KYORITSU 3007A User Manual

INSTRUCTION MANUAL

DIGITAL INSULATION-CONTINUITY TESTER

MODEL 3005A /3007A

KYORITSU ELECTRICAL INSTRUMENTS

WORKS, LTD.

CONTENTS

1. SAFETY PRECAUTIONS ······································································· 1

2. FEATURES ···························································································· 4

3. SPECIFICATIONS ················································································· 5

4. INSTRUMENT LAYOUT ········································································· 9
4-1 Instrument layout ············································································· 9
4-2 LCD ································································································ 10
4-3 Connector ······················································································· 11

5. PREPARATION FOR MEASUREMENT ··············································· 12
5-1 Removing the Cover ······································································· 12
5-2 Battery Voltage Check ····································································· 12
5-3 Test Probe Connection ··································································· 12

6. OPERATION ·························································································· 13
6-1 Disconnection and Check of Power Source of

the Circuit under Test ····································································· 13
6-2 Insulation Resistance Measurement ··············································· 14
6-3 Continuity Measurement (Resistance Tests) ·································· 16
6-4 Continuous Measurement ······························································· 17

7. FUNCTIONS ·························································································· 18
7-1 TRAC-LOK Mode (Model 3007A only) ············································ 18
7-2 AUTO NULL ···················································································· 18
7-3 Back Light (Model 3007A only)························································ 18
7-4 Auto Power Off ················································································ 18

8. BATTERY & FUSE REPLACEMENT ···················································· 19
8-1 Battery Replacement ······································································ 19
8-2 Fuse Replacement ·········································································· 19

9. CASE AND STRAP BELT ASSEMBLY·················································· 20

10. CLEANING OF THE INSTRUMENT ····················································· 21

11. SERVICING···························································································· 21

1. SAFTY PRECAUTIONS

○ The instrument is designed to produce in accordance with the following

standards and supplied in the best conditions after successfully clearing
the inspection.

・IEC 61010-1 Overvoltage CAT III 300V Pollution Degree 2
・IEC 61010-2-31 (Safety requirements for hand-held probe assemblies)

This instruction manual describes warnings and safety rules which must be
observed by the user to ensure safety operation of the instrument and to
retain it in safe condition. Therefore, read through these instructions before
using the instrument.

WARNING

Read through and understand instructions contained in this manual

●

before using the instrument.
Save and keep the manual handy to enable quick reference whenever

●

necessary.
The instrument must only be used by a competent trained person and

●

operated in strict accordance with the instructions. KYORITSU will not
accept any liability for any damage or injury caused by misuse or non­compliance with the instructions or safety procedures.
It is essential to understand the safety rules contained in the manual.

●

They must be observed on using the instrument.
Be sure to observe the above rules strictly. Not following the
instructions may cause injury or instrument damage.

○ The symbol on the instrument means that the user must refer to the

relevant section of this manual for safe operation of the instrument. There
are three kinds of the symbol . Read the following instructions of each

symbol carefully.

― 1 ―

DANGER is reserved for conditions and actions that are likely to cause

serious or fatal injury.

WARNING is reserved for conditions and actions that can cause

serious or fatal injury.

CAUTION is reserved for conditions and actions that can cause minor

injury or instrument damage.

DANGER

Do not use this instrument on energized (LIVE) circuits.

●

Do not take measurement in the presence of flammable gasses.

●

Otherwise, the use of the instrument may cause sparkling, which leads
to an explosion.

Always keep your fingers behind the barrier on test probe during

●

measurement.
Never use the instrument if its surface or your hand is wet.

●

Never open the battery compartment cover while taking measurement.

●

WARNING

Do not attempt to take any measurements, if any abnormal conditions

●

occur, such as broken test probe and cracked enclosure of the
instrument.

Never change function switches with test probe connected to the

●

equipment under test.
Do not install substitute parts, perform any unauthorized modification, or

●

disassemble the instrument. Return the instrument to Kyoritsu or your
distributor for service and repair so as to ensure the safety features are
maintained.
Do not replace batteries when the surface of the instrument is wet.

●

Make sure to disconnect the test probe from the instrument before

●

opening the battery compartment cover for battery replacement.

― 2 ―

CAUTION

Always make sure to set the function switch or range selector switch to

●

the appropriate position before taking measurements.
Do not expose the instrument to the direct sun, dew fall or extreme

●

temperature and/or humidity.

