1. Before use
1.1 Safety Symbol
To use this instrument safely, the following symbols and contents are displayed on
instrument body and instruction manual.
Showing careful operation. This symbol is displayed at the point where
the references to instruction manual are required to protect operator &
Showing the high voltage output more than 1000V.
Touch to the terminal is dangerous.
WARNING: Indicating the matters to be attended to avoid electrical shock and
accidents which may affect danger to operator’s life and body.
CAUTION: Indicating the matters to be attended to avoid damage of equipment
and for general points of operation.
1.2 Caution for Operation
Thank you for selecting our digital insulation tester.
MIS-PV1 for PV systems. Before using the instrument,
read this instruction manual thoroughly and operate
properly. Keep this manual carefully whenever you can
refer if necessary.
! Do not drop and or throw the instrument at hard objects.
! Do not store the instrument at the places with high temperature more than 60oC
low temperature less than -20oC and high humidity and also, avoid the direct rays of sun.
! Do not apply chemicals like as thinner, acetone, etc. for cleaning.
! Confirm the specifications/ratings in this manual and use the instrument within the rated values,
1.3 Confirm the Accessories
Measurable insulation resistance according to the generated voltage in PV systems.
Can read the displayed value in the dark by LED back light of LCD.
Auto power off function enables min. power consumption in case of forgetting switch power off.
The output display lamp (HV lamp) serves functions as warning of outer loading voltage and or as
confirming electric discharge with superior safety and wide functionality.
After opened the box, check the appearance of instrument and confirm the accessories are contained.
2. Specifications
2.1 Measuring Part
1) Rating
Akihabara Murai Bldg. 7F, 1 -26 Kanda Sakuma-cho,
Chiyoda-ku, Tokyo 101-0025, JAPAN
TEL: +81-3-3251-7013
FAX : +81-3-3253-4278
Website: http://www.multimic.com/
Email: multi @multimic.com
Rated Measuring Voltage
Max. Effective Display Value
Center Display Value
2.2 General Specification
2) Accuracy
1) Operating Temperature
Rated Measuring Voltage/
Max. Effective Display Value
Measuring Range
[First Effective Range]
[Second Effective Range]
[First Effective Range]
[Second Effective Range]
less than ±5%
less than ±10%
: 0~40oC, less than 80%RH (w/o condensation)”
2) Storage Temperature
: -20oC~-60oC, less than 80%RH (w/o condensation)
3) Withstanding Voltage
4) Insulation Resistance
: more than 50MΩ by DC1000V insulation resistance tester
AC3700V/1 minute between electric circuit and outer case
5) Power Supply
: AA alkaline battery (LR)x6
less than ±5%
6) Outer Dimension
: 170(W)x105(D)x52(H)mm
less than ±10%
7) Weight
: approx. 350g (without batteries)
8) Accessories
: earth test lead -1, line test lead - 1, test lead case - 1, belt - 1, battery (LR6) - 6,
instruction manual -1
3) Rated Measuring Current
Range/Rated Voltage
Min. Measuring Resistance enables
to keep rated voltage
3. Operation Procedure
Rated Measuring Current
3.1 Name of Part & Explanation
4)No-loading Voltage
: less than 130% of rated voltage
5)Short-circuit Current
: less than 2mA
6)Influence of Temperature
: less than ±5%rdg at the center display by changing ambient temperature from 20 C to
±20 C.
7)Response Time
: less than 10sec.(auto range)
8)Protection of Mis-input
: nothing wrong when applying 120% of rated measuring voltage AC with nearby 50Hz
9)Display Range
: 3.200/32.00/320.0/3200(auto range)
or 60Hz sine wave for 10sec.
10)Min. Resolution
: 0.001MΩ
11)A/D Conversion
: dual integration mode
: max. 3200 count LCD with bar graph & annunciator
13)Over Range
: “OL” mark on display
14)Low Battery Indication
15)Data Hold
: “DH” mark on display
16)Auto Power Off Function
” mark on display.
: The displayed data on LCD is held by pressing this switch during measurement of insulation
resistance and it will be released by pressing switch again.
LIGHT Switch
: By pressing this switch, back light LED lightens on LCD for approx. 10 minutes. (Automatic power
saving function)
: automatically power off approx. 10 minutes after power on (to release this funciton,
set the rotary switch to “OFF” and power on again.)
17)Load Discharge Function
18)Back Light Function
: Discharging DC electrical change by auto discharge function. Can confirm discharge
by HC lamp off.
For insulation resistance measurement, the instrument is getting power-on during
: By pressing backlight switch (LIGHT) once, back light appears and by pressing switch
pressing measuring switch. By standing up this switch, it will be locked as
again. It lights off. It will become automatically approx. 10 minutes after light on.
power-on continuously.
3.2 Check of Residual Battery Power
3.4 Insulation Resistance Measurement (In PV System)
1) Confirm the range switch is at PVL.
2) If
mark is not lightening on LCD, the instrument can be operative.
3) If
mark is lightening during insulation resistant measurement. Judge the batteries
are almost exhausted.
4) In this case, replace all LR6 alkaline batteries with new ones.
1) Confirm the measuring switch MEASURE is off.
2) Set the range switch according to the generated voltage. PVL is for 500V and PVH is for
3) Disconnect solar panel (PV) from power conditioner (PCS) at the disconnecting switch.
4) Connect EARTH lead of MIS-PV1 with the earth terminal of PV system.
5) Contact LINE probe to P terminal of solar panel (at disconnector) and power on
5) In case of checking the residual battery power in the condition of max. power
MEASURE switch. (Operate the instrument with MEASURE switch standing up, as it takes
consumption, set the range switch to PVH and check by keeping test leads shorten and
a long time for the measurement. By standing up the switch, it will be locked and will get
pressing measuring switch.
power-on continuously).
After switched on MEASURE switch, the bargraph on LCD is lightening step by step and the
3.3 Battery Replacement
measured value will be displayed after all bargraph lightened and the first measurement
1) Loosen and remove the screw of battery cover by turning to the left with flat blade driver
finished. The first displayed value will be kept until finishing the second display. By pressing
or coin.
data hold switch once, the display will be hold and will be released by pressing switch again.
2) Replace the batteries, confirming (+, -) polarity according to the directions graved in
6) After finished the measurement, set MEASURE switch off and rotary range switch to off.
battery case.
7) This instrument can be used not only for PV systems but also for ordinary electric
3) In case of long time unuse, remove all batteries, as it may cause exhaustion and leakage
apparatus & equipment.
of batteries.
8) In case that one end of the object to be measured is grounded, connect with clip at
(EARTH) end. In case of not grounded, the connection at (EARTH) end is at discretion.
9) After confirmed HV lamp is not lightened by contacting (LINE) probe to the object to be
measured, the bargraph on LCD is lightening step by step and the measured value will be
displayed after all bargraph lightened.
1) Misapplication of battery polarity may cause leakage of battery and or damage of electric circuit
2) Do not disassemble batteries and do not throw them into the fire by no means as it is very dangerous.
3) Leaving batteries with wrong polarity setting may cause exhaustion and heating of batteries and they will be
damaged. Such batteries cannot be used even after correct setting.
4) Dispose the used batteries to the indicated place according to the species.
*For insulation resistance measurement in PV systems, be sufficiently careful for
electrical shock, as solar panels are generating powers successively with voltage.
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.
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.