Fluke 8060A User manual

®
This manual pertains to instruments with serial number 6820XXX
or higher.
8060A
True-rms Multimeter
Instruction Manual
PN 609146
May 1997 Rev.3, 11/00
© 1997,1998,1999, 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 operate
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 country.
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
handling, 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
transportation 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,
INCLUDING 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
warranty, 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 manual, 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. Items Furnished with Equipment............................................. 1-4
1-3. Specifications........................................................................... 1-4
2 Operating 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 .................................................... 2-12
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).............................................................. 2-16
2-17. Resistance (Ω)...................................................................... 2-18
2-18. Autoranging Megohms .................................................... 2-20
2-19. Autoranging Kilohms....................................................... 2-21
2-20. Conductance (S)................................................................... 2-22
2-21. Diode Test ( )................................................................... 2-25
2-22. Relative (REL)..................................................................... 2-27
2-23. Frequency (Hz).................................................................... 2-29
2-24. Decibel (dB)......................................................................... 2-32
2-25. dBV...................................................................................... 2-33
2-26. Continuity ( )........................................................... 2-34
2-27. Initial Check-Out Procedure.................................................... 2-36

8060A
Instruction Manual
ii
3 Applications............................................................................. 3-1
3-1. Introduction .............................................................................. 3-3
3-2. Determining Amplifier Bandwidth........................................... 3-3
3-3. Using the 8060A as a Q-Meter................................................. 3-4
3-4. Measuring Amplifier Stage Gain with Relative dB.................. 3-5
3-5. General Audio Uses.................................................................. 3-6
3-6. Using the 8060A to Measure Extremely Low Currents ........... 3-7
3-7. Making dBm or dBW Measurements with Other Reference
Impedances............................................................................... 3-7
3-8. Changing AC dB Reference Impedances with a DC Source.... 3-9
4 Theory of Operation ................................................................ 4-1
4-1. Introduction .............................................................................. 4-3
4-2. Functional Description ............................................................. 4-3
4-3. Microcomputer ..................................................................... 4-4
4-4. Measurement Acquisition Chip (MAC) ............................... 4-5
4-5. A/D Conversion Cycle ......................................................... 4-6
4-6. Voltage Measurement........................................................... 4-8
4-7. Current Measurement........................................................... 4-10
4-8. Resistance Measurement ...................................................... 4-10
4-9. Conductance Measurement................................................... 4-11
4-10. Continuity Measurement ...................................................... 4-12
4-11. Frequency Measurement ...................................................... 4-13
5 Maintenance............................................................................. 5-1
5-1. Introduction .............................................................................. 5-3
5-2. Service Information.................................................................. 5-3
5-3. General Information ................................................................. 5-4
5-4. Handling Precautions for Using Static Sensitive Devices.... 5-5
5-5. Disassembly and Reassembly............................................... 5-5
5-6. Calibration and Backup Fuse Access ............................... 5-6
5-7. Main PCB Access............................................................. 5-8
5-8. LCD and Microcomputer PCB Disassembly and
Assembly.......................................................................... 5-9
5-9. Backup Fuse Replacement.................................................... 5-12
5-10. Cleaning................................................................................ 5-12
5-11. Performance Tests .................................................................... 5-13
5-12. Initial Procedure ................................................................... 5-13
5-13. Microcomputer and Display Test......................................... 5-13
5-14. Voltage Test.......................................................................... 5-13
5-15. Resistance Test..................................................................... 5-15
5-16. Continuity Test..................................................................... 5-16
5-17. Conductance Test ................................................................. 5-16
5-18. Current Test.......................................................................... 5-17
5-19. Diode Test ............................................................................ 5-18
5-20. Frequency Test ..................................................................... 5-18
5-21. Calibration Adjustment............................................................. 5-19
5-22. Troubleshooting........................................................................ 5-21

Contents (continued)
iii
5-23. Self-Tests............................................................................. 5-21
5-24. Ratio Self-Test................................................................. 5-21
5-25. Switch Decoding Self-Test.............................................. 5-22
5-26. Troubleshooting Guide ........................................................ 5-23
6 List of Replaceable Parts........................................................ 6-1
6-1. Introduction.............................................................................. 6-3
6-2. How to Obtain Parts................................................................. 6-3
6-3. Manual Status Information ...................................................... 6-4
6-4. Newer Instruments................................................................... 6-4
6-5. Service Centers........................................................................ 6-4
7 Schematic Diagrams ............................................................... 7-1

