MULTI MEASURING INSTRUMENTS CO.,LTD. MCL-500IRV User manual

Io/Ior CLAMP LEAKER
MCL-500IRV
INSTRUCTION MANUAL
Thank you very much for selecting our Io/Ior clamp leaker
model MCL-500IRV.
This model is complex instrument and employs a very reliable
mechanical/electronic design.
Before you use your new instrument, read this instruction
manual completely and familiarize yourself thoroughly with
all functions and 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, 101-0025 Japan
TEL : [phone] FAX : [phone]
Home Page : http://www.multimic.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.
△
！WARNING
POSSIBLE ELECTRICAL SHOCK
●This instrument is for the use of low voltage circuit.
●Do not make measurements in the circuit 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 the bare cables.
POSSIBLE ELECTRICAL SHOCK OR ACCIDENT
●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 the battery
cover is off, do not operate this instrument.
●Do not give a shock to the tip of CT.
●Do not disassemble this instrument.
●Replace the batteries after took off test probe, etc. from the circuit.

SPECIFICATIONS
1. CURRENT DETECTION ZCT
Inside diameter : Φ40mm
Method : Split core type ZCT
Withstanding voltage : AC 2200V/1 minute between CT core and grip
2. MEASURING PART
Measuring function : Leakage current (Io), Line current (I),
Resistive leakage current (Ior), AC Voltage (V)
Measuring method : Clamp CT (in case of Ior, based on voltage standard
to be inputted directly or by non-contact voltage
sensor)
Measuring range : Io, Ior: 40mA/400mA/4A
I: 40mA/400mA/4A/40A/500A
V: 500V
Input frequency range : 50Hz/60Hz (auto)
AC current detection : I,Io,V: True RMS by analog operation
Ior: RMS by synchronous dual integration mode
AD conversion : Successive approximation method
Display change : By rotary switch
Display : LCD, max.9999 reading with annunciator
Data hold indication : “DH”mark on LCD
Sampling rate : 2 times/sec.
Overrange indication : “OL”mark on LCD
Low battery indication : "B" mark on LCD
Auto power off :Approx. 10 minutes after power on
Filter/V Input Switch :When pressing this switch once at I, Io current
measurement, “FL” mark on LCD and high
frequencies are cut off. By pressing once again, this
function will be released. In case of Ior measurement,
this switch is ineffective.
By pressing this switch at Ior measurement, “Direct
Voltage Input” or “Non-contact Voltage Input” can be
selected. [Ld] mark on the right upper side of display
means direct voltage input and [no] display shows
non-contact voltage input.
Ior Switch : In case of measuring Ior current, press this switch
and then, set the circuit condition to be measured by
Ior SELECT switch.
Circuit voltage : less than 600V (isolated wire)
Operating temperature : 0~40oC < 85%RH (without condensation)
Storage temperature : －10～60 oC < 70%RH (without condensation)
Consumption current : 13mA (approx. 48h for continuous use)
Power supply : AAA alkali battery LR03×3
Dimension/Weight : 70(W)×223(H)×34(D)mm, approx. 440g
Accessories : Battery LR-03 (installed into the instrument)/3pcs.
Carrying Case/1pce., Instruction Manual/1pce.
Test Lead for direct voltage input/1set
Non-contact voltage input sensor/1pce.

Accuracy (23 oC±5oC, less than 85%RH)
Leakage current (Io), Line current (I), Resistive leakage current (Ior), Voltage (V)
Range
Resolution
Display
Accuracy
I, Io
40mA
0.01mA
0.40mA~39.99mA
±1.0%rdg±10dgt
400mA
0.1mA
40.0mA~399.9mA
±1.0%rdg±10dgt
4A
0.001A
0.4A~3.999A
±1.0%rdg±10dgt
40A
0.01A
4.0A~39.99A
±1.0%rdg±10dgt
500A
0.1A
40.0A~499.9A
±1.0%rdg±3.0%FS
Ior
(direct)
40mA
0.01mA
0.40mA~39.99mA
±1.5%rdg±15dgt
400mA
0.1mA
4.0mA~399.9mA
±1.2%rdg±15dgt
4A
0.001A
0.04A~3.999A
±1.2%rdg±15dgt
40mA
0.01mA
0.40mA~3.99mA
±3.0%rdg±20dgt
4.00mA~39.99mA
±1.5%rdg±15dgt
Ior
400mA
0.1mA
4.0mA~39.9mA
±3.0%rdg±20dgt
(non-
40.0mA~399.9mA
±1.5%rdg±15dgt
contact)
4A
0.001A
0.040A~0.399A
±3.0%rdg±20dgt
0.400A~3.999A
±1.5%rdg±15dgt
V
500V
0.1V
10.0V~499.9V
±1.0%rdg±8dgt
※The conductor must be located at the center of CT.
※Input voltage for Ior measurement.
※The accuracy of Ior is based on the phase angle with 0°between the voltage
and current at the standard voltage of AC100V in case of single phase. In case
of 3P/3W, it is based on the phase angle with 300°between the voltage and
current at △wiring and the standard voltage of AC200V.
※The accuracy of non-contact Ior is based on the inputted voltage by standard
non-contact voltage sensor.
※At each range, the value less than 9 count becomes “0” display compulsively
(zero suppression).
※The specifications, dimensions, etc. subject to change due to product
improvement, etc.

