line used to select the standby or operate mode of address zero the voltage source Logic 1 programs standby Logic 0 programs operate 23 22 34 V W X Standby Operate Seven lines through connections used to select the 32 7 6 Y Z A addresses one standby or operate mode of up to seven succeeding voltage amp 4 through seven sources 20 12 Instrument mainframe Single line used to address the voltage source in order to address zero per
177. magnitude programming The Sth bit is strobe control the 16th bit is polarity programming The first control word bit is standby operate and the second control word bit is output range programming If the voltage source is equipped for external reference and selectable current limiting six control word bits are required for those functions The third control word bit would select the external reference mode the fourth bit would select the current limit range The remaining four bits would determine current limit magnitude Eight remaining control word bits are address lines used to select one voltage source in a multiple source system for programming 4 79 4200 09 Table 609 1 Input Output Signals Binary Program Source PIN NUMBER SIGNAL NAME DESCRIPTION Logic 1 2 4V to 5 0V Logic 0 0 to 0 4V 50 PIN 56 PIN CONN CONN gt _ 42 19 44 P R S T Voltage output Fourteen lines used to program the output voltage with a 43 24 25 K L M N magnitude binary word The least significant bit pins 12 and B is 8 38 10 J 2 the most significant bit pins 42 and P is 213 Logic 11 40 39 1 bit true Logic 0 bit false 14 amp 12 13 D trobe Control Single line used to steer the contro strobe signal to transfer either the control word portion of the program data or the data port
178. ment the polarity bit one additional jumper is required to assure this 609 21 The polarity bit may be either the last 16th bit in the data word or the first bit in the control word If it is the last bit in the data word as shown in Figure 609 3 jumper pad A to pad B If polarity is indicated by a bit within the control word the entire data word can be complemented Jumper pad A to pad C to accomplish this 609 22 When used a 4275A Voltage Source the standard 4200 09 Option jumper configuration includes pad F to pad 27 pad G to pad H and pad 26to pad 28 The standard Binary data format may be used but the two 4275 least significant bits of magnitude the 1 bit and 5 bit will not be programmed Only 14 magnitude bits will be programmed with the polarity programming in place of the I bit and the 5 bit unprogrammable An optional jumper configuration is possible if the polarity bit is placed in the control word By jumpering pad H to pad F and removing the jumpers between pads H and G 4200 09 and between pads F and 27 the 4275A 1 bit may be programmed No jumper configuration will allow the 5 bit to be programmed 609 23 BCD Program Operation 609 24 BCD FORMAT 609 25 The standard program data format for BCD type 4200 Voltage Sources consists of an 18 bit data word and a control word of 6 bits referto Figure 609 5 In the standard BCD format the first four data bits program the most signi
179. ming equipment Diode bridge CR19 rectifies the secondary voltage of T1 and supplies the series regulator of Q21 through Q24 with a dc voltage C16 filters the voltage applied to the regulator Q22 functions as a constant current source supplying base drive to Q23 The resulting 5V output of the regulator is developed across CR23 and R54 which supplies a sample of the output voltage to the base of Q24 The conduction of 024 will limit the base drive to Q21 and Q23 producing regulated 5 output This supply is completely isolated from all other supplies in the instrument and is electrically external of the guard All other supplies are electrically inside the guard 324 SUPPLY 3 25 V Supply composed of CR14 and 016 through 018 produces the regulated 5V dc required to operate the internal logic circuits Diode bridge CR14 rec tifies the secondary voltage of T1 and supplies the series regulator of 016 through Q18 with a dc voltage C13 filters the rectified voltage The base drive for 018 and 017 is derived from the V Supply through R44 Reference volt age for the base of Q18 is derived from the V A Supply through the divider consisting of R46 and R47 Any varia tion in the 5V output is then sensed by Q18 which controls the base drive to 17 and thus 016 producing a regulated 5V dc output 3 26 V SUPPLY 3 27 The VA Supply produces the regulated 23 4 and 25 1V de operating voltages that are use
180. ms the Positive Constant Current Source The Negative Constant Current Source consists of Q38 The positive and negative constant current sources produce constant reference current for the bases of Q31 and 037 respectively 3 120 OUTPUT STAGE 3 121 The Output Stage consisting of Q31 through Q35 and Q37 through Q42 produces the power source output It also provides both sourcing and sinking current limit protection 3 122 Transistors Q31 through Q33 and Q37 Q41 Q42 form a complementary emitter follower stage Q31 through Q33 produce the positive output and Q37 Q41 Q42 the negative Total output current flows through R43 R44 positive and R47 R48 negative 3 123 Both sourcing and sinking current limit protection is provided for each section of the output amplifier Q34 protects the positive output section and Q35 the negative Maximum output current sourcing is limited to 1 2A Sink ing current is limited at a lesser value depending on the pro grammed output voltage Since operation of each current limiter is the same only the positive output section pro tected by Q34 is described 3 124 Output current passes through R43 This current produces a bias voltage for A34 When the output current sourcing exceeds 0 6A the resulting potential turns on Q34 Conduction of Q34 via CR34 shunts any further base drive current to Q31 thus limiting the maximum sourcing 4270A output current at 0 6A In the sinking mode o
181. nc Manhasset New York 97540 Master Mobile Mounts Div of Whitehall Electronics Corp Ft Meyers Florida 97913 Industrial Electronic Hardware Corp New York New York 97945 Penwait Corp SS White Industrial Products Div Piscataway New Jersey 97966 Replaced by 11358 98094 Replaced by 49956 98159 Rubber Teck Inc Gardena California 98278 Maico A Microdot Co Inc Connector amp Cable Div Pasadena California 98291 Sealectro Corp Mamaroneck New York 98388 Royal Industries Products Div San Diego California 98743 Replaced by 12749 98925 Replaced by 14433 99120 Plastic Capacitors Inc Chicago Illinois 99217 Bell Industries Elect Comp Div formerly Southern Elect Div Burbank California 99392 STM Oakland California 99515 ITT Jennings Monrovia Plant Div of ITT Jennings formerly Marshall Industries Capacitor Div Monrovia California 99778 Use 29587 Bunker Ramo Corp Barnes Div Landsdowne Pennsylvania 99800 American Precision industries Inc Delevan Division East Aurora New York 99942 Centrelab Semiconductor Centreiab Electronics Div of Globe Union Inc Ei Monte California Toyo Electronics R Ohm Corp Irvine California National Connector Minneapolis Minnesota 7 7 7 8 U S SALES AREAS for all Fluke products AL Huntsville John Fiuke Mfg Co Inc 3322 5 Memorial Parkway Suite 96 Huntsville AL 358
182. nections 2 24 PROGRAMMING INFORMATION 2 27 Standby 2 29 Range Output Magnitude Polariy 2 33 Data Strobe 2 35 Flag Outputs 2 38 Programmable Current Limiting 2 41 External Reference 245 Front Panel Indicators 2 47 Dynamic Characteristics 3 THEORY OF OPERATION 34 INTRODUCTION 3 3 FUNDAMENTAL CIRCUIT DESCRIPT ION 3 5 BLOCK DIAGRAM ANALYSIS 3 14 CIRCUIT DESCRIPTIONS 3 16 AI Mother Board and A7 BCD Display 42704 101 n gt 3 18 A2 Power Supply and 10 Connector Board 1061 4270 Table of Contents and 4270A 1012 PAGE 1 1 1 1 1 3 28 2 8 3 1 3 1 3 1 3 1 3 3 3 3 3 3 continued on page ii 4270A TABLE OF CONTENTS continued SECTION TITLE 340 Preamplifier 42754 1051 3 58 A4 External Reference 4250A 1041 3 66 AS BCD Ladder 42104 1031 3 74 A6 Isolated Control Logic 4275 A 1021 3 91 Programmable Current Limiter 42704 1081 3 109 A9 Power Amplifier 4270A 1071 4 MAINTENANCE 4 1 INTRODUCTION 4 3 SERVICE INFORMATION 4 6 GENERAL MAINTENANCE 4 7 Cleaning 4 9 Air Filter Cleaning 441 Fuse Replacement 4 13 MAINTENANCE 4 15 INVERTED CONTROL LOGIC 4 17 CALIBRATION 4 19 Initial Procedure 4 20 Power Amplifier Bias 4 21 Bit Adjustment 0 4 4 22 Zero Reference and Bit Adjustment 4 23 External Reference Adjustment 03 Option 4 25 Current Limiter Adjustment 06 Option 427 F
183. ng as the 1MHz pulses occur the output ofthe re triggerable one shot is held at dc level which becomes the current limit flag to the program source 3 91 Programmable Current Limiter 42704 1081 3 92 A8 Programmable Current Limiter is installed as the 06 Option It compares the voltage from a ladder network to an input voltage proportional to the output current When the output current exceeds the ladder net work reference a clamp signal is produced that is used to limit the output current of the A9 Power Amplifier The A8 Programmable Current Limiter contains the following circuitry an 8 4 2 1 to 44 2 1 binary code converter FET drivers a ladder voltage reference ladder switches and a adder a programmable reference and programmer reference inverter and two current limit comparators one positive and the other negative Auxiliary circuits are a ground iso ator and two power supplies one 15 volts and the other 16 volts A two ohm current sampling resistor is tied to he input of the two current limit comparators 3 93 8 4 2 1 to 4 4 2 1 CONVERTER 3 94 This logic converter consists of two digital inte grated circuit hex inverters U1A through U1F and U2A through U2F They convert the input 8 4 2 1 code to 4 4 2 1 code and in the absence of any programmed inputs pro gram the ladder to the lowest current limit 10 milliamps This is the quiescent state of the limiter in which ladder Swtich Q4 and the cur
