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Fluke Welder 8050A User's Manual

1. pene a q ACCESSORIES PROBE ACCESSORIES Table 600 1 Probe Accessories Specifications cont Heating Limitation Prolonged operation above 200A ac or 1 kHz can cause damage to the Y8100 Working Voltage Rating Core to output 600V dc or 480V ac maximum output to ground 42V dc or 30V ac Aperture Size 3 4 inch 19 mm diameter Size Overall 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 Y8101 AC CURRENT TRANSFORMER Current Range 2A to 150A ACCURACY 48 Hz to 10 kHz 2 10A to 150A 8 2A to 10A Division Ratio Working Voltage 300V ac rms maximum Insulation Dielectric Withstand Voltage 3 kV rms Maximum conductor Size 7 16 inch 1 11 cm 600 8 E M s x sasawi p oe per 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 willoperate from either rechargeable batteries or line power If the batteries are fully charged your 8050A willoperate 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 WI
2. 1 2 8050A Controls Indicators and Connectors 2 3 Maximum Input Signal Limits 2 5 Butter a reo 3 8 Required Test Equipment 4 2 dB Impedance Selection 4 4 Display ukwa 4 5 Linear Voltage Test 4 6 dB Voltage Test iia DH I EE Ue E a P Ee 4 7 Current o ua EDEN UE e 4 7 Resistance and Conductance Tests 4 8 DG Calibration 22252 reve ra 4 10 AC Calbration ii dee ere x mex Ra a vb are EAR VT 4 10 US Jumper Positions 4 11 033 Jumper Positions Ires PE 4 12 Test POMS 22 a eee ase 4 13 Troubleshooting Guide 4 14 iii iv FIGURE Frontispiece 1 1 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 2 10 2 11 2 12 2 13 2 14 2 15 2 16 List of Figures TITLE PAGE 8050A Digital Multimeter BOSOA Dimensions 2 65 see 6 1 6 Controls Indicator
3. 2 1 2 4 Unpacking rhe ser wasa 2 1 2 8 AC Line Voltage Requirements 2 1 2 10 Fuse Replacement 2 1 2 13 FRONT PANEL FEATURES 2 2 2 15 Display Rm 2 2 2 18 SIGNAL INPUT LIMITS 2 2 2 20 OPERATING TECHNIQUES 2 3 2 22 AC DC Voltage V eed 2 3 2 24 AC DC Current mA 2 3 2 26 Resistance D 222422 21 9 ia 2 7 2 28 Conductance S 10 2 7 2 30 Diode Test AOS 010 5 Saar ede 27 2 32 Relative RELATIVE 2 7 2 36 Decibel dB ull ass as oh aie 2 11 2 38 INITIAL CHECKOUT PROCEDURE 2 12 241 APPLICATIONS ee e as E Ra S nese s 2 12 2 43 DC Voltage Measurement 2 12 2 51 Current Measurement 2 13 2 56 Resistance Measurement 2 13 2 62 Conductance Measurement 2 4 2 80 Relative Measurement 2 16 2 84 AC Voltage and Current Mea
4. 0 C to 50 C 32 F to 122 F without batteries 40 C to 70 C 40 F to 158 F with batteries 40 C to 50 C 40 F to 122 F 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 20 MQ and 200 nS ranges where it is up to 80 0 C to 35 C 32 95 F 500V dc or peak ac low terminal potential with respect to power line ground 22 cm x 6 cm x 25 cm 8 in x 2 x 10 in see Figure 1 1 1 08 kg 2 Ib 6 02 90 to 110V ac 47 to 440 Hz 105 to 132V ac 47 to 440 Hz 200 to 264V ac 47 to 440 Hz Factory configured for customer specified voltage r t INTRODUCTION SPECIFICATIONS 19 65 in 27 05 cm 8 55 in 21 72 cm 7 50 in 19 05 in 25 15 2 52 in 6 40 cm Figure 1 1 8050A Dimensions 1 6 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 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 orshort shipment to the place of purchase or the nearest Fluke Technical Service Center A list of these
5. 2 KEEP PARTS IN ORIGINAL CONTAINERS UNTIL READY FOR USE 4 HANDLE S S DEVICES BY THE BODY Page 1 of 2 i 5 USE ANTI STATIC CONTAINERS FOR HANDLING AND TRANSPORT 8 HANDLE S S DEVICES ONLY AT A STATIC FREE WORK STATION 9 ONLY ANTI STATIC TYPE SOLDER SUCKERS SHOULD BE USED 10 ONLY GROUNDED TIP SOLDERING IRONS SHOULD BE USED 6 DO NOT SLIDE S S DEVICES OVER ANY SURFACE Anti static bags for storing S S devices 0685 with these devices on them can be ordered from the John Fluke Mfg Co Inc See section 5 in any Fluke technical manual for ordering instructions Use the following part numbers when ordering these special bags John Fluke Part No Bag Size 453522 6 x 8 453530 8 x 12 453548 16 24 7 AVOID PLASTIC VINYL STYROFOAM IN WORK AREA 454025 12 x 15 PORTIONS REPRINTED WITH PERMISSION FROM TEKTRONIX INC AND GENERAL DYNAMICS POMONA DIV 9 Dow Chemical Page 2 of 2 J0089A 07U7906 Litho in U S A yr r 5 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 INSTRUCTIONS 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 proced
6. TEST POINT FUNCTION A D Converter Integrator Output TEST POINT FUNCTION COMMON 13V 6 V 5V 10V A D Converter Input A D Converter Buffer Output MAINTENANCE TROUBLESHOOTING First AC Buffer Output Second AC Buffer Output RMS Converter Output Display Back Plane Drive 50 Hz Square Wave Integrate Control Line 4 13 HW PR EEE RY RIES yo RREA SA PCA MAINTENANCE TROUBLESHOOTING Table 4 13 Troubleshooting Guide TEST AND SYMPTOM POSSIBLE CAUSE INITIAL TURN ON Display Blank Power supply Q6 power switch interconnect microcomputer U17 Touch and Hold on Q11 O12 Q17 Power On Reset U17 pin 8 Display stuck with a constant reading Reads overload for several minutes after turn on DISPLAY TEST All segments on No drive 50 Hz squarewave TP12 U10 interconnect U17 All or no decimal points U16 U17 interconnect Decimal point in wrong location U16 range switch input to U17 1 or more digits missing 1 or more annunciator missing LINEAR VOLTAGE TEST Display reading is out of tolerance U10 16 interconnect U17 Out of calibration Constant overrange in DC V A D Check TP6 7 and 8 for proper waveforms U18 U19 U20 R2 open A D input U17 031 U22 Q7 08 Does not respond to input voltages Does not range properly in AC V dB VOLTAGE TEST Does not go into dB
7. Function switch input to U17 U17 031 022 07 O8 AC V is out of calibration Does not autorange Display reading is out of tolerance CURRENT TEST Does not respond to input currents Fuse F1 F2 Display reading is out of tolerance on 1 or more ranges R16 R17 R18 U6 U28 CR1 RESISTANCE CONDUCTANCE TEST Reading is out of tolerance on 2000 and 2 range R3 U1 check 190V dc calibration RV1 RV2 RV3 overheated from severe overload RT1 C39 PCB is contaminated see cleaning procedure in Section 4 Reading is out of tolerance on other ranges Readings are out of tolerance on high ohms Readings are noisy on all ranges Residual reading with test leads open 4 14 M M C II M ASSEMBLY NAME Final Assembly 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 1 5 4 5 2 5 5 5 2 5 9 5 3 5 12 5 13 2 ERE gt LIST 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 th
8. 2 95 To ensure that a signal measured with the 8050 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 8050 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 is shown by the following equation Crest Factor Capability Range Input The error caused 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 97 It is sometimes necessary to measure 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 and 2 to determine the total rms value of the signal Total RMS Value ac component rms
9. 3 8 4 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 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 converter cycle resulting from three different input signals Assume in reading the following paragraphs that the DC V function and the 2 range are selected and the DMM is nearing the end of the Autozero period in its conversion cycle 3 10 As Part A in Figure 3 2 shows the CMOS switches U18B 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 UI9B 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 Autoz
10. 4 34 Linear Voltage Test 4 6 4 36 dB Voltage secs xu ctae ce e 4 6 4 38 Current 4 7 4 40 Resistance and Conductance Tests 4 7 442 CALIBRATION ADJUSTMENTS 4 8 4 44 DC Calibration cui erra e a tq 4 8 4 46 AC Calibration u a 4 8 4 48 Jumper 4 8 4 57 TROUBLESHOOTING 4 12 LIST REPLACEABLE PARTS 5 1 TABLE OF CONTENTS 5 1 5 1 INTRODUCTION 25 Y aere 5 2 5 3 PARTS ORDERING INFORMATION 5 2 OPTIONS AND ACCESSORIES 6 1 TABLE OF CONTENTS 6 1 INTRODUCTION 6 2 ACCESSORIES iio a ao oie 600 1 OPTIONS iii a i 601 1 SCHEMATIC DIAGRAMS 7 1 TABLE OF CONTENTS 7 1 APPENDIX A is te a a ken pen VE IPC Ie 1 ii 4 11 4 13 List of Tables TITLE PAGE 8050A Accessories 1 2 8050A Specifications
11. Backup fuse F2 is used to clear open voltages between 250V and 600V Table 3 1 AC Buffer Gains FIRST SECOND OVERALL BUFFER BUFFER GAIN 200 mV Auto range only X1 X10 X100 dB only 200 mV X10 Linear 2V 20V 200V 750V X1 TE gt O A THEORY OPERATION TRUE RMS CONVERTER GIVEN Vrms V Vi Where Vi is the instantaneous ac voltage THEN Vrms antilog log vi antilog 2 log Vi log V Vrms rms SIGNAL 10 A D CONVERTER CIRCUIT ANTILOG LOG CONVERTER CONVERTER Q FROM MICROCOMPUTER Figure 3 6 RMS Converter 3 9 3 10 duoc pei uet Ak E A ip wer EGET DM Dirt ti pip e eec 5 AU po Cp er M REY static awareness A Message From John Fluke Mfg Co Inc Some semiconductors and custom 1C s can be damaged by electrostatic discharge during handling This notice explains how you can minimize the chances of destroying such devices s Die 1 Knowing that there is problem 2 Learning the guidelines for handling them 3 Using the procedures and packaging and bench techniques that are recommended The Static Sensitive S S devices identifiedin the Fluke technical manual parts list with the symbol The following practices should be followed to minimize damage to S S devices 1 MINIMIZE HANDLING 3 DISCHARGE PERSONAL STATIC BEFORE HANDLING DEVICES
12. Range C F Accuracy Sensitivity Resolution Voltage Standoff 801 600 CURRENT TRANSFORMER Accuracy Frequency Response Division Ratio Working Voltage Insulation Dielectric Withstand Voltage Maximum Conductor Size 80J 10 CURRENT SHUNT Accuracy 18 C to 289 DC TO 10 KHZ 10 2 100 KHZ Temperature Coefficient Inductance Overload Connects to Connectors 80K 6 HIGH VOLTAGE PROBE Voltage Range Input Impedance Division Ratio Accuracy DC TO 500 HZ 80K 40 HIGH VOLTAGE PROBE Voltage Range Input Resistance Division Ratio Accuracy Dc overall UPPER LIMIT LOWER LIMIT Accuracy Ac Overall 600 6 50 C to 150 C 58 F to 3029 F 1 1 8 F from 0 to 100 C decreasing linearly to 3 C 5 4 F at 50 C and 150 C 1 mV dc C or F 0 1 or 0 1 F recommended maximum 350V dc or peak ac internal disposable battery 1 000 hours of continuous use 1 to 600A ac 30 Hz to 1 kHz 10 kHz typical 750V rms maximum 5kV 2 inch diameter 10 amps at 100 mV 0 25 Rising to 1 dB at 100 kHz typical 0 005 C 8 3 nH in series w 0 01Q shunt Up to one minute at 204 with a 1 4 duty cycle for recovery after currents between 10A and 20A 3 4 inch center banana jacks 5 way binding posts red and black 0 to 6 kV dc or peak ac 75 MQ nominal Output reading falls Typically 30 at 10 kHz 1 kV to 40 kV dc or peak ac 28 kV rms ac 20 kV to 30 kV
