Extech Instruments MA160 Manual de usuario

USERGUIDE

TrueRMS200AAC/DCOpenJawClampMeter

ModelMA160



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TableofContents

1.INTRODUCTION3

2.SAFETYINFORMATION4

3.DESCRIPTIONS6

4.OPERATION9

PoweringtheMeter9

DisplayBacklight9

WorkLight9

DataHold9

TestLeadConsiderations9

VoltageMeasurements10

ACVoltageMeasurements10

DCVoltageMeasurements11

CurrentMeasurementsUsingtheClamp12

Non‐ContactVoltageDetector13

ResistanceMeasurements14

ContinuityMeasurements15

CapacitanceMeasurements16

DiodeTest17

5.MAINTENANCE18

6.SPECIFICATIONS19

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1. Introduction

ThankyouforselectingtheExtechMA160ClampMeter.

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TheMA160isafeature‐packedOpenJawTrueRMSdigitalClampmeter.



MeasureAC/DCvoltage,ACcurrent,DCcurrent,Resistance,Diode,Continuity,andCapacitance.

TheMA160alsoincludesaNon‐ContactVoltageDetectionfeature.

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OtherfunctionsincludeDataHold,Relativemode,Worklight,Backlight,andAutopower‐off.



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.



Features

6000countdigitaldisplay

LargebacklitLEDdisplay

TrueRMSACmeasurements

0.8%DCVaccuracy

DataHold

Relativemode

AutoPowerOFF(APO)

200AACcurrentmeasurements

200ADCCurrentMeasurements

Non‐ContactVoltageDetector

Visualandaudiblecontinuitymeasurementalert

Lowbatteryindicator

CATIII600V/CATII1000V



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2. SafetyInformation

Toensurethesafeoperationandserviceofthemeter,followtheseinstructionsclosely.Failureto

observewarningscanresultinsevereinjury.

WARNINGS

WARNINGSidentifyhazardousconditionsandactionsthatcouldcauseBODILYHARMorDEATH.

Whenhandlingtestleadsorprobes,keephandsandfingersbehindthefingerguardsatalltimes.To

avoidelectricalshockdonottouchexposedelectricalwire,connectors,unusedinputterminals,or

circuitsundertest.

Removetestleadsfromthemeterbeforeopeningthebatterycompartmentormeterhousing.

UsethemeteronlyasspecifiedinthisUserGuideoraccompanyingQuickStarttoavoidcompromising

theprotectionsprovidedbythemeter.

Besuretousetheproperterminals,switchpositions,andrangeswhentakingmeasurements.

Verifythemeter’soperationbymeasuringaknownvoltage.Havethemeterservicedifthemeter

respondsunusuallyoriftherearequestionsregardingthemeter’sfunctionalintegrity.

Donotapplymorethantheratedvoltage,asmarkedonthemeter,betweenterminalsorbetweenany

terminalandearthground.

Donotmeasurevoltagesabove1000VDCor600VACbetweenterminalandgroundtopreventelectrical

shockanddamagetotheClampmeter.

Usecautionworkingwithvoltagesabove30VACRMS,42VACpeak,or60VDC.Thesevoltagesposea

shockhazard.

Toavoidmisleadingreadingsthatcouldleadtoelectricshockandinjury,replacethebatteriesassoonas

thelowbatteryindicatorisdisplayed.

Disconnectpowertothecircuitundertestanddischargeallhigh‐voltagecapacitorsbeforetesting

resistance,continuity,diodes,orcapacitance.

Donotusethemeterinthepresenceofexplosivegasorvapor.

Toreduceriskoffireorelectricshock,donotusethemeterifitiswetanddonotexposethemeterto

moisture.

IndividualprotectiveequipmentshouldbeusedifHAZARDOUSLIVEpartsintheinstallationwhere

measurementsaretobecarriedoutcouldbeaccessible.



CAUTIONS

CAUTIONSidentifyconditionsandactionsthatcouldcauseDAMAGEtothemeterorequipment

undertest.Donotexposethemetertoextremesintemperatureorhighhumidity.

Disconnectthetestleadsfromthetestpointsbeforechangingthepositionofthefunction(rotary)

switch.

Donotexposethemetertoextremesintemperatureortohighhumidity.

Neversetthemetertotheresistance,diode,capacitance,micro‐amp,orampfunctionswhen

measuringthevoltageofapowersupplycircuit;thiscouldresultinmeterdamageanddamagetothe

equipmentundertest.

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SafetySymbolsthataretypicallymarkedonmetersandinstructions

Thissymbol,adjacenttoanothersymbol,indicatestheusermustrefertothe

manualoruserguideforfurtherinformation.

Riskofelectricalshock

Equipmentprotectedbydoubleorreinforcedinsulation



LowBatterysymbol

ConformstoEUdirectives

Donotdiscardthisproductinhouseholdtrash.

ACmeasurement

DCmeasurement

Earthground



PERIEC1010OVERVOLTAGEINSTALLATIONCATEGORY

OVERVOLTAGECATEGORYI

EquipmentofOVERVOLTAGECATEGORYIisequipmentforconnectiontocircuitsinwhichmeasuresare

takentolimitthetransientover‐voltagestoanappropriatelowlevel.

Note–Examplesincludeprotectedelectroniccircuits.

OVERVOLTAGECATEGORYII

EquipmentofOVERVOLTAGECATEGORYIIisenergy‐consumingequipmenttobesuppliedfromthefixed

installation.

