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Содержание DM 502

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Страница 2: ...Tektronix Inc P O Box 500 Beaverton Oregon 97005 Serial Number 070 1726 00 TEKTRONIX D IVI 502 DIGITAL IVI U LT I IVI ETE R INSTRUCTION MANUAL First Printing Aug 1974 ...

Страница 3: ...ssure you the fastest possible service Please include the instrument Type Number or Part Number and Serial Number with all requests for parts or service Specifications and price change privileges reserved Copyright 1974 by Tektronix Inc Beaverton Oregon Printed in the United States of America All rights reserved Contents of this publication may not be reproduced in any form without permission of T...

Страница 4: ...r as a Temperature Sensing Device 1 5 Accurate Current Source 1 6 Specifications 1 6 SECTION 2 THEORY OF OPERATION Introduction 2 1 Attenuator and Input Switching 2 1 AC Converter 2 1 DB Converter 2 1 Ohms Converter 2 2 Temperature Measurement Circuitry 2 2 Clock 2 3 Analog To Digital Converter 2 3 Display 2 5 Power Supplies 2 5 SECTION 3 ELECTRICAL REPLACEABLE PARTS LIST SECTION 4 SERVICE INFORMA...

Страница 5: ...RA 502 nalm mn ...

Страница 6: ...nd current 1000 V dc and the 2 A do current range In overrange the display blinks and the most significant digit issuppressed Upon exceeding the available 50 overrange a 1 appears in the most significant digit position Display readings are invalid beyond this point REV A OCT 1974 INTRODUCTION Section 1 113M 502 OPERATING INSTRUCTIONS Interlaced bcd output 1 3 2 4 referenced to the low input is ava...

Страница 7: ...ar Fig 1 1 DM 502 Installation and removal OPERATING CONSIDERATIONS interface connector The Rear Interface Connector Assignments page in the Service Section at the rearofthis manual gives data on the various connections Only the Temp Out Temp Gnd and HI and LO inputs are factory wired Jumper holes are provided for making the desired bcd output connections See the wire locations illustration in the...

Страница 8: ... 0 636 0 707 or 0 9 Multiply the DM 502 readout by 0 9 to obtain the average value of a sinusoidal input voltage or current Operating Instructions DM 502 Fig 1 2 Locations of dB reference jumper input impedance jumper and hard wired C or F component or wire changes Temperature Measurements Connect the P6430 or other sensing device to the connector marked TEMP PROBE Use care to align the connector ...

Страница 9: ... input is more positive With the input shorted the display reads zero one count The Temp Out terminals atthe rear interface connector are always connected to the output of the temperature circuitry This feature provides continuous temperature monitoring capabilities in C even while using other functions of the DM 502 To avoid a momentary scale change when a recorder or other device is connected to...

Страница 10: ...0 logio 2 and 10 logio P REV A OCT 1974 Operating Instructions DM 502 For calculations substitute the reference voltage or current listed as the denominator Temperature Measurements With the P6430 probe connected to the front panel connector labeled TEMP PROBE set the range function switch to the F or C in the TEMP position Apply the probe sensor tip to the device being measured For optimum temper...

Страница 11: ...MMON MODE REJECTION 100 dB at dc 80 dB at 50 or 60 Hz with a 1 kO unbalance NORMAL MODE REJECTION 80 dB at 50 or 60 Hz Accurate Current Source ELECTRICAL SPECIFICATIONS The OHMS positions on the range function switch provide accurate typically 0 2 constant currents at the INPUT terminals See the Ohmmeter specifications for the value of the currents and maximum voltages across the INPUT terminals f...

Страница 12: ...NGES 200 jA 2 mA 20 fnA 200 mA 2 A ACCURACY 0 2 of reading 1 count RESPONSE TIME 1 2 s INPUT IMPEDANCE DC AMMETER 0 2 V 0 1 S2 Range Setting except 2 0 kQ on the 200 pA range MAXIMUM INPUT CURRENT ON ANY RANGE Fused at 2 5 A AC AMMETER 200 IZ range 0 5 1 count 0 1 S2 Current 200 pA 2 mA 20 mA 200 mA 2 A 2 kQ through 2 MQ ranges 0 5 1 count dB 40 20 0 20 40 Reference is 1 mA dbV or 20 MQ range 1 0 ...