13. Texas Instruments Inc Semiconductor Components Div Dallas Texas RCA Corp Solid State Div Somerville New Jersey Motorola Semiconductor Products inc Phoenix Arizona Fairchild Semiconductor Div of Fairchild Camera amp instrument Corp Mountain View 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 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 Mfg Div of McGray Edison Co Saint Louis Missouri Electro Motive Mfg Co Wiltiamantic Connecticut Erie Tech Products Inc Erie Pennsylvania Amperex Electronic Corp Hicksvilie New York Federal Screw Products Inc Chicago Illinois Shakeproot Div of illinois Tool Works Elgin Illinois Mepco Div of Sessions Ciock Co Morristown New Jersey Varo Inc Garland Texas Associated Spring Barnes Group Inc Gardena California Fluke John Mfg Inc Seattle Washi
14. 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 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 signallevel 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 Theoutput 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 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 Vrms VVB where Vi is the instantaneous voltage at any given pointin time and Vi is the average of Vi The rms converter in your 8050A monitors the instantan
15. 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 20 10002 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 1 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 1 microsecond will produce a display reading that is approximately 1 low and proportionally lower for higher frequency square waves 2 102 MEASURING AMPLIFIER BANDWIDTH 2 103 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 Onthe 80504 select the AC V function and range appropriate for the output of the amplifier 3 Adjust the signal genera
16. 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 MAINTENANCE LINEAR VOLTAGE TEST 4 34 Linear Voltage Test 4 35 Use the following procedure to verify the proper operation of the ac and dc voltage measurement functions 4 6 1 UUT SWITCH STEP POSITIONS VUT INEST FREQUENCY Connect the DMM Calibrator to the 8050A as follows HI to the V kO S input connector and LO to the COMMON input connector For each step in Table 4 4 select the switch positions shown and 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 4 36 dB Voltage Test 4 37 Use the following procedure to verify the proper operation of the dB voltage measurement function l Complete the Linear Voltage Test Select the AC dB function 200mV range Connect the DMM Calibrator to the 8050A as follows HI to the V kO S input connector and LO to the COMMON input connector 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 Table 4 4 Linear Voltage Test AC DC RANGE LEVEL 190 mV dc DC 190 mV dc 1 9
17. dc component 2 17 V OR TTE VOLTAGE CURRENT MEASUREMENT _ PEAKVOLTAGES VOLTAGES DISPLAY READINGS AC COUPLED AC COMPONENT ONLY VERO PEAK to COMPONENT 0 WAVEFORM RMS CAL 8050A ONLY i qu RECTIFIED SINE FULL WAVE PK Y 1 414 0 436 0 4 RECTIFIED SINE HALF WAVE 2 000 2 000 0 771 i B Bl RECTIFIED SQUARE PK PK 1 414 1 414 0 707 RECTANGULAR PULSE PK Y 0 2 000 gt Y ke TRIANGLE SAWTOOTH PK 3464 1 732 Ay PK PK WES 28 RMSCAL IS THE DISPLAYED VALUE FOR AVERAGE RESPONDING METERS THAT ARE CALIBRATED TO DISPLAY RMS FOR SINE WAVES Figure 2 14 Waveform Comparisons 2 18 DC AND 46 TOTAL 5 TRUE RMS Vac de dc2 A CREST FACTOR SQUARE WAVE SINE WAVE TRIANGLE SAWTOOTH ay nu MED cis fc 1 414 2 0 SCR 1 414 to 3 0 OF 100 10 WHITE NOISE 3 0 to 4 0 AC COUPLED a PULSE TRAIN T Tl 3 0 b a 1 Figure 2 15 Crest Factor AC COMPONENT LEVEL Figure 2 16 Total Value 2 98 Affects of Offset in AC Measurements 2 99 The 8050 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
18. e Long term calibration stability 1 year 1 3 The 8050A 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 istypically 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 are given in Section 6 of this manual INTRODUCTION SPECIFICATIONS Table 1 1 8050A Accessories MODEL DESCRIPTION MODEL DESCRIPTION C86 Ruggedized Carrying Case Current Shunt Y8205 Soft Carrying Case High Voltage Probe 00 200 611 Offset Mounting Kit High Voltage Probe 00 200 612 Center Mounting RF Probe M00 200 613 Dual Mounting Kit RF Probe 80T H Touch Hold Probe DC AC Current Probe 80 150 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 80
19. 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 1 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 naa O T NS PIN TIP NEEDLE POINT TEST LEAD SETS TOUCH HOLD PROBE ACCESSORIES PROBE ACCESSORIES BOT 150C and 80T 150F E TEMPERATURE PROBES HIGH FREQUENCY PROBES CURRENT MEASUREMENT DEVICES Figure 600 5 Probe Accessories 80K 40 600 5 ACCESSORIES PROBE ACCESSORIES Table 600 1 Probe Accessories Specifications 80T H TOUCH HOLD PROBE Voltage Ratings TIP TO COMMON COMMON TO GROUND Input Capacitance Lead Resistance 1000V dc or peak ac maximum 60V dc or 42V peak ac maximum 150 pF maximum 0 50 maximum 80T 150C AND 80T 150F TEMPERATURE PROBES
20. 2 calibrated at 25 kV Changes linearly from 2 at 30 kV to 4 at 40 kV Changes linearly from 2 at 20 kV to 4 at 1 kV 5 at 60 Hz ACCESSORIES PROBE ACCESSORIES Table 600 1 Probe Accessories Specifications cont 83RF HIGH FREQUENCY PROBE AC to DC Ratio 1 1 Ratio Accuracy at 1 MHz and loaded with 10 1 dB BELOW UNV Laser ana 1 5 dB Frequency Response Relative to 1 MHz 100 kHz to 100 MHz 1 dB Extended Frequency Response Useful for relative readings from 20 kHz to 250 MHz Response Responds to the peak value of an input and is calibrated to read rms value of a sine wave Voltage Range 0 25 to 30V rms Maximum Input Voltage 30V rms 200V dc Input Capacitance Approximately 3 pF Temperature Range OPERATING 10 C to 35 STORAGE Sela 40 C to 75 C Humidity lt 90 Output Connector Fits standard 0 75 inch dual banana connectors ACCO8SOLy e re e ha nes BNC to Probe Adapter P N 574756 85RF HIGH FREQUENCY PROBE AC to DC Ratio 11 Ratio Accuracy At 1 MHz and loaded with 10 MQ ABOVE 0 5V 0 5 dB BELOW 0 5 1 0 dB Fr
21. ELECTRICITY 8050A 01 Figure 601 1 8050A 01 Final Assembly cont 8 Table 601 3 1 Main PCB Assembly DESCRIPTION MAIN ASSEMBLY FIGURE 601 2 8050A 4011AAI DIODE FED VAR 1 5 0 25 20004 1 5 0 25 2000 MICA 120 5 5009 MICA 120 5 500V 5 POLYPROP 10 UF 10 100V POLYEST 1 0 UF 10 100 TA 10 UF 20 15V POLYPROP 22 UF 10 100 POLYESTER 022 UF 10 10004 MYLAR 047 UF 10 250 ELECT 470 UF 10 75 16V ELECT 470 UF 10 75 16 10 UF 20 15V TA 22 UF 201 159 ELECT 2 2 UF 20 SOV ELECT 220 UF 10 75 16V ELECT 470 UF 10 754 16V ELECT 2200 UF 10 73 16 GE 1000 PF 20 100U CER 1000 PF 20 1004 2 2 UF 20 204 POLYPROP 047 UF 10 100U MICA 180 5 500 MICA 68 PF 5 500 MYLAR 047 UF 10 250V CERAMIC 1000 10 5007 TA 10 UF 20 15V ELECT 47 10 751 eg oU 1000 PF 10 500 CERAMIC 1000 PF 10 500 CER 025 UF 20 1000 ELECT 47 UF 20 10V ELECT 47 UF 20 100 MICA 330 PF 5 500V ELECT 10 UF 20 16V 10 UF 20 15V 1000 PF 20 100V ELECT 10 UF 20 16V CURRENT R EGULATOR DIODE SI RECTIFIER 2 AP 50 VOLT DIODE SI LO CAP LO LEAK 10 RECTIFIER DIODE SI HI SPEED SWITCHING DIODE SI LO CA
22. 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 5 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 1 An open transistor will produce a display reading of 0 0005 or less TEST FIXTURE P1 COMMON AND PLUG INTO V KQ nS INPUT ICEs TERMINALS CONSTRUCTION 1 TOGGLE SWITCH DETAIL SPDT J1 TRANSISTOR SOCKET R1 750 5 1 4W 3 16 TRANSISTOR SOCKET WIRE TO BASE CONTACT OF 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 SP VERTI papaq TRES EV OPERATION RELATIVE MEASUREMENT 2 Ashorted transistor will produce an overrange indication on the display 2 76 Transistor Leakage Test 2 77 Usethe 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 indicates a faulty transistor silicon 2 78 Transistor Beta Test 2 79 Use the following proced
23. LINE VOLTAGE 90 264V 47 440 Hz field changeable STANDARDS 1EC 348 Protection Class 1 when operated from supply mains Protection Class 2 when operated from internal batteries 601 1 xm Petr cce ug a ead a i OPTIONS RECHARGEABLE BATTERY 01 OPTION 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 1 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 input 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 T
24. Position of decimal point dependent on range selected 8050A OVERRANGE INDICATION This display will appear if the switches of the 8050A are set in an improper configuration e g DC V 20 8050A IMPROPER SWITCH SETTING Figure 2 2 Liquid Crystal Display OPERATION AC DC VOLTAGE Table 2 2 Maximum Input Signal Limits FUNCTION RANGE INPUT MAXIMUM INPUT SELECTED SELECTED TERMINALS OVERLOAD ALL RANGES 1000V dc or peak ac V VIK9 S or 20V 200V 750V and 750V rms continous or 10 V Hz dB AC COMMON 2V 200 mV 750V rms for no longer than 15 seconds or 10 V Hz DC 3 m ALL RANGES mA and COMMON Double fuse protected 2A 250V fuse in series with a 600V fuse V kQ S and COMMON 500V dc or ac rms VOLTAGE LINEAR V 1 SELECT RANGE 2 SELECT FUNCTION 2000 2 20 0 2000 OMO RELATIVE ON 220 Figure 2 3 AC DC Voltage Operation 2 5 OPERATION AC DC VOLTAGE CURRENT mA 1 SELECT RANGE 2 SELECT FUNCTION 200 mV 2 gu 20015 m RELATIVE ON OFF 3 CONNECT TEST LEADS 4 BREAKCIRCUIT 5 PLACE 8050A m SERIES Figure 2 4 AC DC Current Operation 2 6 OPERATION RELATIVE 2 26 Resistance 2 27 Figure 2 5 describes how to operate the 8050A for resistance measurements When 15 selected erroneous measurements can occur if power is present in the resistance being measured
25. 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 countisagain proportional to the ratio Vex _ UNKNOWN V 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 1 0 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 4 converter and the gain ofthe ac buffers in accordance with the measurement function and range selected The microcomputer measures the output of the a d converter by accumulating counts In any measurement function the count accumulates linearly count pulses evenly spaced The total count is numerically the same as 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
