Mastech MS8332C Manuel utilisateur

MS8332C

Digital Multimeter

User Manual

CAT III

600 V

CONTENTS CONTENTS

1. Introduction...............................................1

2. Safety Information.....................................2

3. Product Overview.................................3

3.1 Product External View ..........................3

3.2 Function Keys..........................................4

3.3 Symbols..................................................4

4. Technical Index ................................5

4.1 General Characteristics.............................5

4.2 Electrical Technical Index..............................5

5. Measuring Operations .......................9

5.2 Resistance Measurement............................10

5.1 AC Voltage and DC

Voltage Measurement ...............................9

5.3 Diode Measurement ..................................11

5.4 Continuity Measurement ...........................11

5.5 Capacitance Measurement........................12

5.6 Frequency Measurement ..........................13

5.7 Duty Cycle Measurement ..........................13

5.8 Current Measurement ...............................13

6. Maintenance .................................15

6.1 Battery Replacement ................................15

6.2 Fuse Replacement....................................15

6.3 Cleaning...................................................15

01 02

1.Introduction

The digital multimeter is designed and manufactured

according to safety requirements of EN 61010-1,

EN 61010-2-030, EN 61010-2-033, EN 61010-031 on

electronic measuring instrument and hand held digital

multipurpose meter.

And conforms to UL STD.61010-1,61010-2-030,

61010-2-033, Certified to CSA STD.C22.2 NO.61010-1,

61010-2-030, IEC STD61010-2-033.

The product meets with the requirements of 600V

CAT III and pollution degree 2.

The meter can be used for measuring DC voltage,

AC voltage, resistance,diode, buzzer, Continuity test,

DC current and AC current etc . The unique non-contact

AC voltage detection function can promptly remind you

to pay attention to safety operation , the full scale

AC220V protection design makes you more safe and

relieved.

This series of meters can be widely used for schools,

labs, research institutes, enterprises and factories etc.

various electronic industries Please read this operating

instruction carefully and pay attention to related safe

working standards before using this meter , Protection

provided by the instrument will be impaired if used in a

manner not specified by the manufacturer.

2. Safety Information

The special attention should be paid when using

the meter because the improper usage may cause

electric shock and damage the meter .The safety

measures in common safety regulations and

operating instruction should be complied with

when using. In order to make fully use of its

functions and ensure safe operations please

comply with the usage in this section carefully.

Warning

In order to avoid personal injury and meter damage

caused by electric shock, the following safety tips should

be paid attention to:

• Don’t measure any voltage out of stipulated measuring

range of the meter.

• Don’t apply high voltage (above 100V) at input end

when measuring resistance and diode.

• Don’t use the meter if the test line is damaged or

exposed metal part.

• Avoid using under direct sunlight or high temperature.

• Pay attention to the possibility of electric shock when

measuring voltage in excess of 36V AC or 48C DC.

• Before measuring current, firstly turn off the power of

measured equipment and measured circuit, Electrify to

measure after connecting test leads.

• Pay attention to battery polarity when changing battery.

• Measure known voltage with the meter to verify that the

meter is working properly. If the meter is working abnormally,

stop using it immediately. A protective device may be damaged.

If there is any doubt, please have the meter inspected by a

qualified technician.

AC (Alternating Current)

DC (Direct Current)

Double Insulation

Fuse

Caution,risk of danger(see manual)

03 04

3.2 Function Keys

Function Switching Key, The voltage

current range is used for switching AC/DC

mode,the resistance rangeis used for

switching mode.

Switching key between frequency and duty

cycle, it is used for switching Hz and % at

voltage range and current range.

HOLD/backlight Key, press this key to hold

the data. Press this key 2 second to open

the backlight.

3.3 Symbols

3. Product Overview

3.1 Product External View

1.Non-contact AC Voltage Indicator Light

2.LCD Display

3.HOLD/backlight Key

4.Function Selection Key

5.Select Switch

6.Hz% Switching Key

(MEASUREMENT CATEGORY III) is

applicable to test and measuring circuits

connected to the distribution part of the

building’s low-voltage MAINS installation.