Страница 13: ...NPUT CURRENT ON ANY RANGE POWER CONSUMPTION Fused at 2 5 A 6 5 watts THERMOMETER With any P6430 probe 81 C or 14 4 F With instrument calibrated to probe 2 C or 3 60 F Up to 1 kV may be safely applied to the front panel INPUT terminals 350 Vto the rear input connectors when the range function switch is in the TEMP positions ENVIRONMENTAL SPECIFICATIONS REV A OCT 1974 Display Frequency Maximum Readi...

Страница 14: ...es conduct opening the fuse before the voltage across the higher value shunts damage them Lamp RT100 protects shunt R142 in the lowest current range and the Ohms Converter REV A OCT 1974 THEORY OF OPERATION Ac Converter Section 2 DM 502 THEORY OF OPERATION In the ac measurement modes the ac signal is applied to fet Q165 CR165 and CR166 protect 0165 from over voltage Q170 connected from the source ...

Страница 15: ... of the current setting resistance is always equal to one half of the full scale measurement value except on the 200 f2 range as shown on the range 2 2 Fig 2 1 Simplified diagram of Ohms Converter function switch The 200 Q scale uses 1 kQ and the gain of the analog to digital converter is increased by a factor of ten R130 adjusts the gain of the amplifier to produce one volt across the current set...

Страница 16: ...peration DM 502 U290 comprises the analog to digital converter and U335 contains the necessary control logic U290 contains the integrating amplifier comparator auto zero amplifier and input buffer amplifier See Fig 2 2 C300 is the integrating capacitor The clock frequency is divided by the time base counter into groups of 6144 pulses Measurement takes place for 4096 of these pulses and automatic z...

Страница 17: ...output was high during the preceding set of eight clock cycles This is shown as duty cycle A in Fig 2 4 When the comparator output is low in clock cycle seven the up down logic is up for seven cycles and down for one cycle during the following eight clock cycles This is shown as duty cycle B Fig 2 4 shows the result of these actions on the integrator output 2 4 A counter synchronous with the up do...

Страница 18: ... to a low and connected to the cathodes of the ones segments in the most significant digit module The contents of the static latches are multiplexed to the data output buffers The data output format is an interlac ed scan of digits one three two and four Four is the most significant digit With a count of 2000 or greater in the counter 100 of full scale the 3 1 2 digit display blinks off during the...

Страница 19: ...t you concerning any change in part number Change information if any is located at the rear of this manual SPECIAL NOTES AND SYMBOLS X000 Part first added at this serial number 00X Part removed after this serial number ITEM NAME In the Parts List an Item Name is separated from the description by a colon Because of space limitations an Item Name may sometimes appear as incomplete For further Item N...

Страница 20: ...AN YSIDRO WAY SANTA CLARA CA 95051 28480 HEWLETT PACKARD CO CORPORATE HQ 1501 PAGE MILL RD PALO ALTO CA 94304 34553 AMPEREX ELECTRONIC CORP COMPONENT DIV 35 HOFFMAN AVE HAPPAUGE NY 11787 49956 RAYTHEON CO 141 SPRING ST LEXINGTON MA 02173 50522 MONSANTO CO ELECTRONIC SPECIAL PRODUCTS 10131 BUBB RD CUPERTINO CA 95014 56289 SPRAGUE ELECTRIC CO NORTH ADAMS MA 01247 58474 SUPERIOR ELECTRIC CO THE 383 M...

Страница 21: ... B019999 CAP FXD ELCTLT 4 7UF 20 50V 56289 196D475XOO50KA1 C197 290 0536 00 B020000 CAP FXD ELCTLT 10UF 20 25V 90201 TDC106MO25NLF C198 290 0536 00 B010100 B019999 CAP FXD ELCTLT 10UF 208 25V 90201 TDC106MO25NLF C198 290 0527 00 B020000 CAP FXD ELCTLT 15UF 20 20V 90201 TDC156MO20NLF C199 290 0512 00 B010100 B019999 CAP FXD ELCTLT 22UF 20 15V 56289 196D226XO015KA1 C199 290 0535 00 B020000 CAP FXD E...

