MULTI MEASURING INSTRUMENTS CO.,LTD. MCL-800IRV User manual

Io/Ior CLAMP LEAKER
MCL-800IRV
INSTRUCTION MANUAL
Thank you very much for selecting our Io/Ior clamp leaker
model MCL-800IRV.
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 : Φ80mm
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),
Insulation resistance (MΩ) [calculated value]
Measuring method : Current: by clamp CT (in case of Ior, based on
voltage standard to be inputted directly or by non-
contact voltage sensor)
Voltage: by direct voltage input probe
Measuring range : Io, I: 0～10A 4 range auto with min. resolution 0.001mA
Ior: 0～10A 4 range auto with min. resolution 0.001mA
V: 10V～500V 1 range with min. resolution 0.1V
MΩ: calculated by voltage and current values
Input frequency range : 50Hz/60Hz (manual change)
AC current detection : Dual integration method
AD conversion : Successive approximation method
Display change : By tact switch
Display : LCD, max.9999 reading with annunciator
Data hold indication : “DH”mark on LCD
Sampling rate : 2 times/sec.
Over range indication : “OL”mark on LCD
Low battery indication : "B" mark on LCD
Auto power off :Approx. 10 minutes after power on
Circuit voltage : less than 600V (isolated wire)
Operating temperature : 0~50oC < 85%RH (without condensation)
Storage temperature : －10～60 oC < 80%RH (without condensation)
Withstanding Voltage : AC2000V/1minute between CT and grip part
Consumption current : 14mA (approx. 48h for continuous use)
Power supply : AAA alkali battery LR03×3
Dimension/Weight : 71(W)×315.3(H)×37(D)mm, approx. 750g
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
10mA
0.001mA
0.010mA~9.999mA
±1.0%rdg±10dgt
100mA
0.01mA
10.00mA~99.99mA
1000mA
0.1mA
100.0mA~999.9mA
10A
0.001A
1.000A~9.999A
Ior
(direct)
10mA
0.001mA
0.010mA~9.999mA
±1.5%rdg±20dgt
100mA
0.01mA
10.00mA~99.99mA
±1.5%rdg±15dgt
1000mA
0.1mA
100.0mA~999.9mA
10A
0.001A
1.000A～9.999A
Ior (non
contact)
Single
Phase
10mA
0.001mA
0.010mA~9.999mA
±2.0%rdg±20dgt
100mA
0.01mA
10.00mA~99.99mA
±2.0%rdg±15dgt
1000mA
0.1mA
100.0mA~999.9mA
10A
0.001A
1.000A~9.999A
Ior (non
contact)
Three
Phase
10mA
0.001mA
0.500mA~4.999mA
±3.0%rdg±40dgt
5.000mA~9.999mA
±2.0%rdg±15dgt
100mA
0.01mA
10.00mA~99.99mA
±2.0%rdg±15dgt
1000mA
0.1mA
100.0mA~999.9mA
10A
0.001A
1.000A~9.999A
V
500V
0.1V
10.0V~499.9V
±1.0%rdg±8dgt
※The conductor must be located at the center of CT.
※Set the frequency of power to be measured by frequency range switch ⑦.
※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.
※During the measurement of Ior by non-contact sensor, the phase is taken via
electrostatic capacity and the plugs (Red, Green, Black) of voltage input terminal
⑩are tending to receive induction. Keep handing the instrument away from
the voltage input terminal as much as possible.
※The insulation resistance values are calculated by the formula of voltage and
current (Ior).
※Io and Ior ranges are auto but they can be changed to manual, in case of hardly
reading the displayed values due to sharply fluctuating current to be measured.
Refer to “5. Change of Current & Voltage Ranges” in this manual.

NAME OF EACH PART AND EXPLANATION
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.
④Voltage Select Switch (～V) : When the voltage input mode is direct input, the voltage
value will be displayed by pressing this switch (in case of
non-contact voltage input, the measured value will
become [-----] and the voltage measurement is not available.
When measuring Ior, the voltage input mode can be changed
(direct input or non-contact input) by operation in the
combination with ⑧Data Hold Switch.
As to the operation method, refer to “5. Change of Current &
Voltage Ranges” in this manual.