26. SELECT DIGITAL COMMON 97 SENSE COMMON ANALOG COMMON SCHEMATIC DIAGRAMS CAUTION SUBJECT TO DAMAGE STATIC ELECTRICITY HV REL yes s gt Se 4 9 Bo UNE SUPPLY BATTERY SUPPLY FOR LINE VERSION COMPONENT LOCATIONS SEE FIGURE 5 2 7 2 FOR 01 BATTERY OPTION COMPONENT LOCATIONS SEE FIGURE 601 2 OR 7 4 SWITCHES ARE SHOWN IN THEIR RELAXED OUT POSITION 8050A 1001 1012 Figure 7 3 1 Main PCB Assembly Schematic 7 4 SUBJECT TO DAMAGE BY STATIC ELECTRICITY 6 CAUTION bas wi RED lt TE 4 Es Es 57 ANALOG SENSE GROUND X7 ANALOG SIGNAL GROUND POWER SUPPLY DIGITAL GROUND SCHEMATIC DIAGRAMS SEE eT 6090000000 8050A 1001 SWITCH VIEWED 2 FROM THE TOP 92 Figure 7 3 1 Main PCB Assembly Schematic cont 7 5 CAUTION SUBJECT TO DAMAGE BY STATIC ELECTRICITY SCHEMATIC DIAGRAMS FOR SCHEMATIC DIAGRAM SEE FIGURE 7 3 Figure 7 4 A1 Maln PCB Assembly Battery Option 01 7 6 8050A 1611
27. Science Korea Co C P O Box 8446 Room 201 Boondo Bldg 56 12 Gangchung 1 Ka Gung Ku Seoul Korea Tel 261 7702 Malaysia Rank O Connor s Malaysia SDN BHD P O Box 91 Petaling Jaya Selangor West Malaysia Tel 566599 Mexico Christensen S A Guillermo Prieto 76 304 Col San Rafael Delegacion Cuahutemoc 06470 Mexico D F Tet 546 25 95 Netherlands Fluke Nederland B V Zonnebaan 39 3606 CH Maarssen Netherlands P O Box 225 3600 AE Maarssen The Netherlands 030 436514 New Zealand McLean information Technology Ltd P O Box 18065 Glen Innes Auckland 6 New Zealand Tel 587 037 Norway Morgenstierne amp Co A S Konghellegate 3 P O Box 6688 Rodelokka Oslo 5 Norway Tel 09 47 2 356110 Pakistan Pak International Operations 505 Muhammadi House 14 Chundrigar Road P O Box 5323 Karachi 2 Pakistan Tei 221127 239052 Peru Importaciones Y Representaciones Electronicas S A Avda Franklin D Roosevelt 105 Lima 1 Peru Tel 288650 Phillipines Spark Radio and Electronics Corp P O Box 610 Greenhills Metro Manila Philippines 3113 Tel 78 78 16 Portugal Equipamentos de Laboratorio Ltda P O Box 1128 Lisbon 1000 Portugal Tel 09 351 19 574984 Republic of Singapore Rank O Connor s PTE Ltd 98 Pasir Panjang Road Singapore 0511 Republic of Singapore Tel 637944 Republic of South Africa Fluke S A Pty Ltd P O Box 39797 Bramley 2
28. 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 15 000 15 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 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 1 DE ENERGIZE CIRCUIT TO BE MEASURED 2 SELECT Range 2 range preferred 3 SELECT FUNCTION 4 CONNECT TEST LEADS HIGH LOW __ FORWARD BIAS REVERSE BIAS Figure 2 7 Diode Test Operation IT SI OPERATION RELATIVE RELATIVE RELATIVE 1 Select range and function use any measurement range and function UL AAA 200 2 2007 Ge 0 2 200 20 0 2 aaa dB MAX Connect test leads and take the desired measurement to be
29. at full scale at 20 Hz RESOLUTION 0 01 dB from 5 of scale to fuli scale 0 1 dB from 1 5 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 CREST FACTOR RANGE Waveforms with a Peak RMS ratio of 1 1 to 3 1 at full scale increasing down range INPUT IMPEDANCE 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 2 seconds maximum within a range REFERENCE IMPEDANCES Sixteen user selectable impedance reference levels are provided to reference a 0 dBm 1 mW level 500 750 930 1100 1250 1850 1500 2500 3000 5000 6000 8000 9000 10000 12000 and an 80 impedance reference level is provided to reference 80 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 5 of range to full scale 1 year VOLTAGE 600 REF RANGE 20Hz 45Hz kHz 10kHz 20 kHz 50 kHz 0 77 2 60 to 52 200 0 5 dBm 2 mV 2 52 to 8 200 0 1V 2V 18 to 48 2V 1V 20V 2 to 28 20V 0 25 dBm 0 15 dBm 0 25 dBm 1
30. 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 refer to the information on cleaning pcb s given later in this section 4 1 Tis MAINTENANCE ACCESS PROCEDURES INSTRUMENT TYPE DMM Calibrator Table 4 1 Required Test Equipment REQUIRED CHARACTERISTICS DC Voltage 0 to 1000V 3 00695 AC Voltage 100 Hz 750V 1 06 200 Hz 0 to 2V 2 06 1 kHz O 750V 06 10 kHz 100V 5 0696 20 kHz 0 to 100V 1 50 kHz 20V 1 5 DC Current 0 to 2000 mA 2 03596 AC Current 19 mA 100 Hz 1 Resistance 1002 1 01 10 100 3 00596 1 10 05 1 mV resolution 24 Shielded cable with a double banana plu
31. 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 1 Select the function 2000 range 2 Verify that the overrange indicator 1 is displayed 3 Connect the red test lead to the 5 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 20 200 2000 20 Due to test lead resistance the least significant digit s 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 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 10 Setthe DMM Calibrator for a 39V dc output 11 Verify that the HV annunciator disappears and the polarity indicator changes to negative 12 Select the dB function on the 8050A then set the RELATIVE switch to ON in 13
32. 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 TEP INP 200 uA 190 uA 189 41 to 190 59 2 mA 1 8 1 8941 1 9059 20 mA 19 18 941 19 059 200 mA 190 189 41 to 190 59 2000 mA 1900 mA 1894 1 1905 9 4 40 Resistance and Conductance Tests 441 Use the following procedure to verify the proper operation of the resistance and conductance measurement functions 1 Select the fun
33. used as the relative reference While taking the relative reference measurement set the RELATIVE switch to ON This wil store the value as the relative reference Measuring the relative reference Subsequent measurements will be displayed as the difference between the relative reference and measurement See insert Storing the relative reference m e REL A bsequent measurement of 1 9 de 4000 IF 4 cancel the relative function set the RELATIVE switch to OUT Figure 2 8 Relative Operation v Ed OPERATION DECIBEL 2 36 Decibel dB 2 37 Figure 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 CONNECT TEST LEADS Figure 2 9 d
34. 0 2 This subsection describes the basic use of the accessories available for your 8050 For more detailed information refer to the instruction sheet included with each accessory When ordering an accessory include its model name and number 600 3 SOFT CARRYING CASE Y8205 600 4 The Model 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 Model C86 Ruggedized Carrying Case shown in Figure 600 2 is molded polyethylene carrying case designed to provide maximum protection 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 Model 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 paragra
35. 000 00000000 00000000 00000000 0 0 DISPLAY REV lb ke Figure 4 1 Display PCB Access o 00000000 900000000 00000000 00000000 00000000 00000000 000000000 9 0 4 3 De as 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 1 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 600V fuse mfg part no BBS 3 4 21 ACLINE 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 Rechargeable 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 c
36. 000000 000000000 e o 8 000000009 IMPEDANCE SELECTING DIODES Figure 4 2 Calibration Adjustment Locations eM T MAINTENANCE CALIBRATION ADJUSTMENTS Table 4 8 DC Calibration VOLTAGE E 200 mV 200 V 1000V dc R11 can not be adjusted to the DISPLAY LIMIT refer to the 5 jumper selection procedures in Section 4 of this manual 2V DISPLAY LIMITS 1 9000 exactly gt gt 190 00 exactly 190 00 exactly 1000 0 exactly Table 4 9 AC Calibration VOLTAGE ADJUST DISPLAY LIMITS LEVEL 1 9000V 1 8995 to 1 9005 gt 100 0 0999 to 1001 gt gt R7 and R29 are interacting adjustments Repeat until both are within their limits 2V Short circuit Less than 40 digits gt 20V 19 000V 10 kHz 61 18 990 19 010 200V 100 00V 10 kHz c2 99 95 to 100 05 C1 and C2 are interacting adjustments Repeat until both are within their limits Use an insulated screwdriver for these adjustments gt If R7 cannot be adjusted the DISPLAY LIMITS refer to the U33 jumper selecter procedure in Section 4 of this manual 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 Calibra
37. 018 Republic of South Africa Tel 011 786 3170 Spain Hispano Electronics S A Apartado de Correos 48 Alcorcon Madrid Spain Tel 09 34 1 6194108 Sweden Teleinstrument AB P O Box 4490 S 162 04 Vallingby 4 Sweden Tet 09 46 8 380370 Switzerland Traco Electronic AG Jenatschstrasse 1 8002 Zurich Switzerland Tel 09 41 1 2010711 John Fluke Mfg Co Box C9090 Everett WA 98206 Phone 206 342 6300 FLUKE ue Holland B V 5053 5004 EB Tilburg The Netherlands Phone 013 673973 5 13 5 14 9 Litho in U S A 12 81 Section 6 Options and Accessories TABLE OF CONTENTS OPTION DESCRIPTION PAGE MODEL NUMBER ACCESSORIES Y8205 Soft Carrying Case Aiea aUe a ea 600 1 86 Ruggedized Carrying Case 600 1 00 200 611 Offset Mounting Kit 600 2 M00 200 612 Center Mounting Kit 600 2 00 200 613 Dual Mounting Kit 600 3 80 Touch Hold Probe 600 4 80 150 Temperature Probe C 600 5 80T 150F Temperature Probe CF 600 5 801 600 Current Transformer 600 5 80J 10 Current Shunt cocoa v rere rhy er ES UU Das 600 5 80K
38. 0V 200V 22 to 48 200V 100V 750V 42 to 60 750V 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 ACCURACY for 1 Year BURDEN VOLTAGE 200 0 01 yA 0 3 of reading 2 digits 0 3V max OVERLOAD PROTECTION ac dc 2A 250V fuse in series with 3A 600V fuse for high energy sources AC Current True RMS Responding AC Coupled INPUT x BURDEN CURRENT RESOLUTION RANGE 20Hz 45Hz 2kHz 10kHz 20kHz VOLTAGE 10 4A 200 yA 200 uA 100 uA 2 mA 2 mA 1 20 mA 20mA 2 10 2 10 0 3V rms max 10 mA 200 mA 200 mA 100 mA 2000 mA 2000 mA Typically 3 to 5 digits of rattle will be observed at full scale at 20 Hz CREST FACTOR RANGE Waveforms with a Peak RMS ratio of 1 1 to 3 1 at full scale _ Resistance FULL SCALE VOLTAGE ACROSS RANGE RESOLUTION ACCURACY for 1 Year UNKNOWN RESISTANCE 2000 0010 0 1 reading 2 digits 02Q 010 10 2 2V 0 25 reading 3 digits OVERLOAD 500V dc ac rms on all ranges OPEN CIRCUIT VOLTAGE Less than 3 5V on all ranges RESPONSE TIME 10 seconds maximum on 20 range 2 seconds maximum on all TO RATED ACCURACY other ranges DIODE TEST These three ranges have enough voltage to turn on silicon junctions E to check for proper forward to back resistance The 2 range is
