Parabolic Antenna Requirements - Emerson Rosemount 5900S Series Reference Manual

Rosemount 5900S Series
3.2.2 Parabolic
Antenna
Requirements
Figure 3-3. Maximum inclination
with Parabolic Antenna
3-6
Inclination
The inclination of the Rosemount 5900S with Parabolic Antenna should not
exceed 1.5 ° towards the center of the tank. For products with high
condensation such as bitumen/asphalt applications, the radar beam should
be directed vertically without any inclination.
Maximum inclination 1.5°
Flange Requirements
The Rosemount 5900S with Parabolic Antenna is mounted on the tank nozzle
by using the Flange Ball. It is designed for easy adjustment of gauge
inclination within the specified limits.
There are two versions of the Flange Ball. One that is clamped to the flange
by using a nut, and another one which is welded to the flange.
The Flange Ball has to be mounted on the flange prior to mounting the gauge
on the tank nozzle.
The flange needs to fulfill certain requirements in order to ensure that the
radar beam is not disturbed by the tank wall. This allows the radar signal to be
reflected on the product surface and transmitted back to the level gauge at a
maximum signal strength.
The tank flange has to meet the following inclination requirements (see
Figure 3-4) in order to allow proper adjustment of the antenna:
• maximum 4.5° away from the tank wall
• maximum of 2° towards the tank wall
Reference Manual
00809-0100-5900, Rev CA
June 2014
Section 3. Installation