EXTECH EX381676A [10/13] Maintenance

381676A-en-GB_V1.1 08/15

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.

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.