KYORITSU KEW 1012 User manual

KEW1012
オートレンジ デジタル マルチメータ・AUTORANGEDIGITALMULTIMETER
KYORITSUELECTRICALINSTRUMENTS
WORKS,LTD.,
取扱説明書
INSTRUCTIONMANUAL

―12―
1.SafetyWarnings
Thisinstrumenthasbeendesigned,manufacturedandtestedaccordingtothefollowingstandards.
IEC61010-1MeasurementCAT.Ⅲ300VPollutiondegree2
IEC61010-031
IEC61326
Thisinstructionmanualcontainswarningsandsafetyruleswhichmustbeobservedbytheusertoensuresafeoperationoftheinstrumentandretainitinsafe
condition.Therefore,readthroughtheseoperatinginstructionsbefore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.
●Thisinstrumentshouldonlybeusedbysuitablytrainedpersonandbesuretofollowmeasurementproceduresdescribedinthemanual.Kyoritsuassumesno
responsibilityfordamageandinjurycausedbymisuseornotfollowinginstructionsinthemanual.
●Besuretounderstandandfollowallsafetyinstructionscontainedinthemanual.
Besuretoobservetheaboveinstructions.
Failuretofollowtheaboveinstructionsmaycauseinjury,instrumentdamageand/ordamagetoequipmentundertest.
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the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injuryorinstrumentdamage.
DANGER
●Nevermakemeasurementonthecircuitinwhichelectricalpotentialtogroundover300VAC/DCexists.
●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.
●BesuretokeepyourfingersbehindtheFingerbarrierpartoftestlead.
●Neverattempttousetheinstrumentifitssurfaceoryourhandiswet.
●Donotopenthebatterycoverandtheinstrumentcasewhenmaking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turntheFunctionSelectorSwitchwithtestleadsconnectedtotheinstrument.
●Donotinstallsubstitutepartsormakeanymodificationtotheinstrument.
●Donottrytoreplacethebatteriesifthesurfaceoftheinstrumentiswet.
●MakesuretodisconnecttestleadsfromthedeviceundertestwhenopeningtheBatterycoverforbatteryreplacement.
●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.

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CAUTION
●AlwaysmakesuretochecktheFunctionSelectorSwitchissettingtotheappropriaterangebeforestartingmeasurement.
●Donotexposetheinstrumenttothedirectsun,hightemperatureandhumidityordewfall.
●Whentheinstrumentwillnote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.
●Allowablemeasurementtimeat10Arangeofcurrentfunctionis15seconds.Ifyoucarryonmakingmeasurementcontinuouslyover15seconds,itcancause
instrumentdamage.
Pleaserefertofollowingexplanationofthesymbolsmarkedontheinstrumentorinthemanual.
● Symbols
： Ground ：
AC ： DC
： ACandDC Ω：
Resistance
： Diode ：
Buzzer
： Capacitor Hz：
Frequency
F： Doubleorreinforcedinsulation
● Measurementcategory
CAT.Ⅱ： Primaryelectricalcircuitofequipmentwithpowercordforconnectiontooutlet.
CAT.Ⅲ： Primaryelectricalcircuitoftheequipment,whichissuppliedpowerfromadistributionboard,andcablerunfromadistributionboardtoanoutlet.
2.Features
Thisinstrument,KEW1012,isaDigitalMultimeterwhichdesignedformakingmeasurementofthelow-voltageequipment.
