KYORITSU KEW FORK 2300R User Manual

Note)When current is flowing from the upside to the underside of the instrument, reading is
positive(+), on the contrary, reading to be negative(-) when current is flowing from the
undersidetotheupsideoftheinstrument.
6-1-2ACcurrentmeasurement
(1)Setthefunctionselectorswitchto"
〜 A"position.
(" 〜 "and"A"markswillbedisplayedontheLCD.)
(2)Place one measured conductor lower than the triangle mark indicated on the fork shaped
sensorandmakeameasurement.(shadedpartinthefigure)
ThenmeasuredvalueisdisplayedontheLCD.
(Whenthecenterof theconductor isnot lowerthan thetriangle markindicated onthe fork
shapedsensor,erroroccurs.)
Note)For the measurement of AC current, zero adjustment, which is required for the
measurementofDCcurrent,isnotnecessary.Current flowingdirectionhasnorelationto
theindicationpolarity.
6-2Noncontactvoltagedetection(NCV)
 This function is to check the presence of voltage without touchingwiresor electrodes
directly.
 AlsocancheckthepresenceofACvoltageincable,outlet,fuseandcircuitbreaker.
[Details]
 While voltage isapplied to a cable oroutlet,the electric field depending onthe voltage is
generated. Thisinstrument detectsthe generated electricfield, andverifies the presenceof
ACvoltage.Officially,itiscalledasaninstrumentfordetectingelectricalfield.Butitisnota
familiar term, so we call it as "Non contact voltage detection". General detectors detect
voltage by contacting polarized voltage(contacts and terminals). But this instrument is
developedtosatisfythisfunctionandforsafetypurposewithoutcontactingvoltage.
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DANGER
● To avoid gettingan electrical shock, never make measurementon the circuit in which
electricalpotentialoverAC/DC300Vexists.
● Beforeameasurement,besuretochecktheinstrumentoperationwithwell-knownpower
supply.If"Err"isdisplayedontheLCD,donotmakeameasurement.
● Donotmakemeasurementwithbatterycoverremoved.
● Indication on NCV range isareference value. Make sure to check the voltage with a
preciseequipmentinadvancewhenoperatorwilldirectlytouchorconnectwires.
● Indication of voltage may be affected by non-grounded metal tube or metal case, the
placewhereaffectedbyothervoltages,handgriporthemeasuringpositionofsensor.
● Keepyourfingersandhandsbehindthebarrierduringmeasurement.
6-2-1Measurements
(1)Setthefunctionselectorswitchto"NCV"position.
(2)
 The sensing mode (100V or 200V) in effect is displayed on the LCD for 1min, and NCV
measurementstarts.
(3)Positionthetippartofforktypedsensoragainstthemeasuredobject.
 Whenvoltageisdetected,"Hi"willbedisplayedontheLCD.
 (Error couldoccur depending on thedirection, angle andcontact surface of theinstrument
againstthemeasuredobject.OnNCVrange,dataholdfunctioncannotbeused.
)
Note)   When set the function selector switch to NCV range, self-check function operates and
Indicates"Err",ifthereissomefaultorabnormalcondition.Donotmakeameasurementif
suchindicationdisplayedontheLCD.
5. Preparation
(1)Checkbatteryvoltage
SettheFunctionselectorswitchtothepositionotherthanOFFposition.
Battery Voltage is enough if indications are displayed clearly and "BATT" mark is not
displayed on the LCD. If "BATT" mark is indicated or no indication on the LCD, replace
batterieswithnewoneaccordingtobatteryreplacementproceduresshowninclause8inthis
document.
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CAUTION
● IndicationsmaynotbeingdisplayedontheLCDdespitethefunctionselectorswitchisat
thepositionotherthanOFFposition.
Thisisbecausepower-offfunctionoperatedautomaticallyandtheinstrumentturnedoff.
Powerofffunctioncanbereleased byturningthefunction selectorswitchto OFF,and
thensetittotherangeonwhichyouwouldliketomakeameasurement.
IfLCDstillblank,batteriesarecompletelyexhausted.Pleasereplacebatteries.
(2)Checkthefunctionselectorswitchissettotheappropriaterange.Andalsocheckdatahold
function is not enabled. If inappropriate range is selected, desired measurement cannot be
made.
6. Measurements
6-1CurrentMeasurement
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 DANGER
● To avoid gettingan electrical shock, never make measurementon the circuit in which
electricalpotentialoverAC/DC300Vexists.
● Donotmakemeasurementwithbatterycoverremoved.
● Keepyourfingersandhandsbehindthebarrierduringmeasurement.
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 CAUTION
● Max.diameterofmeasuredobject(conductor)is Φ 10mm.
6-1-1DCcurrentmeasurement
(1)Setthefunctionselectorswitchto"
A"position.
 (" "and"A"markswillbedisplayedontheLCD.)
(2)PressHOLD/0ADJbuttonfor2secormoretoenable0ADJfunctionandadjusttheindication
ontheLCDtobe0.
(Indicationshallbeadjustedto0.Otherwise,erroroccurs.)
(3)Place one measured conductor lower than the triangle mark indicated on the fork shaped
sensorandmakeameasurement.(shadedpartinthefigure)
ThenmeasuredvalueisdisplayedontheLCD.

