Philips PM2517E User Manual Download

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Summary of Contents for PM2517E

Page 1: ...G I s d Automatic Digital PM 2517E o onu PM 2517X o 0 0 Multimeter Service Manual 949947501311 790507 l l l r O l l l I l l I l PHITIPS ...

Page 2: ...47501311 Servicenoie SME83 New versionof OQ 0063 In the newversion of the OQ 0063pin 17 is internollyconnected Usingihe newOQ 0063in ihe eorlierversions of the PM 2512 E DMOI600 D MO24926ondX DM 0l 600 DM0l 3051 results in molfunctionning of the Q function Theorderingnumberof the OQ 0063 5322209 85886remoinsthe some ConcernServicewilldeliver only lhe newversionof the OQ 0063 Toqvoidproblems with t...

Page 3: ...il t t t Ij I New OQ 0063 DM02 4926 onwords DM0l 3051 onwords old oQ 0063 DM0l 600 DM024926 DM01600 DMOI3051 NEw P C BOARD s r 2 7 1 7 T 1 I l l oo0063 oo0063 oLD PC BOARD ...

Page 4: ...oct on ronge commonds After switching OFF ond ON ogoin or to the functionsV Vn mA ormArw the instrumentfunctions correctly ogcr in Couse Storting problemsof the OQ0063 The problemonly occurswith new LC s with weeknumberT9l9ond higher refer to sME 83 Remedy PM25I7EDMOI 600 DM024926 PM2stTX DM01600 DM0l 3051 OnlywhentheOQ0063 is reploced by o newtype weeknumber 79 19 thefollowing modificotion mustbe...

Page 5: ...hortcircuii the spots whereR4l3 hqsbeen removed Mounl copocitorC404on the p c boordogoin seefigure Mountthe new copocitorC407 15 p f on the p c boordogoin seefigure t t I t r I r I a I r 5 r 1 t r r r tJ c404 F n R4 1 3 short O L D PM2517EDM04 10491 onwqrds PM2517XDM04 8611 onwords Themodificqtion hosolreodybeenbuilt R4lB R 68ka CRl65322lll 30291 C407 C l5p F 10V532212414036 wrres in cnehole clrcu...

Page 6: ...9478 10811 l 1 I oncerns l Startingproblems 000063 l J Thepolarity of thenewcapacitor C407isdrawnincorrectly The drawing of the l C andthe I circuitdiagram mustbechanged to show Pin17of the000063 4401 _ J pin 15of the 000063 A4ot l ...

Page 7: ...the mA ronge Errordescript ion ln the mA rongethe PM 251Z hqso Remedy predeflection of 2 digitsof shortcircuited input Cut trockwhich is situotedunderthe OQ0064 A102 ot the conducior sideof the p c boord seefigure Interconnect pin24 of the OQ0059 D101 ondpin 7 of the OQ0060 Al0l seefigure Fromseriqlnumber DM 06 15321 PM2517Eond DM 06 14986 PM2517X on the modificotion hosolreodybeenbuilt in by the ...

Page 8: ...interconnection strip The dimensions of the new LX display height differ from the excisting display The newrubberinterconnection strip hasbeenmounted to ease the mounting In additionto the new LX displaya wire issoldered between the soldering bulbon the LX displayand Nl pin3 9499478 10911 l o E DM01600 Ot 402 4926 x Dt 40 l 600 DM01305 E DI 402 4926ONWAB DS x DM013051 Dr 407 17361 X DI 40717361ONW...

Page 9: ...25 5322263 54014 sT 2541 A O D I T I O N A L W I R E B E T W E E NS O L O E R I N G O N T H E L X O I 5 P L A Y N 1 P I N3 srzoos I In the new arrangement the rubberroller 3 andtape 4 arenot required To replace the LX display referto page1l2 of the Plvl2517Instruction lvlanual 2 How to proceed with old instruments PM2517X DM0l 600 DMOT 17361 TheexistingLX display532213O94011 isobsolete when the LX...

Page 10: ...oC with openinput o Rx 800f 2 it may happen that the 000063 doesnot start Thiscanresultin the followinqerrors Displayindicates overload Displayindicates a too low reading In bothcases the Plvl2517 doesnot reacton range commands After switching OFF and ON againor to the functionsV Vrv mA or mA theinstrument functions correctlyagäin Cause Starting problems of the O00063 The problemonly occu rswith n...

Page 11: ...19671 Plvl2s17XDl 4O l 3051 onwards In theseinstruments the modificationasmentionedin Service noteSME84arealreadybuilt in Forthe correctmodificationproceed asfollows Remove resistor R418 SME84 Replace capacitorC407 15uF 1OV 5322124 14036 by a capacitor of 22nF 4822122 30103Ceramic plate placea resistor of 220 kS CR16 5322 11I 30302 b tw en pin 1 of the OO0059 DS1 andpin 6 of the 000063 Clock lC4O2...

Page 12: ...the international standards the text on the topcoverandthe batterycover hasbeenmodified The orderingnumbers for the topcoverandbafterycover with the newtextsare Topcover 5322 44794558 Baftervcover E X 5322 44364029 TopcoverX 532244794537 an Corrections of the Service manual ordering number9499475 01311 Page 65 5 2 Adjustingtable NO 2 ADJUSTING ELEMENT Adj resistorR 107 lMR25 1 Ä E48series Shouldbe...

Page 13: ... I R C U I T D E S C R I P T I O N General Principle of operation Detailedcircuitdescription Specifications of C susedin the Pl il 2517 ACCES General Dismantling the PM2517 Replacing parts C HE C K I N G A N DA O J U S T I N G General Adjusting table 5 5 7 8 6 T R O U B L E S H O O T I N G 6 1 Power supply 6 2 Display 6 3 ADC 6 4 V attenuator 6 5 Ranging 6 6 V ranges 6 7 f 2ranges 6 8 A ranges 6 9...

Page 14: ...ques rl t t t t _ Note Bemerkung Remarques Thedesignof thisinstrument is sublect to continuousdevelopmentand imprcvement Consequently this instrument may incorporateminor changes in detail from the information containedin thismanual Die Konstruktion und Schaltung diesesGeräts wird ständigweiterentwickelt und verbessert Deswegen kann diesesGerdtvon cienin dieserAnleitung stehendenAngabenabweichen C...

