Extech Instruments EX655

EX65x‐en‐GB_V1.67/16
19
Non‐ContactVoltageDetector
WARNING:Itispossibleforvoltagetobepresentinacircuitevenifthemeterdoesnot
beeporflashtheNCVLEDlamp.AlwaysverifymeteroperationonaknownliveACcurrent
circuitandverifythatthebatteriesarefreshbeforeuse.

WhenthemetersensesanACVoltageorelectromagneticfield>100VAC,thefollowingoccurs:
 TheaudiblebeepersoundsONandOFF
 TheLEDlampattheNCVfunctionswitchpositionflashesONandOFF
 Thedisplayshows1,2,3,or4dashes
Thegreatertheelectrical
fieldstrength,thefastertherateoftheaudiblebeeper,theflashingof
theLEDlamp,andthenumberofdashesdisplayed.Ifthemeterdoesnotemitatoneorflash
theLEDinthismode,thereisstillthepossibilitythatvoltageispresent;pleaseusecaution.
1.
TurnthefunctionswitchtotheNCVpositiontoselectNon‐ContactVoltageDetectmode.
2. NotethatEFisdisplayedwheninthismode.IftheEFdoesnotdisplaywhenthefunction
switchisturnedtotheNCVposition,checkthebatteriesanddonotusethemeter
untilEF
isdisplayed.
3. Totest,placethemeternearasourceofelectricalenergy.Notethatthetipofthemeter
offersthehighestsensitivity.
4. Notetheaudiblebeeping,theflashingLED,andthedisplayeddasheswhenasourceof
electricalenergyisdetected.

Fig4‐5NON‐CONTACTVOLTAGEDETECTOR