KYORITSU KEW SNAP 2434 User manual

INSTRUCTIONMANUAL
KEWSNAP 2434
KEWSNAP Series
LEAKAGECURRENTTESTER
KYORITSUELECTRICALINSTRUMENTSWORKS,LTD.,
TOKYO,JAPAN
1.SAFETYWARNINGS
ThisinstrumenthasbeendesignedandtestedaccordingtoIEC
Publication61010: Safety Requirements for Electronic Measuring
Apparatus. This instruction manual containswarnings and safety
ruleswhichmustbeobservedbytheusertoensuresafeoperation
ofthe instrumentandtoretainitinsafecondition.Therefore,read
throughthese operatinginstructionsbeforestartingusing the
instrument.
WARNING
●Readthroughandunderstandinstructions contained in this
manualbeforestartingusingtheinstrument.
●Save and keep the manual at hand to enable quick reference
whenevernecessary.
●Besuretousethe instrument only in its intended applications
andtofollowmeasurementproceduresdescribedinthe
manual.
●Besuretounderstandandfollowallsafetyinstructions
containedinthemanual.
Notfollowingtheaboveinstructionsmaycauseinjury,instrument
damageand/ordamagetoequipmentundertest.
Thesymbol indicated on the instrument means that theuser
mustrefertorelatedpartsofthemanualforsafeoperationofthe
instrument. Be sure to carefully read theinstructionsfollowing
each symbolinthis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
minorinjuryorInstrumentdamage.
DANGER
●Nevermake measurementona circuithavingpotential of
300VACorgreater.
●Donotattemptto makemeasurementinthepresenceof
flammable gasses.  Otherwise, the use of the instrument may
causesparking,whichleadstoanexplosion.
●Thetransformerjawsaremadeofmetalandtheir tips are not
completely insulated. Be especially careful about the possible
shortingwheretheequipmentundertesthasexposedmetalparts.
●Neverattempttousetheinstrumentifitssurfaceoryourhandiswet.
●Do not exceed the maximum allowable input of any
measurementrange.
●Neveropenthebatterycompartmentcoverwhenmaking
measurement.
●Nevertrytomakemeasurementifanyabnormalconditions,
suchasbrokenTransformerjawsorcaseisnoted.
●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.
Followingsymbolsareusedontheinstrumentandintheinstructionmanual.
Attentionshouldbepaidtoeachsymboltoensureyoursafety.
Refertotheinstructionsinthemanual.
Indicatesaninstrumentwithdoubleorreinforcedinsulation.
Indicatesthatthisinstrumentcanclamponbareconductorswhen
measuringavoltagecorrespondingtotheapplicableMeasurement
category,whichismarkednexttothissymbol.
IndicatesAC(AlternatingCurrent).
IndicatesEarth.
WARNING
●Neverattemptto makeanymeasurement,ifany abnormal
conditionsarenoted,suchasbrokencase,crackedtestleads
andexposedmetalparts.
●Do not install substitute parts or make any modification to the
instrument.ReturntheinstrumenttoKyoritsuoryourdistributor
forrepairorre-calibration.
CAUTION
●Makesurethattherangeselectorswitchissettoanappropriate
positionbeforemakingmeasurement.
●Donotexposetheinstrumenttothedirectsun,extreme
temperaturesordewfall.
●Besure to set the range selector switchto the "OFF" position
afteruse.Whentheinstrumentwillnotbeinuseforalong
periodoftime,placeitinstorageafterremovingthebatteries.
●Useadampclothanddetergentforcleaningtheinstrument.Do
notuseabrasivesorsolvents.
●Alwaysswitchofftheinstrumentbeforeopeningthe battery
compartmentcoverforbatteryreplacement.
2.FEATURES
●DigitalclamptesterforACleakagecurrentmeasurement.
●Leastaffectedbyexternalmagneticfield,providingwide
measuringrangefromverysmalltolargecurrents.
●DesignedtosafetystandardIEC61010-2-032:measurementCAT.
Ⅲ,300Vandpollutiondegree2.
●Dataholdfunctiontoallowforeasyreadingsindimlylitorhard-to-
reachlocations.
●Providesfilteringfunctiontoremovehighfrequencygeneratedby
suchequipmentasinverters.
●Sleepfunctionpreventsunnecessarypowerconsumption.
●Dynamicrangeof4000countsfullscale.
●Largeeasy-to-readLCDdisplaywithletterheightof13mm.
●Transformerjawsfittedwithguardtofurtherimprovesafety.
Measurementcategories(Over-voltagecategories)
Toensuresafeoperationofmeasuringinstruments,IEC61010establishes
safetystandardsforvariouselectricalenvironments,categorizedasCATI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.
