KYORITSU KEW 2003A User manual

INSTRUCTION MANUAL
KEW SNAP SERIES
KEW 2003A
DIGITAL CLAMP METER

Contents
1.SafetyWarnings ························································································ 1
2.Features
····································································································· 5
3.Specifications
··························································································· 6
4.InstrumentLayout
··················································································· 9
5.PreparationforMeasurement
································································ 12
6.Measurement
6-1DCCurrentMeasurement
······························································ 13
6-2ACCurrentMeasurement
···························································· 15
6-3DCVoltageMeasurement
···························································· 16
6-4ACVoltageMeasurement
··························································· 17
6-5ResistanceMeasurement
······························································ 18
6-6ContinuityCheck
·········································································· 19
6-7MAXMeasurement
······································································· 20
7.OtherFunctions
7-1SleepFunction
·············································································· 21
7-2DataHoldFunction
······································································ 22
7-3OUTPUTTerminal
······································································ 23
8.BatteryReplacement
············································································ 25
9.OptionalAccessories
············································································ 26
10.DisposingtheProduct
········································································· 27

 1 
1. Safety Warnings
This instrument has been designed, manufactured and tested
according to IEC 61010-1: Safety requirements for Electronic
Measuringapparatus,anddeliveredinthebestconditionafterpassed
theinspection.Thisinstructionmanualcontainswarningsandsafety
procedureswhichhavetobeobservedtoensuresafeoperationofthe
instrumentandmaintainitinasafecondition.Thus,theseoperating
instructionshavetobereadpriorto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.
󱾀 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.
Failure to follow the above instructions may cause injury,
instrumentdamageand/ordamagetoequipmentundertest

 2 
The symbol #  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.
# 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.
Following symbols are used on the instrument and in the instruction
manual.Attentionshouldbepaidtoeachsymboltoensureyoursafety.
#
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).

IndicatesDC(DirectCurrent).
IndicatesACandDC.
# DANGER
󱾀 Nevermakemeasurementonacircuitinthefollowingcategories;
Measurementcategory Ⅳ (CAT. Ⅳ ) :overAC/DC600V
Measurementcategory Ⅲ (CAT. Ⅲ )orlower :overAC750V/DC1000V
󱾀 Do not make measurement when thunder is rumbling. Stop
measurementandtakeofftheinstrumentfromtheobjectundertest.
󱾀 Do not attempt to make measurement in the presence of

 3 
flammablegasses,fumes,vaporordust.Otherwise,theuseofthe
instrumentmaycausesparking,whichcanleadtoanexplosion.
󱾀 The transformer jaws are made of metal and their tips are not
insulated.
Where equipment under test has exposed conductive parts, be
especially careful about the hazard of possible shorting. Not
followingthisinstructionmaycandangertotheuser.
󱾀 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.
󱾀 Toavoidelectricalshockbytouchingtheequipmentundertestor
itssurroundings,besuretowearinsulatedprotectivegear.
󱾀 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.
# WARNING
󱾀 Adhere to local and national safety codes. Individual protective
equipmentmust beused toprevent shockand arcblast injurywhere
hazardousliveconductorsareexposed.
󱾀 Never attempt to make any measurement, if the instrument has any
structuralabnormalitysuchascrackedcaseandexposedmetalpart.
󱾀 Do not turn the Function Selector switch with test leads
connectedtotheinstrument.
󱾀 Do not install substitute parts or make any modification to the
instrument.Returntheinstrumenttoyourdistributorforrepairor
recalibration.
󱾀 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.
󱾀 AlwaysbesuretokeepyourfingersandhandsbehindtheSafety
barrier.
(see ⑯ of 4.InstrumentLayout )Otherwise,usermaybeexposedto
thedangerofelectricalshock.
󱾀 AlwaysattachtheCapontothetipmetalpartswhenusingthetestlead
intheMeasurementCategoryIII.(CAT.III)orhigherenvironments.
When the test leads are connected to the instrument, the lower
category(voltage)eitherofthembelongstoisapplied.

