Unit UT202A Manuel utilisateur

UT202A Operating Manual

Title Page

Contents

Overview

Unpacking Inspection

Safety Information

Rules for Safe Operation

International Electrical Symbols

The Meter Structure

Functional Buttons and auto power off

Display Symbols

Measurement Operation

A. DC Voltage Measurement

B. AC Voltage Measurement

C. Measuring Resistance

D. Testing Diodes

E. Testing for Continuity

F. AC Current Measurement

Specications

A. General Specications

B. Environmental Restriction

Accuracy Specications

A. AC Voltage

B. DC Voltage

C. Resistance

D. Continuity Test

E. Diode Test

F. AC Current

Maintenance

A. General Service

B. Replacing the Battery

UT202A 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.

Digital Multimeter Model UT202A (hereafter

referred to as “the Meter”) is 3 1/2 digits with

steady operations, fashionable structure and

highly reliable measuring instrument. The Meter

uses large scale of integrated circuit with double

integrated A/D converter as its core and has full

range overload protection.

The Meter can measure AC/DC Voltage, AC

Current, Resistance, Diodes, and Continuity.

Unpacking Inspection

Open the package case and take out the Meter.

Check the following items carefully to see any

missing or damaged part:

Item Description Qty

1 English Operating Manual 1 piece

2 Test Lead 1 pair

In the event you find any missing or damage,

please contact your dealer immediately.

Safety Information

This Meter complies with the standards

IEC61010: in pollution degree 2, overvoltage

category (CATII 600V, CAT III 300V) and double

insulation.

CATII: Local level, appliance, PORTABLE

EQUIPMENT etc., with smaller transient

overvoltages than CATIII.

CAT III: Distribution level, xed installation, with

smaller transient overvoltages than CAT IV

Use the Meter only as specied in this operating

manual, otherwise the protection provided by

the Meter may be impaired.

In this manual, a Warning identies 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 to.

International electrical symbols used on

the Meter and in this Operating Manual are

explained on page 6.

UT202A Operating Manual

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

specications 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. If the

value to be measured is unknown, use the

maximum measurement position and reduce the

range step by step until a satisfactory reading is

obtained.

● When measurement has been completed,

disconnect the connection between the test

leads and the circuit under test, remove the

testing leads away from the input terminals of

the Meter and turn the Meter power off.

● 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.

● Do not carry out the measurement when

the Meter’s back case and battery compartment

UT202A Operating Manual

are not closed to avoid electric shock.

● Do not input higher than 600V between the

Meter’s terminals and the grounding to avoid

electric shock and damages to the Meter.

● 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.

● 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

ngers behind the nger guards.

● Disconnect circuit power and discharge

all high-voltage capacitors before testing

resistance, continuity and diode.

● 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

specications 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

UT202A Operating Manual

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.

International Electrical Symbols

AC (Alternating Current)

DC (Direct Current)

AC or DC

Grounding

Double Insulated

Warning. Refer to the Operating Manual

Deciency of Built-In Battery

Continuity Test

Diode

Conforms to Standards of European Union

UT202A Operating Manual

The Meter Structure (see gure 1)

1. Input Terminals

2. LCD Display

3. Functional Buttons

4. Rotary Switch

5. Trigger: press the lever to open the

transformer jaws. When the pressure on the

lever is released, the jaws will close.

6. Hand Guards: to protect user’s hand from

touching the dangerous area.

7. Transformer Jaws: designed to pick up the

AC current owing through the conductor.

It could transfer current to voltage. The

tested conductor must vertically go through

the jaw center.

(gure 1)

Functional Buttons and auto power

off

1. HOLD

Press HOLD to enter and exit hold mode. Press

and hold HOLD button while turning on the

Meter, auto power off be canceled.

2. MAX

Press MAX to start recording and updating of

maximum values.

3. SELECT

Under Ωranging, resistance

measurement mode is default, press SELECT

to select continuity measurement mode or diode

measurement mode.

4. Auto power off

To preserve battery life, the Meter automatically

goes into a “sleep” mode if you do not press any

button for around 10 minutes. The Meter can be

activated by pressing any effective button (refer

to The Effectiveness of Functional Buttons),

then returns to the display for the function

selected previously.

5. Buzzer

The buzzer phonate go with every time button

be effectual pressed. When the meter will auto

power off in 1 minute the buzzer beeps five

times. Before power off there will be a long time

buzzer beeps.

6. The Effectiveness of Functional Buttons

Not every functional buttons can be used on

UT202A Operating Manual

every rotary switch positions. Below table

describe which functional buttons can be used

on which rotary switch positions

Rotary Functional Buttons

Switch SELECT MAX HOLD

Positions

Ω • N/A •

N/A • •

A 20A N/A • •

A 200A N/A • •

A 600A N/A • •

109

UT202A Operating Manual

109

UT202A Operating Manual

Display Symbols (see gure 2)

(gure 2)

Number Meaning

1 Indicator for AC voltage or current

2 Indicator for DC voltage

3 The battery is low.

Warning: To avoid false readings, which

could lead to possible electric shock or

personal injury, replace the battery as soon as

the battery indicator appears.

4 The Meter is in the auto range mode in

which the Meter automatically selects

the range with the best resolution.

5 Test of diode

6 The continuity buzzer is on

7 Maximum reading displayed

8 Data hold is active

9 Amperes (amps). The unit of current.

10 Ω: Ohm. The unit of resistance.

kΩ:Kilohm. 1000 ohms

MΩ:Megohm. 1,000,000 ohms

11 V: Volts. The unit of voltage.

mV: Millivolt. 0.001 volts

12 Indicates negative reading

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