(Whenthe centerof theconductor isnot lowerthan thetriangle markindicated onthe fork
shapedsensor,erroroccurs.)
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.
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WARNING
● Readthroughandunderstandinstructionscontainedinthismanualbeforestartingtouse
theinstrument.
● Saveandkeepthemanualhandytoenablequickreferencewhenevernecessary.
● Besuretousetheinstrumentonlyinitsintendedapplications.
● Besuretounderstandandfollowallsafetyinstructionscontainedinthemanual.
Besuretoobserveaboveinstructions.
Failuretofollowtheaboveinstructionsmaycauseinjury,instrumentdamageand/ordamage
toequipmentundertest.
Thesymbol
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indicatedontheinstrumentmeansthattheusermustrefertorelatedparts
in the manual for safe operation of the instrument. Be sure to carefully read the
instructionsfollowingeach
#
symbolinthismanual.
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

DANGER   isreservedforconditionsandactionsthatarelikelytocauseseriousorfatal
injury.
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  WARNING   is reserved for conditions and actions that can cause serious or fatal
injury.
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  CAUTION   is reserved for conditions and actions that can cause minor injury or
instrumentdamage.
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.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marke
 dnexttothissymbol.
IndicatesAC(AlternatingCurrent).
IndicatesDC(DirectCurrent).
IndicatesACandDC.
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DANGER
● NevermakemeasurementonthecircuitaboveAC/DC300V.
● 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.
● 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.
● Donotopenthebatterycoverandtheinstrumentcase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.
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WARNING
● Neverattempttomakeanymeasurement,iftheinstrumenthasanystructuralabnormality
noted,suchascrackedcaseor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.
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CAUTION
● Alwaysmake suretocheck thefunctionselector switchisset totheappropriate range
beforestartingmeasurement.
● Donotexposetheinstrumenttothedirectsun,hightemperatureandhumidityordewfall.
●  Be sure to set the function selector switch to the "OFF" position after use. When the
instrumentwillnotbeinuseforalongperiod,placeitinstorageafterremovingthebatteries.
● Useaclothdippedinwaterorneutraldetergentforcleaningtheinstrument.Donotuse
abrasivesorsolvents
Fork Jaws
Barrier
Function Selector Switch
Data Hold / Zero Adjustment Button
Hand Strap
Display
Low Battery Warning
AC/DC
NCV Range
Data Hold Mode
Unit
Fork Jaws
Barrier
Function Selector Switch
Data Hold / Zero Adjustment Button
Hand Strap
Display
Low Battery Warning
AC/DC
NCV Range
Data Hold Mode
Unit
Place the center of the
measured conductor lower
than the triangle mark indicated
on the fork shaped sensor.
(shaded part in the figure)
 IEC61326(EMCstandard)
 EN50581(RoHS)
