Unit UT81B Manuel utilisateur

Model UT81B

OPERATING MANUAL

Chapter Title Page

Model UT81B: OPERATING MANUAL

Table of Contents

1 Before You Start

Overview

Unpacking Inspection

Safety Information

Rules For Safe Operation

International Electrical Symbols

2 Using The Testing Tool

Reading the screen

The Meter Structure

Functional Buttons

3 Making Measurements

A. Scope Mode

i. Setting up the Sleep Mode, Contrast, Beep

ii. ACV, DCV, Hz, ACV and DCA Range

iii. Trigger function

iv. Waveform data save and recall

B. Digital Multimeter Mode

i. Measuring Voltages

ii. Measuring Currents

iii. Measuring Resistance

iv. Testing Diodes

v. Testing for Continuity

vi. Measuring Frequency / Duty Cycle

Model UT81B: OPERATING MANUAL

Chapter Title Page

Table of Contents

DC Voltage

AC Voltage

DC Current

AC Current

Resistance

Diode Test

Continuity Test

vii. Measuring Capacitance

4 Using Software

5 Maintenance The Test Tool

A. General Service

B. Replacing the Fuses

C. Replacing the Battery

6 Specifications

Safety and Compliances

Physical Specifications

General Specifications (Digital Multimeter)

General Specifications (Scope)

Feature Summary

Basic Specifications (Digital Multimeter)

Basic Specifications (Scope)

Detailed Accuracy Specifications

Model UT81B: OPERATING MANUAL

Chapter Title Page

Table of Contents

H. Frequency and Duty Cycle %

I. Capacitance

Model UT81B: OPERATING MANUAL

Table Title Page

List of Tables

1-1 Unpacking Inspection

1-2 International Electrical Symbols

2-1 Reading the Screen

2-2 Functional Buttons

Model UT81B: OPERATING MANUAL

Figure Title Page

List of Tables

2-1 Meter Structure

2-2 Functional Buttons

3-1 Waveform Display

3-2 Voltages Measurement

3-3 µA Range Measurement

3-4 mA Range Measurement

3-5 10A Range Measurement

3-6 Resistance Measurement

3-7 Diode Test

3-8 Continuity Test

3-9 Frequency / Duty Cycle Measurement

3-10 Capacitance Measurement

5-1 Fuse Replacement

5-2 Battery Replacement

Model UT81B: OPERATING MANUAL

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.

Scope Digital Multimeter UT81B (hereafter referred to

as “the Meter”) is a 3999 counts and 3 3/4 digits adopting

digital control techique with both waveform and

multimeter all in one.

Scope mode is a complete intelligent measurement

system including signal input, sampling, data process,

auto search and waveform save and recall. It has

Chapter 1

Before You Start

bandwidth 8MHz, real-time sample rate 40MS/s with

peak rate sampling process can catch up pulse industrial

signal. It can measure AC/DC engine, transducer,

circuit, control, UPS and industrial equipments. It is an

ideal tools in professional repairing industries.

Digital Multimeter mode can measure AC voltage and

current, DC voltage and current, Resistance,

Capacitance, Frequency, Duty Cycle, Diodes and

Continuity.

Item Description Qty

Model UT81B: 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:

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

English Operating Manual

USB interface cable

CD-ROM (Installation Guide & Computer Interface Software)

Test Lead

Alligator Clip

Power Adaptor

1.5V Batteries (R6)

Scope Probe (available at extra cost)

BNC probe (available at extra cost)

1 piece

1 pair

1 piece

4 pieces

1 piece

Table 1-1. Unpacking Inspection

Model UT81B: OPERATING MANUAL

Safety Information

This Meter complies with the standards IEC61010 safety

measurement requirement: in pollution degree 2,

overvoltage category (CAT. II 1000V, CAT.III 600V) and

double insulation.

CAT.II: Local level, appliance, PORTABLE EQUIPMENT

etc., with smaller transient overvoltages than CAT. III

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

transient overvoltage than CAT. IV

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.

Warning

International electrical symbols used on the Meter and

in this Operating Manual are explained on page 10.

Rules For Safe Operation

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 1000V rms between

any terminal and grounding to avoid electric

Model UT81B: OPERATING MANUAL

shock or damages to the Meter.

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.

When the Meter working at an effective voltage

over 60V in DC or 42V 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.

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 us e 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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