Product Manual

MA260‐en‐GB_V1.15/15
2
Introduction
ThankyouforselectingtheExtechMA260200ATrueRMSOpenJawClampMeter.TheMA260
incorporatesAutoSensingwherethemeasurementtypeisautomaticallysensedandconfigured,
noneedtoturnadialtoselectthemeasurementtypeorrange.ForACVoltage,theAuto‐sense
featurealsoevaluatesinput
signalsandadjuststheInputImpedancetoeliminateeffectsofghost
voltages.
TheMA260measuresACcurrent,AC/DCVoltage,Resistance,Continuity,andDiodeandoffers
extra‐largedisplaydigits,datahold,andadisplaybacklightfunction.Thenon ‐contactVolt‐
Detectionfeature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
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.
 Thetimedelaythatresultsfromthemeter’sautomaticsensingcircuit(1to2seconds)maycauseGFCI
circuitstoresetandbreakerstotrip.


ItisnotrecommendedtousecalibrationequipmenttotesttheMA260.Calibratorscanbedamagedif
usedtotesttheMA260.

 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.
 Alwaysuseproperterminals.
 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current.Ifindoubt,havethemeterserviced.
 Donotapplymorethantheratedvoltage/current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.
 Whenusingtestleadsorprobes,pleasekeepfingersbehindthefingerguards.

 Removetestleadsfromthemeterbeforeopeningthebatterycompartmentorthemetercase.
 Usecautionwithvoltagesabove30VACrms,42VACpeak,or60VDC.Thesevoltagesposeashockhazard.
 ProbeassembliestobeusedforMAINSmeasurementsmustberatedasappropriateformeasurement
Category
IIIorIVaccordingtoIEC61010‐031andmusthaveavoltageratingofatleastthevoltageof
thecircuittobemeasured.
 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flexiblecurrentprobefromatestsetup.
 Donotapply/removetheflexiblecurrentprobeto/fromUNINSULATEDHAZARDOUSLIVEconductors
whichmaycauseelectricshock,electricburn,orarcflash.