KYORITSU 3131A Manuale utente

MODEL

3131

ANALOGUE INSULATION / CONTINUITY TESTER

INSTRUCTION MANUAL

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Contents

1. Safety Warnings .................................................................................... 1

2. Features ............................................................................................... 5

3. Specifications ...................................................................................... 6

4. Instrument Layout ................................................................................. 8

5. Preparation for Testing......................................................................... 10

5-1 Removing the Cover ...................................................................... 10

5-2 Mechanical Zero Adjustment .......................................................... 11

5-3 Battery Voltage Check ................................................................... 11

5-4 Test Probe Connection .................................................................. 11

5-5 Test Probe Check ......................................................................... 11

6. Operation ........................................................................................... 12

6-1

Disconnection and Check of Power Source of Circuit Under Test

................ 12

6-2 Insulation Resistance Measurement ................................................ 13

6-3 Continuity Testing (Resistance Tests) ............................................. 14

6-4 Continuous Measurement .............................................................. 15

7. Back Light Function ............................................................................ 16

8. Battery & Fuse Replacement ............................................................... 17

8-1 Battery Replacement ...................................................................... 17

8-2 Fuse Replacement ........................................................................ 17

9. Notes on Accessories .......................................................................... 18

9-1 How to Fit Strap Belt & Test Probe Pouch ........................................ 18

10. Cleaning of the Instrument .................................................................... 19

11. Service ............................................................................................... 19

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This instrument has been designed, manufactured and tested according to IEC

61010: Safety requirements for Electronic measuring apparatus, and delivered in

the best condition after passed the inspection. This instruction manual contains

warnings and safety rules which must be observed by the user to ensure safe

operation of the instrument and retain it in safe condition. Therefore, read

through these operating instructions before using the instrument.

#WARNING

●Read through and understand the instructions contained in this manual

before using the instrument.

●Keep the manual at hand to enable quick reference whenever necessary.

●The instrument is to be used only in its intended applications.

●Understand and follow all the safety instructions contained in the manual.

It is essential that the above instructions are adhered to. Failure to follow

the above instructions may cause injury, instrument damage and/or damage

to equipment under test. Kyoritsu is by no means liable for any damage

resulting from the instrument in contradiction to these cautionary notes.

○The symbol #indicated on the instrument, means that the user must refer

to the related parts in the manual for safe operation of the instrument. It is

essential to read the instructions wherever the symbol appears in the manual.

#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 injury

or instrument damage.

1. SAFETY WARNINGS

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Please refer to following explanation of the symbols used on the instrument and

in this manual.

#User must refer to the explanations in the instruction manual.

Caution, risk of electric shock.

Instrument with double or reinforced.

Protection against wrong connection is up to 440V.

EARTH GROUND

This instrument satisfies the marking requirement defined in the WEEE

Directive 2002/96/EC. This symbol indicates separate collection for

electrical and electronic equipment.

#DANGER

●

Confirm a proper operation of the instrument with a well-known power supply.

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

●

Do not attempt to make measurement in the presence of flammable gasses.

Otherwise, the use of the instrument may cause sparking, which can lead

to an explosion.

●Do not make measurement when thunder is rumbling. If the instrument is

in use, stop the measurement immediately and remove the instrument

from the measured object.

●Never attempt to use the instrument if its surface or your hand is wet.

●Never open the battery compartment cover and the instrument case when

making a measurement.

●Do not exceed the maximum allowable input of measuring ranges.

●

The instrument is to be used, only in its intended applications or conditions.

Otherwise, safety functions equipped with the instrument doesn't work,

and instrument damage or serious personal injury may be caused.

●Always Keep your fingers and hands behind the protective fingerguard on

test probe to avoid the possible shock hazard.

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#WARNING

●Never attempt to make any measurement, if the instrument has any

structural abnormality such as cracked case or exposed metal parts.

●Do not turn the range selector switch while the test probe are connected

to the circuit under test.

●Do not install substitute parts or perform any unauthorized modification of

the instrument. Return the instrument to Kyoritsu or your distributor for

service and repair to ensure the safety features are maintained.

●Do not try to replace the batteries and fuse if the surface of the

instrument is wet.

●Firmly insert the plug into the terminal when using test probe.

●Make sure to disconnect the test probe from the instrument before

opening the battery compartment cover for battery and fuse replacement.

●Stop using the test lead if the outer jacket is damaged and the inner metal

or color jacket is exposed.

#CAUTION

●Always make sure to set the range selector switch to the appropriate

position before making measurements.

●Do not expose the instrument to the direct sun, dew fall or extreme

temperature and 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.

●Keep your fingers and hands behind the protective fingerguard during

measurement.

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Measurement categories (Over-voltage categories)

To ensure safe operation of measuring instruments, IEC 61010 establishes

safety standards for various electrical environments, categorized as O to CAT IV,

and called measurement categories.

Higher-numbered categories correspond to electrical environments with greater

momentary energy, so a measuring instrument designed for CAT III environments

can endure greater momentary energy than one designed for CAT II.

O : Circuits which are not directly connected to the mains power supply.

CAT II : Primary electrical circuits of equipment connected to an AC

electrical outlet by a power cord.

CAT III : Primary electrical circuits of the equipment connected directly to

the distribution panel, and feeders from the distribution panel to

outlets.

CAT IV : The circuit from the service drop to the service entrance, and to the

power meter and primary overcurrent protection device (distribution

panel).