●Indication  LCDMax.1049units,symbols
●Over range display  "OL"symbolisdisplayedontheLCD.
 (Onlyoncurrentrange)
●Response time  Approx.2sec.
●Sampling rate  Approx.twicepersecond
●Location for use  Indooruse,Altitudeupto2000m
●Temperature &
Humidity range
(guaranteed accuracy)
 23 ℃± 5 ℃
 Relativehumidity:75%orless(nocondensation)
●Operating Temperature &
Humidity range
 0 〜 40 ℃
 Relativehumidity:85%orless(nocondensation)
●Storage Temperature &
Humidity range
 -20 〜 60 ℃
 Relativehumidity:85%orless(nocondensation)
●Power source  DC3V:R03(UM-4)x2pcs
●Current consumption  Approx.12mAorless
 Todecreasecurrentconsumption,detectingcircuitisononlyfor
0.1/0.5sec.
●Power off function  Powerofffunctionoperatesautomaticallyafteraswitchremains
for10min.
●Overload Protection  AC/DCcurrent:AC/DC120A/10sec.
 ACvoltage(NCV):AC360V/10sec.
●Withstand Voltage  AC3470VforFivesec.
 (Betweenelectricalcircuitandenclosures.)
●Insulation Resistance  10M Ω /1000V
 (Betweenelectricalcircuitandenclosures.)
●Max. diameter of
measured object
 Max.10mm
●Dimensions  161.3(L)x40.2(W)x30.3(D)mm
●Weight  110g(includingbatteries)
●Accessories  BatteryR03---------------------2
 Instructionmanual------------1
 Carryingcase-------------------1
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:4dutyratio:CF=2
3. Specification
ACcurrent 〜 A
DCcurrent A
ACvoltage 〜 V
Note)NCVrangeiscalibratedtodetectthevoltage,wherenon-groundedsinglewire,AC80Vor
more.However,detectingsensitivitymaybeaffected bytheabsenceofgroundedornon-
groundedmetaltubeormetalcase.Alsoitmaybeaffectedintheplacewhereinfluenced
byothervoltages,howyougriptheinstrumentorthemeasuringpositionofsensor.
● CF(Crest Factor)  CF=2.5orless
● Standards  IEC61010-1
  MeasurementCATIII300V,pollutiondegree2
  IEC61010-2-032
InstructionManual
6-2-2Sensingmode
● Therearetwotypesofsensingmode:100Vmodeand200Vmode.
● Abovetwomodescanbechangedoverbypressingthedataholdbutton2secormore.
(The selectedsensing modeisstored evenif switching offthe instrument. Whensetting the
functionswitchto"NCV"again,measurementcanbedoneonthesamemode.)
● Factorysetting:200Vmode
(1)100Vmode
Sensitivityonthismodeissetsharp,therefore,thepresenceofACvoltagecanbechecked
onlybyplacingtheinstrument closertothemeasuredobject,suchasanoutlet,aplugand
parallelcords,asshowninfigure.
(2)200Vmode
Sensitivityonthismodeissetdull,sotheearthsideandnon-earthsideof100Vcableway
candeverified.(Wherecablesarecrowded,suchasinadistributionboard,earthsidecould
notbeverified.)
AlsocancheckthepresenceofACvoltagein200Vcableway,plug,outlet,fuseandcircuit
breaker.
7. Other functions
7-1Autopowerofffunction
 Thisfunctioncauses theinstrumenttoautomaticallyenter thepower-offmodeabout10min 
afterthelastfunctionselectorswitchoperation.
 Toreleasethepower-offfunction,turnofftheinstrumentandthenturnonagain.
7-2Dataholdfunction(OnlyonACA/DCArange)
 Thisis afunction toholdthemeasuredvalue onthe LCD."H" markisshown onthe LCD
whiletheinstrumentisinthedataholdmode.Toexitthedataholdmode,pressthedatahold
buttonagain.
Note)
 The measured value being held will be released when auto power-off functionoperates
