Extech Instruments 381676A

381676A-en-GB_V1.1 08/15
10
LOGICTEST
WARNING:Topreventelectricshockanddamagetothemeterorpersonalinjury,donot
measurevoltagesthatmayexceed100VACrms.
NOTE:Ifthetestleadsaredisconnectedorifthevoltagemeasuredis<1.5VtheLEDwillbegreen.

1. UsetheprobecoverifmakingmeasurementsoncategoryIIIoraboveinstallations
2. SetthefunctionswitchtotheLOGICposition.
3. Inserttheblacktestleadbanana
plugintothenegative(common)jackatthebottomof
themeter.
4. Connecttheblacktestleadtothecircuit’sground(‐)terminal.
5. HolddowntheMode(M)buttonandtouchthetestprobetothecircuitfor
measurement.TheLEDsnearthetipofthemeterwill
indicatethecurrentlogiclevel.
6. Ifthemeasurementis0~1.5V,theGreenLEDwilllightandthedisplaywillshowadown
arrow,indicatingthatthelogictestresultisaLOW(‘0’)condition.
7. Ifthemeasurementis1.5~3.5V,theGreenandRedLEDswillbe OFF.
8.
Ifthemeasurementis3.5~5V,theRedLEDwilllightandthedisplaywillshowanup
arrow,indicatingthatthelogictestresultisaHIGH(‘1’)condition.Seediagram.

0V 1.5V 3.5V 5V
Green LED ON Green & Red LED OFF Red LED ON
LOW ‘0’ HIGH ‘1’

Maintenance
WARNING:Toavoidelectricalshock,disconnectthetestleadsfromanysourceofvoltage
beforeremovingthebackcoverorthebatterycover.

WARNING:Toavoidelectricalshock,donotoperatethemeteruntilthebatterycoverisinplace
andfastenedsecurely.
Thismeterwasdesignedtoprovideyearsofdependableservice.However,ifthefollowing
guidelinesarenotfollowed,thedependabilityofthemetercanbecompromised:
1. KEEPTHEMETERDRY.Ifitgetswet,wipeitoffandallowittodrybeforeuse.
2. USEANDSTORETHE
METERINNORMALTEMPERATURES.Environmentalextremescan
shortenthelifeoftheelectronicpartsanddistortormeltplasticparts.
3. HANDLETHEMETERGENTLYANDCAREFULLY.
4. KEEPTHEMETERCLEAN.Wipethecaseoccasionallywithadampcloth.Donotuse
chemicals,cleaningsolvents,abrasives,ordetergents.
5. USE
ONLYFRESHBATTERIESOFTHERECOMMENDEDSIZE/TYPE.
6. IFTHEMETERISTOBESTOREDFORALONGPERIODREMOVETHEBATTERIES
7. Repairsshouldonlybeimplementedbytrainedpersonnel.
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