CAT III

Accord with the related EU laws and regulations

Ground

Conforms to UL STD. 61010-1, 61010-2-030 and

61010-031; Certified to CSA STD C22.2

NO. 61010-1, 61010-2-030 and 61010-031

±(0.8% rdg + 3dgt)

±(1.0% rdg +5dgt)

Input Impedance: 10MΩ

Max. Input Voltage: 600V AC

Frequency Range: 40~400Hz

Response: average value response (r.m.s. of sine wave)

40V

400V

600V

1mV

10mV

100mV

4.2.2 AC Voltage

Measuring Range Resolution Accuracy

05 06

• Automatic measuring range is DMM, full range is 3999

counting.

Display: 3 3/4 digits LCD display.•

Overload protection: full range protection.•

Data hold function.•

Relative value measurement.•

Low voltage display.•

Over range display (“OL”)•

Automatic power off.•

Working temperature and humidity: 0~40 (32~104 • ℃ ℉);

relative humidity <80%RH

Storage temperature and humidity: -10~50 (14~122 • ℃ ℉);

relative humidity <70%RH

Altitude < 2000m•

Power Supply: AAA 2*1.5V Battery•

Safety Class: EN61010-1, CAT III 600V•

Dimension (LxWxH): 110X58X33mm, •

Weight: about 150g•

4 Technical Index

4.1 General Characteristics

4.2 Electrical Technical Index

(Ambient Temperature: 23±5°C Relative Humidity: <75%)

400mV

40V

400V

600V

0.1mV

1mV

10mV

100mV

4.2.1 DC Voltage

±(0.5% rdg + 3dgt)

±(0.8% rdg +5dgt)

Measuring Range Resolution Accuracy

Input Impedance:10MΩ

Max. Input Voltage:600V DC

±(1.0% rdg + 3dgt)

±(1.2% rdg +15dgt)

Measuring Range Resolution Accuracy

0.1Ω

1Ω

10Ω

100Ω

1KΩ

10KΩ

400Ω

4kΩ

40kΩ

400kΩ

4MΩ

40MΩ

Open Circuit Voltage: about 0.25V.

Overload Protection: 250V DC or AC (r.m.s.)

4.2.3 Resistance

4000uA

40mA

400mA

10uA

1uA

100uA

400uA 0.1uA

Max.Current:400mA

Overload Protection: mA measuring range: FF 400mA/600V fuse

±(1.8% rdg + 5dgt)

Measuring Range Resolution Accuracy

4.2.5 DC Current

07 08

Measuring Range Function

Display forward voltage drop of diode

The buzzer makes a sound when the

resistance is less than 50±20Ω

Open Circuit Voltage: diode is about 1.5V, buzzer is about 0.5V.

Overload Protection: 250V DC or AC (r.m.s.)

4.2.4 Diode, Continuity

4000uA

40mA

400mA

10uA

1uA

100uA

400uA 0.1uA

Max.Current: 400mA

Overload Protection: mA measuring range:

FF 400mA H 600V, 10KA fuse

Frequency Range: 40~400Hz

Response: Average value (r.m.s. of sine wave)

±(2.0% rdg + 8dgt)

Measuring Range Resolution Accuracy

4.2.6 AC Current

Overload Protection: 250V DC or AC (r.m.s.)

40nF

400nF

4uF

40uF

100uF

0.01nF

0.1nF

1nF

10nF

100nF

Measuring Range Resolution Accuracy

4.2.7 Capacitance

±(5 0% rdg +30dgt).

±(3 0% rdg +15dgt).

±(5 0% rdg +25dgt).

±(1.5% rdg +15dgt)

Measuring Range Accuracy

4.2.8 Frequency

±(2.0% rdg +5dgt)

Measuring Range Accuracy

4.2.9 Duty Cycle

0.5-99.9%

1Hz-5MHz

±(2.0% rdg +20dgt)

Measuring Range Accuracy

4.2.10 Bat test

1.5V

09 10

5. Measuring Operations

5.1 AC Voltage and DC Voltage Measurement

1.To avoid electricial shock or meter damage, any

voltage in excess of 600V DC or r.m.s AC are not

allowed to measure.