(1)Designedtointernationalsafetystandards (6)DiodeandContinuitycheckfunction
IEC61010-1Measurement CAT.Ⅲ300VPollutiondegree2 (7)Auto-rangingfunction
IEC61010-031(Requirementsforthehand-heldprobe) (8)Frequencymeasurementfunction
(2)AccuratetrueRMSreadingsofACcurrentandvoltage (9)DUTYmeasurementfunction
regardlessofthewaveform. (ExpressPulsewidth/Pulseperiodasapercentage)
(3)RELfunctiontocheckthedifferenceofmeasuredvalues (
10 )Currentfunctionisprotectedbyfuse
(4)Autopowerofffunctiontosavebatteryconsumption (
11 )Instrumentisprotectedfrommechanicalshockbyholster
(5)Dataholdfunction
3.Specification
●Measuringrangesandaccuracy(23±5℃,underthe45%〜75%RH)
Function Ranges
ＤＣＶ
600.0mV
6.000V
60.00V
600.0V
600V
0〜600V
(5Autoranging)
±0.5%rdg±2dgt
±0.8%rdg±3dgt
Measuringrange
Overloadprotection:600VDCorAC
rmsImpedance:10MΩ
(Only600.0mVrangeisapprox
100MΩ)
NoteAccuracy

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6.000A
10.00A
600.0μA
6000μA
60.00mA
600.0mA
6.000A
10.00A
600.0Ω
6.000kΩ
60.00kΩ
600.0kΩ
6.000MΩ
60.00MΩ
ＡＣＡ
Resistance
Ω
±1.5%rdg±5dgt(50/60Hz)
±1.8%rdg±5dgt(40〜400Hz)
±1.2%rdg±3dgt(50/60Hz)
±1.5%rdg±3dgt(40〜400Hz)
Overloadprotection:600VDCorAC
rmsImpedance:10MΩ
0.1Vorlessisoutsidetheaccuracy
Crestfactor(CF):3.0orless
Overloadprotection:0.8A/600V
Overloadprotection:10A/600V
Overloadprotection:0.8A/600V
Crestfactor(CF):3.0orless
Overloadprotection:10A/600V
Crestfactor(CF):3.0orless
Overloadprotection:600VDCorACrms.
±1.5%rdg±5dgt(50/60Hz)
±1.8%rdg±5dgt(40〜400Hz)
±1.2%rdg±3dgt
±2.0%rdg±5dgt
±1.5%rdg±4dgt(50/60Hz)
±2.0%rdg±4dgt(40〜1kHz)
Displayreadapproximatelyforwardvoltageofdiode
Built-inbuzzersoundsifresistanceislessthen100Ω
DescriptionRanges
Itcannotdisplaybargraph on diode
range
Overloadprotection:600VDCorACrms.
Note
ForwardDCcurrentapprox.0.4mA
ReversedDCvoltageapprox.2.8V
Opencircuitvoltageapprox.0.5V
Testcondition
Note
Itcan notdisplaybargraphon
capacitancerange
Itcan notdisplaybargraphon
frequencyrange
Overloadprotection:600VDCorACrms
Accuracy
±3.0%rdg±10dgt
±2.5%rdg±5dgt
±5.0%rdg±10dgt
−
±0.1%rdg±5dgt
±2.0％rdg±2dgt
Frequencylowerthen
10kHz Sensitivity:sinewave0.6Vrms
±2.2%rdg±5dgt(50/60Hz)
±2.5%rdg±5dgt(40〜1kHz)
±1.0%rdg±2dgt
±2.0%rdg±3dgt
0〜600V
(4Autoranging)
0〜6000μA
(2Autoranging)
0〜600mA
(2Autoranging)
0〜6000μA
(2Autoranging)
0〜600mA
(2Autoranging)
0〜10A
(2Autoranging)
0〜60MΩ
(6Autoranging)
0〜10A
(2Autoranging)
6.000V
60.00V
600.0V
600V
600.0μA
6000μA
60.00ｍA
600.0ｍA
ＡＣＶ
ＤＣＡ
Function
Capacitance
Frequency
Ranges
40.00nF
400.0nF
4.000μF
40.00μF
400.0μF
4000μF
10Hz
100Hz
1000Hz
10kHz
100kHz
1000kHz
10MHz
DUTY
Measuringrange
0.01nF〜4000μF
(6Autoranging)
1Hz〜10MHz
(7Autoranging)
Inputwhichcanbe
measured:Voltage:
〜1MHz=morethan1.5V
1〜10MHz=morethan2V
0.1〜99.9%
(Pulsewidth/Pulseperiod)

●Standards IEC61010-1MeasurementCAT.Ⅲ300V,pollutiondegree2/MeasurementCAT.Ⅱ600V,pollutiondegree2
IEC61010-031
IEC61326
●Modeofoperation △∑ mode
●Indication LCDmaximumvalue6000(ACV/A,DCV/A,Ω)/maximumvalue9999(Hz)/maximumvalve4000(F),units,symbols
●Overrangedisplay "OL"symbolisdisplayedontheLCD.