Page 15: ...S l l l l j l l l I o l l l j l l j o l l l I ServiceManual A u t o m a t i cD i g i t a lM u l t i m e t e r P M 2 5 1 7 E 9441 625 11O 1 FromserialnumberDl 4 02 4926 onwards 5 T2 3 3 9 4 9 9 4 7 50 1 3 1 1 ...

Page 16: ...stance ranges Temperature measurements ADC Datasignals examples BIockdiagram of digital section Flowchartandtiming Pulse diaqram of UP DOWN AUT ranging Timingof display unil Power supplysignals P i n n i n g H E F4 5 11 B Bl o c kd i a g r a m H E F4 5 1 1 8 LED indication P i n n i n g H E F4 5 5 5 8 Blockdiagram HEF45558 Pinning andblockdiagram of OO 0055 Pinning OO 0059 Blockdiagram OO 0059 Pin...

Page 17: ...racy Input impedance Protected up to Resolution AccuracV Frequency influence Temperature coefficient lnputimpedance Range Input impedance 999 9mV 9 999V 10t ro 1 1 99 99 V 999 9 V I tvl01 I 19l 1 0 0 0 V o r 1 0 0 0 V r m s 1400 V peak 1 0 0 p V 1 0 0 0 V 4 sub ranges 999 9 mV 9 999 V 99 99 V 999 9 V 1 0 0 s V i 0 57o of reading 10 1 of full scale 50H2 Valid 1 of range Additional error Error t 7oo...

Page 18: ...oCof reading Range Voltagedrop 99 99 9 999 A 200mV 150mV 10 A 100mA I m A 1 0 4 2 fixedranges with separate inputs 99 99 mA 9 999A Range Resolutio n 99 99mA 9 999A 10 llA i 0 8 of reading 10 19 of full scale at 50 Hz inputsignal 500 ppm oCof reading Range Voltagedrop 99 99mA 9 999A 200mV 150 mV 0 1 Q 1 0 t v o 5 sub ranges 999 9Q 9 999kQ 99 99kQ 999 9kO 9 999M O 0 1r Range Protection 99 99mA 9 999...

Page 19: ...at jon 9999 0 onlyo of 102digitistightedi or automatically mV O N4C by LED 5 V kO oC m A by functionselector v v ko oc m A_ m A by function setector CombinedV mA f S socket Commonsocket Special 10Ainputsocket Floating inputs Automatic for functionV andf lvlanual for all ranges I r GENERAL DArA Ranqe SI 1R R 99 99 mV 9 999V 6 0 d B 4 8 H Z l k F z 99 99V 999 9V 4 0 d B 4 8 H z l k H z Commonmoderej...

Page 20: ...ated ON continuous display 30 hours continuous disPlaV DimensionsLength 165mm Width I 15mm Height 50 mm l 4aterial ABS 0 7 kg withoutbatteries 1 3 POWER SUPPLY WITH RECHARGEABLE BATTERIES The pl 4 2517delivered from the factory is wiredfor usewith dry c llbatteries powersupplvor for a I V externalpowersupplYusing the PN4 9218 For rechargeable batteries powersupply the wiringinsidethe instrument ha...

Page 21: ... l easuring leads with testpins 2 Fuses 315mA quick I V powersupply PM9218 Directions for use t o 2 2 OPTTONAL ACCESSOR tES 2 2 1 Temperature probePM9248 Fig 2 The resistance thermometer Pl 4 9248 isa contactprobe suitable for measurement of surface temperatures between 60 oC and 200oC Range Resolution Accuracy combined with Pt l2517 Perm issible voltage at probe tip 60 oc to 2oooc 0 10c 60oCto 10...

Page 22: ...RTMENT PM2517E 01 SerialnumbersDM600 Dl 4900 PM 2511E O1 Serial numbers DM900andfollowing RECHARGEABLE BATTERIES WITH EXTERNALPOWER SUPPLY PM9218 PM2511E O1 SerialnumbersDlV1600 Dlvl900 PROBE PM2517E 01 Serial numbers Dl 4900 andfollowing INTERCONNECTION Fig l Power supply ...

Page 23: ... 700l 4Hz and l l5 at 1 GHz with 100 1 attenuator I L t t t t t Delivered with the PM9263 Accessory boxcontaining Fig 2 Zeroinglead 2 lVlarking rings red white blue Probe holder Springloadedtestclip Wrappin connector Insulating cap Dual in line cap 10 Soldering testpoints 2 Spare probetips lnstructionmanual Optionalaccessories Accessories usedwith oscilloscope probes canbecombinedwith this probe 2...

Page 24: ...x 600tvro 1 57o 20vo to 80yo 2 2 6 Note Checkthat earthconnectionsaremadecorrectly Currenttrans ormer type PM9245 Fig 8 With thistransformer it ispossible to measure alternating currents over10 A up to 100A 1000x 100A 100mA 45 Hzto l kHz Transfer factor Transfer error Frequency range Max permissible secundary voltage loss 200 mV lvlax voltage with respect to earth 400 V a c Betoremeasuring connect...

Page 25: ...1 4 Fig 2 Ftg 4 l r l b N v q r o o Fis 7 l tg Ö ...

Page 26: ...aracter decoder driverfor LEDor LC display bO 0059 aigital controlfor ADCandautoranging circuit OO 0060 switching part for ADC with Deltalvlodulation principle usedin combinationwith OO 0064 OO 0061 a c to d c convertor calculated Rl 4S OO 0063 programmable currentsource for resistance measurements OO 0064 voltage to currentconvertor for ADC with DeltalModulation principle usedin combination with ...

Page 27: ...e bridgeismeasured by the ADC 3 2 3 Analogto digitalconvedor Theconversion of theanalog signal intoa digrtal signal ismadeaccording the Deltal odulation principle TheADCsystem isbuilt intotwo LSIcircuits Theanalog signal isconverted intoa datasignal Theduty cycleof thedatasignal isproportional to theheight of theänalog inputsignal of theADC system TheADC system isalsoequipped with an automaticzero...