2.To avoid electricial shock or meter damage, any

voltage in excess of 600V DC or r.m.s. AC

between meter and earth aren't allowed to apply.

3.Don't measure AC/DC voltages if a motor on the

circuit is being switched ON or OFF. Large voltage

surges may occur that can damage meter.

Warning

The voltage ranges of the meter are:

DC Voltage: 400.0mV, 4.000V, 40.00V, 400.0V, 600V;

AC Voltage: 4.000V, 40.00V, 400.0V, 400.0V.600V

The method of measuring voltage is:

1.Turn rotary switch to position.Hz%

2.Press key and select AC or DC measuring Apply

the two ends of test leads to measure the voltage

value of circuit under test. (Paralleled with circuit

under test).

3.Read measured voltage value with LCD . When

measuring DC voltage ,the display shall display the

voltage polarity connected with red test leads at the

same time.

Notice:

At DC 400mV and AC 4V ranges and under non-input,

the meter shall have several readings because of

outside interference, but its normal usage and

measuring accuracy will not be affected.

5.2 Resistance Measurement

In order to avoid the meter or measured equipment

from being damaged,cut off all power supply of

measured circuits and discharge all high voltage

capacitors before measuring capacitance.

Warning

The resistance ranges of the meter are:

400.0Ω,4.000kΩ,40.00 kΩ,400.0 kΩ,4.000MΩ,40.00 MΩ.

The method of measuring resistance is:

1.Turn rotary switch to position.

2.Press key and select Ω measuring range.

3.Apply the two ends of test leads to measure the

resistance value of circuit under test.

4.Read measured resistance value with LCD.

Notice:

1.Theno-line measured resistance value shall be

different from rated resistance value, because other

elements on circuit are connected with measured

resistance, which is equivalent to parallel connection

of two or multi resistances.

2.When measuring low resistance, for the measurement

accuracy, please firstly make two test leads short

circuit , here read out the displayed resistance value,

minus this displayed value from the correct counting of

measured resistance.

3.When measuring at high resistance range, the reading

can be confirmed after several seconds.

4.Under open circuit , if the meter displays “OL”, it will

show that the measured value exceeds range.

11 12

5.3 Diode Measurement

To avoid the meter or measured equipment from

being damaged, cut off all power supply of

measured circuits and discharge all high voltage

capacitors before measuring diode.

Warning

The method of measuring diode is:

1.Turn rotary switch to position.

2.Press key and select measuring range.

3.Separately connect black and red test leads to

negative pole and positive pole of measured diode.

4.The meter shall display forward bias value of

measured diode.If the poles of the test leads are

connected inversely, the meter will display “OL”.

Notice:

For on-line measuring diode, display forward voltage

drop at forward measurement; the reverse measurement

depends on the values of other elements connected in

parallel at both ends of diode.

5.4 Continuity Measurement

To avoid the meter or measured equipment from

being damaged,cut off all power supply of

measured circuits and discharge all high voltage

capacitors before continuity measurement.

Warning

The method of continuity measurement is:

1.Turn rotary switch to position,.

2.Press key and select measuring range.

3.Separately connect two ends of test leads to the two

ends of measured part and circuit.

4.The meter shall display the approximate resistance

value between measured points.Here if the resistance

value between measured points is less than 50±20Ω,

the buzzer will make a sound.

5.5 Capacitance Measurement

To avoid the meter or measured equipment from

being damaged,cut off all power supply of

measured circuits and discharge all high voltage

capacitors before on/off measurement.

Warning

The capacitance ranges of the meter are:

40.00nF, 400.0nF, 4.000uF, 40.00uF, 100.0uF.

The method of measuring capacitance is:

1.Turn rotary switch to position,

2.Press key and select measuring range.