"OL"displayedwhenexceedingthemeasuringranges.(exceptforAC/DC600VrangesandAC/DC10Aranges.)
●Auto-ranging Rangeshiftstoupperrangewhenindicatedvalueismorethan6040.
Rangeshiftstolowerrangewhenindicatedvalueislessthan560.
●Samplingrate approx.400ms
●OperatingEnvironmental −indooruse
conditions −altitudeupto2000m
●Temperature&Humidityrange
(guaranteedaccuracy) 23℃±5℃ Relativehumidity:lessthan75%
●OperatingTemperature&
Humidityrange 0℃〜+40℃ Relativehumidity:lessthan80%
●StorageTemperature&
Humidityrange -20℃〜+60℃ Relativehumidity:lessthan90%
●InsulationResistance Itshouldbemorethan100MΩ/DC1000Vbetweenelectricalcircuitandenclosures.
●WithstandVoltage ItshouldbemorethanAC3700V/foroneminutebetweenelectricalcircuitandenclosures.
●OverloadProtection Voltagefunction : 720V(RMS.)10seconds
Resistancefunction : 600V(RMS.)10seconds
Capacitancefunction : 600V(RMS.)10seconds
Frequencyfunction : 600V(RMS.)10seconds
Currentfunction:uA,mA : Protectedby600V0.8Afuse
A:Protectedby600V10Afuse
●Dimensions/Weight approx.161(L)x82(W)x50(D)mm/approx.280g(includingbatteries,holsterinstallation)
●Powersource TwoR6P(AA)1.5Vorequivalent
●Accessories Testlead1set/R6P(AA)2p.c.s/Holster1/Instructionmanual1
●Fuse F600V/800mA(fastactingtype),φ6.3x32mm/F600V/10A(fastactingtype),φ6.3x32mm
CAUTION
●Thevoltageshownaboveistheoverloadprotection(overvoltageprotection)fortheinstrument.Makesurenottoexceedthevalueofvoltageshownabove.
●Inlocationssubjecttoradiofrequencyinterference,theproductmaymalfunctionanditwillrecoverautomaticallyafterthetest.
―15―

―16―
5.Preparation
5-1 CheckingBatteryVoltage
SettheFunctionSelectorSwitchtootherpositionsexcepttheOFFposition.
BatteryVoltageisenoughifindicationisclearand symbolisnotindicatedinthisbout.
If symbolisindicatedornoindicationonthedisplay,followtotheBattery.
Replacementproceduresshowninsection9inthisdocumentandreplacewithnewbatteries.
6.Measurements
6-1VoltageMeasurement(DCV,ACV)
DANGER
●Toavoidthedangerofgettingelectricalshock,nevermakemeasurementonacircuitover600VAC/DC.(electricalpotentialtoground300VAC/DC)
●DonotoperatetheFunctionSelectorSwitchduringmeasurement.
●Donotmakemeasurementwhenopeningthebatterycoverandtheinstrumentcase.
6-1-1DCVoltageMeasurement(DCV)
(1)InserttheblacktestleadplugintotheCOMterminalandtheredtestleadplugintotheVΩHzterminal.
(2)SettheFunctionSelectorSwitchto" "position.(Then,"DC","Auto",and"mV"symbolsareindicatedonthedisplay.)
(3)Connecttheblacktestleadtothenegativesideofthecircuitunderthetestandtheredtestleadtothepositivesideofthecircuit,thenthemeasuredvalue
isindicatedonthedisplay.Ifyouconnectthetestleadstheotherway,"ー"symbolisindicatedonthedisplay.
6-1-2ACVoltageMeasurement(ACV)
(1)InserttheblacktestleadplugintotheCOMterminalandtheredtestleadplugintotheVΩHzterminal.