⑤Current Range Select Switch: When power switch on, the display is for Ior current
(～A) measurement. By pressing this switch once, the
display becomes Ior of single phase (1φ/Ior).
By pressing once again, the display becomes Ior ofΔ
three phase (Δ/Ior) and by pressing further once,
the display becomes Ior of Y three phase (Y/Ior).
Set this switch correctly according to the circuit to
be measured.
When measuring Ior, the current range can be changed
by operation in the combination with ⑧Data Hold Switch.
As to the operation method, refer to “5. Change of Current
& Voltage Ranges” in this manual.
⑥Insulation Resistance : By pressing this switch, the insulation resistance value
Select Switch (MΩ) will be displayed by the calculation of voltage & Ior values.
For this measurement, the direct voltage input mode
is used. In case of non-contact voltage input, the
display become [----] and the insulation measurement
cannot be done in this method.
Make circuit setting correctly (Press once is for φ1,
twice is forΔand three times is for Y).
⑦Frequency Select Switch : Set the frequency of power supply to be measured.
⑧Data Hold (D-HOLD) : By pressing one time, DH (Data Hold) on LCD and it
will be released by pressing one more time.
⑨Liquid Crystal Display (LCD): Showing measured value, measuring mode and
battery condition on the display.
⑩Voltage Input Terminal : Voltage input terminals for line voltage measurement
(Red, White, Black) (500V range) and for resistive leakage current (Ior)
measurement.
For the measurement of line voltage, set the voltage
input mode to direct and use the direct voltage input
probe (voltage measurement is unable by non-
contact voltage input sensor).
For Ior current measurement, change the voltage input mode
by operation in the combination with ⑧Data Hold Switch.
As to the operation method, refer to “5. Change of Current
& Voltage Ranges” in this manual.
In details of wiring on Ior leakage current measurement,
refer to each [Wiring Method].
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 (LR-03)
and slide & remove the battery cover Alkaline
to the direction of arrow mark. Battery x 3
●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.
Battery Cover
Screw

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.
(NOTE: At Ior range, the display value will not become 0 even in case of zero input but
it is not malfunction).
Conductor
to be measured
(1) Line Current Measurement
1) Press POWER ③switch once. All displays appear and
then, range becomes Io current measurement.(auto range).
2) Set the frequency by ⑦Frequency Select Switch to be
measured.
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.
NOTE:
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.
The current range of this instrument is auto but it can be changed to manual when
the appropriate range cannot be fixed. As to the operation, refer to “5. Current
Range Change” in this manual.

(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. All displays
appear and then, range becomes Io current
measurement.
2) Press ④Voltage Select Switch once.
Display becomes voltage (measuring mode
1φ/Ior).
3) Set the frequency to the power supply voltage
to be measured by ⑦Frequency Select
Switch.
4) Make voltage input mode to [L] direct voltage
input.
5) Insert the test leads into the voltage input
terminals ⑩(Red & White).
6) Connect the test lead clips to the circuit to
be measured.
3) Read the displayed value.
*When voltage input mode is non-contact, the voltage measurement can not be done.
As to the operation of voltage input mode, refer to “5. Voltage Input Change” in this
manual.

△
！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 direct voltage input lead wires correctly & firmly.
It may cause spark by mis-connection.
(4) Resistive Leakage Current (Ior) & Insulation Resistance (MΩ) Measurements
ATTENTION FOR MEASUREMENT
* This instrument is making measurement on live line condition and the measured
value may differ from the result measured by ordinary insulation resistance testers.
* For insulation resistance measurement, the voltage input method is different in case
of single phase, 3 phase/3 wires & 3 phase/4 wires. Refer to wiring methods and
use the instrument correctly.
*In case of Ior (MΩ) measurement, the instrument is looking for phase angles of
current and voltage. Pay full attention to the wiring method. Also, in case of
wrong setting of frequency, the phase angle will be changed and accurate
measurement cannot be done. Make frequency setting correctly.
* 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.
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. Display becomes Io current.
2) Set the power supply frequency to be measured by ⑦Frequency Select Switch.
3) Insert the equipped test leads for direct input or non-contact voltage input
sensor to the voltage input terminals ⑩according to the colors of each lead.
As to the operation of voltage input mode (direct input or non-contact input),
Refer to “5. Voltage Input Change” in this manual.
4) Input the voltage and current according to the circuit to be measured. As to
details, refer to wiring method as under.
5) Check the Io current display and press Voltage Select Switch ④once to
confirm if the voltage is inputted correctly. Press Current Select Switch ⑤
and set Ior circuit mode. Read the displayed value.
The circuit mode will be changed by pressing Current Select Switch ⑤in the
following manner:
6) To measure insulation resistance (MΩ), press Insulation Resistance Select
Switch ⑥. The display becomes [OL] in case of no voltage input.
In case of non-contact voltage input mode, the display becomes [----] and the
measurement cannot be done.
Use Data Hold function ⑩when the displayed value can be hardly read.
*CT can be applied to the grounding line also.
Load
Red
press
press
press
press
Wiring Method of Direct Voltage Input Leads
a. In case of Single Phase/2 Wires
Measuring Mode 1φ/Ior [L] on display
Red
Red
White
Load
White

