Extech Instruments MA145 Manuel utilisateur

USERGUIDE

TrueRMS300AAC/DCMiniClampMeterwith

Non‐ContactVoltageDetector

ModelMA145

www.GlobalTestSupply.com

Find Quality Products Online at: sales@GlobalTestSupply.com

MA145‐en‐GB_V1.15/15

Introduction

ThankyouforselectingtheExtechMA145300AAC/DCTrueRMSMiniClampMeterwithNon‐

ContactVoltageDetector.TheMA145issmallinsizebutruggedinperformance.



TheMA145measuresAC/DCcurrentto300AandoffersaSmartDataHoldfeature,display

Backlight,In‐rushCurrentmode,DCAZero,LowPassFiltering(LPF),andanon‐contactVoltage

Detectionfeaturethatsenseselectricalsourcessafely.



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.

SafetyInformation–PleaseReadFirst

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.

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

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

Iftheequipmentisusedinamannernotspecifiedbythemanufacturer,theprotectionprovidedbythe

equipmentmaybeimpaired.

Toreducetheriskoffireorelectricshock,donotexposethisproducttorainormoisture.

Verifythemeteroperationbymeasuringaknownvoltage.Ifindoubt,havethemeterserviced.

Donotapplymorethantheratedvoltageasmarkedonthemeter.

Toavoidfalsereadingsthatcanleadtoelectricshockandinjury,replacebatteryassoonasthelow

batteryindicatorappears.

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

Pleasekeepfingersandhandsbehindthefingerguards.

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

De‐energizetheinstallationundertestorwearsuitableprotectiveclothingwhenplacingorremoving

thecurrentclampfromatestsetup.

Donotapply/removethecurrentclampto/fromUNINSULATEDHAZARDOUSLIVEconductorswhichmay

causeelectricshock,electricburn,orarcflash.



www.GlobalTestSupply.com

Find Quality Products Online at: sales@GlobalTestSupply.com

MA145‐en‐GB_V1.15/15

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.

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

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

manualforfurtherinformation.

Riskofelectricalshock

DonotapplyorremoveclampfromHAZARDOUSLIVEconductors

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

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OVERVOLTAGE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

www.GlobalTestSupply.com

Find Quality Products Online at: sales@GlobalTestSupply.com

MA145‐en‐GB_V1.15/15

123 45

Description



MeterDescription

1. Transformercurrentjaw

2. Finger‐HandGuard

3. Jawopeningtrigger

4. LCDMulti‐functiondisplay

5. Push‐buttoncontrols



Notethatthebatterycompartmentislocatedonbackofmeter



DisplayDescription

1. AutomaticACA/DCAdetect

2. Zeroicon

3. In‐RushCurrentmode

4. LowPassFilter

5. DataHold

6. ACMeasurement

7. DCMeasurement

8. Amperes(current)

9. MainDisplayarea

10. Batterystatusicon

11. Minus(negative)sign

12. Non‐ContactVoltDetecticons

ControlButtonDescription

Pressfor>2secondstoaccessIn‐rushCurrentmode

PresstoaccessLowPassFiltermode

Presstoaccesscurrentmeasurementmode.PressagaintotoggleAC/DC

PresstoaccessVoltagedetectmode

Pressfor>2secondstozeroDCAdisplay

PresstoswitchDataHoldonoroff

PresstopowerONthemeter.Pressandhold>2secondstoswitchOFF

Presstotoggledisplaybacklightonandoff

www.GlobalTestSupply.com

Find Quality Products Online at: sales@GlobalTestSupply.com

MA145‐en‐GB_V1.15/15

Operation

CAUTIONS



ReadandunderstandalloftheSafetystatementslistedinthesafetysectionofthismanual

priortouse.

PoweringtheMeter

1. PressthePower‐Backlightbuttontopowerthemeter.Checkthebatteriesiftheunitfailsto

powerON.

2. PressandholdthePowerbuttonformorethan2secondstopowerOFFthemeter.

3. ThemeterhasanAutoPowerOFFfeature(APO)wherethemeterswitchesOFFafter20

minutesofinactivity.TodisableAPO,refertothenextsection.

