MULTI MEASURING INSTRUMENTS 240+ User manual

Thank you very much for selecting our digital AC/DC current
clamp-on tester.
This model is complex instrument and employ a very reliable
mechanical/ electronic design.
Before using 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
●Useful for DCA measurement for automobile service.
●Data hold function. Especially useful when working in dark or hard to get areas.
●Ultra-compact size and highly accurate AC/DC clamp-on tester.
●Conform to IEC safety requirements.
2. SPECIFICATION
Measuring method
Dual integration mode
Display
3.5 digit LCD
Range
AC/DC 20A/200A (AC 50/60Hz)
Ranging
Manual ranging
Accuracy
AC 50/60Hz or DC, 23℃±5℃, 80% RH max.
Range
Mini. Resolution
Accuracy
AC 20A (50/60Hz)
10mA
±1.5%rdg ±5dgt(50/60Hz)
±2.0%rdg ±5dgt(40～49Hz/61～500Hz)
AC 200A (50/60Hz)
100mA
±2.0％rdg±5dgt(2.0~150.0A 50/60Hz)
±2.5%rdg ±5dgt(2.0~150.0A 40 ～49Hz/61 ～
500Hz)
±3.0%rdg±5dgt(150.1~199.9A 50/60Hz)
±4.0%rdg±5dgt(150.1~199.9A 40～49Hz/61～
500Hz)
DC 20A
10mA
±1.5%rdg ±3dgt
AC/DC CURRENT
MINI DIGITAL CLAMP-ON TESTER
MODEL 240 +
INSTRUCTION MANUAL

DC 200A
100mA
±2.0%rdg ±3dgt (0~150A)
±3.0%rdg ±3dgt (150.1~199.9A)
Jaw opening capability
30mmφ
Over range indication
“O.L” mark on LCD readout
Auto power-off function
Approx. 10 minutes later, after the power-on.
To power-on again, at first, “off” the power-switch.
Wait about 5 seconds and switching to “on” again.
Maximum indication
1999 count
Low battery indication
"B" mark on LCD readout
Data hold indication
"D･H" mark on LCD readout
Sampling time
Approx. 2 times/sec.
Limitation of circuit voltage
Less than AC/DC 600V
Withstanding voltage
AC 1000V/1 minute between CT core and outer
case
Insulation resistance
10MΩor more between internal circuit and CT
core.
Operating temperature
0℃to +40℃, ＜80%RH (non-condensing)
Storage temperature
-10℃to +60℃, ＜70% RH (non-condensing)
Power supply
LR-44(1.5V)x2
Power consumption
Approx. 7mW
Battery life
Approx. 16 hours (LR-44)
Size
44(W)x148(H)x20(D)mm
Weight
Approx. 100g
Accessories
Batteries (LR-44)………….2
Instruction manual……..…1
Soft case……………….…….1
3. 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 with CAUTION as dangerous voltages may
be present in normally safe areas.
●To avoid electrical shock, use with CAUTION when working above 60V DC or
25V AC-rms. Such voltages pose a shock hazard.
●Never make measurements without the battery cover.
●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.

4. DIMENSIONS AND PANEL FUNCTION
①Current transducer(Jaw) ⑦Zero adjustment knob
②Jaw opening lever ⑧Battery cover
③Range switch ⑨AC/DC switch
④Data hold switch ⑩Power switch
⑤LCD display
⑥Wrist strap
5. METHOD OF MEASUREMENT
①Set the power switch to “ON” position.
②Set the AC/DC switch to AC or DC depending upon the signal to be measured.
Note: In AC current measurement, even if “1” is displayed in the least digit
without input, it is not abnormal and no influence for the measurement accuracy.
③Set the range switch to the desired range.
④Adjust the zero adjustment knob to read zero for DC current measurement.
⑤Clamp the conductor of the circuit under test with current transducer.
Note: Clamp around only one conductor in the circuit to be measured.
⑥Read the displayed value.
⑦After measurement, set the power switch to “OFF”.
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 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.
Pull up Place batteries with positive side up
Fig.2 Fig.3
REPAIR SERVICE
When requesting for repair service, please bring the instrument directly to the dealer
where you bought.
When mailing the instrument, always pack it in its original or equivalent packing
materials to avoid any damage during the transportation and also put together with
documents showing your name, address, phone numbers and defect points.
WARRANTY
This instrument is sent out from our factory after the sufficient internal inspections,
but if you found any defects due to the fault in our workmanship or the original parts,
contact the dealer where you bought the instrument.
The warranty period is 12 months from the date of purchase and the instrument shall
be repaired at free of charge, provided that we judge the cause of defect is obviously
resulted from our responsibility.
MULTI MEASURING INSTRUMENTS CO.,LTD.
Akihabara Murai Bldg., 7F, 1-26 Kanda Sakuma-cho,
Chiyoda-ku, Tokyo,101-0025 Japan
TEL : [phone] FAX : [phone]
Web Page : http://www.multimic.com/
E-mail : [email protected]