184. ntrol an associated programmable power source These switching circuits permit manual control of the power source output voltage as well as an automatically triggered repetitive and manually variable program for controlling the power source output voltage The MCU is also provided with input output circuits that with the aid of a supple mental scope permit the visual presentation of the ready or not ready status of the power source the trigger output signal and a means of connecting an external trigger 6 48 649 The A4200 MCU contains manually controlled 6 50 General 6 51 Block Diagram Analysis A simplified block diagram of the MCU is shown jn Figure 6 5 The primary function of the MCU is to pro 67 A4200 MCU 21501 SALON Ov23IdA4 SHOJO3NNOO TlON3HdWV I 398 08 S39V110A i H3MOd 1108110 7 1 AN3MdIfIO3 OL iM lt 318v3 Ovid AQv3u 9r 8399181 SP YOLOANNOD 1 1 SIHOLIMS poo 9 01 01 02 02 0 0 08 333 25899 AS8QNVIS 25 39NVH 15 115 IOd NDIS S3HOLIMS V YALNNOD ASVNIG e Lig unod 8 en 1050 HOIVHBIA LOA
185. o Circuits Div Slatersville Rhode Island 27014 National Semiconductor Corp Santa Clara California 27264 Molex Products Downers Grove Illinois 28213 Minnesota Mining amp Mfg Co Consumer Products Div St Paul Minnesota 28425 Serv Link formerly Bohannan industries Fort Worth Texas 28478 Deitroi Controls Div Deitrol Corporation Milwaukee Wisconsin 28480 Hewlett Packard Co Corporate HQ Palo Alto California 28520 Heyman Mfg Co Kenilworth New Jersey 29083 Monsanto Co Inc Santa Clara California 29604 Stackpole Components Co Raleigh North Carolina 30148 AB Enterprise Inc Ahoskie North Carolina 30323 Illinois Tool Works Inc Chicago Illinois 31091 Optimax Inc Colmar Pennsylvania 32539 Mura Corp Great Neck New York 32767 Griffith Plastic Corp Burlingame California 32879 Advanced Mechanical Components Northridge California 32897 Erie Technological Products Inc Frequency Control Div Carlisle Pennsylvania 32997 Bourns inc Trimpot Products Division Riverside California 33173 General Electric Co Products Dept Owensboro Kentucky 34333 Silicon General Westminister California 34335 Advanced Micro Devices Sunnyvale California 34802 Electromotive Inc Kenilworth New Jersey 37942 P R Mallory amp Co Inc Indianapolis Indiana 42498 National Radio Melrose Massachusetts 43543 Nytronics Inc Transfo
186. off Q30 through Q32 With Q31 and Q32 off only R35 and R36 are con nected to the power source output HIGH SENSE thus in creasing the total feedback resistance by four The result ing output voltage is subsequently four times the binary input commands By connecting the MSB jumpers across R36 and R39 alters the feedback such that only output volt ages corresponding to the most significant bit appear at the output With Q30 off in the 100V range R33 C1 and R34 C2 are connected in series to establish the desired frequency response 42704 3 51 HIGH IMPEDANCE INPUT STAGE 3 52 Differential amplifier Q18 amplifies the Binary Ladder output with respect to analog common V com mon such that feedback through resistance selected by the Voltage Range Switches produces a virtual analog common at the input of Q18A Transistor Q19 functions as a con stant current source and Q20 provides temperature compen sation Variable resistor R61 provides adjustment to com pensate for the input offset of Q18 Jumper selection of R57 through 59 and R62 provides coarse offset adjutment Selection of Rp and Ry in the drain circuit of Q18 is done to provide a low temperature coefficient of input offset voltage Diodes CR7 through CR12 limit the maximum voltage swing applied to the following stage 3 53 SAMPLE AND HOLD 3 54 Sample and Hold circuitry consists of MOSFET gates Q21 Q22 driver Q23 and capacitors C10 and C11 These capacitors
187. ogic 0 pulse at the input of inverter amp UIB Pulse processing through the two inverters U1B and UIA is the same as described in the previous paragraph 6 72 FUNCTION PROGRAM SWITCHES 6 73 function program switches consist of nine spot push push switches with one exception the mo mentary contact STROBE switch S9 on the A3 Function Assembly S1 through S9 The arms of these switches are wired directly to their corresponding pins on the J1 pro gramming connector These switches are independent and are not controlled by any other switches or any other cir cuitry with the exception of the 5 volt Ins line which is paralleled to the normally closed contacts of switches S1 A4200 MCU through S8 Switch S9 is the opposite configuration with the 5 volt bus line tied to the normally open momentary contact Switches S1 through S8 when depressed latch to logic 0 6 74 READY FLAG 6 75 Ready flag connector J6 mounted on the MCU top panel produces an output of 5Vdc to indicate that the related power source is ready to accept programming inputs or produces 0 volt output to indicate that the power source is not ready to accept programming inputs This output jack is tied directly to the power source through the inter face cable and programming connectors on Pin 37 6 76 LIMIT FLAG 6 77 Limit flag indicator CR1 mounted on the MCU top panel is a red light emitting diode It illuminates when forward biased by a logic
188. onditions maintains a high logic state at one input of an AND circuit The poll status signal at the other 609 24 input is ground level so no output is produces H should fail then low logic levels will be present at both inputs and the Power Fail flag will respond with a low logic output The Abnormal Status line will also respond with low logic out 609 94 MAINTENANCE WARNING THESE SERVICING INSTRUCTIONS ARE FOR USE BY QUALIFIED PERSONNEL ONLY TO AVOID ELECTRIC SHOCK DO NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN THE OPERATING INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO 609 95 Performance Test 609 96 Proper 4200 09 operation is best verified in a normal operating environment With the 4200 09 installed in a voltage source and connected to a program Source diagnostic routines may be used or manually entered statements from an operator interface mav be employed to test performance The specific procedure wii necessarily vary with each system 4 79 4200 09 NOTE 609 98 Troubleshooting Procedures A manual test fixture Fluke part number 609 99 Troubleshooting information is presented in six A4209 may be used in conjunction with an separate tables The first table Table 609 5 is an overall A4200 manual control unit for test purposes Malfunction Isolation Procedure each of the remaining It is available from the Parts Department five tables provides troubleshooting procedures John F
189. one voltage indicates that inverter U2 is probably defective Failure to read all voltages in dicates that the four bit binary counter or MANUAL Switch is probably defective To isolate the MANUAL Switch from the counter proceed as follows Confirm that 5Vdc exists on pin 9 at the rear of the interface cable connector attached to the Al motherboard Attach the shorting jumper between test points 1 and 2 and check that the multimeter reads less than the previous dc voltage If less then the MANUAL Switch is probably defective If dc voltage does not decrease after the shorting jumper is attached then he four bit counter is defective This condition can be confirmed by viewing absence of waveform on scope at pin 9 after the shorting jumper is attached STROBE SWITCH MANUAL STROBE TOR AND INVERTERS UIA UIB Connect os cilloscope input between pin 33 and test point 3 Set up scope for display of 0 5us pulse s descending to 0 from 5 4 Depress STROBE pushbutton switch repeatedly and observe more than one decend ing pulse of the extent and magnitude given above If no pulse is obtained repeatedly attach shorting jumper between test points 4 and 5 and check scope for pulses If pulses are obtained STROBE switch is defective If no pulses take scope input from TRIGGER OUTPUT jack J5 and look for ascending pulses If pulses are obtained integrated circuit in verter UIA is defective If no pulses are obtained e
190. onfigurations which can use chassis slides all variations related to the standard 19 inch equipment rack a Disconnect the line power cord Peel the decal shown in Figure 6 2 from each front side panel Install the mounting brackets on each front side panel using the 8 32 x 1 2 PHP screws provided in the kit The mounting brackets for offset in 6 3 INSTALLATION PROCEDURES stallation can be installed on either side as desired HANDLES NOT SHOWN CHASSIS SLIDE MO0 200 610 18 HALF RACK M00 280 610 24 zig DUAL MOUNTING 05 200 803 HALF RACK CENTER MOUNTING M05 203 602 CHASSIS SLIDE HALF RACK Mone erate FULL RACK OFFSET MOUNTING pee RACK MOUNTING M05 203 60t HANDLES NOT SHOWN M05 205 800 Figure 6 1 ACCESSORY RACK MOUNTING KITS 6 1 4200 Rack Mounting DECAL MOUNTING BRACKET 8 32 x 1 2PHP SCREW Figure 6 2 RACK MOUNTING BRACKET INSTALLATION d Remove the feet from the bottom dust cover Slide the instrument into the equipment rack and secure itin place with fasteners through the mount ing brackets NOTE Chassis slides should be installed on the full Tack width units See Figure 6 1 A f Connect the power cord to line power 66 Dual Units Installation 6 7 Two half rack width instruments can be install ed side by side in an equipment rack using the M05 200 603 Rack Mounting Kit To install these components and mount the un
191. ontrol Logic 01 Option 6 12 MCU provides the digital input programming including the STROBE pulse necessary to test and control an associated 4200A power source equipped with an isolated control logic option 01 Option or with an inverted isolated control logic option 08 Option When using either option a STROBE pulse is required to start the digital to analog conversion process after a valid digital in put program is entered In MANUAL mode the STROBE pulse is generated by manual depression of the STROBE pushbutton In AUTO EXTERNAL REFERENCE mode the STROBE pulse is generated automatically following a l 5us delay that terminates the last programmed bit The STROBE pulse is 0 54 sec wide with a minimum width of 500 ns A negative slope 5V to 0 transition is required 6 13 Direct Coupled Control Logic 04 Option 6 14 Power sources using the direct coupled control logic option do not require use of the STROBE pulse When used in the AUTO mode the performance is limited by the timing format of the STROBE pulse Ideally the STROBE pulse should precede the input data change and last until the input data is settled The STROBE pulse how ever occurs about 1 Sus after the change of input data and lasts about 0 55 Consequently voltage spikes may occur going to O volts when voltage levels are stepped These spikes may be observed on an oscilloscope when monitoring the power source output and do not indicate