39. 1 8564 B C Burnaby Altan Crawford Assoc Ltd 3795 William St Burnaby B C V5C 3H3 604 294 1326 Other Areas Argentina Coasin S A Virrey del Pino 4071 Buenos Aires Argentina Tel 522 5248 Australia Elmeasco instruments Pty Ltd 0 Box 30 Concord N S W Australia 2137 Tel 02 736 2888 Australia Eimeasco Instruments Pty Ltd P O Box 107 Mr Waverly VIC 3149 Australia Tel 03 2334044 Australia Elmeasco Instruments Pty Ltd GPO Box 2360 Brisbane Queensland 4001 Australia Tel 07 229 3161 Austria Walter Rekirsch Elektronische Gerate GmbH amp Co Vertriebs KG Obachgasse 28 A 1220 Vienna Austria Tel 0222 235555 Belgium Fluke Belgium 5 6 Rue de Geneve 1140 Brussels Belgium Tel 09 32 2 2164090 Brazil Fluke Brasil Industria e Comercio Ltda Al Amazonas 422 Alphaville Barueri CEP 06400 Sao Paulo Brazil Tel 011 421 3603 Chile Intronica Chile Ltda Casilla 16228 Santiago 9 Chile Tel 44940 China Peoples Republic of Beijing Radio Research Institute Dianmen East Avenue 89 Beijing China Tel 445612 Colombia Sistemas E Instrumentacion Ltda Carrera 13 No 37 43 Of 401 Ap Aero 29583 Bogota DE Colombia S A Tel 232 45 32 Denmark Tage Olson A S Ballerup Byvej 222 DK 2750 Ballerup Denmark Tet 09 45 2 658111 Ecuador Proteco Coasin Cia Ltda Edificia Jerico Ave 12 de Octubre 2285 y Ave Orellan
40. 2 5 4 3 2 2 1 1 1 1 4 1 1 1 1 1 FUSEHOLDER FOR SEPARATE ORDER TO ORDER COMPLETE ASSEMBLY SEE MP9 P M DECAL DISC HANDLE PANEL FRONT RECEPTACLE AC RETAIMER FLEX SHIELD INSULATOR SHIELD MAIN SHIELD INSULATOR DECAL FRONT PANEL CASE EXTERIOR PLASTIC HANDLE MOLDED DECAL SPECIFICATION pr Ph TEST LEAD W PROSE 78132 LABEL Caution PAD BATTERY ABSORBANT RETAINER BATTERY GROPPET USED IN SHIPMENT DECAL FACTORY MUTUAL JUMPER ASSY FOR JUMPER ASSY FOR 033 BOX UNIT SHIPMENT BOX LINER LINE CORD INSTRUCTION MANUAL RECOMMENDED SPARE PARTS K RIT 80504 Re 601 3 OPTIONS RECHARGEABLE BATTERY 01 OPTION CAUTION SUBJECT T0 DANAGE BY STATIC ELECTRICITY 601 4 Figure 601 1 8050A 01 Final Assembly 8050 01 OPTIONS RECHARGEABLE BATTERY 01 OPTION MP1 MP2 MP7 LCD1 Bezel Section H4 MP3 MP6 QOO p p MP4 MP8 MP5 FRONT VIEW NS MP18 MP12 BT1 BT2 MP11 MP 19 MP28 SIDE VIEW 8050A 4011 Figure 601 1 8050A 01 Final Assembly cont 601 5 en ane A II zip OPTIONS RECHARGEABLE BATTERY 01 OPTION BEZEL SECTION 601 6 11 H5 3 H3 4 1 DISPLAY BOARD CAUTION SUBJECT TO DAMAGE BY STATIC
41. 2E CR251 4 5P9E1 EB1001 CR251 4 5P1K 485052 CR251 4 5p470K 4711 CR251 4 5P1n CR251 4 5P1n CF 55590 2F CR251 4 5P15K 84755 CR251 4 5P15K CrF552323 CR251 4 5P680E CR251 4 5p27K CR251 4 5p730K CR251 4 5P100E 84755 CR251 4 5P470K CR251 4 SP1E 180910200 7 98 9 88 1 1 1 1 1 1 1 1 1 1 4 2 1 1 1 1 1 1 2 4 1 1 1 1 1 1 1 8 NN 8 8 9 8 8 A Table 601 3 1 Main PCB Assembly cont MFG DESCRIPTION SPLY MFG PART CODE BATTERY MODEL DC DC BATTERY MODEL TERMINAL PINS RESISTOR NETWORK SHUNT DUAL COMPENSATED 8 DIP COMPENSATED 8 DIP LOW POWER DUAL VOLTAGE COMPARATOR C MOS LISUID CRYSTAL 4 SEGMENT LIGUID CRYSTAL 4 SEGMENT LIGUID CRYSTAL DSPLY DRIVERS LISUID CRYSTAL DSPLY DRIUERS LIGUID CRYSTAL DSPLY DRIVERS LIQUID CRYSTAL DSPLY ORIUERS 9 LIGUID CRYSTAL 4 SEGMENT OPERATIONAL AMP 80506 4504 MOS QUAD BILATERAL SWITCH 14 PIN 80506 4504 K RECTIFIER BRIDGE RECTIFIER BRIDGE 1 DUAL VOLTAGE COPPARATOR LIT393N CONVERTER 510685 513564 519728 387217 5 6V 5Z SELECT 535559 RED 537157 BLK 537167 WIRE ASSEMBLY WHT 487096 WIRE ASSETBLY BLK 487104 489120 YEL 487112 SOCKET 429282 DIL840P 108 SOCKET 14 PIM DILBSP 108 CRYSTAL 4 MHZ 474072 Plea
42. 44 COMP 4 703 5 1 4M VAR 10 DEP CAR 27 DEP CAR DEP CAR 1M 51 1 44 DEP CAR 15K 5 1 44 1 48 DEP CAR 680 5 1 4 CAR 27K 5 1 4 CAR DEP 1 5 1 44 470K 5 1 44 CAR DEP 4 5 1 40 THERMISTOR VARISTOR VARISTOR VARISTOR SWITCH ASSEMBLY SWITCH SWITCH TRANSFORMER POWER TERMINAL PINS RESISTOR NETWORK RESISTOR NETWORK RESISTOR NETWORK RESISTOR NETWORK RESISTOR NETWORK IC RES 2 RESISTOR SHUNT IC DUAL COMPENSATED 8 PIN DIP IC DUAL COMPENSATED 8 PIN DIP MFG SPLY MFG PART NO 474080 514265 529099 513259 474773 755901 285056 285056 282265 CR251 4 5P100E CR251 4 5P100E CB4755 485052 CR251 4 5p470K CR251 4 5P1H CR251 4 5p1n CR251 4 5P15K 4755 CR251 4 5P 15K Q 552323 CR251 4 5p15K CR251 4 5p27K 146415 4755 CR251 4 5p1n CR251 4 5p470K 473736 APPROPRIATE VOLTAGE 512737 513283 513271 512939 pe Am 98 A LIST REPLACEABLE PARTS Table 5 2 A1 Main PCB Assembly cont MFG SPLY MFG PART NO 0 DESCRIPTION LOW POWER DUAL VOLTAGE COMPARATOR C 110S LIQUID CRYSTAL 4 LIQUID CRYSTAL 4 LIGUID CRYSTAL DSPLY DRIVERS LIGUID CRYSTAL DSPLY DRIVERS LIGUID CRYST
43. 50A Specifications ELECTRICAL The electrical specifications given apply for an operating tem perature of 18 C to 28 64 4 F to 82 4 F relative humidity up to 90 and 1 year calibration cycle Functions DC volts AC volts linear and dB DC current AC current resistance diode test conductance relative DC Voltage RESOLUTION ACCURACY for 1 Year 1200 mV 2 20V 0 03 of reading 2 digits 200V 1000V 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 gt 90 dB at dc 50 Hz or 60 Hz 1 unbalanced 7120 dB available on request COMMON MODE VOLTAGE MAXIMUM 500V dc or peak RESPONSE TIME TO 1 second maximum RATED ACCURACY MAXIMUM INPUT 1000V dc or peak ac continuous less than 10 seconds duration on both the 200 mV and 2V ranges 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 full range INPUT VOLTAGE RESOLUTION RANGE 20Hz 45 Hz 1kHz 10kHz 20 kHz 50 kHz 10 mV 200 mV x 0 1V 2V 0 0 1V 20V 1 10 1 10 5 30 200V 100V 750V Typically 3 to 5 digits of rattle will be observed
44. 6 High Voltage Probe cies sc ehe 600 5 80K 40 High Voltage Probe 600 5 83RF RE Prob er eres e y say s ea wees 600 5 85RF RE Prob Sesha rare guste dies e e es 600 5 8100 DG AC Current Probe vel ales je VE 600 5 8101 AC Current Transformer 600 5 Y8134 Deluxe Text Lead Kit safety designed 600 5 Y8140 Slim Flex Test Leads 600 5 OPTIONS 0 Rechargeable Ni Cad Battery Option 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 subsections 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 er ee RI A A PP 600 1 INTRODUCTION 60
45. 8 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 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 relationships of the major circuits Second the Circuit Description presents a more detailed discussion of the major circuits Both levels are illustrated by block diagrams and simplified schematics in thissection and the schematic diagrams in Section 7 3 3 FUNCTIONAL DESCRIPTION 34 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 the a d 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
46. 8050 Digital Multimeter Instruction Manual P N 530907 FL J K 1979 2 7 84 91984 John Fluke Mfg Inc rights re Litho in U S A WARRANTY Notwithstanding any provision of any agreement the following warranty is exclusive The JOHN FLUKE MFG CO INC warrants each instrument it manufactures to be free from defects in material and workmanship under normal use and service for the period of 1 year from date of purchase This warranty extends only to the original purchaser This warranty shall not apply to fuses disposable batteries rechargeable type batteries are warranted for 90 days or any product or parts which have been subject to misuse neglect accident or abnormal conditions of operations In the event of failure of a product covered by this warranty John Fluke Mfg Co Inc will repair and calibrate an instrument returned to an authorized Service Facility within 1 year of the original purchase provided the warrantor s examination discloses to its satisfaction that the product was defective The warrantor may at its option replace the product in lieu of repair With regard to any instrument returned within 1 year of the original purchase said repairs or replacement will be made without charge If the failure has been caused by misuse neglect accident or abnormal conditions of operations repairs will be billed at a nominal cost In such case an estimate will be submitted be
47. AL DSPLY DRIVERS LIQUID CRYSTAL DSPLY DRIVERS LIGUID CRYSTAL 4 SEGMENT SI N CHANNEL 40 PIN 010 80506 4506 80508 4506 01 SELECTED 8050A 4506 01 OPERATIONAL AMP 80506 4504 05 QUAD BILATERAL SWITCH 14 PIN OPERATIONAL APP 80506 4504 VOLTAGE REGULATOR VOLTAGE REGULATDR RESI NETWORK RECTIFIER BRIDGE RECTIFIER BRIDGE IC LOW POWER DUAL VOLTAGE COMPARATOR HYBRID RMS TO DC CONVERTER RESISTOR NETWORK RESISTOR NETWORK DIODE ZENER WIRE ASSEMBLY RED WIRE ASSEMBLY WHT WIRE ASSEMBLY GRN YEL SOCKET IC SOCKET 14 PIN CRYSTAL 4 MHZ 1 2 3 Please be aware of voltage changes components mau not used therefore mau not be installed 510941 be used in place of P N 501080 U2 P N 510834 may be used in place of P N 512905 8 9 088 8 1 1 1 2 EF EF 1 1 1 1 1 1 1 1 1 1 1 3 1 omi co ideni 5 10 LIST REPLACEABLE PARTS s T9 TG A LL a FACTORY SMECTED PARTS BE INSTALLED CAUTION SUBJECT TO DAMAGE BY 6 STATIC ELECTRICITY 8050A 1601 Figure 5 2 8050A A1 Main PCB Assembly LIST REPLACEABLE PARTS 8050A 1601 Figure 5 2 8050 1 Main PCB Assembly cont 5 11 8050A 5 12 Tabie 5 3 Federal Supply Codes for Manufacturers Allen Bradley Co Milwaukee Wisoncsin
48. B 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 is a 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 Usethe following procedure to verify that most of the functions of the 8050A are operating correctly 1 Select the AC V 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 fluct
49. CHANNEL COMP 100K 10 14 1000 10 24 MTL FILM 1000 51 1 104 CER 100K 101 1 24 VAR 100 10 1 24 VAR CER 10 1 20 Corp 220K 10 28 VAR CER 500 10 1 24 CERMET 200 10 1 24 MTL FILM 80 6K 1 1 84 DEP 1M 5z 1 4 DEP 20 5 1 44 MTL FILM 900 0 1 1 84 MTL FILM 90 0 11 1 84 9 15 14 COMP 100K 5 24 Corp 2 22 101 1 24 COMP 22M 5 1 44 DEP CAR 100 51 COMP 4 71 5 1 4 DEP CAR 12 5 1 44 DEP CAR 9 1 5 1 44 COMP 10 10Z 1 24 DEP CAR 1K 5 1 40 VAR 1M 10 1 24 DEP 470K 5 1 4 COMP 470 10 1 29 DEP CAR 1M 5 1 4 DEP CAR 1M 5 1 44 MTL FILM 59K 1 1 24 DEP CAR 15K 5 1 44 COMP 4 78 51 1 8 DEP CAR 15 5 1 4 DEP 680 51 DEP 27K 5 1 48 DEP CAR 750K 5 1 64 DEP CAR 100 5 1 44 COMP 4 71 51 1 44 FXD 27K 5 1 44 DEP 8 2K 5 1 44 DEP 15K 5 1 44 DEP CAR 27K 5 1 40 DEP CAR 20 5 1 44 COMP 471 102 1 24 COMP 4 71 51 1 44 DEP CAR 1n 51 1 4 DEP CAR 470K 5 1 44 CAR DEP 1 5 1 4 MFG SPLY CODE MFG PART PPS6563 513259 447730 474973 7 558062 CR251 4 5P1n CR251 4 5P20E 55901 055702 461962 285056 285056 82255 CR251 4 5P100E CB4755 CR251 4 5P1
50. DC position the output of the divider network is routed directly to the a d converter If the 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 converter If the AC DC switch isin 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 ranges use a direct ratio technique Other ranges use a subtraction and ratio technique to indirectly derive a ratio SOUPE NUMEN NS UR CR NIIS l THEORY OF OPERATION SIGNAL CONDITIONING U 1 INPUT DIVIDER FUNCTION AND RANGE SWITCHES TRUE RMS CONVERTER A VOLTAGE MEASUREMENTS TO TOUCH AND HOLD CIRCUIT DC O TRUE RMS CONVERTER RANGE SWITCHES B CURRENT MEASUREMENTS OHMS VOLTAGE SOURCE A D BUFFER U7A 019 A D BUF