CAT.I:Secondary electrical circuits connected to an AC electrical outlet
throughatransformerorsimilardevice.
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 over-current protectiondevice
(distributionpanel).
Incoming wire
CAT.IV
Interior wiring
Transformer
CAT.I
CAT.II
CAT.III
S
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3.SPECIFICATIONS
Measuringrangesandaccuracy
Measuringmethod: DualIntegration
Display: Liquid crystal display with maximum reading
of3999
Lowbatterywarning: "BATT"markappearsonthedisplay
OverrangeIndication: "OL"appearsonthedisplaywhenupperlimit
ofmeasuringrangeisexceeded
ResponseTime: Approx.2seconds
SampleRate: Approx.2.5timespersecond
Locationforuse Indooruse,Altitudeupto2000m
Accuracy-insured 23℃±5℃,relativehumidity85%orless
Temperatureand (withoutcondensation)
HumidityRanges:
OperatingTemperature 0-40℃,relativehumidity85%orless
andHumidityRanges: (withoutcondensation)
StorageTemperature -20-60℃,relativehumidity85%orless
andHumidityRanges: (withoutcondensation)
PowerSource: Two1.5VR03(UM-4)batteries
CurrentConsumption: Approx.4mA
MeasurementTime: Approx.150hours
SleepFunction: Automaticallypowereddowninabout10
minutesafterthelastswitchoperation
SafetyStandard: IEC61010-1,IEC61010-2-032
measurementCAT.Ⅲ300V, pollutiondegree
2IEC61326(EMC)
OverloadProtection: 120Armsmax.for10seconds
WithstandVoltage: 3700Vrms(50/60Hz)for1minutebetween
metalpartoftransformer jaws and housing
case(excepttransformerjawcase)
InsulationResistance: 10MΩ orgreaterat1000V between metal
partoftransformerjawsand housing case
(excepttransformerjawcase)
ConductorSize: Approx.28mmindiametermax.
Dimensions: 169(L)×75(W)×40(D)mm
Weight: Approx.220gincludingbatteries
Accessories: TwoR03(UM-4)batteries
CarryingcaseModel9052
Instructionmanual
OptionalAccessories: Multi-TranModel8004and8008
Whenmeasuringcurrentwhichpulseelementissuperposed,differencesof
theindicatedvalue may becausedbetweenranges, if thepeakvalue
exceedsthemeasurementrangetoalargeextent.Inthiscase,thereading
atthebiggerrangeshouldbetakenasarightvalue.
SensitivetransformerjawsareusedforLeakageclampmeter.Becauseof
thecharacteristicsoftransformerjaws,whichcanbeopenedandclosed,it
isimpossible toeliminatetheinterferenceofexternalmagnetic field
completely.Iftherearesomething,whichgeneratinglargemagneticfield,at
anearbysite,currentvaluecanbedisplayed(0 cannotbedisplayed.)
beforeclamping onthe conductor.For suchacase,pleaseusethe
instrumentatalocationfarfromthething,whichgeneratingmagneticfield.
Followingarethetypicalthingsgeneratingmagneticfield.
Conductorfedlargecurrent,Motor,Equipmentwhichhasmagnet,
Integratingwattmeter
Range
400mA
4A
100A
MeasuringRange
0〜399.9mA
0〜3.999A
0〜100.0A
Accuracy(Frequencyrange)
±2.0%rdg±4dgt（50/60Hz）
±3.0%rdg±5dgt（40〜400Hz）
4.INSTRUMENTLAYOUT
5.PREPARATIONSFORMEASUREMENT
5-1CheckingBatteryVoltage
SettheRange Selector Switch to any position otherthanthe OFF
position.Ifthemarksonthedisplayisclearlyvisiblewithout"BATT"
markshowing,batteryvoltageisOK.Ifthedisplayblanksor"BATT"
isindicated,replace the batteries according to section 8: Battery
Replacement.
NOTE
Whenthe instrumentisleftpoweredon, theSleepfunction
automatically shut the power off; The display blanks even if the
RangeSelectorSwitchis set to a position other than the OFF
positioninthisstate.Topowerontheinstrument,turntheRange
SelectorSwitchorpressanybutton.Ifthedisplaystillblanks,the
batteriesarecompletelyexhausted.Replacethebatteries.
5-2CheckingSwitchSetting
MakesurethattheRangeSelectorSwitchissettotheappropriate
range.
Alsomakesurethatdataholdfunctionisnotenabled.If
inappropriaterangeisselected,desired measurement cannot be
made.
