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Fluke MP3 User's Manual

1. Resistance 10022 1 kQ 301 10 KR 100 kQ 3 00576 1MQ 10 MQ 2 05 Digital Multi Meter DMM 1 mV resolution John Fluke Model 80208 Calibration Leads 24 Shielded cable with a double Pomona 2BC 24 banana plug at both ends 4 11 CALIBRATION ACCESS 6 To reassemble reverse the previous procedures 4 12 Use the following procedure to gain access to the in a logical order librati djustment the backup f F2 calibration adjustments or the backup fuse F2 4 13 DISPLAY PCB ACCESS 1 Set the POWER switch to OFF 4 14 Use the following procedure to access the Display PCB for troubleshooting 2 Remove the power cord from the rear of the instrument 1 Complete the Calibration Access procedure 3 Remove the screw located directly below the 2 Refer to Figure 4 1 Turn the instrument over power receptacle and remove the indicated screws 4 Grasp the front panel and slide the instrument 3 The LCD POWER switch and RELATIVE out of the case switch are mounted on the Display PCB Assembly Gently push on the LCD and 5 The backup fuse and calibration adjustments POWER switch sliding the assembly towards are now accessible on the underside of the the rear of the instrument until the LCD and instrument as viewed from the front panel the switches clear the front panel and the right hand side pcb edge slot NOTE 4 Flip the Display PCB over on the right side of With the power cord replaced the instrume
2. 1 8773 1 8879 T RENE NER E i I 1 8667 1 8772 BE E i j f 1 1 8562 1 8666 cM e od E ono i f i 1 8459 1 8561 EN RR i i 1 8356 1 8458 4 2 A A i 1 8255 1 8355 to 44 i i I i 1 8155 1 8254 4 4 i 4 4 l j 1 1 i 1 8056 1 8154 NNI i l 1 7958 1 8055 i A MI TE j i I 1 7861 1 7957 i L j N i 1 7765 1 7860 Ext p o j j I i 1 7670 1 7764 E hend I i i 1 7576 1 7669 I i A 4 I i i 1 7483 1 7575 a A 1 7391 1 7482 i amp 1 7300 1 7390 NO JUMPER INSTALLED SELECTABLE JUMPER CONFIGURATION FOR DC CALIBRATION VOLTAGE REFERENCE VR1 CALIBRATION NETWORK U5 9 Perform the Calibration Adjustments 3 Connect the DMM Calibrator to the 8050A as follows HI to the V kO S input connector and PROCEDURE 4 55 The rms converter offset adjustment should be 4 Adjust the DMM Calibrator for 1 0000V ac performed if R29 does not have a sufficient adjustment rms at 400Hz range or if the 8050A display reading is greater than 0040 in step 3 of Table 4 9 Use the following procedure to set 3 Turn on the DMM Calibrator the initial offset of the RMS Converter 6 With the DMM measure the voltage at pin 7 of 1 On the 8050A set the POWER switch to ON the RMS Converter with reference to ground TP1 This voltage must be 0 0V 20 mV 2 Select the AC V function 2V range Record this voltage to the nearest 0 1 mV If the 4 11 MAINTENANCE TROUBLESHOOTING me
3. V kKQ S 2 ENDE l COM gt OHMS VOLTAGE SOURCE USB VATILRZ lt VRX y 4 Q p RANGE EN o E SWITCHES gt US THEORY OF OPERATION SIGNAL CONDITIONING FUNCTION AND RANGE SWITCHES TRUE RMS CONVERTER A VOLTAGE MEASUREMENTS TO TOUCH AND HOLD CIRCUIT DC Ba gt R16 AC c R17 TRUE RMS CONVERTER i B CURRENT MEASUREMENTS 0 20 Lo 2F oO U18CF I C7 L A D BUFFER C7 U7A Q19 A D BUFFER INT CONFIGURATION ursaj DE INTEGRATE CONFIGURATION me x RX C RESISTANCE MEASUREMENTS BUFFER OUTPUT pr s T INT O DEINT pell 20022 2kQ Vax VO REF ALL OTHER VRX Vax Vari n2 7 Ver RANGES VRX Yeti R27 Wax Vari R2 Vn REP VQ REF Figure 3 5 Signal Conditioning 3 7 THEORY OF OPERATION TRUE RMS CONVERTER 3 28 As Part C of Figure 3 5 shows when the 2 mS 20001 or 2 kQ range is selected the voltage drop across the unknown resistance is measured in relation to the voltage drop across the known reference resistor and since the same current is flowing through both resistors the value of the unknown resistance can be computed using the formula VRx _ Rx VoREF RREF Minus Vorer is necessary for de integration during the Read period 3 29 As Part Cof Figure 3 5 shows when any range but 2 mS 2000 or 2 kN is selected the voltage drop across the unknown resistance is measured and C7 charges up to the ohms voltage s
4. Digital Multimeter Instruction Manual P N 530907 October 1979 Rev 2 7 84 91993 Fluke Corporation All rights reserved Printed in U S A Ail product names are trademarks of their respective companies WARRANTY Fluke Corporation Fiuke warrants this instrument to be free from defects in material and workman ship under normal use and service for a period of 1 year from date of shipment Software is warranted to operate in accordance with its programmed instructions on appropriate Fluke instruments It is not warranted to be error free This warranty extends only to the original purchaser and shali not apply to fuses computer media batteries or any instrument which in Fluke s sole opinion has been subject to misuse alteration abuse or abnormal conditions of operation or handling Fluke s obligat on under this warranty is limited to repair or replacement of an instrument which is returned to an authorized service center within the warranty period and is determined upon examination by Fluke to be defective If Fluke determines that the defect or malfunction has been caused by misuse alteration abuse or abnormal conditions of operation or handling Fluke wili repair the instrument and bill the purchaser for the reasonable cost of repair If the instrumentis not covered by this warranty Fluke will if requested by purchaser submit an estimate of the repair costs before work is started To obtain repair service under this warra
5. USA California Fluke Service Center 46610 Landing Parkway Fremont CA 94538 TEL 510 651 5112 FAX 510 651 4962 Fluke Service Center 16715 Von Karman Avenue Suite 110 Irvine CA 92714 TEL 714 863 9031 FAX 714 757 7556 Florida Fluke Service Center 550 S North Lake Blvd Attamonte Springs FL 32701 5227 TEL 407 331 2929 FAX 407 331 3366 illinois Fluke Service Center 1150 W Euclid Avenue Palatine IL 60067 TEL 708 705 0500 FAX 708 705 9989 New Jersey Fluke Service Center W 75 Century Rd or P O Box 930 Paramus N J 07652 TEL 201 599 9500 599 0919 FAX 201 599 2093 Texas Fluke Service Center 2104 Hutton Drive Suite 112 Carroliton TX 75006 TEL 214 406 1000 FAX 214 406 1072 Washington Fluke Service Center Fluke Corporation Building 4 1420 75TH St SW M S 6 30 Everett WA 98203 TEL 206 356 5560 FAX 206 356 6390 INTERNATIONAL Argentina Coasin S A Virrey del Pino 4071 DEP E 1 1430 CAP FED Buenos Aires TEL 54 1 552 5248 FAX 54 1 551 1767 Australia Phillips Customer Support Scientific and Industrial 23 Lakeside Drive Tally Ho Technology Park East Burwood Victoria 3151 TEL 61 3 881 3666 FAX 61 3 881 3636 PN 850941 SERVICE CENTERS Phillips Customer Support Scientific and Industrial Block F Centrecourt 34 Waterloo Road North Ryde N S W 2118 TEL 61 2 888 0416 FAX 61 2 888 0440 Austria Fluke Austr
6. 10 250U 162008 73445 C2BOMAE 2 212 CAP ELECT 470 UF 10 75 164 501510 6793536 301510 2 C13 CAP ELECT 470 UF 10 475X 16V 201510 87536 501519 REF C14 CAP TA 10 UF 4 20X 15V 193623 56289 195D106X0015 1 REF C15 CAP TA 22 UF 20 15U 423012 36289 1960226X0015KA1 i C16 CAP ELECT 220 UF 10475 25U 484071 89336 484071 2 C17 CAP ELECT 220 UF 10 73 25V 484071 87336 484071 REF C18 CAP ELECT 22 UF 10 475 16V 436840 87336 436840 2 C19 CAP ELECT 22 UF 10 75 166 436840 87336 435840 REF C25 CAP CER 1000 PF 20 1004 147153 256289 CUCOZ3B101F103n 3 C26 CAP CER 1000 PF 20 100U 149133 36289 CO238101F103 REF C27 CAP T 2 2 UF 20X 204 161727 362079 1960226X0020HA l i C28 CAP POLYPROP 047 UF 10 100U 445773 89536 446773 1 C29 CAP MICA 180 PF 5 500U 148450 72136 DHi5FiBiJ i C30 CAP MICA 68 PF 5 500U 148510 72136 Dnl15F680J i C31 CAP MYLAR 047 UF 10 2304 162008 73445 UZ280n E B47K REF C32 CAP CERAMIC 1000 PF 10 309V 357806 356289 C01681026 102K 3 C33 CAP TA 10 UF 20 15V 193623 256289 1956D106X001561 REF C35 CAP CERAMIC 1000 PF 10 500U 357806 56289 CO16B1026 102K REF C36 CAP CERAMIC 1000 PF 10 500U 357806 56287 C01681026 102K REF C37 CAP CER 025 UF 20 1004 168435 256289 UC0238101H253n i C38 CAP ELECT 47 UF 20 10U 613984 87336 613984 2 C39 CAP ELECT 47 UF 20 10V 613984 89535 613984 REF C40 CAP MICA 330 PF 5 5004 148445 72136 Dair
7. change the second sentence FROM This error is called the burden voltage TO This voltage is called the burden voltage ERRATA 2 7 85 On page 2 3 following paragraph 2 21 add the following note NOTE A software error has been documented in the analog to digital converter display sequence of the proprietary integrated circuit U17 In all ranges and functions except negative de volts and conductance three exact counts 347 1 2 247 1 2 and 147 1 2 cause the most significant digit to occasionally display the next lower digit One condition a count of exactly 47 1 2 causes the display to occasionally indicate all zeros This anomaly does not affect the function or accuracy of the instrument 8050A ERRATA 3 On pages 5 8 and 601 8 Table 5 2 and 601 3 change R3 FROM R3 RES MTL FILM 1000 5 1 10w 514265 89536 514265 1 TO R3 RES MTL FILM 1000 05 1 10W 514265 89536 514265 1 On page 5 9 Table 5 2 add the static sensitive symbol to ul8 U19 and U20 On page 601 9 Table 601 3 add the following U17 IC C MOS SI N CHANNEL 40 PIN DIP 5249001 89536 524900 1 1 U18 IC SELECTED 8050A 4506 515999 89536 515999 i 1 U19 IC SELECTED 8050A 4506 01 516005 89536 5160051 2 1 U20 IC SELECTED 8050A 4506 01 516005 89536 516005 REF ERRATA 4 On page 4 7 Table 4 5 change the DISPLAY READING FOR steps 2 and 3 FROM 37 28 to 38 28 TO 37 63 to 37 93 CHANGE 1 274
8. the siemen S 1 Q Another unit of conductance is the mho Relative RELATIVE REFERENCE An input applied when the RELATIVE button is depressed to the ON position is held as 0 reference point Subsequent readings indicate the deviation from this point Note REL annunciator indicates when this mode is enabled RELATIVE ACCURACY Error will not exceed the sum of the errors of the two measurements ENVIRONMENTAL Temperature Coefficient 0 1 times the applicable accuracy specification per C for 0 C to 18 C and 28 C to 50 C 32 F to 64 4 F and 82 4 F to 122 F Operating Temperature 0 C to 50 C 32 F to 122 F Storage Temperature without batteries 40 C to 70 C 40 F to 158 F with batteries 40 C to 2 50 C 40 F to 122 F Relative Humidity oo o o ooomooo ooo Up to 90 0 C to 35 C 32 95 F up to 70 35 C to 50 C 95 122 F except on 2000 kN 20 MQ and 200 nS ranges where it is up to 80 0 C to 35 C 32 95 F GENERAL Maximum Common Mode Voltage 500V dc or peak ac low terminal potential with respect to power line around SIZO Home EDT TTE 22 cm x 6 cm x 25 cm 8 in x 2 x 10 in see Figure 1 1 Weight oou ES OL E S OP Nee fpei 1 08 kg 2 Ib 6 oz Power Requirements Line Only Models EINE VOLTAGE Wenn teilen 90 to 110V ac 47 to 440 Hz 105 to 132V ac 47
9. 1004 313283 89536 313283 2404 313271 87336 313271 1154 60Hz 312939 89536 312939 s TERHIMAL PINS 379438 89336 377438 iz ul RESISTOR NETWORK 201080 89536 301080 i i3 UZ RESISTOR NETWORK 212905 89534 512703 i i 4 LD RESISTOR NETWORK 313336 87536 213556 i i Ud RESISTOR NETWORK 313380 89536 313580 i i US RESISTOR NETWORK 319736 89534 5319734 i 1 Us IC RES 2 RESISTOR SHUNT 461491 287536 461471 i i UZ TC OP AMP DUAL COMPENSATED 8 PIN DIP 418564 18324 LI3SYM CR3 99 2 i Ug IC OPAMP DUAL COMPENSATED 8 PIM DIP 418566 18324 LH359M CR3999 REF 5 8 LIST OF REPLACEABLE PARTS Table 5 2 A1 Main PCB Assembly cont FLUKE MEG DESCRIPTION STOCK SPLY NO LOW POWER DUAL VOLTAGE COPIPARATOR LIGUID CRYSTAL 4 SEGMENT LIGUID CRYSTAL 4 SEGNENT LIQUID CRYSTAL DSPLY DRIVERS LIGUID CRYSTAL DSPLY DRIVERS LIGUID CRYSTAL DSPLY DRIVERS LIGUID CRYSTAL DSPLY DRIVERS LISUID CRYSTAL 4 SEGMENT SIs N CHARMEL 40 PIN DIP SELECTED 80504 4506 SELECTED 80506 4506 01 SELECTED 80506 4505 01 OPERATIONAL APP B0506 4504D C HOS GUAD BILATERAL SWITCH 14 PIN IC OPERATIONAL APP 80508 4304 VOLTAGE REGULATOR VOLTAGE REGULATOR RESISTOR NETWORK RECTIFIER BRIDGE RECTIFIER BRIDGE U3 IC LOW POWER DUAL VOLTAGE COMPARATOR 478354 01295 LI393N REF u32 HYBRID RMS TO DC CONVERTER 310683 87535 310683 1 33 RESISTOR NETWORK 213564 895236 2135364 i i 1134 RESISTOR NETWORK 319728 89536 519728 i 1 WRI DIODE ZENER 387217 389536 387217 H 1 wi
10. 331 i C41 CAP ELECT 10 UF 202 16U 614857 87336 614859 2 C42 CAP TA 10 UF 20 15U 193623 56289 196D106X001541 REF C43 CAP CER 1000 PF 20 100V 147153 56287 CUCO23B101F103n REF C44 CAP ELECT 10 UF 20 16V 614859 89536 614857 REF CLI DIODE FED CURRENT REGULATOR 393454 07910 TCR5290 1 i CRI DIODE SI RECTIFIER 2 AMP 50 VOLT 34 559 14079 1N5400 2 i CR2 DIODE SI LO CAP LO LEAK 348177 207263 FD7223 3 i CRI DIODE SI LO CAP LO LEAK 348177 07263 FD7223 REF CR12 DIODE SI LO CAP LO LEAK 340177 07263 FD7223 REF rei SPRING COMPRESSION COIL 422824 83553 C00240 025 0500 5 i m2 SUPPORT HYBRID TO U32 215635 875 515635 APS SUPPORT RESISTOR 345079 89536 545079 i n7 CLIP COMPONENT 216880 89536 516880 2 PS SPACER SUAGED 323154 87336 525154 4 MP SPACER STANDOFF 295089 87536 295089 2 Gi ASTR SI NEN 218396 87536 218396 3 i G2 XSTR SI MN 218396 89536 218396 REF G3 XSTR SI NPN METAL 329698 89536 329698 i i G4 XSTR SI PNP 222397 07263 ZW4250 2 i 87 ASTR FIELD EFFECT FET 370072 89536 370072 2 i G8 ASTR FIELD EFFECT FET 370072 87336 370072 REF 811 XSTR SI PNP 195974 04713 23906 t 1 912 XSTR SI NPN 168716 07263 517254 i i RIA ASTR SI PMP SELECTED 300374 87336 380394 3 1 415 XSTR SI PNP SELECTED 380394 89536 380394 REF 16 XSTR Si PHP 223577 97263 24250 REF 617 ASTR SL PRP SELECTED 380394 89536 380394 REF 818 XSTR SI NPN 218396 89536 218396 REF 9 7 LIST OF REPLACEABLE PARTS Table 5 2 Ai
11. 4 5P1K 485052 UR251 4 5P470K EB4711 CR251 4 5p1n CR251 4 5P1l CF SSS 902F CR251 4 5P15K CB4755 CR251 4 5P15K CHE 552323 CR251 4 5P6B0E CR251 4 5p27K CR251 4 5Pp750K CR251 4 5P100E CBa755 CR251 4 5P27K CR251 4 5PBK2 CR251 4 5P15K CR251 4 5P27K CR251 4 5pP20E 145415 CB4755 CR251 4 5P1n CR251 4 5p 47 0K CR251 4 5P1E 180910200 VOZ VASOPnAT B QR AG RR 22 30 mt pi pe geb pad pea ena Ka EMA pee Ka Ka rA Ka M Bra Kaka poed K e 9 28 va ra a ra a de Kk bes tee Li OPTIONS RECHARGEABLE BATTERY 01 OPTION Table 601 3 A1 Main PCB Assembly ori DESCRIPTION VARISTUR SWITCH ASSEMBLY TCH TRANSFORMER BATTERY MODEL FPR DC DC BATTERY MODEL TERMINAL PINS RESISTOR NETWORK RESISTOR NETWORK RESISTOR NETWORK RESISTOR NETWORK RESISTOR NETWORK C RES 2 RESISTOR SHUNT OP AP DUAL COPPENSATED S PIN DIP GP AMP DUAL COMPENSATED 8 PIN DIP LOS POWER DUAL VOLTAGE COMPARATOR CRB LIGUID CRYSTAL 4 SEGMENT CORS LIGUID CRYSTAL 4 SEGHENT C 08 LIGUID CRYSTAL DSPLY DRIVERS U13 IC CAOS LIGUID CRYSTAL DSPLY DRIVERS 507976 02735 CD40568 REF U14 IC C 108 LIGUID CRYSTAL DSPLY DRIVERS 507376 02733 CD40S548E REF UIS IC CRB LIGUID CRYSTAL DSPLY DRIVERS 507376 02735 CO40S48E REF UiS IC C HMOS LIGUID CRYSTAL 4 SEGMENT 453225 02735 D40548E REF Uzi IC OPERATIONAL AP 8050A 4504 607883 37736 607083 z i U22 00 IC C TIOS QUSD BILATERAL SWITCH 14 PIN 363838 120
12. 999V input The maximum negative input voltage that could be measured without overranging is 4 999V which would cause the relative display reading to be 19 999V REL OPERATION DIODE TEST DIODE TEST kO 1 DE ENERGIZE CIRCUIT TO BE MEASURED 2 SELECT Range 2 range preferred 3 SELECT FUNCTION 4 CONNECT TEST LEADS HIGH RYE RMS N LOW N A che L sS 2009S um ee RELATIVE POWER QN OFF osoa lucrar MULE Figure 2 7 Diode Test Operation 2 9 OPERATION RELATIVE RELATIVE RELATIVE 1 Select range and function use any measurement range and function HN p nl m 200 mV 2 1 206 idc Bc Nav 007A 2 20 200 2000 Ck 200 200 2000 2080 O COLLERA OG mn apte dBMAXP m Done A 2A i 2 Connect test leads and take the desired measurement to be used as the relative reference While taking the relative reference measurement set the RELATIVE switch to ON This will store the value as the relative reference Measuring the relative reference i pie E 3 Subsequent measurements wili be displayed as the difference between the relative reference and measurement See insert PAPER RP tt lt de ge o OH U L LS UM Pp Une 4 To cancel the relative function set the RELATIVE switch to OUT Figure 2 8 Relative Operation 2 10 OPERATION DECIBEL 2 36 Decibel dB 2 37 Figure
13. APPLICATIONS 2 co eR RE Cone eased bu ahha PU ieee Bd oes 2 12 2 43 DC Voltage Measurement coss eda Rb ERA IER ERES 2 12 2 51 Current Measurement erkenne 2 13 2 56 Resistance Measurement Loss e ru 2 13 2 62 Conductance Measurement as 2 14 2 80 Relative Measurement a Cala 2 16 2 84 AC Voltage and Current Measurement 2 16 THEORY OF OPERATION cccccccccecccccececcevecvcses 3 1 3 1 INTRODUCTION ae c 3 1 3 3 FUNCTIONAL DESCRIPTION 2 cccccscccuscccerecceces 3 1 3 5 CIRCUIT DESCRIPTION 2 rere e ER d VERE 3 1 j continued on page ii TABLE OF CONTENTS continued SECTION TITLE PAGE 3 7 A D Converter eiut quote ae FERA KW SE hea aw sa aet 3 1 3 18 Microcomputer nf RRR E a Pome See dal Ad ANA 3 2 3 20 Signal Conditioning ira tt id uiter CU E QN MAR Ra MEA 3 6 3 31 Tr e R MS Converter irs eX x E aa EYE rs e t 3 8 3 38 Toueh Hold Circuit sales KR a REL her oa Nae ber ci y 3 8 3 40 Voltage Protection dis ar X RR a sotsa ae EC A oi gin re 3 8 3 43 Current Protection da zs yu EE Rex we RES Va PERE SESE Nice 3 8 4 MAINTENANCE asia cara Ack Re ee ORA EE RERO 4 1 4 1 INTRODUCTION ordos ee 4 1 4 4 SERVICE INFORMATION sauer ai eas 4 4 7 GENERAL INFORMATION Zee ei 4 1 4 9 Interior ACCESS Li ir AA A As 4 1 4 24 dB Reference Impedance Power Up Setting oooomomomoom 4 4 4 26 Cleaning eos etd os CHEER va MES RUE RA T AU E EROR RE A 4 5 4 28 PERFORMANCE TESTS Loud sees ta ta ee ka Ex nn 4 5 4 30
14. FROM LEFT SIDE OF 8050A NO JUMPERS INSTALLED JUMPER CONFIGURATION FOR AC CALIBRATION RMS CONVERTER U32 CALIBRATION NETWORK U33 4 12 MAINTENANCE TROUBLESHOOTING Table 4 12 Test Poinis TEST POINT FUNCTION TEST POINT FUNCTION T COMMON A D Converter Integrator Output 2 13V First AC Buffer Output 3 or CR 12 Cathode 6 V Second AC Buffer Output 4 5V RMS Converter Output 5 10V Display Back Plane Drive 50 Hz Square Wave A D Converter Input A D Converter Buffer Output Integrate Control Line 4 13 MAINTENANCE TROUBLESHOOTING Table 4 13 Troubleshooting Guide TEST AND SYMPTOM POSSIBLE CAUSE INITIAL TURN ON Display Blank Display stuck with a constant reading Reads overload for several minutes after turn on DISPLAY TEST All segments on All or no decimal points Decimal point in wrong location 1 or more digits missing 1 or more annunciator missing LINEAR VOLTAGE TEST Display reading is out of tolerance Constant overrange in DC V Does not respond to input voltages Does not range properly in AC V dB VOLTAGE TEST Does not go into dB Does not autorange Display reading is out of tolerance CURRENT TEST Does not respond to input currents Display reading is out of tolerance on 1 or more ranges RESISTANCE CONDUCTANCE TEST Reading is out of tolerance on 200Q and 2 kQ range Reading is out of tolerance on other ranges Readings are out of tolerance on high ohms Readings are n
15. HIGH VOLTAGE PROBES Figure 600 5 Probe Accessories 600 5 ACCESSORIES PROBE ACCESSORIES Table 600 1 Probe Accessories Specifications 80T H TOUCH HOLD PROBE Voltage Ratings TIP TO COMMON 1000V dc or peak ac maximum COMMON TO GROUND 60V dc or 42V peak ac maximum input Capacitance 150 pF maximum Lead Resistance 0 5Q maximum 80T 150C AND 80T 150F TEMPERATURE PROBES Range CIF usos besar COE o 50 C to 150 C 58 F to 302 F ACCUIBOM ia eh kx ea or is 1 C 1 8 F from 0 C to 100 C decreasing linearly to 3 C 5 4 F at 50 C and 150 C Sensitivity 2 0 0 cee eee eee ee eens 1 mV de C or F Resolution cus voro cer ew dean 0 1 C or 0 1 F recommended maximum Voltage Standoff uuuuuu 350V dc or peak ac POWER cues Ubi aa pct ORAS Internal disposable battery 1 000 hours of continuous use 801 600 CURRENT TRANSFORMER RARE sco Seles eg oe Peas cant 1 to 600A ac ACGUIBCY bc Ta tote eu yen RC CORO ERA 13 Frequency Response 30 Hz to 1 kHz 10 KHz typical Division Ratio uuuuesn 1000 1 Working Voltage 750V rms maximum insulation Dielectric Withstand Voltage 5 kV Maximum Conductor Size 2 inch diameter 80J 10 CURRENT SHUNT SPLINE I ences wane Mas he boe Lane P Cc 10 amps at 100 mV Accuracy 18 C to 28 C DETO TU KFZ qt aru NS 0 25 10 KHZ 100 KHZ al vs Rising to 1 dB at 100 kHz typical Temperature Coefficient 0