Страница 22: ...ON 30V 150MA 07910 1N4152 CR240 1 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR334 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR410 152 0585 00 SEMICOND DEVICE SILICON BRIDGE 75V 75MA 15281 W02M CR430 152 0585 00 SEMICOND DEVICE SILICON BRIDGE 75V 75MA 15281 W02M CR435 152 0107 00 SEMICOND DEVICE SILICON 375V 400MA 80009 152 0107 00 DS350 150 1022 00 LAMP LED RED 50...

Страница 23: ...79 321 0287 00 RES FXD FILM 9 53K OHM 1 0 125W 75042 CEATO 9531F R180 311 1563 00 RES VAR NONWIR IK OHM 208 0 50W 73138 91A 10000M R181 321 0066 00 RES FXD FILM 47 5 OHM 1 0 125W 75042 CEATO 47R50F R185 321 0193 00 RES FXD FILM IK OHM 18 0 125W 75042 CEATO 1001F R187 321 0193 00 RES FXD FILM IK OHM 1 0 125W 75042 CEATO 1001F R190 315 0104 00 RES FXD CMPSN 100K OHM 5 0 25W 01121 CB1045 R192 315 010...

Страница 24: ...B1055 8291 315 0104 00 RES FXD CMPSN l00K OHM 5 0 25W 01121 CE1045 8293 321 0978 01 RES FXD FILM 11 02K OHM 0 5 0 125W 91637 MFF1816G11021D R295 311 1565 00 RES VAR NONWIR 250 OHM 20 0 50W 73138 91A250ROM R297 321 0385 00 RES FXD FILM l00K OHM 1 0 125W 75042 CEATO 1003F 8300 315 0184 00 RES FXD CMPSN 180K OHM 5 0 25W 01121 CB1845 8302 315 0104 00 RES FXD CMPSN l00K OHM S 0 25W 01121 CB1045 8304 32...

Страница 25: ...M 58 0 25W 01121 CB5625 RT100 150 0131 00 LAMP INCAND 0 025A 120V 71744 120PS RT220 307 0472 00 RES THERMAL l00K 58 NTC DISC 15454 lOE104 JS 8100 260 1208 00 SWITCH PUSH DPDT 71590 2KABO10000 359 5110 263 1106 00 ACTR ASSY CAM SW TIME C M 80009 263 1106 00 5200 260 1332 00 SWITCH PUSH 80009 260 1332 00 T410 120 0958 00 XFMR PWR SDN 80009 120 0958 00 U120 156 0197 00 MICROCIRCUIT LI 5 TRANSISTOR AR...

Страница 26: ...n MIL STD 806B in terms of positive logic Logic symbols depict the logic function performed and may differ from the manufacturer s data The following special symbols are used on the diagrams D Pl0 circuit board External Screwdriver adjustment External control or connector Clockwise control rotation in direction of arrow Refer to diagram number indicated in diamond Refer to waveform number indicate...

Страница 27: ...ocations Make ad justments at an ambient temperature between 20 C and 30 C 68 F to 86 F Allow 20 minutes warmup time Recommended recalibration interval is every six months Sometimes overall accuracy of the DM 502 on ranges affected by a specific adjustment may be improved by compromising the adjusment within specifications from the exact setting called for in this procedure Checks and Adjustments ...

Страница 28: ...SC1 3 50 20 V Ac Comp Step 14 R155 500 V Ac Gain Step 14 C155 500 V Ac Comp INTERNAL ADJUSTMENT PROCEDURE Step 7 R280 Gain Step 8 R270 Offset Add Step 1 2 Floating Ground TP5 ...

Страница 29: ...o the input terminals Adjust R175 2 V Ac for a display reading of the applied voltage one count 13 Adjust 20 V AC Compensation Set the range function switch to the 20 AC VOLTS position Connect a known ac voltage near 19 volts rms at a frequency of 1 kHz to the HI and LO binding posts Adjust C150 20 V Ac Comp for a display reading of the applied voltage one count Now switch to the 200 AC VOLTS posi...

Страница 30: ...clarity 5D id SD To 15B One To 21B BCD 2 To 20B BCD 8 To 19B Transfer il To 26A 3rd SD 0 To 25A LSD 1 ...

