Extech Instruments 380942 User Manual

INSTRUCTION MANUAL
Model 380942
True RMS AC/DC 30A Mini Clamp-on Meter
• True RMS AC Current and Voltage
• Measure low current with high resolution to 0.1mA AC and 1mA DC
• Auto Power Off
• One touch DCA zero adjust
• MIN/MAX and Data Hold functions
• 0.9” (23mm) Jaw diameter
Introduction
Congratulations on your purchase of the Extech Model 380942 DC/AC Clamp Meter.
This meter is shipped fully tested and calibrated and, with proper use, will provide years
of reliable service.
www.burntec.com

Extech Instruments 380942 Specifications

General

Brand	Extech Instruments
Model	380942
Category	Measuring Instruments
Language	English

Summary

Introduction

Specifications

General Specifications

Details on display, functions, polarity, sensor, battery, dimensions, and standards.

Range Specifications

Specifies ranges, resolution, accuracy, and overload protection for DC/AC current and voltage.

Specification Notes

Notes on AC voltage/current crest factor and input impedance.

Meter Description and Controls

Safety Symbols and Information

Safe Operation Guidelines

Lists essential rules for safe operation, including voltage limits and fuse handling.

Operation

AC Current Measurements

Step-by-step guide for measuring AC current using the clamp meter.

DC Current Measurements

Step-by-step guide for measuring DC current, including DCA zero adjustment.

AC Voltage Measurements

Instructions for safely measuring AC voltage using test leads.

DC Voltage Measurements

Instructions for safely measuring DC voltage using test leads.

Advanced Features

Relative Measurements

How to perform measurements relative to a zeroed reference reading.

Data Hold Function

Instructions for freezing the current reading on the LCD display.

MIN/MAX Readings

How to view minimum and maximum measured values.

Auto Power Off

Explanation of the auto power off feature and how to disable it.

Maintenance

Battery Replacement

Procedure for replacing the meter's AA batteries.

Cleaning

Cautionary advice on cleaning the plastic case.

Calibration and Repair Services

Warranty