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EEVBlog 121GW - User Manual

EEVBlog 121GW
76 pages
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121GW Multimeter
User’s Manual
Last Revised 26 October 2018

Table of Contents

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Summary

Contact Information

Glossary of Terms

Change Log

General Information

FCC;IC Compliance

Details regulatory compliance with FCC and IC standards.

User Information and Warnings

Guidance on RF interference and operational warnings.

Introduction

Multimeter Features

Key Features Summary

Highlights the main capabilities and specifications of the multimeter.

Logging and Connectivity

Details on data logging to SD card and Bluetooth LE.

Mechanical and Software Aspects

Information on physical design and software support.

Battery Information

Specifies battery types and expected operational life.

Specifications

General Specifications

Covers general operating conditions, display, and environmental specs.

Overload Protection

Details protection limits for various measurement inputs.

Voltage Specifications

Provides detailed specs for DC, AC, and mV voltage measurements.

Current Specifications

Details specs for DC, AC, mA, and µA current measurements.

Resistance & Capacitance Specs

Specifications for measuring resistance and capacitance.

Diode and Frequency Specs

Specifications for diode testing and frequency measurements.

VA, Temperature & Continuity Specs

Specs for VA power, temperature, and continuity tests.

Bluetooth Compliance

Standards and Certifications

Compliance Symbols Explained

Describes the meaning of various compliance marks.

IEC and ANSI Standards

Details compliance with relevant international and US standards.

Safety Precautions (EN)

Symbol Definitions

Explains warning and caution symbols used in the manual.

Critical Safety Warnings

Lists essential warnings for safe operation and potential hazards.

Symbols Reference

Meter Overview

Front Panel Components

Identifies and describes parts on the front of the multimeter.

Back Panel Features

Highlights features located on the back of the multimeter.

Display Screen Details

Explains the primary and secondary displays and bar graph.

Rotary Switch Functionality

Describes how to use the rotary switch to select modes.

Keypad Operations

Input Terminals

Positions & Modes

Low Z and Temperature Modes

Explains the operation of Low Z and Temperature measurement modes.

Frequency, Continuity, Resistance Modes

Details modes for frequency, continuity, resistance, and capacitance.

Current and Power Modes

Covers various current (A, mA, µA) and power (VA) measurement modes.

Taking Measurements

Voltage Measurement Procedures

Step-by-step guides for various voltage measurements.

Current Measurement Procedures

Step-by-step guides for various current measurements.

Burden Voltage and Low Burden Feature

Explains burden voltage and the meter's low burden capability.

Power (VA) Measurement

Instructions for measuring VA power, including connection setup.

Temperature Measurement

Guide on using the meter with a thermocouple for temperature readings.

Resistance & Continuity Measurement

Procedures for measuring resistance and continuity.

Frequency & Period Measurement

How to measure frequency and period.

Advanced Measurement Functions

Covers range change, holds, REL, MIN/MAX/AVG, backlight, data logging, bluetooth, setup.

Maintenance and Care

Debugging and Troubleshooting

Steps for addressing common issues and alerts.

Cleaning and Storage Guidelines

Advice on keeping the meter clean and storing it properly.

Fuse Replacement

Calibration Procedures

Firmware Update Process

Warranty Information

EEVBlog 121GW Specifications

General IconGeneral
Resistance0.1Ω to 50MΩ
Continuity TestYes
Diode TestYes
True RMSYes
Safety RatingCAT III 1000V, CAT IV 600V
DC Voltage0.1mV to 1000V
Frequency0.001Hz to 10MHz
Temperature-200°C to 1372°C
Wireless ConnectivityWi-Fi
DC Current0.1μA to 10A
AC Current0.1μA to 10A
Capacitance1nF to 100mF
Battery TypeLi-ion rechargeable