192. ontrol Logic Option 01 a strobe pulse is required to start the digital to analog conversion process after a valid command is present Minimum pulse width is 500 nanoseconds A negative leading slope 5V to OV transition is required Connector Pin 29 Logic 0 Low Voltage Range Logic 1 High Voltage Range EXTERNAL REFERENCE STANDBY 14 Connector Pin 36 Logic 0 Internal DC Reference Logic 1 External Reference Connector Pin 34 Logic 0 Operate Mode Logic 1 Standby Output is 1 of programmed value 4270A Table 1 2 PROGRAMMING INPUT OUTPUTS CURRENT LIMIT Connector Pin Function Logic 1 Logic 0 42 Range 0 5 amp 50mA 43 Magnitude 80 of Range 0 5 44 Magnitude 40 of Range 0 10 of range 45 Magnitude 20 of Range 0 46 Magnitude 10 of Range 0 RESPONSE SIGNALS CURRENT LIMIT FLAG Connector Pin 49 Logic 1 represents a current limit condition READY NOT READY FLAG Connector Pin 37 Logic 0 Ready condition following 110us delay to allow the output to settle to within 0 0196 of the programmed increment for a resistive load Not Ready condition the power source is in the process of settling to the programmed value READY NOT READY FLAG Logic 1 POWER Connector Pin 25 CONNECTIONS An internal isolated power sup
193. orage registers The data data word and control word is transferred in a bit by bit serial fashion across the guard shield to the voltage source digital to analog converter This transfer is initiated by the control word strobe data word strobe or both as J Refer to Figure 609 4 The voltage source does not respond to newly programmed data until the transfer is complete 609 53 For standard Binary or BCD configurations entering either the data word or control word initiates a data transfer from the input shift registers to the voltage source Standard jumpering is from pad E to pad F and from pad 6 to pad H If only the control word is to initiate a data transfer jumper pad G to H and pad Dto E If only the data word is to initiate data transfer jumper pad H to pad J and pad to pad NOTE When either the data word or control word initiates a transfer all data stored in the input shift registers is transferred For example if the transfer is initiated by a control word then the previously entered data word is transferred along with the current control word 609 54 VOLTAGE SOURCE STATUS FLAGS 609 55 Each 4200 09 provides four separate status indications to the program source Each status indication flag uses a separate line but corresponding status lines of all 4200 09 voltage sources within a multiple source system are bussed together The status flags provided are 1 Abnormal status power off or current limi
194. ould a current limit occur in the positive or negative section of the Output Stage the associated Q13 or Q17 in the Driver wili be turned off This turns off Q14 Q15 or Q18 Q19 thus turning Q16 off and producing an I LIMIT 0V com mand at terminal 14 of P1 3 13 3 14 41 INTRODUCTION 42 This section contains servicing information for the instrument Table 4 1 lists the recommended test equipment If the recommended equipment is unavailable use test equipment of equivalent or superior specifications 4 3 SERVICING INFORMATION 44 All products manufactured by the John Fluke Mfg Co Inc are warranted for a period of one year Complete warranty information is located in the WARRANTY at the front of the manual 4 5 Factory authorized calibration and services is avail able at various world wide locations A list of authorized service centers is located at the front of the manual If re quested an estimate will be provided before repair work is done on an instrument that is beyond the warranty period 46 GENERAL MAINTENANCE 4 7 Cleaning 4 8 This instrument should be cleaned periodically to remove dust grease or other contaminates The exterior of the instrument can be cleaned with a clean cloth moistened with anhydrous ethyl alcohol or Freon T F De greaser MS 180 available from the Miller Stephensen Chemical Co Inc If neither cleaning agent is readily avail able soap and water applied sparingly to a cle
195. ply furnishes 5Vdc current limited by 2 7 ohms for use by the external system interface logic It is recommended that a large logic ground strap be used be tween the interface logic and the power source to reduce the digital programming noise on the system ground Connector Pins 17 thru 24 LOGIC GROUND lt SIGNI FICANT DIGIT NOT USED RANGE VOLTS TOOT NOT USED STROBE STANDBY SIGN EXT REF ROY ROY FICANT NOT USED DIGIT gt LOGIC GROUND LEAST SIGNI RANGE CURRENT gt 07 OPTION USED 80 RANGE 4096 RANGE SOS OPTION 20 RANGE Z gt use or 07 OPTION SUBSTITUTES 109 RANGE FOR 06 OPTION AND PROVIDES LEAST SIGNIFICANT DIGITS ON J1 USED PINS AS FOLLOWS LIMIT 3 NOT USED 4 45 46 UDTUUUUUUgUUUHUuHguuu nnnnnnnannnnnnnnnnnnnrntr A c 2 2 58 p p Figure 1 2 PROGRAMMING CONNECTOR PIN ASSIGNMENTS 1 5 1 6 static awareness A Message From John Fluke Mfg Co Inc Some semiconductors and custom IC s can be damaged by electrostatic discharge during handling This notice explains how you can minimize the chances of destroying such devices by 1 Knowing that there is a problem 8 DI CN 2 Lea
196. provide memory during programming changes Normally HOLD command OV is present at terminal P of P1 and 023 is conducting This condition turns on Q21 and Q22 and the output of Q18 is amplified by Q24 Q25 During programming changes however presence of a HOLD command 5V at terminal P of P1 turns off 023 and 021 022 Capacitors C10 and C11 which are connected to the inputs of Q24 then hold a sample of the last input from Q18 and hold the output voltage rela tively constant for the duration of the HOLD command The HOLD period is short enough and the circuit constants are chosen so that negligible output voltage change occurs A secondary HOLD circuit composed of U1 and Q35 through Q37 provides a clamp to analog ground at the input of Q18 during the HOLD command Preserice of a HOLD command 5V presets J K flip flop U1 to provide alow Q output which turns on 037 036 is switched on by the resulting Vr common base signal and turns on Q35 which applies analog common to the base of Q18 3 55 Transistor Q26 functions as high impedance con stant current source for Q25B Q27 and Q28 amplify the output of Q25B and furnish a drive signal to Q29 3 56 OUTPUT STAGE 3 57 Emitter follower 029 provides a low impedance output signal at terminal 5 of P1 This signal is applied to the A9 Power Amplifier which then produces the power Source output 3 58 4 External Reference 4210A 1041 3 59 The A4 External Reference is in
197. r resistor is connected to common using a driver such as the one shown in Figure 3 4 When the bit command is high OV QA and QC are both turned off which applies V to the gate of QB and Vg to the gate of QD This condition switches QD on and QB off thus applying through QD to the ladder resistor Ry Absense of a bit command will apply a low 5V to the base of QA which causes it to conduct The resulting collector signal switches on gate QB and the driver QC Con duction of QC applies V to the gate of QD turning it off a result Vp gp common is applied through QB to the ladder resistor RN TO LADDER Ov FALSE Figure 3 4 LADDER DRIVER SIMPLIFIED 3 74 Isolated Control Logic 4275A 1021 3 75 The A6 Isolated Control Logic assembly receives and processes all input and output data at the Programming Connector J1 A logic diagram in simplified form is shown in Figure 3 5 3 76 PRESET GENERATORS 3 77 Two Preset Generators are used in the Isolated Control Logic Their purpose is to preset all counters flip flops and registers to their proper state when the supply is first turned on This is to insure that the output of the power source is programmed to its minimum value and that all logic is in the proper state to accept input data and process it properly upon command One Preset Generator is used to preset the input programming circuitry and is
198. rame Single line used to address the voltage source in order to address zero perform any programming function The addressing signal must be present in order for any strobe signal to be recogn ized by the 4200 09 logic Logic 1 is address true Logic O is address false 4 9 609 3 4200 09 Table 609 2 Input Output Signals Binary Program Source cont PIN NUMBER SIGNAL NAME DESCRIPTION 50 PIN 56 PIN T CONN CONN Logic 1 2 4 to 5V Logic 0 0 to 4V 21 amp 6 thru 11 Instrument mainframe Seven lines through connections used to address up to 45 thru 50 address one through seven succeeding voltage sources seven 18 13 Control Word Strobe Single line which accepts a Logic 1 1 us or longer pulse to load the control word or data word depending on the state of the strobe control line See Sheet 1 pins D amp 13 9 15 Poll status Single line used to poll status Vcc failure and current limit mode A Logic 0 causes the generation of Vcc and current limit status at their respective outputs 29 22 Polled current limit Single line which generates a Logic 0 when the polled 4200 flag is in the current limit mode 28 21 Polled power off Single line which generates a Logic 0 when the Vcc supply flag of the polled 4200 fails power off 27 23 Abnormal status Single line which generates a Logic 0 whenever a 4200 goes to the current limit mode or the Vcc supply fails power off T
