Mastech MS8201H Manuale utente

DIGITAL MULTIMETER

OPERATOR’S MANUAL

CONTENTS

1. SAFETY INFORMATION ……1

1.1 PRELIMINARY ……1

1.2 DURING USE ……2

1.3 SYMBOLS ……5

1.4 MAINTENANCE ……6

2. DESCRIPTION ……8

2.1 NAMES OF COMPONENTS ……8

2.2

SWITCH AND BUTTONS

ELUCIDATE

……10

3. SPECIFICATIONS ……11

3.1 GENERAL SPECIFICATIONS ……11

3.2 ELECTRICAL

SPECIFICATIONS

……12

4. OPERATING INSTRUCTION ……20

4.1 READ HOLD ……20

4.2 BACK LIGHT ……20

4.3 DC/AC TRANSFORM ……21

4.4 L/C TRANSFORM ……21

4.5

PREPARATION FOR

MEASUREMENT

……22

4.6 MEASURING DC VOLTAGE ……23

4.7 MEASURING AC VOLTAGE ……25

4.8 MEASURING DC CURRENT ……26

4.9 MEASURING AC CURRENT ……29

4.10 MEASURING RESISTANCE ……31

4.11 MEASURING CAPACITANCE ……33

4.12 MEASURING INDUCTANCE ……35

4.13 MEASURING

TEMPERATURE

……37

4.14 MEASURING FREQUENCY ……39

4.15 DIODE TESTING ……40

4.16 CONTINUITY TESTING ……42

4.17 TRANSISTOR TESTING ……44

4.18 TTL LOGIC TESTING ……46

5. MAINTENANCE

……49

5.1 BATTERY REPLACEMENT ……49

5.2 FUSE REPLACEMENT ……51

5.3 TEST LEADS

REPLACEMENT

……52

6. ACCESSORIES ……53

1. SAFETY INFORMATION

WARNING

To ensure safe operation, and in

order to exploit to the full the

functionality of the meter, please

follow the directions in this

section carefully.

This multimeter has been designed

according to IEC-1010 concerning

electronic measuring instruments with

an overvoltage category (CAT ΙΙ) and

pollution 2.

Follow all safety and operating

instructions to ensure that the meter is

used safely and is kept in good

operating condition.

With proper use and care, your digital

multimeter will give you years of

satisfactory service.

1.1 PRELIMINARY

1.1.1 When using the meter, the user

must observe all normal safety rules

concerning:

•Protection against the dangers of

electrical current.

Digital Multimeter 1

•Protection of the meter against

misuse.

1.1.2 When the meter is delivered,

check that it has not been damaged

in transit.

1.1.3 When poor condition under harsh

preservation or shipping conditions

caused, inspect and confirm this

meter without delay.

1.1.4 Measuring leads must be in good

condition. Before using verify that

the insulation on test leads is not

damaged and/or the leads wire is

not exposed.

1.1.5 Full compliance with safety

standards can be guaranteed only if

used with test leads supplied. If

necessary, they must be replaced

with the same model or same

electric ratings.

1.2 DURING USE

1.2.1 Before using, you must select the

right input jack, function and range.

1.2.2 Never exceed the protection limit

values indicated in specifications for

2 Digital Multimeter

each range of measurement.

1.2.3 When the meter is linked to a

measurement circuit, do not touch

unused terminals.

1.2.4 When the value scale to be

measured is unknown beforehand,

set the range selector at the highest

position.

1.2.5 Do not measure voltage if the

voltage on the terminals exceeds

1000V above earth ground.

1.2.6 Always be careful when working

with voltages above 60V DC or 30V

AC rms, keep fingers behind the

probe barriers while measuring.

1.2.7 Never connect the meter leads

across a voltage source while the

function switch is in the current,

resistance, capacitance, inductance,

temperature, frequency, diode,

transistor or continuity mode. Doing

so can damage the meter.

1.2.8 Before rotating the range switch

to change functions and ranges,

disconnect test leads from the

Digital Multimeter 3

circuit under test.

1.2.9 When carrying out measurements

on TV or switching power circuits

always remember that there may be

high amplitude voltages pulses at

test points, which can damage the

meter.

1.2.10 Never perform resistance,

capacitance, inductance, diode and

continuity measurements on live

circuits.

1.2.11 Never perform capacitance

measurements unless the capacitor

to be measured has been

discharged fully.

1.2.12 Never use the meter under the

condition of the explosive air, steam

or dirt.

1.2.13 If any faults or abnormalities are

observed, the meter can not be

used any more and it has to be

checked out.

1.2.14 Never use the meter unless the

rear case is in place and fastened

fully.

4 Digital Multimeter

1.2.15 Please do not store or use

meter in areas exposed to direct

sunlight, high temperature, humidity

or condensation.

1.3 SYMBOLS

Important safety information, refer

to the operating manual.

Double insulation （Protection

classΙΙ）.

CAD II Overvoltage (Installation)

category II, Pollution Degree 2

per IEC1010-1 refers to the

level of Impulse Withstand

Voltage protection provided.

CAT III Overvoltage (Installation)

category III, Pollution Degree 2

per IEC1010-1 refers to the

level of Impulse Withstand

Voltage protection provided.

Conforms to European Union

Directive

Earth ground

Power ON/OFF

Fuse

Low Battery

Digital Multimeter 5

~ AC (alternating current)

DC (direct current)

Continuity Buzzer

~ AC or DC (alternating current or

direct current)

1.4 MAINTENANCE

1.4.1 Please do not attempt to adjust or

repair the meter by removing the

rear case while voltage is being

applied. A technician who fully

understands danger involved should

only carry out such actions.

1.4.2 Before opening the battery cover

or case of the meter, always

disconnect test leads from all tested

circuits.

1.4.3 To avoid the wrong reading

causing electricity attack, when the

meter displays “”, you must

change the battery.

1.4.4 For continue protection against

fire, replace fuse only with the

specified voltage and current ratings:

F 250mA /250V (quick acting,

≤1

6 Digital Multimeter

resistance Ω), F 12.5A / 250V

1.4.5 Do not use abrasives or solvents

on the meter, use a damp cloth and

mild detergent only.

1.4.6 Always set the power switch to

the OFF position when the meter is

not in use.

1.4.7 If the meter is to be stored for

a long period of time, the batteries

should be removed to prevent

damage to the unit.

Digital Multimeter 7

(quick acting).

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