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4. Messen und Prüfen
4.1 Allgemeines
Tasterfunktionen:
Ein-/Ausschalten, Eigentest (3.)
Nullabgleich (4.3)
Messen (4.4)
Nullabgleich (4.3)
Polaritätswechsel (4.4.1)
Automatikmodus (4.4.2)
Messwerte abrufen (4.4.2)
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4.2 Messaufbau
Zwischen dem Bezugserder (z.B. Potentialaus-
gleichs-Schiene oder Betriebserder) und dem
METRAOHM 413 kann jede beliebige Messleitung
(bis etwa 3,5 ) verwendet werden, die sich nach
Abschnitt 4.3 abgleichen lässt.
Es können Messstellen erreicht werden, die über
100 m vom Bezugserder entfernt sind.
In Umgebungen mit starken Feld-Einüssen sollte
die Leitung völlig abgewickelt sein, damit induktive
Einüsse vermieden werden.
Klemmen Sie die Messleitung gut leitend an
den Bezugserder (evtl. Korrosion beseitigen).
Stecken Sie das freie Ende der Messleitung in die
Buchse des METRAOHM 413 Bei Verwendung der
Abrollhaspel muss die mitgelieferte kurze Mess-
leitung in die Buchse der Haspel gesteckt weden.
Nur mit der auf der
Prüfspitze der Messleitung
aufgesteckten Sicherheits-
kappe dürfen Sie nach
DIN EN 61010-031 in einer
Umgebung nach Messkate-
gorie III messen.
Die Sicherheitskappe kann (z. B. für Verwendung
in 4 mm Buchsen) entfernt werden indem Sie den
Schnappverschluss mit einem spitzen Gegenstand
aushebeln.
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