 4 
# CAUTION
󱾀 Make sure that the Function Selector switch is set to an
appropriatepositionbeforemakingmeasurement.
󱾀 Alwaysmakesuretoinserteachplugofthetestleadsfullyinto
theappropriateterminalontheinstrument.
󱾀 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
oftime,placeitinstorageafterremovingthebatteries.
󱾀 Do not expose the instrument to the direct sun, extreme
temperaturesordewfall.
󱾀 Useadamp clothanddetergent forcleaningthe instrument.Do
notuseabrasivesorsolvents.
󱾀 Takesufficient carenot toapplyshocksuchasdrop.Otherwise,
preciselyadjustedTransformerjawswillbedamaged.
󱾀 Be careful not to pinch some foreign substances with the
Transformerjawtips.
󱽾 Measurementcategories(Over-voltagecategories)
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 overcurrent
protectiondevice(distributionpanel).
O: Device which is
not directly
connected to the
mains power supply

 5 
2. Features
󱾀 Tear-drop-shapedjawsforeaseofuseincrowdedcableareasand
othertightplaces
󱾀 Providesawidemeasuringrangefrom0upto2000A
󱾀 Terminal cover to avoid the use of incorrect use of the input
terminals.
󱾀 MAX measurement function for easy reading of maximum input
overacertainperiodoftime
󱾀 Outputterminalforlongtermcurrentmonitoring
󱾀 Safetydesignthroughoutconformingtothefollowingprovisionsof
IEC61010-1
 Pollutiondegree2,overvoltagecategory
Ⅳ 600V
 Pollutiondegree2,overvoltagecategory
Ⅲ 1000V
󱾀 Dataholdfunctiontoallowforeasyreadingsindimlylitorhard-
to-readlocations.
󱾀 Sleepfeaturetoconservebatterypower.
󱾀 Permitseasycontinuitycheckwithabeeper
󱾀 Providesadynamicrangeof4,000countsfullscale
󱾀 Widefrequencyrangefrom40Hzto1kHz
󱾀 Transformerjawsfittedwillguardtofurtherimprovesafety

 6 
3. Specifications
MeasuringRangesandAccuracy(at23 ± 5 ℃ ,45to85%RH)
DCCurrent


Range MeasuringRanges Accuracy
400A 0to
± 399.9A
± 1.5%rdg ± 2dgt
2000A 0to
± 1999A
ACCurrent


Range MeasuringRanges Accuracy
400A 0to399.9A
± 1.5%rdg ± 2dgt(50/60Hz)
± 3.0%rdg ± 4dgt(40 〜 500Hz)
± 5.0%rdg ± 4dgt(500 〜 1kHz)
2000A 0to1000A
± 1.5%rdg ± 2dgt(50/60Hz)
± 3.0%rdg ± 4dgt(40 〜 500Hz)
± 5.0%rdg ± 4dgt(500 〜 1kHz)
1001to1999A
± 3.0%rdg ± 2dgt(50/60Hz)
DCVoltage(Inputimpedance:2M
Ω ) 

Range MeasuringRanges Accuracy
400V 0to
± 399.9V
± 1.0%rdg ± 2dgt
1000V 0to
± 999V
ACVoltage(Inputimpedance:2M
Ω ) 

Range MeasuringRanges Accuracy
400V 0to399.9V
± 1.5%rdg ± 2dgt(50/60Hz)
750V 0to749V
± 1.5%rdg ± 4dgt(40 〜 1kHz)
Resistance(Auto-ranging)
Range MeasuringRanges Accuracy
400
Ω 0to399.9 Ω±
1.5%rdg ± 2dgt
4000
Ω 150to3999 Ω
Resistance(Fixed)
Range MeasuringRanges Accuracy
400
Ω 0 〜 399.9 Ω ± 1.5%rdg ± 2dgt(Buzzerbeepsat50 ± 35 Ω ofless)

