MULTI MEASURING INSTRUMENTS MLD-18 User manual

Mini AC Leakage Current Clamp Indicator
MLD-18
INSTRUCTION MANUAL
Thank you very much for selecting our model MLD-18
Mini AC Leakage Current Clamp Indicator.
Before use the instrument, read this instruction manual
completely and familiarize yourself thoroughly with all
functions.
Keep this instruction manual carefully to take out
whenever you need.
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]

SAFETY SUMMARY observe by all means
●To use this instrument safely, read this "SAFETY SUMMARY" carefully and
apply the instrument correctly.
●The CAUTIONs and WARNINGs which appear on the following pages are stated
to prevent the operator & other people from the dangers and their properties from
the damages beforehand.
△WARNING : This symbol indicates the contents "Possibilities of the death or
the serious wound can be supposed" caused from mis-operations.
△CAUTION : This symbol indicates the contents "Possibilities of the injury or
only the material damage can be supposed" caused from mis-
operations.
○OPERATION ENVIRONMENT
△CAUTION
●Do not use or storage this instrument under the condition of direct rays of the
sun high temperature & humidity and or condensation, as it may cause the
deformation and or the isolation defect of the instrument.
●Do not use this instrument in the environment influenced by acids, alkalis,
organic solutions. corrosive gas, etc.
●Do not use or storage this instrument where the mechanical vibration can be
directly transmitted, as it may cause defect of the instrument.
●Do not use this instrument nearby the appliances which generate strong
magnetic field and or electric field, as it may cause mis-movement of the
instrument.
●This instrument does not have the water / dust-proof structure. Do not use this
instrument in the environment with a lot of dust and drops of water, as it may
cause defect of the instrument.
○OPERATION CONDITION & CONNECTION
△WARNING
POSSIBLE ELECTRICAL SHOCK
●This instrument is for the use of low voltage circuit.
Do not make measurements of power lines carrying more than AC 600V.
Before use, check and confirm the voltage of circuit to be measured.
●Apply only the coated cables and do not clamp bare cables.
●Do not handle the instrument in the rain, at humid place, with a drop of water
and or with wet hands.
●Do not use the instrument if the CT or CT case are damaged and if something is
wrong with the CT cables.
●Do not disassemble this instrument.
‐1‐

1. GENERAL
It can be attached to each circuit such as a distribution board to detect leakage of 15mA
or more, and to display and hold the LED.
2. SPECIFICATIONS
①Inside Diameter of CT :φ18mm
②Setting value : AC 15mA
③Accuracy :±5%for AC 15mA in 23℃±5℃80%RH or less (50/60Hz)
④Limitation of Voltage Circuit : less than AC 600V (insulated conductor)
⑤At the time of detection :The LED will blink when detection leakage current
exceeds setting value. By pressing the reset switch, the
blinking of the operation lamp can be reset.
⑥Sampling rate : 1 times/20ms
⑦Operating Temperature : 0～40℃, less than 80%RH ( non-condensing)
⑧Storage Temperature : -10～60℃, less than 70%RH ( non-condensing)
⑨Dimension & Weight : 45(W)x101(H)x23(D)mm, 70g
⑩Power supply : 1.5V(LR-44 or SR-44) battery×2. The red LED lights up
when the operating voltage is below
⑪Standard Accessories : Soft case, Batteries, Instruction manual
3. NAME OF PART & EXPLANATION
Fig.1
△CAUTION
There is a risk of damage.
●Current measurement generated heat when an overcurrent is applied to the ZCT
and can broken this instrument. Do not apply more than 20A to this instrument.
●This instrument is a precision instrument. If place mechanical stress on on the tip
ZCT, it will break down.
‐2‐
①ZCT(Jaw)
②Jaw opening lever
③Power switch
④Operation lamp
⑤Reset switch
⑥Battery voltage low indicator LED lamp
(Red)
⑦Battery cover

4. OPERATION PROCEDURE
4-1 Battery installation (Replacement of batteries)
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.
△WARNING
POSSIBLE ELECTRICAL SHOCK OR ACCIDENT
●If removes the battery case, be sure to put it back. Never make measurements
with the battery case removed as it is dangerous.
4-2 How to use
①Turn on the power switch.
②Open the clamp part, insert the all electrical circuit wires you want to measure at
once, and close the clamp part completely.
③If the operation lamp blinks during clamping, press the reset switch and turn off
the operation lamp.
④If a current exceeding 15mA flows, the operation lamp blinks and is held.
⑤Be sure to turn off the power switch after the measurement is completed.
△CAUTION
If the battery voltage low indicator LED lamp lights up during use, the battery is
exhausted and the operating voltage is below the operating voltage. Immediately
replace the battery with a new one.
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: [e-mail]
‐3‐
When replacing with a new
battery, replaces both batteries
at the same time.