Emerson Rosemount 5408 Reference Manual page 22

Mechanical installation
March 2023
Table 3-4: Beam Width, ft. (m)
Distance
(D)
16 (5)
33 (10)
49 (15)
66 (20)
82 (25)
98 (30)
131 (40)
197 (60)
262 (80)
328 (100)
492 (150)
3.3.7 Nozzle requirements
To allow the microwaves to propagate undisturbed, the nozzle dimensions should be kept
within the specified limits as given in
Nozzle requirements for cone antenna
For best performance, the cone antenna should extend at least 0.4 in. (10 mm) below the
nozzle. If required, use the extended cone antenna versions (option code S1 or S2).
However, the antenna can be recessed in smooth nozzles up to 4 ft. (1.2 m). Note that if the
inside of the nozzle has irregularities (e.g. due to bad welding, rust, or deposit), then use
the extend cone antenna.
Figure 3-6: Mounting of the Cone Antenna
H
22
1½-in. cone 2-in. cone/
process seal
6.2 (1.9) 5.2 (1.6)
12.8 (3.9) 10.4 (3.2)
19.0 (5.8) 15.6 (4.8)
25.6 (7.8) 20.8 (6.3)
31.8 (9.7) 26.0 (7.9)
38.4 (11.7) 31.2 (9.5)
51.2 (15.6) 41.6 (12.7)
N/A N/A
N/A N/A
N/A N/A
N/A N/A
> 0.4 in. (10 mm)
D
Beam width (W)
3-in. cone/
process seal
4.0 (1.2)
8.1 (2.5)
12.1 (3.7)
16.1 (4.9)
20.1 (6.1)
24.2 (7.4)
32.2 (9.8)
N/A
N/A
N/A
N/A
Table 3-5, Table 3-6, and
Reference Manual
00809-0100-4408
4-in. cone/ Parabolic
process seal
2.9 (0.9) 1.3 (0.4)
5.7 (1.8) 2.6 (0.8)
8.6 (2.6) 3.9 (1.2)
11.5 (3.5) 5.2 (1.6)
14.3 (4.4) 6.4 (2.0)
17.2 (5.3) 7.7 (2.4)
23.0 (7.0) 10.3 (3.1)
34.5 (10.5) 15.4 (4.7)
45.9 (14.0) 20.7 (6.3)
57.4 (17.5) 25.9 (7.9)
86.0 (26.2) 38.7 (11.8)
Table 3-7.
Reference Manual