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Fluke 8062A Instruction Manual

True-rms multimeter
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This manual pertains to instruments with serial number 6830XXX
or higher.
PN 609153
May 1997 Rev.1, 1/00
© 1997, 2000 Fluke Corporation, All rights reserved. Printed in U.S.A.
All product names are trademarks of their respective companies.
8062A
True-rms Multimeter

Instruction Manual

®

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Summary of Contents for Fluke 8062A

  • Page 1: Instruction Manual

    This manual pertains to instruments with serial number 6830XXX or higher. 8062A True-rms Multimeter Instruction Manual PN 609153 May 1997 Rev.1, 1/00 © 1997, 2000 Fluke Corporation, All rights reserved. Printed in U.S.A. All product names are trademarks of their respective companies.
  • Page 2 LIMITED WARRANTY & LIMITATION OF LIABILITY Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is one year and begins on the date of shipment. Parts, product repairs and services are warranted for 90 days. This...

  • Page 3: Safety Information

    Safety Information This meter has been designed and tested in accordance with IEC Publication 348. To ensure that the meter is used safely, follow all safety and operating instructions in this manual. If the meter is not used as described in this man- ual, the safety features of the meter might be impaired.

  • Page 5: Table Of Contents

    Table of Contents Chapter Title Page Introduction and Specifications..........1-1 1-1. Introduction ................1-3 1-2. Specifications................1-4 Operation Instructions............2-1 2-1. Introduction ................2-3 2-2. Unpacking Your Instrument............. 2-3 2-3. Battery Installation or Replacement......... 2-3 2-4. Fuse Replacement ..............2-5 2-5.
  • Page 6 8062A Instruction Manual 3-7. Current Measurement ............3-9 3-8. Resistance Measurement............3-10 3-9. Continuity Measurement ............. 3-11 Maintenance................4-1 4-1. Introduction ................4-3 4-2. Service Information ..............4-3 4-3. General Information ..............4-5 4-4. Handling Precautions for Using Static Sensitive Devices ... 4-5 4-5.
  • Page 7 Contents (continued) 6-11. AC Current Transformer (Y8101)..........6-10 6-12. Safety Designed Test Lead Set (TL70) ........6-11 6-13. Deluxe Test Lead Set (Y8134)..........6-11 6-14. Slim Flex Test Lead Set (Y8140)..........6-12 6-15. Cables and Adapters ..............6-12 Schematic Diagrams .............. 7-1...
  • Page 8 8062A Instruction Manual...
  • Page 9 List of Tables Table Title Page 1-1. 8062A Accessories..............1-4 1-2. 8062A Specifications ............... 1-5 2-1. Controls, Indicators and Connectors........2-7 2-2. Input Overload Limits.............. 2-9 2-3. Resistance Function Autoranges and Resolution ..... 2-19 3-1. Voltage Input Divider .............. 3-9 4-1.
  • Page 10 8062A Instruction Manual...
  • Page 11 List of Figures Figure Title Page 2-1. Removal of Battery Compartment Cover......... 2-4 2-2. Battery Removal and Fuses............2-4 2-3. Controls, Indicators and Connectors........2-6 2-4. 8062A Display ................. 2-8 2-5. Overrange Indicator ..............2-9 2-6. Voltage Operation..............2-11 2-7. AC and DC Waveform Components........
  • Page 12 8062A Instruction Manual 7-5. A1 Main PCB Schematic Diagram .......... 7-7 7-6. A3 RMS PCB Schematic Diagram .......... 7-8 viii...

  • Page 13: Introduction And Specifications

    Chapter 1 Introduction and Specifications Contents Page 1-1. Introduction ..............1-3 1-2. Specifications ..............1-4...
  • Page 14 8062A Instruction Manual...

  • Page 15: Introduction

    Introduction and Specifications Introduction 1-1. Introduction Your Fluke Model 8062A is a handheld, microcomputer-based 4-1/2 digit multimeter that is ideally suited for use in the field, laboratory, shop or home. The 8062A has all the features that have become accepted standards for quality handheld multimeters, as well as some new features that have not been offered before in a handheld multimeter.

