Emerson Rosemount 5900, Справочное руководство

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Reference Manual
300520EN, Rev AA
November 2009
Rosemount 5900 Series
3-6
Section 3. Installation
3.2.2 Parabolic
Antenna
Requirements
Inclination
The inclination of the Rosemount 5900 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.
Figure 3-3. Maximum inclination
with parabolic antenna
Flange Requirements
The Rosemount 5900 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: T30 and T38-W. Model T 38-W is
welded on the flange. Model T 30 is attached to the flange with a nut. The
Flange Ball has to be mounted on the tank flange prior to mounting the gauge
on the tank nozzle.
Certain flange requirements have to be fulfilled in order to ensure that the
radar beam is not disturbed by the tank wall, and maximum signal strength is
reflected from the product surface back to the level gauge.
With Flange Ball Model T30 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
• within ±3° horizontally along the tank wall
Maximum inclination 1.5°
Preliminary