Page 28: ... to the decoderldriuerOO0055 The OO 0055determines that the correctfunction indicationis lighted Powersupply The PM 2517canbe poweredby 4 x 1 5V batteries or exrernal by means of the I v powersupplyPlvl9218 In case of powerON the displayiscontinuously lighted In case of powerSTAND BY which isonly used in the Plvl2517 E the displayisswitchedon for 40 sec whentheDlSpLAy switchispressed When thedispl...

Page 29: ... theADC andconverted intoa digital signal ln thedigital section thedigital signal tromtheADC isused to controltheanalog section andADCandto supply thecountrng results to thedisplay Fig 11 r t r l L ö L t OIG IÄL COIIIROL D SPLAY Fig t l In the detailed circuitdescription the sections will bedescribed 3 3 2 Analogsection 3 3 2 1 Dc voltagemeasurcments Fig 12 separately in theorderasshownin figure 1...

Page 30: ...01 R 302 C 305 C 306and R 306 Cp parasitic capacitances A d c voltage component isblocked by capacitor C 301 The 1000xattenuation asmadethevoltage dividerR 301 R 302 C 305 C 306 andR 305 R 315 R 306 C 307andCp parasitic capacitances The 1000xattenuation isswitched on by FETV 301 The FETswitch V 301canbeconsidered asanideal switchin series with itsown on resistance Ron The Ronof FET sswitchV 301 gi...

Page 31: ...22 L l jri o 4 f t Jr 1 l 5 t T _l ...

Page 32: ...0 A range is effected in the following way Whena banana plugisinserted in the 10A socket thedisplav isswitched from 100mA to 10A This isdoneby means of the 10A switch whichisbuiit in the 1OA socket Range I n p u tF D oo 0055 100mA 1 0A 0 1 General Resistor R 610 isused to getanequalloadin thelm A and m A function TheADC hasan inputsensitivity of 0 1V in case of dc currenr measuremenrs 3 3 2 4 A c ...

Page 33: ... 8 5v F0 1 0 7 0 3 1 io ADc O 1 VE N D O F R A N C E 14 a I t t5 ...

Page 34: ...ors R 406 R408 Theoutputvoltage 2 Vx issupplied to onesideof resistor R 409 On theothersideof R 409 voltage Vx isavailable fromthe inputterminals whichmeans lhatoverR 4Oga voltage of 2 Vx Vx Vx is available By selecting thesame value for R 4Ogasthe inputresistance of rheADC 110lMf2 theinput current of theADC iscompensated lrx lrx adc comp As I adc comp lrx lrx see figure17 Protection By means of t...

Page 35: ...o I 0 A L 1 t t n l 0 Fis 16 rtg t Fis 18 ...

Page 36: ...unknown voltage Vx Eachvalue of Vx hasa certain number of charge discharge cycles of whichalsotheshape differs withinthe fixedtime Charging Discharging Charging thecapacitor ismadewith a constant re erence current added with theconstant current caused with V x l r e f A l Discharging thecapacitor ismadeby theconstant reference current substracted with theconstant current caused by Vx I ref AI Thec...

Page 37: ...pattern only can be seenif a data signal is present and how the counter is counting up or down Example of a datasignal Note Thedatasignalshown in this diagramis not valid for the PM 2517 it only givesan impressionof a data signal in general For better understandingfor a measuringperiod of 407 clockpulsesis choosen A measuringperiod in the PM 2517 has 12288clockDulses u p 1 0 1 1 0 1 1 0 1 102 down...

Page 38: ...will be Vin withoutthe internai of set of theOO 0064 CircuitdescriDtion Theunknown voltaqes fromthe RMSconvertor or theattenuators aresupplied to thegates of FET V 102 In t h e O O 0 0 6 4 t h e v o l t a g e d e p e n d e n t t o t h e s e l e c t e d r a n g e l s s w i t c h e d t o t h e r a n g e r e s i s t o r s R a R 1 1 2i R 1 1 0 andR 6 R 111 R 114 Thecurrent Al lowingthrough theresistor...

Page 39: ...l l l l l l l l l l a Fig 20 J I l r V C O N V R T O R r ...

Page 40: ...OO 0059 I _l t e t t t t t t t t t Fis 2 For detailedinformationof the signals alsoreferto the specifications of the lC sconcerning chapter3 4 3 3 4 2 Control logic Fig 23 The controllogic comprising the OO 0059 is the centralprocessor of the Pl 4 2517 ln the flow chart abridged information isgiven aboutthetimingin theOO 0059 Whentheinstrument isswitched on themeasurements arestarted Afterthe wait...

Page 41: ...nside theOO 0059UP DOWN N A ln case of manual ranging UPor DOWNpulses fromtheUP DOWN circuitaresupplied to theOO 0059 ln the ranging counterthe pulses areconverted into the range codeI x depress isonerangeup or down In the ranges V andV the numberof ranges isfour BVmeans of signal f this isextendedto six Aut By means of a logic1 ot signal AUT autoranging whichisgenerated by theUP DOWN AUT circuit ...

Page 42: ...R O D C O N D T O N M E T R A N G N G 2 n d M A S U R I N G P E FO D R A N G N G C O M M A N C W A I T I W A T 2 J s I M E A S U R N C P E R o D W A I T I W A T 2 2 n d M E A S U R I N G P E R o D S T O P c o c K P U L S E 5 5 T 5 r s Fis 23 ...

Page 43: ...5 The UP DOWN inputs of theOO0059areconnected ro logic0 _g 5V again andthelighring of the MAN indication isstopped orA indication Whentheinstrument isswitched on or whenit isswitched fromranqes m A I _ m A v oCo to ranges V V or kf visaversa the instrument will aiways startin MAN ranqe mode DH Withthedataholdsignat ispossible to holdthedata Thismeans thatthepresent value of thelastcompleted measur...

Page 44: ...0059 3 3 5 Display unitN2 Fig 25and54 3 3 5 1 Genercl Thedisplav section consists of four 7 segment LEDsa BCDto 7 segment decoder a dual 1 of 4 decoder demultiplexer for serial display andthe polarity unit indication Thedisplay section isbuilton onesmall p c boardN2 The interconnection between the unitsin the PM2517 is madeby a 2g poleinterconnectron strip Of the stripnot all contacts areusedin th...