  • Page 16: Specifications

    8062A Instruction Manual Low battery voltage is automatically detected and displayed. The low battery indication, BT, appears on the display when about 20% of the battery life remains. A full line of accessories is available to enhance the capabilities of the 8062A.
  • Page 17 Introduction and Specifications Specifications Table 1-2. 8062A Specifications Electrical The following specifications are based on a one-year calibration cycle, an operating temperature of 18 to 28°C (64 to 82°F) and a relative humidity not exceeding 90%. DC Voltage Accuracy Range Resolution ±(% of reading + no.
  • Page 18 8062A Instruction Manual Table 1-2. 8062A Specifications (cont) AC Voltage (True RMS, AC-Coupled) Ranges ..........200 mV, 2V, 20V, 200V, 750V Accuracy *.......... (% of reading + no. of digits). See table below: Input Resolution Range 20 Hz - 45 Hz - 500 Hz - 10 kHz - Voltage...
  • Page 19 Introduction and Specifications Specifications Table 1-2. 8062A Specifications (cont) Resistance Ranges........200 , 2 k , 20 k , 200 k , autoranging M . The M range extends from .0001 m to 300 M in three autoranged ranges. Upscale range changes are made at 2 M and 20 M .
  • Page 20 8062A Instruction Manual Table 1-2. 8062A Specifications (cont) Continuity Ranges........... All resistance ranges Threshold ........Nominally <50% of range (for example, 100 in the 200 range) for 200 , 2 k , 20 k , 200 k ranges. Nominally <100 k in autoranging k .
  • Page 21 Introduction and Specifications Specifications Table 1-2. 8062A Specifications (cont) AC Current (True RMS Responding, AC-Coupled Accuracy *........(% of reading + no. of digits). See table below. Input Resolution Range 20 Hz - 45 Hz - 3 kHz - 10 kHz - Current 45 Hz 3 kHz...
  • Page 22 A/D Converter....Dual-slope converter Power ......... Single standard 9V battery (NEDA 1604), or Fluke A-81 Battery Eliminator option available for 100, 115, or 230V ac operation. Battery Life ......Typically 170 hours with an alkaline battery. BT appears on display when approximately 20% of battery life remains.

  • Page 23: Operation Instructions

    Chapter 2 Operation Instructions Contents Page 2-1. Introduction ..............2-3 2-2. Unpacking Your Instrument ........... 2-3 2-3. Battery Installation or Replacement ....... 2-3 2-4. Fuse Replacement............2-5 2-5. Physical Features ............2-6 2-6. Front Panel..............2-6 2-7. Display................ 2-8 2-8. Signal Input Limits ............2-9 2-9.
  • Page 24 8062A Instruction Manual...

  • Page 25: Introduction

    Operation Instructions Introduction 2-1. Introduction This chapter describes how to make measurements with your 8062A. Even though you may have used a multimeter before, we suggest that you take the time to read this material carefully so that you can take full advantage of the wide variety of measurement functions offered by the 8062A.

  • Page 26: Removal Of Battery Compartment Cover

    8062A Instruction Manual Turn the instrument over and remove screw from battery cover as shown in Figure 2-1. Use your thumbs to push off the battery cover as shown in Figure 2-1. Slide the battery out of the compartment as shown in Figure 2-2. Carefully pull the battery clip free from the battery terminals (if replacing the battery) and attach the new battery.

  • Page 27: Fuse Replacement

    Replace F1 with the appropriate 2A/250V fuse; American-style: fast-acting, type AGX2, 1/4 x 1”, Fluke PN 376582; European-style: 5 x20 mm, Fluke PN 460972. Do not use makeshift fuses or short-circuit the fuseholder.

  • Page 28: Physical Features

    8062A Instruction Manual 2-5. Physical Features Before you begin using your 8062A, we suggest you take a few minutes to familiarize yourself with the instrument. All of the externally accessible features are shown in Figure 2-3 and described in Table 2-1. The front panel and the display are also described in the following paragraphs.
  • Page 29 Operation Instructions Physical Features Table 2-1. Controls, Indicators and Connectors Item Name Function Battery Eliminator External input power connector for use with Connector the A81 Battery Eliminator accessory. Function Buttons: Push buttons that toggle on or toggle off the , REL ‘secondary functions: visible or audible continuity, or relative.

  • Page 30: Display

    8062A Instruction Manual Table 2-1. Controls, Indicators and Connectors (cont) Item Name Function Tilt Bail A fold-out stand. The bail may also be removed (press on one of the legs at the hinge of the bail) and reinserted from the top as a hook for hanging the instrument.

  • Page 31: Signal Input Limits

    Operation Instructions Signal Input Limits dy07f.eps Figure 2-5. Overrange Indicator 2-8. Signal Input Limits Caution Exceeding the maximum input overload limits can damage your instrument. Before you begin to use your 8062A, it is important to note the maximum inputs that may be applied to the instrument. Table 2-2 presents the maximum inputs that are allowed for each function, range, and input terminal.

  • Page 32: Operation

    8062A Instruction Manual 2-9. Operation The following paragraphs describe the power-on self-test, and how to operate your 8062A in each of the seven primary functions or the two secondary functions. 2-10. Power-On Self-Test To turn on your instrument, locate the green switch on the left side of the instrument and slide it forward.

  • Page 33: Ac/Dc Voltage (V)

    Operation Instructions Operation 2-11. AC/DC Voltage (V) Selection of the ac or dc voltage (V) functions is described in Figure 2-6. The 8062A offers five ac and five dc voltage ranges: 200 mV, 2V, 20V, 200V, and 750V ac/1000V dc. All ranges present a 10 M input impedance, which is shunted by <100 pF.

