Unit UT90A Manuel utilisateur

Table of Contents

Title Page

Overview

Unpacking Inspection

Safety Information

Rules For Safe Operation

International Electrical Symbols

The Meter Structure

Rotary Switch

Functional Buttons

Display Symbols

Measurement Operation

A. DC Voltage Measurement

B. AC Voltage Measurement

C. DC Current Measurement

D. AC Current Measurement

E. Resistance Measurement

F. Testing Diodes & Continuity

G. Battery Test

General Specifications

Accuracy Specifications

A. DC Voltage

B. AC Voltage

C. DC Current

D. AC Current

E. Resistance

F. Diodes & Continuity Test

Maintenance

A. General Service

B. Replacing the Fuses

C. Replacing the Battery

Model UT90A: OPERATING MANUAL

Table of Contents

Title Page

Overview

Unpacking Inspection

Safety Information

Rules For Safe Operation

International Electrical Symbols

The Meter Structure

Rotary Switch

Functional Buttons

Display Symbols

Measurement Operation

A. DC Voltage Measurement

B. AC Voltage Measurement

C. DC Current Measurement

D. AC Current Measurement

E. Resistance Measurement

F. Testing Diodes & Continuity

G. Battery Test

General Specifications

Accuracy Specifications

A. DC Voltage

B. AC Voltage

C. DC Current

D. AC Current

E. Resistance

F. Diodes & Continuity Test

Maintenance

A. General Service

B. Replacing the Fuses

C. Replacing the Battery

Model UT90A: 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.

The Model UT90A (hereafter referred to as “the Meter”)

is a 1999 counts 3 1/2 digits multimeter with stabilized

functions, safe design, and reliable performance.

In addition to the conventional measuring function, such

as DC/AC voltage, DC/AC current, resistance, diode and

continuity, it is also a highly applied digital electrical tester

of good performance with battery test, large LCD full

icons display, full overload protection and streamline

outlook.

Table of Contents

Title Page

Overview

Unpacking Inspection

Safety Information

Rules For Safe Operation

International Electrical Symbols

The Meter Structure

Rotary Switch

Functional Buttons

Display Symbols

Measurement Operation

A. DC Voltage Measurement

B. AC Voltage Measurement

C. DC Current Measurement

D. AC Current Measurement

E. Resistance Measurement

F. Testing Diodes & Continuity

G. Battery Test

General Specifications

Accuracy Specifications

A. DC Voltage

B. AC Voltage

C. DC Current

D. AC Current

E. Resistance

F. Diodes & Continuity Test

Maintenance

A. General Service

B. Replacing the Fuses

C. Replacing the Battery

Model UT90A: OPERATING MANUAL

Unpacking Inspection

Open the package case and take out the Meter. Check

the following items carefully to see any missing or

damaged part:

In the event you find any missing or damage, please

contact your dealer immediately.

Holster

Table of Contents

Title Page

Overview

Unpacking Inspection

Safety Information

Rules For Safe Operation

International Electrical Symbols

The Meter Structure

Rotary Switch

Functional Buttons

Display Symbols

Measurement Operation

A. DC Voltage Measurement

B. AC Voltage Measurement

C. DC Current Measurement

D. AC Current Measurement

E. Resistance Measurement

F. Testing Diodes & Continuity

G. Battery Test

General Specifications

Accuracy Specifications

A. DC Voltage

B. AC Voltage

C. DC Current

D. AC Current

E. Resistance

F. Diodes & Continuity Test

Maintenance

A. General Service

B. Replacing the Fuses

C. Replacing the Battery

Model UT90A: OPERATING MANUAL

Item

Description

English Operating Manual

Test Lead

9V Battery (NEDA1604, 6F22 or 006P)

Qty

1 piece

1 pair

1 piece

Safety Information

This Meter complies with standards IEC61010: 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 overvoltages 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 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 on.

International electrical symbols used on the Meter and

in this Operating Manual are explained on page 8.

Model UT90A: OPERATING MANUAL

Rules For Safe Operation (1)

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:

l 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.

l 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.

l When using the test leads, keep your fingers

behind the finger guards.

l Do not apply more than the rated voltage, as

marked on the Meter, between the terminals or

between any terminal and grounding.

l When the Meter working at an effective voltage

over 60V in DC or 30V in AC, special care should

be taken for there is danger of electric shock.

l Use the proper terminals, function, and range

for your measurements.

l 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.

l Disconnect circuit power and discharge all high-

voltage capacitors before testing current,

resistance, diodes or continuity.

l 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.

Model UT90A: OPERATING MANUAL

Rules For Safe Operation (2)

l When servicing the Meter, use only the same

model number or identical electrical specifications

replacement parts.

l The internal circuit of the Meter shall not be

altered at will to avoid damage of the Meter and

any accident.

l 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.

l Turn off the Meter when it is not in use and

take out the battery when not using for a long

time.

l 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.

l 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.

l The Meter is suitable for indoor use.

Model UT90A: OPERATING MANUAL

International Electrical Symbols

AC (Alternating Current).

DC (Direct Current).

AC or DC.

Grounding.

Double Insulated.

Deficiency of Built-In Battery.

Continuity Test.

Diode.

Fuse.

Warning. Refer to the Operating Manual.

Conforms to Standards of European Union.

Model UT90A: OPERATING MANUAL

The Meter Structure (see figure 1)

( figure 1)

1 LCD Display.

2 Hold Button.

3 Rotary Switch.

4 Input Terminals.

5 Power Button.

Model UT90A: OPERATING MANUAL

AC Current Measurement Range from

0.1µA to 10A

Model UT90A: OPERATING MANUAL

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