UNI-T UT521 User Manual

UT521 USERS MANUAL
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Content
Chapter Page
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5
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1. Safety Instructions
2. Characteristics
3. General Specifications
4. Product outlook & accessories
5. Preparation before measurement
6. Measurement Operation
7. Maintenance & Repair

UNI-T UT521 Specifications

General

Backlight	Yes
Product type	Digital multimeter
Dimensions (WxDxH)	160 x 70.5 x 100 mm
Battery voltage	1.5 V

Weight and Dimensions

Weight	560 g

Summary

Safety Instructions

Characteristics

Precision 3-Wire & Simple 2-Wire Testing

Supports both precision 3-wire and simpler 2-wire testing methods for earth resistance.

General Specifications

Measurement Methods

Details the methods used for Earth Voltage and Earth Resistance testing.

Maximum Operating Accuracy

Outlines the accuracy specifications across different measurement ranges.

Overload Protection

Details the overload protection limits for Earth Resistance and Earth Voltage measurements.

Insulation Resistance Specification

Preparation Before Measurement

Battery Voltage Check

Procedure to check battery status and determine if replacement is needed before use.

Test Leads Connection

Instructions on correctly connecting test leads to ensure accurate measurements.

Measurement Operation

Precision Measurement

Detailed steps for performing accurate earth resistance measurements using 3-wire setup.

Earth Voltage Testing

Procedure for measuring earth voltage, including safety precautions.

Earth Resistance Testing

Steps for performing earth resistance measurements across different ranges.

Simple Measurement

Guide for performing earth resistance measurements using the simpler 2-wire method.

Maintenance & Repair

Maintenance

General guidelines for maintaining the tester's condition.

Cleaning the Tester

Repair

Information on when and how to seek professional repair services for the tester.