Fluke 8062A User 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.

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
warranty extends only to the original buyer or end-user customer of a Fluke authorized
reseller, and does not apply to fuses, disposable batteries or to any product which, in
Fluke’s opinion, has been misused, altered, neglected or damaged by accident or
abnormal conditions of operation or handling. Fluke warrants that software will oper-
ate substantially in accordance with its functional specifications for 90 days and that it
has been properly recorded on non-defective media. Fluke does not warrant that
software will be error free or operate without interruption.
Fluke authorized resellers shall extend this warranty on new and unused products to
end-user customers only but have no authority to extend a greater or different warranty
on behalf of Fluke. Warranty support is available if product is purchased through a
Fluke authorized sales outlet or Buyer has paid the applicable international price.
Fluke reserves the right to invoice Buyer for importation costs of repair/replacement
parts when product purchased in one country is submitted for repair in another coun-
try.
Fluke’s warranty obligation is limited, at Fluke’s option, to refund of the purchase price,
free of charge repair, or replacement of a defective product which is returned to a
Fluke authorized service center within the warranty period.
To obtain warranty service, contact your nearest Fluke authorized service center or
send the product, with a description of the difficulty, postage and insurance prepaid
(FOB Destination), to the nearest Fluke authorized service center. Fluke assumes no
risk for damage in transit. Following warranty repair, the product will be returned to
Buyer, transportation prepaid (FOB Destination). If Fluke determines that the failure
was caused by misuse, alteration, accident or abnormal condition of operation or han-
dling, Fluke will provide an estimate of repair costs and obtain authorization before
commencing the work. Following repair, the product will be returned to the Buyer
transportation prepaid and the Buyer will be billed for the repair and return transporta-
tion charges (FOB Shipping Point).
THIS WARRANTY IS BUYER’S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU
OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT
LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR
A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL,
INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, IN-
CLUDING LOSS OF DATA, WHETHER ARISING FROM BREACH OF WARRANTY
OR BASED ON CONTRACT, TORT, RELIANCE OR ANY OTHER THEORY.
Since some countries or states do not allow limitation of the term of an implied war-
ranty, or exclusion or limitation of incidental or consequential damages, the limitations
and exclusions of this warranty may not apply to every buyer. If any provision of this
Warranty is held invalid or unenforceable by a court of competent jurisdiction, such
holding will not affect the validity or enforceability of any other provision.
Fluke Corporation Fluke Europe B.V.
P.O. Box 9090 P.O. Box 1186
Everett, WA 98206-9090 5602 BD Eindhoven
U.S.A. The Netherlands
5/94

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.
•Do not use the meter if the meter or test leads look damaged, or if you
suspect that the meter is not operating properly.
•Turn off power to the circuit under test before cutting, unsoldering, or
breaking the circuit. Small amounts of current can be dangerous.
•Do not apply more than 500V rms between a terminal and earth ground.
•Use caution when working above 60V dc or 30V ac rms. Such voltages
pose a shock hazard.
•When using the probes, keep your fingers behind the finger guards on
the probes.
•Disconnect the live test lead before disconnecting the common test lead.
Symbols
The following international symbols are used in this manual:
Important Safety Information in Manual
AC
DC
Diode Test
Ground
Fuse
Indicates Terminals At Which Dangerous Voltages May Exist
Battery

i
Table of Contents
Chapter Title Page
1 Introduction and Specifications............................................ 1-1
1-1. Introduction ............................................................................. 1-3
1-2. Specifications........................................................................... 1-4
2 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. Physical Features ..................................................................... 2-6
2-6. Front Panel........................................................................... 2-6
2-7. Display................................................................................. 2-8
2-8. Signal Input Limits .................................................................. 2-9
2-9. Operation ................................................................................. 2-10
2-10. Power-On Self-Test.............................................................. 2-10
2-11. AC/DC Voltage (V)............................................................. 2-11
2-12. True RMS Measurement.................................................. 2-11
2-13. AC-Coupled AC Measurements....................................... 2-12
2-14. Waveform Comparison and Conversion.......................... 2-13
2-15. High Impedance DC Voltage........................................... 2-14
2-16. AC/DC Current (A).............................................................. 2-15
2-17. Resistance (Ω)...................................................................... 2-18
2-18. Autoranging Megohms..................................................... 2-19
2-19. Autoranging Kilohms....................................................... 2-20
2-20. Diode Test (G)................................................................... 2-21
2-21. Relative (REL)..................................................................... 2-22
2-22. Continuity ( )........................................................... 2-25
2-23. Initial Check-Out Procedure.................................................... 2-25
3 Theory of Operation............................................................... 3-1
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