16. Initial Procedufes 3 4 2 ra a KEES CER NEMORE ES qe ea e 4 5 4 32 Display Test ms nase 4 5 4 34 Linear Voltage T l orinal ds 4 6 p 4 36 dB Voltage Test idisse box IN e E dS KR e KE 4 6 4 38 Current Test aa eher 4 7 4 40 Resistance and Conductance Tests 0 0 2 cece cece reese ee enee 4 000 d 4 42 CALIBRATION ADJUSTMENTS i e haare hon 4 8 4 44 DC Calibration sun PERS 4 8 4 46 AC Calibration sans ebene aa a ee 4 8 4 48 Jumper Selection oooooo o Lawak haunt meee dius 4 8 4 57 TROUBLESHOOTING N dr Veo 4 12 5 LIST OF REPLACEABLE PARTS cece cc cece eee hn 5 1 TABLE OF CONTENTS 42256 o orbs D ROCA RERO CR TERR RATE ee 5 1 5 1 INTRODUCTION schnelle 5 2 5 3 PARTS ORDERING INFORMATION LL cc cece cece ee nnn 5 2 6 OPTIONS AND ACCESSORIES sse mene 6 1 TABLE OF CONTENTS stossen 6 1 INTRODUCTION gt ici ER VR RR EORR CARE Seen eee 6 2 ACCESSORIES rz uicem ue exa ex L a ee e OE ea NS 600 1 OPTIONS lcuccuhd C Cer oe Ne e TT 601 1 7 SCHEMATIC DIAGRAMS cc cee ce tee hh mma hann 7 1 TABLE OF CONTENTS 22 2 en a E RRR a 7 1 APPENDIX A teren Sa e e Go ar so kde S dedos A 1 List of Tables TABLE TITLE PAGE 1 1 BOSQA Accessories escri sn AA T ts odo 1 2 1 2 8050A Specifications taka nesses ang ase de keine ea aerr icis Xv es 1 2 2 1 8050A Controls Indicators and Connectors 0ooorcconoorcnccorco cos 2 3 2 2 Maximum Input Signal Limits ob a eue el Exe road rk ice 2 5 3 1 A
17. LIMITS CAUTION Exceeding the maximum signal input limits can damage the instrument T86y AC 060v DE ii 000 AEA 00 2900 20M0 Figure 2 1 Controls Indicators and Connectors 2 2 ITEM NO NAME OPERATION OPERATING TECHNIQUES Table 2 1 8050A Controls Indicators and Connectors Display AC DC Function Switch V mA KQ dB S Function Switches Range Switches mA Input Connector COMMON input Connector V KQ S Input Connector RELATIVE Function Switch FUNCTION 4 digit LCD display Used to indicate measured input values and an overrange condition Also contains annunciators for high voltage decibel display and relative measurement functions A two position switch push IN and push OUT used to select ac IN or dc OUT for current or voltage measurements Interlocked switches used with the AC DC Function switch to select the measurement functions Pushing one switch will release the others The decibel display function is selected by pushing the V and mA switches simultaneously The conductance function is selected by pushing the kQ switch and one of two pairs of Range Function switches Interlocked switches that select the measurement ranges Pushing a switch selects the corresponding range and releases a depressed switch es A fuse protected input connector for current measurements Fuse is accessible from the front panel Test lead connector used as the low or common input for all
18. Main PCB Assembly cont MEG DESCRIPTION SPLY MFG PART NO NO CODE G1 XSTR FET DUAL N CHAMMEL 419203 87736 417283 i i Ri RES COMP 100K 10 18 109397 01121 681041 i R2 RES M 1000 10 Zu 4 4080 87336 474080 i R3 RES MTL FILM 1000 5 1 7109 314265 89536 514265 i R5 RES CER 100K 10 1 28 327077 89536 527099 i R RES VAR 100 10 1 28 327115 89536 329115 i R7 RES VAR CER 1K 10 1 24 213259 89536 513239 i RO RES COMP 220K 10 ZU 110197 01121 HB1011 i Ril RES UAR CER 500 10 1 28 447730 89536 447730 i R12 RES CERPET 200 10 1 28 4 4973 899536 474973 i R14 RES DEP CAR IM 5 1 44 348987 80031 CR251 4 5P1nM 4 R15 RES DEP CAR 20 3 1 4M 442202 80031 CR251 4 5P20E i Ri RES MIL FILM 900 0 1 1 84 461988 97159 MF33701 i R17 RES MTL FILM 90 0 1 1 84 461970 91637 CHFS5902 i R18 RES Ud 15X 184 461962 877336 451962 1 R1 RES COMP 100K 3 ZU 285056 87536 285056 i R20 RES COMP 2 2 10 1 28 108225 89536 285056 i R21 RES COMP 22M 5X 1 4M 221984 01121 B2245 1 R22 RES DEP CAR 100 3Z 1 44 348771 80031 CR251 4 5P100E 3 RZ3 RES DEP CAR 100 5 1 44 3480771 80031 CR251 4 5P100E REF R24 RES COW 4 70 5 1 4M 220044 01121 UB4 55 4 R29 RES VAR iff 2 10 1 2M 485052 89534 485052 i R30 RES DEP CAR 470K 5X 1 4M 342634 80031 CR231 4 5P470K i R32 RES DEP CAR iM 5X 1 4M 348987 80031 CUCR251 4 5PihM REF
19. R RES DEP CAR i T 1 48 340987 20031 CR251 4 SPiA REF R36 RES DEP CAR 15K 3X 1 4 3488054 80031 CR251 4 5P15K i R37 RES COMP 4 7 5X 1 44 220046 01121 CB4755 REF R38 RES DEP CAR 15K 5Z 1 4M 348854 80031 CR251 4 SP15K REF R39 RES MTL FILM 232K 1 1 80 276618 91637 CMFSS2323 i R40 RES DEP CAR 680 3 1 44 368777 80031 CR2510405P680E i R42 RES DEP CAR 27K 5 1 44 441501 80031 CR251 4 5p27K i R43 RES DEP CAR 750K 3 1 08 442525 80031 CR251 4 50750K i R44 RES DEP CAR 100 t 5X 1 4 348771 80031 CR251 4 3P100E REF RES RES COMP 4 71 4 5 1 4 220046 01121 CB4755 REF R46 RES FXD 24K 3 1 44 442384 80031 CUCR251 4 5P24K i R48 RES DEP CAR 15K t 5x 1 44 348854 80031 CR251 4 5P15K REF R49 RES DEP CAR 27K 3 1 4M 441501 80031 CR251 4 5P27K i R52 RES COMP 476 10 1 24 146415 89536 146415 i R53 RES COMP 4 7H 5 1 44 220046 01121 CB4 55 REF R34 RES DEP CAR 1 5z 1 4 348787 80031 UR251 4 5P1n REF R55 RES DEP CAR 470K 3 1 44 342634 80031 CR251 4 5P 470K 1 R54 RES CAR DEP 1 4 5X 1 44 357665 80031 CR251 4 5P1E 1 RTI THERMISTOR 445849 50157 180010200 i i RVI VARISTOR 447672 09214 V430MA7 3 3 RUZ VARISTOR 447672 09214 V430MA7 REF RV3 VARISTOR 447672 07214 V430nA7 REF 51 510 SWITCH ASSEMBLY 307707 89536 507707 S11 SWITCH 473736 89536 473736 2 12 SWITCH 4 3736 89326 473734 REF Ti TRANSFORMER POWER ORDER FOR APPROPRIATE VOLTAGE i 1204 212939 987336 512737
20. SCREW PHP 6 32X1 2 320051189536 32005112 TO H2 SCREW PHP 6 32X1 2 853770189536 185377012 ERRATA 7 On page 4 8 paragraph 4 51 step 1 change reference of MP20 to MP31 On page 4 9 Figure 4 2 CHANGE MP20 CHANGE MP21 TO MP32 TO MP31 On page 4 10 paragraph 4 53 step 1 change reference of MP21 to MP32 5 93 ede SECTION 1 Table of Contents TITLE PAGE INTRODUCTION AND SPECIFICATIONS 0c cece e ee 1 1 1 1 INTRODUCTION EEE E a re 1 1 1 4 OPTIONS AND ACCESSORIES cccccccecccvcsccecrracces 1 1 1 5 SPECIFICATIONS dadas ROME 1 1 OPERATION 22 TTT 2 1 2 1 INTRODUCTION E 2 1 2 3 SETTING UP YOUR INSTRUMENT 2 1 2 4 Unpacking see bw VER EE ebbe aeta RES 2 1 2 8 AC Line Voltage Requirements uusrssoronaresrrarrorerena 2 1 2 10 Dise Peplacenienturtod eroe O 2 1 2 13 FRONT PANEL FEATURES run Ra 2 2 2 15 SA Yao la vare ease a Deed ar p DAE 2 2 2 18 SIGNAL INPUT LIMITS qu45 Eu Cus duas ERN VR VOLES eI A YA SS 2 2 2 20 OPERATING TECHNIQUES dto a 2 3 2 22 AC DC Voltage V PRL RA a Ea rx EXE We Dira 2 3 2 24 AC DC Current mA Was cu en ee PED A VA E asa S 2 3 2 26 Resistance C osos dest Ded we oe es WG ETE EE En 2 7 2 28 Cofductanee S 10 nasser 2 7 2 30 Diode Test a a dts Ease sere b Es ds ME vi at a 2 7 2 32 Relative RELATIVE daa 2 7 2 36 Decibel dB a bee 2 11 2 38 INITIAL CHECKOUT PROCEDURE cccecccccueues 2 12 ZA
21. dB function on the 8050A then set the RELATIVE switch to ON in 13 Verify that the dB and REL annunciators are illuminated 14 This concludes the Display Test Remove power from the DMM Calibrator before dismantling the test setup 4 5 MAINTENANCE LINEAR VOLTAGE TEST 4 34 Linear Voltage Test 4 36 dB Voltage Test 4 35 Use the following procedure to verify the proper 4 37 Use the following procedure to verify the proper operation of the ac and dc voltage measurement operation of the dB voltage measurement function functions 1 1 Complete the Linear Voltage Test Connect the DMM Calibrator to the 8050A as follows HI to the V kQ S input connector and LO to the COMMON inp t connector 2 Select the AC dB function 200mV range For each step in Table 4 4 select the switch 3 Connect the DMM Calibrator to the 8050A as positions shown and adjust the DMM follows HI to the V kOQ S input connector and Calibrator to the required 8050A voltage input LO to the COMMON input connector level and frequency then verify that the 8050A display reading is within limits 4 For each step in Table 4 5 adjust the DMM Calibrator to the required 8050A voltage input level and frequency then verify that the 8050A display reading is within limits This concludes the Linear Voltage Test If desired proceed directly to the dB Voltage Test Table 4 4 Linear Voltage Test UUT SWITCH STEP POSITIONS poe DISPLAY 4
22. eb SPOOF KA PON RMAS S VIE NOLLYAINP LNA AOR JOY TES NULSYOD ING ADES ONE ADO Ree ww A LIPO LOL ly si a DAC Sd uoa 2neuieuos Ajquiessy god WEN Lv 4 anbi dO IHL WOUS 2 40 z Q3M31A HILIMS 100L v0S08 afle ally aNnou WLIDIG ATddNS Y3MOd ZA i o oh INNOYD IVNDIS 9OTVNV ZX at RE GNNOY9 3SN3S DOWNY A o aly o d t i genri S bs 5 1 ee 4 ig TAST 94 A IG EU OY ze M T o sd cen bong wer T 92 ziel aas TE Op 00L ba qued 82 ARA APA zene FI y N 1 g Uu Cuv TAZA ob nfo ole e i LZ zen UN b U a ler 9 i gt ER OS CE 3 O k zens at F royi To GOlGn 8 Si 4 ve E BEIT gg 3 eea Danus E 55 amp LE pas ld mni 94 OY iion Ld B 10 c H H gt V P zednm b 2 Tl 0 0 6 9 5 E bt 4r u if EN 7 s IM t In d 9 amp I s r SE E 3 91 10 5 S WINE Ln T A 9 PUT A S HY SY 29 99 et sofana i l bd yu En go ez Xop 195 asd C Y UE 27 5 un Se yoo SIH KR NOLLNVO SAVYUDVIO OLLVINIHOS 9 1 o uondo Moeg Ajquiessy god uie Ly p d anba LEQL YOSO8 2 3HflOld 33S AVHOVIO OLLVIN3HOS HOS f armasmi e lom row Cixva TRONS ADO Sd sin in an un 1 P BEA L ae Nr as 1 Lt AL AHIHI 21919 A8 JOVINYO OL 1930808 NOLLNVO E Tt NAA Tree SAVUDYIG OLLVIN3HOS
23. estimate of the cost to repair shipment damage Fluke will be happy to answer all questions to enhance the use of this instrument Please address your requests or correspondence to Fluke Corporation P O Box 9090 Everett WA 98206 9090 Attn Sales Department For European Customers Fluke be B V P O Box 1186 5602 B D Eindhoven The Netherlands 9 93 CHANGE ERRATA INFORMATION ISSUE NO 6 5 93 This change errata contains information necessary to ensure the accuracy of the following manual Enter the corrections in the manual if either one of the following conditions exist 1 The revision letter stamped on the indicated PCB is ah to or higher than that given with each change 2 No revision lester is indicated at the beginning of the change errata MANUAL Title 8050A Print Date October 1979 Rev Date 2 7 84 C E PAGE EFFECTIVITY Page No Print Date 1 7 85 2 9 88 3 5 93 ERRATA 1 On page 1 1 paragraph 1 2 change the following sentence FROM o Conductance measurements up to 100 000 M TO o Conductance measurements up to 100 000 M equivalent On page 2 6 Figure 2 4 change item 5 FROM PLACE 8050A m SERIES TO PLACE 8050A IN SERIES On page 2 12 change paragraphs 2 43 and 2 44 to read 2 43 Voltage Measurement 8050A resistance 2 44 The following paragraphs contain additional information on the measurement techniques for voltage measurements On page 2 13 paragraph 2 54
24. inputs CM is positive so the microcomputer uses the DE R de integrate minus reference command during the READ period This connects C7 so that its polarity is reversed as it must be to discharge C9 3 15 The bottom set of waveforms in Figure 3 3 shows the timing that results from a positive overrange input to the DMM If the count in the microcomputer reaches 20 000 before CM toggles the microcomputer detects this as an overrange condition and issues the overload OL command for 5 millisecond The OL signal shorts C9 dumping the remaining charge The following Autozero period is doubled to 200 millisecond The polarity of the overrange input signal is retained and displayed NOTE The display indicates an overload between 20 000 and 20 055 counts but the a d converter continues to integrate normally and OL indicator does not appear 3 16 The a d reference scheme is different if either the kN or S functions are selected When the2 mS 2000 or2 k range is selected flying capacitor C7 is charged during 3 2 the Autozero period by the voltage drop across the reference resistor instead of the a d converter reference voltage source In kN during the Integrate period the voltage drop across the unknown resistance is integrated During the Read period the buffer input is connected to COMMON and C7 is connected in the feedback loop of the buffer Therefore the count accumulated in the microcomputer during the Read peri
25. is accomplished with an input voltage divider network The division factor of the network is determined by the range selected 1 100 for the 20 and 200V ranges 1 1000 for the 1000V dc 750V ac range If the AC DC switch isin the AC position the output of the divider network will be routed through the true rms converter to the a d converter If the AC DC switch isin the DC position the output of the divider network is routed directly to the a d converter If the k Y switch is 3 6 selected ohms or conductance the input divider resistors are used as the reference resistors 3 24 CURRENT SIGNAL CONDITIONING 3 25 As Part B of Figure 3 5 shows current measurements are made using a selected value current shunt to perform the current to voltage conversion required by the a d converter The range switches determine the value of the current shunt thus determining the scale of the voltage level developed across the shunt If the AC DC switch is in the DC position the output of the current shunt is applied to the input of the ajd converter If the AC DC switch is in the AC position the voltage level developed across the shunt is applied to the input of the rms converter 3 26 RESISTANCE CONDUCTANCE SIGNAL CONDITIONING 3 27 Resistance and conductance measurements made on the 2 mS 2000 and 2 kO ranges use a direct ratio technique Other ranges use a subtraction and ratio technique to indirectly derive a ratio U 1 INPUT DIVIDER
26. kHz to 100 MHz 1 dB Extended Frequency Response Useful for relative readings from 20 kHz to 250 MHz Response ici a a Responds to the peak value of an input and is calibrated to read rms value of a sine wave Voltage Range oooooooooooooso 0 25 to 30V rms Maximum Input Voltage 30V rms 200V dc input Capacitance Approximately 3 pF Temperature Range OPERATING ius arse da 1096 to 35 C STORAGE Goode sioe e E iis 40 C to 75 C Humidity Soi ti lt 80 R H Output Connector occommoccoc Fits standard 0 75 inch dual banana connectors ACCOSSOIV Soi ra eas BNC to Probe Adapter P N 574756 85RF HIGH FREQUENCY PROBE AC to DC Ratio 0 ec eee 1 1 Ratio Accuracy At 1 MHz and loaded with 10 MQ ABOVE QIN sarral vt kx axa RE bet 0 5 dB BELOW 05V cid OA Frequency Response Relative to 1 MHz 100 kHz to 100 MHz 5 dB 100 MHz to 200 MHz 1 0 dB 200 MHz to 500 MHz 3 0 dB Referred to high and low inputs at probe tip Extended Frequency Response Useful for relative readings from 20 kHz to 700 MHz Response zs n yr ns Responds to the peak value of an input and is calibrated to read rms value of a sine wave Voltage Range sss 0 25 to 30V rms Maximum Input Voltage 30V rms 200V dc Input Capacitance Approximately 3 pF Temperature Range OPERATING era ee TW10 C to T35 C STORAGE dor Vie evi Xa d bol 40 C
27. measure ment functions Test lead connector used as the high input for ail voltage resistance continuity conductance and decibel measurement functions Push on push off switch Used to select the relative function for all measurements POWER Switch Push on push off switch Used for energizing and de energizing the instrument 2 19 Before using the 8050A it is important to note the 2 22 AC DC Voitage V maximum input limits that may be applied to the 2 23 instrument Table 2 2 lists the maximum signal input levels allowed for each function range and input connector Figure 2 3 describes how to operate the 8050A for ac or dc voltage measurements For all measurements select the highest range that will provide the required resolution of the measurement If measuringan unknown voltage set the DMM on the highest range then if WARNING needed select a lower range 2 24 AC DC Current mA 2 25 Figure 2 4 describes how to operate the 8050A for ac or dc current measurements Turn off power to the circuit being measured before breaking the circuit and connecting the 8050A in series with the current source To minimize common mode voltages break the circuit on the ground side of the current source The mA input connector contains an in line fuse If the DMM does not TO AVOID ELECTRICAL SHOCK DO NOT CONNECT THE COMMON INPUT CON NECTOR TO ANY SOURCE MORE THAN 500V DC OR 500V AC RMS ABOVE EARTH GROUND 2 20 OPERA
28. of the 8050A can be used to measure high resistive low leakage components diodes and capacitors while minimizing noise problems The two conductance ranges 2 mS and 200 nS can be used for making resistance measurements from 5000 to 10 MN and 5 MQ to 100 000 MO 2 66 LEAKAGE RESISTANCE MEASUREMENTS 2 67 Use the standard conductance function for leakage testing on purely resistive components e g cables and pcb s Remember to zero the display reading with the relative function before taking conductance measurements NOTE Under high humidity conditions finger prints and other residual surface contaminants can create their own leakage paths Use clean test leads to minimize the effect of leakage paths OPERATION CONDUCTANCE MEASUREMENT 2 68 DIODE LEAKAGE TESTS 2 69 Diode leakage Ir tests require that the diode junction be reverse biased while being measured Connect the anode of the diode to the COMMON input connector to reverse bias a diode junction A good silicon diode will produce an in scale display reading on the 200 nS range when reverse biased 2 70 TRANSISTOR TESTER 2 71 The transistor tester described in the following paragraphs provides approximate test information Beta is tested using a Vce of 2V and an Ic of about 200 yA This transistor tester is useful for checking the proper operation of transistors and approximate beta values for comparative measurements 2 72 The transistor tester fixtur
29. the container 2 7 Remove the 8050A from the container and place it in a convenient location To facilitate operation in different locations the carrying handle on the meter can Section 2 Operation be used as a prop stand or positioned out of the way To position the handle pull outward on the hubs of the handle and rotate the handle into position 2 8 AC Line Voltage Requirements 2 9 AC line voltage requirements for your 8050A are listed on a decalattached to the bottom of the instrument Refer to Section 4 for the procedure to change the ac line voltage setting CAUTION Do not connect the power cable to the instrument before verifying that the intended source matches the ac line configuration of the instrument 2 10 Fuse Replacement 2 11 There is one user replaceable fuse in the 8050A The fuse F1 and the fuse holder form an integral part of the mA input connector and can be removed without special tools The fuse rating is 2A normal blow recommended part AGX2 2 12 Use the following procedure to replace the fuse Fi 1 Set the POWER switch to OFF 2 Remove the input power cord from the 8050A WARNING DO NOT ATTEMPT TO REPLACE THE FUSE WITH THE INSTRUMENT TURNED ON OR CONNECTED TO LINE POWER 2 1 OPERATION FRONT PANEL FEATURES 3 Refer to Figure 2 1 item 5 for the location of the fuse holder The fuse holder is an integral part of the mA input connector 4 Using a c