Note:Themeterdisplaysthebatterycapacitywhenpoweringup.

DisableAutoPowerOFF

ThemeterwillautopowerOFFafter20minutesofinactivity.Todefeatthisfeature,followthe

stepsbelow.

1. WiththemeterOFF,pressandholdthe‘V’buttonand,whilecontinuingtoholdthe‘V’

button,pressthepowerbutton.

2. ThedisplaywillshowAOFF.

3. Releaseallofthebuttons.

4. TheAutoPowerOFFfunctionwillnowbedisableduntilthenextcycleofpower.

DisplayBacklight

WiththemeterpoweredON,pressthebacklightbuttontoswitchthebacklightONorOFF.Note

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

www.GlobalTestSupply.com

Find Quality Products Online at: sales@GlobalTestSupply.com

MA145‐en‐GB_V1.15/15

AC/DCCurrentMeasurements

WARNING:Donothandlethemeterabovethefinger/handguardbarrier.

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

1. Pressthe‘A’buttontoaccesstheCurrentmeasurementmode.TheAsymbolwillappearon

thedisplayinthelowerrighthandsideindicatingAmperes(Amps).

2. ThemetercanbeusedinAUTOmode(default)wherethemeterdetectsACorDCcurrent

automaticallyorthemetercanbeusedmanually(usethe‘A’buttontotoggleDCandAC).

3. WheninAUTOmode,thedisplayshowstheAUTOiconintheupperleftcorner.

4. ThemeterdisplaywillshowACorDContherightsideofthedisplay.

5. WheninDCCurrentmode,pressandholdZEROfor>2secondstonullthedisplaybefore

takingaDCAmeasurement.

6. Pressthejawtriggertoopentheclampjaw.

7. Positiontheclamparoundonlyoneconductor.Seeaccompanyingdiagramsforcorrectand

incorrectuse.

8. Readthecurrentinthedisplay.Thedisplaywillindicatetheproperdecimalpointandvalue.

InDC,Ifthepolarityisreversed,thedisplaywillshow(‐)minusbeforethevalue.



www.GlobalTestSupply.com

Find Quality Products Online at: sales@GlobalTestSupply.com

MA145‐en‐GB_V1.15/15

InrushCurrentMode

IntheInrushmodethemeterwaitsuntilatleast5Aisdetectedandthenstartsa100mssample

windowinwhichtocaptureaninrushcurrentRMSvalue.Refertoillustrationbelow.

1. PressandholdtheINRUSHbuttonfor>2secondstoaccesstheInrushCurrentmode.

2. ThedisplaywillshowtheINRUSHicon.

3. Whenready,takeacurrentmeasurement.Themeterwillcapturethehighestreading

detectedduringa100mswindow.Notethatthe100mswindowdoesnotopenuntilatleast

5Aisdetected.

4. ToexittheInrushCurrentmodepresstheINRUSHbuttonagainmomentarily.TheINRUSH

iconwillswitchOFF.

TIME

CURRENT

Start Stop

Current

Detection

Threshold

Measured Inrush

Current

100ms Sample Window (60Hz)



LowPassFilter

TheLowPassFiltermodeoffershighfrequencyrejectionwhenmeasuringVariableSpeedDrives.

TheLowPassFiltermodeoffersacut‐offfrequencyof160Hz(approx.)withanattenuation

characteristicof‐24dbperoctave(approx.).

1. MomentarilypresstheLPFbuttontoaccesstheLPFmode

2. TheLPFdisplayiconisshownonthedisplayintheLPFmode

3. PresstheLPFbuttonagaintoexittheLPFmode,theLPFiconwillswitchOFF



www.GlobalTestSupply.com

Find Quality Products Online at: sales@GlobalTestSupply.com

MA145‐en‐GB_V1.15/15

Non‐ContactVoltageDetectionFeature

Themeter’saudiblebeepertriggersandthedisplayshows

dasheswhenthemetersensesanelectricalvoltagefield.The

highertheelectricalfieldstrengththegreaterthenumberof

dashesdisplayedandthefastertherateoftheaudiblebeeps.

