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Elma 805/807
Side 7
DIODE TEST
Default er . Tryk SELECT knappen kortvarigt to gange for at vælge diode
test funktion. Normal forward spændingsfald (forward biased) for en god silicon
diode er i mellem 0.400V til 0.900V. Et højere resultat indikerer en defekt diode.
En nulaflæsning indikerer en kortsluttet diode (defekt). En OL aflæsning indikerer,
at dioden er åben (defekt). Byt om prøveledningerne (reverse biased) kryds
af dioden. Displayet viser OL, hvis dioden er god. Hvilket som helst andet viser, at
dioden er defekt.
KAPACITETSFUNKTION
Default at . Tryk SELECT knappen kortvarigt tre gange for at vælge
Kapacitet funktionen. Relativ nul kan ved måling af meget små kapaciteter
bruges til nulstilling af prøveledninger og den interne beskyttelseskreds der er i
instrumentet.
ADVARSEL
Aflad kondensatorerne før der måles dem . Store værdier bør aflades ved
hjælp af en dertil indrettet modstandskreds.
7


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