EXTECH MA620 [12/17] Diode test

MA61_MA63-en-GB_V1.0 3/15

DiodeTest

1. InserttheblacktestleadbananaplugintothenegativeCOMjackandtheredtest

leadbananaplugintothepositivejack.

2. Turnthefunctionswitchtoposition.UsetheMODE

buttontoselectthediodefunctionifnecessary(thediodeand

voltagesymbolswillappearonthe

LCDwheninDiodetest

mode).

3. Touchthetestprobetipstothediodeorsemiconductor

junctionundertest.Notethemeterreading

4. Reversethetestleadpolaritybyreversingtheredandblack

leads.Notethisreading

5. Thediodeorjunctioncanbeevaluatedasfollows:

 Ifonereadingdisplaysavalue(typically0.400Vto

0.900V)andtheotherreadingdisplaysOL,thediodeis

good.

 IfbothreadingsdisplayOLthedeviceisopen.

4. Ifbothreadingsareverysmallor‘0’,thedeviceisshorted.

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Fig‐9DIODETEST

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