199. ree run at approximately 10kHz The square wave output is used in the auto control mode to clock the binary counter and to trigger the auto strobe generator 6 68 AUTO STROBE GENERATOR 6 69 The Al auto strobe generator is composed of transistors 04 05 and inverter amplifiers through plus related circuit components It is an active pulse shaping network that is used to supply a strobe pulse in the auto and external modes of MCU operation The negative descent of each 10kHz pulse from the 10kHz MV triggers the auto strobe generator Following an approximate delay of 1 5 microseconds a strobe pulse of half a microsecond approaching 0 volts from a 5 Vdc reference is produced at the input of inverter amp U1B The output of U1B prod uces a positive going pulse that is applied as a trigger at trigger output jack J5 Inverter amp returns the strobe pulse to its original excursion and presents it at pin 33 of the programming connector 6 70 MANUAL STROBE GENERATOR 6 71 The Al manual strobe generator is composed of transistors Q6 Q3 A3 control mode switch S9 STROBE and related circuit components The manual strobe pulse generator is built around a programmable unijunction tran sistor PUT Q6 which is effectively anode gated by the application of a positive voltage through the momentary closed contacts of the STROBE pushbutton switch S9 The firing of Q6 turns on gating transistor Q3 which effec tively applies a l
200. rent range switch Q26 are turned on placing operational amplifier U4 in low range This ensures that the Model 4275 current limits at the lowest current limits at the lowest current 10 milliamps as a safety feature In the event a programmed input for 80 milliamps is applied to the converter the logic input is applied to two circuits one directly to the base of FET Driver Q13 and the other indirectly through two inverters U2F and U1A to the base of FET Driver Q10 These two drivers turn on ladder switches Q9 and Q12 and two code 4 ladder resistors there by applying an equivalent 8 to the Programmable Reference amplifier and establishing a current limit of 80 milliamps 4270A 3 95 FET DRIVERS 3 96 The ladder FET DRIVERS consist of PNP NPN Transistor pairs Q3 Q5 Q7 Q8 Q13 Q14 and Q10 Q11 The emitters of these pairs as well as the current range FET drivers 015 016 are returned to common through a ground isolator network is described later The purpose of the drivers is to increase the voltage output of the converters to a level required by the FET switches 3 97 LADDER VOLTAGE REFERENCE 3 98 Ladder Voltage Reference consists of a temp erature compensated 6 3 volt zener diode CR7 and produces a stable reference voltage that is reduced to 0 1 volt at TP3 by resistors R4 R6 and R59 This voltage reference is supplied by the regulated 15 volts power supply TP2 consisting of 16 volt zener transistor 0
201. requency federal stock number gram giga 10 guard germanium gigahertz guaranteed minimum value ground henry heavy duty List of Abbreviations and Symbols LED LSB LSD mA max mf MHz min ms MSB MSD MTBF or neg NO ns opni ampi p para pcb pF pn high frequency hertz integrated circuit intermediate frequency inch es internal input output kito 105 kilohertz kilohm s kitovolt s low frequency light emitting diode least significant bit least significant digit mega 108 milli 10 3 milliampere s maximum metal film megahertz minimum millimeter millisecond most significant bit most significant digit mean time between failures mean time to repair millivoit s multivibrator megohm s nano 10 not applicable normally closed negative normally open nanosecond operational amplifier pico 1072 paragraph printed circuit board picofarad part number or positive pot PROM psi RAM rf rms ROM s or sec scope SH Si semo st Ta tc texo uory us or uut v var vit vit ww xtmr xstr xtal xilo potentiometer peak to peak parts per million programmablle read only memory pound force per square inch random access memory radio frequency root mean square read only memory second time oscilloscope shi
202. ription of each part c Fluke Stock Number d Federal Supply Code for Manufacturers See Section 7 for Code to Name list e Manufacturer s Part Number or Type f Total Quantity per assembly of component Recommended Quantity This entry indicates the recommending number of spare parts necessary to support one to five instruments for a period of two years This list presumes an availability of common electronic parts at the maintenance site For maintenance for one year or more at an iso lated site it is recommended that at least one in 52 each assembly in the instrument be stocked In the case of optional subassemblies plug ins etc that are not always part of the instrument or are deviations from the basic instrument model the REC QTY column lists the recommended quantity of the item in that particular assembly 54 HOW TO OBTAIN PARTS 5 5 Components may be ordered directly from the manufacturer by using the manufacturer s part number of from the John Fluke Mfg Co Inc factory or authorized representative by using the FLUKE STOCK NUMBER In the event the part you order has been replaced by a new or improved part the replacement will be accompanied by an explanatory note and installation instructions if necessary 5 6 To ensure prompt and efficient handling of your order include the following information Quantity b FLUKE Stock Number es Description d Reference Designation or Item Number
203. rmer Co Div Geneva New York 44655 Ohmite Mfg Co Skokie Illinois 49671 RCA Corp New York New York 49956 Raytheon Company Lexington Massachusetts 50088 Mostek Corp Carrollton Texas 50579 Litronix Inc Cupertino California 51605 Scientific Components Inc Linden New Jersey 53021 Sangamo Electric Co Springfield iHinois 54294 Cutler Hammer Inc formerly Shalicross A Cutter Hammer Co Selma North Carolina 55026 Simpson Electric Co Div of Am Gage and Mach Co Eigin 56289 Sprague Electric Co North Adams Massachusetts 58474 Superior Electric Co Bristol Connecticut 60399 Torin Corp formerly Torrington Mfg Co Torrington Connecticut 63743 Ward Leonard Electric Co Inc Mount Vernon New York 64834 West Mfg Co San Francisco California 65092 Weston Instruments Inc Newark New Jersey 66150 Winslow Tele Tronics Inc Eaton Town New Jersey 70485 Atlantic India Rubber Works Chicago Illinois 70563 Amperite Company Union City New Jersey 70903 Belden Corp Geneva Illinois 71002 Birnback Radio Co Inc Freeport New York 71400 Bussmann Mig Div of McGraw Edison Saint Louis Missouri 71450 CTS Corp Elkhart indiana 71468 Cannon Electric Inc Santa Ana California 71482 Clare C P amp Co Chicago Illinois 71590 Centrelab Electronics Div of Globe Union Inc Milwaukee Wisconsin 71707
204. rning the guidelines for handling them 3 Using the procedures and packaging and bench techniques that are recommended The Static Sensitive S S devices are identified the Fluke technical manual parts list with the symbol The following practices should be followed to minimize damage to S S devices 3 DISCHARGE PERSONAL STATIC BEFORE HANDLING DEVICES 1 MINIMIZE HANDLING 2 KEEP PARTS IN ORIGINAL CONTAINERS UNTIL READY FOR USE 4 HANDLE S S DEVICES BY THE BODY Page 1 of 2 5 USE ANTI STATIC CONTAINERS FOR HANDLING AND TRANSPORT 6 DO NOT SLIDE S S DEVICES OVER ANY SURFACE ud 7 AVOID PLASTIC VINYL AND STYROFOAM IN WORK AREA PORTIONS REPRINTED WITH PERMISSION FROM TEKTRONIX INC AND GENERAL DYNAMICS POMONA DIV Dow Chemicat Page 2 of 2 8 WHEN REMOVING PLUG IN ASSEMBLIES HANDLE ONLY BY NON CONDUCTIVE EDGES AND NEVER TOUCH OPEN EDGE CONNECTOR EXCEPT AT STATIC FREE WORK STATION PLACING SHORTING STRIPS ON EDGE CONNECTOR USUALLY PROVIDES COMPLETE PROTECTION TO INSTALLED SS DEVICES N CA 9 HANDLE S S DEVICES ONLY AT A STATIC FREE WORK STATION 10 ONLY ANTI STATIC TYPE SOLDER SUCKERS SHOULD BE USED 11 ONLY GROUNDED TIP SOLDERING IRONS SHOULD BE USED Anti static bags for storing S S devices or pcbs with these devices on them can be ordered from the John Fluke Mfg Co Inc See section 5 in any Fluke technical manual for ordering inst
205. rocedure provides a resolution check on the E decade Required equipment is a FLUKE Model 8400A 01 AC DC Voltmeter or equivalent and a FLUKE Model A4200 Manual Control Unit MCU a Connect Model A4200 MCU as described in steps 6 11 a and b b Connect Model 8400A 01 Voltmeter to tOUT PUT TERMINALS of barrier strip on rear of Model 4210A 07 c With all decades set to zero perform steps 1 through 5 in Table 6 3 Each push button on the 4200 MCU must be released for each succeeding step following step 2 Each step also must be followed by a STROBE 1 20 75 4200 SERIES OPTION 07 Table 6 3 RESOLUTION CHECK STEPS EE OUTPUT VOLTAGE uV 0 100 Record voltage 100 gt Step 1 Voltage 200uV gt Step 1 Voltage 400uV gt Step 1 Voltage 800uV gt Step 1 Voltage 6 21 LIST OF REPLACEABLE PARTS 6 22 For column entry explanations part ordering in formation and basic instrument configuration Use Codes and Serial Number Effectivity List see Section 5 para graphs 5 1 through 5 10 See paragraph 6 40 this option subsection for additional Use Codes and Serial Number Effectivity List assigned to this printed circuit assembly option 6 23 SERIAL NUMBER EFFECTIVITY 6 24 A Use Code column is provided to identify certain parts that have been added deleted or modified during production of the Model 4210A Each part in this option for which a use code has been assigned may be identified with
