Rosemount 5300 Series

Reference Manual

00809-0100-4530, Rev BA July 2009

Table 3-1. Nozzle considerations

The transmitter can be mounted in nozzles by using an appropriate flange. The nozzle sizes given in Table 3-1show the recommended dimensions. For small nozzles, it may be necessary to increase the Upper Null Zone (UNZ) to reduce the measuring range in the upper part of the tank. Amplitude Threshold adjustments may also be needed in this case. A Trim Near Zone is recommended in most nozzle installations, for example, when there are disturbing obstacles in the near zone. See Appendix C: Handling of Disturbances from Nozzle on page C-4.

NOTE!

The probe should not contact the nozzle, with the exception of the Coaxial Probe. If the nozzle diameter is less than recommended, the measuring range may be reduced.

 

 

Single (Rigid/Flexible)

Coaxial

Twin (Rigid/Flexible)

Recommended

 

6 in. (150 mm)

> Probe Diameter

4 in. (100 mm)

Nozzle Diameter (D)

 

 

 

 

 

 

 

 

Minimum Nozzle

 

2 in. (50 mm)

> Probe Diameter

2 in. (50 mm)

Diameter (D)(1)

 

Recommended

(2)

4 in. + Nozzle Diameter(3)

N/A

4 in. + Nozzle

Nozzle Height (H)

 

 

 

Diameter

(1)The Trim Near Zone function may be necessary or an Upper Null Zone setup may be required to mask the nozzle.

(2)Longer nozzles may be used in certain applications. Consult your local Emerson Process Management representative for details.

(3)When using single flexible probes in tall nozzles, it is recommended to use the Long Stud (LS).

3-4

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Emerson Process Management 5300 manual Single Rigid/Flexible Coaxial, Nozzle Diameter D, Diameter D1 Recommended