Kyoritsu KEW 2433R Käyttöohje

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INSTRUCTIONMANUAL

KEW SNAP

　

2433R

KEW SNAPSeries

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handy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.

 

Failuretofollowthe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thiscautionarynote.

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.

Thefollowingsymbolsareusedandmarkedontheinstrumentand

intheinstructionmanual.Pleasecarefullycheckbeforestartingto

usetheinstrument.

#

Refertotheinstructionsinthemanual.

Thissymbolismarkedwheretheusermustrefertothe

instructionmanualsoasnottocausepersonalinjuryor

instrumentdamage.



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).

#



DANGER

●

Nevermakemeasurementonacircuithavingpotentialof

300

VAC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frytomakemeasurementifanyabnomalconditions.

suchasbrokenTransformerjawsorcaseisnoted.

●



Theinstrumentis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.

 

Keepyourfingersandhandsbehindtheprotectivefingerguard

duringmeasurement.

#



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.

●

Donottrytoreplacethebatteriesifthesurfaceofthe

instrumentiswet.

●

Alwaysswitchofftheinstrumentbeforeopeningthebattery

compartmentcoverforbatteryreplacement.

#



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.

○

MeasurementCategory:

 

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: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

Ｏ:

Device which is

not directly

connected to the

mains power supply

Socket

Interior wiring

2. FEATURES

●

DigitalclamptesterforACleakagemeasurement.

●

Accuratetrue-RMSreadingofACcurrentwithdistortedwaveform.

●

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

categoryCAT

Ⅲ

,

300

Vandpollutiondegree

2

.

●

Teardropshapedjawsforeaseofuseincrowdedcableareas

andothertightplaces.

●

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.

●

Peakholdfunctiontoallowformeasurementofcurrentvariation

asshortas

10

msec.

●

Auto-power-offfunctionpreventsunnecessarypowerconsumption

●

Dynamicrangeof

4200

countsfullscale.

●

Largeeasy-to-readLCDdisplaywithletterheightof

13

mm.

●

Operationconfirmingbeeps.

●

Insulationbarrieratthetipoftransformerjawsforimprovedsafety.

3. SPECIFICATIONS

Measuringrangesandaccuracy(Sinewave)

RangeResolutionMeasuringRangeAccuracy(Frequencyrange)

40

mA

0

.

01

mA

0

〜

40

.

00

mA

0〜100A

 ±

1

.

0

%rdg

±

5

dgt(

50

/

60

Hz)

 ±

2

.

5

%rdg

±

10

dgt(

20

Hz

〜

1

kHz)

100〜300A

 ±

1

.

0

%rdg

±

5

dgt(

50

/

60

Hz)

 ±

2

.

5

%rdg

±

10

dgt(

40

Hz

〜

1

kHz)

300〜400A

 ±

2

.

0

%rdg(

50

/

60

Hz)

 ±

5

.

0

%rdg(

40

Hz

〜

1

kHz)

400

mA

0

.

1

mA

0

〜

400

.

0

mA

400

A

0

.

1

A

0

〜

400

.

0

A

・

CF(Crestfactor)

≦

3

(

45

〜

65

Hz,lessthan

600

APeak)

※

100

〜

400

A

：

sinewave

＋

2

%rdg

・

Countsequaltoorlessthan

3

countsarecorrectedtozero

・

Accuracy-insuredFrequencyrangeof

50

/

60

Hzmodeis

50

/

60

Hz.

・

Themaxindicationatthe

40

mA/

400

mArangeis

6000

counts.

Minutecurrentmayexistwhilezeroisdisplayedat

400

A/

400

mA

range.Measurementshouldbemadealsoatalowerrange.

Conversion method：

Rmsvaluedetection

Operating System:

Sequentialcomparison

Display:

LCDwithmax.readingof

4200

(

400

Arange),

6000

(

40

/

400

mArange)

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

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)

Operable altitude:

2000

morlessabovesealevel(indooruse)

Power Source:

Two

1

.

5

VR

03

(AAA)batteries

Current Consumption:

Approx.

21

mA

Measurement Time:

Approx.

24

hours

Auto-power-off Function:

Turnspoweroffabout

10

minutesafterthe

lastswitchoperation

Safety Standard:

IEC

61010

-

1

IEC

61010

-

2

-

032

MeasurementCAT

Ⅲ



300

V,pollutiondegree

2

EMC directive:

EN

61326

-

01

,EN

61326

-

2

-

2

Environmetal standard:

EURoHSdirectivecompliant

Overload Protection:



480

AACmax.for

10

seconds

Withstand Voltage:



4240

VACrms(

50

/

60

Hz)for

5

sec.between

metalpartoftransformerjawsandhousing

case(excepttransformerjawcase)

Insulation Resistance:



50

M

Ω

orgreaterat

1000

Vbetweenmetal

partoftransformerjawsandhousingcase

(excepttransformerjawcase)

Conductor Size:

Approx.

