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Elma BM869 side 27
Kapacitans- och diodtestfunktioner
För modell Elma BM869: Tryck på SELECT -knappen för att välja funktion på
modellerna. Sist valda funktion sparas när instrumentet stängs av.
Not!
Ladda alltid ur stora kondensatorer innan mätning. Ett stort antal kondensatorer skall alltid
laddas ur genom ett passande motstånd.
Normalt spänningsfall för en silikondiod ligger mellan 0,4 och 0,9V. En avläsning högre än
detta värde kan indikera att dioden är defekt. En noll-avläsning kan indikera en kortsluten
diod. En ”OL”-visning i displayen indikerar en öppen diod. Byt plats på testledningarna
genom dioden. Det digitala displayen ”OL” om dioden är OK. Alla andra displayvisningar
indikerar att dioden antingen är resistiv eller kortsluten.
nS konduktans, resistans & genomgång
Tryck på SELECT -knappen för att välja funktion på modellerna 525, 521, 829 & 827. Sist
valda funktion sparas när instrumentet stängs av. Vrid på vredet till
resistans och
genomgång.
Not! Konduktans är motsatsen till resistans. I realiteten utvidgar resistansmätningarna sig
till Giga-Ohm för mätning på läckage.
Genomgångsfunktionen är användbar vid kontroll av ledningsförbindelser och brytare.
En kontinuerlig pip-ton indikerar en ”hel” ledning.
27


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