 7 
OUTPUTVoltage(Outputimpedance:about10k Ω )
Range DCOutputVoltages InputCurrents Accuracy
DC 400A 0to400.0mV 0to400A
± 1.5%rdg ± 3mV
2000A 0to200.0mV 0to2000A ± 1.5%rdg ± 3mV
AC
400A 0to400.0mV 0to400A
± 1.5%rdg ± 3mV(50/60Hz)
± 3.0%rdg ± 3mV(40 〜 500Hz)
± 5.0%rdg ± 3mV(500 〜 1kHz)
2000A 0to100.0mV 0to1000A
100.1to200.0mV 1001to2000A ± 3.0%rdg ± 3mV(50/60Hz)
*Electromagneticcompatibility(EN61000-4-3)
:RFfieldstrength=<=1V/m,totalaccuracy=specifiedaccuracy
: RFfieldstrength=3V/m,totalaccuracy=specifiedaccuracy+1%ofrange
󱾀 OperatingSystem :DualIntegration
󱾀 Display :Liquid crystal display with maximum
countsof4000
󱾀 LowBatteryWarning :"BAIT" symbol is displayed on the digital
display.
󱾀 OverrangeIndication :On each range, when the measured value
exceeds the measuring range, "OL" mark
appearsontheLCD.
󱾀 ResponseTime :Approx.2seconds
󱾀 Samplerate :Approx.2.5timespersecond
󱾀 Locationforuse :Indoor/Outdooruse,Altitudeupto2000m
󱾀 TemperatureandHumidityforGuaranteedAccuracy
 :23
℃ ± 5,relativehumidityupto85%
withoutcondensation
󱾀 OperatingTemperatureandHumidity
 :0to40
℃ ,relativehumidityupto85%
withoutcondensation
󱾀 StorageTemperatureandHumidity
 :-20to60
℃ ,relativehumidityupto90%
withoutcondensation

 8 
󱾀 PowerSource :TwoR6P(DC1.5V)batteriesorequivalent
󱾀 CurrentConsumption :Approx.9mAmax
󱾀 Sleepfunction :Automatically switches to the Sleep mode
inabout10minutesafterthelastswitchor
button operation (current consumption in
theSleepmode:about20
μ A)
󱾀 SafetyStandard : IEC61010-1,IEC61010-2-032,IEC61010-2-033,
 IEC61010-031pollutiondegree2
  overvoltageCAT.
Ⅳ 600V
  overvoltageCAT.
Ⅲ 1000V
󱾀 EMC :EN61326-1
 :EN61326-2-2
 :EN55011
󱾀 RoHS :EN50581
󱾀 OverloadProtection : AC/DCcurrentranges2400AAC/DCfor10sec
  AC/DCvoltageranges1200VAC/DCfor10sec
 Resistanceranges600VAC/DCfor10sec
󱾀 WithstandVoltage :6720VACfor5seconds
 (between electrical circuit and housing
casesormetalpartsofjaws)
󱾀 InsulationResistanc :10M Ω orgreaterat1000V
 (between electrical circuit and housing
casesor,metalpartsofjaws)
󱾀 ConductorSize :Approx.55mmdiametermax
󱾀 Dimensions :250(L) × 105(W) × 49(D) ㎜
󱾀
Weight :Approx530g
󱾀 Accessories :TestleadsM-7107A ………… 1set
 :R6Pbatteries
…………………… 2
 :CarryingcaseM-9094
………… 1
 :OutputPlugM-8201
…………… 1
 :Instructionmanual
……………… 1
󱾀 Accessories :Multi-TranM-8008
 :OutputLeadM-7256

 9 
4. Instrument Layout
① TransformerJaws:Includecurrentsensors
② JawTrigger:Usedtoopenandclosethetransformerjaws
③ FunctionSelectorSwitch
Selects function to use. Also switches off the instrument when
settothe"OFF"position.
④ DataHoldButton
Freezes the display reading with   symbol shown on the
displaywhenpushedin.
①
⑯⑮
②
③
④
⑧
⑦
⑨
⑤
⑥
⑬
⑩ ⑪ ⑫ ⑭

 10 
⑤ AC/DCButton
UsedtoswitchtheinstrumentbetweentheACandDCmodes.
The instrument is set to the AC mode when it is powered on.
PressthisbuttontoselecttheDCmode.
⑥ ModeButton
A press of this button on a current or voltage range turns the
instrumenttotheMAXmeasurementmodewith
  shownon
thedisplay.PressthebuttonagaintoexittheMAXmode.
 Apressofthebuttonontheresistancerangeturnstheinstrument
to the continuity check mode with
 symbol shown on the
display.Inthismode,thebuzzerbeepswhenthereadingisabout
50
Ω orless. Pressthe buttonagainto exitthecontinuity check
mode.
⑦ ZeroADJ./RESETButton
Used for zero adjustment on 400A DC range or for resetting
the reading in the MAX mode.
  symbol is shown on the
display when zero adjustment is enabled on 400A DC range.
(Zeroadjustmentisavailableonlyon400ADCrange.)
⑧ LCDDisplay
Fieldeffect typeofliquidcrystaldisplaywithmaximumcounts
of 3999 and microprocessor-controlled annunciators and the
decimalpoint.