＋−
＋−
①
③
④
⑤
②
⑪
⑫
⑩
⑨
⑧
⑦
⑬
⑭
⑥
①FunctionSelectorSwitch ②Display
③MIN/MAXKey ④SELECTKey
⑤RANGEKey ⑥RELKey
⑦HOLDKey ⑧Hz/DUTYKey
⑨Measuringterminal(V/Ω/Hz) ⑩Measuringterminal(COM)
⑪Measuringterminal(10A) ⑫Measuringterminal(mA)
⑬TestLeads ⑭
Holster
4.InstrumentLayout

(2)SettheFunctionSelectorSwitchto" "position.(Then,"AC","Auto",and"V"symbolsareindicatedonthedisplay.)
(3)Connectthetestleadstothecircuitundertest.
Measuredvalueisindicatedonthedisplay.
Note)Whenyoumakemeasurementofthevoltagelessthan0.1VattheAC6Vrange,themeasurementvaluecannotbeindicatedcorrectly.
Evenifshort-circuittheinputlineattherangeofAC6V,1〜3dgtmayremainindicated.
Inthatcase,bypressing"REL"Key,"0"willbeindicated.
6-2CurrentMeasurement(DCA/ACA)
DANGER
●Donotapplyvoltagetothecurrentmeasuringterminals.
●Toavoidthedangerofgettingelectricalshock,nevermakemeasurementonacircuitover600VAC/DC.(electricalpotentialtoground300VAC/DC)
●DonotoperatetheFunctionSelectorSwitchduringmeasurement.
●Donotmakemeasurementwhenopeningthebatterycoverandtheinstrumentcase.
6-2-1DCCurrentMeasurement(upto600mA)
(1)InserttheblacktestleadplugintotheCOMterminalandtheredtestleadplugintothemAterminal.
(2)SettheFunctionSelectorSwitchtotheappropriate"uA"or"mA"position.
Incasethat themeasurementcurrentis 6000uAorless, settheFunctionSelectorSwitch to"uA"position,and itis600.0mAor less,settheFunction
SelectorSwitchto"mA"position.(Then,"DC","Auto",and"uA"or"mA"symbolsareindicatedonthedisplay.)
(3)Poweroffthecircuitundertest.
(4)Connecttheblacktestleadtothenegativesideofthecircuitunderthetestandtheredtestleadtothepositivesideofthecircuitsotheinstrumentisinthe
serieswiththecircuit.
(5)Poweronthecircuitundertest.
(6)Measuredvalueisindicatedonthedisplay.
Ifyouconnectthetestleadstheotherpolarity,"ー"symbolisindicatedonthedisplay.
6-2-2DCCurrentMeasurement(upto10A)
CAUTION
●Forsafetysake,themeasuringtimeon10Arangeshouldbe15secondsorless.Intervaltimebetween2measurementsshouldbegreaterthan15minutes.
Ifyoucarryon making measurement continuously over 15 seconds, or make measurement in short interval time, it may cause errorofmeasurementand
instrumentdamage.
(1)InserttheblacktestleadplugintoCOMterminalandtheredtestleadplugintothe10Aterminal.
(2)SettheFunctionSelectorSwitchtothe"A"position.(Then,"DC","Auto",and"A"symbolsareindicatedonthedisplay.)
(3)Poweroffthecircuitundertest.
(4)Connecttheblacktestleadtothenegativesideofthecircuitunderthetestandtheredtestleadtothepositivesideofthecircuitsotheinstrumentisinthe
serieswiththecircuit.
(5)Poweronthecircuitundertest.
(6)Measuredvalueisindicatedonthedisplay.
Ifyouconnectthetestleadstheotherpolarity,"ー"symbolisindicatedonthedisplay.
6-2-3ACCurrentMeasurement(upto600mA)
(1)InserttheblacktestleadplugintotheCOMterminaltheredtestleadplugintothemAterminal.
(2)SettheFunctionSelectorSwitchtotheappropriate"uA"or"mA"position.
Inthecaseofthemeasurementcurrentis6000uAorless,settheFunctionSelectorSwitchto"uA"position,anditis600.0mAorless,settheFunction
SelectorSwitchto"mA"position.(Then,"DC","Auto",and"uA"(or"mA")symbolsareindicatedonthedisplay.)
