MULTI MEASURING INSTRUMENTS CO.,LTD. MIS-2D, MIS-4D, MIS-3D Instruction Manual

DIGITAL INSULATION

INSULATION RESISTANCE TESTER

Model MIS-2D/3D/4D

INSTRUCTION MANUAL

Thank you very much for selecting our digital insulation resistance tester.

This model is complex instrument and employs a very reliable mechanical/
electronic design.

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.multimic.com/
E-mail: multi@multimic. com

1. FEATURES

● MIS series are 3 ranges insulation resistance tester designed for testing of
electrical installations and equipment in accordance with IEC international

standard.

● Battery operation and heavy duty rugged case is used for high performance

insulation testing.

● The big digital and bar graph LCD display with back light enabled easy observation.

Especially, useful when working in dark place.

● Hand free and continuous measurements with custom made MΩ test switch.

● The voltage in the circuit or capacitor can be checked by warning lamp for safe
insulation measurements.

● Data hold and auto power off function.

● Ultra compact, light weight.

2. SAFETY SUMMARY

● The CAUTIONs and WARNlNGs which appear on the following pages must be
followed to ensure operator safety and to retain the operating conditions of the
instrument.

Safety Symbols:

indicates the operator must refer to an explanation in this manual.

indicates terminals at which dangerous voltages may exist.

WARNING

● To avoid electrical shock, use CAUTION when working with more than

60V DC or 25V rms.AC since the danger of electric shock exist.
In addition, check that the test leads are normal condition.

● POSSIBLE ELECTRICALSHOCK:
Do not make measurements if the case is damaged.
Make sure that the terminals and the connecting cables are in a good
condition and that the proper measuring function has been selected.

● POSSIBLE ELECTRICAL SHOCK or FIRE HAZARD:
Do not expose this instrument to rain or moisture.
Do not operate the instrument in the presence of flammable gasses or
fumes.

● This instrument must be used only by professionals. Any adjustment,
maintenance and repair of the opened apparatus under voltage shall be
carried out only by a skilled person who is aware of the hazard involved.

CAUTION
Where it is likely that the protection has been impaired, the instrument

shall be made inoperative and be secured against any unintended operation.
The protection is likely to be impaired if the instrument:

● shows visible damage.

● fails to perform the intended measurements.

● has been subjected to prolonged storage under unfavourable conditions.

● has been subjected to severe transport stresses.

3. SPECIFICATIONS

Function: Insulation resistance, AC voltage

Display: 3 1/2 digit LCD with bar graph, max. reading of 3200 count and annunciators
Response time: Less than 5 sec. (auto ranging)
Data hold indication: “DH” mark on LCD readout
Infinity indication: “OL (∞)” mark on LCD readout (over 3200 count)
Safety standard: IEC 61010-1, CAT. II 600V phase to earth
EMC standard: EN 61326
Constructional standard: IEC 61557-2
Insulation resistance: DC 500V-50MΩ or more (MIS-2D)
DC 1000V-50MΩ or more (MIS-3D, MIS-4D)
Withstanding voltage: AC 3700V/1minute, between input terminal and outer case
Low battery indication: “B” mark on LCD readout
Temperature characteristics (0~40℃): ±5%rdg of specified accuracy
Operation temperature: 0℃ to 40℃, less than 80% RH without condensation
Storage temperature: -10℃ to 60℃, less than 80% RH without condensation
Power supply: 1.5V alkaline batteries (AA size, LR-6) x 6
Dimension: 170(W) x 105(H) x 54(D)mm, approx. 365g (excluding batteries)

Accessories: Line test lead .......... 1

Earth test lead ........ 1 Line test lead

Batteries ................. 6

Test leads case ...... 1 Earth test lead

Belt ......................... 1

Instruction manual .. 1
Optional accessory: Test lead with remote switch

4. MEASURING RANGES AND TECHNICAL DATA

● Insulation resistance measurement

Model

MIS-2D

MIS-3D

MIS-4D

Rated voltage &

effective measuring

range

125V-20MΩ
250V-50MΩ
500V-100MΩ

250V-50MΩ
500V-100MΩ

1000V-2000MΩ

125V-20MΩ

250V-500MΩ

1000V-2000MΩ

Min. measurable
resistance at
rated voltage

0.125MΩ

0.25MΩ

0.5MΩ

0.25MΩ

0.5MΩ
1MΩ

0.125MΩ

0.25MΩ
1MΩ

Rated current

1mA +20% -0%

Max. no-load voltage

Rated voltage +30% -0%

Short circuit current

<2mA