 11 
⑨ TerminalCover
Used to enclose the input terminals (COM and V/ Ω ) when the
OUTPUTterminalisinuse,thusavoidingaccidentalapplication
ofvoltagetotheinstrument.
⑩ OUTPUTTerminal(forcurrentmeasurementonly)
Provides DC voltage in proportion to the reading on an AC or
DCcurrentrange.Thevoltageisusedforsuchpurposesaslong
termmonitoringwitharecorderorotherrecordingdevices.This
terminalcannotbeaccessedonavoltageorresistancerange.
⑪ COMTerminal
Acceptstheblacktestleadforvoltageorresistancemeasurement.
⑫ V/ Ω Terminal
Acceptstheredtestleadforvoltageorresistancemeasurement.
⑬ SafetyHandStrap
Preventstheinstrumentfromslippingoffthehandcuringuse.
⑭ TestLeads(M-7107A)
Connect to COM and V/ Ω  Terminal terminals for resistance
measurement.
⑮ OutputPlug(M-8201)
Insertthisplugintothe OUTPUTterminaltoobtainDC output
voltage.Connectsuitableconnectioncordtotheplugwhenitis
used.
⑯ Barrier
It is a part providing protection against electrical shock and
ensuringtheminimumrequiredairandcreepagedistances.

 12 
5. Preparation for Measurement
5-1CheckingBatteryVoltage
 SettheFunctionSelectorswitchtoanypositionotherthan"OFF".
When the display is clear without   showing, proceed to
measurement.
 Whenthedisplayblanksor  isshown,replacethebatteries 
accordingtosection
8:BatteryReplacement 
NOTE
The Sleep function automatically turns the instrument off in a
certainperiodoftimeafterthelastswitchoperation.Therefore,the
display may be blank with the Function Selector switch set to a
positionotherthan"OFF".
To operate the instrument in this case, set the switch back to the
"OFF"position,thentothedesiredposition,orpressanybutton.If
the display still blanks, the batteries have exhausted. Replace the
batteries.
5-2CheckingSwitchSetting
MakesurethattheFunction Selectorswitchis setto thecorrect
position, the instrument is set to the correct mode and the Data
Hold function is deactivated. Otherwise, desired measurement
cannotbemade.

 13 
6. Measurement
6-1 DCCurrentMeasurement
# DANGER
󱾀 Toavoidelectricshock,nevermakemeasurementonacircuitin
thefollowingcategories;
Measurementcategory Ⅳ (CAT. Ⅳ ) :overAC/DC600V
Measurementcategory Ⅲ (CAT. Ⅲ )orlower:overAC750V/DC1000V
󱾀 Do not make measurement with the battery compartment cover
removedfromtheinstrument.
󱾀 Donotmakecurrentmeasurementwiththetestleadsconnected
totheinstrument.
󱾀 Keep your fingers and hands behind the barrier during
measurement.
a.SettheFunction Selector switch tothe"400A" position and press
theAC/DCbuttontoselecttheDCmode."DC"shouldbeshownon
theupperleftcornerofthedisplay.
b.Withthetransformerjawsclosedwithoutclampingthemontothe
conductor,presstheZeroADJ.buttonforaboutonesecondtozero
adjustthedisplay.(TheZeroADJbuttonisenabledonlyon400A
DCrange.)
  shouldbeshownonthedisplay.
c.SettheFunctionSelectorswitchtothepositionappropriateforthe
orderofthecurrentundertest.

 14 
d.Press the trigger to open the transformer jaws and clamp them
ontotheconductorundertestandtakethereadingonthedisplay
NOTE
◇ During current measurement, keep the transformer jaws fully
closed. Otherwise, accurate measurement cannot be made. The
maximummeasurableconductorsizeis55mmindiameter.
◇ When the current flows from the upside (the display side) to
the underside of the instrument, the polarity of the reading is
positiveandviceversa.
◇ TheoutputvoltagefromtheOUTPUTterminalmaynotreduce
to nil even if the display is zero adjusted with the Zero ADJ
button. In this case, make zero adjustment on the recorder or
otherdevicethattheoutputvoltageisconnectedto.