(3)SettheinstrumenttoACmodebypressing"SELECT"Key.(Then,"AC"symbolisindicatedonthedisplay.)
(4)Poweroffthecircuitundertest.
―17―

(5)Connectthetestleadstothecircuitundertestsotheinstrumentisintheseries.
(6)Poweronthecircuitundertest.
(7)Measuredvalueisindicatedonthedisplay.
6-2-4ACCurrentMeasurement(upto10A)
CAUTION
●Forsafetysake,themeasuringtimeon10Arangeshouldbe15secondsorless.Intervaltimebetween2measurementsshouldbegreaterthan15minutes.
Ifyoucarryon making measurement continuously over 15 seconds, or make measurement in short interval time, it may cause errorofmeasurementand
instrumentdamage.
(1)InserttheblacktestleadplugintotheCOMterminalandtheredtestleadplugintothe10Aterminal.
(2)SettheFunctionSelectorSwitchto"A"position.(Then,"DC","Auto",and"A"symbolsareindicatedonthedisplay.)
(3)SettheinstrumenttoACmodebypressing"SELECT"Key.(Then,"AC"symbolisindicatedonthedisplay.)
(4)Poweroffthecircuitundertest.
(5)Connectthetestleadstothecircuitundertestsotheinstrumentisintheseries.
(6)Poweronthecircuitundertest.
(7)Measuredvalueisindicatedonthedisplay.
6-3ResistanceMeasurement(Ω/Diodecheck/ContinuityCheck)
DANGER
●Toavoidthedangerofgettingelectricalshock,nevermakemeasurementofthecircuitinwhichelectricpotentialexists.
●Donotmakemeasurementwhenopeningthebatterycoverandtheinstrumentcase.
6-3-1ResistanceMeasurement
(1)InserttheblacktestleadplugintotheCOMterminalandtheredtestleadplugintotheVΩHzterminal.
(2)SettheFunctionSelectorSwitchto"Ω"position.(Then,"Auto"and"MΩ"symbolsareindicatedonthedisplay.)
Makesurethatthe"O.L"symbolisindicatedonthedisplayatthisbout,thenshortthetestleadtipsandcheck"0"isindicatedonthedisplay.
(3)Connectthetestleadstobothendsoftheresistanceundertest.
Measuredvalueisindicatedonthedisplay.
Note)Evenifshortthetestleadtips,indicatedvaluemaynotbe"0".Butthisisbecauseoftheresistanceoftestleadsandnotafailure.
Inthatcase,bypressing"REL"key,"0"willbeindicated.
6-3-2DiodeCheck
(1)InserttheblacktestleadplugintotheCOMterminaltheredtestleadplugintotheVΩHzterminal.
(2)SettheFunctionSelectorSwitchto"Ω"position.(Then,"Auto"and"MΩ"symbolsareindicatedonthedisplay.)
(3)Pressthe"SELECT"KeytwiceandsettheinstrumenttoDiodeCheckmode.
(Then," "and"V"symbolsareindicatedonthedisplay.)
Makesurethatthe".OL"symbolisindicatedonthedisplayatthisbout,thenshortthetestleadtipsandcheck"0"isindicatedonthedisplay.
(4)ConnecttheblacktestleadtothecathodesideoftheDiodeandtheredtestleadtotheanodesideoftheDiode.
ForwardvoltageofDiodeisindicatedonthedisplay.
(5)ConnecttheblacktestleadtotheanodesideoftheDiodeandtheredtestleadtothecathodesideoftheDiode.
Normally,".OL"symbolisindicatedonthedisplay.
Conclusion:DiodeisOKiftheinstrumentcomplieswithaboveitems(4)and(5).
Note)Open-circuitvoltagebetweenmeasuringterminalsisapprox.2.8V.(measuringcurrentapprox.0.4mA)
6-3-3ContinuityCheck
(1)InserttheredtestleadplugintotheVΩHzterminalandtheblacktestleadplugintoCOMterminal.
(2)SettheFunctionSelectorSwitchto"Ω"position.(Then,"Auto"and"MΩ"symbolsareindicatedonthedisplay.)