TransformJaws
Trigger
RangeSelectorSwitch
HandStrap
Display
FrequencySelectorButton
DataHoldButton
●ＬＣＤ
LowBatteryWarning
FrequencyResponse:
Wide
FrequencyResponse:
50/60Hz
DataHoldIndication
Unit
Barrier

92 ― 1509A04 ― 12
DISTRIBUTOR
Kyoritsu reserves the rights to change specifications or designs
describedinthismanualwithoutnoticeandwithoutobligations.
3-phase3-wiresystem
(In4-wiresystemwithneutral,
clampontoall4wires)
Single-phase2-wiresystem
(in3-wiresystemwithneutral,
clampontoall3wires)
Load
Load
6.OPERATINGINSTRUCTIONS
DANGER
●Inordertoavoidpossibleshockhazard,nevermakemeasurement
oncircuitshavingapotentialof300VACorgreater.
●Thetransformer jaws aremadeofmetalandtheirtipsarenot
completelyinsulated.Be especially carefulaboutthepossible
shortingwheretheequipmentundertesthasexposedmetalparts.
●Nevermake measurement with the battery compartment cover
removed.
●Keep your fingers and hands behind the barrier during
measurement.
CAUTION
●Takesufficientcaretonottoapplyshock,vibrationor
excessiveforceto thejawtips. Otherwise,preciselyadjusted
TransformerJawtipswillbedamaged.
●Whenaforeign substanceisstuckin thejawtips orthey
cannotproperlyengage, thetransformerjawsdo notfully
close.Insuchacase,donotreleasethejawtriggerabruptlyor
attempttoclosethe transformer jawsbyapplyingexternal
force.Make surethatthejawsclose bythemselvesafter
removingtheforeignsubstanceormakingthemfreetomove.
●Themaximumsizeofaconductortobetested is 28mm in
diameter.Accuratemeasurementcannotbemadeona
conductorlarger thanthis,becausethetransformerjaws
cannotfullyclose.
●Whenmeasuringlargecurrent,thetransformerjawsmaybuzz.
Thishasnoeffectontheinstrument'sperformanceorsafety.
6-1LeakageCurrentMeasurement
(1)SettheRange Selector Switchtothedesiredposition. Current
tomeasureshouldbewithintheselectedmeasuringrange.
(2)Measuringoutofbalanceleakagecurrent(SeeFig.1):
Clamp onto all conductors except a grounded wire.  Measured
currentvalueisshownonthedisplay.
(3)Measuringearthleakagecurrent(SeeFig.2):
Clampontoagroundedwire.Measuredcurrentvalueisshownon
thedisplay.
Fig.1Measuringoutofbalanceleakagecurrent
6-2HowtoUseFrequencySelectorButton
Whenhighfrequenciesfromsuchequipmentasinvertersare
presentinthecircuitundertest, theinstrumentmeasuresAC
currentofnotonly50Hzor60Hzoffundamentalfrequencybutalso
ofthesehighfrequenciesandharmonics.
Toeliminatetheeffectof such high frequency noise andmeasure
ACcurrent of 50Hz or 60Hzfundamental frequency, a "high-cut"
filter circuit in incorporated into the instrument which works when
"50/60Hz"frequencyresponse isselectedwiththeFrequency
SelectorButton. Cut-off frequency of the"high-cut" filter is about
160Hzwithattenuationcharacteristicofapprox.-24dB/octave.
WhentheFrequencySelectorButtonispressed,"50/60Hz"markis
shownontheleftsideofthedisplay.WhentheFrequencySelector
Buttonispressed again, frequency response is switchedtoWIDE
with"WIDE"markshownonthedisplay.
Note:
Characteristicof-24dB/octiavemeansthatsignalmagnitude
declinestoaboutonesixteenthofthatattheinitialfrequencywhen
frequencydoubles.KEWSNAP2434havethefollowingtwo
settingsfortheFrequencySelectorButton.
WIDE(40Hz-):Permitsmeasurementofcurrentsof fundamental
frequenciesaswell as currents of high frequencies
generatedbysuchequipmentasinverters
50/60Hz(40-approx.160Hz):Filtersouthighfrequencycurrentsand
measurescurrentoffundamental
frequencyonly
Fig.3KEWSNAP2434FrequencyCharacteristic
OutputcharacteristicareshowninFig.3.