Page 45: ...istrue logic1 andonepartol thedualI of 4 deco ier HEF4555isblocked Noenable In thiscase only LED 102isignited asthisoneisswitched via theotherpartof the HEF4555 enable 3 3 5 6 Decimalpoint lDP3 DP2 DPI Thedecimal pointinformation isdirectly derived fromtheOO 0055lD 703 14 151161 andissupplied to the corresponding decimal pointsviaa 270Q resistor see tableandOO 0055specification chapter 3 3 53 Ranq...

Page 46: ...V E R R A N G EO V R B L A N K D I S P L A Y toGrc I 0v L0G rc0 8 5v I N D I C T A T I O N RANGES V ORmA n D E P E N D E N T T OT H E P O S I T I O N O F T H E F U N C T I O N S W I T C H W H E NN OU N I T D I S P L A Y T H E S W I T C HA R E 2 517 l 4 O l 4AN A S A R E I N D I C A T E O U N I T SS H O W NA T V A L l D O N T H E T I T F U N C T I O N 000 1 M A N A M A N A 5 T 2 5 l l N O T E rrg z...

Page 47: ... BZX 79 C10 V 852 BAW62 supptied to V 801 BC558 Thefollowingvoltages aremeasured in the powercircuitoI a PM 2511with a 9 V externalpowersupplV P 9218 o vü I I I l I t t t o Ö a N o 0 E v 8 5 l 7 5 V r 5 v 0 5 v 0 0 _ 9 V o u ü s T 2 5 l 8 C A T N O D E 3 5 I t I t l t F R E O U E N C Y v 1 6 0k B z N O T C H A N 6 N G T H N P U I V O L T A G E C I I A N G 5 I i E F R E O U E N C V Fig Dependent to...

Page 48: ...Oato Oo isdete rmined by the dataon AOto 43 WhenEt goesHlGH the lastdatapresent on AO ro A3 aresioredin the latches andthe segment outputs remainstable Wheni il isLOW all the segment outputsareHIGH independent of all otherinput conditions WithITL HIGH a LOWon IB forces allsegment outpurs LOW TheinputsITL andIB do noteffectthelatch circu it I c b o I I G N D I V Fis 27 address data inputs latchenab...

Page 49: ...X X L X L H L L L L H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H L L L i L L L L X X X X X X X X L L 11 L L L H rt L L L L n H n I L n H 11 L a n H L H TI 11 TI n n L n 11 L X H H L n L 11 L H L TI H L TI L 11 L H rl t l H H FI F L FI n L n L L L H L L n FI a TI n TI I H n L FI 11 H L n L L n 11 L L F H L 11 L L n L L L H TI I n L L L a L L L L L L L L L L L I L L L L t L 8 ...

Page 50: ... 82 rtg J t 0 3 a 2 0 l 00 E G N oI v H E F1 5 5 5 Fis 30 The HEF4555B isa dual1 of4 decoder demultiplexer Eachhastwo address inputs Ag andA1 an active LOWenable input ET andfour mutually exclusive outputs whichareactive HIGH O0to 03 Whenusedasa decoder Ewhen H lGH forcesOg to 03 LOW Whenusedasa demultiplexer the appropriate output isselected by the dataon A6 andA1 All unselected outputsareLOW I I...

Page 51: ...utinformation range function polarity character outputsused for indication oJ characters v m k M Sl DP1 DP2 DP3 VA areactivated By means of a clockinputthe outputinformation ismadesuitable for a LiquidCristal Display t_ croJ tt k d P 2 d P 3 t t r L t t t r L t t r L t t Fis 32 t t t t L oooouu l 8 I 1 7 9 1 6 t 0 1 5 t 1 4 1 2 r l CIIARACTER OECOOERDRIVER sI21A1 ...

Page 52: ...ignal makes thedisplay information suitable for a liquidcrystal display Not used in Plvl 2517E Negative supplyvoltage 8 5 V TheVA signal together with thefunction selector determines the V or A indication on thedisplay Decrmal porntinformatron for thedisplay Theinformarion is I determinedby the function andrangeinformation I AC information for thedisplay in thefunctions V andA lNot used in Pl 4 25...

Page 53: ... X X X X X 1 1 0 0 0 0 0 0 0 1 1 0 0 0 1 0 0 0 0 0 l0 0 1 0 0 0 1 0 0 0 0 0 0 1 0 1 0 0 0 1 0 0 0 0 0 0 0 1 1 0 0 0 1 0 0 0 0 0 0 1 0 1 0 0 0 0 0 1 1 0 1 0 0 0 0 1 0 1 0 1 0 0 0 0 1 1 1 1 1 0 0 0 0 0 0 0 1 0 1 0 0 1 0 0 0 0 0 l 0 0 0 1 0 0 1 0 0 0 0 0 0 1 0 0 1 0 0 1 0 0 0 0 0 0 0 1 0 1 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 1 0 0 0 0 t 0 0 0 1 0 0 0 0 1 1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 1 0 1 ...

Page 54: ...ountingthe result LATCHES andIMULTIPLEXERS for controlling a LEDor LX display LEVEL DETECTORto determine whethershouldbe ranged up or down in the auto rangemode CONTROLLOGICwhichgenerates thesignals autozero polarity overload andto whichtheinformation autoranging anddataholdcanbegiven r r r r t_ L t t_ t 5 t t_ t t t r L t t L L t t_ L L_ D S1 0 5 2 LÄEN AUTO RGXT RNGC RNG8 RNGA DOWN T E S T 8 5V ...

Page 55: ... thedecoder whileDS1andDS2arechanging Logic1 isautomaticranging The rangeinformationwi l bechanged whenthe measuring result is 900 and 9999 900 downranging 9999 up ranging Logic0 no automaticranging manualranging Range switching canbeeffectedby the manualrange switches With this signal the ranges canbe extended This signalisusedin the functionQ and isactivated by the functionswitch Logic0 the rang...

Page 56: ...LOGICI polarity Logic0 normalmeasuring Logic1 the present valueof the lastcompletedmeasuring cycle will beheld lf DH becomes 1 themeasuring cyclewill beended thereisno transfer of measured data Thecontrollogicwiltbewaiting untilDH becomes 0 anda new measuring cyclewill bestarted Whena measuring resultis 9999 in the highestpermisseable range inmanual or automatic ranging mode thensignal OVR willbec...

