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Elma BM 82Xs &
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Side 14
end denne værdi kan indikere, at dioden er defekt. En nul aflæsning kan indikere en
kortsluttet diode. En ”OL” visning i displayet indikerer en åben diode. Byt rundt på
testledningsforbindelserne gennem dioden. Det digitale display viser ”OL”, hvis dioden er
OK. Alle andre displayvisninger indikerer, at dioden enten er resistiv eller kortsluttet.
A, mA og A funktioner
Tryk på SELECT knappen momentvis for at vælge DC, DC
+AC
, DC+AC
+AC
og AC
+Hz
.
Sidste valgte funktion vil blive husket i hukommelsen.
Note!
Når man måler på et 3-faset system, skal man være specielt opmærksom på fase-fase
spændingen, som er betydelig højere end fase-jord spændingen. For at undgå, at man
overskrider spændingsområdet på beskyttelses sikringerne , regn da altid med fase-fase
spændingen, som den ”nominelle” spænding for sikringerne.
Elektrisk felt detektering (Kun på Elma 829s & 827s)
Uanset i hvilken funktion man står i kan man trykke på EF knappen i et sekund eller mere
for at bladre hen til EF funktionen. Instrumentet viser i displayet: ”E.F”, når instrumentet er
klar. Signalstyrke bliver indikeret, som en serie af markørsegmenter på displayet samt
variable bip toner.
”Ikke kontakt EF-detektering”: En antenne er placeret langs toppen af
instrumentet, som detekterer elektrisk felt som omgiver strømbærende ledere. Dette
er ideelt for søgning efter installationer med spænding, søge efter kabelbrug og til at
skelne imellem ledninger med og uden spænding.
”Probe kontakt EF-detektering”: For mere præcis søgning på installationer med
spænding, som f.eks. at skelne imellem spændings- og jordforbindelser, brug da
den røde (+) testprobe for direkte kontakt målinger.
14


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