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Gebruiksaanwijzing
34
Gebruik van geleiding voor
hogeweerstandstests
Geleiding, het tegenovergestelde van weerstand, is het
vermogen van een circuit om stroom door te laten. Hoge
geleidingswaarden betekenen lage weerstandswaarden.
De eenheid van geleiding is de siemens (S). Het meterbereik van
50 nS meet geleiding in nanosiemens (1 nS =
0,000000001 siemens). Omdat zulke kleine geleidingswaarden
overeenstemmen met een uiterst hoge weerstand, wordt het nS-
bereik gebruikt om de weerstand van componenten tot maximaal
100.000 MΩ of 100.000.000.000 Ω(1 nS = 1000 MΩ) te bepalen.
Zet de draaiknop op S en stel de meter in zoals in
afbeelding 18 om geleiding te meten. Zet de menuselector naast
het menu-item met het label Ohms,nS,j en druk op de softkey
met het label nS.
Gewoonlijk wordt een restgeleiding afgelezen met open
meetkabels. Om nauwkeurige aflezingen te verkrijgen, drukt u op
de softkey met het label Menu. Zet de menuselector naast het
menu-item met het label REL en druk op de softkey met het label
REL om de restwaarde af te trekken met open meetkabels.
NB
Ris niet beschikbaar wanneer de meter geleiding
meet.
est14.eps
Afbeelding 18. Geleiding meten
44


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