(3)Pressthe"SELECT"KeyonetimeandsettheinstrumenttoContinuityCheckmode.
―18―

(Then," "and"Ω"symbolsareindicatedonthedisplay.)
Makesurethatthe"OL."symbolisindicatedonthedisplayatthisbout,thenshortthetestleadtipsandcheck"0"isindicatedonthedisplayandcheckif
thebuzzerbeeps.
(4)Connectthetestleadstobothendsoftheresistanceundertest.
Measuredvalueisindicatedonthedisplay.Thebuzzerbeepsbelowabout100Ω.
Note)Evenifshortthetestleadtips,indicatedvaluemaynotbe"0".Butthisisbecauseoftheresistanceoftestleadsandnotafailure.Inthatcase,bypressing
"REL"key,"0"willbeindicated.
6-4CapacitanceMeasurement
DANGER
●Toavoidthedangerofgettingelectricalshock,nevermakemeasurementofthecircuitinwhichelectricpotentialexists.
●Donotmakemeasurementwhenopeningthebatterycoverandtheinstrumentcase.
●Makesuretodischargethecapacitorbeforemakingmeasurement.
(1)InserttheblacktestleadplugintotheCOMterminalandtheredtestleadplugintotheVΩHzterminal.
(2)SettheFunctionSelectorSwitchto" "position.(Then,"Auto"and"nF"symbolsareindicatedonthedisplay.)
(3)Pressthe"REL"keyand"0"shallbeindicated.(Then,"△"symbolisindicatedonthedisplay.)
(4)ConnectthetestleadstobothendsoftheCapacitanceundertest.
Measuredvalueisindicatedonthedisplay.
Measuringunit"nF"/"uF"isautomaticallychosenandindicatedduetothemeasuredvalue.
Note)Itmaytakesometimeaccordingtothemeasuringcapacitance.
Measuringcapacitance<4uF----------Measuringtimeisabout2seconds
Measuringcapacitance<40uF----------Measuringtimeisabout7seconds
Measuringcapacitance<100uF----------Measuringtimeisabout15seconds
6-5FrequencyMeasurement
DANGER
●Toavoidthedangerofgettingelectricalshocks,nevermakemeasurementonacircuitover600VAC/DC.(electricalpotentialtoground300VAC/DC)
●DonotoperatetheFunctionSelectorSwitchduringmeasurement.
●Donotmakemeasurementwhenopeningthebatterycoverandtheinstrumentcase.
(1)InserttheblacktestleadplugintoCOMterminalandtheredtestleadplugintotheVΩHzterminal.
(2)SettheFunctionSelectorSwitchto"Hz"position.(Then,"Auto"and"Hz"symbolsareindicatedonthedisplay.)
(3)Connectthetestleadstothecircuitundertest.
Measuredvalueisindicatedonthedisplay.
FrequencycanbemeasuredatACVandACAfunctionsbypressing"Hz/DUTY"key.
Concerningwiththedirectionforuseof"Hz/DUTY"key,pleasereferencetothesection7-6Hz/DUTYinthisdocument.
Note)Theminimuminputcanbemeasuredisapprox.1.5V.
Tomeasureafrequency,measurethevoltageontheelectricalcircuitinadvance.Thenpressthe"Hz/DUTY"keytoenterintofrequencymeasurement.
Readingsoffrequencymayfluctuateorbeinfluencedundernoisyenvironment.
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―20―
7.HowtouseFunctionSwitches
7-1SELECTKey
ThiskeyistochosethemeasuringfunctionatΩ/DiodeCheck/Continuity/functionandCurrentfunction(uA,mA,A).Actionsateachfunctionareasbelow.
●Ω/DiodeCheck/Continuityfunction
Whensettingtheinstrumentto"Ω/DiodeCheck/Continuity"function,"Ω"measuringmodehasbeenselectedintheinitialcondition.Bypressing"SELECT"
Key,measuringmodechanges.
"Ω"→ "ContinuityCheck"→ "DiodeCheck"
●Currentfunction(uA,mA,A)
Whensettingtheinstrumenttoanyfunctionofthe"uA","mA",and"A",DCCurrentMeasuringmodehasbeenselectedintheinitialcondition.