  • Page 34: Ac-Coupled Ac Measurements

    8062A Instruction Manual complex ac signals. Since rms is the dc equivalent to the original waveform, it can be used in the relationships derived from Ohm’s law (E = I x R), and provides a reliable basis for comparing dissimilar waveforms. Most meters in use today have average-responding ac converters rather than true rms ac converters like the 8062A.

  • Page 35: Waveform Comparison And Conversion

    Operation Instructions Operation 2-14. Waveform Comparison and Conversion Figure 2-8 shows the relationship between common waveforms and the display readings for the 8062A and average-responding meters. Figure 2-8 also illustrates the relationship between ac and dc measurements for ac- coupled meters. For example, consider the first waveform, a 1.414V (0-pk) sinewave.

  • Page 36: High Impedance Dc Voltage

    8062A Instruction Manual Since average-responding meters have been in use for so long, you may have accumulated test or reference data based on them. The conversion factors in Figure 2-8 should help you convert between the two measurement methods. 2-15. High Impedance DC Voltage Occasionally you may want to make dc voltage measurements in high impedance circuitry where even the 10 M input impedance for the normal dc voltage function could load the circuit and cause significant errors.

  • Page 37: Ac/Dc Current (A)

    Operation Instructions Operation Note When taking measurements in the high impedance dc voltage function, do not select any ranges except the 2V or 200 mV ranges. Measurement in other ranges will result in erroneous readings. Note When the high impedance dc voltage function is selected and no inputis applied, noise from the environment (such as rf or power line noise) may cause the 8062A to display OL (overrange).
  • Page 38 8062A Instruction Manual Current (A) High (+) 1. Select a range. 2. Set AC/DC switch out Low (-) for DC, in for AC. 3. Push both switches at the same time to select current function. 4. Ensure all other switches are out. 5.
  • Page 39 Operation Instructions Operation Ammeter Shunt dy12f.eps Es = Source Voltage RI = Load resistance + Source resistance Im = Measured current (display reading in amps) Eb = Burden voltage (calculated) Eb = meas. current [(200/current range in mA) + .35] Error: Error in % = 100 x Eb/(Es - Eb) Error in A = (Eb x Im)/(Es - Eb)

  • Page 40: Resistance ( )

    8062A Instruction Manual 2-17. Resistance ( ) Selection of the resistance function is described in Figure 2-12. There are four fixed ranges (200 , 2 k , 20 k , 200 k ) plus the autoranging M range consisting of three ranges: 2 M , 20 M , and 300 M . In all fixed resistance ranges (200 , to 200 k ), the test voltage is less than that required to turn on most semiconductor junctions.

  • Page 41: Autoranging Megohms

    Operation Instructions Operation Resistance measurements for all ranges are made using a two-wire ratiometric technique. This means that test lead resistance may affect the accuracy in the 200 range. You can correct this error by shorting the test leads together, reading the test lead resistance, and then subtracting it from resistance readings.

  • Page 42: Autoranging Kilohms

    8062A Instruction Manual 2-19. Autoranging Kilohms Although it is not indicated on the front panel, there is an additional autoranging range available: the autoranging k range, which consists of 2 k , 20 k , and 300 k ranges. To select this range, you must simultaneously press the M and the 200 switches as shown in Figure 2- 13.

  • Page 43: Diode Test (G)

    Operation Instructions Operation 2-20. Diode Test ( G ) Selection of the diode test is described in Figure 2-14. Notice how the test leads are placed to forward-bias or reverse-bias the diode in the figure. The diode test measures the forward voltage of a semiconductor junction (or junctions) at a 1 mA ( 10%) test current.

  • Page 44: Relative (Rel)

    8062A Instruction Manual A quick way to check for shorted or open junctions is to reverse the test leads. If the junction indicates the same in-scale reading both directions, it is probably shorted. If the junction indicates an overrange both directions, it is open.
  • Page 45 Operation Instructions Operation For example, if a reading of 1.0000V dc is displayed when the REL button is pressed, (the display will read 0.0000 after REL is pressed), subsequent readings will have 1.0000 subtracted from them. If the next measurement is 1.2700V dc, the reading displayed will be .2700.
  • Page 46 8062A Instruction Manual for it, select the desired resistance range, short the test leads together, and press the REL button. The REL indicator will appear and the display will read zero. The 8062A will automatically subtract the stored test lead resistance from subsequent measurements.

  • Page 47: Continuity ( )

    Operation Instructions Initial Check-Out Procedure 2-22. Continuity ( To select the continuity function, first select the resistance function and then press the button under the display. The button functions like a three-position switch: the first button press enables visible continuity (the indicator is displayed), the second button press enables audible continuity (the is displayed), and the third button press cancels...
  • Page 48 8062A Instruction Manual Continuity ( Continuity Button Low (-) High (+) 1. Select range. 2. Set switch in for resistance function. 3. Ensure that other switches are out. 4. Press the button once to enable visible continuity: Press the button again to enable audible continuity: (Press again to disable both): 5.
  • Page 49 Operation Instructions Initial Check-Out Procedure DC VOLTAGE - Select the dc voltage function and the 20V range. Read the battery voltage by touching the probe tip from the lead connected to the V jack to the side contact (not the center pin) in the opening for the battery eliminator jack on the right side of the instrument.
  • Page 50 8062A Instruction Manual 2-28...

