Fluke 78

  • Status: Obsolete, Discontinued

Overview of the Fluke 78 Digital Multimeter

The Fluke 78 digital multimeter is designed specifically for automotive and HVAC professionals, offering robust performance, accuracy, and durability. It combines a range of measurement functions with user-friendly features to meet the needs of technicians in these specialized fields.

Features of the Fluke 78

  • Automotive and HVAC Focused
  • Tailored for automotive and HVAC diagnostics.
  • Designed to handle common tasks in these industries efficiently.
  • Measurement Capabilities
  • Voltage: Measures both AC and DC voltage.
  • Current: Measures AC and DC current.
  • Resistance: Measures resistance, suitable for testing various components.
  • Frequency: Measures frequency for diagnostics.
  • Temperature: Equipped with a built-in thermometer for temperature measurements (optional thermocouple adapter).
  • User Interface
  • Large, easy-to-read digital display with backlight for use in dimly lit environments.
  • Simple and intuitive controls for ease of operation.
  • Robust Design
  • Rugged construction designed to withstand harsh working conditions.
  • Durable casing to protect against drops and rough handling.
  • Additional Automotive Features
  • Dwell Measurement: For checking the angle of ignition systems.
  • RPM Measurement: For measuring revolutions per minute in automotive applications.
  • Duty Cycle Measurement: Useful for diagnosing fuel injectors and other components.
  • Convenience Features
  • Min/Max Recording: Captures minimum and maximum values to identify intermittent problems.
  • Hold Function: Allows technicians to freeze the display for easy reading and recording.
  • Safety and Compliance
  • Meets industry safety standards for electronic measuring instruments.
  • Designed to ensure user safety in demanding automotive and HVAC environments.

Sure! Here’s the Fluke 78 digital multimeter specifications presented in table format:

Specification CategoryDetails
Measurement Functions
DC Voltage Range0 to 1000V
AC Voltage Range0 to 750V
DC Current Range0 to 10A
AC Current Range0 to 10A
Resistance Range0 to 40 MΩ
Frequency Range0.5 Hz to 200 kHz
Temperature Range-40°C to 260°C (-40°F to 500°F) with optional thermocouple adapter
DC Voltage Accuracy±(0.1% + 1 digit)
AC Voltage Accuracy±(1.0% + 2 digits)
DC Current Accuracy±(0.4% + 2 digits)
AC Current Accuracy±(1.5% + 2 digits)
Resistance Accuracy±(0.3% + 1 digit)
Frequency Accuracy±(0.1% + 1 digit)
Temperature Accuracy±(1% + 1 digit) with optional thermocouple adapter
Display TypeDigital LCD
Display Digits3.5 digits
Display Count2000 counts
Special Features
Dwell Measurement0 to 180 degrees, 4, 5, 6, and 8-cylinder engines
RPM Measurement0 to 9999 RPM
Duty Cycle0.1% to 99.9%
Min/Max RecordingCaptures minimum and maximum values
Hold FunctionFreezes the display for easy reading
Battery Type9V alkaline battery
Battery LifeApproximately 200 hours with alkaline battery
Environmental Specifications
Operating Temperature0°C to 50°C (32°F to 122°F)
Storage Temperature-40°C to 60°C (-40°F to 140°F)
Humidity<90% at 0°C to 35°C, <70% at 35°C to 50°C
Physical Specifications
Dimensions175 x 85 x 41 mm (6.9 x 3.3 x 1.6 inches)
Weight0.42 kg (0.93 lbs)
Safety and Compliance
Safety RatingCAT III 600V
ComplianceIEC 61010-1, ANSI/ISA-S82.01-1994
Fluke 78 Specifications

This table provides a clear and concise view of the Fluke 78 digital multimeter’s specifications.


The Fluke 78 digital multimeter is a versatile and durable tool tailored for automotive and HVAC professionals. Its specialized features, robust design, and user-friendly interface make it an essential instrument for diagnosing and repairing a wide range of systems in these industries.

NOTE: High performance test equipment may be worthy of repair and calibration even though it has been labeled obsolete and is discontinued.

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