Bypressing"SELECT"Key,measuringmodechanges.
"DC"→ "AC"
7-2MIN/MAXKey
Pressthe"MIN/MAX"KeytolockMAXorMINvalue,andthe"MAX orMIN"signwillappearonthedisplay,pressitover2secondstoexit.
ItcannotdisplaybargraphonMAX/MINHOLDmode.
7-3RANGEKey
Ateach"ACV","DCV","Ω","uA","mA"and"A"function,settingforthemeasuringrangescanbedonemanuallybypressing"RANGE"Key.("Auto"symbol
disappearsfromthedisplay.)
Everytimewhenpressing"RANGE"Key,rangemoves.
InordertochangefrommanualmodetoAuto-ranging,therearefollowing2ways.
1)Press"RANGE"Keyfor2seconds
2)Changetotheotherfunctions.
7-4RELKey
Thedifferencebetweenmeasuredvaluescanbeindicatedonthedisplayateach"ACV","DCV","Ω","Capacitance","ACA"and"DCA"function.
Whenpressing"REL"Key,"△"symbollightsupandthevalueundermeasuringisstored.
Afterthat,thedifferencebetweenstoredvalueandmeasuringvalueisindicatedonthedisplay.
Itcanbereleasedbypressingthe"REL"Keyagain,changingtotheotherfunctions.
Note)Donotpress"REL"Keyover2secondstocausethemalfunction.
Itcanbereleasedagainbypressing"REL"Keyover2seconds.
7-5HOLDKey
Themeasuredvaluecanbeholdatallfunctions.
Bypressing"HOLD"Key,"DH"symbolindicatedonthedisplayandtheindicatedvaluecanbeheld.
Bypressing"HOLD"Keyagain,"DH"symboldisappearsfromthedisplayandhelddataisreleased.
7-6Hz/DUTYKey
MakingmeasurementforfrequencyofinputsignalandDUTY(Pulsewidth/Pulseperiod).
(1)Changefromnormalmeasurementto"FrequencyMeasurement"and"DUTYMeasurement".
Everytimewhenpressing"Hz/DUTY"Key,itchangesinthefollowingsequencefromnormalmeasurement.
"Frequency"→ "DUTY"→ "Normalmeasurement"
(2)ChangeFrequencyandDUTYat"Hz/DUTY"function.
Bypressing"Hz/DUTY"Key,itchangesinthesequence:"Frequency"→ "DUTY".

―21―
8.AutoPowerOff
Autopowerofffunctionoperateswhenabout15minutespassedafterpoweronthisinstrument.
WhenAutopowerofffunctionoperatesandtheinstrumentpoweredoff,thepower-offstatuereturnstonormalbypressinganykey.
AnditispossibletoreleasetheAutopowerofffunction.
TurntheFunctionSelectorSwitchfromOFFpositiontothefunctionyouwantwithpressing"SELECT"Key,andpowerontheinstrument.
9.Battery&FuseReplacement
DANGER
●Neveropenthebatterycoverandtheinstrumentcasewhenmakingmeasurement.
●Toavoidgettingelectricalshock,besuretoremovetestleadsfromtheinstrumentwhenopeningthebatterycoverinordertoreplacebatteriesandfuses.
9-1Batteryreplacement
(1)Removetestleadsfromtheinstrument.
(2)Removetheholsterfromtheinstrument.
(3)LoosenonescrewonthebottomoftheInstrumentandopenthebattery
coverthenreplacebatteries.
9-2Fusereplacement
(1)Removetestleadsfromtheinstrument.
(2)Removetheholsterfromtheinstrument.
(3)Loosentwoscrewsonthebottomoftheinstrumentandopenthebattery
cover,thenreplacefuses.
10.Maintenance
Useaclothdippedinwaterorneutraldetergentforcleaningtheinstrument.Donotuseabrasivesorsolvents.
Fuse:F600V/10A(Fastactiontype)φ6.3x32mm
F600V/800mA(Fastactiontype)φ6.3x32mm
Screw
Screw
Battery:TwoR6P(AA)1.5Vorequivalent

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92‑1825C
KEW 1012 製造番号
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