51. Ensure that power is removed before measuring in circuit resistances The AC DC function switch has no effect during resistance measurements 2 28 Conductance 5 1 0 2 29 Figure 2 6 describes how to operate the 8050A for conductance measurements When S 1 0 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 The three resistance ranges with the diode symbol beside the range value provide a measurement RESISTANCE 1 DE ENERGIZE CIRCUIT TO BE MEASURED 2 SELECT RANGE 3 SELECT FUNCTION 4 CONNECT TEST LEADS HIGH LOW voltage sufficient to cause a silicon junction to conduct These ranges 2 200 and 20 can be used to check silicon diodes and transistors The 2 resistance range is the preferred diode and transistor testing range and is labeled with the largest diode symbol Fora silicon diode the typical forward bias voltage on the 2 range is 0 6V A reversed bias silicon diode should display the overrange indicator on the 2 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
52. FER INT CONFIGURATION DE INTEGRATE CONFIGURATION C RESISTANCE MEASUREMENTS BUFFER OUTPUT DE INT 2002 2 VQ REF ALL OTHER VRTI 82 gt RANGES VRX R2 7 VRX t R2 Vn REF VQ REF Figure 3 5 Signal Conditioning 3 7 Lee d x 8 THEORY OF OPERATION TRUE RMS CONVERTER 3 28 As Part C of Figure 3 5 shows when the 2 mS 2000 or 2 range 15 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 Minus is necessary for de integration during the Read period 3 29 As Part C of Figure 3 5 shows when any range but 2 mS 2000 or 2 is selected the voltage drop across theunknown resistance ismeasured and C7 chargesupto the ohms voltage source VH During the Read period the a d buffer subtracts the voltage on C7 from VL thereby obtaining V ORFF 3 30 For conductance measurements the microcomputer inverts the measurements S 1 0 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
53. Figure 5 1 8050A Final Assembly cont LIST OF REPLACEABLE PARTS Table 5 2 1 Main PCB Assembly DESCRIPTION MAIN ASSEMBLY MODEL MFG PART NO pa 38 95059 R FIGURE 5 2 80506 40016 1 VAR 1 5 0 25 2000U VAR 1 5 0 25 20004 MICA 120 PF 5 500V MICA 120 PF 5 5004 MICA 1800 5 500V POLYPROP 10 UF 10 100V POLYEST 1 0 UF 10 100 10 UF 20 15V POLYPROP 22 UF 10 100V POLYESTER 022 UF 10 10009 MYLAR 047 10 2500 ELECT 70 UF 10 751 16V ELECT 470 UF 10 75 16V TA 10 UF 20 150 22 UF 20 150 ELECT 220 UF 10 75 250 ELECT 220 UF 10 75 25V ELECT 22 UF 10 75 16V ELECT 22 UF 10 75 160 1000 PF 20 100U 1000 PF 20 100V 2 2 UF 20 204 POLYPROP 047 UF 10 1009 MICA 180 PF 51 5000 MICA 68 PF 5 500U MYLAR 047 10 2500 CERAMIC 1000 PF 10 500 10 UF 201 15V CERAMIC 1000 PF 10 500V 530 000 530 000 Dn15F121J 01157121 148353 448781 196D106X0015A1 446799 KT 1822 322 10 2 501510 501510 196D106X0015A1 196D226X0015KA1 484071 484071 436840 435840 0238101 103 0238101 103 196D226X0020HA1 446773 DH15F181J 01157680 2 01681026 102 1960106001581 01681026 102 ios
54. GRAY OFFSET BUTTON SWITCH RANGE SEMBL Y TO ORDER FUSE ONLY SEE IP12 IMERI j TEONE FUSE FOR ery ORDER DISC ON HANDLE PANEL FRONT ANEL CASE EXTERIOR PLASTIC HANDLE MOLDED PLASTIC DECAL SPECIFICATION TEST LEAD W PROBE 78132 DECAL FACTORY MUTUAL JUMPER ASSY FOR US JUMPER ASSY FOR U33 80 UNIT SHIPMENT BOX LINER LINE CORD INSTRUCTION MANUAL 80508 RECOMMENDED SPARE PARTS KIT 80504 FLUKE STOCK NO 80504 510156 471027 533919 MFG SPLY MFG PART NO TOT REC CODE WY 0 LINE LIST OF REPLACEABLE PARTS MODEL AGX 2 BBS 3 19042 320051 256156 494641 178533 288266 340505 507723 507673 479642 471730 425900 510271 510164 426759 525527 hth DUAN 723155 343723 530707 533919 3 8 8 Bro rar jat jd RES ose mor LIST OF REPLACEABLE PARTS CAUTION SUBJECT TO DAMAGE BY STATIC ELECTRICITY 5 4 Figure 5 1 8050A Final Assembly 8050A 0 amp 3 LIST REPLACEABLE PARTS MP21 FRONT VIEW 1 REF 19 SIDE VIEW CAUTION SUBJECT DAMAGE BY STATIC ELECTRICITY 8050A 4001 Figure 5 1 8050A Final Assembly cont LI y AI prenne LIST REPLACEABLE PARTS CAUTION SUBJECT DAMAGE BY STATIC ELECTRICITY Bezel Section A1 DISPLAY BOARD 5 6
55. 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 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 4 1 9999V dc Note that for positive 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 C
56. JUSTMENTS Table 4 10 US Jumper Positions DISPLAY ALL JUMPER PINS INSTALLED JUMPER CONFIGURATION AS VIEWED FROM REAR OF 8050A JUMPER INSTALLED SELECTABLE JUMPER CONFIGURATION FOR DC CALIBRATION VOLTAGE REFERENCE VR1 CALIBRATION NETWORK U5 9 Perform the Calibration Adjustments 4 54 RMS CONVERTER OFFSET ADJUSTMENT PROCEDURE 4 55 The rms converter offset adjustment should be performed if R29 does not have a sufficient adjustment range or if the 8050A display reading is greater than 0040 in step 3 of Table 4 9 Use the following procedure to set the initial offset of the RMS Converter 1 On the 8050A set the POWER switch to ON 2 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 400Hz Turn on the DMM Calibrator With the DMM measure the voltage at pin 7 of the RMS Converter with reference to ground This voltage must be 0 0V 20 mV Record this voltage to the nearest 0 1 mV If the 4 11 MAINTENANCE TROUBLESHOOTING 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 t
57. M 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 converter continues to integrate normally and OL indicator does not appear 3 16 The a d reference scheme is different if either the or S functions are selected When the 2 mS 2000 or2 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 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 7 is connected in the feedback loop of the buffer Therefore the count accumulated in the microcomputer during the Read period is proportionalto the ratio UNKNOWN V REFERENCE 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 isintegrated During the
58. NG The Display PCB is connected to the main pcb 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 Su usss pem 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 1 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 bd U 4 R11 100 voc 1 9VDC 2 R5 190 19VAC 0 1000VDC 190VDC 10 KHZ 10 KHZ 6890 0 CR10 CR11O CR7 O 00000 9 ooooooooon 00000000 200000
59. O 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 1 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 Marie RE o Friede Rip anand Gest 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 main 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 vol
60. P LO LEAK DIODE LIGHT EMITTING LED RED SPRING COMPRESSION SUPPORT HYBRID TO HEATSINK W U26 SUPPORT RESISTOR CLIP COMPONENT SPACER SPACER STANDOFF JUMPER ASSY FOR US JUMPER ASSY FOR 033 XSTR SI NPN SWAGED XSTR SI PNP FLUKE STOCK NO 193623 MFG SPLY CODE WITH 72982 72782 72136 149153 56289 614859 348177 348177 07263 89535 07263 OPTIONS RECHARGEABLE BATTERY 01 OPTION TOT REC MFG PART NO em lom N 0 BATTERY OPTION 01 i 530 000 530 000 015212 0 157121 148353 448781 C2380MAH AIM 196D106X0015A1 486799 1822 322 10 C280h E MUX 501510 501510 196D106X0015 1 1960226X0015K 1 614875 Bs En A APR TRA 501510 474981 0238101 10301 C0238101F 1038 1960226X0020HA1 446773 DFH15F181J 14115680 C2B0MAE AS7K C0168102G 102K 1760106 001541 436006 C016B102G 102K 01681026 102 C0238101H253n RA 613784 613984 Dn15F331J 614859 1760106 001501 0238101 1031 614859 TCR5290 145400 FD7223 8 9 424 88 8 9 C0240 026 0500 5 515635 3527 522243 473785 345079 516880 525154 285089 CA 05S TSD 55 109 1 04 218376 218396 329698 244250 MDB pe be 601 7 OPTIONS RECHARGEABLE BATTERY 01 OPTION Table 601 3 A1 Main PCB Assembly cont DESCRIPTION SI SI SI SI SI SI 1 FET DUAL N
61. RMS ABOVE EARTH GROUND 2 20 OPERATING 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 Table 2 1 8050A Controls Indicators and Connectors 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 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 switch and one of two pairs of Range Function switches Interlocked switches that select the measurement ranges Pushing 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 measure ment functions Test lead connector used as the high input for all voltage resistance continuity conductance and decibel measurement functions Push on push off switch Used to select the re
62. TH 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 still need to make additional measurements before recharging set the POWER switch to the OFF position for a couple of minutes then setthe POWER switch back to the ON position If the BT annunciator does notappear 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 none 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 8050 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 6W max
63. TION __ 19 999 AZ t 7 on NEGATIVE f RANGE POSITIVE FULL RANGE INPUT LOAD READ DE R POSITIVE OVER Figure 3 3 A D Converter Waveforms EXTENDED AUTOZERO THEORY OF OPERATION SIGNAL CONDITIONING CONTROL A D LOGIC CONVERTER COUNTER FUNCTION SWITCHES 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 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 is 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 is in the
64. V 2 17 To extend the life of the LCD and to ensure that the display will be ready to operate observe the following precautions Do not store or use the instrument in temperatures above or below those specified in Section 1 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 LIMITS CAUTION Exceeding the maximum signal input limits can damage the instrument 2 23 AW 2000 REED 00 X0 2000 tata sa CD e a me a Figure 2 1 Controls Indicators and Connectors 2 2 7504 0004 DC Ape terri ord 7 Display 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 POWER Switch 2 19 Before using the 8050A itis important to note the maximum input limits that may be applied to the instrument Table 2 2 lists the maximum signal input levels allowed for each function range and input connector WARNING TO AVOID ELECTRICAL SHOCK DO NOT CONNECT THE COMMON INPUT CON NECTOR TO ANY SOURCE MORE THAN 500 DC OR 500 AC