 15 
6-2 ACCurrentMeasurement
# DANGER
󱾀 Toavoidelectricshock,nevermakemeasurementonacircuitin
thefollowingcategories;
Measurementcategory Ⅳ (CAT. Ⅳ ):overAC600V
Measurementcategory Ⅲ (CAT. Ⅲ )orlower:overAC750V
󱾀 Do not make measurement with the battery compartment cover
removedfromtheinstrument.
󱾀 Donotmakecurrentmeasurementwiththetestleadsconnected
totheV/
Ω andCOMterminals
󱾀 Keep your fingers and hands behind the barrier during
measurement.
a.SettheFunctionSelectorswitchtothe"400A"or"2000A"position
andselecttheACmode.IftheinstrumentisintheDCmode,press
theAC/DCbuttononcetoselecttheACmode.(Theinstrumentis
settotheACmodewhenitispoweredon.)"AC"shouldbeshown
ontheupperleftcomerofthedisplay.
b.Press the trigger to open the transformer jaws and clamp them
ontotheconductorundertestandtakethereadingonthedisplay.
◇ During current measurement, keep the transformer jaws fully
closed. Otherwise, accurate measurement cannot be made. The
maximummeasurableconductorsizeis55mmindiameter.
◇ Unlike in DC current measurement, zero adjustment is not
necessaryin ACcurrentmeasurement. Thereis nopolarityinthe
readingeither

 16 
6-3 DCVoltageMeasurement
# DANGER
󱾀 Toavoidelectricshock,nevermakemeasurementonacircuitin
thefollowingcategories;
Measurementcategory Ⅳ (CAT. Ⅳ ):overDC600V
Measurementcategory Ⅲ (CAT. Ⅲ )orlower:overDC1000V
󱾀 Do not make measurement with the battery compartment cover
removed
󱾀 Keep your fingers and hands behind the barrier during
measurement.
a.SettheFunctionSelectorswitchtothe"400V"or"1000V"position.
b.Slidetheterminalcovertotheleft.Plugtheredtestleadintothe
V/
Ω terminalandtheblacktestleadintotheCOMterminal.
c.Connect the other end of the tip of the red test lead the positive
side of the circuit under test and the tip of the black test lead to
thenegativeside.Takethereadingonthedisplay.Ifthetestlead
connectionisreversed,the"
− "signisshownonthedisplay.

 17 
6-4 ACVoltageMeasurement
# DANGER
󱾀 Toavoidelectricshock,nevermakemeasurementonacircuitin
thefollowingcategories;
Measurementcategory Ⅳ (CAT. Ⅳ ):overAC600V
Measurementcategory Ⅲ (CAT. Ⅲ )orlower:overAC750V
󱾀 Do not make measurement with the battery compartment cover
removed
󱾀 Keep your fingers and hands behind the barrier during
measurement.
a.SettheFunction Selectorswitchtothe"400V"or"750V"position.
IftheinstrumentisintheDCmode,presstheAC/DCbuttononce
to select the AC mode. (The instrument is set to the AC mode
whenitispowered on.) The"AC"shouldbe shown on theupper
leftcornerofthedisplay.
b.Slidetheterminalcovertotheleft.Plugtheredtestleadintothe
V/
Ω terminalandtheblacktestleadintotheCOMterminal.
c.Connectthetipofthetestleadstothecircuitundertest.Takethe
readingonthedisplay.

 18 
6-5 ResistanceMeasurement
# DANGER
󱾀 Never try to make measurement on a circuit that is not
deenergized.
󱾀 Do not make measurement with the battery compartment cover
removed.
󱾀 Keep your fingers and hands behind the barrier during
measurement.
a.SettheFunctionSelectorswitchtothe(
Ω /   )position.
b.Slidetheterminalcovertotheleft.Plugtheredtestleadintothe
V/
Ω terminalandtheblacktestleadintotheCOMterminal.
c.Check that the display reads "OL". Then, short the tip of the test
leadstogetherandcheckthatthedisplayreads"0".
d.Connectthetipofthetestleadstothecircuitundertestandtake
thereadingonthedisplay.
NOTE
◇ When the tip of the test leads is shorted together, the display
may read a very small resistance instead of "0". This is the
resistanceofthetestleads,notafault.
◇ Ifoneofthetestleadshasabreak,thedisplayreads"OL".