Note–Examplesincludehousehold,office,andlaboratoryappliances.

OVERVOLTAGECATEGORYIII

EquipmentofOVERVOLTAGECATEGORYIIIisequipmentinfixedinstallations.

Note–Examplesincludeswitchesinthefixedinstallationandsomeequipmentforindustrialusewith

permanentconnectiontothefixedinstallation.

OVERVOLTAGECATEGORYIV

EquipmentofOVERVOLTAGECATEGORYIVisforuseattheoriginoftheinstallation.

Note–Examplesincludeelectricitymetersandprimaryover‐currentprotectionequipment

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3. Descriptions

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MeterDescription

1. Non‐ContactVoltageDetector

2. Openjaw

3. WorkLight

4. NCValertLEDlamp

5. WorkLightswitch

6. Rotaryfunctionswitch

7. Mode(M)button

8. Relative,DCAZerobutton

9. HOLDandBacklightbutton

10. Display

11. Testleadjacks

Note:Batterycompartmentonbackofmeter



Fig3‐1METERDESCRIPTION

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DisplayIconDescriptionsforMA160

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Fig3‐2MA160METERDISPLAY

1. Unitsofmeasure

2. DCAZero

3. Relativemode

4. Datahold

5. AlternatingCurrent

6. DirectCurrent

7. Automaticrange

8. Continuity

9. Diode

10. Capacitance

11. Non‐ContactVoltageDetector

12. Autopoweroff

13. Batterystatus

14. LCDdisplay



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Push‐ButtonDescriptions

MomentarypressesoftheMode(M)buttonperformthefunctionsshowninthetable

below.



Fig.3‐4Mode(M)ButtonFunctionTable

SwitchPositionMode(M)ButtonFunction

ACDC



AC DC

Ω   

Momentarilypresstoaccess/exittheRelativemode.Thismodeofoperationisonly

availableforAC/DCvoltage,ACCurrent,andCapacitance.

InDCAmode,presstozerothedisplay;pressandholdtoexitthezero.

Pressandholdthisbuttontoactivate/deactivatetheLCDbacklight.Momentary

pressesswitchDATAHOLDONorOFF.

FunctionSwitchDescription

1. MeterPOWEROFFposition

2. AC/DCCurrentmode(useMbuttontochooseACorDC)

3. AC/DCVoltagemode(useMbuttontochooseACorDC)

4. Capacitance,Continuity,Diode,Resistancemodes

(useMbuttontochoosemode)

5. Non‐ContactVoltageDetectpositionwithalertLED



Fig3‐3MA160FunctionSwitch

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4. Operation

CAUTION:ReadandunderstandalloftheSafetystatementslistedinthesafetysection

ofthismanualpriortouse.

PoweringtheMeter

1. Turntherotaryfunctionswitchtoanypositiontopowerthemeter.Checkthebatteriesifthe

unitfailstopowerON.RefertotheMaintenancesectionforbatteryreplacement.

2. TurnthefunctionswitchtotheOFFpositiontopowerOFFthemeter.

3. ThemeterhasanAutoPowerOFFfeature(APO)wherethemeterswitchesOFFafter15

minutesofinactivity.WhenAPOisenabled,theAPOiconwillshowonthedisplaywhenthe

meterispoweredON,

Thelowbatterysymbolappearsonthedisplaywhenthebatteryvoltageweakensbelowthe

threshold.

DisplayBacklight

WiththemeterpoweredON,pressandholdthebacklightbuttontoswitchthebacklightONor

OFF.Notethatexcessiveuseofthebacklightwillshortenthebatterylife.

WorkLight

WiththemeterpoweredON,presstheWorkLightbuttonontherightsideofthemeter.A

momentarypresswillswitchtheWorkLightoff.TheWorkLightlampislocatedonthebackofthe

unittowardthebottomoftheclampjaw.Notethatexcessiveuseofthebacklightwillshortenthe

batterylife.

DataHold

TofreezetheLCDmeterreading,presstheDataHold(H)button.Whiledataholdisactive,theH

displayiconappearsontheLCD.Pressthe(H)buttontoreturntonormaloperation.TheHiconwill

switchOFF.

TestLeadConsiderations

TestleadprobecoverscanberemovedforCATII1000Vinstallations.Usethetestleadprobe

coversforCATIII1000Vinstallations.Donotmeasurevoltages>1000VDCor600VAC.Remove

thestoragecapsfromthemeterendoftestleadsbeforeconnectingleadstothemeter.

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VoltageMeasurements

WARNING:

RemovethetestleadprobecoversforCATII1000Vinstallations.Usethetestleadprobecovers

forCATIII600Vinstallations.

Donotmeasurevoltagesgreaterthan600VACor1000VDC.

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.

Disconnectprobesandcircuitundertestafterallmeasurementsarecompleted.

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position.UsetheMbuttontoselectAC.

3. ReadtheWarningandCautionstatementsabovetodeterminewhetherornottousethe

testleadprobecovers.

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

5. Readthedigitalvalueshownonthedisplay.ThemeterisAutoRangingandtherefore

selectstheproperdecimalpointposition.Themeteralsodisplaysthemeasurement

type,unitsymbols,andotherrelevantmultifunctionicons.

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



Fig4‐1ACVOLTAGEMEASUREMENTS

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