65. a Planta Baja Quito Ecuador Tel 526759 Egypt and Sudan Electronic Engineering Liaison Office 11 Ahmed Khashaba Street Hegas Square Heliopolis Cairo Egypt Tel 691588 Finiand Oy Findip AB Teollisuustie 7 02700 Kauniainen Finland Tel 09 358 0 502255 France M B Electronique S A Rue Fourny ZAC de BUC B P No 31 78530 BUC France Tel 09 33 1 9568131 Greece Hellenic Scientific Representations Ltd 11 Vrassida Street Athens 612 Greece Tel 09 30 1 711140 Hong Kong Schmidt amp Co H K Ltd 28th FI Wing On Centre 111 Connaught Road Central Hong Kong Tel 5 455644 india Hinditron Services Pvt Ltd Field Service Centre 8th Main Road 33 44 A Raj Mahal Vilas Extn Bangalore 560 080 India Tel 33139 India Hinditron Services Pvt Ltd 69 A L Jagmohandas Marg Bombay 400 006 India Tel 811316 India Hinditron Services Pvt Ltd 15 Community Centre Panchshila Park New Delhi India 110 017 Tel 619118 Israel R D T Electronics Engineering Ltd P O Box 75 46 Sokolov Street Ramat Hasharon 47235 Israel Tel 09 972 3 483211 italy Sistrel S p A Via Pelizza da Volpedo 59 20092 Cinisello Besamo Milan Italy Tel 2 6181893 Italy Sistrel S p A Via Giuseppe Armellini No 37 00143 Rome italy Tel 09 39 6 5915551 Japan John Fluke Mfg Co Inc Japan Branch 1 Higashikata machi Midori ku Yokohama 226 Japan Tet 045 473 5428 Korea Electro
66. adjust the indicated component to the display limits 4 This completes the AC Calibration procedure Remove power from the DMM Calibrator before dismantling the test setup 4 48 Jumper Selection 449 If the calibration adjustments do not bring the instrument within specifications or if certain critical components VR 1 or 032 have been replaced complete one of the following jumper selection procedures Jumper locations are shown in Figure 4 2 4 50 05 JUMPER SELECTION 4 51 The US jumper selection procedure should be performed if 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 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 to the 5 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 R6 RS 190 19 1000VDC 190VDC 10 KHZ 10 00000 ooooooooon 00000000 000000000 00000009 00000000 090000000 00000000 00000000 00
67. alue 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 8050A 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 capability of an ac current meter up to 150A A clamp on coil designed into the probe aliows measurements to be made without breaking the circuit under test This coil serves as the secondary of a 1 1000 transformer The current carrying conductor being measured serves as the primary 600 39 Deluxe Test Lead Set safety designed 8134 600 40 The Model Y8134 Deluxe Test Lead Set
68. ance 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 Eb x Im Es Eb EXAMPLE Es 15V RI 100 kQ Im 148 51 14851 mA Eb 148 51 x 10 x 200 2 35 148 51 x 10 5 x 1000 35 148 56 Max error in 100 x 148 56 mV 15V 14856V 1 0003 Add this to the range spec accuracy Max error in 1 000396 2 2 digits Max error in 148 56 mV x 148 51 15000 mV 148 56 mV 1 486 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 resistances less than 2000 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 1 Setup the 80504 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 s
69. ction 2000 2 Connect the DMM Calibrator to the 8050A as follows HI to the 5 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 dismantling the test setup 4 7 A rs a LINEAR TEST Table 4 7 Resistance and Conductance Tests ELE 2002 00 00 to 00 04 2002 99 88 to 100 14 2 9988 1 0012 20 9 993 10 007 200 99 93 100 07 2000 997 2 1002 8 20 9 972 10 028 2 5 9985 1 0015 200 5 99 30 100 70 c O 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 c
70. d 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 93 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 FSR SRE EEE TMA qapisqa saq OPERATION AC VOLTAGE CURRENT MEASUREMENT Using the dB function on the 8050 measure the voltage at TP1 or intended reference While measuring the intended reference set the RELATIVE switch to ON In this circuit 1 mV becomes the 0 dB reference Allsubsequent dB measurements in the circuit are displayed as the loss or gain of the circuit m dB TP3 57 5 dB TP3 Figure 2 13 dB Circuit Gain or Loss Measurements 2 94 The8050A 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
71. dc 1 9V dc 19V dc 190V dc 1000V dc DISPLAY READING 189 92 to 4190 08 189 92 to 190 08 1 8992 to 1 9008 1 8992 to 1 9008 18 992 to 19 008 189 92 to 190 08 999 5 to 1000 5 200 mV 190 mV ac rms 100 mV ac rms 1 9V ac rms 188 95 to 191 05 188 95 to 191 05 180 20 to 199 80 985 to 1015 1 8895 to 1 9105 1 8895 to 1 9105 1 8020 to 1 9980 18 895 to 19 105 18 895 to 19 105 18 020 to 19 980 188 95 to 191 05 99 40 to 100 60 190V 200V 90V ac rms 100 Hz 100V ac rms 10 kHz 750V 750V ac rms 1 kHz 745 2 10 754 8 745 2 to 754 8 M i lati 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 On the 8050A set the POWER switch to OFF 7 Setthe REF Z switch to ON in 8 On the 80504 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 l 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 default reference impedance has been changed 9 This concludes
72. 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 EE A my 2 N 20 700 521 NU 2 2 2000 Figure 2 5 Resistance Operation sr Mr pa marem E OPERATION CONDUCTANCE CONDUCTANCE S 1 0 1 DE ENERGIZE CIRCUIT TO BE MEASURED 2 SELECT RANGE 3 SELECT FUNCTION 4 CONNECT TEST LEADS HIGH LOW Zero the display with the RELATIVE RELATIVE 20 OFF A 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
73. eous 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 F1 and or F2 is blown 3 40 Voltage Protection 3 41 In the volts mode of operation protection against inputs and transients above the input ratings of the 8050A is provided by metal oxide varistors 1 RV2 and by R2 and Q1 RV2 and clamp the voltage across the measurement circuitry at approximately 1200V while R1 and R2 limit the input current 3 42 In the mode of operation protection is provided by thermistor 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 028 and diode clamp the voltage across the current shunts until the fuses F1 and F2 blow
74. equency 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 Responds to the peak of input and is calibrated read value of a sine wave Voltage Range 0 25 to 30V rms Maximum Input Voltage 30V rms 200V dc Input Capacitance Approximately 3 pF Temperature Range OPERATING 10 C to 35 G ET 40 C to 75 G Humidity lt 90 R H Output Connector Fits standard 0 75 inch dual banana connectors ACCESO Via to Probe Adapter P N 574756 Y8100 DC AC CURRENT PROBE Ranges 204 0 dc 2004 Rated Output 2V at full range Accuracy DG TO 200 mrs 2 of range 200HZ TO1KHZ add 3 reading gt 100A add 6 reading Calibration Cycle 1 year Frequency Response dc to 1 0 kHz Recommended Load 23 0 kQ Temperature Range 159 to 35 C for specified accuracy 10 C to 50 C storage and operation at reduced accuracy 600 7
75. ero 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 the unknown input to the DMM is 3 1 OPERATION CIRCUIT DESCRIPTION negative the buffer goes negative the integrator goes positive and CM will go negative C9 will 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
76. fore work is started if requested THE FOREGOING WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY FITNESS OR ADEQUACY FOR ANY PARTICULAR PURPOSE OR USE JOHN FLUKE MFG CO INC SHALL NOT BE LIABLE FOR ANY SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER IN CONTRACT TORT OR OTHERWISE M any failure occurs the following steps should be taken 1 Notify the JOHN FLUKE MFG CO INC or nearest Service facility giving full details of the difficulty and include the model number type number and serial number On receipt of this information service data or shipping instructions will be forwarded to you 2 On receipt of the shipping instructions forward the instrument transportation prepaid Repairs will be made at the Service Facility and the instrument returned transportation prepaid SHIPPING TO MANUFACTURER FOR REPAIR OR ADJUSTMENT All shipments of JOHN FLUKE MFG CO INC instruments should be made via United Parcel Service or Best Way prepaid The instrument should be shipped in the original packing carton or if it is not available use any suitable container that is rigid and of adequate size If a substitute container is used the instrument should be wrapped in paper and surrounded with at least four inches of excelsior or similar shock absorbing material CLAIM FOR DAMAGE IN SHIPMENT TO ORIGINAL PURCHASER The instrument sho
77. g at both ends RECOMMENDED MODEL John Fluke Mode 51008 Digital Multi Meter DMM Calibration Leads John Fluke Model 8020B Pomona 2BC 24 4 11 CALIBRATION ACCESS 6 reassemble reverse the previous procedures 4 12 Use the following procedure to gain access to the in a logical order ibrati just the back calibration adjustments or the backup fuse F2 4 13 DISPLAY PCB ACCESS 1 Setthe POWER switch to OFF 4 14 Usethe following procedure to access the Display PCB 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 Flipthe Display PCB over on the right side of With the power cord replaced the instrument the instrument is operational for troubleshooting CAUTION WARNI
78. gnal 50 Hz square wave Low Battery indicates that the rechargeable batteries in the 01 Option need recharging Decibels De integrate plus reference used with a negative input De integrate minus reference used with a positive input Decimal Point External Interrupt stops the counter in the microcomputer Function inputs to microcomputer A 52 usec maximum period immediately following INT High Voltage comes on when the instrument measures 40V or greater Integrate Liquid Crystal Display Defines front panel selection of a function range requiring an A D gain of 10 A 5 msec period at the beginning of auto zero when an overrange is detected Power On Reset 500 msec pulse at turn on which initializes the A D Relative indicates that the readings displayed are relative to the input applied when the RELATIVE switch was set to ON Range inputs to microcomputer Siemens 1 9 Five sequential Strobe pulses Touch amp Hold BCD data lines impedance Figure 7 1 Mnemonics SCHEMATIC DIAGRAMS d mU Y 5 33 FOR SCHEMATIC DIAGRAM SEE FIGURE 7 3 BY STATIC ELECTRICITY Figure 7 2 A1 Main PCB Assembly Line Supply 7 3 VOTES gt A FOR AND CONEIGURATION FOR MOV CONFIBUEKATION 444 RESISTANCE VALLES ARE IN OMIS 44 VALLIES ARE IN MEROFAZAD 5 FACTORY
79. hat 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 measured voltage is beyond the limit then replacement of the RMS Converter is indicated 4 57 TROUBLESHOOTING WARNING DANGEROUS VOLTAGES EXIST ON PCB ASSEMBLIES EXPOSED FOR TROUBLE 4 58 The following information is provided to help 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 the apparent 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 4 12 JUMPER CONFIGURATION FOR AC CALIBRATION RMS CONVERTER U32 CALIBRATION DISPLAY READING All Jumper Pins Installed NETWORK U33 JUMPER CONFIGURATION MP20 AS VIEWED FROM LEFT SIDE OF 8050A NO JUMPERS INSTALLED io er sme PQ Table 4 12 Test Points