8060A
Instruction Manual
iv

v
List of Tables
Table Title Page
1-1. 8060A Specifications............................................................... 1-5
2-1. Controls, Indicators and Connectors........................................ 2-7
2-2. Input Overload Limits.............................................................. 2-10
2-3. Resistance Function Autoranges and Resolution..................... 2-20
2-4. Frequency Function Autoranges and Resolution..................... 2-30
2-5. Sensitivity for the Frequency Function.................................... 2-31
2-6. Maximum Input Voltages for the Frequency Function............ 2-31
3-1. Equivalent Voltage Levels for Modifying the Reference
Impedance................................................................................ 3-8
4-1. Voltage Input Divider.............................................................. 4-10
5-1. Required Test Equipment ........................................................ 5-4
5-2. Voltage Test............................................................................. 5-14
5-3. Resistance Test ........................................................................ 5-16
5-4. Current Test ............................................................................. 5-18
5-5. Frequency Test......................................................................... 5-18
5-6. Switch Decoding Self-Test...................................................... 5-23
5-7. Troubleshooting Guide............................................................ 5-24
5-8. Troubleshooting the Resistance Function: Voltage Sources
for Ranges................................................................................ 5-29
5-9. U3 (MAC) Pin Descriptions .................................................... 5-29
6-1. 8060A Final Assembly ............................................................ 6-5
6-2. A1 Main PCB Assembly.......................................................... 6-9
6-3. A3 Rms PCB Assembly........................................................... 6-13

8060A
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. 8060A Display......................................................................... 2-8
2-5. Overrange Indicator................................................................. 2-9
2-6. Voltage Operation.................................................................... 2-11
2-7. AC and DC Wafeform Components........................................ 2-13
2-8. Multiplication Factors for Converting Waveforms.................. 2-14
2-10. Current Operation .................................................................... 2-17
2-11. Calculating Burden Voltage Error ........................................... 2-18
2-12. Resistance Operation ............................................................... 2-19
2-13. Selection of Autoranging Kilohms .......................................... 2-22
2-14. Conductance Operation............................................................ 2-23
2-15. Conductance/Resistance Conversion....................................... 2-24
2-16. Diode Test................................................................................ 2-25
2-17. Relative (REL) Operation........................................................ 2-26
2-18. Frequency (Hz) Operation....................................................... 2-29
2-19. Decibel (dB) Operation............................................................ 2-33
2-20. Continuity ( ) Operation ................................................... 2-35
3-1. Measuring Amplifier Bandwidth............................................. 3-4
3-2. Measuring Q with the 8060A................................................... 3-6
3-3. Measuring Stage Gain with Relative dB.................................. 3-6
4-1. 8060A Block Diagram............................................................. 4-4
4-2. Analog Portion of the A/D Converter...................................... 4-7
4-3. A/D Measurement Cycle.......................................................... 4-7
4-4. Voltage Measurement.............................................................. 4-9
4-5. Current Measurement............................................................... 4-11
4-6. Resistance/Conductance/Continuity Measurement.................. 4-12
4-7. Frequency Measurement.......................................................... 4-13
5-1. Calibration and Backup Fuse (F2) Access) ............................. 5-7
5-2. Assembling/Disassembling the Microcomputer PCB and
LCD ......................................................................................... 5-10
5-3. Disassembling the LCD........................................................... 5-11
5-4. General Equipment Connection............................................... 5-15
5-5. Equipment Connection for Current Test.................................. 5-17
6-1. 8060A Final Assembly ............................................................ 6-7

8060A
Instruction Manual
viii
6-2. A1 Main PCB Assembly .......................................................... 6-12
6-3. A3 Rms PCB Assembly ........................................................... 6-14
7-1. A1 Main PCB Component Locations....................................... 7-3
7-2. Test Point Locations................................................................. 7-4
7-3. A/D Measurement Cycle.......................................................... 7-5
7-4. Switch Detail............................................................................ 7-6
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. Items Furnished with Equipment...................................... 1-4
1-3. Specifications ................................................................... 1-4

8060A
Instruction Manual
1-2

Introduction and Specifications
Introduction
1
1-3
1-1. Introduction
Your Fluke Model 8060A is a handheld, microcomputer-based 4½ digit
multimeter that is ideally suited for use in the field, laboratory, shop, or
home. The 8060A 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 100 kHz.
•Frequency measurements up to 200 kHz.
•Voltage measurements in dBm referenced to 600Ωor in dB relative to
an operator-selected reference voltage.
•Resistance measurements up to 300 MΩ.
•Ability to store any input signal as an offset or relative reference value.
Other features include:
•Functions:
All standard DMM measurement functions, such as ac and dc volts and
ac and dc current, as well as resistance, conductance, 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:
4½ digit Liquid Crystal Display.
Software-controlled self-test routines for quick verification of internal
circuitry and operation.

8060A
Instruction Manual
1-4
•Power:
170 hours of continuous operation can be expected from a 9V alkaline
battery (NEDA 1604).
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
8060A.
1-2. Items Furnished with Equipment
Items shipped with your True rms Multimeter are as follows:
•Battery
•DMM Accessory List
•Instruction Manual
•Operator Guide Card
•Registration Form
•Statement of Calibration
•Test Leads
1-3. Specifications
The specifications for the 8060A are listed in Table 1-1.

