VEGA VEGASON 66 4 … 20 mA_HART four-wire - Manual (Page 12)

The reference plane for the measuring range (version A) is the
lower edge of the flange. The reference plane for versions B, C
and D is the lower edge of the transducer.
Make sure that for all versions a min. distance - the so called
dead zone - below the reference plane is maintained in which a
measurement is not possible. The exact value of the dead
zone is stated in the "Technical data" in the "Supplement".
Information:
If the medium reaches the transducer, buildup can form on it
and cause faulty measurements later on.
1 3 2
100%
0%
4
Fig. 3: Version A - Measuring range (operating range) and max. measuring
distance
1 full (dead zone)
2 empty (max. measuring distance)
3 Measuring range
4 Reference plane
Measuring range
12 VEGASON 66 - 4 ... 20 mA/HART - four-wire
Mounting
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