Emerson Rosemount 3308 Series Reference Manual page 27

Reference Manual
00809-0100-4308
3.3.3 Flange connection on nozzles
Figure 3-3: Mounting in Nozzles
A. Maximum nozzle height
B. Minimum nozzle diameter
C. Confirm the nozzle does not extend into the tank.
The transmitter can be mounted in nozzles by using an appropriate flange. It is
recommended that the nozzle size is within the dimensions given in
Note
The probe must not be in contact with the nozzle (except for the coaxial probe).
Table 3-2: Nozzle Considerations
Description
Recommended
nozzle diameter
Minimum nozzle
diameter
Maximum nozzle
height
(1) The Trim Near Zone (TNZ) function may be necessary or an Upper Null Zone (UNZ) setup may be
required to mask the nozzle.
(2) Recommended maximum nozzle height. For coaxial probes there is no limitation on nozzle
height.
(3) For nozzles taller than 4 in. (100 mm), the long stud version is recommended (option code LS) to
prevent the flexible portion from touching the edge of the nozzle.
Reference Manual
Flexible single
lead probe
4 in. (100 mm) or
more
1.5 in. (38 mm)
(1)
4 in. (100 mm) +
(2)
nozzle diameter
Rigid single lead Flexible twin
probe/ lead probe
Segmented rigid
single lead
4 in. (100 mm) or 4 in. (100 mm) or
more more
1.5 in. (38 mm) 2 in. (50 mm)
for probe type 4A
2 in. (50 mm) for
probe type 4B and
4S
4 in. (100 mm) + 4 in. (100 mm) +
(3)
nozzle diameter nozzle diameter
Installation
February 2020
Table 3-2.
Coaxial probe
> probe diameter
> probe diameter
N/A
27