Mastech MS2009C Manual de usuario

DIGITAL AC CLAMP METER

User Manual

MS2009C

CAT III

600 V

CONTENTS

Safety requirements................................1

Safety signs............................................1

Notes.......................................................1

Maintenance...........................................2

Overview.................................................3

Meter Indications.......................................3

Schematic Drawing For Panel

.....................5

Instructions..............................................6

Accuracy Indicators...............................10

Technical Specifications ........................11

Replace Battery.....................................15

Replace tester leads...............................16

Accessories...........................................16

ZERO

AUTO

T-RMS

C F

%mV

kM Hz

nμFAA

Safety Requirements

The digital AC/DC clamp meter has been designed

according to Safety Standard IEC61010-1

IEC61010-2-032 for electronic measuring instruments

and hand-held current clamps. It conforms to safety

standards for double insulation CAT III 600 V and

grade 2 for pollution.

Safety Signs

Important safety sign. Refer to the operation manual.

Danger high voltage.

Double insulation (Safety equipment with class II).

Ground (earth).

Allow to be used around conductors without

danger to life.

Notes

• Before using this meter, please read carefully this

user manual and pay special attention to “warning”

content. Please follow the “warning” instructions.

• To meet the safety requirements, only use probe

supplied with the meter. If the probe is replaced,

a new one with the same model or same electric

specification should be used.

• Before using it, please check the meter and probe

for any damage or abnormal condition. If an

abnormal situation appears (for example: bare

probe, enclosure damage, no liquid crystal display,

etc), don't use the meter.

• When the meter is measuring, don't touch the unused

input terminal.

• Be careful when measuring voltage greater than 60V

DC and 30V AC. Don't allow fingers to touch or block

part of the probe.

• When you can't determine the size range of signal to

be tested, please switch the function measuring range

to the maximum position, then gradually select lower

ranges until the correct range is found. Do not exceed

the input limit specified in each measuring range.

• Don't measure voltage greater than the upper limit for

each range.

• Before changing the function measuring range switch

to a different position, set the probe and the circuit

being tested to an open state.

• Before online resistance measurement, turn off all

power supplies in circuit and release all charges on

both ends of capacitor.

• Don't expose the meter exposure to strong light, high

temperature or moisture (humidity).

• Don't touch bare wires, connectors or circuits being

measured.

Maintenance

• Before opening the meter back cover, make sure that

the probe is removed from the circuit to be measured.

• Only wet cloth and a small amount of detergent can

be used for cleaning the meter. Don't use chemical

solvents to wipe the meter case.

• If you find any abnormal conditionon the meter, stoop

using the meter immediately and have it repaired.

• Repair the meter with the help of a trained technician.

The meter is a safe and reliable digital clamp

meter with stable performance. lt’s design is based

on a large scale integrated circuit double integral

A/D converter, with full measuring range of overload

protection circuit. With a unique appearance, it is a

special electrical meter with superior performance.

The meter can be used for measuring AC current,

AC/DC voltage, resistance, diode, circuit continuity

test, and non-contact voltage detection.

ZERO

AUTO

T-RMS

C F

%mV

kM Hz

nμFAA

Schematic Drawing For Panel Instructions

DC Voltage Measurement

1. Insert red probe to “INPUT” jack and insert black

probe to “COM” jack.

2. Place function measuring range switch to DC

voltage measuring range. Press “SEL” key, and

connect the probe to the power source or load to be

tested. The polarity of the end connected with red

probe will be shown in the display at the same time.

3. Read the measuring result from display.

Notes!

∆ If the range of voltage to be tested is not known in

advance, place function measuring switch to the

maximum range, then gradually reduce to obtain

the correct range.

∆ Pay special attention to avoid shock when

measuring high voltage.

AC Voltage Measurement

1. Insert red probe to “INPUT” jack and insert black

probe to “COM” jack.

2. Place function measuring range switch to AC

voltage measuring range, and connect the probe

to the power source or load to be tested. The

polarity of the end connected with red probe will

be shown in the display at the same time.

3. Read the measuring result from display.

Notes!

