Extech Instruments MA61 Manuale utente

USERGUIDE

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TrueRMSMiniClampMeters

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MA6160AACClampMeter

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MA6360AAC/DCClampMeter

MA61_MA63-en-GB_V1.0 3/15

Introduction

ThankyouforselectingtheExtechInstrumentsTrueRMSMiniClampMeter.TheMA61

measuresACCurrentwhiletheMA63measuresACandDCCurrent.Bothmetersalsomeasure

AC/DCVoltage,Frequency,Resistance,Capacitance,Diode,andContinuity.

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TheMiniClampMetersmeasurecurrentinthreeACranges600mA,6000mA,and60A.The

MA63onlymeasuresDCcurrentintworanges6000mADCand60ADC.

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TheclampmetersofferadvancedfeaturesthatincludesNCV(non‐contactvoltage)detection

andVFC(variablefrequencycontrol)thatinsertsalowpassfilterinthemeasurementcircuit.

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Thisdeviceisshippedfullytestedandcalibratedand,withproperuse,willprovideyearsof

reliableservice.Pleasevisitourwebsite(www.extech.com)tocheckforthelatestversionofthis

UserGuide,ProductUpdates,ProductRegistration,andCustomerSupport.

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Features

•TrueRMSforaccuratereadingsofnoisy,distorted,ornon‐sinusoidalwaveforms

•ModelMA61forACCurrent,AC/DCVoltageMeasurements,andRelativefunction

ModelMA63forAC/DCCurrent/VoltageMeasurements,andZerofunction

Frequency,Resistance,andCapacitanceMeasurements

•Compact0.7"(17mm)jawsizeaccommodatesconductorsupto300MCM

•VariableFrequencyControl(VFC):Lowpassfilterforaccuratemeasurementofvariable

frequencydrivesignalsbyfilteringhigh‐frequencyinterference.

•Built‐inNon‐ContactVoltage(NCV)detector

•Fullrangeoverloadprotection

•6000countbacklitLCDdisplay

•DataHoldfreezesreadingondisplay

•LowbatteryindicatorandAutoPowerOfffeaturewithdisable

•CATII‐600VCATIII‐300Vsafetyrating

•Completewithtestleads,carryingcase,andtwoAAAbatteries

MA61_MA63-en-GB_V1.0 3/15

Safety

TheproductdesignmeetsIEC/EN61010‐1andEN61010‐2‐033.PleasereadtheUserGuide

beforeuseandcomplywithallsafetyinstructions.

ThisproductconformstoULStandards61010‐1,61010‐2‐030,61010‐2‐032,61010‐2‐033andis

CertifiedtoCSAstandardsC22.2no.61010‐1,61010‐2‐030andIECstandards61010‐2‐032and

61010‐2‐033.

SafetyNotices

1. PleaseusetheclampmeteraccordingtothisUserGuideotherwisethebuilt‐inprotections

maybecompromised.

2. Pleasecomplywithwithnationalsafetyregulationswithregardtowearingpersonal

protectiveattireandgeartoavoidinjurayanddamagecausedbyarcdischargingincases

wheretheliveconductorisexposed.

3. Donotallowthefingersorthehandabovetheprotectivefingerguardwhiletesting.

4. Pleasechecktheclampmeterhousing,buttons,switches,andinsulatedwiresforcracksor

otherdamagebeforeeachuse.Serviceorreplaceifnecessary.

5. Pleaseremovetheclampmeterfromalllivecircuitsanddisconnectthetestleadsbefore

removingtherearbatterycompartmentcover.

6. Pleasedonotusetheclampmetertomeasuressignalsgreaterthan600Vorfrequencies

higherthan400Hz.

7. Over‐voltagelevel:CATII600V;CATIII300V,pollutionclass2.

8. Workingnearexposedconductorsmustbedonesousingthehighestcaution.Such

conductorspresentalethalelectricshockhazard.

9. Usecautionmeasuringvoltageequaltoorgreaterthan60VDC,30VACor42VAC(peak)as

thesepresenttheriskofelectricshock.

10. Thisdevicehasamaximummeasurementvoltagelimitof600Vandthesafetystandard

complieswithCE/ETLcertification(EN61010‐1,EN61010‐2‐033,andEN61010‐2‐032).