40

mmindiametermax.

Dimensions:



185

(L)

×

81

(W)

×

32

(D)mm

Weight:

Approx.

270

gincludingbatteries

Accessories:

TwoR

03

(AAA)batteries

CarryingcaseModel

9052

Instructionmanual

Reference

*Effective Value (RMS)

Mostalternatingcurrentsand

voltagesareexpressedin

effectivevalues,whichare

alsoreferredtoasRMS(Root-

Mean-Square)values.

Theeffectivevalueisthe

squarerootoftheaverageof

squareofalternatingcurrentor

voltagevalues.Manyclampmetersusingaconventionalrectifyingcircuit

have"RMS"scalesforACmeasurement.Thescalesare,however,actually

calibratedintermsoftheeffectivevalueofasinewavethoughtheclamp

meterisrespondingtotheaveragevalue.Thecalibrationisdonewitha

conversionfactorof

1

.

111

forsinewave,whichisfoundbydividingthe

effectivevaluebytheaveragevalue.Theseinstrumentsarethereforein

erroriftheinputvoltageorcurrenthassomeothershapethansinewave.

*CF(CrestFactor)isfoundbydividingthepeakvaluebytheeffective

value.

Examples:

Sinewave:CF=

1

.

414

Squarewavewitha

1

:

9

dutyratio:CF=

3

4. INSTRUMENT LAYOUT

●ＬＣＤ

Low Battery Warning

Frequency Response :

Wide

Frequency Response :

50/60Hz

Data Hold Indication

Peak Hold Indication

Unit

Display

Frequency Selector Button

Peak Hold Button

Data Hold Button

Transform Jaws

Barrier

Trigger

Range Selector Switch

Hand Strap

Barrier:Itisapartprovidingprotectionagainstelectricalshockand

ensuringtheminimumrequiredairandcreepagedistances.

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auto-power-off

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theDataHold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.

6. OPERATING INSTRUCTIONS

6

-

1

CurrentMeasurement

#

DANGER

●

Inordertoavoidpossibleshockhazard,nevermakemeasurement

oncircuitshavingapotentialof

300

VAC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.

●

Whenmeasuringcurrentis

300

Aormore(

400

Hzormore),besure

tostopmeasurementwithin

5

minutes.Otherwise,transformerjaws

mayheattocauseafireordeformationofmoldedparts,whichwill

degradeinsulation.

●

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

40

mm

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.

●

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

(

1

)SettheRangeSelectorSwitchtothedesiredposition.Currentto

measureshouldbewithintheselectedmeasuringrange.

(

2

)Normalmeasurement(SeeFig.

1

,

2

):

 

Pressthejawtriggertoopenthetransformerjawsandclosethem

overoneconductoronly.Measuredcurrentvalueisshownonthe

display.Earthleakagecurrentorsmallcurrentthatflowsthrough

agroundedwirecanalsobemeasuredbythismethod.

(

3

)Measuringoutofbalanceleakagecurrent(SeeFig.

3

):

 

Clampontoallconductorsexceptagroundedwire.Measured

currentvalueisshownonthedisplay.

 

Fig.

1

Loadcurrent

Fig.

２

Earthleakagecurrent

Load

Load

Fig.

3

Measuringoutofbalanceleakagecurrent

Load

Load

3

-phase

3

-wiresystem

(In

4

-wiresystemwithneutral,

clampontoall

4

wires)

Single-phase

3

-wiresystem

(in

3

-wiresystemwithneutral,

clampontoall

3

wires)

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

50

Hzor

60

Hz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

50

Hzor

60

Hzfundamentalfrequency,a"high-cut"

filtercircuitinincorporatedintotheinstrumentwhichworkswhen

"

50

/

60

Hz"frequencyresponseisselectedwiththeFrequency

SelectorButton.Cut-offfrequencyofthe"high-cut"filterisabout

160

Hzwithattenuationcharacteristicofapprox.-

24

dB/octave.

WhentheFrequencySelectorButtonispressed,"

50

/

60

Hz"markis

shownontheleftsideofthedisplay.WhentheFrequencySelector

Buttonispressedagain,fequencyresponseisswitchedtoWIDE

with"WIDE"markshownonthedisplay.

OutputcharacteristicareshowninFig.

4

.

Fig.

4

KEWSNAP



2433

RFrequencyCharacteristic

-30

-20

-10

0

10

AttenuationdB〔〕

１５kk5050010k50k20k2ｋ2001002010100k

100%

50%

20%

10%

5%

Percentage

Typical characteristic"WIDE" frequency response：

，fc=8kHz-24dB/cot

Typical characteristic"50/60Hz"：

frequency response

，fc=160Hz-24dB/cot

FrequencyHz〔〕

Note:

Characteristicof-

24

dB/octiavemeansthatsignalmagnitude

declinestoaboutonesixteenthofthatattheinitialfrequencywhen

frequencydoubles.KEWSNAP

2433

Rhavethefollowingtwo

settingsfortheFrequencySelectorButton.

