MULTI MEASURING INSTRUMENTS M-2010 Instruction Manual

AC CURRENT

DIGITAL CLAMP-ON TESTER

MODEL M-2010

INSTRUCTION MANUAL

Thank you very much for selecting our digital AC clamp-on

tester.

This model is complex instrument and employ a very reliable

mechanical/electronic design.

Before you use your new instrument, read this Instruction

Manual completely and familiarize yourself thoroughly with

all functions. With proper use and care, your tester will give

you years of satisfactory service.

MULTI MEASURING INSTRUMENTS CO.,LTD.

Akihabara Murai Bldg. 7F, 1-26 Kanda Sakuma-cho,

Chiyoda-ku, Tokyo, Japan, 101-0025

TEL : [phone] FAX : [phone]

Home Page : http://www.mutimic.com/

E-mail : [e-mail]

1. FEATURES

● Multi functional clamp-on tester.

● Additional AC/DC voltage, resistance, diode test and continuity check.

● Data hold and auto power off function.

2. △

!

WARNING

● Do not make measurements of power lines carrying more than 250V.

IN SOME CASES, POWER LINES MAY CARRY VOLTAGE SPIKES OF
SEVERAL TIMES OF THE NORMAL SUPPLY VOLTAGE. THIS
INSTRUMENT SHOULD NOT BE USED TO MEASURE POWER LINES.
*The term of “POWER LINE” means the electrical circuit providing the power to

factories, buildings, and etc.

● Before operating this instrument, familiarize yourself with all instructions

outlined in this manual.

● Always check to make sure that the function switch is set to the proper position.

● When making measurements, use CAUTION as dangerous voltages may be

present in normally safe areas.

● To avoid electrical shock, use CAUTION when working above 60V DC or 25V AC

rms.
Such voltages pose a shock hazard.

● Never make measurements with the case opened.

● Never fail to keep the maximum tolerable input.

● Never operate this instrument if it becomes wet, damp or has any liquid

condensation build-up on any part of the instrument.

● Never make measurements for uninsulated conductors or bus bars.

3. SPECIFICATIONS

Safety standard : Meets the requirements for double insulation to IEC 1010-2-032,

IEC 1010-1(1995), EN 61010-1(1995) installation Category Ⅲ

600V phase to earth.
E.M.C. standard : The instrument meets EN 50081-1 and EN 50082-1(1992)
Withstanding voltage : AC 5500V, 1 minute (between outer case and core of CT)
Measuring method : Dual integration mode
Jaw opening capability : 40mmφ
Display : 3 1/2 digit LCD max. reading of 1999 and annunciators
Over range indication : Blanking of all digits except MSD1 (Except AC/DC 600V

and AC 600A range)
Low battery indication : "B" mark on LCD readout
Sampling : 2 times/s
Data hold indication : "D･H" mark on LCD readout
Auto power off : The meter is set to power off mode approx. 10 minutes after the

power switch on.

Operating temperature : 0℃ to 40℃, ＜80%RH (non-condensing)
Strange temperature :‐10℃ to 60℃, ＜70%RH (non-condensing)
Power supply : 1.5V (“ AAA” size, R03) x2
Power consumption and battery life : Approx. 3.5mW, 500 hours continuous.
Size : 70(W)x223(H)x34(D)mm
Weight : Approx. 425g
Accessories : Carrying case…………..1

Instruction manual……1
Batteries…………………2
Test lead…………………1set

Measuring range (23℃±5℃, ＜80% RH ) :

Range

A

ccuracy Max. input

~A

(50/60Hz)

Manual range

20A

±1.5% rdg±10 dgt

AC 600A

200A

〃

600A

±1.0% rdg±8 dgt

~V

(50/60Hz)

… V

Auto range

2V

±0.7% rdg±5 dgt

AC/DC

600V rms

20V

±1.2% rdg±5 dgt

200V

〃

600V

〃

Ω

(OHM)

Auto range

200Ω ±1.2% rdg±5 dgt

Input protection

250V rms

2KΩ 〃

20KΩ 〃

200KΩ 〃

2000KΩ 〃

20MΩ ±3% rdg±10 dgt

･))) Continuity

check

2KΩ

Continuity beeper
＜Approx. 300Ω

250V rms

|

Diode test

2V

±10% rdg±3 dgt

250V rms

4. DIMENSIONS AND PANEL FUNCTION

①Current transducer(Jaw)
②Jaw opening lever

③Power switch
④Range selector switch

⑤Data hold switch
⑥LCD display
⑦Input terminal(V)

⑧COM terminal

⑨Input terminal(Ω)(

｜)

⑩Battery cover

○

11

Wrist strap

5. METHOD OF MEASUREMENT

5-1. Measurement of AC Line Current

① Set the power switch to "ON" position.
② Set the range selector switch to a range

appropriate to the current to be measured.
Start the measurement at top range and
then work down to lower range.

