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MA44x‐en‐GB_V1.08/16

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. Movethefunctionswitchtoanypositiontopowerthemeter.Checkthebatteriesiftheunit

failstopowerON.

2. MovethefunctionswitchtotheOFFpositiontoremovepowertothemeter.

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

OFFafter30

minutes(MA440)or15minutes(MA443/MA445)ofinactivity.TheMA443/MA445models

emitawarningtonepriortoautomaticallyswitchingoff.

DisableAutoPowerOFF(MA443andMA445)

TodefeattheAPOfeature:

1. WiththemeterOFF,pressandholdtheM(MODE)buttonand,whilecontinuingtoholdthe

Mbutton,turntherotaryswitchtoanyposition.

2. ThemeterwillbeepfivetimesindicatingthatAPOhasbeendeactivated.

3. TheAutoPowerOFFfunction

willnowbedisableduntilthenextcycleofpower.

4. WhenAPOisactive,theAPOsymbol



isdisplayed.WhenAPOisnotactive,theAPO

symbolisnotdisplayed.



Extech Instruments MA440 User Manual

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