206. rogram switches to the programmable power source via the interface cable and programming connectors However before the power source can act on the logic levels present on each of the 16 data lines a logic level O manual strobe pulse must be entered This is accomplished by manual depression of the strobe pushbutton switch S9 applying a logic 1 to the manual strobe generator Q6 Q3 which in turn supplies a logic 0 10kHz MULTIVIBRATOR OUTPUT BINARY COUNTER U3 OUTPUT AUTO STROBE GENERATOR OUTPUT FIGURE 6 6 A4200 MCU to inverter U1B The dual inversion of inverters U1B and then supplies the programmable power source with a logic 0 and the programmed output voltage appears at the output of the power source when the power source is equipped with the isolated control logic option 6 53 With auto mode selected by A3 control mode switch S11 the previously selected manual mode switch is disconnected through interlock action This removes the logic 0 applied to the set lines of binary counter U3 Simultaneously the 10kHz multivibrator output is applied to two places to the clock input of binary counter U3 and to the input of the auto strobe generator Q5 Q4 The 10kHz multivibrator input to the binary counter U3 clocks it low initially and triggers the repetitive waveform pattern shown in Figure 6 6 The multivibrator input to auto strobe generator Q5 Q4 produces a 10kHz strobe pulse at its output approximately half
207. rogramming bit is used to remove the in DATA STROBE REUS C DELAY ONE SHOT 800ns 15 READY NOT READY FLAG k nop 4 OVERLOAD k 1106 FLAG TRANSFER TIME DECADE DATA Figure 2 8 ISOLATED CONTROL LOGIC TIMING 01 OPTION 2 7 4270A ternal 10Vdc reference from the D to A ladder network and switch in an external signal source to replace it The output accuracy and stability of the power source however is then relative to the accuracy and stability of the external signal source 243 The external reference may be any dc or ac signal with an amplitude between 0 and 14 5Vdc or peak ac volts rms x 1 414 and have a frequency between dc and 30kHz It is applied to the external reference terminals located on the rear panel barrier strip The input imped ance at these terminals is 100k ohms in parallel with 70pF The external reference is programmed by applying a Logic 1 to pin 36 of the programming connector It should be noted that the polarity of the output will be the same as the external reference regardless of the SIGN polarity pro grammed 244 Programming the magnitude of the output voltage with a 10 volt external reference is accomplished by the same method used for programming with the internal ref erence voltage See paragraph 2 31 However if the external reference is not exactly 10 volts the magni
208. rs Resist ors R2 and R3 function as discharge resistor for C2 and C3 respectively Positive voltage regulation is accomplished by series pass element Q1 which is controlled by driver Q2 Reference voltage for the positive supply is established by Zener diodes CR5 and CR6 Regulation of the negative supply is accomplished by Q3 Q4 CR7 and CR8 which function in a similar manner as the positive supply 3 32 SUPPLY 3 33 Vppp Supply produces an extremely stable 10V dc reference upon which the accuracy and stability of the power source is based Circuitry of this supply consists of a stable reference amplifier U2 a differential amplifier U1 series pass element 01 an inverter amplifier U3 and an emitter follower Q4 3 34 reference amplifier U2 contains matched zener and transistor elements which produce a time and tempera ture stabilized reference voltage The zener element receives a portion of its bias current from the 23 4V supply through R4 and The amplifier element receives collector cur rent from the same source through R5 Base current for this amplifier is provided through a divider composed of R9 R14 R16 R56 and R59 This divider is connected to the sense line The FET switches Q2 and Q3 provide separate output and sense connections when a positive is called Should any variations occur on the sense line U2 will amplify them with respect to the zener elemen
209. ructions Use the following part numbers when ordering these special bags John Fluke Part No Description 680892 5 x 8 Bag 680934 8 x 10 Bag 680942 8 x 12 Bag 680983 12 x 16 Bag 681023 18 x 18 Bag Pink Poly Sheet Wrist Strap 30 x 60 x 60 Mil P N TL6 60 P N RC AS 1200 7 00 20 00 J0089C 07U8412 SE EN Litho in U S A 42704 Section 2 Operating Instructions 2 1 INTRODUCTION 2 2 This section contains information regarding install ation and operation of the Model 4270A It is recommended that the contents of this section be read and understood be fore any attempt is made to operate this power source Should any difficulties be encountered during operation please contact your nearest John Fluke Sales Representative or the John Fluke Mfg Co Inc P O Box 43210 Mount lake Terrace Washington 98043 telephone 206 774 2211 A list of Sales Representatives is located in Section 7 of this manual 2 3 SHIPPING INFORMATION 24 The Model 4270A was packaged and shipped in a foam packed cardboard carton Upon receipt a thorough inspection should be performed to reveal any instrument damage incurred in transit Special instructions for inspec tion and claims are included in the carton 2 5 If reshipment of this power source is necessary the original container should be used If the original container is not available a new one can be obtained from the John Fluke Mfg Co Inc Please reference t
210. s comp 51 5 Res met film 13k 1 1 8W Not used Res met film 10k 1 1 8W Res met film 28k 1 1 8W Res comp 27k 5 148023 246744 148031 267138 148189 193383 147975 234252 182956 159731 193482 218032 148056 261685 221879 335539 168260 291385 148148 4270A CB1025 CB2705 CB1525 MFF1 81152F CB1045 CB3945 CB3915 CB1325 MFF1 83242F CB1235 CB2015 CBS115 CB3325 MFF1 86981F CB5105 MFF1 8133F MFF1 8103F MFF1 8283F CB2735 4270A MFG DESCRIPTION PART NO Res comp 5 1k 5 193342 CB5125 Xfmr 299594 299594 IC TTL MSI 8 Input Multiplexer 326165 9313 IC TTL Hex Inverter 293076 SN74HO4N IC TTL MSI Digital Multiplexer 288852 MC8312 IC TTL MSI Synchronous 4 bit up down 293183 SN74193N counter IC TTL Hex Inverter 292979 SN7404N IC TTL JK Master Slave Flip Flop 296491 SN7472N IC TTL Dual Retriggerable Monostable 310235 SN74123N Multivibrator IC TTL Dual 2 Wide 2 Input and or inverter 293084 SN74H5IN gate IC TTL JK Negative Edge Triggered Flip 293092 SN74H102N Flop with AND Inputs IC TTL Quadruple 2 Input Positive AND gate 292987 SN7408N IC TTL Quad 2 Input NAND Gate 292953 SN7400N IC TTL Dual Peripheral Pos NAND Driver 329706 SN75452P IC TTL Monostable Multivibrator 293050 SN74121N IC TTL Retriggerable Monostable 293134 U6A960159X Multivibrator IC TTL 8 bit Parallel outshift regi
211. son Electronic Div Mc Gray Edison Co Manchester New Hampshire 14193 Cal R Inc formerly California Resistor Corp Santa Monica California 14298 American Components Inc an Insilco Co Conshohocken Pennsylvania 14655 Cornell Dublier Electronics Division of Federal Pacific Electric Co Govt Control Dept Newark New Jersey 14752 Electro Cube Inc San Gabriel California 14869 Replaced by 96853 14936 General Instrument Corp Semi Conductor Products Group Hicksville New York 15636 Elec Trol Inc Saugus California 15801 Fenwal Electronics inc Div of Kidde Walter and Co inc Framingham Massachusetts 15818 Teledyne Semiconductors formerly Amelco Semiconductor Mountain View California 15849 Litton Systems Inc Useco Div formerly Useco Inc Van Nuys California 15898 International Business Machines Corp Essex Junction Vermont 15909 Replaced by 14140 16258 Space Lok Inc Burbank California oe ee mE 16299 Corning Glass Electronic Components Div Raleigh North Carolina 16332 Replaced by 28478 16473 Cambridge Scientific Ind Div of Chemed Corporation Cambridge Maryland 16742 Paramount Plastics Fabricators inc Downey California 16758 Delco Electronics Div of General Motors Corp Kokomo Indiana 17001 Replaced by 71468 17069 Circuit Structures Lab Burbank California 17338 High Pressure Eng Co Inc Oklahoma City Okl
212. source via the interface cable is done as follows CAUTION The Model A4200 MCU is NOT compatible with the 09 option a Turn off the power source and disconnect the programming connector from the rear panel of the power source b Connect the interface cable connectors to both the programming connector on the power source and on the MCU Select the desired operating configuration on the top panel of the MCU and then turn on the power source The power source is now ready for opera tion with the MCU 6 7 OPERATING INSTRUCTIONS 6 8 The location and function of the MCU controls indicators and connectors are described in Figure 6 2 The active or high level logic state of the pushbutton switches on the MCU is the depressed or in state However in the event the associated power source is equipped with the inverted logic option 08 Option the logic level states of all pushbuttons defined below is high when the pushbuttons are extended or out When depressed or in the logic level state islow This condition applies to all pushbuttons except STROBE MANUAL AUTO and EXT Figure 6 2 function ally describes the MCU controls indicators and connectors related to an associated power source that is not equipped with an 08 Option 69 OPERATING FEATURES 6 10 The following paragraphs describe operating features relating the MCU to power sources and should be read prior to operating the MCU 6 11 6 2 Isolated C
213. ss to all of the calibration adjustments test points and most of the PCB assemblies Note that most of the calibration adjustments are labeled on the guard cover Removal of the 10 PCB requires prior removal of the A2 PCB the bottom dust cover and the A9 Power Amplifier PCB and heat sink However if A10 PCB removal is not desired proceed to step k otherwise continue as follows The A9 heat sink is secured to the bottom guard tray by two Screws accessible from the upper surface of the guard tray The A9 PCB assembly and attached heat sink are removed from the A1 PCB as a unit following disconnection of the A9S1 thermostatic switch cable A9WI from the A10 PCB at 10 2 Refer to Interconnect Diagram 4270A 4275A 1000 d Following removal of the A9 PCB the machine Screws securing the two longitudinal cross braces to the guard tray must be removed Next four large machine screws securing the lateral cross bracket to the front panel at the rear of the Al PCB two high and two low must be removed e The lateral and longitudinal cross braces with attaching A10 PCB A10 heat sink and 1A1T1 power transformer may be displaced obliquely internal of the instrument following removal of two machine screws through the rear panel of the instrument and disconnection of the 10 1 con nector PCB from the A2 PCB receptacle J1 In addition the blower power cable A10W3 must be either unsoldered from the A10 PCB or disconnected from th
