Vega VEGASON 61 Operating Instructions Manual page 12

4 Mounting
Cable entries - NPT
thread
Cable glands
Reference plane for
measuring range
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Fig. 2: Measures against moisture ingress
Metric threads
In the case of instrument housings with metric thread, the cable
glands are screwed in at the factory. They are sealed with plastic
plugs as transport protection.
You have to remove these plugs before electrical connection.
NPT thread
In the case of instrument housings with self-sealing NPT threads, it is
not possible to have the cable entries screwed in at the factory. The
free openings for the cable glands are therefore covered with red dust
protection caps as transport protection.
Prior to setup you have to replace these protective caps with ap-
proved cable glands or close the openings with suitable blind plugs.
The reference plane for the measuring range is the lower edge of the
transducer.
Make sure that a blocking distance below the reference plane is main-
tained in which a measurement is not possible. The exact value of the
blocking distance is stated in chapter " Technical data".
Fig. 3: Blocking distance to the max. level
1 blocking distance
2 Reference plane
Information:
If the medium reaches the transducer, buildup can form on it and
cause faulty measurements later on.
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VEGASON 61 • Four-wire 4 ... 20 mA/HART
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