Страница 31: ...LOCATIONS FOR USER WIRED REAR INTERFACE CONNECTIONS 9 1011 To 14B Polarity To 26B MSD To 25B 2nd SD Z 7 2 1 F77 77 3 2 1 12 13 14 1 5 161 To 15B One To 21B BCD 2 To 20B BCD 8 To 19B Transfer To To ...

Страница 32: ...put or Pin Pin Output or Active mended Remarks Loads Level Input B A Input Level Leads Remarks Floating Decimal Common H Out Use as common for all data out wts 0 I MSD Out 0 2nd SO Out Chassis Temp Gnd Temp Out 10 mV Gnd Use 310 kf load H BCD Out 2 21 21 I L Multiplexed L One Out 1 15 Polarity H Out 14 14 25 VAC 25 VAC 13 13 Winding Winding 33 5 V filtered DC 12 12 Collector Base lead of PNP 11 le...

Страница 33: ...the sensing transistor to a do voltage proportional to the measured tem perature db Converter Converts do output voltage from the ac converter to a logarithmic output voltage Ac Converter Rectifies ac voltages in the ac modes for applica tion to the integrator or analog to digital con verter 25 Vac 25 Vac Ac Voltage and Current Dc Voltage Current and Resistance O O Temp 0 ZO zz m i 0 0 i D OZ Mm y...

Страница 34: ...ivers Activates the appropriate display module Display Modules Each module contains seven segments represented as cathodes of light emitting diodes as well as a decimal point The segments are arrang ed to form numbers from zero to nine When the anode drivers raise the anodes to the un regulated driver voltage the modules are lighted The most significant digit module displays the polarity sign as w...

Страница 35: ...urrent or resistance May be floated 1 kV above ground Ground Binding Post Chassis Ground CONTROLS AND C TEMP PROBE Connector Mates with P6430 probe con nector Also used with other temperature sensing devices NNECTORS DM 502 07 i r Range Function Switch Selects all ranges and functions Button in selects dB readout in ac modes Button OUT transfers input to front panel Button in rear inter face conne...

Страница 36: ... N n N C410 C412 345 1 1 tt Q365 Q350 Q355 Q360 P350 P340 21 El LMI E m c UI 0 U N p N p _ 7 77 71 R268 N N I R270 C N N a 1f U I N N N N N N N N N W N N N tt I IO n N 0 N U v WVG m U250A r N U i O i D U250B is N _AL N N I M n IN N ttI N N N l0 U N N U U U c i Tiy 1d IL cli 0 N n O N N cli N O O O a ea 00 N O tt U U MAMA to co N I I N a a a O 0 N M f N V V tt tt M c tt tt tt tt U U _ N N ...

Страница 37: ...NOTE COMPONENTS SHOWN WITH DASHED LINES AR PARTS LOCATH LOCATED ON BACK SIDE OF BOARD U120B U120C U210 U120 RT U120 ...

Страница 38: ...C5 R145 B4 R146 B4 R147 C4 R155 B5 R157 B5 R165 E4 R168 F4 R170 F5 R172 F5 R174 F5 R175 F5 R179 F6 R180 E6 R181 F6 R185 F6 R187 F6 R190 E5 R192 F6 R197 F6 R198 F5 R199 F5 R203 G5 R205 H5 R208 H5 R210 G5 R212 G5 R215 H5 R217 G5 R218 G5 R220 H6 R224 H6 R225 H6 R230 M5 R232 M4 R235 M5 R237 L5 R240 M4 R243 L4 R245 L4 R247 K2 R250 K2 R251 K2 R255 M3 R257 L3 R260 M4 R265 L4 R267 L2 R268 L2 R269 L2 R270 ...

Страница 39: ...9 2 IK F CI00 oza R120 906 26 R230 IOK Q230 170 01 1214 1214 L___________________________ CR230 Is V 1214 R 170 IK I C154 1514 I5V P155 RI57 10 7K 8 Ql 70 C155 500 VAC 2 18 COMP 500 500 VAC GAIN 1514 R 237 IOK Q235 CRE35 15v REV 5 NOV 1974 11 02K CR237 2v CA L R175 250 R2d 100 R243 100K R2 10 MIAMI G14 U 2 OD 13 YR120 w C120 6 214 I I IOt4F 12v Z7 L 29 34 CRIG5 RIG8 6 8K CI 33 1 1214 R172 I 91 810...