Introduction and Specifications
Specifications
1
1-5
Table 1-1. 8060A 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 80%.
DC Voltage
Range Resolution Accuracy
±(% of reading + no. of digits)
200 mV
2V .01 mV .1 mV 0.04% + 2
20V
200V
1000V
1 mV
10 mV
100 mV 0.05% + 2
Response Time............................. 1 second maximum, to rated
accuracy within selected range.
Input Impedance ........................... 10 MΩnominal
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 0.05% + 2
Input Impedance ........................... >1,000 MΩ, typically 10,000 MΩ
Overload Protection ...................... 300V dc or rms continuous, 20
seconds maximum 300V to
1000V dc or peak ac.

8060A
Instruction Manual
1-6
Table 1-1. 8060A Specifications (cont)
DC Voltage, dB Mode
Measurements are made in dBm referenced to 600Ωor relative dB. All
specifications are the same as for dc voltage except the following:
Dynamic Range............................. With full .01 dB resolution, 99.79
dB. Total specified dynamic
range is 136.22 dB (160 µV to
1000V).
Resolution and Accuracy .............. Depends on linear dc count
(count refers to the display in dc
volts independent of the decimal
points - see table below).
Accuracy
dBm Ref. 600ΩRange Tolerance
-74 to -56
(160 µV to 1.27 mV) 200 mV ±1 dB
-55.6 to -37.6
(1.28 mV to 10.23 mV) 200 mV ±.2 dB
-37.58 to -31.77
(10.24 mV to 19.99 mV) 200 mV ±.04 dB
-31.76 to -11.76
(20 mV to 199.99 mV) 200 mV ±.04 dB
-11.76 to 8.24
(.2V to 1.9999V) 2V ±.04 dB
8.24 to 28.24
(2.000V to 19.999V) 20V ±.04 dB
28.24 to 48.24
(20.00V to 199.99V) 200V ±.04 dB
48.24 to 62.22
(200.0V to 1000V) 1000V ±.04 dB
Linear Counts Resolution Accuracy
19.999 to 1024
1023 to 128
127 to 16
.01 dB
.1 dB
1 dB
±.04 dB
±.2 dB
±1 dB

Introduction and Specifications
Specifications
1
1-7
Table 1-1. 8060A 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 Reso- lution Range 20 Hz - 45 Hz 45 Hz - 1 kHz 1 kHz - 10 kHz 10 kHz - 30 kHz 30 kHz - 50 kHz 50 kHz - 100 kHz
20.0 -
199.99 m
V
.01 mV 200 mV 0.2%
+ 12 0.2% + 20 0.5% + 40 1% + 100
.2000 -
1.9999V .1 mV 2V 1% + 10
3% +200**
2.000 -
19.999V 1 mV 20V 0.5% +12 0.5% +20 1% +40 2% +100
20.00 -
199.99V 10 mV 200V
75.0 -
4.99.9V 100 mV 750V Not Not Specified
500.0 -
750.0V
Specified 1%
+12
* Not specified for input signals <10% of range.
** For input voltage between 10% and 15% of range, add an additional 140 counts.
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
107(for example, 200V at 50 kHz).

8060A
Instruction Manual
1-8
Table 1-1. 8060A Specifications (cont)
AC Voltage, dB Mode (True rms, AC-Coupled)
Measurements are made in dBm referenced to 600Ωor relative dB. All
specifications are the same as for ac voltage except the following:
Dynamic Range... With full .01 dB resolution, 97.30 dBm. Total specified
dynamic range is 109.72 dBm (2.45 mV to 750.0V ac
rms).
Resolution ........... Depends on number of linear ac counts (count refers
to the actual number on the display independent of
the decimal point. See table below).
Linear Counts* Resolution
19.999 to 1024
1023 to 128
127 to 16
.01 dB
.1 dB
1 dB
*Not specified below 245 counts.
Accuracy................. See table below:
dBm Ref. 600ΩRange 20 Hz -
45 Hz** 45 Hz - 10 kHz** 10 kHz - 30 kHz** 30 kHz - 50 kHz** 50 kHz - 100 kHz**
-50.0 to -31.76
(2.45 mV to 20.00 mV) 200 mV Not Specified
-31.76 to -29.83
(20.00 mV to 25.00 mV) 200 mV 0.20 dB 0.50 dB 1.00 dB 2.70 dB
-29.83 to -11.76
(25.00 mV to 199.99 mV) 200 mV 0.10 dB 0.15 dB 0.30 dB 0.50 dB
-11.76 to 8.24
(.2000V to 1.9999V) 2V
0
.10 dB*0.10 dB* 0.15 dB* 0.30 dB* 0.50 dB*
8.24 to 28.24
(2.000V to 19.999V) 20V
28.24 to 48.24
(20.00V to 199.99V) 200V 0.15 dB 0.30 dB 0.30 dB 0.65 dB 1.83 dB
48.24 to 59.72 750V
20 Hz -
1 kHz** 1 kHz - 100 kHz**
(200.0V to 750.0V) 0.5 dB Not Specified
*Specification applies above 8000 linear counts.
**Not specified for input signals <10% of range.