MA44x 8/16‐en‐GB_V1.0
2
Introduction
Thank you forselectingthe Extech EX44x 400A Series ClampMeter.
The MA440 is a 400AACClampmeterwith a total of 9 functions.
The that MA443 is a 400A True RMSACClampmeter offers10functionsincludingTRMSAC
measurementsandType K Thermocouple
The MA445 is a 400A 11 AC/DC True RMSClampmeterwith functionsincludingDCCurrent, TRMS
ACmeasurements, and Type K Thermocouple.
TheMA44x 4000seriesarehand‐held, countclampmeters. seriesThismeter measures AC/DC
voltage,ACcurrent,DCcurrent (MA445), continuity, resistance,diode, capacitance,temperature
(MA443 MA445),and frequency,anddutycycle.Inaddition,thesemetersofferDisplayhold,MIN‐
MAX(MA443 MA445), Relativeand mode,NCV(non‐contactvoltage detection), andautomatic
powerOFF.
Inadditionto (Quickthe themeter, packagingincludesInstructionaldocumentation Start),Test
Leads, ‐K typetemperatureprobe(MA443 MA445),and batteries,and a pouch.
This tested calibrated reliabledeviceisshippedfully and and,withproperuse,willprovideyearsof
service. forPleasevisitour website (www.extech.com) tocheck thelatestversionofthisUser
Guide,ProductUpdates, CustomerProductRegistration,and Support.
Safety
Toensurethe thesafeoperationandserviceof meter,followtheseinstructionsclosely.Failuretoobserve
warningscanresultinseverepersonalinjuryordeath.
TheseinstrumentsaredesignedandproducedinstrictaccordancewithIEC/EN61010‐1,IEC/EN61010‐ ‐ 2 032,
and andIEC/EN61010‐ ‐2 033,safetystandards, comply with the safety standard for double insulation,
overvoltageCATIII600Vandpollutionlevel2.Pleaseobserve all operational and safety instructions
otherwisetheprotection provided byinstrumentmaybecompromised.
These standardinstrumentsconformtoUL 61010‐1, 61010 032, 61010 033; ‐ ‐2 ‐ ‐2theseinstrumentsare
certifiedtoCSA no.standardC22.2 61010 033.‐1, 61010 032, 61010IECstandard ‐ ‐2andIECstandard ‐ ‐2
CAT test connected sectionIII:Applicableto andmeasuringcircuits tothedistribution of a building’slow
voltage safetymainsinstallation;beforeuse pleaseoftheseinstruments observeandobeyall instructions.