  • Page 51: Theory Of Operation

    Chapter 3 Theory of Operation Contents Page 3-1. Introduction ..............3-3 3-2. Functional Description ............. 3-3 3-3. Microcomputer.............. 3-3 3-4. Measurement Acquisition Chip (MAC) ......3-5 3-5. A/D Converter Cycle ............ 3-5 3-6. Voltage Measurement ........... 3-8 3-7. Current Measurement............ 3-9 3-8.
  • Page 52 8062A Instruction Manual...

  • Page 53: Introduction

    Theory of Operation Introduction 3-1. Introduction This chapter describes how the 8062A works. An overview of the operation is provided first, followed by description of the two major components and the measurement functions. A detailed schematic of the instrument appears in Chapter 7.

  • Page 54: 8062A Block Diagram

    8062A Instruction Manual Ohms Range Source Voltage Divider Function REL Push V/ /S Switches Buttons +1.0000V Digital Ohms Ref A/D Ref Control Resistors Logic Common Micro- computer True RMS Converter AC Converter Power Current Power Supply Supply Shunts Ctl. Cont. Tone Switch Sense Logic...

  • Page 55: Measurement Acquisition Chip (Mac)

    Theory of Operation Functional Description The microcomputer initiates the a/d measurement cycle (approximately 400 ms) which is described later in this chapter. The microcomputer processes the data obtained in the measurement cycle. This includes calculations for the relative (REL) offset and M autoranging.
  • Page 56 8062A Instruction Manual Integ Integ or Read 200 mV 2V dc To Digital Integrator Gain Control Logic Buffer Amp Read Integrator Comparators Reference Voltage Integ Unkown Input Voltage Internal to the MAC dy26f.eps Figure 3-2. Analog Portion of the A/D Converter The measurement cycle begins with the autozero period.

  • Page 57: A/D Measurement Cycle

    Theory of Operation Functional Description A/D Measurement Cycle Integ Read Overrange (“OL” on display) Fullscale reading scale reading Waveform at 100 ms the Integ Capacitor 400 ms Accumulated Counts dy27f.eps Figure 3-3. A/D Measurement Cycle As the read period begins, the INTEG switches open and the READ switches close.

  • Page 58: Voltage Measurement

    8062A Instruction Manual 3-6. Voltage Measurement Both the ac and dc voltage ranges use an over-voltage-protected 10 M input divider as shown in Figure 3-4. The over-voltage protection includes two 2-watt fusible resistors and four metal-oxide varistors for high voltage clamping.

  • Page 59: Current Measurement

    Theory of Operation Functional Description The ac input voltages are divided with the same divider arrangement as the dc input voltages, with the exception that the 2V ac voltage range is divided by 10. The divider output signals for ac voltages are ac-coupled to the input of a true rms ac converter which produces a current output.

  • Page 60: Resistance Measurement

    8062A Instruction Manual Current Shunt True RMS Converter Inputs to A/D Converter Common dy29f.eps Figure 3-5. Current Measurement 3-8. Resistance Measurement Resistance measurements are made using a ratio technique as shown in Figure 3-6. When the resistance function is selected, a series circuit is formed by the ohms source, a reference resistor from the voltage divider (selected by the range switches), and the external unknown resistor.

  • Page 61: Continuity Measurement

    Theory of Operation Functional Description 3-9. Continuity Measurement Continuity measurement is a voltage comparison made in the resistance mode as illustrated in Figure 3-6. The 8062A determines whether continuity exists in the circuit under test by comparing the voltage drop across the external circuit with a continuity reference voltage.
  • Page 62 8062A Instruction Manual 3-12...

  • Page 63: Maintenance

    Chapter 4 Maintenance Contents Page 4-1. Introduction ..............4-3 4-2. Service Information ............4-3 4-3. General Information ............4-5 4-4. Handling Precautions for Using Static Sensitive Devices ..............4-5 4-5. Disassembly and Reassembly ........4-5 4-6. Calibration and Backup Fuse Access ...... 4-6 4-7.
  • Page 64 8062A Instruction Manual...

  • Page 65: Introduction

    Malfunctions that occur within the limits 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 designated to service your instrument (in Alaska, Hawaii, Washington, or Canada call 206-356-5400).
  • Page 66 1 kHz to 10 kHz, 0 to 200 V, (0.06%) 10 kHz to 30 kHz, 0 to 200V, (0.1%) Calibrator Fluke 5700A 30 kHz to 50 kHz, 0 to 200V, (0.25%) 50 kHz to 100 kHz, 0 to 2.0V, (0.75%) Resistance: 100 to 10.0 M ,...