214. stalled as the 03 Option It receives and processes an external reference input having a frequency of dc to 30 kHz and a level from 0 to 14 5 dc or peak ac The circuitry consists of three dif 35 4270A ferential amplifiers and an emitter follower which form an operational amplifier FET gates Q9 and Q10 controlled by drivers Q11 and Q12 apply the amplifier output and sense line to Vggp line in Preamplifier 3 60 DIFFERENTIAL AMPLIFIER 3 61 The differential Amplifier consists of three in dividual amplifiers Q1 through Q8 and the emitter follower of Q13 The external reference input is applied through R1 and C9 to tone input of the differential FET Q1 This stage amplifies the input in respect to common and provides a differential input to Q5 Feedback through R16 and R17 maintains the input of Q1 at virtual common Adjust ment of R17 controls the overall gain and subsequently the output high at terminal 4 Variable resistor R6 allows zero offset adjustment of the output Vp EF high Jumper selection of R5 and R8 through R10 provides coarse adjustment of offset Selection of RN and Rp in the drain circuit of Q1 is done to provide a low temperature coefficient for the offset voltage A constant current source for Q1 is provided by Q2 while TC compensation of the current source is provided by Q3 The differential Darlington composed of Q4 and Q5 amplifies the output of Q1 and furnishes
215. ster 272138 SN74164N Connector female 267252 57 40360 Guard logic 331785 331785 42704 Figure 5 7 ISOLATED CONTROL LOGIC 5 27 MFG PART TOT REC USE DESCRIPTION BCD DISPLAY PCB ASSEMBLY 302257 302257 REF PANEL DISPLAY OPTION Figure 5 8 Diode light emitting 309617 27 Res comp 270 5 160804 CB2715 27 IC TTL Hex Inverter 292979 SN7404N 5 5 Y 1 2 gt T H n in T I Y L lt T B gt n gt Bae L r L x T UJ Figure 5 8 BCD DISPLAY PCB ASSEMBLY 4270A CURRENT LIMIT PCB ASSEMBLY 06 Option TOT RECJUSE DESCRIPTION CURRENT LIMIT PCB ASSEMBLY 332973 332973 06 Option Figure 5 9 plstc 0 1 uf 10 250V 161992 C280AE 100 Cap mica 10 pf 10 500V 175216 DM15C100K Cap plstc 0 033 uf 1096 200V 106062 192P33392 Cap mica 4 pf 5 500V 190397 15 0407 mica 27 pf 5 500V 177998 DM15E2703 Cap cer 0 0012 uf 10 500 106732 Cap mica 33 pf 5 500V 160317 DM15E330J plstc 0 022 uf 10 250V 234484 C280AE A22K Diode zener 16V 113332 1N966A Diode zener 20 mA 3 9V 113316 Diode zener 12 5 mA 246611 1N961B Diode zener 36V 186163 1N974B Diode zener 6 3V 7 5 mA 172148 1N3496 5 29 427
216. sulated shorting jumper between A3TP3 and ASTP1 Release the RANGE button and depress the STROBE button to select OV output on the 10 volt range Check that the 110 VOLT RANGE indicator goes out Adjust ZERO for 10uV output Depress the B decade 8 and STROBE buttons Check that the output voltage is about 8Vdc and that the B decade 8 indicator is on Record the exact dc voltage read in step e and then divide the recorded value by 2 for a final value e g 8 00383Vdc 2 4 00192Vdc Recorded value 25 Final Value Release the B8 button and depress the B4 and STROBE buttons Check that the output voltage is about 4Vdc and that only the B decade 4 indicator is on Adjust 5 for an output that is within 100uV of the final value computed in step f e g 4 00192Vdc 100uV Release the B4 button depress STROBE and re move the jumper between A3TP1 and 5 In Stall the guard cover and insert all guard cover screws Check that the B decade 4 indicator is out 4 5 4270A 4 22 a 46 Zero Reference and Bit Adjustments Release all MCU buttons except MANUAL and depress RANGE and STROBE to obtain OV output in the high range Check that the 110 VOLT RANGE indicator is on and that the dc voltmeter is connected as defined in step 4 19 a Adjust ZERO for 70uV output using an insulated screwdriver or tuning tool Release RANGE and depress STROBE Che
217. t flag 2 Polled current limit flag 3 Polled power off flag 4 Not ready flag 4 79 4200 09 NOTE All flag lines are wire ORed to an open collector bus Pull up resistors are required in the program source for the flag lines to reach T5 volts 609 56 Voltage source status checking is usually programmed to allow an abnormal status flagto interrupt the program source As a result of the interrupt the program source polls each 4200 09 in the system while monitoring both the polled current limit flag bus and the polled power off flag bus The not ready flag is not polled but when present it indicates that the voltage source has not had sufficient time to settle at a newly programmed voltage level 609 57 POLLED CURRENT LIMIT FLAG 609 58 Pin 29 of the voltage source 50 pin connector is the polled current limit line As shown in Figure 609 8 all current limit lines in a multiple source system are bussed but each voltage source poll status line pin 9 is separate To poll a voltage source status the voltage source poll status line is usually tied to the address line if the address is negative true The voltage source can then supply current limit information on the polled current limit line each time it receives an address signal When the voltage source uses a positive address Binary each poll status line pin 9 may be grounded and a separate status flag line supplied for each flag When polled the current limit
218. t Dr Stafford TX 77477 713 491 5995 San Antonio John Fluke Mfg Co Inc 10417 Guifdale San Antonio TX 78216 512 340 2621 UT Salt Lake City 6914 50 3000 East Suite 206 Sait Lake City UT 82021 801 268 9331 WA Seattle John Fluke Mfg Co inc 5020 148th Ave Suite 110 Redmond WA 98052 206 881 6966 Service Center Areas CA Burbank 213 849 4641 CA Santa Clara 408 727 8121 CO Denver 303 750 1228 FL Orlando 305 896 2296 IL Chicago 312 398 5880 MA Burlington 617 273 4678 MD Rockville 301 770 1576 NJ Paramus 201 262 9550 TX Dallas 214 233 9945 WA Everett 206 356 5560 For more information on Fluke products or Sales Offices you may dial 800 426 0361 toll free in most of the U S A From Alaska Hawaii or Washington phone 206 356 5400 From Canada and other countries phone 206 356 5500 John Fluke Mfg Inc P O Box C9090 Everett WA 98206 Fluke Holland B V P O Box 5053 5004 EB Tilburg The Netherlands Phone 013 673973 Litho in U S A 10 84 INTERNATIONAL SALES OFFICES Argentina Coasin S A Virrey del Pino 4071 DEP E 1 1430 CAP FED Buenos Aires Argentina Tel 1 552 5248 TLX 390 22284 Australla Elmeasco Instruments Pty Ltd P O Box 30 Concord N S W 2137 Australia Tel 2 736 2888 TLX 790 25887 Elmeasco Instruments Pty Ltd 21 23 Anthony Drive Mt Waverly Victoria 3149 Australia Tel
219. t reference The change is then applied to one input of U1 which also receives a sample of the Vg gp line from the divider composed of R2 and R3 in turn amplifies the change and alters the conduction of Q1 to maintain a constant 10V output for Vppp sense Variable resistor R9 allows adjustment of the sense line input to U2 and sub sequently the sense level 3 35 inverter amplifier composed of and Q4 pro duces a U3 is connected as an inverting unity gain amplifier Emitter follower Q4 functions as an output buffer Feedback through R19 and R18 controls the overall gain of both amplifiers Variable resistor R19 adjust this feedback level and subsequently the resultant Vp pp sense output level Resistors R6 and R21 compensate for TC factors associated with FET gates in the ladder section driven by VREF 3 36 GATE DRIVERS 3 37 The Gate Drivers of Q7 through Q11 control the conduction of the FET switches associated with the 34 Supply When the power source has a positive output pro grammed the command at pin 18 is low 5V thus turn ing on Q8 Q11 and switching off FET gates Q2 Q3 With Q8 on the emitter base junction of Q9 is reverse biased causing Q9 and Q10 to turn off thus turning on FET gates 05 Q6 and 025 The Vggp output applied to pin D is therefore 10V when a positive output is programmed Should a negative output be programmed the command at pin 18 is high
220. t the emitter of 011 corresponds closely to the programmed output voltage A closed loop dc gain of five is established by feedback through R62 and R21 Overall frequency response is con trolled to 6 db per octave by C6 Amplifiers Q22 and Q23 link common to the Preamplifier common VREF common such that current flow between these two points is minimized Q20 and Q21 provide current with respect to the common established by Q23 Q22 emitters Emitter follower Q9 and amplifier 010 provide voltage gain and a drive signal to the output emitter follower Q11 Overall frequency response to this point is controlled with feedback through C6 The resulting emitter voltage of Q11 is close to the final output voltage of the power source Transistors 024 and 025 function as current sources of 010 and 011 respectively 3 113 DRIVER 3 114 The Driver consisting of Q12 and Q26 form com plementary current amplifiers These amplifiers receive a bipolar drive voltage from Q11 and together with the CURRENT SOURCES produce respective drive currents for the output stage The voltage drops across Q13 CR33 Q17 and CR27 together with variable resistor R51 set the bias current required for the output transistors Q32 Q33 Q41 and 042 013 collector current is turned off when a current limit condition exists and Q17 is affected similarly for a current limit These collectors drive the CURRENT LIMIT DETECTOR 3 115 CLAMP CIRCUITRY 3
