Equipment information

Fluke 78 Digital multimeter
Manufacturer:
Model:
78
Date:
1998
Category:
Group:
Description:
Automotive Multimeter

Information

Maximum Voltage Between any Terminal and Earth Ground 300 V Fuse Protection 15 A 600 V FAST Fuse Display Digital: 4000 counts, updates 4/s Bar Graph: 64 segments, update rate 40/s Frequency: 9,999 counts, updates 3/s Operating Temperature 0°C to 55°C (32°F to 131°F) Storage Temperature 40°C to 60°C (40°F to 140°F) Temperature Coefficient 0.1 x (specified accuracy) per °C ambient (<18°C or >28°C). Temperature, 0.04% + 0.1°C per °C Relative Humidity 0% to 95%, to 30°C (86°F) 0% to 75%, to 40°C (104°F) 0% to 45%, to 55°C (131°F) Altitude Electromagnetic Compatibility 2000 meters maximum In an RF field of 1 V/m on all ranges and functions: Total Accuracy = Specified Accuracy +0.7% or range Performance above 1 V/m is not specified. Battery Type 9 V, NEDA 1604 or 6F22 or 006P Battery Life Alkaline: 500 hrs (typical) Carbonzinc: 300 hrs (typical) Continuity Beeper 4096 Hz Shock, Vibration Per MILT28800E for a Type III, Class 3 Style D, Instrument Size (HxWxL) 1.12 in x 2.95 in x 6.55 in (2.8 cm x 7.5 cm x 16.6 cm) Weight 12 oz (340g) Safety Complies with EN 610101:1993, ANSI/ISA S82.011994 and CAN/CSA C22.2 No. 1010.192 Overvoltage Category II. Safety Approvals CSA Certified, TUV Product Service licensed, UL EMI Regulation Complies with FCC Part 15, Class B, VDE 0871B, Vfg. 2431991 Inductive Pickup Input: Magnetic field from spark plug Output: Pulse to trigger Fluke 78 Thermocouple Type: K (Chromel vs. Alumel) (Fluke 80PK1) Not suitable for immersion in liquid. Accuracy: ±1.1°C (2°F) between 0°C to 260°C (32°F-500°F). Typically within 1.1°C (2°F) of NBS tables for temperatures between 40°C (40°F) to 0°C (32°F). Temperature Range: 40°C to 260°C. (40°F to 500°F). Above 260°C (500°F), toxic gas might be emitted. NOTE: The temperature range is primarily a function of the thermal limitations of the thermocouple's insulation. Cable Insulation: Teflon MIN MAX Recording Accuracy: Specified accuracy of measurement function ±16 digits for changes > 200 ms in duration (±52 digits in 400 J). Nominal response time (5 to 100% of range) 100 ms to 80%

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Service Manual
Manual Type:
Service Manual
Pages:
64
Size:
2.34 Mbytes (2458481 Bytes)
Language:
english
Revision:
Manual-ID:
PN 666617
Date:
Quality:
Electronic document, no scan, very well readable.
Upload date:
2014 11 30
MD5:
d1f416102be2602125950960076ae66b
Downloads:
902

Information

For IEC 61010 CAT II Meters Only Introduction This Service Manual provides information on maintaining, troubleshooting, and repairing the Fluke 78 Automotive Meter. This information includes the following: · Specifications · Theory of operation · Calibration · Performance testing and troubleshooting procedures · Replacement parts lists · Schematic diagrams A meter under warranty will be promptly repaired or replaced (at Fluke’s option) and returned at no charge. See the registration card for warranty terms. If the warranty has expired, the meter will be repaired and returned for a fixed fee. Contact the nearest Service Center for information and prices. A list of U.S. and International Fluke telephone numbers is included at the end of Chapter 4 of this manual. 1-2. Organization of the Service Manual This service manual has the following five chapters. Chapter 1. Introduction and Specifications Chapter 1 describes the Service Manual, explains special terminology and conventions, and provides complete meter specifications. Chapter 2. Theory of Operation Chapter 2 treats the meter’s circuitry as 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 explain operation to the component level and support the troubleshooting and repair procedures in Chapter 3. Chapter 3. Maintenance Chapter 3 provides maintenance information, detailed repair procedures to the component level, and performance tests. Troubleshooting and repair procedures rely on the Theory of Operation presented in Chapter 2 and the Schematic Diagrams in Chapter 5. Chapter 4. List of Replaceable Parts Chapter 4 provides parts lists and information on how and where to order parts. Chapter 5. Schematic Diagrams Chapter 5 provides schematic diagrams for all assemblies and a list of mnemonic definitions to aid in identifying signal name abbreviations. 1-3. Conventions The following conventions are used in this manual: · Printed Circuit Assembly (PCA) A "pca" is a printed circuit board and its attached parts. · Circuit Nodes A pin or connection on a component is specified by a dash (-) and number following the component reference designator. For example, pin 19 of U30 would be U30-19. · User Notation Switch positions, input terminals, and display annunciators are usually shown as they appear on the meter. Mnemonics used in the meter circuit descriptions correspond to those on the schematic diagrams in Chapter 5. 1-4. Specifications Specifications for the Fluke 78 are in Table 1-1. Accuracy is specified for a period of one year after calibration, at 18°C to 28°C (64°F to 82°F) with relative humidity to 95%. AC conversions are ac-coupled, average responding, and calibrated to the rms value of a sine wave input. Accuracy Specifications are given as: ±([% of reading] + number of least significant digits)

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