InternationalSafetySymbols

MA61_MA63-en-GB_V1.0 3/15

MeterDescription

1. ClampJaws

2. MeasuredConductor

3. NCVNon‐ContactVoltageDetectorlamp

4. FunctionSelectSwitch

5. MODEButton

6. LCDDisplay

7. COMInputTestLeadTerminal

8. PositiveInputTestLeadTerminal

9. REL(Relative)buttononMA61;ZERObuttononMA63

10. DisplayHold/backlightbutton

11. Jawtriggeropen/closecontrol

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Fig‐1MeterParts

23 4 5 6

910

ControlButtonsDescription

ButtonDescription

PressandholdtoselectVFC(variablefrequencycontrol,lowpassfilter)

MA63only:ShortpresstoselectDC,ACorFrequency(Hz)

MA63only;PresstoaccesstheZEROmode

MA61only;PresstoaccesstheRelativemode

Shortpresstofreeze/unfreezethedisplayedreading

PressandholdtotogglethebacklightON‐OFF

MA61_MA63-en-GB_V1.0 3/15

Function Switch Description

MODELMA61

1. NCV:Non‐ContactVoltageDetector

2. 60AACMeasurements

3. 600mAACMeasurements

4. 6000mAACMeasurements

5. Resistance,Diode,Continuity,andCapacitanceMeasurements

6. ACorDCVoltageandFrequencyMeasurement

7. POWEROFFselection

8. FunctionSelectorDial

MODELMA63

9. NCV:Non‐ContactVoltageDetector

10. 60AACwithFrequencyorDCMeasurements

11. 600mAACwithFrequencyorDCMeasurements

12. 6000mAACwithFrequencyorDCMeasurements

13. Resistance,Diode,Continuity,andCapacitanceMeasurements

14. ACorDCVoltageandFrequencyMeasurements

15. POWEROFFselection

16. FunctionSelectorDial

Fig‐2FunctionSwitch

15 16

Model MA61 Model MA63

MA61_MA63-en-GB_V1.0 3/15

Display Icon Descriptions

LowBattery

TrmsTrueRMSmeasurement

DCDirectcurrent

ACAlternatingcurrent

AUTOAutomaticrange

‐ Minussign;negativereading

)))AudibleContinuitymode

Diodetest

HDisplayhold

AutoPowerOFF(APO)icon(switchesoffwhenAPOisdisabled)

ZERO/RELZero(MA63)andRelative(MA61)functions

VFCVariableFrequencyControl(lowpassfilter)forACVoltage/Current

EFNCV(Non‐ContactVoltage)Detector(EF:ElectromotiveForce)

mA,AAmpere:Unitofcurrent

mV,VVolt:Unitofvoltage

Ω,kΩ,MΩOhm:Unitofresistance

F,µF,nF Farad:Unitofcapacitance

O.LOver‐rangemeasurement

Measurementunitprefixes

m(milli‐)10‐3

µ(micro‐)10‐6

n(nano‐)10‐9

k(kilo‐)103

M(mega‐)106

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MA61_MA63-en-GB_V1.0 3/15

Operation

MeterPower

Caution:Donotusethemeterwithbatterycompartmentopenorunsecured.

Theclampmeterispoweredbytwo(2)AAAbatteries.Thebatterycompartmentislocatedonthe

backofthemeter.ThebatterycompartmentissecuredbyonePhillipsheadscrew.Refertothe

BatteryReplacementsectionlaterinthisguideformoreinformation.

AutomaticPowerOFF(APO)

Themeterautomaticallyswitchesoffafter15minutesofinactivity.Beforeswitchingoff,themeter

beepsseveraltimestoalerttheuser.TodisableAPO,holddowntheMODEbuttonwhilepowering

upthemeter.Themeterwillbeepfive(5)timesindicatingthatAPOisdisabled;releasethebutton.

NotethattheAPOiconisnotvisibleonthedisplaywhenAPOisdisabled.APOisre‐enabledon

thenextcyclingofmeterpower.

CurrentMeasurements‐ClampingTechnique

Clamparoundonlyoneconductor.RefertoFig‐3below.Thediagramatleftiscorrectandthe

diagramatrightisincorrect.

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Fig‐3CorrectandIncorrectClampingTechniques

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ACCurrentMeasurements

WARNING:Toavoidelectricshock,disconnectthetestleadsfromthemeterbeforemaking

currentmeasurements.

CAUTION:ObserveCATII600V,CATIII300VwithrespecttoEarthGroundfortheJaw.

1. SettheFunctionswitchtothe600mA,6000mA,or60Arange.

2. FortheMA63,shortpresstheMODEbuttontoSelectAC,Frequency(orDC)

3. PresstheTriggertoopentheclampjaw.

4. Clampontoasingleconductor(fullyenclosingit).Donotallowagapbetweenthetwohalves

ofthejaw.RefertoFig‐3earlierintheOperationsection.

