Unit UT70C Manuel utilisateur

Page

Table of Contents

Title

Overview

Unpacking Inspection

Safety Information

Rules For Safe Operation

International Electrical Symbols

The Meter Structure

Rotary Switch

Functional Buttons

Display Symbols

Measurement Ranges

A. Selecting a Measurement Range

B. Manual Ranging and Autoranging

Measurement Operation

A. AC Voltage Measurement

B. DC Voltage Measurement

C. DC Milivolt Measurement

D. Measuring Continuity, Resistance,

Conductance & Capacitance

E. Testing Diodes

F. DC or AC Current Measurement

G. Frequency & Duty Cycle Measurement

MAX MIN Recording Mode

PEAK MAX MIN Mode

Operation of Hold Mode

Operation of Auto Hold Mode

The Use of Relative Value and Relative

Percentage Value Mode

Turning on the Display Backlight

Analogue Bar Graph Display

Full Icons Display

Sleep Mode

General Specifications

Model UT70C: OPERATING MANUAL

Page

Accuracy Specifications

A. AC Voltage

B. DC Voltage

C. Continuity, Resistance &

Conductance Test

D. Capacitance

E. Diodes Test

F. DC Current

G. AC Current

H. Frequency & Duty Cycle

Maintenance

A. General Service

B. Testing the Fuses

C. Replacing the Battery

D. Replacing the Fuses

RS232C Serial Port

A. RS232C Port Cable

B. Setting of RS232C Serial Ports

C. System Requirements for Installing the

UT70C Interface Program

Model UT70C: 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.

Your multimeter is an intelligent digital one, a precise

instrument with a resolution of 8,000 counts and up-to-

date automatic computer calibrating function. High

resolution A/D converter and micro-controller data

processing technique is adopted in the Meter, featured

with intelligence, high precision and multi-functions. The

Meter can be widely used in laboratory, field service,

domestic and other applications. All the functions and

ranges have overloaded protection.

Model UT70C: 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.

Item

Description

Operating Manual

Test Lead

Test Clip

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

(installed)

RS232C Interface Cable

CD-ROM (Installation Guide & Computer

Interface Software)

Holster

Tilt Stand

Qty

1 piece

1 pair

1 piece

Model UT70C: OPERATING MANUAL

Safety Information

CAT. II: Local level, appliance, PORTABLE EQUIPMENT

etc., with smaller transient voltage overvoltages than

CAT. III

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

transient overvoltages than CAT. IV

CAT IV: Primary supply level, overhead lines,

cablesystems 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 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 UT70C: OPERATING MANUAL

CE Version: The Meter complies with the standards

IEC61010-1:in pollution degree 2, overvoltage category

CAT III 1000V, CAT IV 600V and double insulation .

ULVersion: The Meter complies with the standards UL61010B-1,

in pollution degree 2, overvoltage category CAT II 1000V

and double insulation.

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 Do not apply more than the rated voltage, as

marked on the Meter, between the terminals or

between any terminal and grounding.

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 Never working at an effective voltage over 60V

in DC or 30V rms in AC for there is danger of

electric shock.

l Use the proper terminals, function, and range

for your measurements.

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 When using the test leads, keep your fingers

behind the finger guards.

Model UT70C: OPERATING MANUAL

Rules For Safe Operation (2)

l Disconnect circuit power and discharge all high-

voltage capacitors before testing resistance,

conductance, continuity, diodes, current, or

capacitance.

l Before measuring current, check the Meter's

fuses and turn off power to the circuit before

connecting the Meter to the circuit.

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.

l Remove test leads, RS232C interface cable and

test clip from the Meter and turn the Meter power

off before opening the Meter case.

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 The Meter is suitable for indoor use.

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.

Model UT70C: OPERATING MANUAL

International Electrical Symbols

The Meter Structure (see figure 1)

(figure 1)

1 Front Case

2 LCD Display

3 Functional Buttons

4 Rotary Switch

5 Input Terminals

AC (Alternating Current)

DC (Direct Current)

AC or DC

Grounding

Double Insulated

Deficiency of Built-In Battery

Continuity Test

Diode

Capacitance Test

Fuse

Warning. Refer to the Operating Manual

Conforms to Standards of European Union

Model UT70C: OPERATING MANUAL

OFF

Rotary Switch

Below table indicated for information about the rotary

switch positions.

Rotary

Switch

Position

Function

Power is turned off.

AC voltage measurement.

DC voltage measurement.

DC millivolt measurement.

:Continuity test.

: Resistance measurement.

:Capacitance test.

Diode Test.

AC or DC Current Measurement

from 0.001A to 10.00A .

AC or DC Current Measurement

from 0.1mA to 800.0mA.

Model UT70C: OPERATING MANUAL

Functional Buttons (1)

Below table indicated for information about the functional

button operations.

Button Operation PerformedMeasuring

Function

Continuity

Test Turn the continuity buzzer on and

off in resistance measurement

mode.

At OFF

position

At REC

mode or

REC mode

plus Hold

mode

Press while turning on the

Meter to disable the beeper at all

functions except short circuit and

diode testing.

To toggle between 100ms

response time and 1ms response

time under REC mode except at

resistance, capacitance and

continuity range.

MAX

MIN Any rotary

switch

position

except at

conductance

mode.

Starts recording of maximum and

minimum values. Steps the

display through the sequence of

present, high (MAX), low (MIN)

and average (AVG) readings at

any mode.

In 1ms response time, it steps

through only MAX and MIN

reading.

At OFF

position To select 1 second high accuracy

response time, press and hold

down MAX MIN while turning the

rotary switch to any function

setting.

RANGEAny rotary

switch

position

1. Press RANGE to enter the

manual ranging mode; the

Meter beeps.

2. Press RANGE to step

through the ranges available

for the selected function; the

Meter beeps.

3. Press and hold RANGE for

over 1 second to return to

autoranging; the Meter

beeps.

Model UT70C: OPERATING MANUAL

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