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100％
50％
20％
10％
5％
5ｋ1ｋ 2ｋ500100 200502010
ー30
ー20
ー10
0
Attenuation〔dB〕
10
Frequency〔Hz〕
Percentage
Typicalcharacteristic：
400mA/４ARange
Typicalcharacteristic：
WIDEfrequencyresponse
Typicalcharacteristic：
50/60Hzfrequencyresponse
high-cutfilter-24dB/oct
Typicalcharacteristic：
100ARange
Fig.2Measuringearthleakagecurrent
Load
Groundedwire
Recentlytherehasbeenincreaseduseofpowerthroughinverters,
switchingregulators,etc.Whenthehighfrequencynoisefromsuch
appliancesleaks or flows into the ground throughcapacitors not
filteringcompletely,theearthleakagebreakermaytripeventhough
thereisno"actual"leakage.Insuchacase,theinstrumentdonot
giveleakagecurrentreading if "50/60Hz" frequency response is
selected.
Takecurrent readingswiththe 50/60HzandWIDE frequency
responsesrespectivelytomakeeffective use of the Frequency
SelectorButton.
6-3LoadCurrentMeasurement
(1)SettheRangeSelectorSwitchtothedesiredposition. Currentto
measureshouldbewithintheselectedmeasuringrange.
(2)Measuringloadcurrent(SeeFig.4):
Pressthejawtriggertoopenthetransformerjawsandclose
themover oneconductoronly.Measured currentvalueis shown
onthedisplay.
7.OTHERFUNCTIONS
7-1SleepFunction
Thisisafunctiontopreventtheinstrumentfrombeingleftpowered
oninordertoconservebatterylife.
Theinstrumentautomaticallyenters the Sleep (powered-down)
Modeabout10minutesafterthelastswitchoperation.
ToexittheSleepMode,presstheDataHoldorFrequencySelector
ButtonorturntheRangeSelectorSwitchtoOFF,thentoanyother
position.
HowtoExittheSleepMode:
TurntheRange SelectorSwitchfromOFF to anotherposition
withtheData HoldButtonpressed.Then, P.OFF isshownon
thedisplay.ThisdisablestheSleepfunctionandenables
continuoususeoftheinstrument.
ToenabletheSleepfunction,turntheRangeSelectorSwitchback
toOFF,thentoanyotherposition.
Note:
TheinstrumentconsumessmallamountofcurrentintheSleep
Mode.Whentheinstrumentisnotinuse,makesuretosetthe
RangeSelectorSwitchtoOFF.
7-2DateHoldFunction
Thisisafunctiontofreezethereadingsonthedisplay.Whenthe
DataHoldButtonispressedonce,thecurrentreadingisheldeven
thoughcurrent under test varies. "H"mark is shown on the upper
rightcornerofthedisplay.
Toexitthedataholdmode,presstheDataHoldButtonagain.
Note:WhentheSleepfunctionworkswhiletheinstrumentisinthe
dataholdmode,dataholdiscancelled.
Fig.4Measuringloadcurrent
Load
8.BATTERYREPLACEMENT
CAUTION
●Donotmixnewandoldbatteries.
●Install batteries in the orientation as shown inside the battery
compartment,observingcorrectpolarity.
●Inordertoavoidpossibleshockhazard,alwayssettheRange
SelectorSwitchtotheOFFpositionbeforetryingtoreplacethe
batteries
Whenthe batteryvoltagewarningmark"BATT"isshownon the
top left corner of the LCD, replace the batteries.  Note that the
displayblanksand"BATT"markisnotshownifthebatteriesare
completelyexhausted.
(1)SettheRangeSelectorSwitchto"OFF."
(2)Loosenthebattery-compartment-cover-fixingscrewonthelower
backoftheinstrument.
(3)ReplacethebatterieswithtwonewR03(UM-4)1.5V
batteries.
(4)Putthebatterycompartment
cover back in place and
tightenthescrew.
Note:Use alkaline batteries to
performmeasuringforlong
9.OPTIONALACCESSORIES
Model8004and8008(Multi-Tran)
ThesemodelshelpKEWSNAP2434tomeasurecurrentgreaterthan
1000Aortomakemeasurementonalargebus-barorconductor.
(1)SettheRangeSelectorSwitchto"100A".
(2)Asshown,openthejawsandclosethemoverthepickupcoil
ofModel8004orModel8008.
(3)ClamponaconductorwithModel8004orModel8008.
(4)Takethereadingandmultiplyitby10.
Note: Model 8004 and Model 8008 cannot be used for leakage current
measurement.Fordetailedspecifications,refertothe
instructionmanualforModel8004orModel8008.
KEW2434
M-8004
M-8008
PickupCoil
Conductor
Transformer
jaws
10
：
１


M-8004
M-8008
Max.ConductorSize
60mmindiameter
100mmindiameter
Measuring
Range
0〜1000A
CurrentTransformation
Ratio
10:1
Screw Battery
Compartment
Cover
Batteries