  • Page 67: General Information

    Maintenance General Information 4-3. General Information 4-4. Handling Precautions for Using Static Sensitive Devices Caution This instrument contains CMOS components which can be damaged by static discharge. Static sensitive components on the main pcb include U3 and U4. The microcomputer pcb includes one static sensitive component, U5, the microcomputer.

  • Page 68: Calibration And Backup Fuse Access

    8062A Instruction Manual Note It is not necessary to remove the main pcb from the bottom case in order to disassemble or reassemble the LCD. However, because the LCD and the microcomputer require similar special handling, the disassembly and reassembly procedures are described together. Caution To avoid contaminating the pcbs with oil from the fingers, handle the pcbs by the edges or wear gloves.

  • Page 69: Main Pcb Access

    Maintenance General Information AC Shield Elastomeric Strip Remove before removing Main PCB. When reassembling, install shield after installing Main PCB. Green Power Switch Cap Pry fuse out from the side. Backup Fuse F2 dy32c.eps Figure 4-1. CALIBRATION AND BACKUP FUSE (F2) ACCESS 4-7.

  • Page 70: Lcd And Microcomputer Pcb Disassembly And Assembly

    8062A Instruction Manual Caution Do not touch or contaminate the plastic insulator that is attached to the inside of the case bottom. When the instrument is assembled the insulator makes contact with the leads on the bottom of the main pcb. Contaminants could cause undesirable conduction paths.
  • Page 71 Maintenance General Information LCD Display Shock Absorber LCD Interconnect CAUTION: Use tweezers to insert. Do not handle with fingers. Microcomputer PCB CAUTION: LCD Bracket Static Sensitive. LCD Plate (Do not remove) Microcomputer LCD Support Interconnect CAUTION: Use tweezers to insert. Do not handle with fingers.

  • Page 72: Disassembling The Lcd

    8062A Instruction Manual The LCD interconnect (item 7) and the microcomputer interconnect (item 5) should not be touched with fingers or contaminated. Handle these items with tweezers and keep them clean. The microcomputer interconnect (item 7) is susceptible to corrosion caused by the reaction between the metal in the connector and possible contaminates in the air such as smoke or sulfur.

  • Page 73: Backup Fuse Replacement

    Replace the defective backup fuse with a 3A/600V type BBS-3 (Fluke PN 475004). Refer to section 2-4 for information about replacing fuse F1 (2A/250V; American style: fast acting type AGX2 1/4 x 1”, Fluke PN 376582; European style: 5 x 20 mm, Fluke PN 460972).

  • Page 74: Performance Tests

    8062A Instruction Manual 4-11. Performance Tests The following procedures allow you to compare the performance of your instrument with the specifications listed in Chapter 1. They are recommended for incoming inspection, periodic calibration, and to verify specifications. If the instrument fails any test, calibration adjustment and/or repair is needed.

  • Page 75: Voltage Test

    Maintenance Performance Tests 4-14. Voltage Test Use the following procedure to verify proper operation of the dc and ac voltage functions. Connect the UUT and the DMM Calibrator as shown in Figure 4-4. For each step in Table 4-2, select the UUT function and range as indicated.

  • Page 76: Resistance Test

    8062A Instruction Manual Calibrator dy35f.eps Figure 4-4. General Equipment Connection 4-15. Resistance Test Use the following procedure to verify proper operation of the resistance function: Connect the UUT and the DMM Calibrator as shown in Figure 4-4. Select the resistance function and follow the steps 1 through 7 as listed in Table 4-3.

  • Page 77: Continuity Test

    Maintenance Performance Tests Table 4-3. Resistance Test Step Range Input Resistance Display Limits short circuit 0.00 to 0.04 100.00 99.86 to 100.14 1.0000 k .9988 to 1.0012 20 k 10.000 k 9.988 to 10.012 200 k 100.00 k 99.88 to 100.12 1.0000 M .9978 to 1.0022 10.00 M...

  • Page 78: Equipment Connection For Current Test

    8062A Instruction Manual For each step in Table 4-4, select the UUT function and range as indicated. Program the DMM Calibrator for the specified input signal and verify that the displayed UUT value is within the indicated limits. Calibrator dy36f.eps Figure 4-5.

  • Page 79: Diode Test

    Test equipment needed for the adjustments are listed in Table 4-1. If the test equipment is not available, your nearest Fluke Service Center will be glad to help. Call (toll-free) 800-426-0361 for assistance. After you have completed the calibration adjustments, we recommend that you complete the performance tests to verify proper operation.
  • Page 80 8062A Instruction Manual Allow the UUT to stabilize with the power off for at least 30 minutes at an ambient temperature of 21 to 25 C (70 to 77 F). Complete the calibration access procedure presented earlier in this chapter. Connect the equipment as shown in Figure 4-4 and turn on the equipment.