221. ta gating chip Go to the step number given for correct response 4 79 4200 09 Table 609 8 Troubleshooting Chart No Asynchronous Standby Go to the step number given for correct response STEP ACTION Are clock pulses present at pin 13 of U11 when standby selected Is pin 11 of U12 at Logic 0 Check Standby Operate input line Check 10 MHz 15 pin 12 of 011 at Logic 0 Check data transfer flip flop and divide by 16 counter carry output Is U21 input pin 13 at 2V or higher Check elements in primary and secondary circuits of T2 Check for excessive ripple at input pin 13 of U21 NOTE Logic 1 zero to 0 4V Logic 0 42V to 5V Table 609 9 Troubleshooting Chart No Current Limit Flag Go to the step number given ACTION for correct response 15 poll status line at zero volts Place zero volts on poll status line Is the output of the half wave rectifier circuit zero volts Is junction of CR3 and C15 greater than 2V 15 AC signal present at collector of Q12 Troubleshoot current limit oscillator and or power source flag input Check current limit flag status gate logic Replace amplifier U7 and check for excessive ripple of CR3 Check T1 and associated circuitry 4 79 609 27 4200 09 ACTION Table 609 10 Troubleshooting Chart No Power Fail and or Abnormal Status Flag Go to the step number given for correct
222. ters are loaded with the program data the control logic issues a hold command to the voltage source then after a short delay starts a 10 MHz clock 609 67 Clock output pulses are fed to the shift registers to move the program data out of the registers bit by bit to the coupling transformers at the guard shield When the program source indicates that the data word is a negative Binary number the data word is shifted out of its storage register via two s complementing logic This action is necessary since 4200 Binary Voltage Sources require positive Binary numbers in conjunction with a positive or negative polarity indicator The control word undergoes no complementing at any time 609 68 While the clock pulses are shifting program data across the guard shield clock pulses are also being fed across the guard shield and the hold one shot is triggered as a result of the hold command issued by the control logic On the inside of the guard shield clock pulses shift the serial program data into shift registers which provide the necessary serial to parallel conversion The 4200 Voltage Sources require parallel program data The hold one shot output is present for the duration of the serial data transfer across the guard shield It inhibits any change in voltage source output magnitude while the data word is being loaded into the shift register 4 79 4200 09 002 OL TWNOIS SNIWIL ALINDYID
223. that occurs each time a STROBE pulse is generated It is useful in synching a scope to the MANUAL STROBE mode However when using the AUTO or EXT modes which generate an automatic internal or external STROBE the output trigger provides a valid scope sync for the ready or not ready flag output only It cannot be used to monitor the power source output voltage in the AUTO or EXT modes 6 21 Ready Flag 6 22 READY FLAG jack provides an output connection for monitoring the ready or not ready flag voltage In the three control modes MANUAL AUTO or EXT the out put trigger provides a valid scope sync for displaying the flag voltage 6 23 PROGRAMMING SWITCHES 6 24 the twenty nine program switches located on the MCU top panel all but three are used to enter program ming inputs into the 4200A series power sources These three are AUTO MANUAL and EXT Figure 6 2 divides these switches into three groups of control mode switches magnitude and polarity program switches and function program switches 6 25 Control Mode Switches 64 6 26 four control mode switches provide manual or automatic control of the manually selected input data pro gam MANUAL AUTO or EXT are the three control modes selectable on the MCU 6 27 Manual Mode 6 28 MANUAL mode allows manual manipulation of the input programming data as well as manual generation of the STROBE pulse This mode is selected by depressing the Manual pus
224. the heat sink The brace may then be separated from the A10 components by a firm even pulling force NOTE can be mounted on an accessory extender PCB assembly for servicing See Section 6 for use of the extender and associated extender cable Removal of the A2 through A6 A8 and A9 PCB s is done by pulling rearward with a firm rocking motion on each PCB However those PCB s with rear panel brackets A2 and A6 must be freed of attaching rear panel screws The A9 PCB is secured to the bottom guard tray through the A9 heat sink Hence A9 PCB removal requires prior removal of heat sink attaching screws accessible from the upper surface of the bottom guard The A9 PCB and heat sink are withdrawn from the instrument as a unit following disconnec tion of the A9S1 thermostatic switch cable from the A10 PCB at 10 2 Refer to Interconnect Diagram 4270A 4275 A 1000 In the event the A2 PCB is removed from the Al PCB and reconnected via the extender PCB assem bly as in servicing or troubleshooting an accessory cable extender assembly must be used to tie the 2 and A10 PCB s together electrically The re commended installation is depicted in Section 6 of the manual m Access to the A1 and A7 PCB pair is possible after removal of the front panel To remove the front panel remove the bottom dust cover and then remove the rack mountings if installed from the front corners If no rack mountings are installed peel the de
225. tivity program the Programmable Current Limit Option 06 Option in the 42504 4265A 42704 and 4275 power sources The black numbered pushbuttons are used with the 4250A and 4265A power sources and the red numbered pushbuttons are used with the 42704 and 4275A power sources Pushbutton switches labeled in black enable selection of the desired current limit point in increments of 10mA low range or 100mA high range X10 for the 4250A and 4265A power sources Table 6 3 The red labeled pushbutton switches enable selection of the desired current limit point in increments of 5 mA low range or 50 mA high range X10 for the 4270A and 4275A Table 6 4 When none of the pushbuttons are depressed the current limit is 10 percent of selected range i e 10 mA and 100 mA for the 4250A and 4265A 5 mA and 50 for the 4270A and 4275A The 4210A and 4216A power sources do not utilize the programmable current limit PROGRAMMING SWITCHES CONTROLLED BY THE BINARY COUNTER PROGRAMMING SWITCHES Binary Counter 4210A 4250A outputs 4216 4265 4270 4275 1 1 1 1 4 64 1024 5 8 128 2048 2 2 2 2 8 128 2048 1 16 256 4096 4444 1 16 256 4096 2 32 512 8192 8 8 8 8 2 32 512 8192 4 64 1024 16384 A4200 BCD PROGRAM PROGRAM O Figure 6 4 VOLTAGE PATTERNS OBTAINABLE BY DECADE PROGRAMMING IN THE AUTO MODE 4210A 4250A AND 4270A 66 TABLE 6 2 4200
226. tmeter as described in step 4 26 a Table 4 3 LINEARITY CHECKS CALLED OUTPUT POWER SOURCE OUTPUT VOLTAGE OV 100 uv 111mV x1200V 222 120 333mV 1300 444mV i140uV 555mV 150 4666mV 160 777mV 1800 888mV 1900 999mV 200UV 31 111V z200uV 1V 0 2mV 2N 0 3mV 3V 0 AV 0 5mV 5V 0 6mV 0 7mV 7 0 7mV 18V 0 8mV 39V 0 9mV 10 1mV 16 665V 1mV 16 665V 1 ORYAT AWN ojo If the A4 External Reference PCB Assembly 03 Option is installed disconnect the ac dc voltmeter release all MCU buttons except MANUAL and de press EXT REF and STROBE Check that the EXT REF indicator comes on 4 7 4270A Apply 10Vac 0 02 400 Hz signal and connect an ac dc voltmeter to the EXT REF HI and LO in put terminals on the rear panel barrier strip Record the ac voltage indicated on the ac voltmeter Recorded value Remove the ac voltmeter from the EXT REF HI and LO input terminals and connect it to the OUT PUT HI and LO terminals Depress A decade 1 button and STROBE check that the A decade 1 indicator comes on and that the ac voltmeter reads within 500V of the level re corded in step c Depress RANGE A decade 4 2 1 B decade 4 2 1 and STRO
227. tude of the programming word required to obtain a specified out put voltage must be calculated as follows MPW Magnitude of the programming word Eout Output voltage Vdc EXT REF External reference voltage 10 volt range Eout 4 EXT REF Programming resolution EXT REF 10 100 volt range voit rang MPW Eout EXT REF x 104 Programming resolution EXT REF 10 Note Eout lt 110V It should be noted that the rated output of the power sup ply is 110 maximum at 0 55 ampere It therefore be comes obvious that when using the X10 volt range the pro gramming word can easily exceed the output capability of the power supply The following example using the pre viously shown formula for the X10 volt range illustrates this Example Find Eout Given EXT REF 14 5Vdc EXT REF 6 14 5Vac MPW BCD 9999 MPW BCD 9999 Range 110 volts Range 110 volts 28 MPW Eout x EXT REF Eout MPW x EXT REF 10 Eout 9999 x 14 5Vdc 10 Eout 144 9855 4 10 Eout in this example greatly exceeds the rated 110 volt out put capability of the power supply To avoid this situation always calculate MPW with Eout lt 110Vdc or peak ac 2 45 Front Panel Indicators 2 46 When the Front Panel Display 02 Option is in stalled status indicators light emitting diodes are provided on the front panel They indicate the programmed output voltage level output polarity current overload current
228. ulse gener ator is defective refer to the schematic and using the scope check each stage regressively from the base circuit of transistor Q4 until a waveform synched to 10kHz is found This point defines the input to the defective stage SWITCHES AND INDICATOR Troubleshooting of the pushbutton switches and indicator is done using a multimeter for either continuity or volrage checks Figure 6 7 MOTHER BOARD A1 CONNECTOR ASSEMBLY PCB TROUBLESHOOTING PROCEDURES DRAWING NO A4200 1800 4200 MCU A4200 MCU 6107 LIST OF REPLACEABLE PARTS 6 108 For column entry explanations part ordering in formation and basic instrument configuration Use Codes and Serial Number Effectivity List see Section See paragraph 6 109 this option subsection for additional Use Codes and Serial Number Effectivity List assigned to this printed circuit assembly option 6 16 6 108 SERIAL NUMBER EFFECTIVITY 6 110 Use Code column is provided to identify certain parts that have been added deleted or modified during production of the Model A4200 Each part in this option for which a use code has been assigned may be identified with a particular serial number by consulting the Use Code Effectivity List below All parts with no code are used on all serial numbers 123 and on NOTE These Use Codes and Serial Number Effectivity apply to this option only USE CODE SERIAL NUMBER EFFECTIVITY 4200 MCU eae 4