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Instruction Manual
ii
3-7. Current Measurement .......................................................... 3-9
3-8. Resistance Measurement...................................................... 3-10
3-9. Continuity Measurement ..................................................... 3-11
4 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. Disassembly and Reassembly.............................................. 4-5
4-6. Calibration and Backup Fuse Access............................... 4-6
4-7. Main PCB Access............................................................ 4-7
4-8. LCD and Microcomputer PCB Disassembly and
Assembly......................................................................... 4-8
4-9. Backup Fuse Replacement................................................... 4-11
4-10. Cleaning............................................................................... 4-11
4-11. Performance Tests ................................................................... 4-12
4-12. Initial Procedure.................................................................. 4-12
4-13. Microcomputer and Display Test......................................... 4-12
4-14. Voltage Test......................................................................... 4-13
4-15. Resistance Test.................................................................... 4-14
4-16. Continuity Test.................................................................... 4-15
4-17. Current Test......................................................................... 4-15
4-18. Diode Test ........................................................................... 4-17
4-19. Calibration Adjustments.......................................................... 4-17
4-20. Troubleshooting....................................................................... 4-19
4-21. Self-Tests............................................................................. 4-19
4-22. Ratio Self-Test................................................................. 4-19
4-23. Switch Decoding Self-Test.............................................. 4-20
4-24. Troubleshooting Guide........................................................ 4-21
5 List of Replaceable Parts....................................................... 5-1
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
6 Accessory Information .......................................................... 6-1
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. High Frequency Probe (83RF) ................................................ 6-7
6-8. High Frequency Probe (85RF) ................................................ 6-8
6-9. Current Shunt (80J-10)............................................................ 6-9
6-10. AC/DC Current Probe (Y8100)............................................... 6-9

Contents (continued)
iii
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
7 Schematic Diagrams.............................................................. 7-1

8062A
Instruction Manual
iv

v
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. Required Test Equipment ........................................................ 4-4
4-2. Voltage Test............................................................................. 4-13
4-3. Resistance Test......................................................................... 4-15
4-4. Current Test ............................................................................. 4-16
4-5. Switch Decoding Self-Test ...................................................... 4-21
4-6. Troubleshooting Guide............................................................ 4-22
4-7. Troubleshooting the Resistance Function: Voltage Sources
for Ranges................................................................................ 4-26
4-8. U3 (MAC) Pin Descriptions.................................................... 4-26
5-1. 8062A Final Assembly............................................................. 5-5
5-2. A1 Main PCB Assembly.......................................................... 5-9
5-3. A3 RMS PCB Assembly.......................................................... 5-13
6-1. Cables and BNC, Banana, Phone and Phono Plug Adapters... 6-12

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Instruction Manual
vi

vii
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........................................ 2-12
2-8. Multiplication Factors for Converting Waveforms.................. 2-13
2-9. High Impedance DC Voltage................................................... 2-14
2-10. Current Operation.................................................................... 2-16
2-11. Calculating Burden Voltage Error ........................................... 2-18
2-12. Resistance Operation ............................................................... 2-18
2-13. Selection of Autoranging Kilohms........................................... 2-21
2-14. Diode Test................................................................................ 2-21
2-15. Relative (REL) Operation........................................................ 2-22
2-16. Continuity ( ) Operation .................................................. 2-26
3-1. 8062A Block Diagram............................................................. 3-4
3-2. Analog Portion of the A/D Converter...................................... 3-7
3-3. A/D Measurement Cycle.......................................................... 3-7
3-4. Voltage Measurement.............................................................. 3-8
3-5. Current Measurement............................................................... 3-10
3-6. Resistance/Continuity Measurement........................................ 3-11
4-1. Calibration and Backup Fuse (F2) Access............................... 4-7
4-2. Assembling/Disassembling the Microcoputer PCB and LCD.. 4-9
4-3. Disassembling the LCD ........................................................... 4-10
4-4. General Equipment Connection............................................... 4-14
4-5. Equipment Connection for Current Test.................................. 4-16
5-1. 8062A Final Assembly............................................................. 5-7
5-2. A1 Main PCB Assembly.......................................................... 5-12
5-3. A3 RMS PCB Assembly.......................................................... 5-14
6-1. Accessories .............................................................................. 6-4
7-1. A1 Main PCB Component Locations (TopView).................... 7-3
7-1. A1 Main PCB Component Locations (Bottom View) ............. 7-3
7-2. Test Point Locations ................................................................ 7-4
7-3. A/D Measurement Cycle.......................................................... 7-5
7-4. Switch Detail............................................................................ 7-6

