Extech Instruments MA440

MA44x‐en‐GB_V1.08/16
7
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.