  • Page 81: Troubleshooting

    Maintenance Troubleshooting 4-20. Troubleshooting Caution Static discharge can damage MOS components U3, U4, and U5. Follow the handling precautions for static sensitive devices previously described in this chapter. Never remove, install or otherwise connect or disconnect components without first setting the instrument power switch off and disconnecting any inputs to the instrument.

  • Page 82: Switch Decoding Self-Test

    8062A Instruction Manual 4-23. Switch Decoding Self-Test To select the switch decoding self-test, hold down the REL button while you turn on the instrument. After the power-on self-test has been completed (the display is .8.8.8.8), release the REL button. The instrument should now indicate the switch decoding.

  • Page 83: Troubleshooting Guide

    Maintenance Troubleshooting Table 4-5. Switch Decoding Self-Test Range Display Digit 0* 200 ( A, mV or 0 (default if no range selected) 2000 Push Button Display Digit 1* none Function Display Digit 3* AC Voltage DC Voltage AC Current DC Current Resistance Diode Test *Display digits are numbered 0 through 4 from right (LSD ) to left (MSD).
  • Page 84 8062A Instruction Manual One way to check the input circuitry is to attach a high impedance (>1000 M ) DMM at the input of the 8062A a/d converter, U3-6. You can do a lot of troubleshooting without the LCD and microcomputer pcb installed.
  • Page 85 Maintenance Troubleshooting Table 4-6. Troubleshooting Guide (cont) Test and Symptom Possible Cause/Suggestions Power Supply (cont) VDG (voltage between U3, C12, U5 TP7 and TP8) 3.15 0.08V VSS (voltage between U4, C21, C23 TP2 and common) -5.1 0.27V TP4 1.225 0.025V U3-11 1.0000 0.0004V Hint: if you suspect U3 power supplies are bad, you can drive the...
  • Page 86 8062A Instruction Manual Table 4-6. Troubleshooting Guide (cont) Test and Symptom Possible Cause/Suggestions Voltage Test - DC (cont) High impedance dc readings 0.00, normal dc readings correct DC readings incorrect for Leakage from pcb, U3-6/7, all ranges contamination DC readings correct for Input divider or input divider switches, 200 mV, 2V incorrect for 20V, 200V, 1000V...

  • Page 87: Diode Test

    Maintenance Troubleshooting Table 4-6. Troubleshooting Guide (cont) Test and Symptom Possible Cause/Suggestions Resistance Test (cont) Low range readings correct, Q3 and Q4 leak-check by seeing if high range readings off M reads OL with open input. Main pcb contaminated - clean carefully and check performance.
  • Page 88 8062A Instruction Manual Table 4-7. Troubleshooting the Resistance Function: Voltage Sources for Ranges Voltage Source Range Comment ( 10%) 4.5V These values should be obtained when 1.2V no external resistors are connected to 20 k 1.2V the resistance inputs. Measure voltage 200 k 1.2V between common (J2) and TP10.
  • Page 89 Maintenance Troubleshooting Table 4-8. U3 (MAC) Pin Descriptions (cont) Pin No. Mnemonic Description OREF- Reference input to a/d converter during OREF+ autozero period for resistance functions. Output of the a/d buffer circuit. Input for AZ capacitor. Input for INTEG capacitor. Battery test input.
  • Page 90 8062A Instruction Manual 4-28...

  • Page 91: List Of Replaceable Parts

    Chapter 5 List of Replaceable Parts Contents Page 5-1. Introduction ..............5-3 5-2. How to Obtain Parts ............5-3 5-3. Manual Status Information ..........5-4 5-4. Newer Instruments............5-4 5-5. Service Centers..............5-4...
  • Page 92 8062A Instruction Manual...

  • Page 93: Introduction

    Fluke Corporation and its authorized representatives by using the part number under the heading FLUKE STOCK NO. In the U.S., order directly from the Fluke Parts Dept. by calling 1-800-526-4731. Parts price information is available from the Fluke Corporation or its representatives.

  • Page 94: Manual Status Information

    5-5. Service Centers To locate an authorized service center, call Fluke using any of the phone numbers listed below, or visit us on the World Wide Web: www.fluke.com 1-800-44-FLUKE (1-800-443-5853) in U.S.A and Canada...
  • Page 95 List of Replaceable Parts Manual Status Information Ref or Fluke Part Revision Assembly Name Option No. Level Main PCB Assembly 865808 Digital PCB Assembly 538306 RMS PCB Assembly 609120 Table 5-1. 8062A Final Assembly Ref. Description Notes Des. MAIN PCB ASSEMBLY...