8062A
Instruction Manual
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7-5. A1 Main PCB Schematic Diagram.......................................... 7-7
7-6. A3 RMS PCB Schematic Diagram.......................................... 7-8

1-1
Chapter 1
Introduction and Specifications
Contents Page
1-1. Introduction...................................................................... 1-3
1-2. Specifications ................................................................... 1-4

8062A
Instruction Manual
1-2

Introduction and Specifications
Introduction
1
1-3
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. New features include the
following:
•True rms measurements for ac signals up to 30 kHz.
•Resistance measurements up to 300 MΩ.
•Ability to store any input signal as an offset or relative reference value.
Other features include:
•FUNCTIONS:
Standard DMM measurement functions, such as ac and dc volts and ac
and dc current, as well as resistance, continuity, and diode test.
•RANGES:
Leading zero suppression.
Automatic polarity.
Overrange indication.
Protection from overloads and transients up to 1500V peak.
Dual-slope integration a/d conversion to ensure noise-free
measurements.
Autoranging MΩresistance range (to 300 MΩ), as well as four fixed
resistance ranges from 200Ωto 200 kΩ.
•OPERATOR CONVENIENCE:
4-1/2 digit Liquid Crystal Display.
Software-control self-test routines for quick verification of internal
circuitry and operation.
•POWER:
170 hours of continuous operation can be expected from a 9V alkaline
battery (NEDA 1604).

8062A
Instruction Manual
1-4
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. The accessories are listed in Table 1-1 and described in Chapter 6.
Table 1-1. 8062A Accessories
Model No.* Description
A81
C-90
80T-150C
80T-150F
80I-600
80K-6
80K-40
80J-10
83RF
85RF
Battery Eliminator
Vinyle Carrying Case
Temperature Probe °C
Temperature Probe °F
Current Transformer 2’ jaws
High Voltage Probe (6 kV)
High Voltage Probe (40 kV)
Current Shunt
High Frequency Probe (100 MHz)
High Frequency Probe (500 MHz)
*BNC, banana plug, phone and phono adapters are also abaialbe as
accessories and are listed in Section 6.
1-2. Specifications
The specifications for the 8062A are listed in Table 1-2.

Introduction and Specifications
Specifications
1
1-5
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
Range Resolution Accuracy
±(% of reading + no. of digits)
200 mV
2V .01 mV .1 mV 0.05% + 2
20V
200V
1000V
1 mV
10 mV
100 mV 0.07% + 2
Response Time.............................. 1 second maximum, to rated
accuracy within selected range.
Input Impedance............................ 10 MΩshunted by >100 pf
Normal Mode Noise Rejection....... >60 dB at 50 Hz or 60 Hz
Common Mode Noise Rejection .... >120 dB at dc, >90 dB at 50 Hz and
60 Hz (1 kΩimbalance)
Overload Protection....................... 1000V dc or peak ac continuous,
except 20 seconds maximum on 200
mV and 2V ranges above 300V dc or
rms.
DC Voltage, High Impedance Mode
All specifications are the same as for the dc voltage mode except the
following (only 200 mV and 2V ranges are available):
Range Resolutions Accuracy
±(% of reading + no. of digits)
200 mV
2V .01 mV .1 mV 0.06% + 2
Input Impedance............................ >1000 MΩ, typically 10,000 MΩ
Overload Protection....................... 300V dc or rms continuous, 20
seconds maximum 300V to 1000V dc
or peak ac.