whiledataholdfunctionisoperating.
8. Battery replacement
#
WARNING
● To avoidgetting electrical shock, besure to set thefunction selector switchto"OFF"
positionbeforetryingtoreplacethebatteries.
#
 CAUTION
● Donotmixnewandoldbatteries.
● Makesuretoinstallbatteryincorrectpolarityasindicatedinsidethebatterycover.
When"BATT"markisshownontheupperleftcorneroftheLCD,replacethebatteries.
Notethatthebatteryiscompletelyexhausted,theLCDblankswithout"BATT"markshown.
(1)Setthefunctionselectorswitchto"OFF"position.
(2)
 Unscrewthe batterycoverfixingscrews andremovethe batterycoveronthebottomofthe
instrument.Thenreplacenewbatteries.(R03x2pcs)
Range
ACA
Measuringrange
０〜 100A
Accuracy
± 2.0 ％ rdg ±５ dgt （ 50 ／ 60Hz ）
± 3.0 ％ rdg ±５ dgt （ 50 ／ 60Hz ）
CF(Crestfactor)
CF
≦２
２＜ CF ≦ 2.5
Range
DCA
Measuringrange
０〜± 100A
Accuracy
± 2.0 ％ rdg ±５ dgt
Range
NCV
Measuringrange
AC300Vorless
Action
Normalcondition:Lo
Atvoltagedetecting(singlewireAC80Vormore):Hi
92-1556E8-16
4. INSTRUMENT LAYOUT
DISTRIBUTOR
Kyoritsu reserves the rights to change specifications or
designsdescribedinthismanualwithoutnoticeandwithout
obligations.
AC/DCFORKCURRENTTESTER
KEW 2300R
KEW FORK
Co rre ct
Wrong
2. Features
● Thisinstrument,Forkcurrenttester,canmeasureAC/DCcurrentupto100Awithoutopening
andclosingtheJaws.
● TrueRMSreadingforACcurrent
● Forkshapedsensorforeasymeasurementattightplacesandcrowdedcableareas.
● NCVfunction(NonContactVoltage)enableslivewirecheck
● Autopowerofffunction
● Dataholdfunction
● Pocketsizehandytester,adoptedover-moldingforabetterfit
● Carryingcasefurnishedasastandardaccessory.
● Designedtointernationalsafetystandards.
IEC61010-2-032measurementCAT.III300VPollutiondegree2
○ 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).
O: Device which is
not directly
connected to the
mains power supply
Barrier:It is a part providing protection against electrical shock and ensuring the minimum
requiredairandcreepagedistances.
KYORITSU ELECTRICAL INSTRUMENTS
WORKS, LTD.
#


KYORITSU KEW FORK 2300R Specifications

General

Display	LCD
AC A Accuracy	±1.5%rdg±5dgt
AC V Accuracy	±1.5%rdg±5dgt
DC V Accuracy	±1.0%rdg±3dgt
Continuity	Yes
Safety Standard	IEC 61010-1 CAT III 600 V
Power Source	Battery
Type	Clamp Meter
AC Voltage Measurement Range	0 to 600 V
DC Voltage Measurement Range	0 to 600 V
Conductor Size	Max. 30mm diameter

Summary

Safety Warnings and Precautions

Safety Symbols and Indicators

Explanation of symbols used on the instrument and in the manual for user safety.

General Usage Precautions

Important safety guidelines to follow during operation and measurement.

Product Features

Measurement Capabilities

Details on the instrument's ability to measure AC/DC current and voltage, including TRUE RMS.

Technical Specifications

AC/DC Current Measurement

Specifications for AC and DC current measurement ranges and accuracy.

AC Voltage Measurement

Measurement Procedures

DC Current Measurement

Non-Contact Voltage Detection

Battery Replacement

Safety Precautions

Important warnings and cautions before replacing the instrument's batteries.

Replacement Procedure