Multi 600 User Manual

AC/DC CLAMP-ON MILLIAMMETER

Instruction MODEL 600

Manual

Thank you very much for selecting our model 600 digital

AC/DC clamp-on tester.

This model is a complex yet easy to use instrument and

employs a very reliable mechanical/electronic design.

Before using your new instrument, read this Instruction

Manual thoroughly and familiarize yourself with all the

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

years of satisfactory service.

MULTI

Contents

1. FEATURES・・・・・・・・・・・ ・・・・・・・・・・・・・ 1

2. SAFETY SUMMARY ・・・・・・・・・・・・・・・・・・・・ 1

3. SPECIFICATION ・・・・・・・・・・・・・・・・・・・・・・ 2

3-1 General Specification ・・・・・・・・・・・・・・・・・・・ 2
3-2 Measuring Range ・・・・・・・・・・・・・・・・・・・・・ 2

4. DIMENSIONS AND PANEL FUNCTION ・・・・・・・・・・・ 3

5. METHOD OF MEASUREMENT ・・・・・・・・・・・・・・・ 5

5-1 Preparation and Caution before Measurement ・・・・・・・・ 5
5-2 Method of Measurement ・・・・・・・・・・・・・・・・・・ 5
5-3 Relative Readings ・・・・・・・・・・・・・・・・・・・・・ 7
5-4 MAX/MIN HOLD Measurement ・・・・・・・・・・・・・・・7

6. REPLACEMENT OF BATTERIES ・・・・・・・・・・・・・・ 8

7. MAINTENANCE ・・・・・・・・・・・・・・・・・・・・・・ 8

1. FEATURES

● Extremely high accuracy AC/DC current measurements from 1mA to 10A without
breaking the circuit.

● MAX HOLD and MIN HOLD function provides the monitoring function for
maximum current measurements.

● Automatic zero adjustment function by micro computer for easy operation.

● The double shielding of CT provides minimum influence by the external magnetic

field interference.

2. SAFETY SUMMARY

The WARNINGs which appear on the following page must be followed to ensure
operator safety and to retain the good operating condition of the tester.

Safety Symbols :

△

!

Indicates the operator must refer to an explanation in this manual.

Indicates terminals at which dangerous voltage may exist.

△! WARNING

● To avoid electrical shock, exercise CAUTION when working with more than 60V

DC or 25V AC rms since the danger of electric shock may exist. In addition, check
that the test leads are in normal condition.

● POSSIBLE ELECTRICAL SHOCK. Do not make measurements if the case is
damaged or the battery cover is removed. Remove all electrical inputs before the
battery cover.

● 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.

● Do not exceed the maximum input limits.

● Never clamp the conductor of the circuit carrying 300V or greater.

● Never make measurements for uninsulated conductors or bus bars.

‐1‐

3. SPECIFICATION

3-1. General Specification

Measuring sensor : Hall effect

Measuring function : DC current, AC current (true rms reading) with automatic zero

adjustment, max, hold, min, hold, data hold, auto power off
Display : 3.5 digit LCD, max. reading of 1999
Range : AC/DC 200mA, 2000mA, 10A
Sampling time : 1.6 times/sec.
Over range indication : “OL” mark on LCD readout
Data hold indication : "D･H" mark on LCD readout
Low battery indication : "B" mark on LCD readout
Limitation of circuit voltage : Less than AC/DC 300V
Withstanding voltage : AC 2300V/1 minute max. between the core of CT and outer

case.
Operating temperature : 0℃ ~ 50℃, ＜80%RH (non-condensing)
Storage temperature : -20℃ ~ 60℃, ＜75% RH (non-condensing)
Power supply : 1.5V (“AA” size, UM-3) x 2
Battery life : 120 hours or more (Alkaline)
Auto power off : The meter is set to power off mode approx. 10 minutes after the

power switch on.
Size : 76(W)x194(H)x30(D)mm
Weight : Approx. 340g
Accessories : Carrying case:……………..1

Instruction manual………1
Batteries……….…………..2

3-2. Measuring Range

Note : Electrical characteristic (18℃ ~ 28℃, 80%RH max.)