NAME OF EACH PART AND EXPLANATION
|<34>|
①Clamp Type ZCT : Sensor for detecting current and clamp method.
②Open/Close Lever : CT will open by pushing this lever to inside.
③Power Switch (POWER) : By pressing this switch, the power becomes on and
pressing once again, power off.
④Ior SELECT Switch : Setting for single phase or 3 phase/3 wires (200V).
By pressing this switch, [1φ] lightens on LCD in case
of single phase and [ Δ] on display in case of 3
phase/3 wires.
⑤FILTER/V Input Switch : By pressing this switch at I. Io current measurement,
[FL] mark on the display and high frequencies will be
cut off. By pressing once more, this function will be
released. In case of Ior measurement, this function is
ineffective.
By pressing this switch at Ior measurement, direct
voltage input or non-contact voltage input can be
selected.
In case of [Ld] mark on the right upper side on display,
direct input is selected and in case of [no] mark on
display, non-
⑥Ior Switch : For Ior current measurement, press this switch once
and set the circuit condition to be measured by
pressing Ior SELECT Switch.
⑦LCD Display : Display of measured values, measuring conditions,
battery situation, etc.

⑧Range Switch : Switch for current & voltage range (40mA, 400mA, 4A,
40A, 500A, 500V).
⑨Voltage Input Terminal : Red & Black terminals for voltage measurement and
(Red, Black, Green) direct voltage input for measurement of resistive
leakage current (Ior).
For the measurement of line voltage, set the range
switch to 500V. (voltage measurement is unable by
non-contact voltage input sensor).
For Ior current measurement, connect red terminal to
V1 and black terminal to N in case of single phase.
In case of 3 phase/3 wires, connect red terminal to R
phase and black to T phase.
In details of wiring on Ior leakage current
measurement, refer to each [Wiring Method].
⑩Data Hold (D-HOLD) : By pressing one time, DH (Data Hold) on LCD and it
will be released by pressing one more time.
⑪Battery Cover (the reverse side) : Remove this cover to replace the batteries.
⑫Hand Strap : During measurement, avoid to fall down the instrument
by using this strap.

REPLACEMENT OF BATTERIES
△
！WARNING
POSSIBLE ELECTRICAL SHOCK OR ACCIDENT
●Do not replace the batteries under the conditions of clamping CT to the
conductor and inputting voltage to the terminals.
●Do not operate the instrument with battery cover off.
△
！CAUTION
When not using the instrument for a long period, remove the batteries and keep
separately. The batteries may leak and may cause damage to the instrument.
●「B」sign will appear on the display when batteries are exhausted and get less
than operation voltage. Replace to new batteries immediately.
●Do not use the batteries mixed new one and once used and or different kind ones.
〔How to replace the batteries〕
●Remove the screw fixing battery cover
at the bottom of rear case by + driver
and slide & remove the battery cover
to the direction of arrow mark.
●Pick up the exhausted batteries.
●Confirm the polarities and put the new
batteries.
●Replace the battery cover to the original
position and fix screw by driver.

MEASUREMENT
For the safety operation, keep and pay attention to the cautions and warnings stated in
this manual.
△
！WARNING
POSSIBLE ELECTRICAL SHOCK
●This instrument is for the use of low voltage circuit.
Do not make measurements in the circuit more than AC 600V.
Before use, check and confirm the voltage of circuit to be measured.
POSSIBLE ELECTRICAL SHOCK OR ACCIDENT
●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 use the instrument, leaving the battery cover off.
●If excessive current is applied to the CT, the instrument will be heated and
damaged. Do not apply more than 50Arms to the CT part.
●Do not apply more than AC500V to the voltage input terminals.
(1) Line Current Measurement
1) Press POWER ③switch once.
2) Set the measuring range by Range Switch ⑧.
(In case of current ranges, choose larger range
than expected).
3) Open clamp jaw and clamp ZCT to the conductor
to be measured and close CT completely.
4) Read the displayed value (in case of over range,
「ＯＬ」mark on display).
In the place where hardly can read the display,
use data hold function.
5) In order to cut high frequencies, press FILTER Switch ⑤.
NOTE:
For line current measurement, clamp CT to one conductor. In case of clamping
CT to cabtyre cable, parallel line, etc. in a lump, line current cannot be measured.
The power will become automatically off approx. 10 minutes after the switch
operation due to auto power off function.
Measurement of line current cannot be done on Ior current mode.