O: Device which is

not directly

connected to the

mains power supply

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2. Features

MODEL-3131A is an analogue insulation tester with five ranges for insulation

resistance measurement and continuity testing (resistance tests) of low voltage

installations.

●Designed to safety standards:

IEC61010-1

IEC61010-031

IEC 61557-1,2,4,10

●Dust and drip proof constrution to IP54

●Three insulation test ranges : 250V/100MΩ, 500V/200MΩ, 1000V/400MΩ

●Two continuity test ranges : 2Ω, 20Ω

●Back light function to facilitate work at night or dimly lit locations

●Easy for battery check

●Power-on indication LED lighting during battery check and measurement

●Live circuit warning indication with LED lighting and the buzzer sound

●Fuse protected.

●Color coded scales and range switch position for easy reading

●Uses only 6× 1.5V battery type R6, AA or equivalent

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3. Specifications

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

Insulation Resistance Ranges:(IEC 61557-2)

Nominal Output Voltage

250V 500V 1000V

Measuring Ranges

Open-Circuit

Voltage

Short-Circuit

Current

Nominal Current

Accuracy

0 - 100MΩ

250V DC +20% max.

1.3mA approx

1mA DC min.

at 0.25MΩ

±5% of indicated value

at 0.1MΩ- 10MΩ

±0.7% of scale length at ranges other than above ranges

0 - 200MΩ

500V DC +20% max.

1mA DC min.

at 0.5MΩ

±5% of indicated value

at 0.2MΩ- 20MΩ

0 - 400MΩ

1000V DC + 20% max.

1mA DC min.

at 1MΩ

±5% of indicated value

at 0.4MΩ- 40MΩ

Continuity Test (Resistance Test) Ranges:(IEC 61557-4)

Ranges

Measuring Ranges

x 1Ω

0 - 2Ω

x 10Ω

0 - 20Ω

Open-Circuit Voltage

Measuring Current

Accuracy

Zero Adjustment Range

4 - 9V DC

200mA DC min.

±3% of scale length

0.2Ωmin.

Ranges

250V/100MΩ

500V/200MΩ

1000V/400MΩ

Measuring range to keep operating instrumetal uncertainty

Maximum percentage operating instrumetal uncertainty

0.1MΩ- 10MΩ

±30%0.2MΩ- 20MΩ

0.4MΩ- 40MΩ

Ranges

x1Ω

x10Ω

Measuring range to keep operating instrumetal uncertainty

Maximum percentage operating instrumetal uncertainty

0.2Ω- 2Ω±30%

2Ω- 20Ω

Operating instrumetal uncertainty

Insulation Resistance Ranges(IEC 61557-2)

Continuity Test (Resistance Test) Ranges(IEC 61557-4)

The influencing variations used for calculating the operating instrumental uncertainty are

denoted as follows:

Temperature : 0℃and 35℃

Supply voltage : 6.5V to 10.4V

Position : Reference position ±90°

※Prior to measurement, apply Zero Adjustment at each position

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Typical Number of Measurements (central tendency for supply voltage up to

6.5V)

Insulation Resistance Ranges:

1000V/400MΩRange Approx. 500 times min.

500V/200MΩRange Approx. 1300 times min.

250V/100MΩRange Approx. 1800 times min.

Continuity Test (Resistance Test) Ranges:

x1ΩRange/ x 10ΩRange Approx. 1000 times min.

Applicable Standards

IEC 61010-1. -2-030 Measurement CAT Ⅲ300V Pollution Degree 2

IEC 61010-031 Safety requirements for hand-held probe assemblies

IEC 61557-1,2,4

Measuring equipment for low voltage distribution systems

IEC 61326-2-2 EMC

IEC 60529 (IP54) Dust & drip proof

EN 50581 (RoHS)

Used location altitude 2000m or less

Operating Temperature & Humidity:

0-40℃, relative humidity up to 85%

Storage Temperature & Humidity:

-20-60℃, relative humidity up to 85%

Insulation Resistance

More than 50MΩat 1000V DC between

electrical circuit and housing case

Withstand Voltage 3470V AC for five seconds between electrical

circuit and housing case

Overload Protection

Insulation resistance ranges: 1000V Range

1200V

(DC)

for 10 seconds

500V Range

600V (DC) for 10 seconds

250V Range

300V (DC) for 10 seconds

Continuity ranges:

x 1Ω/ x 10ΩRange

440V (AC p-p) for 1minute

Dimensions: 185(L) x 167(W) x 89(D) mm approx.

Weight: 860g approx. (including batteries)

Power Source:

6 x 1.5V battery type SUM-3, R6 , AA or equivalent

Accessories Test Probe MODEL7122B x 1 set

Strap belt x 1

Test probe pouch x 1

R6P AA batteries x 6

Spare fuse F 500mA/600V x 1

Instruction manual x 1

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4. Instrument Layout

①METER MOVEMENT ZERO ADJUST ②TEST BUTTON

③SCALE PLATE ④LIVE CIRCUIT WARNING LED

⑤POWER-ON INDICATION LED ⑥CONTINUITY ZERO ADJUST

⑦LIGHT SWITCH ⑧RANGE SELECTOR SWITCH

⑨TEST PROBE (RED) LINE PROBE ⑩TEST PROBE (BLACK) EARTH PROBE

⑪ALLIGATOR CLIP (BLACK) ⑫PROTECTIVE FIGERGUARD

Fig.1 Part names

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