When the instrument will not be in use for a long period of time, place it

●

in storage after removing batteries.

Use a damp cloth soaked in water or neutral detergent for cleaning the

●

instrument. Do not use abrasives or solvents.

― 3 ―

2. FEATURES

MODEL-3005A/3007A are microprocessor controlled insulation-continuity
testers.

● Designed to safety standards:

IEC 61010-1 Overvoltage CAT III 300V Pollution Degree 2
IEC 61010-2-31 (Safety requirements for hand-held probe assemblies)

● Display with back light function to facilitate work at night or dimly lit

locations (Model 3007A only)

● Bar graph to indicate measured results

● Strap belt to make both hands' operation easier

● Live circuit warning indication and buzzer

● Auto discharge function

When insulation resistance is measured, electric charges stored in
capacitive circuits are automatically discharged after testing. Discharge
can be checked with live circuit warning.

● Auto power off function

To prevent the instrument from being left powered on and conserve
battery power, the instrument automatically turns off approx. 10 minutes
after the last switch operation.

● LOK mode (Model 3007A only)

The test current is removed once a stable reading is reached to prevent
unnecessary battery consumption.

― 4 ―

3. SPECIFICATIONS

● Measuring Range and Accuracy (at 23±5°C, relative humidity 45 -75%)

○ Insulation Resistance Ranges:

Nominal Output Voltage 250V 500V 1000V

Measuring
Ranges

Open-Circuit 250V DC 500V DC 1000V DC
Voltage +20%,-0% +20%,-0% +20%,-0%

Nominal Current

Short-Circuit
Current

20MΩ

Accuracy

○ Continuity Ranges:
Ranges 20Ω 200Ω 2000Ω
Measuring Ranges 0 ~ 19.99Ω 0 ~ 199.9Ω 0 ~ 1999Ω
Open-Circuit
Voltage
Measuring Current

at 0.2Ω ~ 2Ω

Accuracy

○ AC Voltage Indication

200MΩ

0~1GΩ

2000

MΩ

1G~2GΩ

0 ~ 600V ±5%rdg ±3dgt

0 ~19.99MΩ 0 ~19.99MΩ 0 ~19.99MΩ

0 ~ 199.9MΩ 0 ~ 199.9MΩ 0 ~ 199.9MΩ

0 ~ 1999MΩ 0 ~ 1999MΩ 0 ~ 1999MΩ

1mA DC min. 1mA DC min. 1mA DC min.

at 0.25MΩ at 0.5MΩ at 1MΩ

1.5mA approx

±1.5%rdg ±5dgt

±10%rdg ±3dgt

7 ~ 12V approx

200mA min

±1.5%rdg ±5dgt

±3%rdg ±3dgt

±1.5%rdg ±3dgt

― 5 ―

● Typical Number of Measurements.

(central tendency for supply voltage up to 8V)
Insulation Resistance Ranges:

Approx. 1000 times min. at load 0.5MΩ

Continuity Ranges:

Approx. 700 times min. at load 1Ω

● Operating Errors (IEC 61557-2,-4)

Functions Range

20MΩ 0.50 ~ 19.99MΩ

1000V 200MΩ 1.0 ~ 199.9MΩ

2000MΩ 10 ~ 1000MΩ
20MΩ 0.50 ~ 19.99MΩ

500V 200MΩ 1.0 ~ 199.9MΩ

2000MΩ 10 ~ 100MΩ
20MΩ 0.25 ~ 19.99MΩ ±30%

250V 200MΩ 1.0 ~ 199.9MΩ

2000MΩ 10 ~ 100MΩ
20Ω 0.20 ~ 19.99Ω

Ω 200Ω 1.0 ~ 199.9Ω

2000Ω 10 ~ 1999Ω
The influencing variations used for calculating the operating error are
denoted as follows;

Temperature: 0℃ and 35℃
Supply voltage : 8V to 13.8V

● Applicable Standards

IEC 61010-1 Over voltage CAT III 300V Pollution Degree 2
IEC 61010-2-31 Safety requirements for hand-held probe

IEC 61557-1/2/4 Measuring equipment for low voltage

IEC 61326-1 EMC

Measuring range to keep Maximum percentage

operating error operating error

assemblies

distribution systems

― 6 ―