Product Manual

FLIRCM174USERMANUALDocumentIdentifier:CM174‐en‐US_AB
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5.9DiodeTest(SMARTmode)
Warning:Donotperformdiodetestsbeforeremovingthepowerfromcapacitorsandother
devicesundertestduringameasurement.Injurytopersonscanoccur.
1. Ifnotalreadyselected,chooseSMARTDiodetestmodeintheProgrammingMenu
(SeeSection5.10.2).
2. Setthefunctionswitchtothediode position.
3. InserttheblackprobeleadintothenegativeCOMterminalandtheredprobelead
intothepositiveΩterminal.
4. UsetheMODEbuttontoselectthediodetestfunction.Thediodeindicator will
bedisplayed.
5. Touchthetipsoftheprobeacrossthediodeorsemiconductorjunctionundertest.
6. Ifthereadingisbetween±0.40and+0.80V,thecomponentisgood;BADorO.L
displaysindicateadefectivecomponent.

InSMARTDiodemodetheCM174checksdiodesusingan
alternatingtestsignalsentthrough
thediodeinbothdirections.Thisallowstheusertocheckthediodewithouthavingtoreverse
polaritymanually.Themeterdisplaywillshow±0.4~0.7Vforagooddiode,BADforashorted
diode,andO.Lforanopeneddiode.SeeFig.5.7below:

Figure5.7DiodeTestintheSMARTmode
bAd
- 0.4V
+ 0.4V
O.L
O.L
bAd