229. ur lower decade segments of a ladder network The buffer amplifier produces a Vp signal from to prevent loading of by ladder switching cur rents The ladder decades are voltage dividers weighted in fifteenths for control by digital words from 0 to 15 8 4 2 1 The relative position of each decade with respect to the ladder output determines the significance of each decade s contribution to the total ladder network output 6 16 BUFFER AMPLIFIER The Buffer Amplifier com posed of Q1 through Q3 is a unity gain amplifier connected through CR1 to function as a voltage follower This circuit produces a Vp signal that is applied to the ladder driver cir cuits Output impedance is sufficiently low from dc to 100 kHz to prevent loading by ladder switching currents 6 17 LADDERS The four lower decade ladders con sist of through R18 and R119 through R12 Each decade of the ladder is formed essentially by four resistors which in combination weight the division factor of each decade in fifteenths A simplified diagram of a typical de cade ladder is shown in Figure 6 1 1 20 75 OUTPUT Vo v Vo IS AVAILABLE IN VOLT STEPS Figure 6 1 LADDER DECADE SIMPLIFIED 6 18 MAINTENANCE PROCEDURES 6 19 Maintenance procedures for the Model 4210A 07 are the same as those given in Section 4 of the manual A resolution check of the 07 Option is given in the following paragraphs 6 20 This p
230. us compensating for any I R drop in the output power leads Figure 2 6 shows an example of re mote sensing load connections NOTE The two jumpers on the barrier strip which bus output must be removed for remote sensing When remote sensing always use a twisted pair P of insulated wire from the output and sense terminals to the load A maximum of 0 35 24 volts at 25 C decreasing 0 002 volts per degree C at higher temperatures is allowable between either output terminal and its corresponding sense terminal The leads between the output and sense terminals and the load must be large enough to carry the load current of up to 0 5 ampere and the sense current of about 1mA without exceeding this voltage JUMPER REMOVED FOR REMOTE SENSING OUTPUT HI SENSE HI SENSE LO OUTPUT LO GUARD CHASSIS 77 JUMPER REMOVED FOR REMOTE SENSING POWER SOURCE TWISTED PAIR WIRES Figure 2 6 REMOTE SENSING CONNECTIONS 2 20 Ground Connections 2 21 5515 terminal is provided at the rear panel This terminal is directly connected to the chassis of the power source and earth ground through the ground pin on the input power plug If grounding of the load is desired this terminal provides a convenient connection to earth ground When a guarded output explain in paragraph 2 22 is not desired this terminal should be connected to the GUARD terminal 2 22 Guard Connections 2 23 The power source is equ
231. utput current will pass through R43 to the output as above but the output voltage polarity is zero or negative by definition Under this condition negative voltage more than 0 6V at the output will turn on CR25 which supplies base current for Q34 through R41 from common and adds to that supplied from the voltage drop across R43 Therefore the base current is dependent on both sinking voltage magnitude and output current Current limiting in milliamperes is equal to 500 4 5E ut 3 125 When the A8 Programmable Curremt Limiter 06 Option is installed I LIMIT inputs are applied to terminals 2and U of Pl These inputs clamp the maximum base drive to both sections of the Output Stage in a similar manner to Q34 thus limiting the maximum output current at a level determined by the input limit commands 3 126 CURRENT LIMIT DETECTOR 3 127 The Current Limit Detector produces an I LIMIT 0V command at terminal 14 of P1 whenever a source of sink limit condition exists Circuitry consists of Q14 through Q16 Q18 and Q19 Positive output section limiting is detected by Q14 Limiting in the negative output section is detected by Q18 Transistors Q15 Q16 and Q19 are drivers 3 128 Under normal operating conditions Q14 and Q18 are turned on by conduction of Q13 and Q17 in the Driver Transistors Q15 and 019 are switched off by conduction of Q14 and 018 thus turning 016 on and producing an I LIMIT 5V command at terminal 14 of P1 Sh
232. ve true logic achieved by jumpering pad J to K and pad L to M If positive true logic is desired jumper pad J to pad L and pad K to pad M Also jumper pad F to pad H 609 30 BCD control word logic sense may be either positive true or negative true as determined by jumpering at pads N P and R The standard configuration is negative true logic established by jumpering pad P to pad N If positive true logic is required jumper pad N to pad R Figure 609 4 NOTE Positive true logic employs 5V for logic 1 and 0V for logic 0 609 31 BCD VOLTAGE SOURCE POLARITY 609 32 Voltage source output polarity is selected by a polarity data bit The polarity bit may be placed in either an 18 bit data word or an 8 bit control word depending on the data word length as selected through jumpering pads S T and U With pad T jumpered to pad U the data word will contain 16 bits the Polarity bit will be the first data bit in the 8 bit control word In the standard configuration pad T is jumpered to pad S and the data word contains 18 6115 with the Polarity bit being bit 17 In either case jumper pad B to pad E Refer to Figure 609 4 and 609 6 16 BIT DATA WORD 8 BIT CONTROL WORD pretatur N NEES MSD 250 380 LSD POLARITY BIT OR STANDBY OPERATE BIT OUTPUT RANGE BIT EXTERNAL REFERENCE MODE BIT CURRENT LIMIT RANGE BIT 4 BIT CURRENT LIMIT MAGNITUDE Figure 609 6 BCD
233. voltage Vo that is maintained by the current through Re as determined by the ratio of VREF over Cue Ry 3 5 BLOCK DIAGRAM ANALYSIS 3 6 The following paragraphs describe the major cir cuit functions of the Model 4270A A block diagram of the power source including all options is shown in Figure 3 2 3 7 The Isolated Control Logic provides isolation and storage of the digital inputs A STROBE input is required for any data transfer The assembly also provides READY NOT READY and CURRENT LIMIT FLAG outputs Inter nal commands from the A6 LOGIC control polarity range magnitude sample and hold and current limiting of the out put These commands except sample and hold are also applied to the A7 Display where visual status is provided on the front panel 4270A Section 3 Theory of Operation 38 All operating voltages as well as the internal refer ence voltage VREF are produced in the A2 Power Supply and the A10 Connector Board Commands from the A6 Logic determine the polarity of VREF applied to VREF bus line A POL command produces VREF and a POL command a Vppp Presence of either or both EXT REF and STDBY commands disable the internal VREF 3 9 The A4 External Reference 03 Option pro cesses the external reference input voltage The magnitude of this voltage can be from 0 to 14 5V dc or peak ac and have a frequency from dc to 30 kHz Presence of an EXT REF command disables the previously d
234. y is in stalled perform the following adjustments a 4 25 4 26 Connect a shorting jumper between the EXT REF HI and EXT REF LO input terminals on the rear panel barrier strip Depress EXT REF A decade 8 4 2 1 and STROBE buttons Check that EXT REF and A decade 8 4 2 1 and 1 indicators on d Adjust A4 EXT REF ZERO for an output of OV 10 d Remove the shorting jumper from the rear panel barrier strip Apply a 10Vac 0 02 400 Hz signal to the EXT REF HI and LO terminals Measure and record the actual ac voltage applied to these terminals with an ac voltmeter Recorded value Disconnect the ac voltmeter and connect it to the OUTPUT HI and LO terminals on the same barrier strip Release A decade 4 and 1 buttons and check that the A decade 8 and 2 indicators are on Adjust A4 EXT REF GAIN for an ac output that is within 500uV of the value recorded in step e Release A decade 8 and 2 buttons and depress STROBE Check that the output is OV and that all decade indicators are out Disconnect the ac signal source and set the ac volt meter to measure dc volts Current Limiter Adjustment 06 Option Adjustment of the A8 current limiter when installed i is performed as follows i Turn off the instrument and install a 102 1 20W resistor between the OUTPUT HI and LO terminals Leave the dc voltmeter connected Set the top dust cover in place turn on the instru ment and r
235. y not be installed Res met flm 7 15k 1 1 8W 260356 MFF1 87R15 Switch slide dpdt line voltage 234278 XW1649 Switch toggle dpdt power 115113 MST215N Transformer power See Figure 5 1 308239 308239 IC operational amplifier 271502 LM301A IC reference amplifier Res met flm selected value Matched Set 301846 Res ww 12k 0 05 W Res ww selected value IC operational amplifier selected 225961 225961 IC operational amplifier 321224 SG8178T Terminal barrier strip 295212 TYPE 140Y Fuse holder 160846 342004 Guard 297044 297044 Socket IC 14 contact 276527 TSA 2900 14W Heat sink Q12 amp Q15 104646 NF207 Jumper terminal barrier strip 283713 422 13 11 013 Ref Amp Set 301846 301846 4270A Figure 5 3 POWER SUPPLY PCB ASSEMBLY MFG DESCRIPTION PART NO PRE AMPLIFIER PCB ASSEMBLY 332924 332924 Figure 5 4 Cap mica 1300 pF 5 500 182881 DM1951325 Cap mica 130 pF 5 500V 266205 DMISF131J Cap mica 43 pF 1 500V 277202 DM15EA30F Not used Cap mica 1000 pF 5 500V 148387 DMI9F101J Cap mica 330 pF 5 500V 148445 DMISF331F Cap elect 20 uF 25 10 50V 106229 G0D206G05CC4 Cap elect 50 uF 50 10 25V 168823 ET470X25A7 Cap mica 3600 pF 2 500V 176644 DMI9F360G Cap mica 3300 pF 2 500V 192518 DM19F330G Cap mica 150 pF 5 500V 148478 DMISF151J Cap cer 0 05 20 100V 149161 55C23A1 Cap mica 22 pF 5 500V 148551 1 15 2207 Diode silicon 75

Fluke 4270A User's Manual

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