③ Clamp the conductor of the circuit at the

center of CT.

④ Read the current value in the display.
⑤ If you make measurements in a dark place

or in a place where it is difficult to see the
readings, use the data hold switch. Fig.1

Note : Clamp around only one conductor of the circuit to be measured. (See Fig.1)

When making the clamp measurements for high AC current, the noise sound
of CT may be caused, however, this is not abnormal.

△

!

WARNING

● To avoid electrical shock or damage, the measurement is limited to the circuit

under 600V AC.
Such voltages pose a shock hazard.

● Never fail to keep the maximum 600A input to avoid electrical shock or damage.

● Never make measurements for uninsulated conductors or bus bars.

5-2. Measurement of Voltage

5-2-1. Measurement of AC Voltage

① Set the power switch to "ON" position.
② Connect the plug of red test lead into

the “V” terminal and the plug of black
test lead into the “COM” terminal.

③ Set the range selector switch to “ACV~”

range.

④ Contact the tips of the test leads to the

circuit under test.

⑤ Read the voltage value in the display. Fig.2

5-2-2. Measurement of DC Voltage

① Set the power switch to "ON" position.
② Connect the plug of red test lead into the “V” terminal and the plug of black test

lead into the “COM” terminal.

③ Set the range selector switch to “DCV …” range.
④ Contact the tips of the test leads to the circuit under test.

⑤ Read the voltage value in the display.

△

!

WARN IN G
Do not make measurements of power lines carrying more than 250V.
IN SOME CASES, POWER LINES MAY CARRY VOLTAGE SPIKES OF

SEVERAL TIMES OF THE NORMAL SUPPLY VOLTAGE. THIS

INSTRUMENT SHOULD NOT BE USED TO MEASURE POWER LINES.

* The term of “POWER LINE” means the electrical circuit providing the

power to factories, buildings, and etc.

△

!

WARN IN G

POSSIBLE ELECTRICAL SHOCK. Do not make measurements if the case

is damaged or the rear case is removed. Remove all electrical inputs before

removing the rear case.

△

!

WARN IN G

POSSIBLE ELECTRICAL SHOCK or FIRE HAZARD. Do not expose this

tester to rain or moisture. Do not operate the tester in the presence of

flammable gases or fumes.

△

!

CAUTION
To avoid damage to the tester, disconnect test leads before changing

functions. Do not exceed the maximum input limits.

5-3. Measurement of Resistance and Continuity Check

① Set the power switch to "ON" position.
② Connect the plug of red test lead into

the “Ω” terminal and the plug of black
test lead into the “COM” terminal.

③ Set the range selector switch to “Ω” or

“･

))) 2K Ω” range.

④ Contact the tips of the teat leads to the

circuit under test.

⑤ Read the resistance value in the display. Fig.3

In continuity check, if the circuit under test has a resistance of less than
approximately 300Ω, the continuity beeper will sound.

△

!

CAUTION

Be sure all voltage is turned OFF in the circuit before making resistance

measurement.

5-4. Measurement of Diode

① Set the power switch to "ON" position.
② Connect the plug of red test lead into the “

｜” terminal and the plug of black

test lead into the “COM” terminal.

③ Set the range selector switch to “

｜” range.

④ Contact the tips of the test leads to the diode under test.

Fig.4

As shown in Fig.4 (a), when measuring the forward voltage across the diode, a

normal diode will indicate 0.4 to 0.7V and, as shown in Fig.4 (b) the reverse voltage
will indicate a value near 1,500. For a short-circuited diode, a value near 0mV will be
displayed.

△

!

CAUTION

Be sure all voltage is turned OFF in the circuit before making diode test.

6. REPLACEMENT OF BATTERIES AND FUSE

When the battery voltage falls below a specified voltage value, the "B" mark will

appear in the display. If this occurs, replace the two batteries with new ones as

quickly as possible.
Turn the power switch to "OFF", prior
to installing batteries.

To install the batteries, remove the

battery cover located on the unit back.

Loosen the screw on the battery cover.
Replace the two batteries (UM-4 or

type AAA) with new ones, observing
polarity. Use high-quality batteries
which are guaranteed against leakage.
If the instrument is to be left unused
for long periods of time, to prevent
damage from leakage, remove the batteries.

△

!

WARN IN G
Before changing batteries or fuse, removal all electrical input.

7. MAINTENANCE

When making requests for repair service, please bring the instrument directly to the

dealer. If this is impossible, however, send the instrument directly to our sales office.
When mailing this instrument, always pack it in its original or equivalent packing
material and pack together with name, address, telephone number and the warranty
documentation.

● To ensure speedy and reliable repair, always include information as the type of

failure and cause.

● If required, always return accessories with the instrument.

● When contacting us, provide the model number and serial number of your

instrument.