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General| DC Voltage Range | 200 mV to 1000 V |
|---|---|
| AC Voltage Range | 200 mV to 750 V |
| Resistance Range | 200 Ω to 20 MΩ |
| Input Impedance | 10 MΩ |
| Operating Temperature | 0°C to 50°C |
| DC Current Range | 200 μA to 2 A |
| AC Current Range | 200 μA to 2 A |
Procedure for shipping instruments for repair or adjustment, including packaging and carrier recommendations.
Instructions for handling claims related to shipping damage upon initial delivery of the instrument.
Overview of the John Fluke Model 8050A portable digital multimeter and its features.
Information on available accessories to enhance the 8050A's capabilities and options.
Detailed electrical and environmental specifications for the 8050A instrument.
Guide to setting up and operating the 8050A multimeter for various measurements.
Instructions for unpacking, handling, and preparing the 8050A for initial use.
Information on the required AC line voltage and a caution regarding connection.
Procedure for replacing the user-replaceable fuse (F1) in the 8050A.
Familiarization with the 8050A's controls, indicators, and connectors.
Description of the Liquid Crystal Display (LCD) features and operation.
Precautions to extend the life of the LCD and ensure proper operation.
Cautionary note about exceeding maximum signal input limits, which can damage the instrument.
Description of how to operate the 8050A in its primary measurement functions.
Procedure for AC/DC voltage measurement, illustrated with connection diagram.
Procedure for AC/DC current measurement, illustrated with connection diagram.
Procedure for resistance measurement, including test lead compensation.
Procedure for conductance measurement and range selection.
Procedure for diode testing, including preferred ranges and expected readings.
Procedure for using the relative function to store and display measurement differences.
Procedure for measuring voltages in decibels, including reference impedance selection.
Procedure to verify the basic operation of the 8050A's functions and displays.
Information and techniques to expand the use of the 8050A's primary measurement functions.
Explanation of circuit loading errors in voltage measurements and formulas for calculation.
Explanation of burden voltage error in current measurements and its impact on accuracy.
Additional information and techniques for performing resistance measurements.
Procedure to compensate for test lead resistance in low-resistance measurements.
Using the relative function to simplify resistance matching or comparisons.
Procedure for testing diode leakage (IR) by reverse biasing the junction.
Information and procedures for using a transistor tester fixture to check transistors.
Additional information and techniques for performing relative measurements.
Using the relative function to easily determine circuit gain or loss in decibels.
Discussion of AC voltage/current, True-RMS, waveform comparison, and crest factor.
Discussion of bandwidth limitations and their effect on rectangular waveform measurements.
Procedure using AC voltage, dB, and RELATIVE functions to measure amplifier bandwidth.
Procedure for measuring combined AC and DC signals to determine total RMS value.
Explanation of internal offset effects on AC measurements and their minimal impact.
Overview of the theory of operation, covering functional and circuit descriptions.
Explanation of the 8050A's operation via functional block diagram and major circuits.
Detailed description of the major circuits within the 8050A.
Detailed explanation of the Analog-to-Digital converter's dual-slope conversion method.
Specifics on how the A/D converter handles positive and negative inputs and overrange conditions.
Role of the microcomputer in controlling measurement functions, calculations, and display.
Explanation of signal conditioning circuits that scale and prepare inputs for the A/D converter.
Description of the voltage divider network used for signal conditioning.
Explanation of current measurement conditioning using current shunts.
Details on resistance and conductance signal conditioning techniques.
Explanation of the true-rms converter's operation and its components.
Description of the AC buffer circuits and their gain control.
Operation of the touch-hold circuit in conjunction with the probe.
Description of protection mechanisms against overloads and transients in various modes.
Guidelines and procedures for handling static-sensitive devices to prevent damage.
Overview of maintenance procedures, including access, tests, calibration, and troubleshooting.
Recommendation for a one-year calibration cycle to maintain instrument specifications.
Details on warranty, in-warranty repair, and service center contact information.
General information pertaining to maintenance procedures and precautions.
Information on gaining access to internal components for service and troubleshooting.
Procedure to gain access to calibration adjustments and the backup fuse (F2).
Procedure to access the Display PCB assembly for troubleshooting purposes.
Procedure for safely removing the Display PCB from the instrument.
Procedure for removing the Liquid Crystal Display (LCD) from the Display PCB.
Procedure for replacing the backup fuse (F2) in the 8050A.
Procedure for changing the instrument's configured AC line voltage setting.
Procedure to set the default dB reference impedance for power-up.
Cautions and procedures for cleaning the instrument's case and PCB assemblies.
Tests to compare 8050A performance against specifications for inspection and calibration.
Steps to perform before conducting any of the maintenance tests.
Procedure to verify the proper operation of the LCD and its segments.
Procedure to verify AC and DC voltage measurement functions using a DMM Calibrator.
Procedure to verify the dB voltage measurement function using a DMM Calibrator.
Procedure to verify AC and DC current measurement functions using a DMM Calibrator.
Procedure to verify resistance and conductance measurement functions using a DMM Calibrator.
Procedures for performing calibration adjustments after repair or failed performance tests.
Procedure for performing DC voltage calibration adjustments on the 8050A.
Procedure for performing AC voltage calibration adjustments on the 8050A.
Procedures for selecting jumpers based on calibration results or component replacement.
Procedure for selecting the proper resistance for U5 jumper, related to VR1 or R11.
Procedure for selecting jumpers for RMS converter U32 or calibration network U33.
Procedure to set the initial offset of the RMS converter.
Guidelines for isolating faults and directing technicians to possible causes.
A guide to identifying and resolving discrepancies found during performance tests.
Introduction to the illustrated listing of replaceable parts and ordering procedures.
Information on how to order electrical components and final assemblies.
Information on available options and accessories for the 8050A Digital Multimeter.
Description of the basic use of accessories available for the 8050A.
Description of the soft carrying case designed for storage and transport of the 8050A.
Description of the ruggedized carrying case for maximum protection and adverse conditions.
Information on rack mounting kits for installing the 8050A in standard equipment racks.
Procedure to install the 8050A using offset or center mounting kits.
Procedure to install the 8050A using a dual mounting kit.
Overview of probe accessories and applicable specifications.
Description and operation of the 80T-H Touch-Hold Probe.
Description of the Celsius temperature probe and its features.
Description of the Fahrenheit temperature probe and its features.
Description of the current transformer for extending AC current measurement range.
Description of the current shunt for extending DC current measurement range.
Description of the high voltage probe for measuring up to 6 kV.
Description of the high voltage probe for measuring up to 40 kV.
Description of the RF probe for high-frequency AC voltmeter measurements.
Introduction to the rechargeable battery option for the 8050A.
Specifications for the 8050A-01 rechargeable battery option.
Operation details for the 8050A-01, including battery charging and annunciator.
Procedure for removing and replacing the batteries in the 8050A-01.
Procedure for replacing the main power fuse (F3) for the 8050A-01.
Procedure to change the operating AC line voltage configuration for the 8050A-01.
Definitions of mnemonics and abbreviations used in the schematic diagrams.
Schematic diagram for the Main PCB Assembly (Line Supply version).
Detailed schematic diagram of the Main PCB Assembly.
Schematic diagram for the Main PCB Assembly (Battery Option-01).
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