30. to 440 Hz 200 to 264V ac 47 to 440 Hz Factory configured for customer specified voltage POWER CONSUMPTION Standards 1 5 INTRODUCTION SPECIFICATIONS 8 55 in 21 72 cm 10 65 in 27 05 cm 7 50 in 19 05 cm 9 90 in 25 15 cm Figure 1 1 8050A Dimensions 2 1 INTRODUCTION 2 2 This section describes how to set up and make measurements with your 8050A Even though you may have used a multimeter before we recommend that you read the entire section carefully so that you can use all of the 8050A features i 2 3 SETTING UP YOUR INSTRUMENT 2 4 Unpacking 2 5 This instrument is shipped in a special protective container that should prevent damage to the 8050A during shipping Check the shipping order against the contents of the container and report any damage or short shipment to the place of purchase or the nearest Fluke Technical Service Center A list of these service centers is located in Section 5 The container should include the following The 8050A Multimeter Two test leads one red and one black e Line power cord The 8050A Instruction Manual 2 6 Ifreshipment of the instrument is necessary please use the original shipping container If the original container is not available be sure that adequate protection is provided to prevent damage during shipment We recommend that the instrument be surrounded by at least three inches of shock absorbing material on all sides of
31. with the RELATIVE 2000 EFD 2008 POMS CIRCUIT function taking conductance measurements see Relative Measurements Figure 2 6 Conductance Operation 2 34 Refer to the sample displays in Figure 2 8 If the range changes the 8050A automatically multiplies or divides the relative reference by the appropriate power of ten before subtracting the relative reference from the measurement If the function is changed the REL annunciator disappears and the relative reference is stored with the original function When the original function is reselected the relative reference is restored and the REL annunciator appears unless a new relative reference was selected Setting the RELATIVE switch to OFF or turning the instrument off cancels the original relative reference 2 35 The relative function may be used with all measurement functions ac or dc voltage ac or dc current 2 8 ac or dc dB resistance and conductance Note that input overload limits are not changed by the use of the relative function Also when using the relative reference function the display limits do not change The possible readings are still subject to the limits of the 19999 counts of the a d converter regardless of the relative reference For example if a dc voltage measurement of 15 000V is made on the 20V range and stored as a relative reference the maximum positive relative voltage that could be displayed without overranging is 4 999V 19
32. 0 259 o o o 0000 90 u G 00 0 0 00 o Q Q 00 0 00 o o oo 96 0009 o IMPEDANCE al 2 r eye e Figure 4 2 Calibration Adjustment Locations MAINTENANCE CALIBRATION ADJUSTMENTS Table 4 8 DC Calibration VOLT Tele ADJUST DISPLAY LIMITS 1 9000V 200 mV 190 00 mV 200 V 190 00V 1000V dc 1000 0V 41 9000 exactly Cc 190 00 exactly 190 00 exactly 1000 0 exactly If R11 can not be adjusted to the DISPLAY LIMIT refer to the UB jumper selection procedures in Section 4 of this manual Table 4 9 AC Calibration 8050A VO TAGE neu INPUT STEP RANGE EVE ADJUST DISPLAY LIMITS 1 8995 to 1 9005 gt gt R29 0999 to 1001 R7 and R29 are interacting adjustments Repeat until both are within their limits 1 9000V 2 2V 100 0 mV 2V Short circuit 20V 19 000V 200V 100 00V C1 and C2 are interacting adjustments procedure in Section 4 of this manual gt If the display is not within limits in step 3 or R29 is outside adjustment range procedure range refer to the RMS Converter Offset Adjustment procedure in Section 4 of this manual 7 Turn on the DMM Calibrator 8 Compare the 8050A display to the LOW and HIGH display readings in Table 4 10 and find the DISPLAY READING that the 8050A display is between Cut out the portion of the jumper as shown under the JUMPER CONFIGURATION heading that corresponds to the DISPLAY READING 9 Perform the Calibration Adjustments 4 52 U33 JUMPE
33. 00 611 M00 200 612 M00 200 613 80T H 80T 150C 80T 150F 801 600 80J 10 80K 6 80K 40 83RF 85RF Y8100 Y8101 Y8134 Y8140 QI ra F Section 6 Options and Accessories TABLE OF CONTENTS DESCRIPTION PAGE ACCESSORIES Soft Carrying Case OX ERE Cae v Sd LER EAN ne d RR a 600 1 Ruggedized Carrying Case AAA 600 1 Offset Mounting Kit ir oasis 600 2 Center Mounting Kit uu usus aan elon te AE e 600 2 Dual Mowing TTT 600 3 Touch Hold Probe aaea E ER ones eee Rap d ea E EE 600 4 Temp rature Probe PO visa tae hace DF Ae 600 5 Temperature Probe E uas casui e EXE E aae CCS ier ea 600 5 C rrent TEABSIOTMER zen 26 5 a rac vo ween T died OE RUN kaa we 600 5 Cunent SOU ce eed as v UI RENE GENE Oeo M Re E NT 600 5 Hih Voltage Probe rs addu ee aa 600 5 High Voltage Probe lt a oo M cios adest 600 5 TS 600 5 wed Ln Lanes e tdt R dae e ow ates oe ase N a 600 5 DCIAC Current Probe caa S tc vesc oes ae ra ia e oe md qu d 600 5 AC Current Transformer uu usa iw er oO QUOC REIR Jus 600 5 Deluxe Text Lead Kit safety designed eere 600 5 SUMSFIER Test Leads osa tad e A o E ERES Cha e 600 5 Rechargeable Ni Cad Battery Option 0 cece enter nenn 601 1 OPTIONS AND ACCESSORIES 6 1 INTRODUCTION 6 2 This section of the manual contains information concerning the options and accessories available for use with your 8050A Digital Multimeter This information is divided into subsecti
34. 005 C Inductance eee ee ee eee 8 3 nH in series w 0 01Q shunt Overload A Pander ee Up to one minute at 20A with a 1 4 duty cycle for E after currents between 10A and 20A Connecis too cee ee cee ees 3 4 inch center banana jacks Connectors sus x e a 5 way binding posts red and black 80K 6 HIGH VOLTAGE PROBE Voltage Range oooocoomoco o 0 to 6 kV de or peak ac input Impedance 0 cee eee 75 MQ nominal Division Ratio o oomoooo o 1000 1 Accuracy DG TOSO HE N RRR Bhasin Xa es 1 SOO HZ TO T KHZ ociosas thaw ce 2 ABOVE T KHA 32 veda pi dees Output reading falls Typically 30 at 10 kHz 80K 40 HIGH VOLTAGE PROBE Voltage Range oooooomomooso 1 kV to 40 kV dc or peak ac 28 kV rms ac input Resistance sss 1000 MQ Division Ratio ooocmomo 1000 1 Accuracy Dc overall 20 kV to 30 kV 2 calibrated at 25 kV UPPER LIMIT us uv neta n Changes linearly from 2 at 30 kV to 4 at 40 kV LOWER LIMIT e ex ras Changes linearly from 2 at 20 kV to 4 at 1 kV Accuracy Ac Overall 5 at 60 Hz 600 6 ACCESSORIES PROBE ACCESSORIES Table 600 1 Probe Accessories Specifications cont 83RF HIGH FREQUENCY PROBE AC to DC Raio 1 1 Ratio Accuracy at 1 MHz and loaded with 10 MN ABOVE TV RE REEL ui ar eae BELOW TN sacras ce be UB Frequency Response Relative to 1 MHz 100
35. 10 As Part A in Figure 3 2 shows the CMOS switches UI8B and U19A are closed providing voltage levels that allow C8 and C33 to store the offset voltages of the buffer integrator and comparator CMOS switches U18D and U19B connect the flying capacitor C7 to a reference voltage Since the V function is selected C7 is charged by the a d converter reference voltage source At the end of the Autozero period C7 is fully charged C8 and C33 are charged up to the offset voltages and the comparator output CM is near a threshold level 3 11 Assume that an input of 1 0000V dc is present at the DMM input first set of waveforms in Figure 3 3 The microcomputer starts the Integrate command INT at the same time that it ends the AZ command The a d converter circuit is switched to the configuration shown in Figure 3 2 Part B CMOS switch U18A connects the output of the signal conditioners to the input terminal of the buffer For the 2V range the microcomputer selects the X1 gain in the buffer and the input from the signal conditioner is applied to the buffer and integrator in series The integrator begins to charge C9 The instant that the charge on C9 shifts from its initial level the comparator toggles and its Compare output CM goes to a steady level Since theunknown inputto the DMM is 3 1 THEORY OF OPERATION CIRCUIT DESCRIPTION negative the buffer goes negative the integrator goes positive and CM will go negative C9 will
36. 100 10 3 WHITE NOISE AC COUPLED x N PULSE TRAIN A or Figure 2 15 Crest Factor 3 0 to 4 0 3 04 b a 1 gt 9 0 SPIKE AC COMPONENT DC LEVEL Figure 2 16 Total RMS Value 2 98 Affects of Offset in AC Measurements 2 99 The 8050A is a true rms responding multimeter and the display will indicate a reading of typically 10 to 20 digits because of amplifier noise when the input is shorted inthe AC V or AC mA functions The accuracy of the 8050A is not affected by this internal offset even when measured inputs are at the specified floor of the multimeter 5 of the range selected When the rms value of the two signals internal offset and 5 of range input is calculated as in the following equation the insignificant effect of the offset is shown Total rms digits Y 202 1000 1000 2 The display of the 8050A will read 1000 digits OPERATION AC VOLTAGE CURRENT MEASUREMENT 2 100 BANDWIDTH LIMITATIONS 2 101 Signals with rectangular waveforms contain component frequencies that are much higher than the fundamental frequency used to describe them The component frequencies for rise times less than microsecond exceed the 200 kHz bandwidth of the 8050A and will produce a low reading display For example a 10 kHz square wave with a rise time of less than I microsecond will produce a display reading that is approximately 1 low and proportionally lower for higher frequency square wav
37. 16 On pages 5 3 and 601 3 Tables 5 1 and 601 2 CHANGE MP25 TEST LEAD W PROBE Y8132 1516666 895361516666 1 TO MP25 TEST LEAD TL70 1642033189536164203311 ERRATA 5 On page 1 4 Table 1 2 for both DC Current and AC Current change the BURDEN VOLTAGE specifications FROM 0 3V max 0 9V max TO 0 3V typical 0 9V typical ERRATA 6 On page 4 2 Table 4 1 add the following to the bottom of the table AC Calibrator AC Voltage 100 mV to 100V John Fluke Model 5200A 20 Hz 1 On page 4 6 add the following information 4 35a Use the following procedure to verify proper operation of the low frequency ac voltage measurement functions 7 85 ee 8050A l Connect the AC Calibrator to the 8050A as follows HI to the V K S input connector and LO to the COMMON input connector 2 For each step in Table 4 4a select the switch positions shown and adjust the AC Calibrator to the required 8050A voltage input level and frequency then verify that the 8050A display is within limits 3 This concludes the low ac linear voltage test If desired proceed directly to the dB Voltage Test Table 4 4a Low Frequency AC Linear Voltage Test UUT INPUT DISPLAY RANCE LEVEL FREQUENCY READING Typically 2 to 4 digits of rattle with be observed On Table 4 4 change the the following in the DISPLAY READING Change step 12 l l l FROM 985 to 1015 TO 0985 to 1015 CHANGE 2 34461 On page 5 3 Table 5 1 CHANGE H2
38. 2 5 687 8695 Mexicana De Electronica Industrial S A Av Porvenir No 8608 Centro C San Martin Local 6 CD Jaurez Chihuahua TEL 52 16 23 02 35 FAX 52 16 23 02 35 Netherlands Fluke Europe B V Test amp Measurement Science Park Eindhoven 5110 P O Box 1186 5602 BD Eindhoven TEL 31 40 644 226 FAX 31 40 644 260 11 93 SERVICE CENTERS cont Fluke Netherland B V Technische Service Prof Act Hurksestraat 2C Gebouw HBH 5652 AJ Eindhoven TEL 31 40 723 220 FAX 31 40 723 337 New Zealand Phillips Customer Support Scientific amp Industrial Private Bag 41904 St Lukes 2 Wagener Place Mt Albert Auckland 3 TEL 64 9 894 4160 FAX 64 9 849 7814 Norway Fluke Norway A S Customer Support P O Box 6054 Etterstad N 0601 Oslo TEL 47 22 653400 FAX 47 22 653407 Peru importaciones amp Representaciones Electronicas S A JR Pumacahua 955 Lima 11 TEL 51 14 23 5099 FAX 51 14 31 0707 Philippines Spark Electronics Corp P O Box 610 Greenhills Metro Manila 1502 TEL 63 2 700 621 FAX 63 2 721 0491 Portugal Phillips Portuguese S A IE Division T amp M Department Rua Dr Antonio Loureiro Borges 5 Arquiparque Miraflores Apartado 300 2795 LINDA A VELHA TEL 351 1 4163 316 FAX 351 1 416 3185 Republic of South Africa South African Phillips Pty Ltd 195 215 Main Road P O Box 58088 Martindale 2092 TEL 27 11 470 5132 FAX 27 11 470 5206 Singapore Fluke
39. 2 9 describes how to operate the 8050A for voltages in decibels When dB is selected the 8050A converts ac or dc voltage readings into the dBm equivalent decibels above or below one milliwatt The reference impedance for decibel measurements is selected DECIBELS dB 1 SELECT FUNCTION from 16 stored reference impedances The 8050A is setup at the factory to turn on with a default reference impedance of 6000 The power up default reference impedance may be changed to any of the 16 stored impedances Refer to Section 4 for information on how to change the default setting 2 SELECT REFERENCE IMPEDANCE AND RANGE a SET REF2 SWITCH m b WHEN CORRECT REFERENCE IMPEDANCE APPEARS IN DISPLAY SELECT THE RANGE 3 CONNECT TEST LEADS Figure 2 9 dB Voltage Operation 2 11 OPERATION INITIAL CHECKOUT PROCEDURE 2 38 INITIAL CHECKOUT PROCEDURE 2 39 The following procedure allows the operator to verify that the 8050A is operating correctly for most functions The only test equipment required isa set of test leads and access to a standard wallsocket This procedure checks for general operation only and is not intended to verify instrument accuracy Performance tests and calibration adjustments are contained in Section 4 of this manual for the purpose of testing instrument accuracy 2 40 Use the following procedure to verify that most of the functions of the 8050A are operating correctly 1 Select the AC V
40. 26X0015KA1 1 C20 CAP ELECT 2 2 UF 20 50V 614875 89534 614875 1 C21 CAP ELECT 220 UF 10 475 164 435990 89536 435 2 C22 CAP ELECT 470 UF 10 75 16V 501510 89536 501510 1 C23 CAP ELECT 2200 UF 10 475 16V 4 4981 89535 474981 1 C25 CAP CER 1000 PF 20 100V 149153 56289 CO238101F1038 3 C26 CAP CER 1000 PF 20 1004 149153 56289 CO238101F1038 REF C27 CAR TA 2 2 UF 20 20V 161927 56289 1960226X0020HAl i C28 CAP POLYPROP 047 UF 10 1004 444773 89536 446773 i C29 CAP MICA 180 PF 5X 5004 148450 72136 DMISFIS1J 1 C30 CAP MICA 68 PF 5 500V 148510 72126 DHISF680J 1 C31 CAP MYLAR 047 UF 10 2509 162008 73445 CRE 7 A47 REF C32 CAP CERAMIC 1000 PF 10 5004 357806 56289 CO16R102G 102K 3 C33 CAP Th 10 UF 20 193523 54289 196D106x0015a1 REF C34 CAP ELECT 47 UE 10 079 16V 436006 89526 426006 1 C35 CAP CERAMIC 1000 DF 10 500 357806 56289 COl6B102G 102K REF C34 CAP CERAMIC 1000 PF 10 500U 357806 56289 COI4B102G 102K REF C37 CAP CER 025 UF 20 1004 168435 56289 C0238101H253 1 C39 CAP ELECT 47 UF 20 10Y 613984 89534 613784 2 C39 CAP ELECT 47 UF 20 104 613984 89535 613984 REF C40 CAP MICA 330 PF 3 3004 148445 72136 DHi5F331J 1 C41 CAP ELECT 10 UF 202 16V 614859 89535 614859 2 C42 CAP TA 10 UF 20 15V 193623 54289 1960106X0015A1 REF cag CAP CER 1000 PF 20 1004 149153 54289 C0238101F103H REF 044 CAP ELECT 10 UF 20 16V 614859 895
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42. 2A to 10A 300V ac rms maximum kV rms 7 16 inch 1 11 cm 01 Option Rechargeable Battery Option 601 1 INTRODUCTION 601 2 The Option 8050A 01 replaces the standard 8050A power supply with a power supply that will operate from either rechargeable batteries or line power If the L a geral trees MIE A ed de qag mn mm batteries are fully cnarg your SUSUA Will operate for 10 hours typical before the batteries must be recharged 601 3 SPECIFICATIONS 601 4 The specifications for the 8050A 01 are given in Table 601 1 All other specifications are equivalent to those given for the 8050A in Section 1 of this manual 601 5 OPERATION WARNING DO NOT OPERATE YOUR 8050A 01 WITH THE BATTERIES REMOVED 601 6 Operation of an 8050A 01 differs in two respects from operation of a standard 8050A battery charging and the BT annunciator on the display When the BT annunciator appears on the display during operation measurement accuracy may deteriorate beyond the limits specified in Section 1 If the BT annunciator appears and you stili need to make additional measurements before recharging set the POWER switch to the OFF position for a couple of minutes then set the POWER switch back to the ON position If the BT annunciator does not appear immediately you have at least two minutes of in specification operation If the BT annunciator appears immediately after the POWER switch is set back to the ON position no
43. 3 89535 343723 H Thi INSTRUCTION MANUAL 80504 230907 89536 330907 i RECOMMENDED SPARE PARTS KIT 80504 333919 89536 333919 AR LIST OF REPLACEABLE PARTS MP14 CAUTION SUBJECT TO DAMAGE BY STATIC ELECTRICITY MP13 2 8050A 0 amp 3 Figure 5 1 80504 Final Assembly LIST OF REPLACEABLE PARTS MP2 aot H4 2 BEZEL SECTION MP3 MP6 MP14 MP21 MP4 FRONT VIEW H1 MP18 p it 2 MP20 MP11 MP19 SIDE VIEW CAUTION SUBJECT TO DAMAGE BY STATIC ELECTRICITY 8050A 4001 Figure 5 1 8050A Final Assembly cont 5 5 LIST OF REPLACEABLE PARTS CO SUBJECT TO DAMAGE BY Bezel Section STATIC ELECTRICITY At DISPLAY BOARD 5 6 Figure 5 1 8050A Final Assembly cont LIST OF REPLACEABLE PARTS Table 5 2 Ai Main PCB Assembly DESCRIPTION MFG PART NO MAIN PCE ASSEMBLY LINE MODEL FIGURE 3 2 80506 4001 A1 VAR 1 5 0 25 BF 2000V 530 000 2 VAR 1 5 0 25 PF 20008 530 000 REF C3 CAP MICA 120 PF 3 3004 148486 72136 Dn15F121J 2 C4 CAP MICA 120 PF 5 500U 148486 72136 Dnh15F121J REF cS CAP MICA 1800 PF 5z XW 148333 87336 148353 i C CAP POLYPROP 10 UF 10 1004 445781 89536 444781 i C7 CAP PDLYEST 1 0 UF 10 100V 447847 37445 C280n H in i C8 CAP TA 10 UF 20 15V 193623 256289 1960106Xx0015481 4 C9 CAP POLYPROP 22 UF 10 1004 446799 89536 446799 i C10 CAP POLYESTER 022 UF 10 1000U 448183 252763 MKT 1822 322 10 i Cii CAP MYLAR 047 UF
44. 36 614859 REF CL1 DIODE FED CURRENT REGULATOR 393454 07910 TCR5290 1 i ERI DIODE SI RECTIFIER 2 AMP 50 VOLT 347559 14099 1N5400 i 1 CR2 DIODE SI LO CAP LO LEAK 348177 07263 FD7223 3 1 CR3 DIODE SI LO CAP LO LEAK 348177 07263 FD7223 REF CRA DIODE RECTIFIER 343491 01295 1N4002 i 4 CRS CR amp DIODE SI HI SPEED SWITCHING 203323 07910 1N4448 2 1 CR12 DIODE SI LO CAP LO LEAK 348177 07263 F07223 REF DSI DIODE LIGHT EMITTING LED RED 429555 12040 MLSSO53 i 4d pi SPRING COMPRESSION COIL 422824 83553 0240 026 0500 8 1 2 SUPPORT HYBRID TO U32 515635 89526 515635 2 p3 CLIP FUSE 485219 91833 3527 2 HP 4 HOUSING LED M DS1 522243 89535 322243 1 ps HEATSINK H U26 473785 89536 473785 i P SUPPORT RESISTOR 345079 89534 345077 1 Mp7 CLIP COMPONENT 516880 89535 316880 2 MPs SPACER SUAGED 525154 89536 525154 4 no SPACER STAMDOFF 295089 89535 285089 2 31 JUMPER ASSY FOR US 417899 32072 CA 0535 TSD 1 np32 AMBER ASSY FOR U33 417311 30035 9 109 1 04 1 01 XSTR SI NPN 218394 89536 218396 3 Q2 XSTR SI NPN 218396 89535 218396 REF XSTR SI NPN METAL 329698 1 XSTR SI PNP 2N4250 2 OPTIONS RECHARGEABLE BATTERY 01 OPTION Table 601 3 A1 Main PCB Assembly cont RES DESCRIPTION DUAL H CHANNEL 100K 10 14 Wid 1000 10 2M MTL FILA 1000 t 5x CER 100K 10 1 28 VAR 100 10 1 24 VAR CER IK 10 1 24 COMP 220K 10 24 VAR CER 300 10 1 2M CERMET 200 10 1 24 Pit
45. 4 This completes the AC Calibration procedure Remove power from the DMM Calibrator before dismantling the test setup 4 48 Jumper Selection 4 49 If the calibration adjustments do not bring the instrument within specifications or if certain critical components VR 1 or U32 have been replaced complete one of the following jumper selection procedures Jumper locations are shown in Figure 4 2 4 50 U5 JUMPER SELECTION 4 51 The US jumper selection procedure should be performed if VR1 has been replaced or if R11 does not have a sufficient adjustment range Use the following procedure to select the proper resistance for US 1 Using the 5 pin connector p n 537514 provided with the replacement parts kit short MP20 jumper positions A B C D 2 On the 8050A set the POWER switch to ON 3 Adjust R11 fully counterclockwise 4 Select DC V function 2V range 5 Connect the DMM Calibrator to the 8050A as follows HI to the V kQ S input connector and LO to the COMMON input connector 6 Adjust the DMM Calibrator to 1 8888V dc MAINTENANCE CALIBRATION ADJUSTMENTS JOHN FLUKE MFG CO INC COPYRIGHT 1984 C2 ci en Y AS RS 190VAC 19VAC O Z 1000VDC 190VDC 10 KHZ 19 KHZ Do e o o EE 06 8 BREE B o o o d Oo 6 o ONXO 5 A G I R12 OF o o0 O0 Q o o9 000 00 0 o9 0 0 00 60 9 o 0 o 090 06 06 0 00 60 oq O E o o G 0 bi S Q o oo no mo u o o0 00 O0 2 G 0 6 00 20 0 0 6 00 00 O0 0 60 00 00 O ua i o 00 0