Page 57: ...tput signal with a dutytYcle depending on the input voltage of the ADC It generates the clock for the digitalsectionof the PN 4 2517 thisclock frequency isdetermined by external capacitors I r _ r _ t _ 8 5 v C L O C K N C C c l o c k t t _ t C c o m p c o N C N C DATA N C r 8 5 v N C N C v d d V s s G N D 8 5 V 8 5 V cLocK 5 W I T C H I N G ...

Page 58: ...nsation Ground no connection no connection Current input no connection Currentinput Supply 8 5V no connectton Dataoutput no connection Negative supplyvoltag Clockoutputfor Oo 0059 80kHz 120kHz Thiscapacitor determines the clockfrequency Capacitor compensates internalactlveparts Supplyzero ü Inputfrom V l convertor Input jrom V l convertor Positive supplyvoltage Outgoing datawith a duty ycle depend...

Page 59: ...f threemain partsviz a voltage to current convertorwith two selectable input ranges a currentrectifierwith an autozero compensation circuitanda logarithmic antilogarithmic calculating RMSconvertor 00 0061 R b R b GNDV V i n2 S o 5 i n 85v O U T Crms PROT R o 8 s v AZ Fis 36 R o R b sT2486 vss GNo Vdd 8 5V 8 5 V ...

Page 60: ... voltage across the capacitor iszero A DCoffsetcausing a voltage across C is compensated sono influence isseen upontheoutputsignal Supplyzero ü Protectioninput Output currentof the Rlvlsconvertor Thecurrent flowingthrough a knownresistor gives the RIVIS voltage of the unknowninpLrt voltage Positive supptv 8 5V By means of theSinandSoa selection canbemadeRaor Rb whichdetermine the ioputsensitivity ...

Page 61: ...ndanindependent operational amplifier The reference currentsource canbeadjusted to 10 A Thecurrent multipliers together givea multiplication range of 1 100 1l10 1 10 100dependent to the digitalinput code The op ampis independent of the currentpart and isusedfor compensation andprotectlon r_ t 1 I t l v r a L L _t a I t I t I L t t L C s 8 5v R N GB V O U T C C O M P C s C N D 8s v RNGA R N GC Fis ...

Page 62: ...rmation see12 13 Output of the compensation ampiifrer Compensation capacrtor for the compensation amplifier and input of the compensation protection amplifier Compensation With the amplifierthe currentconsumptionof the ADC is compensated duringOmeasurements Protection With the amplifieralsothe leakcurrentthrough the protectiondiodesduringO measurements iscompensated Togetherwith signalRNG B the si...

Page 63: ...th two selectable input ranges anda precision current reference source Two External inputdevices areneeded FET s A separate inputprotection isprovided S o S r n G N D V N C 5 v N C N C i r e i R s 8 5 V I t_ r _ l t t t t 5 t t t t Fis 38 ig l1 T I l d d d c 2 L 2 3 22 2 2a l 9 I 8 1 7 r 6 t 5 r 3 V s s V d d G N o 8 s v X 8 5 v C U R R E N T S O U R C E I ü O U A L VOLTÄGE TOCURRENT CONVERTOR ST2...

Page 64: ...or inputsensitivity1 V Currentoutput Currentoutput Range b conversion resistor inputsensitivity 1 V Source inputfor device 2 Range a conversion resistor inputsensitivity 0 1V Draininputtor device 2 Negative supplyvoltage 8 5 V Current input Currentsettingresistor Currentreference output Tc settingresistor no connecuon no connectton Positive supplyvolrage 8 5V no connection SupplyZero f Range selec...

Page 65: ...sljdebodies item1 Fig 40 Theslide switchconsists of two bodies ln the bottoffibody the swjtchcontactsaresituated A switchcontactconsists of a springanda slider Note All partsof slideswitch 52 are in stockseparatelv when a completeswitch has to be replacedall parl556prJ14 be ordered when mounting the slide switch again push both bodiesslightly on thep c board and stidethe retainingringsoi theprnsag...

Page 66: ...tisnotneccessarytoUnso oer the wiring 4 3 6 ShuntR 602 Figure40 item 5 Unsolderthe inputsocket 10A X1 andO X3 from thebottomp c boardtogether withtheshunt Unsolder the shuntfrom the socketandreplace it by a newshunt Solder thesockets on the p c boardagarn 4 3 7 10A switch57 Figure43 item 1 Fromtherearot thebottomp c boardthecontacl soring ot the 1OAswitch canbe emoved T h e l o A s w t c h I s s t...

Page 67: ...62 Fis 40 Fis 41 Fig 43 ...

Page 68: ...edin the extremecase Themeasuring arrangement should besuchthatthemeasurement cannot beaftected by external influences Protect thecircuitagainst temperature variations fans sun Withallthemeasurements thecables should bekeptasshortaspossible at hiqher frequencies co axial leads should beused Non screened measuring cables aotasserials sothatthemeasuring instrument will measure HF voltage values or h...

Page 69: ...olt rango Calibratron ränge 9 999V Calibration range s9 99V Checks V ranges Ranse 999 9V Linealitv Adi resistor R203 coarre rR25 1 E48re ies Potentiomete R204 fino Adj resistors R206 R208 l 4R25 1 E48series coars Potentiometer R207 fin Note gg2 U g deviation 80di7iß 160 digiß cut affiy R2o6 devietion 60 digits 178 digits cut away nm8 deviatton 78 digits cut awav 8206 and R208 lnstrumentset in posi...

Page 70: ...0 01 b 9kslr0 0r c 90kf21 0 01 d 900 kQ r 0 01 Supplisdto Vf and 0 rek6t 900 0 I 1 disit 9 000Mtrt5disirs a 3 000 l lo t 20 digic b 9 OO0 k f2i 20 disiß c go m ktrl120disis d 900 0 kC2150 digits Ranq69 999 MO Rang69 999 ki l Range99 99 kO Range99ir 9 kO 1 7 l 8 TampaElu a aangar ooc calibration Chsk temp ranges I oooc sooc Potentiometcr R502 Instruments tin po3ition 60 2000c Inirument setanrcsitio...

