30
Reference Manual
00809-0100-4026, Rev KC
Mechanical Installation
October 2018
Mechanical Installation
Figure 3-19. Mounting of the Rosemount 5400 Extended Cone Antenna
Table 3-5. Minimum Nozzle Diameter and Maximum Nozzle Height for Extended Cone Antennas
Install the transmitter as follows:
Align the antenna vertically.
Choose the largest antenna diameter possible. A larger receiving area concentrates the radar beam
and ensures maximum antenna gain. Increased antenna gain permits greater margin for weak surface
echoes. A larger antenna also results in smaller beam angle and thereby, less interference from any
internal structures in the tank.
For best measurement performance, the antenna should extend below the nozzle
0.4 in. (10 mm) or more.
For more information, see “Nozzle considerations” on page 23.
Model Antenna L
max
in. (mm) Min. diameter in. (mm)
5402
(1)
1. For Rosemount 5402, the values for maximum nozzle height are recommendations.
Extended Cone Antenna, S3
(2)
2. The extended cone antennas are available in 5 in. (125 mm) step increments from 10 to 50 in. (250-1250 mm). Contact your local Emerson
Automation Solutions representative for more information. Expect long lead times for sizes other than the 20 in. (500 mm) version.
20 (500) See Tabl e 3 -1.
5401
Extended Cone Antenna, S3
(2)
20 (500) See Tabl e 3 -1.
L
Minimum diameter
> 0.4 in.
(10 mm)
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