Emerson Rosemount 5900C, Reference Manual

Page: 86 / 322

A
2. The standard length of the extended cone antenna is 500 mm (20 in.). If the
distance A between the flange and the maximum product level is smaller, the
antenna must be cut to meet the following specifications:
• the distance between the antenna and the tank roof is > 20 mm (0.8 in.)
• the distance between the maximum product level and the antenna is > 30 mm
(1.2 in.)
• the antenna is cut with a slant opening of 15°
Min. 20 mm
(0.8 in.)
Min. 30 mm
(1.2 in.)
Max. level
15°
Due to the slanting opening of the antenna, the direction of the radar beam is slightly
changed towards the short end of the antenna opening. If objects are present, which may
cause disturbing radar echoes, the antenna should be oriented in such a way that the
disturbing objects do not interfere with the radar signal.
Procedure
1. Mount the antenna and transmitter head in the same way as a gauge with a
standard cone antenna.
Installation Reference Manual
September 2019 00809-0100-5901
86 Reference Manual