  • Page 96: 8062A Final Assembly

    SUPPORT, TOP SHIELD 612770 MP39 TEST LEAD ASSY, TL70A 855820 MP40 BUTTON,FUNC,SW,DK PEWTER, MODIFIED 930347 SWITCH, ELASTOMERIC 2 POSITION 604827 8062A INSTRUCTION MANUAL 609153 8062A OPERATOR GUIDE 632703 DMM ACCESSORY GUIDE 825851 FINAL TESTED PLASTIC PKG-8060 704759 LCD, 4.5 DIGIT, MULTIPLEXED 800003 GROUND STRIP,BECU,1.980+-.035...
  • Page 97 List of Replaceable Parts Test & Button Up (1 of 2) dy37c.eps Figure 5-1. 8062A Final Assembly...
  • Page 98 8062A Instruction Manual Test & Button Up (2 of 2) dy38c.eps Figure 5-1. 8062A Final Assembly (cont)
  • Page 99 List of Replaceable Parts Table 5-2. A1 Main PCB Assembly Ref. Description Qty Notes RMS PCB ASSEMBLY 609120 C1,C023, CAP,AL,100UF,+-20%,6.3V,SOLV PROOF 615906 C32,C34 CAP,CER,8PF,+-0.25PF,1000V,C0H 643551 CAP,VAR,0.25-1.5PF,1700V,TEFLON 218206 CAP,CER,47PF,+-2%,100V,C0G 832295 CAP,CER,0.01UF,+-2%,50V,C0G 631044 CAP,CER,820PF,+-2%,50V,C0G 631002 CAP,VAR,3-11PF,100V,CER 641712 C9,C18 CAP,POLYPR,0.22UF,+-10%,160V 446799 C10,C14 CAP,CER,0.01UF,+-20%,50V,Z5U 659045 C11,C15 CAP,CER,0.22UF,+-20%,50V,Z5U...
  • Page 100 8062A Instruction Manual Table 5-2. A1 Main PCB Assembly (cont) Ref. Description Qty Notes MP12-15 SPACER,LED .330 LG 930342 TRANSISTOR,SI,N-JFET,SEL,TO-92 721936 Q3,Q4,Q6 TRANSISTOR,SI,NPN,60V,310MW,SEL,TO-92 886916 TRANSISTOR,SI,NPN,30V,1W,TO-92 242065 R1,R2 RES,MF,1K,+-1%,100PPM,FLMPRF,FUSIBLE 474080 RES,CC,100M,+-10%,0.5W 190520 RES,CF,5.6K,+-5%,0.25W 442350 RES,VAR,CERM,2K,+-20%,0.3W 603753 RES,VAR,CERM,200,+-20%,0.3W 603738 RES,MF,154K,+-1%,0.125W,100PPM,1206 289447 RES,VAR,CERM,1K,+-20%,0.3W 614065 RES,MF,3.65K,+-1%,0.25W,100PPM 810754...

  • Page 101: A1 Main Pcb Assembly

    List of Replaceable Parts Table 5-2. A1 Main PCB Assembly (cont) Ref. Description Qty Notes CRYSTAL,3.2MHZ,+-0.005%,HC-18/U 513937 RNET,MF POLY,SIP,8060 HI V DIVIDER 539213 RES,WW,NET,TOL MATCHED 435727 RNET,MF,POLY,SIP,8060 LO V DIVIDER 611467 RES,CERM,NET,TOL/TC MATCHED 614164 RES,CERM,NET,TOL/TC MATCHED 614149 RNET,CERM,SIP,8060 I SHUNT 737569 1.
  • Page 102 8062A Instruction Manual 8062A-4031 iv39c.eps Figure 5-2. A1 Main PCB Assembly 5-12...
  • Page 103 List of Replaceable Parts Table 5-3. A3 RMS PCB Assembly Ref. Description Qty Notes CAP,TA,22UF,+-20%,6V,6032 876545 CAP,TA,2.2UF,+-20%,6V,3216 930248 CAP,TA,10UF,+-20%,6V,3216 105954 CAP,CER,0.1UF,+-10%,25V,X7R,0805 942529 DIODE,SI,DUAL,100V,200MA,SOT-23 821116 TRANSISTOR,SI,PNP,50V,225MW,SOT-23 820910 R1,R2 RES,MF,10K,+-0.1%,.125W,25PPM,1206 106366 RES,MF,8.45K,+-0.1%, 0.125W,25PPM,1206 689528 R4,R15, RES,CERM,15K,+-1%,.125W,100PPM,1206 769810 R5,R6 RES,CERM,200K,+-1%,0.1W,100PPM,0805 928882 RES,CERM,10K,+-1%,.125W,100PPM,1206 769794 RES,CERM,10M,+-5%,.125W,300PPM,1206 783274 THERMISTOR,RECT,POS,1.5K,+-30%...

  • Page 104: A3 Rms Pcb Assembly

    8062A Instruction Manual Circuit 1 Ref Des View Circuit 2 Ref Des View 8060A-4003M dy60f.eps Figure 5-3. A3 RMS PCB Assembly 5-14...