80. he 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 asa 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 available 2 47 Use the following procedure to reference dBm measurements to impedances that are not provided by the 8050A 1 Use the following formula to convert the circuit impedance into a reference level Reference Level 0 001 x circuit impedance ITT TT S UHR KW SEY Nee S 5 OPERATION RESISTANCE MEASUREMENT 2 Connect the 8050A to the Voltage Standard as follows 5 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 n
81. heir cases Install the center mounting bracket asshown 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 panelusing the nuts provided CENTER MOUNTING BRACKET 8 Installthe 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 probe accessories are shown in Figure 600 5 and are described in the following paragraphs Table 600 1 contains allapplicable specifications for the probes 600 17 Touch Hold 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 a
82. is section Both mechanical and electrical components are listed by reference designators Each assembly is accompanied by an illustration showing the 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 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 II ou EN ns L qoum scree Table 5 1 8050 Final Assembly DESCRIPTION FINAL ASSEMBLY FIGURE nd 80508 MAIN PCB ASSEMBLY LINE FUSE 2 FUSE FIBRE 600 SCREW PHP 6 32 X 1 4 SCREW PHP 6 32 X 1 2 SCREU 4 40 X 1 4 SCREW THD FORMING 5 20 X 5 16 SCREW SEMS 6 32 X 1 4 SCREW PHP 6 32 X 3 8 WASHER FLAT CABLE DISPLAY INTERCONNECT DISPLAY LIGUIO CRYSTAL BEZEL LCD BRACKET LCD BUTTON SWITCH FUNCTION BUTTON SUITCH GREEN BUTTON
83. lative function for all measurements Push on push off switch Used for energizing and de energizing the instrument OPERATION OPERATING TECHNIQUES 2 22 AC DC Voltage V 2 23 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 measuring an unknown voltage set the DMM the highest range then if 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 respond when measuring current check the fuse refer to the fuse replacement procedure in this section If measuring an unknown current set the DMM on the highest range then if needed select a lower range 2 3 Yaw OPERATION LCD DISPLAY 8050A 01 ONLY LOW BATTERY INDICATOR POLARITY SIGN DISABLED DURING mA AND FUNCTIONS DECIBEL FUNCTION IN USE HIGH VOLTAGE gt 40 Vdc or ac rms BEING MEASURED 8050A DISPLAY ANNUNCIATORS RELATIVE FUNCTION IN USE
84. li NN An 8 8 4 mad CERAMIC 1009 PF 10 500V 025 UF 202 150 200 ELECT 47 UF 20 10V ELECT 47 UF 20 10V MICA 330 5 500V ELECT 10 UF 20 160 10 UF 20 15 1000 PF 20 100 0238101 1030 ELECT 10 20 16U 614837 DIODE FED CURRENT REGULATOR 393454 5290 DIODE SI RECTIFIER 2 AMP 50 VOLT 347559 145400 DIODE SI LO CAP LO LEAK FD7223 01006 SI LO CAP LO LEAK FD7223 DIODE SI LO CAP LO LEAK SPRING COMPRESSION COIL SUPPORT HYBRID TO SUPPORT RESISTOR CLIP COMPONENT SPACER SWAGED SPACER STANDOFF XSTR SI NPN 51 NPN SI NPN METAL SI PNP FIELD EFFECT FET FIELD EFFECT FET SI PNP 51 NPN PNP SELECTED PNP SELECTED PNP PNP SELECTED NPN afani A pe gt LIST REPLACEABLE 5 Table 5 2 41 Main PCB Assembly cont DESCRIPTION CER 100K 10Z 1720 VAR 100 10 1 20 VAR CER 1K 10 1 24 COMP 220K 10 20 VAR 500 10 1 20 200 10 1 20 DEP CAR 1M 5 1 44 DEP CAR 20 5 1 2 MTL FILM 900 0 11 1 TL FILM 90 1 8u 9 154 1 COMP 100K 5 24 2 21 10 1 20 COMP 221 51 1 40 DEP CAR 100 51 1 4 DEP CAR 100 5 1
85. ment 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 1 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 tests in an environment with an ambient
86. nd 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 rss sssi ACCESSORIES PROBE ACCESSORIES 600 19 Temperature Probe Celsius 80T 150C 600 20 The 80T 150C Temperature Probe converts your instrument into a direct reading 1 mV dc 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 150F is set to read in degrees Fahrenheit 600 23 Current Transformer 801 600 600 24 The Model 801 600 Current Transformer extends the maximum 2 ac current measuring limit of the 8050A to a maximum of 600A The clamp on transformer design allows measurements to be made 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 pe
87. ned 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 means 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 91 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 an
88. ng 3 7 RMS Converter ue E 3 9 Display Access pre Ere 4 3 Calibration Adjustment Locations 4 9 80504 Digital Multimeter vi Section 1 Introduction and Specifications 1 1 INTRODUCTION 1 2 Your John Fluke Model 80504 is a 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 2 dc and 10 to true rms ac Resistance measurements from 10 to 20 8050A also has severalspecial measurement features These special features include the following Conductance measurements up to 100 000 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 Theability to store any input signal as an offset or relative reference value e Automatic polarity indication and overrange indication Protection from overloads and protection from transients of up to 6 kV 10 microseconds e Dual slope integration conversion to ensure noise free measurements
89. ngton Associated Machine Santa Clara California Date Electronics Inc Columbus Nebraska TECHNICAL SERVICE CENTERS U S amp Canada CA Burbank Fluke Technical Center 2020 N Lincoln Street Burbank CA 91504 213 849 4641 CA Santa Clara Fluke Technical Center 2300 Walsh Ave Bidg K Santa Clara CA 95050 408 727 8121 CO Denver Fluke Technical Center 1980 S Quebec St Unit 4 Denver CO 80231 303 750 1228 FL Fluke Technical Center 940 N Fern Creek Avenue Orlando FL 32803 305 896 2296 IL Rolling Meadows Fluke Technical Center 1400 Hicks Road Roliing Meadows IL 60008 312 398 5800 MA Burlington Fluke Technical Center 25 Street Burlington 01803 617 273 4678 MD Rockville Fluke Technical Center 5640 Fishers Lane Rockville MD 20852 301 770 1576 NJ Paramus Fluke Technical Center West 75th Century Road Paramus NJ 07652 201 262 9550 TX Dallas Fluke Technical Center 14400 Midway Road Dallas TX 75240 214 233 9945 WA Everett Fluke Technical Center 6920 Seaway Blvd Everett WA 98206 206 356 5560 ALB Caigary Allan Crawford Assoc Ltd 14 1935 30th Ave N E Calgary Alberta T2E 625 403 230 1341 ONT Mississauga Allan Crawford Assoc Ltd 6503 Northam Drive Mississauga Ontario 1 4V 192 416 678 1500 QUE Montreal Allan Crawford Assoc Ltd 7018 Cote de Liesse Montreal Quebec 1 7 514 73
90. ompleted refer to the Jumper Selection procedures given later in this section NOTE On 8050 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 Connect the DMM Calibrator to the 8050A as follows to the V kO S input connector and LO to the COMMON input connector 2 Select the DC V function on the 8050 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 forthe 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 AC Calibration 1 Connect the DMM Calibrator to the 8050A as follows to the 5 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
91. onfiguration on the 8050A 1 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 l 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 Reassemble the instrument Table 4 2 dB Impedance Selection REFERENCE IMPEDANCE 4 4 14 Diode Type Use Fluke P N 203323 1N4448 1N914 or equivalent 4 4 ET MAINTENANCE PERFORMANCE TESTS MM M 4 26 Cleaning CAUTION Do not use aromatic hydrocarbons or chlorinated solvents for cleaning These solutions will react with the plastic materials used in the instru
92. orting 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 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 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 and 5 to 100 000 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 lead
93. ow 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 Riz 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 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 1 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 WARNING OPERATOR INJURY AND INSTRUMENT DAMAGE MAY RESULT IF THE BACKUP FUSE F2 BLOWS WHEN CURRENT IS BEING MEASURED FROM A VOLTAGE GREATER THAN 600 VOLTS 2 53 BURDEN VOLTAGE ERROR 2 54 When a multimeter is
94. phs 600 1 ha E ACCESSORIES 600 11 OFFSET AND CENTER MOUNTING KITS M00 200 611 AND M00 200 612 600 12 Usethe following procedure to install an 8050A using a center mounting or an offset mounting kit 1 600 2 ISR A R A i Remove the carrying handle by removing the handle disc decals and the handle mounting Screws Remove the screw from the rear of the case and remove the case Install the side mounting brackets as shown in Figure 600 3 and secure them to the mounting panel using the nuts provided Figure 600 3 Rack Mounting Kits Offset and Center Mounting r T TET PATTERN ABRAN AE NEP pce me pnm IT wssarassamm 4 Insert the front of the case through the opening on the back side of the mounting panel 5 Install the handle mounting screws through the side brackets into the mounting bosses Don t overtighten these screws 6 Slide the instrument through the mounting panel and into the case Install and tighten the retaining screw at the rear of the case 600 13 DUAL MOUNTING KIT 00 200 613 600 14 Use the following procedure to install an 8050A using a dual mounting kit ACCESSORIES PROBE ACCESSORIES Remove the carrying handles from both instruments by removing the handle disc decals and the handle mounting screws Remove the retaining screw from therear ofthe cases and separate the instruments from t
95. 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 the shunt 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 measurement techniques for resistance measurements 1 DC VOLTAGE MEASUREMENTS Loading Error in 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 107 2 lt V1 27F Rin Cin Where Zin effective input impedance Rin 107 ohms Cin 100 x 10712 Farads F frequency in Hz Then determine source loading error as follows Loading Error in 100 x zum Where 25 source impedance Zin input impedance calculated Vector algebra required Figure 2 10 Circuit Loading Error 2 13 E 6 OPERATION RESISTANCE MEASUREMENT Es Source voltage RI Load resistance Source resist