Range Input Resolution

A

ccuracy

ACA

200mA 0~199.9mA

100μA ±1.0%rdg±5dgt (50/60Hz)

2000mA 0~1999mA 1mA

±1.0%rdg±5dgt (50/60Hz)

10A 0~9.99A 0.01A

±1.0%rdg±10dgt (50/60Hz)

DCA

200mA

0~±199.9mA 100μA ±1.0%rdg±3dgt±(3%rdg‡)

2000mA

0~±1999mA

1mA

±1.0%rdg±3dgt±(3%rdg‡)

10A

0~±9.99A

0.01A

±1.0%rdg±10dgt±(3%rdg‡)

‡: Error by hysteresis of hall effect.

‐2‐

4. DIMENSIONS AND PANEL FUNCTION

‐3‐

① Current tra

nsducer (Jaw)

② Jaw opening lever
③ Power switch : Press this switch for power ON or OFF. The meter is set to

power off mode at approximately 10 minutes after the power

switch on. However, in max. hold and min. the auto power off
mode is cancelled.

④ DCA selector switch : Press this switch to select DCA measurements.
⑤ ACA selector switch : Press this switch to select ACA measurements.
⑥ RANGE UP switch : Press this switch to select the range up.
⑦ RANGE DOWN switch : Press this switch to select the range down.
⑧ ZERO ADJ switch : In DCA measurement, this switch is used for zero

adjustment. In ACA measurement, when this switch is

pressed, the input applied at that time is stored as zero
reference point. Subsequent readings display deviations
from this reference point. To release, press DCA/ACA
selector switch or RANGE UP/DOWN switch.

⑨ DATA HOLD switch : This switch locks the display. When pressed. “DH” mark

is displayed. To release, press the switch again to release
the hold condition.

⑩ MAX HOLD switch : Press this switch to select the maximum value

measurement. When pressed, “MAX-H” mark is
displayed. To release, press the switch again.

⑪ MIN HOLD switch : Press this switch to select the minimum value

measurement. When pressed, “MIN-H” mark is
displayed. To release, press the switch again.

⑫ LCD display
⑬ Battery cover
⑭ Wrist strap

‐4‐

5. METHOD OF MEASUREMENT

5-1. Preparation and Caution before taking Measurement

● A

void using the tester in places subj

ect to high temperatures, humidity or

excessive vibration.

●

Before measurements, be sure the data hold switch is set to "OFF

". (It is

impossibl

e to make measurements if the data hold switch is set to "ON"

.)

●

Remove the battery if the tester will not be used for

a long period of time.

△

!

WARNING

● T

o avoid electrical shock, exercise CAUTION when working with more than 60V
DC or 25V AC rms since the danger of electric shock may exist. In addition, check
that the test leads are normal condition.

● POSSIBLE ELECTRICAL SHOCK. Do not make measurements if the case is
damaged or the battery cover is removed. Remove all electrical inputs before
removing the battery cover.

● 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.

● Do not exceed the maximum input limits.

● Never clamp the conductor of the circuit carrying 300V or greater.

● Never make measurements for uninsulated conductors or bus bars.

5-2. Method of Measurement

Important Note :

Model 600 employs the hall effects for the CT censor. The characteristics of the hall
effect have a hysteresis due to magnetization. It means the zero adjustment point is
varied in DC current measurement. To eliminate this effect, open and close the jaws
several times to discharge and always press zero adjustment switch before measure-

ments.

For reference, when DC 10A conductor is clamped, 100mA indication by magnetization
is observed in our test.
The high sensitive hall effect sensor is used in CT. When clamping the conductor, open
and close the jaws slowly and firmly to avoid the impact to the sensor.