WIDE(

20

Hz-approx.

８

kHz):

Permitsmeasurementofcurrentsof



fundamentalfrequenciesaswellas

currentsofhighfrequenciesgenerated

bysuchequipmentasinverters

50

/

60

Hz(

20

-approx.

160

Hz):Filtersouthighfrequencycurrents

andmeasurescurrentoffundamental

frequencyonly

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

/

60

Hz"frequencyresponseisselected.

Takecurrentreadingswiththe

50

/

60

HzandWIDEfrequency

responsesrespectivelytomakeeffectiveuseoftheFrequency

SelectorButton.

6

-

3

PeakCurrentMeasurement

(

1

)SettheRangeSelectorSwitchtothedesiredposition.(Currentto

measureshouldnotexceedtheselectedmeasuringrange.)

(

2

)Select"WIDE"or"

50

/

60

Hz"withtheFrequencySelectorButton.

(

3

)Withthetransformerjawsclampedontotheconductorunder

test,pressthePeakHoldButtontosettheintermenttothepeak

measurementmode.("P"isshownonthedisplay.)

(

4

)Thedisplayreads

1

/

√

2

ofthepeakcurrentvalue.Therefore,an

rmsreadingisshownwhencurrentofasinusoidalwaveformis

measured.

(

5

)Afterpeakmeasurement,pressthePeakHoldButtontoreturnto

thenormalmeasurementmode.

Note:Whenleakagecurrentismeasuredinthepeakmeasurement

mode,thereadingmaychangeifthetransformerjawsare

openedandclosed.Pleasereadthedisplaywiththeconductor

undertestclamped,otherwise,afterfixingthedisplaybyusing

thedataholdfunction,pleaseremovetheinstrumentfromthe

conductortobemeasured,andreadthedisplay.Tomeasure

thepeakcurrentagain,pleasereleasethedatahold,andreturn

theinstrumenttothenormalmeasurementmodeoncewiththe

PeakHoldButton,thensetitinthepeakmeasurementmode.

Countsequaltoorlessthan

5

countsarecorrectedtozero.

7. OTHER FUNCTIONS

7

-

1

Auto-Power-OffFunction

Thisisafunctiontopreventtheinstrumentfrombeingleftpowered

onandconservebatterypower.Theinstrumentautomaticallyturns

offabout

10

minutesafterthelastswitchorbuttonoperation.To

returntothenormalmode,turntheRangeSelectorSwitchtoOFF,

thentothedesiredposition.

DisablingAuto-Power-OffFunction:

Todisabletheauto-power-offfunction,powerontheinstrumentwith

theDataHoldButtonpressed.About

3

secondsafterpoweringon

theinstrument,"P.OFF"isshownonthedisplay.Toenabletheauto-

power-offfunction,turnontheinstrumentwithoutpressingtheData

HoldButton.

Note:Theauto-power-offfunctionisdisabledinthepeak

measurementmode.

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auto-power-offfunctionworkswhiletheinstrumentis

inthedataholdmode,dataholdiscancelled.

92

-

1557

H

5

-

22

DISTRIBUTOR

Kyoritsureservestherightstochangespecificationsordesigns

describedinthismanualwithoutnoticeandwithoutobligations.

8. BATTERY REPLACEMENT

# WARNING

Inordertoavoidpossibleshockhazard,alwayssettheRange

SelectorSwitchtotheOFFpositionbeforetryingtoreplacethe

batteries.

# CAUTION

●

Donotmixnewandoldbatteries.

●

Installbatteriesintheorientationasshowninsidethebattery

compartment,observingcorrectpolarity.

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R

03

(AAA)

1

.

5

V

batteries.

 

(

4

)Putthebatterycompartmentcoverbackinplaceandtighten

thescrew.

Note:Foruseforalongperiodoftime,usealkalinebatteries(LR

03

).

Screw

Battery

Compartment

Cover

Batteries

DisposetheBatteries

Thismarkingmeanstheyshallbesortedoutandcollectedas

ordainedinDIRECTIVE

2006

/

66

/EC.

ThisdirectiveisvalidonlyintheEU.Whenyouremove

batteriesfromthisproductanddisposethem,discardthemin

accordancewithdomesticlawconcerningdisposal.Takearight

actiononwastebatteries,becausethecollectionsystemintheEU

onwastebatteriesareregulated.

WasteElectricalandElectronicEquipment(WEEEE)

Thismarkingmeanstheyshallbesortedoutandcollectedas

ordainedinDIRECTIVE

2006

/

66

/EC.

ThisdirectiveisvalidonlyintheEU.Whenyouremove

batteriesfromthisproductanddisposethem,discardthem

inaccordancewithdomesticlawconcerningdisposal.Takearight

actiononwastebatteries,becausethecollectionsystemintheEU

onwastebatteriesareregulated.

Tuotetiedot