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Instruction Manual
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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
Voltage Resolution Range 20 Hz - 45 Hz 45 Hz - 500 Hz 500 Hz - 10 kHz 10 kHz - 30 kHz
20.0 -
199.99 mV .01 mV 200 mV 0.5% + 20 1% + 40
.2000 -
1.9999V .1 mV 2V 1% +10
2.000 -
19.999V 1 mV 20V 0.5% +12 5% +20 5% +40
20.00 -
199.99V 10 mV 200V
75.0 -
499.9V 100 mV 750V Not Specified 1% +10 Not Specified
500.0 -
750.0V 2% +10
* Not specified for input < 10% of range. 1 kHz
Input Impedance......................... 10 MΩshunted by <100 pF
Common Mode Noise
Rejection..................................... >60 dB at 50 Hz and 60 Hz (1 kΩ
imbalance)
Crest Factor Range..................... 1:1 to 3:1
Response Time........................... Five seconds maximum to rated
accuracy within selected range, 12
seconds to rated accuracy from an
overload.
Overload Protection.................... 750V rms or 1000V peak continuous
except 20 seconds maximum on the
200 mV range above 300V rms or
300V dc. Input not to exceed a volt-
hertz product of 1x107(for example,
200V at 50 kHz).

Introduction and Specifications
Specifications
1
1-7
Table 1-2. 8062A Specifications (cont)
Resistance
Ranges...................................... 200Ω, 2 kΩ, 20 kΩ, 200 kΩ, autoranging
MΩ. The MΩrange extends from .0001
mΩto 300 MΩin three autoranged
ranges. Upscale range changes are
made at 2 MΩand 20 MΩ. Downscale
range changes are made at 19 MΩand
1.9 MΩ.
Accuracy................................... ±(% of reading + no. of digits). See table
below.
Range Reso-
lution Accuracy Full-
scale
Voltage
Max
Current
Open
Circuit
Voltage
200Ω0.01Ω(0.1%+2+.02Ω) <1.1 mA <4.8V
2 kΩ0.1Ω(0.1%+2) <250 mV <150 µA
20 kΩ1Ω(0.1%+2) <15 µA <1.5V
200 kΩ10Ω(0.1%+2) <1.5 µA
0-1.9999 MΩ100Ω(0.2%+2)
MΩ2-19.99 MΩ10 kΩ(0.25%+3) <2.5 µA
20-99.9 MΩ100 kΩ(1%+3) <2.5V <2.5V
100-300 MΩ1 MΩ(2%+3)
Autoranging kΩ0.1Ω
to 1 kΩ(.20%+5) <1.0 mA
Response Time.............................. Two seconds maximum to rated
accuracy for all ranges except MΩ.
For MΩ, 8 seconds maximum.
Overload Protection....................... 300V dc or rms ac for all ranges

8062A
Instruction Manual
1-8
Table 1-2. 8062A Specifications (cont)
Continuity
Ranges........................................... All resistance ranges
Threshold....................................... Nominally <50% of range (for
example, 100Ωin the 200Ωrange)
for 200Ω, 2 kΩ, 20 kΩ, 200 kΩ
ranges. Nominally <100 kΩin
autoranging kΩ.
Display Indication........................... Horizontal bar across the top of the
display and/or 2.667 kHz tone.
Indication is present for a minimum of
200 ms.
Response Time.............................. 50 µs maximum (10 µs typical)
Overload Protection....................... 300V dc or rms ac
Diode Test
Range ............................................ 2V
Test Current................................... 1 mA (typical)
Accuracy........................................ ±(0.06% of reading + 2 digits)
(Specification applies for voltage
measurement)
Response Time.............................. 1 seconds maximum
Overload Protection....................... 300V dc or rms ac
DC Current
Range Resolution Accuracy
±(% of reading + no. of digits) Burden Voltage
200 µA
2 mA
20 mA
.01 µA
.1 µA
1 µA0.3% + 2 .3V typical
.3V typical
.3V typical
200 mA
2000 mA 10 µA 100 µA0.7% + 2 .3V typical .9V typical
Overload Protection....................... 2A/250V fuse (operator replaceable)
in series with 3A/600V fuse (service
personnel replaceable).