Unit UT71A Manuale utente

Model UT71A/B

OPERATING MANUAL

CHAPTER TITLE PAGE

Model UT71A/B: OPERATING MANUAL

TABLE OF CONTENTS

Before You Start

Overview

Unpacking Inspection

Safety Information

Rules For Safe Operation

International Electrical Symbols

Getting Acquainted

Turning the Meter On

Battery Considerations

Automatic Power Off

Automatic Backlight Off

Low Battery Indication

The Meter Structure

Rotary Switch

Functional Buttons

The Meter Functions Vs Displays

Selecting the Range

Understanding the Display

Model UT71A/B: OPERATING MANUAL

CHAPTER TITLE PAGE

Analogue Bar Graph

Using MAX MIN

Making Measurements

Introduction

A. Measuring Voltages

B. Measuring Currents

C. Measuring Resistance

D. Testing for Continuity

E. Testing Diodes

F. Measuring Capacitance

G. Measuring Frequency / Duty Cycle

H. Measuring Temperature

I. 4~20mA loop current as % readout

Using Stores, Recall and Send Features

Introduction

Storing and Clearing Readings

Recalling Stored Readings

Using Send

Model UT71A/B: OPERATING MANUAL

CHAPTER TITLE PAGE

Changing the Default Setting

Introduction

Selecting Setup Options

Maintenance

A. General Service

B. Replacing the Fuses

C. Replacing the Battery

Specifications

Safety and Compliances

Physical Specifications

General Specifications

Feature Summary

Basic Specifications

Detailed Accuracy Specifications

A. DC Voltage

B. AC Voltage

C. DC Current

Model UT71A/B: OPERATING MANUAL

CHAPTER TITLE PAGE

D. AC Current

E. Resistance

F. Continuity Test

G. Diode Test

H. Capacitance

I. Frequency

J. Temperature

Degrees Celsius

Fahrenheit

K. 4~20mA loop current

Model UT71A/B: OPERATING MANUAL

Chapter 1

Before You Start

Overview

This Operating Manual covers information on safety and cautions. Please read the relevant information carefully and

observe all the Warnings and Notes strictly.

Warning

To avoid electric shock or personal injury, read the “Safety Information” and “Rules for Safe Operation” carefully

before using the Meter.

Digital Multimeter UT71A/B (hereafter referred to as “the Meter”) is a 20000 counts and 4 1/2 digits with steady

operations, fashionable structure and auto ranging instrument. They all not only can measureAC voltage and current,

DC voltage and current, Resistance, Capacitance, Frequency, Diodes, Continuity, Relative Mode but also has AC

True RMS, AC+DC, Low Battery Display, Double Display Backlight, Data Hold,Automatic Power Off and full overload

protection.

UT71B has extra Temperature, 4~20mA Loop, Data Store and Data Recall feature.

Model UT71A/B: OPERATING MANUAL

Unpacking Inspection

Open the package case and take out the Meter. Check the items shown on Table 1-1 carefully to see any missing

or damaged part:

Table 1-1. Unpacking Inspection

Item Description Qty

In the event you find any missing or damage, please contact your dealer immediately.

English Operating Manual

Test Lead

K-Type (nickel chromium ~ nickel silicon) Point Contact Temperature Probe (It is

only suitable for measuring temperature under 230ºC (UT71B only)

Alligator Clip

Test Clip

USB interface cable

CD-ROM (Installation Guide & Computer Interface Software)

Carrying Bag

9V Battery (NEDA 1604, 6F22, 006P)

1 piece

1 pair

1 piece

1 pair

1 piece

Model UT71A/B: OPERATING MANUAL

Safety Information

This Meter complies with the standards IEC61010 safety

measurement requirement: in pollution degree 2,

overvoltage category (CAT. III 1000V, CAT.IV 600V)

and double insulation.

CAT. III: Distribution level, fixed installation, with smaller

transient overvoltage than CAT. IV

CAT.IV: Primary supply level, overhead lines, cable

systems etc.

Use the Meter only as specified in this operating manual,

otherwise the protection provided by the Meter may be

impaired.

In this manual, a Warning identifies conditions and

actions that may pose hazards to the user, or may

damage the Meter or the equipment under test.

A Note identifies the information that user should pay

attention to.

International electrical symbols used on the Meter and

in this Operating Manual are explained on page 9.

Rules For Safe Operation

Warning

To avoid possible electric shock or personal injury,

and to avoid possible damage to the Meter or to the

equipment under test, adhere to the following rules:

Before using the Meter inspect the case. Do not

use the Meter if it is damaged or the case (or part

of the case) is removed. Look for cracks or missing

plastic. Pay attention to the insulation around the

connectors.

Inspect the test leads for damaged insulation or

exposed metal. Check the test leads for continuity.

Replace damaged test leads with identical model

number or electrical specifications before using the

Meter.

Do not apply more than the rated voltage, as marked

on the Meter, between the terminals or between any

terminal and grounding.

The rotary switch should be placed in the right

position and no any changeover of range shall be

made during measurement is conducted to prevent

damage of the Meter.

Model UT71A/B: OPERATING MANUAL

When the Meter working at an effective voltage over

60V in DC or 30V rms in AC, special care should be

taken for there is danger of electric shock.

Use the proper terminals, function, and range for

your measurements.

If the value to be measured is unknown, use the

maximum measurement position.

Do not use or store the Meter in an environment of

high temperature, humidity, explosive, inflammable

and strong magnetic field. The performance of the

Meter may deteriorate after dampened.

When using the test leads, keep your fingers behind

the finger guards.

Disconnect circuit power and discharge all high-

voltage capacitors before testing resistance,

continuity, diodes.

Before measuring current, check the Meter’s fuses

and turn off power to the circuit before connecting

the Meter to the circuit.

Replace the battery as soon as the battery indicator

appears. With a low battery, the Meter might

produce false readings that can lead to electric

shock and personal injury.

When servicing the Meter, use only the same model

number or identical electrical specifications

replacement parts.

The internal circuit of the Meter shall not be altered

at will to avoid damage of the Meter and any accident.

Soft cloth and mild detergent should be used to

clean the surface of the Meter when servicing. No

abrasive and solvent should be used to prevent the

surface of the Meter from corrosion, damage and

accident.

The Meter is suitable for indoor use.

Turn the Meter off when it is not in use and take out

the battery when not using for a long time.

Constantly check the battery as it may leak when it

has been using for some time, replace the battery

as soon as leaking appears. A leaking battery will

damage the Meter.

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