Страница 40: ...95 8197 7 32K LQuEi U290 10 SP 00 DB ___ U24 l R lat9s FaM 1 RZ03 P212 3 Q260 6263 10 F 1 Q245 IZV RE 18 _20d8 3 24K 3f 4 0220 ISV R265 G8 K 15 4 AT TENUATORS CONVERSION CIRCUITS01 8z_74 6 c26 3 V250B 001 CZ87 001 To R2so 5110 45 24AE I OUTF 24B GND I R IQ 910K ey R271 665 R27T 133K R279 1 87K c2 0 VR270 OFFSET R280 7 F l 2V 8270 R282 R 75 500 100 249K 432K 8269 768 syo QQ K R26o R268 F 1 I OOK 20...

Страница 41: ... R290 R291 IM TOOK DM 502 VV290 NOTE U5ED ONLY WITH OPTION C320 IOuF C325 22uF TO 8203 I2V ZVDC PARTIAL At MAIN BOARD C316 0 1 R 3Z5 20 CLOCK 12V R310 806 0312 VR310 o 2V 4 7uF C315 5 5 65 A D ZERO 5v TP I t5 V 6 12V L R380 10 2E 5 NOJ 1974 5D U34 741c 2 U3 74 6 UN U3 741e 8 Q3 7J ...

Страница 42: ...4 6 2 3 DASD LSD L 4 R380 10 4 I I I I o f I _ 52 0 00 R369 4 7K 5V 8375 U345A 7416 2 5110 5V 114 0345 S N 7416 R350 1 5K 9V Q370 U5E R372 7416 zoo 10K 13 1 Z Q375 U345F 8377 7416 200 R332 200 49V 8370 zoo Q350 P350 P350 P352 5V 16 PARTIAL AL DISPLAY BOARD_ P350 P352 1NTEGRATOR D CONVERTER DISPLAY U340 7447 P ANODE 05 36 5 NS g 13 74 FMB Ei C Y T2 P340 P342 05350 D5355 P5360 OS365 ...

Страница 43: ...aoo auu MmmMMmMMW mommoomms MMao aaoMOMMMu MMMMMMMMMM MEN mmoom oaoMouMEW MMMMMMMMME poNglimmim MEMoM ooomammms MENEM iMMONaaaao oao0aMMEW MEo0o0noo0 mosommum MUMOMMEME mnMaoMMo mommoommo ONEft EMODOMMOOK MENEM iMMnMOMMooM o0 iMMUMOMMnK u oo Mc00ooMEo SOMME iiionMMn0o ooMUMMMn i luo0a MOMM uamnooam aamamumo OMMOMMMMS _oMml MMooa momammmom ooaMu of MEM i o Mooa limamommuo ouoMuMM MMMM MMaMoaioaoM o...

Страница 44: ...3 I 200 130 1 1 KV 1313 0 13 500 40 _ M 13 1313 0 0 0 0 IV 22 I n n 0 9 0 130 O 13 a 0 AC V _ a I OO 13 0 13 2 2o 0 0 0 200 MV 40 __ Oa E 1 00 0 7 0 13 I 13O C7 0O 00 13 E 200 20 _10013 _ 001 0 13 0 0 20 0 AC mA 00 13 13 13 2 20 1313 13 0 1313 13ala 0 NO 130 13 0013 013 O O O zoo 4o 200 A O O O 000 r omm 2 13 O 0 10 13 II7II 0 II 20 DG m 13 a 113 O u 0130 00 213 1313 IO 13 131300 O0 QA OO 1313 13 ...

Страница 45: ... Attaching parts must be purchased separately unless otherwise specified ITEM NAME In the Parts List an Item Name is separated from the description by a colon Because of space limitations an Item Name may sometimes appear as incomplete For further Item Name identification the U S Federal Cataloging Handbook H6 1 can be utilized where possible INCH ELCTRN ELECTRON NUMBER SIZE ELEC ELECTRICAL ACTR A...

