KYORITSU 3131A User manual

MODEL

３１３１

ANALOGUEINSULATIONTESTER

INSTRUCTIONMANUAL

KYORITSUELECTRICALINSTRUMENTS

WORKS，LTD.,TOKYOJAPAN

Contents

1. SafetyPrecautions ................................................................................1

2.Features ...............................................................................................3

3.Specifications ......................................................................................4

4.InstrumentLayout .................................................................................6

5.PreparationforTesting .........................................................................7

5-1RemovingtheCover .....................................................................7

5-2 MechanicalZeroAdjustment ........................................................8

5-3 BatteryVoltageCheck ..................................................................8

5-4 TestProbeConnection .................................................................8

5-5TestProbeCheck .........................................................................8

6.Operation ............................................................................................9

6-1

DisconnectionandCheck ofPowerSourceofCircuitUnderTest

..........9

6-2 InsulationResistanceMeasurement .........................................10

6-3 ContinuityTesting(ResistanceTests) .......................................11

6-4 ContinuousMeasurement ..........................................................12

7.BackLightFunction ..........................................................................13

8.Battery&FuseReplacement ............................................................14

8-1BatteryReplacement ....................................................................14

8-2FuseReplacement ........................................................................14

9.NotesonAccessories .........................................................................15

9-1 HowtoFitStrapBelt&TestProbePouch ...................................15

10. CleaningoftheInstrument ...................................................................16

11. Service .................................................................................................16

―

1.SafetyPrecautions

○Theinstrumentisdesignedandtestedinaccordancewiththefollowing

standardsandsuppliedinthebestcondition.

・IEC61010-1 OvervoltageCAT.Ⅲ300VPollutionDegree2

・IEC61010-2-31 Safetyrequirementsforhand-heldprobeassemblies

・IEC61557-1/2/4

Measuringequipmentforlowvoltagedistributionsystems

・IEC60529（IP54） Dust＆ dripproof

・IEC61326 EMC

Thisinstructionmanualcontains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non-

compliancewiththeinstructionsorsafetyprocedures.

●Itisessentialtounderstandthesafetyrulescontained inthemanual.

Theymustbeobservedwhen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 instructionsfollowingeach

symbolcarefully.

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make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 making

measurement.

WARNING

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

structuralabnormalitysuchascrackedcaseorexposedmetalparts.

●Neverchangerangeswithtestprobeconnectedtotheequipment

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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.

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.

―

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:

IEC61557-1(Generalrequirementsformeasuringequipmentforlowvoltage

distributionsystems)

IEC61557-2(Equipmentforinsulationresistancemeasurementforlow

voltagedistributionsystems)

IEC61557-4(Equipmentforresistancetestsforlowvoltagedistribution

systems)

●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R-6,AAorequivalent

―

3.Specifications

●Measuring Range and Accuracy (at23±5°C,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Ω

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

0.2Ω min.

Ranges

250V/100MΩ

500V/200MΩ

1000V/400MΩ

Measuringrangetokeepoperatingerror

Maximumpercentageoperatingerror

0.1MΩ -10MΩ

±30%0.2MΩ -20MΩ

0.4MΩ -40MΩ

Ranges

xΩ

x10Ω

Measuringrangetokeepoperatingerror

Maximumpercentageoperatingerror

0.2Ω -2Ω ±30%

2Ω -20Ω

Operating Error

InsulationResistanceRanges(IEC61557-2)

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

Theinfluencingvariationsusedforcalculatingtheoperatingerroraredenotedasfollows:

Temperature :0°Cand35°C

Supplyvoltage :6.5Vto10.4V

Position :Referenceposition±90°

※Priortomeasurement,applyZeroAdjustmentateachposition

―

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

6.5V)

InsulationResistanceRanges:

1000V/400MΩ Range Approx.500timesmin.

500V/200MΩRange Approx.1300timesmin.

250V/100MΩ Range Approx.1800timesmin.

ContinuityTest(ResistanceTest)Ranges:

xΩ Range/x10Ω Range Approx.1000timesmin.

Applicable Standards

IEC61010-1 OvervoltageCAT.Ⅲ300VPollutionDegree2

IEC61010-2-31 Safetyrequirementsforhand-heldprobeassemblies

IEC61557-1/2/4

Measuringequipmentforlowvoltagedistributionsystems

IEC61326 EMC

IEC60529(IP54) Dust&dripproof

Operating Temperature & Humidity:

0-40°C,relativehumidityupto85%

Storage Temperature & Humidity:

-20-60°C,relativehumidityupto85%

Insulation Resistance Morethan50MΩat1000VDCbetween

electricalcircuitandhousingcase

Withstand Voltage 3700VACforoneminutebetweenelectrical

circuitandhousingcase

Overload Protection

Insulationresistanceranges: 1000VRange 1200V (DC+ACp-p) for10seconds

500VRange 600V(DC+ACp-p)for10seconds

250VRange 300V(DC+ACp-p)for10seconds

Continuityranges:

xΩ/x10ΩRange

280V(DC+ACp-p)for10seconds

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,R-6,AAorequivalent

Accessories TestProbeMODEL7122 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

―

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

⑪TESTPROBECAP(RED) ⑫TESTPROBECAP(BLACK)

⑬ALLIGATORCLIP(BLACK)

Fig.1 Partnames

①

② ⑧ ⑦

⑥

⑤

④

③

⑨

⑪

⑬

⑫

⑩

―

5.PreparationforTesting

5-1RemovingtheCover

Model3131Ahas adedicatedcovertoprotect againstanimpactfrom

theoutside andprevent theoperation part,and theconnectorsocket

frombecomingdirty.

Removethecoverandputitonthebacksideofthemainbodytomake

measurements.

5-1-1Methodofremovingthecover

5-1-2Methodofhousingthecover

Fig.2

Fig.3

―

5-2MechanicalZeroAdjustment

Checkthatthepointerlinesupwiththemiddleofthemarkonthescale

correctly.Ifnot,adjustitbyrotatingthemetermovementzeroadjustwith

ascrewdriver,etc.

5-3BatteryVoltageCheck

①SettherangeselectorswitchtoBATT.CHECKposition.

②Pressthetestbutton.

③Thenthepointerdeflects.JudgethebatterystatuswithBATT.GOOD

markonthescaleplate.

IfthepointerdoesnotmovetoBATT.GOODmark,the batteriesare

exhausted.Replacethemwithnewbatteriesaccordingtosection8for

battery&fusereplacement.

5-4TestProbeConnection

Insertthetestprobefullyintotheterminaloftheinstrument.

Connecttheearthclipofthetestprobe(black)toEARTHterminaland

thelineprobe(red)toLINEterminaloftheconnectorterminal.

5-5TestProbeCheck

SettherangeselectorswitchtoxΩ positionandpressandturntheTest

buttontolockitdown.Whenthetestprobeareconnectedtogether,the

pointershouldmovefromthe∞ positiontowardsthe０positiononthe

bluecontinuityscale.Ifnot,theprobeorfusemaybefaulty.Releasethe

Testbuttonaftercompletion.

CAUTION

Donotkeepthetestbuttonpressedorlockedbyturningitclockwiseduring

batterycheck.

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