Ifthemeterdoesnotemitatoneordisplaydashesinthismode,

thereisstillthepossibilitythatvoltageispresent.Pleaseuse

caution.

1. Pressthe‘V’buttontoaccesstheNon‐ContactVoltage

Detectmode.

2. Notethevoltagedetectiondisplayiconsasshowninthe

Descriptionsectionofthisguide.

3. Placethemeternearasourceofelectricalenergy.Thetip

oftheclampoffersthehighestsensitivity.

4. Notetheaudiblebeepingandthedashdisplays.

SmartDataHold

TofreezetheLCDmeterreading,presstheHOLDbutton.Whiledataholdisactive,theHOLD

displayiconappearsontheLCD.PresstheHOLDbuttontoreturntonormaloperation.The

HOLDiconwillswitchOFF.

Themeter’sbeeperwillsoundandtheLCDwillflashifthedetectedsignalis50countsgreater

thantheheldreading.



www.GlobalTestSupply.com

Find Quality Products Online at: sales@GlobalTestSupply.com

MA145‐en‐GB_V1.15/15

Maintenance

WARNING:Toavoidelectricalshock,disconnectthemeterfromanycircuitandturnOFF

themeterbeforeopeningthecase.Donotoperatewithanopencase.

CleaningandStorage

Periodicallywipethecasewithadampclothandmilddetergent;donotuseabrasivesorsolvents.

Ifthemeterisnottobeusedfor60daysormore,removethebatteriesandstorethemseparately.

BatteryReplacement

1. RemovethePhillipsheadscrewatthelowerbackofthemeter.

2. Openthebatterycompartment

3. ReplacethetwoLR44batteriesobservingcorrectpolarity.

4. Re‐assemblethemeterbeforeuse

5. Safety:Pleasedisposeofbatteriesresponsibly;neverdisposeofbatteriesinafire,batteries

mayexplodeorleak;nevermixbatterytypes,installnewbatteriesofthesametype.



Neverdisposeofusedbatteriesorrechargeablebatteriesinhouseholdwaste.

Asconsumers,usersarelegallyrequiredtotakeusedbatteriestoappropriate

collectionsites,theretailstorewherethebatterieswerepurchased,or

whereverbatteriesaresold.

Disposal:Donotdisposeofthisinstrumentinhouseholdwaste.Theuseris

obligatedtotakeend‐of‐lifedevicestoadesignatedcollectionpointforthe

disposalofelectricalandelectronicequipment.



www.GlobalTestSupply.com

Find Quality Products Online at: sales@GlobalTestSupply.com

MA145‐en‐GB_V1.15/15

Specifications

ELECTRICALSPECIFICATIONS

FunctionRangeResolutionAccuracy(ofreading)

50~100Hz100~400Hz

ACCurrent

60.00A0.01 ±(1.5%+25digits)<3A

±(1.5%+5digits)≥3A

±(2.5%+25digits)<3A

±(2.5%+5digits)≥3A

300.0A0.1

FunctionRangeResolutionAccuracy(ofreading)

DCCurrent

60.00A(1)0.01 ±(1.5%+10digits)(2)

300.0A0.1 ±(1.5%+5digits)

(1)<0.3Avariationwhenmeasuringinvaryingdirections

(2) Add10dtoaccuracyinAUTOAC/DCsensemode

FunctionRangeResolutionAccuracy(ofreading)50Hz/60Hz

LowPassFilter

(LPF)

60.00A0.01 ±(3.5%+25digits)<3A

±(3.5%+5digits)≥3A

300.0A0.1

Cut‐offfrequency(‐3db):160Hz(approximately)

Attenuationcharacteristic:‐24dbperoctave(approximately)

FunctionRangeResolutionAccuracy(ofreading)

InrushCurrent300.0A0.1 ±(3.5%+5digits)

Integrationtime:100ms

Triggercurrent(threshold):5A

Voltage

Detector80V~600VACn/an/a

Thetipoftheclampofferstheoptimumsensitivity

Notes:

Clamppositionerror:±1.5%ofreading

Accuracyisgivenas±(%ofreading+leastsignificantdigit)at23C±5Cwithrelativehumidity

lowerthan80%.Accuracyisspecifiedforaperiodofoneyearaftercalibration.