Страница 46: ... QUINCE ST ESCONDIDO CA 92025 45722 USM CORP PARKER KALON FASTENER DIV 1 PEEKAY DRIVE CLIFTON NJ 07014 58474 SUPERIOR ELECTRIC CO THE 383 MIDDLE ST BRISTOL CT 06010 71590 CENTRALAB ELECTRONICS DIV OF GLOBE UNION INC 5757 N GREEN BAY AVE MILWAUKEE WI 53201 73743 FISCHER SPECIAL MFG CO 446 MORGAN ST CINCINNATI OH 45206 74445 HOLD KROME CO 31 BROOK ST WEST HARTFORD CT 06110 77250 PHEOLL MANUFACTURING...

Страница 47: ...CT OOOOA RA0302 ATTACHING PARTS 210 0255 00 1 TERMINAL LUG 0 391 ID INT TOOTH 80009 210 0255 00 17 426 0681 00 2 FR PUSH BUTTON GRAY PLASTIC 80009 426 0681 00 18 333 1976 00 1 PANEL FRONT 80009 333 1976 00 333 1976 01 1 PANEL FRONT OPTION 2 80009 333 1976 01 ATTACHING PARTS 19 210 0405 00 2 NUT PLAIN HEX 2 56 X 0 188 INCH BRS 73743 2X12157 402 20 210 0259 00 1 TERMINAL LUG 0 099 ID INT TOOTH SE 80...

Страница 48: ...1 0604 00 45 X 0 365 INCH LONG CONTACT ELEC 0 025 SQ 80009 131 0604 00 58 131 0608 00 26 INCH LONG CONTACT ELEC 0 365 22526 47357 59 1 TRANSFORMER SEE T410 EPL 60 407 1640 00 1 H BRACKET XFMR 0 826 WD 2 375 L 1 781 80009 407 1640 00 ATTACHING PARTS 61 211 0507 00 2 X 0 312 STL SCREW MACHINE 6 32 INCH PNH 83385 OBD 62 210 0457 00 2 X 0 312 INCH STL NUT PLAIN EXT W 6 32 83385 OBD 63 260 1208 00 1 SW...

Страница 49: ... ELECTRICAL 2 WIRE RIBBON 23499 TEK 175 0825 00 175 0826 00 FT WIRE ELECTRICAL 3 WIRE RIBBON 08261 TEK 175 0826 00 ACCESSORIES 070 1726 00 1 MANUAL TECH INSTRUCTION NOT SHOWN 80009 070 1726 00 010 6430 00 1 PROBE TEMPERATURE NOT SHOWN 80009 010 6430 00 003 0120 00 1 TEST LEADS PAIR NOT SHOWN 80009 003 0120 00 REPACKAGING 065 0151 00 1 CARTON ASSEMBLY NOT SHOWN 80009 065 0151 00 ...

Страница 50: ...Q U 63 v I A I ...

Страница 51: ...49 DM 502 ...

Страница 52: ...mmediately into printed manuals Hence your manual may contain new change information on following pages A single change may affect several sections Sections of the manual are often printed at different times so some of the information on the change pages may already be in your manual Since the change information sheets are carried in the manual until ALL changes are permanently entered some duplic...

Страница 53: ... 5 V 33 5 V filtered DC 6 filtered DC Collector Emitter ad of NPN TM 500 7 lead of NPN 8 rtes Pass barrier Series Pass slot Base Not Used B 5 lead of NPN Series POs 17 5 VAC 5 5 17 5 VAC winding winding 11 5V 4 4 T 5V common common 11 5 V 3 3 11 5 V Common common 11 5 V 2 2 11 5 V filtered OC filtered OC 25 VAC 1 125 VAC winding 1 winding B A Rear view of plug in The outputs must be buffered befor...

Страница 54: ...I I3 T Fn F CRIST v CHANGE TO A1 670 3495 01 CKT BOARD ASSY MAIN Al 670 3694 01 CKT BOARD ASSY MAIN OPTION 2 0197 290 0536 00 CAP FXD ELCTLT l0 tF 20 25V C198 290 0527 00 CAP FXD ELCTLT I tF 20 20V C199 290 0535 00 CAP FXD ELCTLT 33 F 20 IOV R198 321 0202 00 RES FXD FILM 1 24K OHM 1 0 125W R199 321 0202 00 RES FXD FILM 1 24K OHM 1 0 125W REMOVE C429 283 0279 00 CAP FXD CER DI 0 001 tF 20 3KV ADD C...

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