(2) Leakage Current Measurement
1) Measurement at grounding line
Do the same method as for line current measurement.
2) Measurement for other circuit except for grounding line
The operations are the same as for line current but clamp CT to 2 wires en bloc in
case of single phase and 3 wires en bloc in case of 3 phase.
(3) Voltage Measurement (500V Range)
1) Press POWER switch ③once.
2) Set the range switch to 500V.
3) Insert the test leads into the voltage input
terminals ⑨(Red & Black).
4) Connect the test lead clips to the circuit to
be measured.
5) Read the displayed value.
△
！WARNING
Do not apply the voltage more than 500V AC to the voltage input terminals
(~VINPUT). It may cause breakage
POSSIBLE ELECTRICAL SHOCK
●Measuring test leads are consumable articles. Confirm there is no damage at
insulation coating of the wire before use. When having found unusual point,
stop the use and repair or replace to the new one.
POSSIBLE BURNING & WOUND
●Connect the lead wires correctly & firmly.
It may cause spark by mis-connection.
Red
Black
Red
Black

(4) Resistive Leakage Current (Ior) Measurement
ATTENTION FOR MEASUREMENT
* The range of Ior is connected with ~A range. Firstly, measure Io current at ~A
range and then, measure Ior current at the same range. (In case of Io value at
40mA range, measure Ior at 40mA range. In case of Io value at 400mA range,
measure Ior at 400mA range).
Max. measurable Ior current is 4A. In case of Ior current value more than 4A, it
is not reliable even getting some measured value.
*For direct voltage input, connect R phase to Red terminal and T phase to Black
terminal in case of 3 phase/3 wires (Δwiring method). Set measuring mode to 3φ
and Δmark will be on the display. In case of single phase/3 wires, connect V1 to
Red terminal and N to Black terminal. In case of single phase, input AC 100V.
* For voltage input by non-contact voltage input sensor, connect cord plugs of sensor
to the same color voltage input terminals ⑨of the instrument body.
In case of 3 phase/3 wires (Δwiring method), connect Red clip to R phase and
White clip to T phase (Δmark will be on the display by measuring mode 3φ).
In case of single phase/3 wires, connect V1 to Red terminal and N to Black
terminal. In case of single phase, input AC 100V.
* When inputting voltage by non-contact sensor, the phase angle is taken via
electrostatic capacity of the coated wires to be measured. In case of not putting
the clip part of sensor to the wires firmly, the measured values may get unstable
and may indicate unusual. Also, in case of bending coated wires, the clip sensors
cannot touch them completely. Apply the clip sensor to the straight part of wires
as much as possible.
*In case of Ior measurement, the instrument is looking for phase angles of current
and voltage. Set the CT direction correctly and make measurement accurately.
*This instrument is making measurement on live line condition and the measured
value may differ from the result measured by ordinary insulation resistance
testers.
WARNING
Do not apply the voltage more than 500V AC to the voltage input terminals
(~VINPUT). It may cause breakage
POSSIBLE ELECTRICAL SHOCK
●Measuring test leads are consumable articles. Confirm there is no damage at
insulation coating of the wire before use. When having found unusual point,
stop the use and repair or replace to the new one.
POSSIBLE BURNING & WOUND
●Connect the lead wires correctly & firmly.
It may cause spark by mis-connection.

1) Press POWER switch ③once.
2) Insert the equipped test leads for direct input or non-contact voltage input
sensor to the voltage input terminals ⑨(Red, Black, Green) according to the
colors of each lead.
3) Input the voltage and current according to the circuit to be measured. As to
details, refer to wiring method as under.
4) Select the appropriate current range by Range Switch and press Ior Switch ⑥
once. (Measure Io & Ior current at the same range. In case of 40mA range of
Io current, measure Ior at 40mA range. Max. measurable Ior value is 4A).
5) Select single phase or 3 phase/3 wires circuit by Ior SELECT Switch ④. By
pressing this switch one time, the condition will be changed. In case of single
phase, [1φ] will be displayed on LCD and [Δ] will be on LCD in case of 3
phase/3 wires.
6) Read the displayed value.
Use Data Hold function ⑩when the displayed value can be hardly read.
(Wiring Method of Direct Voltage Input Leads)
In case of Single Phase/3 Wires (Measuring Mode 1φ) [Ld] on display
Load
Load
Black
Red

E
．．
In case of 3 Phase/3 Wires (Measuring Mode: Δ)[Ld] on display
(Wiring Method of Non-contact Voltage Input Sensor)
In case of Single Phase/3 Wires (Measuring Mode 1φ) [no] on display
V!
N
V3
Loading
Device
Black
Red
Red
White
Green
Black
Red
Load
Load

E
In case of 3 Phase/3 Wires (Measuring Mode: Δ) [no] on display
R
Loading
Divice
S
E
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 number and defect point.
WARRANTY
This instrument is sent out from our factory after the sufficient internal inspections
but if you find any defect due to the fault in our workmanship or the original parts,
Please 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.
GURANTEE REGULATIONS
1.This instrument is warranted for the operation under normal use for 12 months from
the date of purchase.
2.This warranty does not cover the following defects:
a. Defect caused from the improper use and operation.
b. Defect caused from the use, operation and storage beyond the original
specifications, designs and conditions.
c. Defect caused from the renovations or repairs done by someone else than us or our
representatives.
d. Defect not caused from our responsibility.
Red
White
Green
Black
Red