Page 71: ...replacingparts Afterrepairthe instrumentshouldbe calibratedagain Faull finding procedure ln this chaptera genera fault finding table is givento locatethe incorrectsectionin the inslrument Fromthis generalprocedure the incorrectpartscan be foundby usingthe detailedfault finding tables Nole The fault iindingprocedureis meant as an aid for fault finding This means that the incorrect componentcannottl...

Page 72: ... decrmalpo nl Inconecl O s c l a t i n g b e l w e e nl w o V t ur a n g e s 6 5 2 6 53 6 54 Funct on V V or kt I n p u l in o t m p o r t a n t M a n u a l i A u t o r a n g r n g Rangng parl s burll rn the conlroi o g r ca n d s u s e d n a i f u n c t r o n s 6 6 Vfu RANGES RM S Displayconsianl 0000 Displaywill nol becomezero VQ O sho lcrrcurl ad Adlustmentcannol be made Adt no l0 rnqorrecrmeas...

Page 73: ...Whenvarying Vball lhe trequency should change V850delecl V801detect or R802lo small 560k4 B Ripple on suppy voltage 10mV Hi C804 Lo o sockel ü Wilh oscilloscope 50 Hz 8 0 1 0 0 k H z 4 H z 100Hz Delect n power supply Delect n control clock refer to 6 5 Delect rn AZ signal relerto 6 5 Oelecl in display control referto 6 5 c Converlorfrequeflcy Supplyvoltage 8V 8V H i C 8 0 4 Wiih oscilloscope Vary ...

Page 74: ...nt l y easuring data Incorrecl n m a n u a lr a n q r n q N o L E DM A N r q n r e o V s u p p l y s B e e ri o 6 11 6 2 4 One 7 segmenl is lighted very bright N o From i leasurement N4easuring points lVeasu ring data Correct tncorrect Supply vollage H i c 8 0 4 Hr C802 8 V 9 V 8 V 9 V B e f e l o I Check power R e f e r tt o 6 l l B C ocksrgna OQ0060 4 1 0 1 H i A 1 0 1 r 2 Wilh oscrlloscope n n ...

Page 75: ...2 D S 1 Hi D702l3 DS2 Wilh oscL oscope fll Lflf u 1uuu 500H2 f LJ l_ usu 25OHz DefectD702 No From Mgasurement i easuringpoints lvleasuring data Correct Incorrect V bais o1lhe cathode swrlchesol the LEDs concernrnq Hr barsV701 7021703 ot V7O4 Wrth oscilloscope B I o c ks i g n a r 3 V p p Drvsron of the sigoals DSl and 0S2 R e l e rl o F i g 2 5 Delect transistor v70117021703 or V7A4 Relerto B B Ou...

Page 76: ...Dr0 1 H i 0 1 0 1 1 5 A Z H l 0 1 0 1 i 1 6A Z Wrlh osc oscope 2 0 0 ms e c azj l J o e sv A Z L J 8 5 V Relerlo G DeiecrOO0059 G AUIOZETo AZ on FET v1o2 vr02 I H q a t ev t 0 l v 1 0 1 W l h o s c r l l o s c o p e InPutvollage supplred lo ADC 90mV and 900mV referto A 200msec az l l_l G or B 0 a 90 mV n range 99 99mV b 9 0 0 m Vr n a n g e 9 999V Deleci O00059 Check R504 Ctrecktracks r E T v t o ...

Page 77: ... ng resrslor 9 k 5 3 1 6 k 2 Poteniiometer 2k2 R 1 0 5 1 0 k 2 DelectOQ0064 c lref000064 4r02 H A l 0 2 1 4 Wilh oscilloscope Shori crcuit ADC input Osc ations Check capaclor c 1 0 Referto D D C l n p u to f A D C SwrtchrngPa oo0060A 10r H A10r 10 H 4 1 0 1 1 2 I w V lomv DefectO00060 Check C103 R104 Track Inlerruplron l n p u tA D C i H i F 1 0 8 nghl hand s de 6 3 4 No adjustment ol instrument p...

Page 78: ... L I V 1 0 lr Vt0 1 Conslanl 1 t v t 1 l r r v l 0 l 1 n I QC h e c k R 1 0 AR 1 0 9l r a c k s ADO H B l 0 8 r q h l h a n d N O From Measurement N4easuring points lvleas unng data Correct lncorrect I n p u lo l A D C sw lch ng part 000060 ar0 1 H i a r 0 1 1 2 2 6 V 3 2 V Bothsrq nas should Deiecl O00060 B C h e c kC 1 0 4 C 1 0 5 cr06 c r04 c105 ct 06 Cl 0 5 3 9 0 p f C106 390pi R e l e rl o C ...

Page 79: ...no 3 4 5 No From Measurement Me3suring points l easuringdata Correct tncorrecl D i s pa y F e f e rt o A d t n o 3 4 5 Check R204 47k pot meler Trackinterruptrons C 2 0 1 1 0 n F I s h o r l C202 33nF t clrcu I R201 4M2 lnle R 2 0 2 4 M 2 f r u p t i o n a Instrument slays on tl Drsplay r e l e r t o A d t n o 3 4 5 Ch cki R2O1 4M2 R2A2 4M2 F 1 0 8 1 M R 1 0 9 l M 6 4 3 Range lov _ and l00V cannol...

Page 80: ...o From Measurement Ny easuring points lvleasuflng data Correct Incorrect Auto rangrRgsrgnal AUT OO005S D101 H i 0 1 0 1 4 Loqic 0 8 5v Reterto E Reierto I B anode voltageV150 H i V 1 5 0a n o d e L o gc 0 8 5 V Fefer to C c B KalhodevoltageVt 50 Hi Vl50 kalhode Logic 0 8 5V Fe erlo D C h e c k switch ALjTO D c A n o d ev o l t a g eV 1 5 0 Hr V 50 anode Connecllhe kathodeo1 V 1 5 0v r aa t 0 0 k a...

Page 81: ... 1 0 0 v 0 1 0 1000v 0 r 1 L o g i c0 8 5 V Logic 1 0V Beier to lrulh lable ot oo0055 Reterlo B B SignalsFA FB FC FD oQ0055 0703 Hi D7O3t7 FA H i D 7 O 3 8F B Hi D703 9 FC Hi D703 10 FD Function FO FC FB FA V r 0 0 1 1 V 0 0 0 1 a 0 0 1 0 t o 1 1 o c 0 r 0 0 m A 0 I 0 l m A 0 1 1 1 104_ 1 1 0 1 1 0 4 1 1 1 1 L o g i c0 8 5 V L o g i c1 0 V Referlo truth tableoi oQ0055 Relerlo C Defecl sw lch Track...

