Emerson Rosemount 5408 Reference Manual page 25

Reference Manual
00809-0100-4408
Holes
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%
(1) A larger gap is inevitable for the 4-in. cone antenna in pipes with a diameter larger than 4 in.
Rosemount 5408 and 5408:SIS Level Transmitters
• The inner surface must be smooth and clear of any rough edges. (Smooth
pipe joints are acceptable, but may reduce accuracy.)
• The end of the pipe must extend beyond the zero level.
• Maximum hole diameter is 1 in. (25 mm).
• Minimum distance between holes is 6 in. (150 mm).
• Holes should be drilled on one side only and deburred.
• Drill one hole above maximum product surface.
• 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
0.2 in. (5 mm) (1) . Larger gaps may result in inaccuracies. If required, order a
larger antenna and cut on location.
Mechanical installation
March 2023
25