46. 40 MWESISAN 1 i U23 IC OPERATIONAL APP 80506 45040 609883 89536 609883 REF U26 VOLTAGE REGULATOR 473773 89536 473793 i i U27 RESISTOR NETWORK 313598 89934 313598 i i U28 RECTIFIER BRIDGE 418582 823003 VOB 2 1 U30 RECTIFIER BRIDGE 4180582 83003 VOS REF U31 IC LOW POWER DUAL VOLTAGE COMPARATOR 478354 01295 LMIYIN REF 132 HYBRID RAS TO DC CONVERTER 310685 89536 510685 i U33 RESISTOR NETWORK 313564 89336 313564 i i u34 RESISTOR NETWORK 519728 87536 519728 i i VRI DIODE ZENER 30 217 89536 387217 i i UR2 UR3 DIODE ZENER SHA 3 64 SZ SELECTI 235229 89534 325339 2 i Wi WIRE ASSEMBLY RED 537159 89536 597159 1 Wo WIRE ASSEMBLY BLK 537167 89534 3537167 i u3 WIRE ASSEMBLY HT 489096 89536 489076 1 Na WIRE ASSEMBLY BLK 489104 89336 487104 i ws WIRE ASSEMBLY WHT 459120 89534 439120 i W6 WIRE ASSEMBLY CRW YEL 489112 89536 489112 i XU17 SOCKET IC 429282 09722 DILB4OP 108 i XU18 20 SOCKET 14 PIN 276527 09922 DILBSP 108 3 Yi CRYSTAL 4 MHZ 474072 89536 474072 i i1 Please be aware of voltage changes 2 Certain components amp ay not be used therefore may not be installed d Ul P N 310941 may be used in place of P M 501090 U2 P N 510834 MN be used in place of P N 512905 601 9 RECHARGEABLE BATTERY 01 OPTION OPTIONS FACTORY SELECTED PARTS mar NOT BE INSTALLED 220 i g isy y Loy yl o ug sn g rs TES TSR TF TSS T d lt S D e d 8050A 01 2 A1 Main P
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48. 6 READING AC DC RANGE LEVEL FREQUENCY 190 mV dc 189 92 to 190 08 190 mV dc 189 92 to 190 08 ne 1 9V dc 1 8992 to 1 9008 1 9V de 1 8992 to 1 9008 19V dc 18 992 to 19 008 190V dc 189 92 to 190 08 1000V dc 999 5 to 1000 5 188 95 to 191 05 200 mV 190 mV ac rms 188 95 to 191 05 100 mV ac rms 180 20 to 199 80 0985 to 4915 1 8895 to 1 9105 1 8895 to 1 9105 1 8020 to 1 9980 18 895 to 19 105 10 kHz 18 895 to 19 105 50 kHz 18 020 to 19 980 E ac rms a x Hz 188 95 to 191 05 E ac rms a x kHz 99 40 to 100 60 100 Hz 745 2 to 754 8 1 kHz 745 2 to 754 8 1 9V ac rms 100 Hz 19V ac rms 750V ac rms MAINTENANCE LINEAR VOLTAGE TEST Table 4 5 dB Voltage Test Short Circuit 10 00 mV ac rms 10 00 mV ac rms 1 0000V ac rms 200 mV dB 5 Disconnect the DMM Calibrator from the 8050A 6 Onthe 8050A set the POWER switch to OFF 7 Setthe REF Z switch to ON in 8 On the 8050A set the POWER switch to ON and verify that the display reads 600 the default reference impedance for 3 seconds then sequences through all stored reference values at a I second rate Stored reference impedances are 50 75 93 110 125 135 150 250 300 500 600 800 900 1000 1200 and 8 000 NOTE If the default reference impedance of Step 8 is not 600 refer to the dB Reference Impedance Power Up Setting procedure and check if the
49. 6 01 MAIN PCR ASSEMBLY 1 BT1 BT2 BATTERY WIRED SET A87975 89536 287975 2 Fi FUSE FAST ACT 2A 274582 71400 ACK 2 1 5 FOR EUROPEAN USAGE USE P N 450972 89536 460972 F2 FUSE FIBRE 3A amp 00U 475004 71400 BRS 3 i 5 F3 FUSE SLO BLO 1 144 163030 71400 MDLi 16 i 5 FOR EUROPEAN USAGE USE 1 326 SX20M 2400 REPLACE FUSE CLIPS WITH FUSE RELOCATE WHITE WIRE IN 2404 HOLE Hi SCREM PHP 6 32 X 1 4 385401 73734 19042 3 H2 SCREW PHP 6 32 X 1 2 320051 87336 320051 2 H3 SCREW RHP 4 40 X 1 4 256156 89536 256156 2 H4 SCREW THD F RHING 5 20 X 5 16 494541 89536 494641 4 HS SCREW SEMS 6 32 X 1 4 178533 89536 178533 3 HS SCREW PHP 6 32 X 3 8 288266 9536 289266 2 HZ WASHER 6 FLAT 340505 89536 340505 a Ji CABLE DISPLAY INTERCONNECT 207723 89534 207723 i LCDI DISPLAY LIQUID CRYSTAL 507673 89536 307673 1 1 nei BEZEL LCD 479642 89536 4779642 i HPZ BRACKET LCD 471730 897536 471730 1 MPS UTTOM SWITCH FUNCTION 425900 87336 425700 4 npa BUTTON SWITCH GREEN 510271 87536 310271 i MPS BUTTOM GRAY OFFSET 210164 895346 2510164 H PPS BUTTON SWITCH RANGED 426739 89536 426759 MP7 DECAL CSA 525527 89536 323327 i PS CONNECTOR ELASTOPERIC 453092 87336 1 noe FUSE HOLDER ASSEMBLY 516039 89536 5316039 i TG ORDER FUSE HOLDER CAP ONLY SEE Miz FOR EUROPEAN USAGE USE P N 23 076 897536 337076 FRIO INSERT SILICONE 325139 87536 325139 2 Pil INSULATOR 475044 89336 475044 i Piz CAP FUSEHOLDER i FOR SEPARATE ORDER TO ORDER COMPLETE ASSEMBLY SE
50. A VERA pede cone di 2 14 2 12 Transistor Beta Test Fixture osos Sennen EpERSAN NU OK Ewa Yee Soe vem bans 2 15 2 13 dB Circuit Gain or Loss Measurements isses ns 2 17 2 14 Waveform Comparisons e e nas da a 2 18 2 15 Crest L 26 dus O dau es Tek ode eee ep een Ea 2 19 2 16 Total RMS Valte HR 2 19 2 17 Measuring Amplifier Bandwidth 2 ds 2 20 3 1 8050A Functional Block Diagram A ia 3 3 3 2 APD CONVENED eec mbt wor a yaaa EN 3 4 3 3 AJD Converter Waveforms uates Ere E dad 3 5 3 4 Microcomputer Simplified Block Diagram es ees 3 6 3 5 Signal Conditioning uo eo Pe ee Ve e ees eda dex adt aoi tl e 3 7 3 6 RMS CORPSE KEL TR cess dT ber NAE RIA d a D e R 3 9 4 1 Display POR Access a2 ox ob pice ETA cia TER eth ae a Ds Raa aT qu S dol 4 3 4 2 Calibration Adjustment Locations sr ac ihnen 4 9 8050A Digital Multimeter vi Section 1 Introduction and Specifications 1 1 INTRODUCTION 1 2 Your John Fluke Model 8050A isa portable bench type digital multimeter DMM with a 4 1 2 digit liquid crystal display LCD The 8050A has all the following industry standard features e Voltage measurements from 10 uV to 1000V dc and 10 mV to 750V true rms ac e Current measurements from 10 nA to 2A dc and 10 uA to 2A true rms ac e Resistance measurements from 10 mO to 20MM The 8050A also has several special measurement features These special features incl
51. ANGES mA and COMMON Double fuse protected 2A 250V fuse in series with a 3A 600V fuse V KQ S and COMMON k 2or S ALL RANGES 500V dc or ac rms VOLTAGE LINEAR V 1 SELECT RANGE 2 SELECT FUNCTION 1 DOR 7 251 2898 200 SEED mA Ja ROTO en RELATIVE POWER wf Ue BODA IIGITAL AMULM IMETER 3 CONNECT TEST LEADS Figure 2 3 AC DC Voltage Operation OPERATION AC DC VOLTAGE CURRENT mA 1 SELECT RANGE 2 SELECT FUNCTION L a 2 OOS ne 7 RELATIVE f LOWER 23 s OFF L E OFF E 3 CONNECT TEST LEADS 4 BREAKCIRCUIT 5 PLACE 8050A m SERIES Figure 2 4 AC DC Current Operation OPERATION RELATIVE Fa panera 2 26 Resistance N 2 27 Figure 2 5 describes how to operate the 8050A for resistance measurements When KO is selected erroneous measurements can occur if power is present in the resistance being measured Ensure that power is removed before measuring in circuit resistances The AC DC function switch has no effect during resistance measurements 2 28 Conductance S 1 Q 2 29 Figure 2 6 describes how to operate the 8050A for conductance measurements When S 1 is selected two ranges of measurements are available 2 mS and 200 nS To select either range press both range switches above the grey shaded area simultaneously 2 30 Diode Test 2 31 Figure 2 7 describes how to operate the 8050A for diode tests
52. ASUREMENT and then drop again to 3 00 dB Note the frequency of the signal generator This will be the lower frequency limit of the bandwidth 2 104 Asimilar technique can be used to determine the frequency response of other ac circuits such as high pass or low pass filters notch filters etc SIGNAL GENERATOR AMPLIFIER dB Rei Ref Level 0 dB 2 105 FINDING THE Q OF A SINGLE TUNED CIRCUIT 2 106 Use the following equation and the application technique for measuring the bandwidth of a circuit to find the Q of a single tuned circuit Resonant Frequency Q 2x Bandwidth Bandwidth BW Figure 2 17 Measuring Amplifier Bandwidth 2 20 3 1 INTRODUCTION 3 2 The theory of operation of the 8050A is discussed on two levels First the Functional Description discusses the operation of the DMM in terms of the functional T innah th ir DlirDiIni qQ Canmard tha fungsie relationships of the major CICUS Secondo inc Circuit Description presents a more detailed discussion of the major circuits Both levels are illustrated by block diagrams and simplified schematics in this section and the schematic diagrams in Section 7 3 3 FUNCTIONAL DESCRIPTION 3 4 The major circuits of the 8050A are shown in the functional block diagram in Figure 3 1 The range and function switches route the unknown input signal through the signal conditioners The signal conditioners develop a dc voltage at the input to thea d
53. C Butler Gals uoce co a wont C PO era rr 3 8 4 1 A A E Soh oe dren EAST ae 4 2 4 2 dB Impedance Selection sense e 4 4 4 3 Display Test eC ELTERN PN 4 5 4 4 Linear Volt ge Test amp tuexcas ssa is cede 4 6 4 5 on ox cr 4 7 4 6 Current Test 2 40 53 S R eda dot decla epi au AA Walesa H 4 7 4 7 Resistance and Conductance Tests ccccsvccccssccccevecsceas 4 8 4 8 b e n n cT 4 10 4 9 AC Calibration A A a a l 4 10 4 10 Us per Positions sirar id ak cR ee uso nee ta om Dak hey dads 4 11 4 11 U33 TUI per Positions v ex cena v Cetera od E ee eee Chan dev tard 4 12 4 12 ESTALOLMES XEM 4 13 4 13 Troubleshooting Guide iiif iv List of Figures FIGURE TITLE PAGE Frontispiece 8050A Digital Multimeter wen ds Cot rex Da Pe vi 1 1 8050 A MIBENSION SS N E ON 1 6 2 1 Controls Indicators and Connectors eee ees 2 2 2 2 Liquid Crystal Display ae y 3 er ee pa Pace Spe A EORR a 2 4 2 3 AC DC Voltage Operation A Se ba e eee tees ad es 2 5 2 4 AC DC Current Operation ases odo vieset vt xad EDU EINER IL X VEM 2 6 2 5 Resistance Operation venero Fea er Ea eu hrs 2 7 2 6 Conductance Operation nia 2 8 2 7 Diode Test Operation ar A VS S ER Kes 2 9 2 8 Relative Operation ahaa eR RE EAN 2 10 2 9 dB Voltage OBS PIDE lA owed ka ua LL Eee 2 11 2 10 Circuit Loading Error aono wets iu sica Wale bunt da anita Sie 2 13 2 11 Calculating Burden Voltage Error sa
54. CB Assembly Figure 601 601 10 OPTIONS RECHARGEABLE BATTERY 01 OPTION 8050A 1611 Figure 601 2 A1 Main PCB Assembly 8050A 01 cont 601 11 601 12 Section 7 schematic Diagrams TABLE OF CONTENTS FIGURE TITLE PAGE 7 1 Mnemonics LoS E a AA A O A ER 7 2 7 2 Al Main PCB Assembly Line Supply reinicias Eh e E ER n 7 3 7 3 Al Main PCB Assembly Schematic 1 0 e ccc ccc eee cen eee r serene 7 4 7 6 7 4 Al Main PCB Assembly Battery Option 0d ccc eee cee cee eee SCHEMATIC DIAGRAMS MNEMONICS AC X 1 AC buffer gain of 1 command AC X 100 AC Buffer gain of 100 command AZ Auto Zero BP Back plane drive signal 50 Hz square wave BT Low Battery indicates that the rechargeable batteries in the 01 Option need recharging dB Decibels De integrate plus reference used with a negative input DE R De integrate minus reference used with a positive input DP Decimal Point EXT INT External Interrupt stops the counter in the microcomputer Fa Fb ES Function inputs to microcomputer HOLD A 52 usec maximum period immediately following INT HV High Voltage comes on when the instrument measures 40V or greater INT Integrate LCD Liquid Crystal Display LO Defines front panel selection of a function range requiring an A D gain of 10 OL A 5 msec period at the beginning of auto zero when an overrange is detected P O R P
55. Corporation Singapore Representative Office 827 03 PSA Building 460 Alexandra Road Singapore 0511 TEL 65 276 5161 FAX 65 276 5759 Spain Fluke Ib rica S L Depto Tecnico Instrumentacion Martinez Villergas 2 28027 Madrid TEL 34 1 326 7512 FAX 34 1 326 0668 Sweden Fluke Sweden AB T amp M Customer Support Kronborgsgrand 11 P O Box 61 S 164 94 TEL 46 8 751 0230 FAX 46 8 751 0480 Switzerland Fluke Switzerland AG T amp M Customer Support Riedstrasse 12 Postfach 360 CH 8953 Dietikon 1 TEL 41 1 745 2244 FAX 41 1 745 2240 Taiwan Schmidt Electronics Corp 5th Floor Cathay Min Sheng Commercial Building No 180 Sec 2 344 Min Sheng East Road Taipei TEL 886 2 501 3468 FAX 886 2 502 9692 Thailand Measuretronix Ltd 2102 31 Ramkamhang Road Bangkok 10240 TEL 66 2 375 2733 375 2734 FAX 66 2 374 9965 Turkey Turk Phillips Ticaret A S Inonu Caddesi 78 80 Posta Kutusu 504 Beyoglu instanbul TEL 90 1 143 5891 United Kingdom Fiuke U K LTD Customer Support Colonial Way Watford Hertfordshire WD2 4TT TEL 44 923 2405 14 FAX 44 923 225067 Uruguay Coasin Uruguaya S A Casilla de Correo 1400 Libertad 2529 Montevideo TEL 598 2 789 015 FAX 598 2 797 338 Venezuela Coasin C A Calle 9 Con Calle 4 Edif Edinurbi Apartado de Correos NR 70 136 Los Ruices Caracas 1070 A TEL 58 2 241 0309 241 1248 FAX 58 2 241 1939 OPTION MODEL NUNBE Y3205 C 86 M00 2
56. E MP9 P Ha O 12 DECAL DISC ON HANDLED 4 8248 89536 478248 2 MP 1 9 PANEL FRONT 310154 89535 310136 i mis RECEPTACLE AC 471027 89536 471029 i MP1s RETAINER FLEX 510198 89534 310198 2 Pi SHIELD INSULATOR 316021 87336 316021 i moig SHIELD MAIN 310172 87534 310172 i npi9 SHIELD TOP 310180 8733 510180 1 MP 20 INSULATOR 523194 89536 325196 i MP2i DECAL FRONT PANEL 208455 89336 508465 i nP22 CASE EXTERIOR PLASTIC 478008 87336 4 8008 i nP23 HANDLE MOLDED 330092 89535 330092 i ne24 DECAL SPECIFICATION 507663 89936 507665 i IP23 TEST LEAD W PROBE Y8132 216666 89536 516666 i npa26 LABEL Caution 334407 B9536 334427 i MP27 PAD BATTERY ABSORBANT 423610 87336 433610 z 2 rip28 RETAINER BATTERY 471032 895356 4 1052 2 np27 GROMMET USED IN SHIPMENT 201593 87336 501373 i HP30 DECAL FACTORY MUTUAL 224611 89536 324611 i 1931 ARPER ASSY FOR US 33514 89536 537514 i i rP32 ARPER ASSY FOR U33 53 522 9536 53 2522 3 i HD32 BOX UNIT SHIPMENT 697821 9536 697821 i np34 BOX LINER 723155 89536 723133 i Wi LINE CORD 343723 9536 343723 i mi INSTRUCTION MANUAL 80304 230907 89535 339907 1 RECINTENDED SPARE PARTS KIT 80304 533719 89335 333917 AR 601 3 OPTIONS RECHARGEABLE BATTERY 01 OPTION MP13 MP7 Ge CAUTION BY 8050A 01 STATIC ELECTRICITY Figure 601 1 8050A 01 Final Assembly 601 4 OPTIONS RECHARGEABLE BATTERY 01 OPTION Bezel Section FRONT VIEW S MP18 MP12 MP11 MP 19 MP28 SIDE VIEW 8050A 401 1 Fig
57. MENT 2 A shorted transistor will produce an overrange indication on the display 2 76 Transistor Leakage Test 2 77 Use the following procedure to test transistors for leakage Ices 1 Install the transistor and connect the test fixture to the 8050A see preceding paragraphs 2 Set the switch on the test fixture to ICES 3 Select the conductance function 2 mS range on the 8050A 4 A reading of more than 0 0020 6 yA indicates a faulty transistor silicon 2 78 Transistor Beta Test 2 79 Use the following procedure to test the beta of a transistor 1 Install the transistor and connect the test fixture to the 8050A see preceding paragraphs 2 Set the switch in the test fixture to BETA 3 Select the conductance function 2 mS range on the 8050A 4 Note the display reading on the 8050A then shift the decimal point three places to the right This will be the beta of the transistor NOTE Beta is a temperature sensitive measurement Allow sufficient time for each tested transistor to stabilize Avoid touching the transistor case with your fingers while making beta measurements 2 80 Relative Measurement 2 81 The following paragraphs contain additional information on and measurement techniques for relative measurements 2 82 DECIBEL dB CIRCUIT GAIN OR LOSS 2 83 The relative function of the 8050A makes it easy to determine the gain or loss in decibels of a circuit By using the
58. NKNOWN INPUTS FUNCTION SWITCHES JT OVERRANGE on 07 0 OL REFERENCE VOLTAGE M Ya 5 A l BUFFER P ab NTEGRATOR ISCOMPARATOR a U20D U20C pese M pum a R v DE R DE R e EU oe ne DE R DER p i c n U20A U208 E m Jl NEGATIVE INPUTS Figure 3 2 A D Converter 3 4 THEORY OF OPERATION CIRCUIT DESCRIPTION MICROCOMPUTER ACCUMULATED 100 mSEC COUNT ee r OOOO 00000 00000 N x ed S cage tab sace E uos Du 191999 CHARGE ON C9 NEGATIVE RANGE INPUT POSITIVE i FULL RANGE INPUT POSITIVE OVER LOAD EXTENDED AUTOZERO Figure 3 3 A D Converter Waveforms 3 5 THEORY OF OPERATION SIGNAL CONDITIONING A D CONVERTER COUNTER INTERRUPT LOGIC CONTROL LOGIC FUNCTION SWITCHES DISPLAY SUBTRACTOR RELATIVE REFERENCES Figure 3 4 Microcomputer Simplified Block Diagram 3 20 Signal Conditioning 3 21 Some 8050A inputs must be scaled and or conditioned before being presented to the a d converter For example high voltage levels must be attenuated and ac inputs must be attenuated and converted into the equivalent dc voltage levels The a d converter has two ranges 200 mV full scale and 2V full scale The following paragraphs describe the signal conditioning circuits 3 22 VOLTAGE SIGNAL CONDITIONING 3 23 As Part A of Figure 3 5 shows the voltage signal conditioning
59. QUID CRYSTAL 307673 89534 307673 i i MP2 BEZEL LCD 479642 89536 479642 1 np2 BRACKET LCD 471730 89536 471730 1 PD 2 BUTTON SWITCH FUNCTION 425900 89336 423700 4 HP4 BUTTON SWITCH GREEN 310271 89536 510271 1 NPS BUTTON GRAY OFFSET 310164 89536 510164 i MPS BUTTON SWITCH RANGE 426739 89336 426759 6 MP7 DECAL CSA 2222927 89536 325527 i MP8 CONNECTOR ELASTOMERIC 253092 89536 453072 i np FUSE HOLDER ASSEMBLY 316039 89336 516039 i TO ORDER FUSE CAD ONLY SEE mp12 D 10 INSERT SILICONE 525139 89336 323139 2 MPil INSULATOR 495044 89336 493044 i MPi2 CAP FUSE FOR SEPARATE ORDER 307699 895 307699 i HD 12 DECAL DISC ON HANDLE 478248 89534 478248 2 MP14 PANEL FRONT 310156 89336 310156 i HD15 RECEPTACLE AC 471029 89536 471029 i HD15 RETAINER FLEX 210198 89534 510198 2 MP 17 SHIELD INSULATOR 316021 87336 516021 1 PD 18 SHIELD MAIN 310172 89536 3510172 1 MP1 SHIELD TOP 310180 89596 310180 i MP2O INSULATOR PCR 222196 89536 525196 i mp21 DECAL FRONT PANEL 507857 89536 507657 i MP 22 CASE EXTERIOR PLASTIC 478008 89534 478008 i np23 HANDLE MOLDED PLASTIC 330092 89336 330092 x np24 DECAL SPECIFICATION 307665 89536 5074645 i np25 TEST LEAD W PROBE YB132 316666 897534 314666 1 P30 DECAL FACTORY MUTUAL 324611 89534 324611 1 HD31 JUMPER ASSY FOR US 3437314 89536 337514 1 i P32 JUMPER ASSY FOR U33 337322 89536 337522 i i nP33 BOX UNIT SHIPMENT 677821 89334 697821 i NP34 BOX LINER 723155 89336 723155 i Wi LINE CORD 34372
60. R SELECTION 4 53 The U33 jumper selection procedure should be performed if the RMS Converter U32 has been replaced or if R7 does not have a sufficient adjustment range Use the following procedure to select the proper resistance for U33 1 Using the 4 pin connecter p n 537522 provided with the replacement parts kit short MP2 jumper positions E F G 4 10 Repeat until both are within their limits Use an insulated screwdriver for these adjustments If R7 cannot be adjusted to the DISPLAY LIMITS refer to the U33 jumper selecter Less than 40 digits a GS 18 990 to 19 010 EN 99 95 to 100 05 On the 8050A set the POWER switch to ON Adjust R7 fully clockwise and adjust R29 the center of its range Select the AC V function 2V range Connect the DMM Calibrator to the 8050A as follows HI to the V kQ S input connector and LO to the COMMON input connector Adjust the DMM Calibrator for 1 0000V ac rms at 200Hz Turn on the DMM Calibrator Compare the 8050A display to the DISPLAY READING columns in Table 4 11 and find which LOW and HIGH values that the 8050A display reading is between Cut out the portion of the jumper as shown under the JUMPER CONFIGURATION heading that corresponds to the DISPLAY READING MAINTENANCE CALIBRATION ADJUSTMENTS Table 4 10 U5 Jumper Positions DISPLAY ALL JUMPER PINS INSTALLED JUMPER CONFIGURATION AS VIEWED FROM REAR OF 8050A LOW HIGH I i
61. STRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO 4 1 INTRODUCTION 4 2 This section of the manual contains maintenance information for the 8050A This includes access procedures disassembly and replacement procedures performance tests calibration adjustments and troubleshooting procedures The performance tests are recommended as an acceptance test when the instrument is first received The performance tests can also be used as part of a routine preventive maintenance schedule 4 3 A one year calibration cycle is recommended to maintain specifications given in Section 1 of this manual The test equipment required for the performance tests or calibration adjustments is listed in Table 4 1 Test equipment with equivalent specifications may be substituted for the recommended model 4 4 SERVICE INFORMATION 4 5 The 8050A is warranted for a period of one year upon shipment to the original purchaser Conditions of the warranty are given at the front of this manual Malfunctions that occur within the limitation of the warranty will be corrected at no cost to the purchaser For in warranty repair call toll free 800 426 0361 for the address of the nearest Fluke Technical Service Center In Alaska Hawaii Washington or Canada call 206 356 5400 toll call Ship the instrument postpaid in the original container If the original container is not available pack the instrument in a sturdy carton with at least three inches of non settling p
62. Sixteen user selectable impedance reference levels are provided to reference a 0 dBm 1 mW level 50Q 750 930 1100 1250 1350 1500 2500 3000 5000 6000 8000 9000 10000 120002 and an 80 impedance reference level is provided to reference a0 dBW level NOTE On request the NOT SPECIFIED portion of the 100V 750V Range can be extended to the Volt Hertz product of 107 dB Ranges INPUT dBm ACCURACY from 596 of range to full scale 1 year VOLTAGE 600 REF RANGE 20Hz 45 Hz kHz 10kHz 20 kHz 50 kHz 0 77 mV 2mV 60 to 52 0 5 dBm 2mV 2V 52 to 8 i 0 1V 2V 18 to 8 1V 20V 2 to 28 0 15 dBm 10 75 dBm 10V 200V 22 to 48 l 100V 750V 42 to 60 When 200 mV range is selected the 8050A autoranges for best accuracy for 2V inputs and less INTRODUCTION SPECIFICATIONS Table 1 2 8050A Specifications cont DC Current RANGE RESOLUTION 200 uA 0 01 yA 0 3V max 200 mA 10 uA OVERLOAD PROTECTION ac dc 2A 250V fuse in series with 3A 600V fuse for high energy sources ACCU RACY for 1 Year BURDEN VOLTAGE 0 3 of reading 2 digits AC Current True RMS Responding AC Coupled INPUT er BURDEN CURRENT RESOLUTION RANGE 20 Hz 45 Hz 2kHz 10kHz 20 kHz VOLTAGE 100 mA 2000 mA 2000 mA 10 uA 200 yA 200 uA 100 uA 2 mA 2mA 1 mA 20 mA 20 mA 2 10 7 2 10 O 3V rms max 10 mA 200 mA 200 mA Typically 3 to 5 digits of rattle will be observed at full s
63. TING TECHNIQUES 2 21 Thefollowing paragraphs describe how to operate the 8050A in each of its seven primary measurement functions Refer to the Applications paragraphs for additional measurement techniques respond when measuring current check the fuse refer to the fuse replacement procedure in this section lf measuring an unknown current set the DMM on the highest range then if needed select a lower range 2 3 OPERATION LCD DISPLAY 8050A 01 ONLY LOW BATTERY INDICATOR o tt POLARITY SIGN DISABLED DURING Vac MA AND kQ FUNCTIONS NOTE 8050A OVERRANGE INDICATION NOTE 8050A IMPROPER SWITCH SETTING N dB FHV i eve pel oel ees REE 8050A DISPLAY ANNUNCIATORS DECIBEL FUNCTION IN USE HIGH VOLTAGE gt 40 Vdc or ac rms BEING MEASURED RELATIVE FUNCTION IN USE Position of decimal point dependent on range selected This display will appear if the switches of the 8050A are set in an improper configuration e g DC V 20 MQ Figure 2 2 Liquid Crystal Display 2 4 OPERATION AC DC VOLTAGE Table 2 2 Maximum input Signal Limits INPUT TERMINALS MAXIMUM INPUT OVERLOAD 1000V dc or peak ac FUNCTION RANGE SELECTED SELECTED LPS ALL RANGES V KkQ S 20V 200V 750V and 750V rms continous or 107 V Hz s COMMON 750V rms for no longer than 15 seconds or 107 V Hz 2V 200 mV ALL R
64. TRUE RMS CONVERTER 3 37 An rms amplitude is the value of alternating voltage that results in the same power dissipation in a given resistance as a dc voltage of the same numerical 3 8 value The mathematical formula for computing the rms value of a dc voltage is V rms y Viz where Vi is the instantaneous voltage at any given point in time and VP is the average of VE The rms converter in your 8050A monitors the instantaneous voltage and computes the rms value of the input signal Figure 3 6 shows the mathematical derivation of the implicit rms conversion circuit in your 8050A and a block diagram of that circuit 3 38 Touch Hold Circuit 3 39 The touch hold circuit operates in conjunction with the 80T H Touch Hold Probe The touch hold circuit works in all measurement functions except mA and dB If any valid function is selected and the control switch on the 80T H Probe is pressed the touch hold circuit places a logic zero 5V on the T amp H input pin 16 of the microcomputer At this signal the microcomputer freezes the display with the data present when the control switch was pressed Touch Hold will not operate if Fuse F and or F2 is blown 3 40 Voltage Protection 3 41 Inthe volts mode of operation protection against inputs and transients above the input ratings of the 8050A is provided by metal oxide varistors RV1 RV2 and RV3 and by R1 R2 and Q1 RVI RV2 and RV3 clamp the voltage across the measurem
65. The three resistance ranges with the diode symbol beside the range value provide a measurement RESISTANCE kO 1 DE ENERGIZE CIRCUIT TO BE MEASURED 2 SELECT RANGE 3 SELECT FUNCTION 4 CONNECT TEST LEADS voltage sufficient to cause a silicon junction to conduct These ranges 2 kM 200 KO and 20 MO can be used to check silicon diodes and transistors The 2 kQ resistance range is the preferred diode and transistor testing range and is labeled with the largest diode symbol L Fora silicon diode the typical forward bias voltage on the 2 kO range is 0 6V A reversed bias silicon diode should display the overrange indicator on the 2k0 range 2 32 Relative RELATIVE 2 33 Figure 2 8 describes how to operate the 8050A for relative measurements The relative function stores a reading as an offset or relative reference value When the RELATIVE switch is set to ON during a measurement the value of that measurement is stored and the REL relative reference annunciator appears to the right of the zeroed display Subsequent measurements in the same function and range are displayed as the difference between the measured value and the stored relative reference HIGH LOW Figure 2 5 Resistance Operation 2 7 OPERATION CONDUCTANCE CONDUCTANCE S 1 0 1 DE ENERGIZE CIRCUIT TO BE MEASURED 2 SELECT RANGE 3 SELECT FUNCTION 4 CONNECT TEST LEADS Tv M NOTE Zero the display
66. WIRE ASSEMBLY RED 53 159 87336 537159 i NZ WIRE ASSEMBLY BLK 337167 89326 337167 i W3 WIRE ASSEMBLY WHT 287076 89536 487096 i Na WIRE ASSEMBLY BLIO 499104 89336 489104 i WS WIRE ASSEMBLY WHT 489120 87536 487120 1 us WIRE ASSEMBLY GRN YEL 489112 87336 487112 i XU17 SOCKET IC 429282 09922 DILBAOP 108 i XU18 20 SOCKET 14 PIN 276327 07722 DILBSP 108 3 Yi CRYSTAL 4 MHZ 474072 89536 474072 i i Please be aware of voltage changes a2 Certain components aay not be used therefore say not be installed Ui P N 510941 may be used in place of B N 501080 4 N 510834 may be used in place oF P N 312905 LIST OF REPLACEABLE PARTS j SEULCTED PARTS mar NOT BE INSTALLER FACTORY et qi st Se TART st 1531 SB 10 CAUTION SUBJECT TO DAMAGE BY STATIC ELECTRICITY 8050A 1601 2 8050A A1 Main PCB Assembly Figure 5 5 10 LIST OF REPLACEABLE PARTS 8050A 1601 Figure 5 2 8050A A1 Main PCB Assembly cont 5 11 8050A NERO REN 5 12 01121 01295 02735 04713 07263 07910 09214 09922 11503 Table 5 3 Federal Supply Codes for Manufacturers Allen Bradley Co Milwaukee Wisoncsin Texas instruments Inc Semiconductor Components Div Dallas Texas RCA Corp Solid State Div Somerville New Jersey Motorola Semiconductor Products ine Phoenix Arizona Fairchild Semiconductor Div of Fairchild Camera amp Instrument Carp Mountain Vie
67. adding on all sides Dated proof of purchase may be required for in warranty repairs 4 6 Fluke Technical Service Centers are also available for calibration and or repair of instruments that are beyond the warranty period Call the number listed above for shipping instructions Ship the instrument and remittance in accordance with the instructions received 4 7 GENERAL INFORMATION 4 9 interior Access 4 10 The instrument has two pcb assemblies the Main PCB Assembly and the Display PCB assembly To gain access to the calibration adjustments the backup fuse or the ac line transformer only the case needs to be removed Some troubleshooting can also be accomplished with only the case removed Other troubleshooting procedures may require the removal of the Display PCB assembly CAUTION To avoid contaminating the pcb assemblies with oil from the fingers handle the assemblies by the edges or wear gloves If an assembly does become contaminated referto the information on cleaning pcb s given later in this section 4 1 MAINTENANCE ACCESS PROCEDURES Table 4 1 Required Test Equipment INSTRUMENT TYPE REQUIRED CHARACTERISTICS DMM Calibrator DC Voltage 0 to 1000V 006 AC Voltage 100 Hz Oto 750V 1 06 200 Hz 0 to 2V 1 06 1 kHz D to 750V 2 06 10 kHz O to 100V 4 06 20 kHz O to 100V 2 1 50 kHz O to 20V 1 596 DC Current D to 2000 mA 4 035 AC Current 19 mA 100 Hz 1 196 RECOMMENDED MODEL John Fluke Modei 51008
68. asured voltage is beyond the limit then WARNING replacement of the RMS Converter is indicated DANGEROUS VOLTAGES EXIST ON PCB ASSEMBLIES EXPOSED FOR TROUBLE 7 Measure the voltage at pin 6 of the RMS SHOOTING EXERCISE CAUTION WHEN Converter If this voltage is greater than 0 5 MAKING MEASUREMENTS ON LIVE mV of the recorded value in step 5 adjust the CIRCUITS AND USE AN INSULATED TOOL potentiometer on the RMS Converter so that FOR ALL ADJUSTMENTS SET POWER TO pin 6 is 0 2 mV of pin 7 OFF BEFORE REPLACING ANY COM PONENT OR DEVICE 7 Perform the Calibration Adjustments 4 58 The following information is provided to help 4 57 TROUBLESHOOTING isolate faults and direct the technician to possible causes Signal level or node description by test point is given in CAUTION Table 4 12 A troubleshooting guide is presented in Table 4 13 This guide is intended to be used in conjunction with The pcb assemblies used in the 8050A contain the Performance Tests After completing the tests note CMOS components which are static sensitive any discrepancies that have occurred find the test Please read and comply with the information heading in Table 4 13 and theapparent symptom and use on the static awareness sheet given in the the possible cause as a starting point in troubleshooting beginning of this section the problem Table 4 11 U33 Jumper Positions DISPLAY READING JUMPER CONFIGURATION MP20 All Jumper Pins Installed AS VIEWED
69. b Do 90 0000 e 8 gt o o O wo 0588 88 88 B ce s O CRS O OO 6 oo 00 6 O o oO O CR10 o9 6 600606 o o9 O O CR11 O o9 o 00 OO Q o Q 0 O 6 CO 6 oo 1 cR O 0 o 0 o 0 OG o 9 00 60 oq O o O DISPLAY P C B e 57 Ug REV p ud O ome 0000 5 O O O OO O O O O O OO O S O o 00000000 200000000 00000000 00000000 00000000 000000000 o OO a E oo 000000000 go pu y U S o 9o Oo pem O 0 8 o Figure 4 1 Display PCB Access MAINTENANCE ACCESS PROCEDURES 3 Using your fingernail pry the grey tabs on the LCD bezel free from the screw posts and remove 4 Toreassemble reverse the above procedures in a logical order 4 19 BACKUP FUSE REPLACEMENT 4 20 Use the following procedure to replace the backup fuse F2 I Complete the Calibration Access procedure 2 Using a wide flat blade screwdriver pry the fuse out from the fuse holder Refer to Figure 4 1 for the location of F2 3 Replace the defective fuse a 3A 600V fuse mfg part no BBS 3 4 21 AC LINE VOLTAGE SELECTION 4 22 The 8050A is configured at the factory for a specific ac line voltage The configured ac line voltage is listed on a decal located on the bottom of the unit Line voltage changes require the ordering of a new transformer for the instrument Refer to the Main PCB Assembly parts list in Section 5 for the part number of the required transformer NOTE Instruments with Option 8050A 01 Rechargeabl
70. cale at 20 Hz CREST FACTOR RANGE 005 Waveforms with a Peak RMS ratio of 1 1 to 3 1 at full scale FULL SCALE VOLTAGE ACROSS DESDE TON UNKNOWN RESISTANCE 20001 0 012 209 0 1 reading 2 digits 029 E a ere G 200 kO 102 I o OF reading igits 2V 2V PONT a ee Resistance ACCURACY for 1 Year OVERLOAD PROTECTION susrrassasa 500V dc ac rms on all ranges OPEN CIRCUIT VOLTAGE u Less than 3 5V on all ranges RESPONSE TIME x 10 seconds maximum on 20 MQ range 2 seconds maximum on all TO RATED ACCURACY other ranges DIODE ee ee ee en eee a These three ranges have enough voltage to turn onsilicon junctions Jet to check for proper forward to back resistance The 2 kQ range is preferred and is marked with a larger diode symbol on the front panel ofthe instrument Thethree non diodetest ranges will notturn on silicon junctions so in circuit resistance measurements can be made with these three ranges 1 4 INTRODUCTION SPECIFICATIONS Table 1 2 8050A Specifications cont Conductance RANGE 2mS RESOLUTION ACCURACY for 1 Year 1 uS 10 MQ 0 196 of reading 5 digits 200 nS 01 nS 100 000 MQ MAXIMUM OPEN CIRCUIT VOLTAGE 3 5V 0 596 of reading 20 digits OVERLOAD PROTECTION 500V dc ac rms on all ranges CONDUCTANCE UNITS Vti sealer wearers S IC A We use the international unit of conductance
71. ces less than 200 0 the effect of test lead resistance may add a significant error This error may be compensated for by using the relative function of the 8050A Use the following procedure to compensate for test lead resistance I Setup the 8050A as shown in Figure 2 5 steps 1 through 3 2 Short the test leads together press the test leads together firmly and set the RELATIVE switch to ON 3 Disengage the test leads and proceed with low level resistance measurements The resistance of the test leads will be subtracted from the readings of subsequent measurements 2 60 RESISTANCE COMPARISONS 2 61 When one resistance value is needed for several measurements e g sorting resistors to find a matched pair the relative function of the 8050A can be used to simplify the process The following procedure is an example of how the relative function may be used to match resistors 1 Select the KQ function on the 8050A 2 Select an appropriate range for the resistance being matched 3 Measure the resistor 2 14 4 With the resistor value still displayed set the RELATIVE switch to ON 5 Measure the other resistors Choose the resistor with the least deviation from the resistor first measured 2 62 Conductance Measurement 2 63 The following paragraphs contain additional information on and measurement techniques for conductance measurements 2 64 HIGH RESISTANCE MEASUREMENTS 2 65 The conductance function
72. continue to charge until the end of the 100 millisecond Integrate period The microcomputer controlled Integrate period is exactly the same length for every measurement cycle regardless of the range and function selected 3 12 After the microcomputer ends the Integrate period it prevents the integrate capacitor C9 from charging or discharging during a brief Hold period During the Hold period the microcomputer examines the polarity of CM to determine the polarity of the unknown input to the DMM 3 13 Since CM is negative the microcomputer initiates the Read period with the DE R de integrate plus reference command Part C of Figure 3 2 CMOS switch U18B connects the buffer input to COMMON and CMOS switches U20A and U20B connect C7 in the buffer feedback loop so that the integrator input is a known level 1V of the opposite polarity from the input signal The integrate capacitor C9 begins to discharge and the microcomputer starts to count from 00000 The count accumulates until C9 discharges to its initial level The instant C9 reaches its initial level the comparator toggles CM positive stopping the count in the microcomputer The count in this case will be 10 000 This count with the appropriate decimal point is numerically the same as the 1 0000V dc input to the DMM 3 14 The third set of waveforms shows the timing that would result from a positive full scale input in our example 1 9999V dc Note that for positive
73. contributing to measurement accuracy The plastic housing provides for operator safety while measuring potentially dangerous voltages 600 31 RF Probe 83RF 600 32 The 83RF converts the 8050A into a high frequency 100 kHz to 100 MHz ac voltmeter over a 600 4 voltage range of 0 25V to 30V rms The DC output of the probe is calibrated to be equivalent to the rms value of a sine wave The probe is used with the DC V function and ranges of the 8050A 600 33 RF Probe 85RF 600 34 The 85RF converts the 80504 into a high frequency 100 kHz to 500 MHz ac voltmeter over a voltage range of 0 25V to 30V rms The dc output of the probe is calibrated to be equivalent to the rms value of a sine wave The probe is used with the DC V function and ranges of the 8050A 600 35 DC AC Current Probe Y8100 600 36 The Model Y8100 DC AC Current Probe is a battery powered four AA cells Hall Effect probe for use with the 8050A to take dc ac or composite ac or dc current measurements The clamp on jaws on the Y8100 allow it to clamp around conductors up to 3 4 inch in diameter The pistol shape allows safe easy one hand operation when making current measurements The Y8100 has detachable leads and is used in conjunction with the voltage inputs of the 8050A 600 37 AC Current Transformer Y8101 600 38 The Model Y8101 Current Transformer Figure 1 is a small clamp on current transformer designed to extend the current measuring capabilit
74. converter that is proportional to the unknown input signal The a d converter working in conjunction with the microcomputer converts the dc analogue of the unknown input signal to a digital value The microcomputer processes the digital value and displays the result on the LCD 3 5 CIRCUIT DESCRIPTION 3 6 The following paragraphs describe each of the major circuits in detail 3 7 A D Converter 3 8 The a d converter in the 8050A uses the dual slope method of conversion In this method the voltage analogue of the input signal proportional to the unknown input signal is allowed to charge a capacitor integrate for an exact length of time The capacitor is then discharged by a reference voltage The length of time required for the capacitor to discharge is proportional to the unknown input signal The microcomputer measures the discharge time and displays the result The following Section 3 Theory of Operation paragraphs discuss the actual a d conversion in more detail 3 9 The microcomputer controls the a d converter via CMOS switches Figure 3 2 shows the simplified circuits formed during the major periods of a d conversion cycles Figure 3 3 is a timing diagram that shows the a d converter cycle resulting from three different input signals Assume in reading the following paragraphs that the DC V function and the 2V range are selected and the DMM is nearing the end of the Autozero period in its conversion cycle 3
75. d conductance measurement functions 1 Select the KO function 2000 2 Connect the DMM Calibrator to the 8050A as follows HI to the V kQ S input connector and LO to the COMMON input connector 3 For each step in Table 4 7 select the range shown and adjust the DMM Calibrator to the required 8050A resistance input then verify that the 8050A display reading is within the limits 4 This concludes the Resistance and Conductance Tests Remove power from the DMM Calibrator before nini the test setup 4 7 MAINTENANCE LINEAR VOLTAGE TEST Table 4 7 Resistance and Conductance Tests ELE Y m 3 200 00 00 to 00 04 2002 99 88 to 100 14 2 k 2 9988 to 1 0012 20 kQ 9 993 to 10 007 200 kQ 99 93 to 100 07 2000 kQ 997 2 to 1002 8 20 MQ 9 972 to 10 028 2 mS 9985 to 1 0015 200 nS 99 30 to 100 70 O O Y OQ 0 FP QN 4 42 CALIBRATION ADJUSTMENTS 4 43 Under normal operating conditions the 8050A requires calibration once every year Calibration adjustments are also required after the instrument has been repaired or if it fails any of the Performance Tests Test equipment required for the adjustments is listed in Table 4 1 Figure 4 2 shows the location of all adjustments for the following procedures For verification do the Performance Tests after completing the Calibration Adjustments If portions of the Calibration Adjustments cannot be completed refer to the Jumper Selection pr