Page 82: ... DelectO00055 Reier1o6 5 3 Dec ma po nl 6 6 1 Display constant 0000 No From Measurement lvleasuring points Measuringdata Correct Incorrect I n p u t s r g n a l c301 R301 Selscl RangetV Äranua rang ng Supply 0 5V Va O l s l h e r e a s g n a l R e l e f l o B N o s l g n a l C h e c kC 3 0 1 Selectorswitch B Signal Vinl ot 000061 4301 Hi 430113 Select Ranqe V Manual ranging Supply 0 5Vtu VOO 0 5V ...

Page 83: ...2 000061 A301 H i 4 3 0 1 3 V r n l H i 4 3 0 1 1 5 V i n 2 S lect FunclionV A U Tr a n g i n g ShodcircuitVQ o 1C nV Bothsignals should be R e l e f o D Referlo C C I Check R306 and R309 Trackinterrupl on R306 R309 F306 200k R309 237k Delecl 4301 R e p a i r D I Dioderneasuremenl betweenAZc Inputs of 000061 A301 Hi 4301i6 Lo 4301 7 Selecl FunctionV AUT ranging ShortcircuilVQ 0 0 6V Relef lo E Def...

Page 84: ...ent l 4easuring points Measuringdata Correct Incorrect Range l0Vrdeviares RangeToovtudev ates Referto B Relerlo G a Fange 10Vtudeviates w r l h a f a c l o ro i l 0 Rangelovtu dev ates mol wrlh a iaclor ol 10 Rel to C C B Range10Vtu dev ation t a c t o r1 0 SignaiSin O00061 4301 H i 4 3 0 1 1 3 Sel6ct Bange 10V Logcr 0v R e l e f t o E Reierto D D Slgnal RNG A oo00s9 0101 H i 0 1 0 1 8 Lo O socket...

Page 85: ...heck t cu enl can be adtusted Relerlo C Relerlo B B CheckF402 F404 R403and lracks R402 R404 R403 F 4 0 2 1 2 1 k R403 10k pot meler 8404 16k9 Oelect 000063 c Current lrx000063 440r Select Funcl on kQ Ranger000a Relerto D DetectO00063 D c Vollageon lry Inpul 000063 a401 Hr 4402 16 Lo o sockelü S6lect FunctionkA Range1000Q ShortcircuitVQ and 0 Detect O00063 Check R401 6 7 3 Range1oMQcannot be ad ust...

Page 86: ...cope 400mV 3kl lz 4kl 12 Note n rnstrumenls s e r a t n u m o e t D M 0 l 6 0 1u p l o Dt 1 0r r 715 the clock s qnal s Reter 1l I Feier to C B Devatron D i s p l a y Sma I dev ätron Reierlo C DelectOO0063 c B RangeInforrnalon R N GA R N GB N N GC oo0063 H A a 0 1 1 3 R N GA H I A 4 O 7 R N GB H i 4 4 0 1 r 2 R N GC Lo O sockelü Selecl Funclion ka MAN rangrng R N G I K t 0 k 1 0 0 k 1000k t 0 M 1 ...

Page 87: ... range 100m4 Checkluse F1 315mA and the wiring 6 8 4 Range100mA _ cannot be adjusted Adj no 19 No From l y easurement l y easuring points Measuring data Correct tncorrecl Check R603 R603 I 8 a 1 1 0 Relerto B B Check F604 F606 R607 F608 R610 R604 R606 R607 R608 R610 R604 2494 R606 13k3 8 6 0 7 4 0 k 2 R608 1k R 6 r 0 2 0 5 k Checktracks 6 9 1 Display constant 0000 N o From Measurement l y easuring...

Page 88: ...g p o r n t s N4easu ringdata A RANGES S i q n a iR N GC o f oQ0063 a401 Lo 0sockel C h e c ks w r l c hD 1 3 1 4 6 12 1 Standby time is too long No From N4easurement l 4easuring points lMeas uring data Correct Incorrect Signal DSl ot OO0059 D 1 0 r a n d o n R 7 2 1 H r D 1 0 l 1 H i R 7 2 1 t e f lh a n ds i d e Lo o socket ü With osc loscope 500H2 t n n n r 0 8 5 v R e l e ft o B Track Inlerrup...

Page 89: ...C701 680nF B Ease lransistorV706 H V706 base Lo O 5e61s1 Oepress Pushbutlon DISPLAY OV Eeferto C DeiectV705 c Check F719 R720 R719 F720 R 7 1 9 6 8 k O F720 82kA De ectV706or lfacks No From l y easurement Measuringpornts lMeasu ring data Correct lncorrect Signal 0H OQ0059 o10r H i 0 1 0 1 1 8 Lo O sockel Data hold functron nlerconnecl poinl 5 ot lhe probe npul and lhe 0 sockel ö Loq c 1 0V DefectO...

Page 90: ...T801 Testpin red Testpinblack Fuse 315mA FASTSANDFILLED 5322 447 94558 5322 459 24094 5322 414 64098 5322 492 64675 5322 414 64099 5322 492 64616 5322 447 94492 5322 492 64612 5322 505 10514 5322 40594164 5322 462 44148 5322 443 64026 5322 462 44148 5322 46694555 5322 443 64025 5322 492 64614 5322 256 40011 4422 265 20051 5322 216 94208 5322 274 54001 5322 492 64628 5322 492 54291 4822 53010122 53...

Page 91: ...87 I o Fig 46 Fis 47 Fig 48 Fis 49 ...

Page 92: ...261 560 k 10 CR16 Carbon _ I R304 532210114099 4 1 M 20 O O5 W Trimming potm R305 5322116 54228 1 78k 0 1 t 1R24C t 4etat f itm t I R306 5322 11654A92 2OO k 0 j t iR34E lMetat fitm l R307 5322 11654218 3 01 k 0 1 MR24C t 4etat fitm L _ R3O8 5322 11654191 30 1 k O t t 4R24C Metat film a I R309 5322 11654732 237 k t MR25 fvtetat fitrn t R310 532211654619 10 k 1 i 1R25 tMerat fitm I R312 48221OO 1OO2...

