Emerson Rosemount 5900S Series, Справочное руководство

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Figure 3-1: Nozzle Requirements for the Horn Antenna Gauge
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A. Horizontal flange
B. 4° inclined flange
C. Minimum 800 mm (31.5 in.) for highest accuracy. Minimum 500 mm (19.7 in.) with
reduced accuracy.
D. Maximum height: 330 mm (13 in.)
E. Minimum nozzle diameter 180 mm (7.1 in.)
F. Minimum nozzle diameter 185 mm (7.3 in.)
G. Note! For best performance the antenna should extend below the nozzle.
Free space requirements
There are two flanges available for the Horn Antenna gauge. One flange has a 4°
inclination and the other is horizontal. See installation drawing for flange dimensions.
The horizontal flange can be used if the wall does not intrude into the 30° wide radar beam
from the Horn Antenna.
In case a vertical antenna axis installation is not possible without the tank wall penetrating
the radar beam, the Rosemount 5900S has to be directed away from the wall by using the
4° flange. The inclination is necessary to ensure maximum accuracy.
Consider minimum free space distance L according to Table 3-2 and Figure 3-2 .
Installation Reference Manual
September 2019 00809-0100-5900
30 Reference Manual