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                                    Maximum Voltage Between any
Terminal and Earth Ground
Rated voltage
Display Digital: 3,200 counts, updates 2.5/sec
Analog: 31 segments, updates 25/sec
Response Time of Digital Display V ac < 2 s
V dc < 1 s
W < 1s to 320 kW, < 2s to 3.2 MW,
< 10 s to 32 MW
Operating Temperature 0°C to 50°C
Storage Temperature -40°C to 60°C
Temperature Coefficient 0.1 x (specified accuracy)/°C
(<18°C or >28°C)
Electromagnetic Compatibility In
RF field of 3 V/m on all functions.
Total accuracy = Specified accuracy
+ 0.1% of range.
Relative Humidity
except 32 MW range
32 MW range only
0% to 90% (0°C to 35°C)
0% to 70% (35°C to 50°C)
0% to 80% (0°C to 35°C)
0% to 70% (35°C to 50°C)
Altitude Operating: 2000 meters
Storage: 12,000 meters
Battery Type 9 V NEDA 1604 or 6F22 or 006P,
or NEDA 1604A or 6LR61
Battery Life 2000 hrs typical with alkaline
1600 hrs typical with carbon zinc
Continuity Beeper 4096 Hz
Shock, Vibration per MIL-T-PRF 28800F Class III, Sinusoidal,
Non Operating
Size (H x W x L) 3.7 cm x 8.9 - 7.8 cm x 19 cm
(1.5 in x 3.5 - 3.1 in x 7.49 in)
Weight 365 g (12.9 oz)
Safety 600 V CAT III and 1000 V CAT II per
ANSI/ISA S82.01-1994, EN 61010-1: 1993,
CSA C22.2 No 1010.1-92, UL 3111-1.
EMC Regulations EN 61326-1 1997.

This manual presents service information for the Fluke 77 Series III
Multimeter. The manual includes a theory of operation, general maintenance
procedures, performance tests, calibration procedures, troubleshooting
information, a list of replaceable parts, and schematic diagrams.

The following descriptions briefly describe each chapter in the manual.
Chapter 1 Introduction and Specifications
This chapter describes use of the Service Manual and application of special
terminology (conventions) to describe the meter’s circuitry. A complete set of
specifications appears at the end of this chapter.
Chapter 2 Theory of Operation
This chapter first categorizes instrument circuitry into functional blocks, with
a description of each block’s role in overall operation. A detailed circuit
description is then given for each block. These descriptions explore operation
to the component level and fully support troubleshooting and repair
procedures defined in Section 3.
Chapter 3 Maintenance
Provides complete maintenance information, from general maintenance and
cleaning instructions to detailed troubleshooting and repair procedures to the
component level. Troubleshooting and repair procedures rely heavily on both
the Theory of Operation presented in Chapter 2 and the Schematic Diagrams
shown in Section 5.
Chapter 4 List of Replaceable Parts
Includes parts lists for all standard assemblies. Information on how and where
to order parts is also provided.
Chapter 5 Schematic Diagrams
Includes schematic for the A1 Main PCA.

This manual presents service information for the Fluke 77 Series III
Multimeter. The manual includes a theory of operation, general maintenance
procedures, performance tests, calibration procedures, troubleshooting
information, a list of replaceable parts, and schematic diagrams.

This manual presents service information for the Fluke 77
Series III
Multimeter. The manual includes a theory of operation,
general maintenance
procedures, performance tests, calibration procedures,
troubleshooting
information, a list of replaceable parts, and schematic
diagrams.


The following descriptions briefly describe each chapter in
the manual.
Chapter 1 Introduction and Specifications
This chapter describes use of the Service Manual and
application of special
terminology (conventions) to describe the meter’s circuitry.
A complete set of
specifications appears at the end of this chapter.
Chapter 2 Theory of Operation
This chapter first categorizes instrument circuitry into
functional blocks, with
a description of each block’s role in overall operation. A
detailed circuit
description is then given for each block. These descriptions
explore operation
to the component level and fully support troubleshooting and
repair
procedures defined in Section 3.
Chapter 3 Maintenance
Provides complete maintenance information, from general
maintenance and
cleaning instructions to detailed troubleshooting and repair
procedures to the
component level. Troubleshooting and repair procedures rely
heavily on both
the Theory of Operation presented in Chapter 2 and the
Schematic Diagrams
shown in Section 5.
Chapter 4 List of Replaceable Parts
Includes parts lists for all standard assemblies.
Information on how and where
to order parts is also provided.
Chapter 5 Schematic Diagrams
Includes schematic for the A1 Main PCA.

The following descriptions briefly describe each chapter in
the manual.
Chapter 1 Introduction and Specifications
This chapter describes use of the Service Manual and
application of special
terminology (conventions) to describe the meter’s circuitry.
A complete set of
specifications appears at the end of this chapter.
Chapter 2 Theory of Operation
This chapter first categorizes instrument circuitry into
functional blocks, with
a description of each block’s role in overall operation. A
detailed circuit
description is then given for each block. These descriptions
explore operation
to the component level and fully support troubleshooting and
repair
procedures defined in Section 3.
Chapter 3 Maintenance
Provides complete maintenance information, from general
maintenance and
cleaning instructions to detailed troubleshooting and repair
procedures to the
component level. Troubleshooting and repair procedures rely
heavily on both
the Theory of Operation presented in Chapter 2 and the
Schematic Diagrams
shown in Section 5.
Chapter 4 List of Replaceable Parts
Includes parts lists for all standard assemblies.
Information on how and where
to order parts is also provided.
Chapter 5 Schematic Diagrams
Includes schematic for the A1 Main PCA.

The following descriptions briefly describe each chapter in
the manual. Chapter 1 Introduction and Specifications
This chapter describes use of the Service Manual and
application of special terminology (conventions) to describe
the meter’s circuitry. A complete set of specifications
appears at the end of this chapter.
Chapter 2 Theory of Operation
This chapter first categorizes instrument circuitry into
functional blocks, with a description of each block’s role
in overall operation. A detailed circuit description is then
given for each block. These descriptions explore operation
to the component level and fully support troubleshooting and
repair procedures defined in Section 3.
Chapter 3 Maintenance
Provides complete maintenance information, from general
maintenance and cleaning instructions to detailed
troubleshooting and repair procedures to the component
level. Troubleshooting and repair procedures rely heavily on
both the Theory of Operation presented in Chapter 2 and the
Schematic Diagrams shown in Section 5.
Chapter 4 List of Replaceable Parts
Includes parts lists for all standard assemblies.
Information on how and where to order parts is also provided.
Chapter 5 Schematic Diagrams Includes schematic for the A1
Main PCA.