96. preferred and is marked with a larger diode symbol on the front panel of the instrument The three non diode test ranges will not turn on silicon junctions so in circuit resistance measurements can be made with these three ranges i INTRODUCTION SPECIFICATIONS Table 1 2 8050A Specifications cont Conductance RANGE RESOLUTION ACCURACY for 1 Year 2 mS 10 0 1 of reading 5 digits 200 nS 01 nS 100 000 MAXIMUM OPEN CIRCUIT VOLTAGE OVERLOAD PROTECTION CONDUCTANCE UNITS Relative RELATIVE REFERENCE RELATIVE ACCURACY ENVIRONMENTAL Temperature Coefficient Operating Temperature Storage Temperature Relative Humidity GENERAL Maximum Common Mode Voltage Power Requirements Line Only Models LINE VOLTAGE POWER CONSUMPTION Standards 0 596 of reading 20 digits lt 3 5V 500V rms on all ranges We use the international unit of conductance the siemen S 1 0 Another unit of conductance is the mho 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 Error will not exceed the sum of the errors of the two measurements lt 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 and 82 4 F to 122
97. removed without special tools The fuse rating is 2A normal blow recommended part AGX2 2 12 Use the following procedure to replace the fuse F1 1 Set 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 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 coin 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 1 The features of the Liquid Crystal Display LCD are also described in the following paragraph 2 15 Display 2 16 Thefeatures 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 m
98. riods not exceeding 1 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 up to 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 minimizes circuit loading thus contributing to measurement accuracy The plastic housing provides for operator safety while measuring potentially dangerous voltages 600 29 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 minimizes circuit loading thus 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 v
99. s and Connectors 2 2 Liquid Crystal Display 2 4 AC DC Voltage Operation 2 5 AC DC Current Operation 2 6 Resistance Operation 2 7 Conductance Operation 2 8 Diode Test Operation 2 9 Relative Operation A 2 10 dB Voltage Operation 2 11 Circuit Loading Error 2 13 Calculating Burden Voltage Error 2 14 Transistor Beta Test Fixture 2 15 dB Circuit Gain or Loss Measurements 2 17 Waveform Comparisons 2 18 Crest Factor 4i cit ve e 2 19 Total RMS Valle 2 rey he esie dane 2 19 Measuring Amplifier Bandwidth 2 20 8050A Functional Block Diagram 3 3 AJ D Converter 3 4 A D Converter Waveforms 3 5 Microcomputer Simplified Block Diagram 3 6 Signal Conditioni
100. s to minimize the effect of leakage paths A op Sapa 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 of 2V and an Ic of about 200 This transistor tester is useful for checking the proper operation of transistors and approximate beta values for comparative measurements 2 72 The transistor tester fixture is described in Figure 2 12 When assembled and connected to the V k 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 e Defective transistors shorted or open Collector to emitter leakage 1 5 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
101. se be aware of voltage changes Certain components not be used therefore aay not be installed Ul P N 310941 may be used in place P N 501080 U2 P N 510834 may be used in place of P N 512905 A Dae EE NN nD SR ee OPTIONS RECHARGEABLE BATTERY 01 OPTION Be t NE 1 1 2 REF pb pmt pt ee 601 9 OPTIONS RECHARGEABLE BATTERY 01 OPTION Figure 601 2 1 Main PCB Assembly 8050 01 601 10 FACTORY SELECTED PARTS BE INSTALLED 8050 1611 OPTIONS RECHARGEABLE BATTERY 01 OPTION 8050A 1611 Figure 601 2 A1 Main PCB Assembly 8050A 01 cont 601 11 601 12 A RIA RT SR AE ET IRIS 4 Y 66 Section 7 Schematic Diagrams TABLE OF CONTENTS FIGURE TITLE PAGE 7 1 Mnemonhics 22 55 7 2 72 Al Main PCB Assembly Line Supply 7 3 7 3 Al Main PCB Assembly Schematic 7 4 7 4 Al Main PCB Assembly Battery 01 7 6 7 1 SCHEMATIC DIAGRAMS MNEMONICS 7 2 1 X 100 22 BT dB DE R DE R DP EXT INT Fa Fb Fc AC buffer gain of 1 command AC Buffer gain of 100 command Auto Zero Back plane drive si
102. service centers is located in Section 5 The container should include the following The 8050A Multimeter Two test leads 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 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 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
103. surement 2 16 THEORY OF OPERATION 3 1 3 1 INTRODUCTION kr l ed ens 3 1 3 3 FUNCTIONAL DESCRIPTION 3 1 3 5 CIRCUIT DESCRIPTION 3 1 i continued on page ii TABLE OF CONTENTS continued SECTION TITLE PAGE 3 7 AJ D Converter uyu el eee 3 1 3 18 Microcomputer 3 2 3 20 Signal Conditioning 3 6 3 31 True RMS Converter 3 8 3 38 Touch Hold Circuit 3 8 3 40 Voltage Protection 3 8 3 43 Current Protection 3 8 MAINTENANCE 4 1 4 1 INTRODUCTION ker ix 4 1 44 SERVICE INFORMATION 4 4 7 GENERAL INFORMATION 4 4 9 Interior ACCESS rV a o 4 1 4 24 dB Reference Impedance Power Up Setting 4 4 4 26 Cleaning u 4 since Seah a d medic we 4 5 4 28 PERFORMANCE TESTS 4 5 4 30 Initial Procedures 4 5 4 32 Display 4 5
104. tage on the 8050A 01 1 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 Reinstallthe case and relabel the 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 AN A M A OPTIONS RECHARGEABLE BATTERY 01 OPTION Table 601 2 8050A 01 Final Assembly FLUKE MFG DESCRIPTION STOCK SPLY MFG PART NO HE a NO CODE qv je 80504 FINAL ASSEMBLY BATTERY OPTION 01 WITH BATTERY OPTION FIGURE 601 1 80504 01 MAIN ASSEMBLY BATTERY WIRED FUSE FAST ACT 2A FOR EUROPEAN USAGE USE P N FUSE FIBRE 600 FUSE SLO BLO 1 164 FOR EUROPEAN USAGE USE 1 2409 REPLACE FUSE C IPS Ui NITH ee WHITE HIRE IN 240V HOLE PHP 6 32 X 1 SCREN PHP 6 32 X 12 RHP 4 40 X 1 THO F RPING 5 20 X 5 16 SETS 6 32 X 1 PHP 6 32 X ye WASHER 6 FLAT CABLE DISPLAY DISPLAY LIQUID CRYSTAL BEZEL LCD BRACKET LCD UTTON SWITCH FUNCTION SWITCH GREEN GR ye 5
105. 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 Ie PESE DDR THEORY OPERATION CIRCUIT DESCRIPTION U31H3ANOO SIA YSLAdWODOYOIN U3 1H3ANOO q v AV IdSIQ AW1dSI0 G91 SU3NOI LIGNOO TVNDIS SLNNHS SAHOLIMS 39NVH NOIL NN 4 NOILOILOWd 503 1 8050 Functional Block Diagram Figure 3 THEORY OF CIRCUIT DESCRIPTION A AUTOZERO SELECTABLE GAIN CIRCUIT 5 REFERENCE VOLTAGE INPUT DIVIDER OFFSET VOLTAGES AND BIAS FOR BUFFER V mA AND INTEGRATOR REFERENCE VOLTAGE 1V VR1 7 OVERRANGE INTEGRATE INPUT FROM SIGNAL CONDITIONERS SELECTABLE GAIN CIRCUIT RANGE AND READ DE R FOR POSITIVE UNKNOWN INPUTS FUNCTION SWITCHES REFERENCE VOLTAGE ZZ OVERRANGE INPUTS Figure 3 2 A D Converter MICROCOMPUTER ACCUMULATED COUNT 8 100m e e CHARGE ON C9 sec 8 00000 THEORY OF OPERATION CIRCUIT DESCRIP
106. tor 2 On the 8050A set the POWER switch to ON 8 Compare the 8050A display to the LOW and 3 Adjust R7 fully clockwise and adjust R29 the HIGH display readings in Table 4 10 and find center of its range the DISPLAY READING that the 8050A display is between Cut out the portion of the 4 Select the AC V function 2 range jumper as shown under the JUMPER CONFIGURATION heading that corresponds 5 Connect the DMM Calibrator to the 8050A as to the DISPLAY READING follows HI to the 5 input connector and LO to the COMMON input connector 9 Perform the Calibration Adjustments 6 Adjust the DMM Calibrator for 1 0000V ac 4 52 U33 JUMPER SELECTION rms at 200Hz 4 53 033 jumper selection procedure should be 7 Turn on the DMM Calibrator performed if the RMS Converter U32 has been replaced or if R7 does not have a sufficient adjustment range Use 8 Compare the 8050A display to the DISPLAY the following procedure to select the proper resistance for READING columns in Table 4 11 and find U33 which LOW and HIGH values that the 8050A display reading is between Cut out the portion 1 Using the 4 pin connecter p n 537522 of the jumper as shown under the JUMPER provided with the replacement parts kit short CONFIGURATION heading that corresponds MP21 jumper positions E F G to the DISPLAY READING 4 10 i pl ds nds RE MAINTENANCE CALIBRATION AD
107. tor 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 2 19 gra esl cae el E ig ae aa PRIN FEIER VOLTAGE CURRENT MEASUREMENT 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 SIONAL AMPLIFIER GENERATOR dB Rel Ref Level 04
108. uations 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 11 Select the 5 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 three 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 t
109. ula be thoroughly inspected immediately upon original delivery to purchaser All material in the container should be checked against the enclosed packing list The manufacturer will not beresponsible for shortages against the packing sheet unless notified immediately If the instrument is damaged in any way a claim should be filed with the carrier immediately To obtain a quotation to repair shipment damage contact the nearest Fluke Technical Center Final claim and negotiations with the carrier must be completed by the customer The JOHN FLUKE MFG CO INC will be happy to answer all applications or use questions which willenhance your use of this instrument Please address your requests or correspondence to JOHN FLUKE MFG CO INC P O BOX C9090 EVERETT WASHINGTON 98206 ATTN Sales Dept For European Customers Fluke Holland B V P O Box 5053 5004 EB Tilburg The Netherlands For European customers Air Freight prepaid John Fluke Mfg Co Inc P O Box C9090 Everett Washington 98206 Rev 6 81 SECTION 1 Table of Contents TITLE PAGE INTRODUCTION AND SPECIFICATIONS 1 1 1 1 INTRODUCTION 1 1 1 4 OPTIONS AND ACCESSORIES 1 1 1 5 SPECIFICATIONS 525225545455 5 e ov EA RN P Vs 1 1 OPERATION pb a E Ene e ow Sue M EU 2 1 2 1 INTRODUCTION reta 2 1 2 3 SETTING UP YOUR INSTRUMENT
110. ure 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 Selectthe 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 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 defi
111. ures 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 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 padding 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

Fluke Welder 8050A User's Manual

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