‐5‐

① Set the POWER switch to "ON". The function is automatically set to DC

200mA range.

② Set the ACA/DCA selector switch to ACA or DCA depending upon the signal to

be measured.

③ Set the range to the appropriate range using RANGE UP or RANGE DOWN

switch.

④ Press ZERO ADJ switch to read zero for the DC current measurement. When

pressed, “ZERO ADJ” mark is displayed. In DCA measurement, always carry
out the zero adjustment before measurements. To repeat the zero adjustment,
press to release RANGE UP or RANGE DOWN switch.

⑤ Clamp slowly and firmly around the conductor of the circuit under test with

the current transducer.

⑥ Taking measurements in a dark place or in a place where it is difficult to see

readings, use the data hold switch.

⑦ Read the displayed value.
⑧ After measurement, set the POWER switch to “OFF”.

CAUTION
The various numerals are indicated in the display in DC current measurement, even
when the clamp transducer (Jaw) is opened or closed without any input. However, this
is not abnormal. Always carry out the zero adjustment before measurements.

Note : Clamp around only one conductor in the circuit to be measured for the line

current or earth line measurement.

To measure a leakage current in a single-phase electric circuit, clamp the

two conductors together. Or clamp the three conductors together in the case
of the three-phase electric circuit.

CAUTION
Nev

er fail to keep the maximum tolerable input.

To avoid electrical shock or damage, the measurement is limited to the circuit 20A DC

or AC rms.

‐6‐

5-3. Relative Readings

If the ZERO ADJ switch is pressed in ACA measurement mode, the input applied at

the time is stored as a zero reference point.

① When ZERO ADJ switch is pressed under the clamping condition, “ZERO ADJ”

mark is displayed with the indication of 0.0, 0 or 0.00.

② The deviations from this point are displayed for subsequent measurement.

5-4. MAX/MIN HOLD Measurement

This function is used to measure the maximum value or minimum value in the

measurements. In this mode, the auto power off function is automatically canceled.

① Set the POWER switch to "ON".
② Set the ACA/DCA selector switch to ACA or DCA depending upon the signal to be

measured.

③ Set the range to the appropriate range.
④ Press the ZERO ADJ switch to read zero for the DC current measurement.
⑤ Clamp the conductor of the circuit under test with clamp transducer..
⑥ Read the displayed value. Press the MAX HOLD or MIN HOLD switch once,

“MAX-H” or “MIN-H” mark is displayed. In this mode, the maximum value or
minimum value is displayed for subsequent measurement. To release, press the
switch again.

⑦ After measurement, set the POWER switch “OFF”.

CAUTION

If ex

cessive high current is applied to the clamp transducer, the zero adjustment
is disabled due to the magnetic charge of the clamp transducer. In such case,
discharge the magnetized clamp transducer as follows.

① Set the POWER switch to "ON".
② Set the range to AC 200mA range.
③ Apply AC 10A to the clamp transducer (by clamping), and reduce the applied

current gradually to zero. The magnetic charge will be discharged.

‐7‐

6. REPLACEMENT OF BATTERIES

When the battery becomes exhausted

or drops below the operating voltage,
the "B" mark is displayed.
Set the power switch to "OFF", prior
to installing batteries.
To install the batteries, remove
the battery cover located at the
rear.

Loosen the screw on the battery cover.

Replace the batteries (AA size or
UM-3) with new ones, observing polarity.
Use high-quality batteries which are

guaranteed against leakage. If the

tester is to be left unused for a long
period of time, to prevent damage due

to possible leakage, remove the batteries.

7. MAINTENANCE

When maki

ng 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 endure 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.

‐8‐

MULTI MEASURING INSTRUMENTS CO.,LTD.

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

Chiyoda-ku, Tokyo, 101-0025 Japan

TEL : [phone] FAX : [phone]

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

E-mail : [email protected]