*CT
*CT can be applied to the grounding line
Red
b. In case of Single Phase/3 Wires Measuring Mode 1φ/Ior [L] on display
Red
Red
White
White
Load
Load
c. In case of Three Phase/3 Wires Measuring Mode /Ior [L] on display
*CT can be applied to the grounding line
Red
White
Black
Red
Black
White
Load

*C
d. In case of Three Phase/4 Wires (Neutral Grounding) Measuring Mode Y/Ior [L] on display
Red
Red
White
White
Load
*CT can be applied to the grounding line
Wiring Method of Non-contact Voltage Input Leads
e. In case of Single Phase/2 Wires Measuring Mode 1φ/Ior [n] on display
Red
White
Load
Red
Black
Green
*CT can be applied to the grounding line

f. In case of Single Phase/3 Wires Measuring Mode 1φ/Ior [n] on display
Red
White
Load
Load
Red
Black
Green
g. In case of Three Phase/3 Wires Measuring Mode /Ior [n] on display
Red
White
Load
Red
Black
Green
*CT can be applied to the grounding line
*CT can be applied to the grounding line

*CT can be applied to the grounding line.
(5) Change of Current and Voltage Ranges
The current ranges of this instrument becomes “auto” automatically after power
switch on but when the range cannot be fixed due to large fluctuated current to be
measured, it is impossible to measure it.
In this case, fix the range manually and measure the current under manual range
condition.
*How to operate the manual ranges (Change of Current Rages)
(1)Press Power Switch ③once. All display lights and then, the range becomes Io
current measurement mode (auto range).
(2)Press Data Hold Switch ⑧once. (“DH” mark on display).
(3)Press Current Range Select Switch ⑤once. Setting Range
On the display, “10mA” and “L1” (indicating setting
range) appear at right side.
h. In case of Three Phase/4 Wires (Neutral Grounding) Measuring Mode Y/Ior [n] on display
Red
White
Load
Red
Green
Black

(4)Press Data Hold Switch ⑧once again. “DH” mark will be released and the
range becomes 10mA.
(5)To change the range continuously, press Data Hold Switch ⑧and get “DH”
mark on display. By pressing Current Range Select Switch ⑤, the range will be
changed [AUTO] –[10mA] –[100mA] –[1000mA] –[10A] sequentially.
After get proposed measuring range on display, press Data Hold Switch ⑧once.
“DH”mark disappears and the range becomes accordingly.
*After once power off this instrument and power on again, the current range
becomes [AUTO] automatically.
*How to operate the voltage input mode (Change of Voltage Input)
(1)Press Power Switch ③once. All display lights and then, the range becomes Io
current measurement mode (auto range).
(2)Press Data Hold Switch ⑧once. (“DH” mark on display).
(3)By pressing Voltage Select Switch ④, the voltage input range changes to [Direct
Input] or [Non-contact Input]. At setting range sign on LCD ⑨, “L”appears in
case of direct voltage input and “n”appears in case of non-contact voltage input.
*Table for Setting Ranges
Change of Current Voltage Input Mode (Change of Voltage Input)
Ranges Direct Voltage Input Non-contact Input
Auto L0 n0
10mA L1 n1
100mA L2 n2
1000mA L3 n3
10A L4 n4

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.