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Kyoritsu Multimeter 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
●
Readthrough 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 nomeans liable for any damage resultingfrom the
instrumentincontradictiontothiscautionarynote.
The symbol
#
indicatedon the instrumentmeans that the user
mustrefertorelated partsofthemanualforsafeoperationofthe
instrument. Besureto carefully readthe instructionsfollowing
each
#
symbolinthismanual.
#DANGER
isreservedforconditionsandactions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markedon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 exce ed the maximum allo wable 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.
●
Theinstrument is be used only in its intended applicationsor
conditions. Otherwise, safety functions equipped with the
instrument doesn
twork, andinstrument 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 substituteparts or makeany 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 switchis set to an
appropriatepositionbeforemakingmeasurement.
●
Do not expose the instrument to the directsun, 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adampcloth anddetergent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distortedwaveform.
●
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 shapedjaws 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)
Range Resolution MeasuringRange Accuracy(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.readingof
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 afterthe
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
voltag es are expre s s ed in
effective values, which are
alsoreferredtoasRMS(Root-
Mean-Square)values.
The e ffective value is the
square root of the average of
squareofalternatingcurrentor
voltagevalues.Manyclampmetersusinga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
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
5
-
1
CheckingBatteryVoltage
Setthe RangeSelector Switchto anyposition otherthan theOFF
position.Ifthemarksonthedisplayisclearlyvisiblewithout"BATT"
markshowing,batteryvoltageisOK.Ifthedisplayblanksor"BATT"
is indicated, replace the batteries according to section
8
: Battery
Replacement.
NOTE
When the instrument is left poweredon, the auto-power-off
functionautomatically shut the power off; Thedisplay 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, thebatteriesarecompletelyexhausted.
Replacethebatteries.
5
-
2
CheckingSwitchSetting
MakesurethattheRange SelectorSwitchis settothe appropriate
range.
Al s o ma ke s ur e t hat  da ta  ho ld  fu nc ti on i s n ot  en ab le d.  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orgreater.
●
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currentis
300
Aormore(
400
Hzormore),besure
tostopmeasurementwithin
5
minutes.Otherwise,transformer jaws
mayheattocauseafireordeformationofmoldedparts,whichwill
degradeinsulation.
●
Keepyourfingersandhandsbehindthebarrierduringmeasurement.
# 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 closethe 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 generatinglarge 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leakagecurrent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 allconductors 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
-wiresystem with neutral,
clampontoall
4
wires)
Single-phase
3
-wiresystem
(in
3
-wiresystem with neutral,
clampontoall
3
wires)
6
-
2
HowtoUseFrequencySelectorButton
Whenhighfrequenciesfromsuchequipment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
Hzfundamental 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theleftsideofthedisplay.WhentheFrequencySelector
Buttonis pressedagain, fequency responseis switchedto 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
Attenuation dB〔 〕
１ ５k k50 500 10k 50k20k2ｋ2001002010 100k
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
Frequency Hz〔 〕
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highfrequencies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,
switchingregulators, etc. When the high frequency noise from such
appliances leaks or flowsinto the ground through capacitors not
filtering completely, the earth leakagebreaker 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 thepeak 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,andreturn
theinstrument to the normal measurement modeonce 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RangeSelectorSwitchtoOFF,
thentothedesiredposition.
DisablingAuto-Power-OffFunction:
Todisabletheauto-power-offfunction,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
DateHoldFunction
Thisisafunctiontofreezethereadingsonthedisplay. Whenthe
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insidethe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thelower
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inplaceandtighten
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besorted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
accordancewith domestic law concerning disposal. Take a right
actiononwastebatteries,becausethecollectionsystemintheEU
onwastebatteriesareregulated.
WasteElectricalandElectronicEquipment(WEEEE)
Thismarkingmeanstheyshallbesorted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concerningdisposal. Take aright
actiononwastebatteries,becausethecollectionsystemintheEU
onwastebatteriesareregulated.

Produktspecifikationer

Varumärke: Kyoritsu
Kategori: Multimeter
Modell: KEW 2433R

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