Emerson Rosemount 5408 Reference Manual page 30

Mechanical installation
February 2020
Antenna
Figure 3-9: Still Pipe Requirements
A. Maximum 0.2 in. (5 mm)
B. Maximum 1 in. (25 mm)
C. Minimum 6 in. (150 mm)
D. Maximum 1°
E. Level = 100%
F. Level = 0%
Chamber
Consider the following chamber requirements:
• Pipes should be an all-metal material.
• Pipe should have a constant inside diameter.
• Inlet pipes should not protrude into the inside of the stand pipe.
(1) A larger gap is inevitable for the 4-in. cone antenna in pipes with a diameter larger than 4 in.
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• All cone/process seal antenna sizes can be used for still pipe/chamber
installations.
• The gap between the cone antenna and the still pipe should be maximum
(1)
0.2 in. (5 mm) . Larger gaps may result in inaccuracies. If required, order a
larger antenna and cut on location. See
Reference Manual
00809-0100-4408
Table A-20 for antenna dimensions.
Reference Manual