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Bedienungshandbuch
22
Verwendung der Leitfähigkeit für Messungen
hoher Widerstände oder Lecktests
Leitfähigkeit, die Umkehrfunktion von Widerstand, ist die
Fähigkeit eines Schaltkreises, Strom zu leiten. Hohe
Werte von Leitfähigkeit (Leitwerte) deuten auf niedrige
Werte von Widerstand.
Der 60-nS-Bereich des Messgeräts misst die Leitfähigkeit
in Nanosiemens (1 nS = 0,000000001 Siemens). Da
diese geringen Leitfähigkeitswerte hohen
Widerstandswerten entsprechen, kann mit dem nS-
Bereich des Messgeräts der Widerstand von Bauteilen
bis zu 100,000 MΩ, 1/1 nS = 1.000 MΩ gemessen
werden.
Zum Messen von Leitfähigkeit das Messgerät zum
Messen von Widerstand gemäß Abbildung 5 einrichten,
dann drücken, bis der Anzeiger nS in der Anzeige
erscheint.
Ratschläge zum Messen von Leitfähigkeit:
Messungen in hochohmigen Schaltkreisen sind
anfällig für induzierte elektrische Störungen. Um die
Mehrheit der Rauschwerte zu glätten, in den Modus
MIN-MAX-Aufzeichnung schalten und dann den
Mittelwert (AVG) der Messung bestimmen.
Normalerweise gibt es bei offenen Messleitungen
einen Restleitwert. Genaue Ablesungen können in
der Betriebsart Relativ (REL) durchgeführt werden,
indem die Restleitfähigkeit abgezogen wird.
32


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