3.Apply the two ends of test leads to measure the two

pins of the capacitance under test and read measured

value from LCD.

Notice:

1.The meter shall take some time to stabilize the reading

when high capacitance.

2.The small capacitance with less than 10nF shall minus

the distribution capacitance of the meter and lead

(namely displayed base number) when measuring.

measuring

13 14

5.6 Frequency Measurement

The method of measuring frequency is:

1.Turn rotary switch Hz% to position.

2.Press Hz% key and select Hz range.

3.Apply the two ends of test leads to measure the

frequency value of the circuit under test.

4.Read frequency value from LCD.

5.7 Duty Cycle Measurement

The method of measuring duty cucle is:

1.Turn rotary switch to Hz% position.

2. Press Hz% key and select % range.

3.Apply the two ends of test leads to measure the duty

cycle value of the circuit under test.

4.Read frequency value from LCD.

5.8 Current Measurement

To avoid the meter or measured equipment from

being damaged, firstly check the fuse of the meter

before measuring current.When measuring ,

please use correct input socket, function shift and

measuring range.

Don't try to measure current when the open circuit

voltage exceeds 250V.

Warning

The DC current range: 400uA, 4.000mA, 40.00mA,

400.0mA .The AC current range: 400uA, 4.000mA,

40.00mA, 400.0mA

The method of measuring resistance is:

1.Cut off the power of measured circuit. Discharge all

high voltage capacitance on measured circuit.

2.Turn rotary switch to mA or uA position.When the

measured current is less than 400uA, select uA

position.When the measured current is 4mA~400mA,

select mA position.

3.Disconnect the circuit under test. Connect black test

lead to the end of disconnected circuit under test

(with lower voltage), connect red test lead to the other

end of disconnected circuit under test ( with higher

voltage).

4.Switch on the power of the circuit, and then read out

displayed reading.If the display only displays “OL”, it

will show that the input exceeds selected range, and

the rotary switch shall be placed at higher range.

5.Cut off the power of measured circuit. Discharge all

capacitances, take off the test leads and recover the

circuit

Notice:

1.The measuring current of the meter shall be connected

in series,not connected in parallel to avoid from

damaging the meter or endangering personal safety.

2.When measuring DC current, if the test leads are

reversely connected to the circuit , the display will

change into negative,but not affect measuring accuracy.

6. Maintenance

To avoid electrical shock,remove test leads before

replacing battery or fuse and cleaning.

Warning

6.2 Fuse Replacement

The step of replacing fuse is:

1.Switch off the power.

2.Open lower cover with screwdriver to take out the

broken fuse.

3.Load the fuse with same Electrical specifications

(FF400mA H 600V,10KA ) ,recover battery cover

and make the screw fixed.

6.3 Cleaning

When the meter surface is required to clean, please

use soft cloth, don't use organic solvent with corrosive

and solvent action to the case.

R-00-05-1383

• Before removing the rear cover, disconnect the probe from

the circuit to be measured.

To protect the internal circuit, replace the fuse with one of •

the same specification: FF 400mA H 600V,10KA

Don't use the instrument until the rear cover is placed back •

and the screws are tightened.

Clean the housing of instrument only with a wet rag dripped •

with little detergent but never chemical solution.

In case of any abnormality, stop using it and sent it for •

maintenance.

6.1 Replacing The Batteries

WARNING

To avoid electric shock, make sure that the test

leads have been clearly move away from the

circuit under measurement before opening the

battery cover of the meter.

6.1.1 If the sign “ ” appears, it means that the

batteries should be replaced.

6.1.2 Loosen the fixing screw of the battery cover and

remove it.

6.1.3 Replace the exhausted batteries with new ones.

Note:

Do not reverse the polarity of the batteries.

WARNING

Do not mix old and new batteries. Do not mix

alkaline, standard (carbon-zinc), or rechargeable

(ni-cad, ni-mh, etc) batteries.

6.1.4 Put the battery cover back and fix it again to its

origin form.

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