76. de without breaking the circuit under test Because of a high efficiency quadrature type of winding wire size and location of the conductor within the transformer jaws do not affect the accuracy of the current measurement 600 25 Current Shunt 80J 10 600 26 The Model 80J 10 Current Shunt extends the current measuring capability of your meter to 10A continuous 20A for periods not exceeding minute dc to 10 kHz at an accuracy of 0 25 600 27 High Voltage Probe 80K 6 600 28 The Model 80K 6 High Voltage Probe extends the voltage measuring capability of your meter upto 6 kV Internally the probe contains a 1000 1 divider The divider is made with special metal film resistors with matched temperature coefficients providing the probe with excellent accuracy and stability characteristics Also the very high input impedance 75 MQ minimizes circuit loading thus contributing to measurement accuracy The plastic housing provides for operator safety while measuring potentially dangerous voltages 600 28 High Voltage Probe 80K 40 600 30 The Model80K 40 High Voltage Probe extends the voltage measuring capability of your meter up to 40 kV Internally the probe contains a 1000 1 divider The divider is made with special metal film resistors with matched temperature coefficients providing the probe with excellent accuracy and stability characteristics Also the very high input impedance 1000 MQ minimizes circuit loading thus
77. default reference impedance has been changed 9 This concludes the dB Voltage Test remove power from the DMM Calibrator before dismantling the test setup 4 38 Current Test 4 39 Use the following procedure to verify the proper operation of the ac and dc current measurement functions 1 Select the DC mA function 2 Connect the DMM Calibrator to the 8050A as follows HI to the mA input connector and LO to the COMMON input connector 3 For each step in Table 4 6 select the range shown and adjust the DMM Calibrator to the required 8050A current input then verify that the 8050A display reading is within the limits 4 Select the AC V function 20mA range INPUT STEP SELECT RANGE LEVEL FREQUENCY DISPLAY READING Below 75 dB 37 28 to 38 28 37 28 to 38 28 02 07 to 02 37 5 Adjust the DMM Calibrator for an output 19 000 mA at a frequency of 100Hz 6 Verify that the display reads between 18 800 and 19 200 7 This concludes the Current Test Remove power from the DMM Calibrator before dismantling the test setup Table 4 6 Current Test SELECT DISPLAY STEP INPUT 200 uA 190 uA 189 41 to 190 59 2mA 1 9 mA 1 8941 to 1 9059 20 mA 19 mA 18 941 to 19 059 200 mA 190 mA 189 41 to 190 59 2000 mA 1900 mA 1894 1 to 1905 9 4 40 Resistance and Conductance Tests 4 41 Use the following procedure to verify the proper operation of the resistance an
78. duration on both the 200 mV and 2V ranges DC voltages can also be measured using the dB mode with 01 dB resolution between 5 of range and full range INTRODUCTION SPECIFICATIONS Table 1 2 8050A Specifications cont AC Volts True RMS Responding AC Coupled VOLTAGE READOUT ACCURACY of reading number of digits between 5 of range and fuil range i c RESOLUTION RANGE 20Hz 45Hz 1kHz 10kHz 20kHz 50kHz 10 mV 200 mV 0 1V 2V 1V 20V 10V 200V 100V 750V 1 10 1 10 5 30 Typically 3 to 5 digits of rattle will be observed at full scale at 20 Hz RESOLUTION s s va ties REA ERES 0 01 dB from 5 of scale to full scale 0 1 dB from 1 596 of scale 1 dB below 1 of scale VOLT Hz PRODUCT 107 max 200V max 50 kHz EXTENDED dB SENSITIVITY Typically 72 dB 6000 Ref 1 dB to 10 kHz EXTENDED FREQUENCY RESPONSE Typically 3 dB at 200 kHz COMMON MODE REJECTION gt 60 dB at 50 Hz or 60 Hz RATIO 1 KQ unbalance CREST FACTOR RANGE Waveforms with a Peak RMS ratio of 1 1 to 3 1 at full scale increasing down range INPUT IMPEDANCE v rrr xa 10 MQ in parallel with 100 pF MAXIMUM INPUT VOLTAGE 750V rms or 1000V peak continuous less than 10 seconds duration on both the 200 mV and 2V ranges not to exceed the volt hertz product of 107 RESPONSE TIME ein x ax RERO 2 seconds maximum within a range REFERENCE IMPEDANCES
79. e Battery use a different procedure for changing the ac line voltage Refer to Section 6 for this procedure 4 23 Use the following procedure to change the ac line voltage configuration on the 8050A I Complete the Calibration Access procedure 2 Remove the transformer and replace it one for the intended line voltage 3 Relocate the white wire from the power receptacle to the pcb hole labeled with the correct voltage 4 Remove the case and relabel the ac line voltage designation on the decal at the bottom of the instrument 4 24 dB Reference Impedance Power Up Setting 4 25 The following procedure sets the default at power up dB reference impedance to any one of the 16 available impedances In the standard configuration no diodes installed the default reference impedance is 6000 i Complete the Display PCB Access procedure 2 Locate the diode mounting positions on the Display PCB Assembly just to the right of the calibration access holes viewed from the front of the instrument 3 Refer to Table 4 2 and install diodes as shown for the desired reference impedance 4 Reassembie the instrument Table 4 2 dB Impedance Selection REFERENCE IMPEDANCE EMI id Hd k sd H 44 4 4 Diode Type Use Fluke P N 203323 1N4448 1N914 or equivalent 4 4 4 26 Cleaning CAUTION Do not use aromatic hydrocarbons or chlorinated solvents for cleaning These solutions will react with the pla
80. e is described in Figure 2 12 When assembled and connected to the V k0 S and the COMMON input connector the 8050A can be used to determine the following information about transistors e Transistor type NPN or PNP SCHEMATIC TRANSISTOR UNDER TEST Defective transistors shorted or open e Collector to emitter leakage Icks e Beta from 10 to 1000 in a single range 2 73 Transistor type is determined by setting the switch on the tester fixture to BETA setting the 8050A to the 2 mS range and observing the display reading If a low reading lt 0 0100 is displayed reverse the test fixture at the input connectors If the collector of the transistor is now connected to the COMMON input connector the transistor is a PNP type An NPN type will have its collector connected to the V kN S input connector 2 74 Defective Transistors 2 75 If the transistor is defective the following indications will appear regardless of transistor type or test position 1l An open transistor will produce a display reading of 0 0005 or less TEST FIXTURE P1 PLUG INTO 750kX1 i COMMON AND V KQ nS INPUT 1 ICEs TERMINALS E CONSTRUCTION DETAIL 1 TOGGLE SWITCH J1 TRANSISTOR SOCKET R1 750 kQ 5 1 4W 3 16 HOLE TRANSISTOR SOCKET P1 BANANA PLUG CONNECTOR 0 75 SPACING GENERAL RADIO TYPE 274 MB WIRE TO SWITCH ARM Figure 2 12 Transistor Beta Test Fixture 2 15 OPERATION RELATIVE MEASURE
81. e the following procedure to install an 8050A panel using the nuts provided using a dual mounting kit 2 en T Figure 600 3 Rack Mounting Kits Offset and Center Mounting 600 2 Remove the carrying handles from both instruments by removing the handle disc decals and the handle mounting screws Remove the retaining screw from the rear of the cases and separate the instruments from their cases Install the center mounting bracket as shown in Figure 600 4 and secure it to the mounting panel using the nuts provided Install the clamp screw in the center mounting bracket using the nuts and washers provided Insert the front of the instrument cases through the openings on the back side of the mounting panel Make sure the cases handle mounting bosses are inserted into the clamp hole of the center mounting bracket Tighten the clamp screws Install the side mounting brackets and secure them to the front panel using the nuts provided CENTER MOUNTING BRACKET ACCESSORIES PROBE ACCESSORIES 8 Instali the handle mounting screws through the side brackets into the handle mounting bosses Don t overtighten these screws 9 Slide the instruments through the mounting panel and into their cases Install and tighten the retaining screw at the rear of both cases 600 15 PROBE ACCESSORIES 600 16 The probe accessories are shown in Figure 600 5 and are described in the following paragraphs Table 600 1 contains all app
82. easure an ac signal riding on a dc level An example of this type of signal is shown in Figure 2 16 To obtain an accurate measurement of the total rms value for these signals perform the following steps 1 Measure the ac component of the signal using the AC V function 2 Measure the dc component of the signal using the DC V function 3 Use the following formula with the values obtained in steps l and 2 to determine the total rms value of the signal Total RMS Value V ac component rms dc component 2 17 OPERATION AC VOLTAGE CURRENT MEASUREMENT PEAK VOLTAGES DISPLAY READINGS DC AND AC TOTAL RMS nn CE ACCOMPONENTONLY ACCOMPONENTONLY WAVEFORM PEAK to PEAK PEAK wer S SEGA COMPONENT TRUE RMS ONLY Vac dc 2 828 1 414 1 000 1 000 0 000 1 000 RECTIFIED SINE FULL WAVE PK Y 1 414 1 414 0 421 0 436 0 900 1 000 Mz 9 RECTIFIED SINE HALF WAVE 2 000 2 000 0 779 0 771 0 636 SQUARE PK al rM 2 000 1 000 1 111 RECTIFIED SQUARE 1 414 1 414 0 785 2 000 sly le T D X Y PK PK TU RECTANGULA RMS CAL IS THE DISPLAYED VALUE FOR AVERAGE RESPONDING METERS PULSE TRIANGLE THAT ARE CALIBRATED TO DISPLAY RMS FOR SINE WAVES SAWTOOTH 3 464 Figure 2 14 Waveform Comparisons 2 18 WAVEFORM CREST FACTOR SQUARE WAVE SINE WAVE TRIANGLE SAWTOOTH MIXED ANN FREQUENCIES 1 414 to 2 0 SCR OUTPUT 1414 to 3 0 OF
83. ent circuitry at approximately 1200V while R1 and R2 limit the input current 3 42 In the kN mode of operation protection is provided by thermistor RTI and the clamp zener action of Q2 As RTI heats up its resistance increases sharply 3 43 Current Protection 3 44 In the current mode of operation diode bridge U28 and diode CR clamp the voltage across the current shunts until the fuses F1 and F2 blow Backup fuse F2 is used to clear open voltages between 250V and 600V Table 3 1 AC Buffer Gains FIRST SECOND OVERALL RANGE BUFFER BUFFER GAIN 200 mV Auto range only X1 X10 X100 dB only 200 mV X10 Linear 2V 20V 200V 750V X1 X1 X1 THEORY OF OPERATION TRUE RMS CONVERTER GIVEN Vrms V Vi Where Vi is the instantaneous ac voltage THEN Vrm Vi Vrms ET antilog log v antilog 2 log Vi log Vimal Vrms ee aam a f AC BUFFER AMPS AC T E SIGNAL gt gt ABSOLUTE O A D CONVERTER Vi 1 VALUE CIRCUIT CONTROL a X1 X10 X100 ANTILOG A 5 CONVERTER LOG CONVERTER ACX1 ACX100 12 log Vi log Vrms A og Vi S log Vrms SN CONVERTER 777 en FROM MICROCOMPUTER Figure 3 6 RMS Converter 3 9 3 10 A Message From y Fluke Corporation Some semiconductors and custom IC s can be damaged by electrostatic discharge during handling This notice explains how you can m
84. es 2 102 MEASURING AMPLIFIER BANDWIDTH 2 03 The ac voltage dB and RELATIVE functions can be used together to measure the frequency response bandwidth of an ac circuit Use the following procedure to measure the bandwidth of an amplifier 1 Connect the amplifier signal generator load and 8050A as shown in Figure 2 17 2 On the 8050A select the AC V function and a range appropriate for the output of the amplifier 3 Adjust the signal generator for a signal level that is within the input operating range of the amplifier 4 Turn on the test equipment 5 Beginning at a low frequency 20 Hz steadly increase the output frequency of the signal generator while observing the ac voltage reading on the 8050A Typically the ac voltage readings will rise to a peak level out then begin to fall An example of this response curve is shown in Figure 2 17 6 Reduce the output frequency of the signal generator to the peak or start of the upper plateau of the ac voltage readings 7 On the 8050A select the dB function then set the RELATIVE switch to ON This establishes the 0 dB relative reference 8 Increase the output frequency of the signal generator until the dB reading reaches 3 00 dB Note the frequency of the signal generator This will be the upper frequency limit of the bandwidth 9 Decrease the output frequency of the signal generator so the dB readings increase to 0 dB OPERATION AC VOLTAGE CURRENT ME
85. function on the 8050A 2 Set the instrument to the 750V range WARNING THE LOCAL LINE VOLTAGE IS BEING MEASURED IN THE FOLLOWING STEP DO NOT TOUCH THE PROBE TIPS OR ALLOW THE PROBE TIPS TO COME IN CONTACT WITH EACH OTHER WHILE PREFORMING THE FOLLOWING STEP 3 Insert the probe tips into a standard wall socket Note the preceding warning The display should read the local line voltage The HV annunciator should be displayed to the right of the voltage reading 4 Momentarily set the instrument to the 20V range The overrange indicator should be displayed 5 Set the instrument to the 750V range 6 Setthe RELATIVE switch to ON The display should read 000 0 the display will zero momentarily and will then display the relative voltage of the line fluctuations and the REL annunciator appears 7 Remove the test leads from the wall socket 8 Set the RELATIVE switch to OFF 9 Select the resistance function The overrange indicator should appear in the display 10 Set the instrument to the 2000 range and short the test leads The display should read 00 00 li Select the S 1 0 conductance function 2 mS range The display should read 0000 5 counts 2 12 12 Short the test leads The overrange indicator should appear in the display 13 Select the dB function then push the REF Z right most range switch The turn on dB reference value nominally 600 should appear on the display for approximately t
86. h FILM 89 GK 1 1 84 DEP CAR if 5Z 1 48 DEP CAR 20 4 5 1 4 MTL FIL 900 0 1X 1 84 MIL FILM 90 0 1 1 64 Ud 9 1524 14 COMP 100K Kae YE ow COP 2 2M 10 1 28 COMP 22 5 1 48 DEP CAR 100 5 COP 4 7 t 5x DEP CAR DEP CAR COMP 1 108 1 48 1 44 12 5 1 4 9 1 5x 1 49 10 10 1 24 DEP CAR IK 5 1 48 VAR ih 10 1 2 DEP CAR 4704 5Z 1 43 CURT 070 10 1 24 DEP CAR IN 3 1 28 DEP CAR iff 5 1 48 MTL FILM SOK 1 1 84 DEP CAR 15K 32 1 4 COMP 4 7 5 1 4 DEP CAR 15K 3 1 48 DE FILM 232K 12 DEP CAR 27K DEP CAR 730K t 3X 1 04 DEP CAR 100 34 1 40 COMP 4 70 3 1 40 FXD 27K 4 5 1 4 DEP CAR 8 2K t 5x DEP CAR 15K 47 52 DEP CAR 27K 5 DEP CAR 20 5 COMP 47H 102 1 20 COMP 4 76 4 5X 1 48 DEP CAR iff t 3X 1 4 DEP CAR 470K t 5X 1 4d CAR DEP i 3 1 48 1 44 1 4 1 4 1 44 THERMISTOR VAR ISTOR VARISTOR 220046 442178 441303 108092 343426 342634 108415 348987 261677 248854 276618 368779 241301 442525 348771 220045 441501 441675 348854 441501 146415 342634 337645 446849 447672 MFG SPLY COBE MFG PART NO PS4563 447730 44973 CF SS3062F CR251 4 SP 1H CRZ51 4 5p20E CHE 53201 Cr 55902 451962 285056 285056 82263 CR251 4 5P100E 224733 CR251 4 5P12 UR251 4 5p9E1 EB1001 CR251
87. he part location and its reference designator 5 3 PARTS ORDERING INFORMATION 5 4 Electrical components may be ordered directly from the manufacturer by using the manufacturer s part number or from the John Fluke Mfg Co Inc and its authorized representatives by using the part number under the heading FLUKE STOCK NO Final assemblies are normally not available as a whole assembly 5 2 5 5 To ensure prompt delivery of the correct part include the following information Il Fluke Stock Number 2 Description as given under the DESCRIP TION heading 3 Reference Designator 4 Quantity 5 Part Number and Revision Level of component s pcb 5 6 Parts price information is available from the John Fluke Mfg Co Inc or its representatives LIST OF REPLACEABLE PARTS Table 5 1 8050A Final Assembly MFG m DESCRIPTION SPLY MFG PART NO L cont FINAL ASSEMBLY FIGURE 5 1 8050A Al MAIN PCB ASSEMBLY LINE 1 Fi FUSE FAST ACT 2A 376382 71400 AGX 2 1 F2 FUSE FIBRE 3A 6004 475004 71400 BBS 3 i Hi SCREW PHP 6 32 X 1 4 385401 73734 19042 H HZ SCREW PHP 6 32 X 1 2 320051 89536 320051 r4 H3 SCREW RHP 4 40 X 1 4 236156 89536 256154 3 H4 SCREW THD FORMING 5 20 X 5 16 494641 89536 494641 4 HS SCREW SEHS 6 32 X 1 4 178533 87536 178533 3 H6 SCREW PHP 6 32 X 3 8 288266 89534 288266 2 HZ WASHER 6 FLAT 340505 897536 340503 2 di CABLE DISPLAY INTERCONNECT 307723 89536 307723 1 LEDI DISPLAY LI
88. hree seconds followed by the other 15 stored dB reference impedances sequencing through at a 1 second rate 14 Push one of the other range switches noting the value of the reference impedance wait a few seconds then push the REF Z switch again The value that appeared when the range switches were changed should appear for 3 seconds followed by the sequence of the other reference impedances 15 This concludes the Initial Checkout procedure for the 8050A If the performance of the instrument is in question refer to the Performance tests in Section 4 of this manual 2 41 APPLICATIONS 2 42 The following paragraphs contain information on and measurement techniques that expand the use of the seven primary functions of the 8050A These applications are arranged by the measurement type 2 43 DC Voltage Measurement 2 44 The following paragraphs contain additional information on and measurement techniques for dc voltage measurements 2 45 REFERENCING DBM TO CIRCUIT IMPEDANCES 2 46 The 8050A provides 16 commonly used circuit impedances to use as a reference impedance when making dBm measurements However this does not cover all circuit impedances There are two procedures for referencing dBm measurements to other circuit impedances The first one requires an ac or dc voltage standard The second procedure is actually a correction factor that can be used if a voltage standard is not avallable 2 47 Use the following proced
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90. impedance is low compared to the input impedance of the DMM this error may be insignificant For example when measuring a circuit with a source impedance of I kO or less the error will be lt 01 If the circuit loading error is significant use the appropriate formula contained in Figure 2 10 to calculate the percentage of error 2 51 Current Measurement 2 52 The following paragraphs contain additional information on and measurement techniques for current measurements OPERATION RESISTANCE MEASUREMENT WARNING OPERATOR INJURY AND INSTRUMENT DAMAGE MAY RESULT IF THE BACKUP FUSE F2 BLOWS WHEN CURRENT IS BEING MEASURED FROM A VOLTAGE OF GREATER THAN 600 VOLTS 2 53 BURDEN VOLTAGE ERROR 2 54 When a multimeter is placed in series with a circuit to measure current the voltage drop of the multimeter induces an error This error is called the burden voltage The maximum full scale burden voltages for the 8050A are 0 3V for the four lowest ranges and 0 9V for the highest range 2 55 These voltage drops can affect the accuracy of the current measurement if the current source is unregulated and the resistance of theshunt and fuses of the multimeter exceeds 1 1000 of the source resistance If the multimeter burden voltage is significant the formula in Figure 2 11 can be used to calculate the burden voltage error 2 56 Resistance Measurement 2 57 The following paragraphs contain additional information on and measureme
