Emerson Rosemount 5408, Reference Manual

Page: 31 / 274

• The inner surface must be smooth and clear of any rough edges. (Smooth pipe joints
are acceptable, but may reduce accuracy.)
• The gap between the cone antenna and the stand 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. See Table A-20 for antenna dimensions.
Figure 3-10: Chamber Requirements
$
%
&
'
A. Minimum 0.4 in. (10 mm)
B. Minimum 6 in. (150 mm)
C. Maximum 1°
D. Maximum 0.2 in. (5 mm)
3.3.9 Ball valve installation
The transmitter can be isolated from the process by using a valve:
• Use a full-port ball valve.
• Ensure there is no edge between the ball valve and the nozzle or still pipe, the inside
should be smooth.
• Valves can be combined with still pipes.
• The ball valve should have the same inner diameter as the still pipe.
Reference Manual Mechanical installation
00809-0100-4408 February 2020
Rosemount 5408 and 5408:SIS Level Transmitters 31