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Table 3-1: Distance to Tank Wall (L)
Application
Minimum
Recommended
Liquids
8 in. (200 mm)
½
of tank radius
Solids
8 in. (200 mm)
⅔
of tank radius
Table 3-2: Free Space Requirements
Description
Distance
Service space width (A)
20 in. (500 mm)
Service space height (B)
24 in. (600 mm)
3.3.3
Antenna size
Choose as large antenna diameter as possible. A larger antenna diameter concentrates the
radar beam and ensures maximum antenna gain. Increased antenna gain permits greater
margin for weak surface echoes.
In addition, a larger antenna diameter results in a smaller beam angle and thereby, less
interference from any internal structures in the tank.
3.3.4
Antenna inclination
Ensure the antenna is aligned perpendicular to the product surface (see
). The
parabolic antenna comes with a swivel connection that adjusts for angled tank roofs.
Note that if the surface echo is weak in solids applications, then a small inclination of the
parabolic antenna toward the surface slope may improve the performance.
Mechanical installation
Reference Manual
February 2020
00809-0100-4408
24
Reference Manual
Summary of Contents for Rosemount 5408
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Page 8: ...Contents Reference Manual February 2020 00809 0100 4408 viii Reference Manual ...
Page 10: ...Introduction Reference Manual February 2020 00809 0100 4408 10 Reference Manual ...
Page 20: ...Transmitter overview Reference Manual February 2020 00809 0100 4408 20 Reference Manual ...
Page 72: ...Mechanical installation Reference Manual February 2020 00809 0100 4408 72 Reference Manual ...
Page 100: ...Operation Reference Manual February 2020 00809 0100 4408 100 Reference Manual ...
Page 240: ...Product certifications Reference Manual February 2020 00809 0100 4408 240 Reference Manual ...
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