91. in pcb with red to and black to 9 Reinstall the instrument in its case 601 14 Fuse Replacement 601 15 Use the following procedure to replace the main power fuse F3 1 Complete the Calibration Access procedure given in Section 4 of this manual 2 F3islocated immediately in front of the power receptacle a For 100V and 120V instruments replace F3 with a 1 16A 250V type MDL fuse b For 240V instruments replace F3 with a 1 32A 250V type MDL fuse 601 16 8050A 01 Line Voltage Selection 601 17 Use the following procedure to change the operating ac line voltage on the 8050A 01 I Complete the Calibration Access procedure given in Section 4 of this manual 2 Locate the ac line selection holes on the Main PCB Assembly The white wire from the power receptacle will be soldered in one of the holes 3 Relocate the white wire from the power receptacle to the pcb hole labeled with the intended voltage 4 Reinstall the case and relabelthe ac line voltage designation on the decal at the bottom of the instrument 601 18 LIST OF REPLACEABLE PARTS 601 19 Tables 601 2 and 601 3 list replaceable parts for the 8050A 01 Figures 601 1 and 601 2 are the component location diagrams for the 8050A 01 OPTIONS RECHARGEABLE BATTERY 01 OPTION Table 601 2 8050A 01 Final Assembly FLUKE DESCRIPTION MFG PART NO 80504 FINAL ASSEMBLY BATTERY OPTION 01 WITH BATTERY OPTION FIGURE 601 1 8050
92. inimize the chances of destroying such devices by 1 Knowing that there is a problem 2 Leaning the guidelines for handling them 3 Using the procedures packaging and bench techniques that are recommended The following practices should be followed to minimize damage to S S static sensitive devices 3 DISCHARGE PERSONAL STATIC BEFORE HANDLING DEVICES USE A HIGH RESIS 1 MINIMIZE HANDLING TANCE GROUNDING WRIST STRAP 2 KEEP PARTS IN ORIGINAL CONTAINERS UNTIL READY FOR USE 4 HANDLE S S DEVICES BY THE BODY 5 USE STATIC SHIELDING CONTAINERS FOR HANDLING AND TRANSPORT 6 DO NOT SLIDE S S DEVICES OVER ANY SURFACE IN WORK AREA PORTIONS REPRINTED WITH PERMISSION FROM TEKTRONIX INC AND GENERAL DYNAMICS POMONA DIV Dow Chemical 7 AVOID PLASTIC VINYL AND STYROFOAM 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 HELPS PROTECT INSTALLED S S DEVICES 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 9 93 Section 4 Maintenance WARNING THESE SERVICING INSTRUCTIONS ARE FOR USE BY QUALIFIED PERSONNEL ONLY TO AVOID ELECTRICAL SHOCK DO NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN THE OPERATING IN
93. licable specifications for the probes 600 17 Touch Hoid Probe 80T H 600 18 The 80T H is a direct signal through test probe with a touch and hold feature Touch and Hold allows voltage resistance and conductance readings to be held on the DMM display following the measurement This convenience also allows greater safety because the operator can concentrate on the placement of the probe and read the display later The Touch and Hold feature is activated by a push button located on the probe Pressing this push button holds the present reading on the DMM display until the push button is released Figure 600 4 Rack Mounting Kit Side by Side Mounting 600 3 ACCESSORIES PROBE ACCESSORIES 600 19 Temperature Probe Celsius 80T 150C 600 20 The 80T1 150C Temperature Probe converts your instrument into a direct reading 1 mV de degree Celsius thermometer It is suited for surface ambient and some liquid measurements A rugged fast responding probe tip with a 350V dc standoff capability makes the 80T 150C a versatile and easy to use temperature probe 600 21 Temperature Probe Fahrenheit 80T 150F 600 22 The 80T 150F is the as the 80T 150C except the 80T I50F is set to read in degrees Fahrenheit 600 23 Current Transformer 801 600 600 24 The Model 801 600 Current Transformer extends the maximum 2A ac current measuring limit of the 8050A to a maximum of 600A The clamp on transformer design allows measurements to be ma
94. n against rough handling and adverse environmental conditions The C86 contains a separate storage compartment for test leads power cord and other compact accessories Figure 600 2 Modet C86 Carrying Case 600 7 RACK MOUNTING KITS 600 8 Three rack mounting kits are available for mounting your instrument in a standard 19 inch equipment rack The kits allow the 8050A to be mounted in the center offset or side by side Dual in a standard 19 inch equipment rack 600 9 Installation 600 10 Installation instructions for the rack mounting kits are given in the following paragraphs 600 1 ACCESSORIES 600 11 OFFSET AND CENTER MOUNTING KITS 4 Insert the front of the case through the opening MO00 200 611 AND M00 200 612 on the back side of the mounting panel 600 12 Use the following procedure to install an 8050A using a center mounting or an offset mounting kit 5 Install the handle mounting screws through the side brackets into the mounting bosses Don t 1 Remove the carrying handle by removing the overtighten these screws handle disc decals and the handle mounting a 6 Slide the instrument through the mounting panel and into the case Install and tighten the 2 Remove the screw from the rear of the case and retaining screw at the rear of the case remove the case 3 Install the side mounting brackets as shown in 600 13 DUAL MOUNTING KIT M00 200 613 Figure 600 3 and secure them to the mounting 600 14 Us
95. ne of the measurements should be accepted as being within the specified limits Normally when the BT annunciator appears recharge the batteries as soon as possible 601 7 To recharge the batteries connect the 8050A 01 to line power and set the POWER switch to the OFF position If the POWER switch is set to the ON position the batteries receive a reduced charge that is sufficient to maintain their charge level but insufficient to charge the batteries to a higher level Table 601 1 8050A 01 Specifications 8050A 01 BATTERY OPTION BATTERIES TYPE NiCAD OPERATING TIME 10 hours typical RECHARGE TIME with POWER switch in OFF position 14 hours for full charge POWER CONSUMPTION 6 W max LINE VOLTAGE 90 264V 47 440 Hz field changeable STANDARDS IEC 348 Protection Class 1 when operated from supply mains Protection Class 2 when operated from internal batteries 601 1 OPTIONS RECHARGEABLE BATTERY 01 OPTION kanann 601 8 THEORY OF OPERATION 601 9 The theory of operation of the 8050A 01 is illustrated by the main pcb schematic in Section 7 The battery power supply is shown below the standard power supply on Sheet I of the schematic The 8050A 01 can be used with line voltage from 90V to 264V 47 to 440 Hz To select the proper line voltage configuration refer to the 8050A 01 AC Line Voltage procedure given later in this subsection Fuse F3 provides protection for the power supply Line power i
96. nput is rectified filtered and regulated The output of the power supply acts as a current source for the battery The battery determines the voltage level into the power converter Do not operate the 8050A 01 with the battery removed The power converter uses the flyback transformer technique to develop several output voltages so that 13V 10V 6V and 5V with respect to power supply common are available 609 10 When the battery voltage drops below approximately 4V the BT annunciator appears in the display 601 11 MAINTENANCE WARNING THESE SERVICING INSTRUCTIONS ARE FOR USE BY QUALIFIED PERSONNEL ONLY TO AVOID ELECTRICAL SHOCK DO NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN THE OPERATING INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO 601 12 Battery Replacement 601 13 Use the following procedure for removing and replacing batteries I Complete the Calibration Access procedure given in Section 4 of this manual 2 Turn the instrument upside down 3 Unplug the red and black battery wires for both battery packs from the pcb pins 4 Apply pressure to the front and rear sides of the battery cases to disconnect the cases from the Main PCB Assembly 5 Remove the blotting papers 601 2 6 Replace the batteries and blotting papers with new Fluke battery assemblies 7 Reconnect the battery cases to the Main PCB Assembly 8 Connect the battery wires to their appropriate pins on the ma
97. nt techniques for resistance measurements 1 DC VOLTAGE MEASUREMENTS Loading Error in 96 100 x Rs Rs 107 Where Rs Source resistance in ohms of circuit being measured 2 AC VOLTAGE MEASUREMENTS First determine input impedance as follows E E V1 27F Rin Cin Where Zin effective input impedance Rin 107 ohms Cin 100 x 1071 Farads F frequency in Hz Then determine source loading error as follows Loading Error in 96 100 x Pun Where Zs source impedance Zin input impedance calculated Vector algebra required Figure 2 10 Circuit Loading Error OPERATION RESISTANCE MEASUREMENT Es Source voltage Ri Load resistance Source resistance Im Measured current display reading in amps Eb Burden voltage calculated Eb meas current 200 current range in mA 35 ERROR Error in 100 x Eb Es Eb Error in A Eb x Im Es Eb EXAMPLE Es 15V Ri 100 kN im 148 51 yA 14851 mA Eb 148 51 x 10 8 x 200 2 35 148 51 x 10 5 x 1000 35 148 56 mV Max error in 100 x 148 56 mV 15V 14856V 1 000396 dd this to the range spec accuracy Max error in 1 0003 1 2 2 digits Max error in A 148 56 mV x 148 51 uA 15000 mV 148 56 mV 1 486 yA Add 1 486 yA to the reading for correct current Figure 2 11 Calculating Burden Voltage Error 2 58 TEST LEAD COMPENSATION 2 59 When measuring low resistan
98. nt the instrument is operational for troubleshooting CAUTION WARNING l The Display PCB is connected to the main peb DANGEROUS VOLTAGES EXIST ON THE by a flexible ribbon cable Interconnect This PCB ASSEMBLIES WHEN ENERGIZED cable remains attached for service operation EXERCISE EXTREME CARE WHEN Avoid straining the interconnect cable while WORKING ON AN ENERGIZED CIRCUIT working on the instrument MAINTENANCE ACCESS PROCEDURES 5 To reassemble reverse the preceding contact strips on the underside of the procedures in logical order Interconnect cable 4 15 DISPLAY PCB REMOVAL 4 To reassemble reverse the preceding 4 16 Use the following procedure to remove the procedures in logical order Display PCB from the instrument 4 17 LCD REMOVAL 4 18 Use the following procedure to remove the LCD Liquid Crystal Display from the Display PCB Assembly 1 Complete the Display PCB Access procedure 2 Remove the screws two from the plastic bar that clamps the Interconnect cable to the Display PCB q l Complete the Display PCB Access procedure 3 Remove the plastic bar and gently lift the Interconnect cable from the sides To avoid 2 Remove the two screws located on the foil side contamination do not to touch the metal of the Display PCB Assembly or pc Es bes E D QS f y be ix 0 i R12 Rit 190K VDC 1 9VDC C2 ct Sd e R6 AS 190VAC 19VAC o D GG 1000VDC 190VDC 10 KHZ 10 KHZ Q
99. nty purchaser must forward the instrument transportation prepaid and a description of the malfunction to the nearest Fluke Service Center The instrument shall be repaired at the Service Center or at the factory at Fluke s option and returned to purchaser transportation prepaid The instrument should be shipped in the original packing carton or a rigid container padded with at least four inches of shock absorbing material FLUKE ASSUMES NO RISK FOR IN TRANSIT DAMAGE THE FOREGOING WARRANTY IS PURCHASER S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR USE FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL INDIRECT INCIDEN TAL OR CONSEQUENTIAL DAMAGES OR LOSS WHETHER IN CONTRACT TORT OR OTHERWISE CLAIMS Immediately upon arrival purchaser shall check the packing container against the enclosed packing listand shall within thirty 30 days of arrival give Fluke notice of shortages or any nonconformity with the terms of the order If purchaser fails to give notice the delivery shall be deemed to conform with the terms of the order The purchaser assumes all risk ofloss or damage to instruments upon delivery by Fluke to the carrier If an instrument is damaged in transit PURCHASER MUST FILE ALL CLAIMS FOR DAMAGE WITH THE CARRIER to obtain compensation Upon request by purchaser Fluke will submit an
100. o ON In this circuit 1 mV becomes the 0 dB reference All subsequent dB measurements in the circuit are displayed as the loss or gain of the circuit m dB TP3 57 5dB D 5V 2 v R Figure 2 13 dB Circuit Gain or Loss Measurements 2 94 The 8050A can measure signals with a crest factor of 3 0 or less at full scale Figure 2 15 illustrates some typical signals and their crest factors The waveforms in Figure 2 15 show that a signal with a crest factor of greater than 3 0 is not common 2 95 To ensure that a signal measured with the 8050A has a crest factor below 3 0 measure the peak value with an ac coupled oscilloscope If the peak value is not more than three times the true rms reading of the 8050A then the signals crest factor is 3 0 or less Another method of verifying the error caused by the crest factor of a signal is to compare the reading of the 8050A with a reading on the next higher range of the 8050A The 8050A crest factor capability increases from 3 0 for readings less than full scale The crest factor capabilty of the 8050A 1s shown by the following equation Crest Factor Capability 3V Range Input The errorcaused by exceeding the crest factor of 3 0 at full scale will be reduced significantly on the next higher measurement range of the 8050A The crest factor capability at 1 10 scale approaches 10 2 96 COMBINED AC AND DC SIGNAL MEASURE MENTS 2 07 It is sometimes necessary to m
101. ocedures given later in this section NOTE On the 80504 set the POWER switch to ON and allow the instrument to stabilize for approximately 5 minutes Perform the calibration adjustments at an ambient temperature of 23 5 C 79 9 F WARNING CALIBRATION ADJUSTMENTS ARE PERFORMED ON ENERGIZED CIRCUITS EXERCISE CAUTION AT ALL TIMES AND USE A NON CONDUCTIVE TOOL FOR ALL ADJUSTMENTS 4 44 DC Calibration 4 45 Use the following procedure to perform a DC Calibration 1 Connect the DMM Calibrator to the 8050A as follows HI tothe V kN S input connector and LO to the COMMON input connector 2 Select the DC V function on the 8050A 3 Turn on the DMM Calibrator 4 8 4 For each step in Table 4 8 select the range shown and adjust the DMM Calibrator for the required 8050A voltage input level then adjust the indicated component to the display limits 5 This concludes the DC Calibration Adjustment Remove power from the DMM Calibrator before dismantling the test setup 4 46 AC Calibration 4 47 Use the following procedure to perform an AC Calibration L Connect the DMM Calibrator to the 8050A as follows HI to the V kQ S input connector and LO to the COMMON input connector 2 Select the AC V function 3 For each step in Table 4 9 select the range shown and adjust the DMM Calibrator to the required 8050A voltage input level and frequency then adjust the indicated component to the dispiay limits
102. od is proportional to the ratio Vex _ UNKNOWN V Vorer REFERENCE V or the ratio of voltage drops across the unknown and reference resistors If any of the other ranges is selected flying capacitor C7 is charged from the high side VH of the reference resistor During the Integrate period the voltage drop across the unknown resistance is integrated During the Read period the low end of the reference resistor VL is connected to the buffer input and C7 is connected in the buffer feedback loop The count is again proportional to the ratio VRS UNKNOWN V VH VL REFERENCE V or the ratio of voltage drops across the unknown and reference resistors 3 17 For conductance measurements the microcomputer sends the DE R command after the Autozero period and then the INT command This inverts the measurements S 1 3 18 Microcomputer 3 19 The microcomputer Figure 3 4 performs four functions control measurement calculation and display drive The positions of the front panel switches determine how the microcomputer performs each of these functions The microcomputer controls the gain and timing of the a d converter and the gain of the ac buffers in accordance with the measurement function and range selected The microcomputer measures the output of the a d converter by accumulating counts n any measurement function the count accumulates linearly count pulses evenly spaced The total count is numerically the same as
103. oin or wide blade screwdriver push in while turning the fuse holder in the direction of the arrow on the front panel decal 5 Pull out the fuse holder and replace the defective fuse 2 13 FRONT PANEL FEATURES 2 14 Before using your multimeter take a few minutes to become familiar with the use of the controls indicators and connectors of the 8050A The front panel features are shown in Figure 2 1 and described in Table 2 l The features of the Liquid Crystal Display LCD are also described in the following paragraph 2 15 Display 2 16 The features of the Liquid Crystal Display LCD are shown in detail in Figure 2 2 The position of the floating decimal point is determined by the range selected for linear measurements The maximum measurement value that can be displayed is one count less than the range selected e g maximum measured voltage that can be displayed in the 200 mV range would be 199 99 mV 2 17 To extend the life of the LCD and to ensure that the display will be ready to operate observe the following precautions e Do not store or use the instrument in temperatures above or below those specified in Section I e Do not store or use the instrument in humidity above that specified in Section 1 NOTE Low temperatures within the specified operating limits will cause the LCD response to be sluggish Avoid prolonged exposure of the LCD to direct sunlight ultraviolet 2 18 SIGNAL INPUT
104. oisy on all ranges Residual reading with test leads open 4 14 Power supply Q6 power switch interconnect microcomputer U17 Touch and Hold on Q11 012 Q17 Power On Reset U17 pin 8 No drive 50 Hz squarewave TP12 U10 interconnect U17 U16 U17 interconnect U16 range switch input to U17 U10 16 interconnect U17 Qut of calibration A D Check TP6 7 and 8 for proper waveforms U18 U19 U20 R2 open A D input U17 U31 U22 Q7 O8 Function switch input to U17 U17 U31 U22 07 08 AC V is out of calibration Fuse F1 F2 R16 R17 R18 UG U28 CRI R3 U1 check 190V dc calibration RV1 RV2 RV3 overheated from severe overload RT1 C39 PCB is contaminated see cleaning procedure in Section 4 ASSEMBLY NAME Final Assembly Al Main PCB Assembly Federal Supply Codes for Manufacturers Fluke Technical Service Centers Section 5 List of Replaceable Parts TABLE OF CONTENTS DRAWING TABLE FIGURE NO NO PAGE NO PAGE 8050A 0 amp 3 5 1 5 3 5 5 4 5 2 5 5 5 2 5 9 5 3 5 12 5 13 5 1 LIST OF REPLACEABLE PARTS 5 1 INTRODUCTION 5 2 This section contains an illustrated listing of replaceable parts for the 8050A Digital Multimeter Ordering procedures for parts and a cross reference to federal supply codes are also provided in this section Both mechanical and electrical components are listed by reference designators Each assembly is accompanied by an illustration showing t
105. ons All of the accessories are in one subsection and the options are presented in separate subsections To facilitate locating a section the paragraph and page numbers correspond with the option number For example the paragraph and page numbers for Option 8050A 01 start from 601 1 All the accessory paragraph and page numbers start from 600 1 A list of replaceable parts and illustrations showing the part location and its reference designator are provided with each option section 6 2 600 1 INTRODUCTION 600 2 This subsection describes the basic use of the accessories available for your 8050A For more detailed information refer to the instruction sheet included with each accessory When nr dering an accessory include its AVIE CLAN JUNE Y TT KAWAKR WANLWE MES taba WW Ae MOME EY s ARAW ELAES EY model name and number 600 3 SOFT CARRYING CASE Y8205 600 4 The Modei Y8205 Soft Carrying Case shown in Figure 600 1 is designed for the storage and transport of the 8050A The case provides adequate protection against normal handling and storage conditions In addition to a shoulder strap the Y8205 includes a storage compartment for test leads power cord and other compact accessories Figure 600 1 Model Y8205 Carrying Case Accessories 600 5 RUGGEDIZED CARRYING CASE C86 600 6 The Modei C86 Ruggedized Carrying Case shown in Figure 600 2 is a molded polyethylene carrying case designed to provide maximum protectio