5. Whenmeasuringvariablefrequencydevices,pressandholdtheVFCbuttontostart/stop

measuringwiththelowpassfilter.

6. ReadtheACAvalueontheLCD.

DCCurrentMeasurements(MA63only)

WARNING:Toavoidelectricshock,disconnectthetestleadsfromthemeterbeforemaking

currentmeasurements.

CAUTION:ObserveCATII600V,CATIII300VwithrespecttoEarthGroundfortheJaw.

1. SettheFunctionswitchtothe600mA,

6000mA,or60Arange.

2. UsetheMODEbuttontoselectDC.

3. PresstheZERObuttonseveraltimestonull

themeterdisplaywithoutaconductorin

theclampjaw.Zerothemeterwiththe

clampheldinthesameorientationasthe

actualmeasurement(seeFig‐4).

4. PresstheTriggertoopenthecurrentsense

Jaw.

7. Fullyencloseasingleconductor.Donot

allowagapbetweenthetwohalvesofthe

jaw.RefertoFig‐3earlierinthisguide.

5. ReadtheDCAvalueontheLCD.



Fig‐4CorrectandIncorrectZERO

techniques

ZERO

MA61_MA63-en-GB_V1.0 3/15

FrequencyMeasurements

WARNING:Toavoidelectricshock,disconnectthetestleadsfromthemeterbeforemaking

currentmeasurements.

CAUTION:ObserveCATII600V,CATIII300VwithrespecttoEarthGroundfortheJaw.

1. SettheFunctionswitchtotheHzposition.

2. PresstheTriggertoopenthejawandfullyencloseoneconductor.RefertotheFig‐3inthe

CurrentClamptechniquesectionabove.

3. ReadtheFrequencymeasurementontheLCDinHz.

VoltageMeasurements

WARNING:Donotapply>600VAC/DCbetweenthemeter’sterminalsandearthground

CAUTION:Whenconnectingthetestleadstothecircuitordeviceundertest,connectthe

blackleadbeforethered;whenremovingthetestleads,removetheredbeforetheblacklead.

ACVoltageMeasurements

1. Inserttheblacktestleadbananaplugintothenegative

(COM)jackandtheredtestleadbananaplugintothe

positive(V/Ω)jack.

2. TurnthefunctionswitchtotheVposition.

3. UsetheMODEbuttontoselectACifnecessary.Usethe

MODEbuttontoalsoselectthefrequencyofthemeasured

voltage.

4. Touchthetestprobetipstothecircuitundertest.

5. Readthevalueinthedisplay.Thedisplaywillindicatethe

properdecimalpoint.



Fig‐5ACVOLTAGEMEASUREMENT

MA61_MA63-en-GB_V1.0 3/15

DCVoltageMeasurements

1. Inserttheblacktestleadbananaplugintothenegative(COM)jackandtheredtestlead

bananaplugintothepositive(V/Ω)jack.

2. MovetheFunctionSwitchtotheVposition.

3. PresstheMODEbuttontoselectDCifnecessary.

4. Touchthetestprobetipstothecircuitundertest.Besureto

observethecorrectpolarity(redleadtopositive,blackleadto

negative).

5. Readthevoltageinthedisplay.Thedisplaywillindicatethe

properdecimalpointandvalue.Ifthepolarityisreversed,the

displaywillshow(‐)minusbeforethevalue.

6. ThemeteriscapableofdetectingDCvoltagesto600V.

7. Whenvoltageismeasured,theNCVvoltagedetectLEDwillbe

lit.



Fig‐6DCVOLTAGEMEASUREMENT



ResistanceMeasurements

Cautions:SwitchOFFpowertothedeviceundertestbeforemeasuring.Donottestoncircuits

ordeviceswhere60VDCor30VACispresent.

1. Inserttheblacktestleadbananaplugintothenegative

(COM)jack.Inserttheredtestleadbananaplugintothe

positive(V/Ω)jack.

2. TurntheFunctionSwitchtotheΩposition.

3. UsetheMODEbuttontoselecttheΩicononthedisplay

indicatingresistanceonly(withouttheaudiblecontinuity

iconshowing).

4. Touchthetestprobetipsacrossthecircuitorpartunder

test.Itisbesttodisconnectonesideofthepartundertest

sotherestofthecircuitwillnotinterferewiththe

resistancereading.

5. Readtheresistanceinthedisplay.Thedisplaywillindicate

theproperdecimalpointandvalue.



Fig‐7RESISTANCEMEASUREMENT

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