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Kyoritsu Yleismittari KEW 2433R

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INSTRUCTIONMANUAL

KEW SNAP

2433R

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 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

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

032

: Measurement

categoryCAT

Ⅲ

,

300

Vandpollutiondegree

●

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

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

mm.

●

Operationconfirmingbeeps.

●

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

3. SPECIFICATIONS

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

Range Resolution MeasuringRange Accuracy(Frequencyrange)

〜

0〜100A

%rdg

dgt (

Hz)

%rdg

dgt (

〜

kHz)

100〜300A

%rdg

dgt (

Hz)

%rdg

dgt (

〜

kHz)

300〜400A

%rdg (

Hz)

%rdg (

〜

kHz)

400

〜

400

〜

400

・

CF(Crestfactor)

≦

(

〜

Hz,lessthan

600

APeak)

※

100

〜

400

A

：

sinewave

＋

%rdg

・

Countsequaltoorlessthan

countsarecorrectedtozero

・

Accuracy-insuredFrequencyrangeof

Hzmodeis

Hz.

・

The max indication at the

mA/

400

mA range is

6000

 counts.

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

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

(

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.

seconds

Sample Rate:

 Approx.

timespersecond

Accuracy-insured

 

℃±

℃

,relativehumidity

%orless

Temperature and

 (withoutcondensation)

Humidity Ranges:



Operating Temperature

 

℃

,relativehumidity

%orless

and Humidity Ranges:

 (withoutcondensation)

Storage Temperature

 -

℃

,relativehumidity

%orless

and Humidity Ranges:

 (withoutcondensation)

Operable altitude:

2000

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

Power Source:

 Two

VR

(AAA)batteries

Current Consumption:

 Approx.

Measurement Time:

 Approx.

hours

Auto-power-off Function:

Turns power off about

 minutes after the

lastswitchoperation

Safety Standard:

 IEC

61010

  IEC

61010

032

  MeasurementCAT

Ⅲ



300

V,pollutiondegree

EMC directive:

 EN

61326

,EN

61326

Environmetal standard:

 EURoHSdirectivecompliant

Overload Protection:



480

AACmax.for

seconds

Withstand Voltage:

 

4240

VACrms (

Hz) for

 sec. between

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

case(excepttransformerjawcase)

Insulation Resistance:

 

 or greater at

1000

V between metal

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

(excepttransformerjawcase)

Conductor Size:

 Approx.

mmindiametermax.

Dimensions:



185

(L)

(W)

(D)mm

Weight:

  Approx.

270

gincludingbatteries

Accessories:

 TwoR

(AAA)batteries

  CarryingcaseModel

9052

  Instructionmanual

Reference

*Effective Value (RMS)

Most alternating currents and

vol tages are expre ssed in

effective values, which are

alsoreferredtoasRMS(Root-

Mean-Square)values.

The eff ective value i s 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

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=

414

Squarewavewitha

:

dutyratio:CF=

4. INSTRUMENT LAYOUT

●ＬＣＤ

Low Battery Warning

Frequency Response :

Wide

Frequency Response :

50/60Hz

Data Hold Indication

Peak Hold Indication

Unit

Di s pl ay

Frequency Selector Button

Peak Hold Button

Data Hold Button

Tr a ns fo rm J aw s

Ba r ri er

Tr i gg er

Ra n ge S el ec to r Sw it ch

Ha n d St ra p

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

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

5. PREPARATIONS FOR MEASUREMENT

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

: 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.

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

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

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

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 (







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

(

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

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

(

)Normalmeasurement(SeeFig.

):

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.

(

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

):

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

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

Fig.

Loadcurrent

Fig.

２

Earthleakagecurrent

Load

Fig.

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

Load

-phase

-wiresystem

(In

-wiresystem with neutral,

clampontoall

wires)

Single-phase

-wiresystem

(in

-wiresystem with neutral,

clampontoall

wires)

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

Hzor

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

Hz or

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

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

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.-

dB/octave.

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

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.

.

Fig.

KEWSNAP



2433

RFrequencyCharacteristic

-30

-20

-10

Attenuation dB〔〕

１５k k50 500 10k 50k20k2ｋ2001002010 100k

100%

50%

20%

10%

Percentage

Typical characteristic "WIDE" frequency response：

　　　　，fc=8kHz -24dB/cot

Typical characteristic "50/60Hz"：

frequency response

　　　　，fc=160Hz -24dB/cot

Frequency Hz〔〕

Note:

Characteristic of -

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(

Hz-approx.

８

kHz):

Permits measurement of currents of



fundamental frequencies as well as

currentsofhighfrequenciesgenerated

bysuchequipmentasinverters

Hz(

-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"

Hz"frequencyresponseisselected.

Take current readings with the

Hz and WIDE frequency

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

SelectorButton.

PeakCurrentMeasurement

(

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

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

(

)Select"WIDE"or"

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

(

)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.)

(

)The display reads

√

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

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

measured.

(

)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

countsarecorrectedtozero.

7. OTHER FUNCTIONS

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

 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

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.

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.

1557

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.

(

)SettheRangeSelectorSwitchto"OFF."

(

)Loosenthebattery-compartment-cover-fixingscrewonthelower

backoftheinstrument.

(

)Replace the batteries with two new R

 (AAA)

V

batteries.

(

)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

Screw

Battery

Compartment

Cover

Batteries

DisposetheBatteries

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

ordainedinDIRECTIVE

2006

/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

/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

Merkki:	Kyoritsu
Kategoria:	Yleismittari
Malli:	KEW 2433R

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