106. ource VH During the Read period the a d buffer subtracts the voltage on C7 from VL thereby obtaining VOREF 3 30 For conductance measurements the microcomputer inverts the k measurements S 1 1 by reversing the order of the Integrate and Read periods of the a d converter 3 31 True RMS Converter 3 32 The true rms converter is made up of two ac buffers and a hybrid true rms converter 3 33 AC BUFFERS 3 34 The ac buffers consist of operational amplifiers U23 U21 and their associated components Through the buffers the input signal is scaled to a level within the range of the hybrid true rms converter Each buffer has a gain of I or 10 which is controlled by the microcomputer Refer to Table 3 1 for the buffer gains selected for each range In the dB function with the 200 mV range selected the buffers auto range through X1 X10 and X100 gains depending on the input signal level Thus in this mode the 8050A appears to have a single range from 60 dBm to 8 dBm 6000 Reference impedance Upranging occurs at the linear ac range equivalent of 20 000 counts downranging occurs at the equivalent of 1 800 counts 3 35 The output of the first buffer is divided in half and then amplified by a factor of two in the hybrid true rms converter This reduces the required dynamic range of the true rms converter amplifier by a factor of two thereby accommodating waveforms with crest factors up to 3 at full scale 3 36 HYBRID
107. ower On Reset a 500 msec pulse at turn on which initializes the A D REL Relative indicates that the readings displayed are relative to the input applied when the RELATIVE switch was set to ON RNG a RNG b Range inputs to microcomputer RNGc S Siemens 1 4 STO ST1 512 Five sequential Strobe pulses ST3 STA T amp H Touch amp Hold W X a y BCD data lines Z Z Impedance Figure 7 1 Mnemonics KL Addng euri Ajquessy god ULA LY Z anig oO NOLLAYVO 1091 0508 KL 390013 33S NVHOVIO OLLVINIHOS YO o EE A lu EJUS Y lasiizgiissliss s9 es S ws ss 1018 E OSTYS zu 108 KVIN 4 Saad L i Sica TALES S Sa i ABOLIVA mac se is 28 Ossa sin win an 948 83 L4 SmNYHOVIO OLLVA3HOS vr 21jeuayos Ajquiessy God WLR LV 6 7 aby 240 1 NOLLISOd 100 03XV138 YIFHL NI NMOHS 34V S3HO LIMS LOOL VOSOR rL HO 2 109 38NDIA 33S SNOLLVIOT LNINOIWOD NOLLdO AH3 LLV8 10 HOJ ZL YO C8 380514 33 SNOILVIOT LN3NOdWOO NOISH3A INIT HOS M KNdANG ANSLIIV o c pe e O ORE g 0022 i i G29 A A y LE Te X e i du 1 vM 222 e n CON 4 S z i E almo Bs X TEN LON a z f 2 5 O Ep sad i Re dala G MAO Ao SANVHOVIO DLLVIWZHOS ALIQU LOT T3 LEVIS AG JOVAVE OL 193808 NOLLAVO MOWIWOD DOT ZA NOWWOD 35N35 La MOWVIO T1 DIC 5 Sa a SDUMCLOPAIV Wi que SPIA BIN LI MYO TIN BIVAO NI
108. re given in Section 6 of this manual INTRODUCTION SPECIFICATIONS Table 1 1 8050A Accessories MODEL DESCRIPTION DESCRIPTION C86 Ruggedized Carrying Case Current Shunt Y8205 Soft Carrying Case High Voltage Probe M00 200 611 Offset Mounting Kit High Voltage Probe MO00 200 612 Center Mounting Kit RF Probe MO0 200 613 Dual Mounting Kit RF Probe 80T H Touch Hold Probe DC AC Current Probe 80T 150C Temperature Probe Celsius AC Current Transformer 80T 150F Temperature Probe Fahrenheit Deluxe Test Lead Set safety designed 801 600 Current Transformer Slim Flex Test Leads Table 1 2 8050A Specifications ELECTRICAL The electrical specifications given apply for an operating tem perature of 18 C to 28 C 64 4 F to 82 4 F relative humidity up to 90 and a 1 year calibration cycle Functions DC volts AC volts linear and dB DC current AC current resistance diode test conductance relative DC Voltage l nm RANGE RESOLUTION ACCURACY for 1 Year 200 mV 2V 20V 0 03 of reading 2 digits 200V t1000V INPUT IMPEDANCE 10 MQ in parallel with 100 pF all ranges NORMAL MODE REJECTION RATIO gt 60 dB at 60 Hz or 50 Hz COMMON MODE REJECTION RATIO 90 dB at dc 50 Hz or 60 Hz 1 kN unbalanced gt 120 dB available on request COMMON MODE VOLTAGE MAXIMUM 500V dc or peak ac RESPONSE TIME TO l 1 second maximum RATED ACCURACY MAXIMUM INPUT 1000V dc or peak ac continuous less than 10 seconds
109. relative function any voltage level can be used as the 0 dB reference point for dB measurements Figure 2 13 describes how to use the relative function to measure circuit gain or loss in dBs 2 16 2 84 AC Voltage and Current Measurement 2 85 The following paragraphs contain additional information on and measurement techniques for ac voltage and current measurements 2 86 TRUE RMS MEASUREMENTS 2 87 One of the most useful features of the 8050A is the direct measurement of true rms ac voltages and ac current Mathematically rms is defined as the square root of the mean of the squares of the instantaneous voltages In physical terms rms is equivalent to the dc value that dissipates the same amount of heat in a resistor as the original waveform True rms is the effective value of any waveform and represents the energy level of the signal It is used directly in the relationships of Ohm s Law and provides a reliable basis for comparisons of dissimilar waveforms 2 88 Most multimeters in use today have average responding ac converters rather than true rms converters like the 8050A Usually the gain in average responding meters is adjusted so that the reading gives the rms value provided the input signal is a harmonic free sinusoid However if the signal is not sinusoidal the average responding meter does not give a correct rms reading 2 89 The 8050A ac converter calculates the rms value through analog computation This mean
110. s that 8050A readings are accurate rms values for mixed frequencies modulated signals square waves sawtooths 10 duty cycle pulses etc 2 90 WAVEFORM COMPARISON RMS VS AVERAGING METERS 2 9 Figure 2 14 shows the relationship between common waveforms and the display readings of the 8050A compared to average responding meters Figure 2 14 also illustrates the relationship between ac and dc measurements for ac coupled meters For example the first waveform in Figure 2 14 is a sine wave with a peak voltage of 1 414V Both the 8050A and the average responding meters display the correct rms reading of 1 000V the dc component equals 0 However the 1 414V peak rectified square wave produces a correct dc reading 0 707V on both meters but only the 8050A correctly measures the ac component 0 707V The average responding meter measures the ac component of the rectified square as 0 785V which is an error of 5 6 2 92 CREST FACTOR 2 03 The crest factor of a waveform is the ratio of the peak to rms voltage In waveforms where the positive and negative half cycles have different peak voltages the higher voltage is used in computing the crest factor Crest factors start at 1 0 for a square wave peak voltage equals rms voltage OPERATION AC VOLTAGE CURRENT MEASUREMENT Using the dB function on the 8050A measure the voltage at TP1 or intended reference While measuring the intended reference set the RELATIVE switch t
111. stic materials used in the instrument CAUTION Do not allow the LCD to come in contact with moisture Remove the LCD from the Display PCB Assembly before cleaning the pcb and do not install the LCD until the pcb is completely dry 4 27 Cleanthefront paneland case with a mild solution of detergent and water Apply the solution with a soft cloth Do not apply the solution directly to the front panel Clean dust and debris from the pcb s with low pressure 20 psi dry air Clean contaminates from the pcb s with isopropyl alcohol and a soft brush Rinse with demineralized water while scrubbing with a soft brush To dry the pcb s remove any ICs in sockets and use low pressure dry air then bake at 50 to 60 C 124 to 140 F for 24 hours Replace any components removed for cleaning and reassemble the instrument 4 28 PERFORMANCE TESTS 4 29 The performance tests are used to compare the 8050A performance with the list of specifications given in Section 1 We recommended that you run the performance tests for incoming inspection and periodic calibration If the instrument fails any of the performance tests then calibration adjustment and or repair is needed 4 30 initial Procedures 4 31 Before begining each of the tests perform the following Il Remove all test leads 2 Check the fuses and if necessary replace 3 Set the POWER switch to ON and allow the 8050A to stabilize for approximately 5 minutes Conduct the tes
112. the unknown input to the DMM a 1 5001V input results in an accumulated count of 15001 If the dB function is selected the microcomputer calculates the dB reading from the linear reading based on the reference impedance REF Z selected When the RELATIVE switch is set to the ON position the microcomputer drives the display so that the REL annunciator appears and the microcomputer stores the first measurement value as the relative reference This relative reference is algebraically subtracted from subsequent measurements made in that measurement function until the RELATIVE switch is set to the OFF position 23 E co ug O a gt Lb 2 ce SH3NOILLIONOO TVNDIS O nind o EE T E m H31H3ANOO SLNAHS E SWH ANYL iNauuno SSHOLIMS E 3ONVH d a ONY 0 a L H310dWO2OHOIN r o o NOLLONN3 iim E rj O o Ne od NOLLO3 0Hd a DA LNIYYNI 2 9 E WOO u lt NOIL9310Hd JOVLION S Y SH3AIHQ 39N3HU343H e AW1dS10 S UA o 9 YACIAIC INdNI S GWMA E E AWIdSid G91 THEORY OF OPERATION CIRCUIT DESCRIPTION A AUTOZERO SELECTABLE GAIN CIRCUIT k9 8 REFERENCE VOLTAGE INPUT DIVIDER OFFSET VOLTAGES c7 i AND BIAS FOR BUFFER V mA j i AND INTEGRATOR REFERENCE VOLTAGE 1V VR1 7 OVERRANGE OL nce U18A C9 FROM sala ipi nib SIGNAL me A ji i COMPARATOR CONDITIONERS SELECTABLE GAIN CIRCUIT RANGE ann C READ DE R FOR POSITIVE U
113. to 75 C Humidity ss rennen nen lt 90 R H Output Connector o ooooooo o Fits standard 0 75 inch dual banana connectors ACCESSORY ii ass d Vac Y yn BNC to Probe Adapter P N 574756 Y8100 DC AC CURRENT PROBE Ranges ours sedan rx du 20A ac or dc 200A ac or dc Rated Output 222222 neneenerenn 2V at full range Accuracy DOTO 200 HZ RARA AA 2 of range 200 RZ FO KA ta 100A add 3 reading gt 100A add 6 reading Calibration Cycle o oooomo 1 year Frequency Response o omo dc to 1 0 kHz Recommended Load 23 0 KO Temperature Range oooooo 15 C to 35 C for specified accuracy 10 C to 50 C storage and operation at reduced accuracy 600 7 ACCESSORIES PROBE ACCESSORIES Table 600 1 Heating Limitation Working Voitage Rating Aperture Size Size Overall Y8101 AC CURRENT TRANSFORMER Current Range ACCURACY 48 Hz to 10 kHz Division Ratio Working Voltage Insulation Dielectric Withstand Voltage Maximum conductor Size 600 8 Probe Accessories Specifications cont Prolonged operation above 200A ac or 1 kHz can cause damage to the Y8100 Core to output 600V dc or 480V ac maximum output to ground 42V dc or 30V ac 3 4 inch 19 mm diameter 9 x4 1 2 x1 7 16 230 mm x 115 x 37 mm 14 ounces 0 4 kg with batteries Four AA cells Alkaline 20 hours continuous 2A to 150A 12 10A to 150A 18
114. ts in an environment with an ambient temperature of 23 5 C 73 9 F and a relative humidity of less than 80 4 32 Display Test 4 33 Use the following procedure to verify the proper operation of the LCD Select the kQ function 2000 range MAINTENANCE PERFORMANCE TESTS 2 Verify that the overrange indicator 1 is displayed 3 Connect the red test lead to the V kO S input connector and the black test lead to the COMMON input connector 4 Refer to Table 4 3 Short the test leads together and verify that the display reads as shown for each of the resistance ranges Table 4 3 Display Test SELECT RANGE DISPLAY 20022 2 k2 20 kQ 200 KX 2000 k 2 20 MQ 0 000 Due to test lead resistance the least significant digitis may fluctuate by several counts 5 Select the DC V function press the REF Z switch to the in position on and verify that four decimal points appear on the display 6 Select the 200V dc range 7 Connect the DMM Calibrator to the 8050A as follows HI to the V kQ S input connector and LO to the COMMON input connector 8 Adjust the DMM Calibrator until the 8050A displays 188 88V dc exactly 9 Verify that all segments of the 8050A LCD are illuminated and the HV annunciator appears in the display So 10 Set the DMM Calibrator for a 39V dc output 11 Verify that the HV annunciator disappears and the polarity indicator changes to negative 12 Select the
115. ude the following Conductance measurements up to 100 000 MO e Voltage measurements in decibels that can be referenced to 1 of 16 user selected reference impedances Resistance ranges that supply enough voltage to turn on a PN junction to allow diodes and transistors to be tested e The ability to store any input signal as an offset or relative reference value Automatic polarity indication and overrange indication e Protection from overloads and protection from transients of up to 6 kV 10 microseconds Dualslope integration a d conversion to ensure noise free measurements e Long term calibration stability 1 year 1 3 The 80504 is warranted for a period of one year upon shipment of the instrument to the original purchaser Conditions of the warranty are given at the front of this manual The 8050A is typically powered from ac line voltages but may be powered by the optional rechargeable battery 1 4 OPTIONS and ACCESSORIES 1 5 The use of the 8050A can be enhanced by the accessories available for this instrument The accessories are listed in Table 1 1 This instrument can be ordered with the Option 8050A 01 Rechargeable Battery Detailed information on options and accessories is contained in Section 6 of this manual 1 6 SPECIFICATIONS 1 7 Specifications for the 8050A are listed in Table 1 2 Specifications for the Option 8050A 01 Rechargeable Battery and other accessory specifications a
116. ure 601 1 8050A 01 Final Assembly cont 601 5 OPTIONS RECHARGEABLE BATTERY 01 OPTION TA MP31 ta t i H1 MPIGA 5 d J bs E KD ld l 5 ln e S H3 4 Hil BEZEL SECTION il UN A1 DISPLAY BOARD jil o ON SUBJECT TO DAMAGE BY STATIC ELECTRICITY 8050A 01 Figure 601 1 8050A 01 Final Assembly cont 601 6 OPTIONS RECHARGEABLE BATTERY 01 OPTION Table 601 3 A1 Main PCB Assembly DESCRIPTION MEG PART NO TOT de QTY QT Al MAIN PCE ASSEMALY WITH BATTERY OPTION 01 FIGURE 601 2 8050A 4011AAD ci CAP VAR 1 5 0 25 PF 20004 218206 72982 530 000 2 C2 CAP VAR 1 5 0 25 PF 20004 218206 72982 530 000 REF C3 CAP MICA 120 PF 5 SOOV 148486 72136 DMISFiziu 2 CA CAP MICA 120 DF 5 500U 148484 72135 DMISF121d REF CS CAP MICA 1800 PF 54 500V 148353 89536 145353 1 C CAP POLYPROP 10 UF 10 1004 AA amp 7Bi 89534 444781 1 C7 CAP POLYEST 1 0 UF 10 100 447847 37445 C2BOMAH AIN i cB CAP TA 10 UF 20 15V 193623 56289 1950106X0015A1 4 C9 CAP POLYPROP 22 UF 10 1004 444799 89536 444799 1 C10 CAP POLYESTER 022 UF 10 1000U 448183 52763 NAT 1822 322 10 1 C11 CAP MYLAR 047 UF 10 2508 162008 73445 C2BOMAE A47K 2 C12 CAP ELECT 470 UF 10 475 16V 501510 89536 501510 2 C13 CAP ELECT 470 UF 10 75 14V 501510 89535 501510 REF C14 CAP TA 10 UF 202 15V 193423 54289 194D104x0015A1 REF C15 CAP TA 22 UF 20 154 423012 54289 19602
117. ure to reference dBm measurements to impedances that are not provided by the 80504 l Use the following formula to convert the circuit impedance into a reference level Reference Level 3 0 001 x circuit impedance 2 Connect the 8050A to the Voltage Standard as follows V kO S input connector to the Voltage Standard Hi output COMMON input connector to the Voltage Standard low output 3 Select the V function either ac or dc depending upon the Voltage Standard used 4 Adjust the Voltage Standard to output the reference level calculated in step 1 This value should appear in the 8050A display 5 Select the dB function 6 Set the RELATIVE switch to ON Decibel measurements will now be referenced to the circuit impedance 2 48 Usethefollowing procedure to obtain a correction factor for referencing dB to other circuit impedances without the use of a Voltage Standard 1 Select the REF Z that is closest to the impedance of the circuit to be measured 2 Calculate the reference impedance correction factor using the following equation Circuit Impedance 10 log REFZ Correction Factor 3 Add the correction factor to the measured value 2 49 CIRCUIT LOADING ERROR VOLTAGE 2 50 Circuit loading errors occur when voltage measurements are taken on high impedance circuits This is because the DMM loads the source thus changing the operating voltage of the source As long as the circuit impedance source
118. w California Teledyne Corp Continental Device Hawthorne California G E Semi Conductor Products Dept Auburn New York Burndy Corp Norwalk Connecticut Keystone Mfg Div of Avis Industrial Corp Warren Michigan 12040 14099 18324 30035 50157 52072 2763 53217 56289 71400 72136 National Semiconductor Corp Danburry Connecticut Semtech Corp Newbury Park California Signetics Corp Sunnyvale California Jolo industries Inc Garden Grove California Midwest Components Inc Muskegon Michigan Circuit Assembly Corp Costa Mesa California Stettner Trush inc Cazenovia New York Technical Wire Products inc Santa Barbara California Sprague Electric Co North Adams Massachusetts Bussmann M g Div of McGray Edison Co Saint Louis Missouri Electro Motive Mfg Co Williamantic Connecticut 72982 73445 73734 78188 80031 83003 83553 89536 91502 91637 Erie Tech Products Ine Erie Pennsylvania Amperex Electronic Corp Hicksville New York Federal Screw Products Inc Chicago Hiinois Shakeproof Div of iilinois Tool Works Elgin Hiinois Mepco Div of Sessions Clock Co Morristown New Jersey Varo Inc Garland Texas Associated Spring Barnes Group Inc Gardena California Fluke John Mfg Co inc Seattle Washington Associated Machine Santa Clara California Dale Electronics inc Columbus Nebraska
119. y of an ac current meter up to 150A A clamp on coil designed into the probe allows measurements to be made without breaking the circuit under test This coil serves asthe secondary ofa 1 1000 transformer The current carrying conductor being measured serves as the primary 600 39 Deluxe Test Lead Set safety designed Y8134 600 40 The Model Y8134 Deluxe Test Lead Set includes two probes with sharp tips two alligator clips two spade lugs and a spring loaded hook tip Banana plugs are recessed in an insulating shield Probes contain finger guards for additional protection 600 41 Slim Flex Test Leads Y8140 600 42 The Model Y8140 Test Lead Set Figure 1 consists of one red and one black 60 inch 1 52 meter test lead each with a standard banana plug on one end and an extendible tip probe on the other end This flexible metallic tip conductor may be extended up to 2 1 2 inches and is insulated to within 10 of an inch of its tip This insulation reduces the chance of creating an inadvertent short circuit while using the probes in their extended configuration Although the Y8140 test leads are intended for measuring voltages they may also be used for measuring low currents ACCESSORIES PROBE ACCESSORIES S 80T 150C and 80T 150F PIN TIP NEEDLE POINT TEST LEAD SETS TEMPERATURE PROBES TOUCH HOLD PROBE HIGH FREQUENCY PROBES 80K 40 801 600 80J 10 ER CURRENT MEASUREMENT DEVICES

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