Extech Instruments MA145 Manuale utente

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

Indice

Altri manuali Extech Instruments Strumento di misura

Extech Instruments

Extech Instruments AN250W Manuale utente

Extech Instruments

Extech Instruments ExStik II EC400 Manuale utente

Extech Instruments

Extech Instruments 461923 Manuale utente

Extech Instruments

Extech Instruments 407355-NIST Manuale utente

Extech Instruments

Extech Instruments SDL550 Manuale utente

Extech Instruments

Extech Instruments 461893 Manuale utente

Extech Instruments

Extech Instruments HT200 Manuale utente

Extech Instruments

Extech Instruments 341350A Manuale utente

Extech Instruments

Extech Instruments SDL800 Manuale utente

Extech Instruments

Extech Instruments RC100 Manuale utente

Extech Instruments

Extech Instruments ExStik EC510 Manuale utente

Extech Instruments

Extech Instruments RPM250W Manuale utente

Extech Instruments

Extech Instruments Oyster 341350A-P Manuale utente

Extech Instruments

Extech Instruments CO15 Manuale utente

Extech Instruments

Extech Instruments 381235 Manuale utente

Extech Instruments

Extech Instruments AN310 Manuale utente

Extech Instruments

Extech Instruments CO240 Manuale utente

Extech Instruments

Extech Instruments PQ34-12 Manuale utente

Extech Instruments

Extech Instruments ExStik RE300 Manuale utente

Extech Instruments

Extech Instruments 407495 Manuale utente

Extech Instruments

Extech Instruments TG20 Manuale utente

Extech Instruments

Extech Instruments Extech 380976 Manuale utente

Extech Instruments

Extech Instruments EX830 Manuale utente

Extech Instruments

Extech Instruments HD400 Manuale utente

Manuali Strumento di misura popolari di altre marche

Suaoki

Suaoki D40 Manuale utente

Elster

Elster BK-G1.6 Manuale utente

Endress+Hauser

Endress+Hauser Deltabar FMD71 Manuale

Duratool

Duratool D03128 Manuale utente

Vega

Vega VEGAPULS 65 Manuale utente

Tonghui

Tonghui TH2618B Manuale utente

Tenmars

Tenmars TM-801 Manuale utente

MSR

MSR 145 Manuale utente

TPS

TPS WP-82 Manuale utente

ELMETRON

ELMETRON CP-511 Manuale utente

PCB Piezotronics

PCB Piezotronics 003C30 Manuale utente

Tenma

Tenma 72-10465 Manuale utente

Endress+Hauser

Endress+Hauser Proline Promag 50 Specifiche tecniche

Siemens

Siemens SITRANS F Coriolis FCT030 Manuale elenco delle parti

KLINGER

KLINGER CMF V Series Manuale utente

EXFO

EXFO FTB-2 Manuale operativo e di manutenzione

Keysight

Keysight M8290A Manuale utente

ADTEK

ADTEK MW-5 Manuale utente