Page 93: ...tO3 482211130308 482211063092 4A2211063092 4822 11063092 4822 11063092 4822 11063092 482211063092 4A2211063092 482211063103 4822 11063r03 482211063092 482211063092 4822 11063092 4822 11063103 4822 11063103 48221r063103 4822 11063103 4822110 63156 4822 110 63158 482211042227 532211130291 48221113027 4 44221 11 30214 4822 11063163 482211063069 4822r 1130333 4822 110 63116 48221 10 63181 482211063081...

Page 94: ...231191 4822122311a9 442212231116 482212230103 442212230103 5322 12140281 482212231175 482212230103 4822 1214023A 482212230103 442212230027 482212231125 482212230114 ß22 12230114 53221241407 5 5322 121 40233 442212230103 442212230103 482212230103 442212230103 482212230103 482212230103 4822 12420459 4422 12420459 4822 t24 20459 4422 12420459 482212231012 4422 12420459 L t t t i 5 t t t t t t t t t t...

Page 95: ...3030914 4822 130 30613 442213030914 482213030914 442213030914 442213030914 532213034731 532213034731 532213034137 532213034737 482213030613 482213030613 482213040941 4822 13044246 532213034297 482213030613 482213030613 48221303061 3 5322r3034049 532220985853 532220985852 5322209 14184 532220914122 5322209 45884 5322209A58A7 532220985885 532220985886 B F O l 6 oN528 BRY39 BSVSO B F 2 5 6 B VF256B B...

Page 96: ...nsof rh stat stor about 2V l ssrpat l frar the povverrltputt r rnrna R 6 1 0 2 4 9 k l v t R 2 5 1 5 3 2 21 i 6 5 4 7 3 4 r e p t a c e c l 205k l itRt5 1 532211654 21 C305 3 9p 500Vj O25p 482212231217replacr d by 5 6 p 5 0 0 V t0 2 5 p 4 8 2 21 2 23 1 1 9 j C306 3 9p 500V10 25p 4a221223121j 4 7p 500Vj 0 25p 4B2Z12231189 C307 1 2n 500V 10 482212231jj1reptacecl by 2 Vt 500V i0 4922 12231116 TrackC6...

Page 97: ...n Added Replaced Replaced Replaced R 3 1 0 R313 9k09 MR25 12 o 10k t 1R 25 1 10k t 1R 25 191 100k t 4 R25 196 Modified C304isconnected to 8 5Vlnstead of c 3 1 1 V850 BZX79 C10 5322 BZX79 810 5322 lnF 40V 20 80 482212231115 13O34297is replaced by 130 34297 Dt 103 572 Wire from p c boardto screening is replaced bV a spring Dr 103 6131 r Topcover 5322 44194493is replaced by 5322 441 94558 Window 5322...

Page 98: ...gEzoo Ntt trmst ä Dläl l vzor l 1Rl a ro Ä HUr t t a r v l t Y T7 A R3121 F L l o T r l3l3l lr I tBlBt ti I ttoq Ic306 J U Z r t o l t o l tgl f il l llrät ffi lm tl tt rit v70s Rt l_ lRl z f D vzor r iel jKg fD v760 l l v7s0 Q i 5 6 ä1 l i V l l l l I I v75r J t t o I L n n n n n n o lslol n 0 Yl t lrlf l Yt AI Ery ffi ü v 75 9 t D v758 n l_l l l t756 c l 0101 Fig 51 P c boards conductor side ...

Page 99: ... BOTTOM VIEW T80 1 i I R106 l 719 lFl lRl llJ BOTTOM VIEW s3 s6 ir ir X4 FUSE TQ BATTERY C O M P A R T M E N T X6 POWER Fig 50 P c boards component side i i h 9ffi0 rc X3 0 fl ü iAlll i rr rg l 1 r i 1 lE5öu L H II JUJI ...

Page 100: ...I I I I I I I I I l I l l l l l l o l l J l I I I I SIDE KQ 7 97 SIDE 2 O O C I o t t r T I I f l S L ID E R CONDUCTOR t 12 t o Fig 52 Function switch lay out ...

Page 101: ...W t d 2 d k g o g B O T T O M V I E W B R YJ 5 o g t l ö L x Y L 4 V L r U L l k l k A T t l l o Y l o 1 a r n e b c BOTTOM ö L f f ö V I E W P N P d s Bsv80 Put rJo L E D 2 l 3 COt 4 M0 N N C K A T H O O E 5 N C t h 6 N C 1 0 c 7 e 1 1g 8 d 1 2 N C 1 4 C O M M o N K A T H O D E I J T O PV I E W c o x8 2 A 000060 000061 oo0055 00 0059 oo006 3 T O PV I E W H E F4 5 1 1 H t s F 4 5 5 5 s T2 1 72 Fig...

Page 102: ...I l l l l l l l tal T V i c 3 0 2 6 8 0 I V M JA l 2 l r l r x I 13lR610 J l l l l l l l c r 0 8 l v lo J l J J J l J I l o l i r v 1 c 2 0 2 Trsi l lt ...

Page 103: ...N1 DIGITAL CONTROL c104 T p V ADC RANG ING 5 ti g l l r N i l a l I iBlFa Ir 5L _ I C0Y5rl r f a a v i r _ c r i i r i l Elry l dr l8lRrol g CURRENT SOURCE ...

Page 104: ... 0 1 A D J U S T I N G R E S I S T O R S rEM VALUE R 1 0 7 R 2 R203 R 3 tI R 4 1 l R66 R509 9 k 5 3 t 5 k 2 9 k 5 3 r 2 k 4 95k rz k 20k5_ 205k 21k9 12k2 68kr_ 562r 806_ 1k96 187_ 11k7 M R 2 5 1 1 E 4 8 5 E R E S v750 7 6 1 K D 5 r O S 41 1 0 E F l n l I ls a 0 Y 5 r Note Thecircuitdiagram shows the PM2517Efrom serial numberDMO14926 onwards For modifications in theearliar instruments referto chapt...

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