AC CURRENT
MINI DIGITAL CLAMP-ON TESTER
MODEL 104
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.
1. FEATURES
● This tester is a clamp-on type leakage ammeter which represents the latest in current
transducer and digital technology and is the world’s smallest and most accurate
clamp-on type instrument of its type.
● Compact and lightweight.
● This tester is least affected by the external magnetic field.
2. CAUTION
● 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 battery cover OFF.
● 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. SPECIFICATION
Measuring Method:
Dual integration mode
Display:
3.5 digit LCD max. reading of 1999
Range:
0~200mA/150A
Accuracy:
23℃±5℃, 80%RH or less
Range
Resolution
Accuracy
200mA
0.1mA
±2.0%rdg ±5dgt(50/60Hz)
150A
100mA
Jaw opening capability:
33mmφ
Over range indication:
Blanking of all digits except MSD1
Maximum indication:
1999
Low battery indication:
"B" mark on LCD
Data hold indication:
"DH" mark on LCD
Sampling time:
Approx. 2 times/s.
Limitation of circuit voltage:
Less than AC 600V
Withstanding Voltage:
AC 2000V (between the core of CT and rear
case)
Operating Temperature:
0℃ to +40℃, ＜80%RH
Storage temperature:
-10℃ to +60℃, ＜70% RH
Power supply:
SR-44 (1.55V)x2 or LR-44x2
Power consumption:
Approx. 3mW
Battery life:
Approx. 100 hours (LR-44)
Approx. 200 hours (SR-44)
Size:
54.0(W)x155(H)x20(D)mm
Weight:
Approx. 85 gs.
Accessories:
Batteries, LR-44 (1.55V)………….2
Instruction manual……………..…1
Soft case……………………….…….1
4. DIMENSIONS AND PANEL FUNCTION
①Current transducer(Jaw)
⑥Range selector switch
②Jaw opening lever
⑦Power switch
③Data hold switch
⑧Battery cover
④LCD display
⑤Wrist strap
5. METHOD OF MEASUREMENT
5-1. Preparation and Caution before Measurement
● Before making measurements, install the batteries. Two LR-44 batteries can be
used.
● Avoid using the tester in places subject to high temperatures, humidity or
excessive vibration.
● Before measurements, be sure the data hold switch is set to "OFF". (It is
impossible 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.
5-2. Measurement of Leakage Current
5-2-1 . Leakage current measurement for the grounded conductor
1) Set the power switch to "ON" position.
2) Set the range selector switch to a range appropriate to the current to be measured.
3) Clamp the conductor of the circuit under test with the current transducer.
4) 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.
5-2-2. Leakage current measurement for the single-phase or three-phase electric
circuit.
1) Set the power switch to "ON" position.
2) Set the range selector switch to a range appropriate to the current to be measured.
3) 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.
4) 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.
5-3. Measurement of 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.
3) Clamp the conductor of the circuit under test.
4) 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.
Note: Clamp around only one conductor of the circuit to be measured.
CAUTION:
This tester is designed for low voltage applications.
To avoid electrical shock or damage, the measurement is
limited to the circuit under 600V AC.
6. REPLACEMENT OF BATTERIES
When the battery becomes exhausted or drops below the operating voltage, the "B"
mark is displayed. Turn the power switch to "OFF", prior to installing batteries.
To install the batteries, remove the battery cover located on the unit back.(See Fig.2)
Insert the two LR-44 or SR-44 into the battery case making sure that proper polarity is
observed. (See Fig.3).
Always replace both batteries at the same time. If the difference between the voltages
of the batteries is big, the measurement error may be caused.
MULTI MEASURING INSTRUMENTS CO.,LTD.
Akihabara Murai Bldg. 7F, 1-26 Kanda Sakuma-cho,
Chiyoda-ku, Tokyo 101-0025 JAPAN
TEL: +81-3-3251-7016 FAX: +81-3-3253-4278
Home Page: http://www.multimic.com/
E-mail: multi@multimic.com
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