26
4 Mounting
VEGAPULS SR 68 • 4 … 20 mA/HART - two-wire
38294-EN-160707
To avoid strong buildup and dust in the antenna system, the sensor
should not be mounted directly at the dust extraction of the vessel.
In case of extreme dust deposits in the antenna system, VEGAPULS
SR 68 is available with a rinsing air connection. The air is distributed
via channels in the antenna system and keeps it largely free of dust.
Fig. 23: Purging air connection with horn antenna
Fig. 24: Purging air connection with parabolic antenna
The practice has shown that a pressure of approx. 0.2 … 1 bar
provides a sufficient air flow (see diagram in chapter "
Technical data
",
"
Purging air connection
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Dust deposits