ACAspecificationsareforACCoupled,TrueRMS.Forsquarewavetheaccuracyfor>100Hzis

unspecified.

Fornon‐sinusoidalwaveforms,additionalaccuracyCrestFactor(C.F.)considerationsexistas

detailedbelow:

Add3.0%forC.F.1.0~2.0

Add5.0%forC.F.2.0~2.5

Add7.0%forC.F.2.5~3.0

www.GlobalTestSupply.com

Find Quality Products Online at: sales@GlobalTestSupply.com

Table des matières

Autres manuels Extech Instruments Instrument de mesure

Extech Instruments

Extech Instruments LT300 Manuel utilisateur

Extech Instruments

Extech Instruments MO270 Manuel utilisateur

Extech Instruments

Extech Instruments MA610 Manuel utilisateur

Extech Instruments

Extech Instruments HD755-NIST Manuel utilisateur

Extech Instruments

Extech Instruments 407303 Manuel utilisateur

Extech Instruments

Extech Instruments 407738 Manuel utilisateur

Extech Instruments

Extech Instruments DT500 Manuel utilisateur

Extech Instruments

Extech Instruments 461895 Manuel utilisateur

Extech Instruments

Extech Instruments 380803 Manuel utilisateur

Extech Instruments

Extech Instruments LT45 Manuel utilisateur

Extech Instruments

Extech Instruments MO25 Manuel utilisateur

Extech Instruments

Extech Instruments 407113 Manuel utilisateur

Extech Instruments

Extech Instruments 407820 Manuel utilisateur

Extech Instruments

Extech Instruments RH390 Manuel utilisateur

Extech Instruments

Extech Instruments PM200 Manuel utilisateur

Extech Instruments

Extech Instruments TH10 Manuel utilisateur

Extech Instruments

Extech Instruments ExStik EC510 Manuel utilisateur

Extech Instruments

Extech Instruments 407510 Manuel utilisateur

Extech Instruments

Extech Instruments 407860 Manuel utilisateur

Extech Instruments

Extech Instruments SP505 Manuel utilisateur

Extech Instruments

Extech Instruments Oyster 341350A-P Manuel utilisateur

Extech Instruments

Extech Instruments 380560 Manuel utilisateur

Extech Instruments

Extech Instruments UM200 Manuel utilisateur

Extech Instruments

Extech Instruments HD300-NISTL Manuel utilisateur

Manuels Instrument de mesure populaires d'autres marques

Suaoki

Suaoki D40 Manuel utilisateur

Elster

Elster BK-G1.6 Manuel utilisateur

Endress+Hauser

Endress+Hauser Deltabar FMD71 Manuel

Duratool

Duratool D03128 Manuel utilisateur

Vega

Vega VEGAPULS 65 Manuel utilisateur

Tonghui

Tonghui TH2618B Manuel utilisateur

Tenmars

Tenmars TM-801 Manuel utilisateur

MSR

MSR 145 Manuel utilisateur

TPS

TPS WP-82 Manuel utilisateur

ELMETRON

ELMETRON CP-511 Manuel utilisateur

PCB Piezotronics

PCB Piezotronics 003C30 Manuel utilisateur

Tenma

Tenma 72-10465 Manuel utilisateur

Endress+Hauser

Endress+Hauser Proline Promag 50 Caractéristiques techniques

Siemens

Siemens SITRANS F Coriolis FCT030 Manuel de la liste des pièces

KLINGER

KLINGER CMF V Series Manuel utilisateur

EXFO

EXFO FTB-2 Manuel d'exploitation et d'entretien

Keysight

Keysight M8290A Manuel utilisateur

ADTEK

ADTEK MW-5 Manuel utilisateur