∆ Pay special attention to avoid shock when

measuring high voltage.

AC Current Measurement

1. Place function measuring range switch to AC

current measuring range.

2. Press the trigger, open clamp head, clip the lead

in the clamp to measure the lead current. Note:

Clamping two or more leads at the same time will

give invalid reading.

3. Read the measuring result from display.

Note:

∆ If the range of current to be tested is not known in

advance, please place function measuring switch

to the maximum current range, then gradually

reduce to obtain the correct range.

Resistance Measurement

1. Insert red probe and black probe to “INPUT” and

“COM” jack.

2. Place function measuring range switch to required

Ω position, and connect the probe to resistor to

be tested.

3. Read the measuring result from display.

Note:

∆ If measured resistance value is more than the

maximum value of chosen measuring range, it will

show will “OL`”. At this time, select a higher range.

∆ When checking online resistance, first turn off all

power supplies in the circuit to be measured and

discharge all capacitors fully.

∆ When measuring the resistance more than 1MΩ,

the reading will be stable after several seconds.

This is normal for high resistance measuring.

Diode Test

Insert red probe to “INPUT” and insert black probe to

“COM” jack. At this time, red probe polarity is “+”.

Place function measuring switch to position. Red

probe is connected to the anode of diode under

measurement, and black probe is connected to the

cathode of diode under measurement. Read

approximate forward voltage drop value from the display.

Circuit Continuity Test

Insert red probe to “INPUT” jack, and insert black

probe to “COM” jack. Place function measuring switch

to position and press SEL key to enter circuit

continuity test. Probe is connected to two points of

circuit under measurement. In continuity test, when

test resistance is less than 50Ω, buzzer will sound.

When it is from 50Ω to 90Ω, buzzer may or may not

sound. When it is more than 90Ω, buzzer won't sound.

Capacitance test

Insert red probe to “INPUT” jack, and insert black

probe to “COM” jack. Place function measuring

switch to position and press SEL key to enter

capacitance test. Probe is connected to two points

of circuit under measurement. Read the measured

capacitance on the display. If overload occurs, ‘OL’

will be shown on the display.

Note:

1: When measuring large capacitance, the display

may take a few seconds for the reading to stabilize.

2: To improve accuracy of measurement of capacitance

under 20nF, subtract the distributed capacitance of

the test leads.

9.999nF

99.99nF

9.999μF

99.99μF

999.9μF

999.9nF 0.1nF

3.2

Maintenance

Do not attempt to repair or perform maintenance on

the instrument without being an experienced

maintenance personnel in calibration, performance

testing, and relevant maintenance information.

Automatic Power-Off

In order to extend the battery life, the meter has an

automatic shutdown function. If there is no key

operation or function measuring range change

within 15 minutes, the meter power will disconnect

automatically. Press “SEL” button to return the

meter to the working state again.

To clean input jacks:

1. Turn off power to the instrument and remove test

leads from the input jacks.

2. Brush off all dirt from input jacks

3. With a clean cotton swab, use a cleaner or

lubricant (ex. WD-40) to clean input jacks.

4. Use a new swab for each jack to avoid cross

contamination.

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.

WARNING

Do not mix old and new batteries. Do not mix

alkaline, standard (carbon-zinc), or rechargeable

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

Duty Cycle

Temperature

00-05-3910

Test leads 1 pair

Accessories

User Manual

Probe

Packing box

1.5V SIZE AAA Battery

1 pcs

1 pair

1 pcs

3 pcs

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

should be replaced.

Loosen the fixing screw of the battery cover and remove it.

Replace the exhausted batteries with new ones.

Put the battery cover back and fix it again to its origin form.

Note:

Do not reverse the polarity of the batteries.

Replacing Test Leads

Replace test leads if leads become damaged or worn.

Use meet EN 61010-031 standard, rated CAT III 600V 10a,

or better test leads.

WARNING

To avoid electric shock,make sure the probes are

disconnected from the measured circuit before removingthe

rear cover. Make sure the rear cover is tightly screwed before

using the instrument.

WARNING

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