Emerson Rosemount 5400 Series Reference Manual page 43

Reference Manual
00809-0100-4026, Rev HA
(1) For Rosemount 5402, the values for maximum nozzle height are recommendations. Note that the Rosemount 5402
with cone antenna can be recessed in smooth nozzles up to 6 ft (2m).
Table 3-2. Minimum Nozzle Diameter and Maximum Nozzle Height for Rod Antennas
Model Antenna
(1)
Rod (short)
5401
Rod (long)
(1) For Rosemount 5401, the values for minimum nozzle diameter and maximum nozzle height are requirements.
Table 3-3. Minimum Nozzle Diameter and Recommended Maximum Nozzle Height for Process Seal
Antennas
Model Antenna
(1)
Process Seal 2 in. (50 mm)
5402
Process Seal 3 in. (75 mm)
Process Seal 4 in. (100 mm)
(1) For Rosemount 5402, the values for maximum nozzle height are recommendations. Note that the Rosemount 5402
with process seal antenna can be recessed in smooth nozzles up to 6 ft (2m).
Table 3-4. Minimum Nozzle Diameter and Maximum Nozzle Height for Extended Cone Antennas
Model Antenna
(1)
5402 Extended Cone Antenna, S3
5401
Extended Cone Antenna, S3
(1) For Rosemount 5402, the values for maximum nozzle height are recommendations.
(2) The extended cone antennas are available in 5 in. (125 mm) step increments from 10 to 50 in. (250-1250 mm). Consult
your local Emerson Process Management representative for more information. Expect long lead times for sizes other
than the 20 in. (500 mm) version.
Install the transmitter as follows:
„
„
„
For more information, see
Mechanical Installation
L in. (mm)
max
4.0 (100)
10 (250)
L in. (mm)
max
19.7 (500)
19.7 (500)
19.7 (500)
L
max
in. (mm)
(2)
20 in. (500 mm)
(2)
20 in. (500 mm)
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.
"Nozzle considerations" on page
Section 3: Mechanical Installation
Min. diameter in. (mm)
1.5 (38)
1.5 (38)
Min. diameter in. (mm)
2.0 (51)
3.0 (77)
4.0 (102)
Min. diameter
in. (mm)
See Table 3-1
See Table 3-1
27.
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