  • Page 105: Accessory Information

    Chapter 6 Accessory Information Contents Page 6-1. Introduction ..............6-3 6-2. Deluxe Carrying Case (C90) ..........6-3 6-3. Temperature Probes (80T-150C and 80T-150F) ....6-3 6-4. Current Transformer (80I-600)......... 6-6 6-5. High Voltage Probe (80K-6) ..........6-6 6-6. High Voltage Probe (80K-40) .......... 6-7 6-7.
  • Page 106 8062A Instruction Manual...

  • Page 107: Introduction

    Accessory Information Introduction 6-1. Introduction This chapter of the manual contains information concerning the accessories available of use with your multimeter. Each accessory, as shown in Figure 6- 1, is described in general terms under a separate major heading containing the accessory model number.
  • Page 108 8062A Instruction Manual dy55c.eps Figure 6-1. Accessories...

  • Page 109: Temperature Probes (80T-150C And 80T-150F)

    Accessory Information Temperature Probes (80T-150C and 80T-150F) dy56c.eps Figure 6-1. Accessories (cont)

  • Page 110: Current Transformer (80I-600)

    8062A Instruction Manual 6-4. Current Transformer (80I-600) The Model 80I-600 extends the maximum 2A ac current measuring capability of the instrument up to a maximum of 600 amps. A clamp-on transformer designed into the probe allows measurements to be made without breaking the circuit under test.

  • Page 111: High Voltage Probe (80K-40)

    Accessory Information High Voltage Probe (80K-40) 6-6. High Voltage Probe (80K-40) The Model 80K-40 extends the voltage measurement capability of the instrument up to 40 kV. Internally, the probe contains a special 1000:1 resistive divider. Metal-film resistors with matched temperature coefficients comprise the divider, and provide the probe with its excellent accuracy and stability characteristics.

  • Page 112: High Frequency Probe (85Rf)

    8062A Instruction Manual 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..

  • Page 113: Current Shunt (80J-10)

    5-way binding posts (red and black) 6-10. AC/DC Current Probe (Y8100) The Fluke Y8100 AC/DC Current Probe is a clamp-on probe that is used with a voltmeter, multimeter, or oscilloscope to read dc, ac or composite (ac on dc) current measurements. The jaws on the Y8100 are designed to clamp...

  • Page 114: Ac Current Transformer (Y8101)

    8062A Instruction Manual around conductors up to 3/4 inch in diameter. The pistol shape allows safe, easy, one-hand operation when making current measurements. The Model Y8100 probe is battery powered with size AA cells. It measures current to 200A dc or ac rms using most any voltmeter. Two ranges, 20A and 200A, produce a 2V output at full-range current.

  • Page 115: Safety Designed Test Lead Set (Tl70)

    This set will fit Fluke instruments with safety-designed input jacks. 6-13. Deluxe Test Lead Set (Y8134) The Y8134 is a deluxe test lead set. The attachments provided allow interconnection with a wide variety of leads and electronic components.

  • Page 116: Slim Flex Test Lead Set (Y8140)

    8062A Instruction Manual 6-14. Slim Flex Test Lead Set (Y8140) The Y8140 Test Lead Set 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 extendable tip probe on the other end. This flexible metallic tip conductor may be extended up to 2.5 inches and is insulated to within 0.1 inch of its tip.

  • Page 117: Schematic Diagrams

    Chapter 7 Schematic Diagrams Figure Title Page 7-1. A1 Main PCB Component Locations (TopView) ..... 7-3 7-2. Test Point Locations............7-4 7-3. . A/D Measurement Cycle ............ 7-5 7-4. . Switch Detail ..............7-5 7-5. .. A1 Main PCB Schematic Diagram........7-7 7-6.
  • Page 118 8062A Instruction Manual...

  • Page 119: A1 Main Pcb Component Locations (Topview)

    Schematic Diagrams 8062A-4031 iv39c.eps Figure 7-1. A1 Main PCB Component Locations (TopView)

  • Page 120: Test Point Locations

    8062A Instruction Manual TP3 - Z4-1 (Accessible only on bottom of A1 Main PCB) TP10 Top of R16 Top of VR3 Thru-hole TP11 S2A/N.O. S2D/Wiper (hole in AC Shield) Test Point Description VDD, +5.2V supply. VSS, -5.1V supply. VDG, digital supply, +3.15V ref. to VDD (TP7) VBG, bandgap ref., 1.2345V Supply ground.

  • Page 121: A/D Measurement Cycle

    Schematic Diagrams 50mS Shown, is the a/d measurement cycle for three readings: halfscale, fullscale and overrange (refer to Figure 4-3 and Section 4 for theory of operation). The three overlaid traces shown were made on a storage oscilloscope connected to U3-17 and triggered by TP6.
  • Page 122 8062A Instruction Manual...
  • Page 123 8062A Instruction Manual 8062A-1201 iu46c.eps Figure 7-5. A1 Main PCB Schmatic Diagram...
  • Page 124 8062A Instruction Manual 8060A-1003 iu61f.eps Figure 7-6. A3 RMS PCB Schmatic Diagram...

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