26
Reference Manual
00809-0100-4530, Rev DD
May 2016
Note
Metal pipes are preferred, especially in applications with low dielectric constant, to avoid
disturbances from objects near the pipe.
Figure 3-9. Mounting Single Probe in Chamber/Still Pipe
Inlet pipe diameter N < Ø. Effective measuring range L
12 in. (300 mm).
Table 3-3. Recommended and Minimum Chamber/Still Pipe Diameters for Different
Probes
A chamber or pipe installation is the preferred option due to the increase in stability and
performance of the transmitter. When selecting a smaller diameter chamber or pipe (such
as 2 in.) a flexible probe is not suitable due to the chance of it coming into contact with the
walls, and relatively large side inlets may interfere with the signal.
When gas lift and/or turbulence may occur (e.g. boiling hydrocarbons), a 3- or 4-in.
chamber/pipe diameter is recommended for maximum measurement reliability. This is
especially true in high pressure and high temperature installations.
It is recommended that single probes are used with the Rosemount 5300 Series. Other
probe types are more susceptible to build-up and are not recommended.
(1)
An exception is
with liquefied gas > 40 bar when the coaxial probe should be used.
Probe type
Recommended diameter
Minimum diameter
Rigid single/segmented
rigid single
3 or 4 in. (75 or 100 mm)
2 in. (50 mm)
Flexible single
4 in. (100 mm)
Consult your local Emerson Process
Management representative
Rigid twin
(1)
1.
The center rod must be placed more than 0.6 in. (15 mm) away from the pipe wall.
3 or 4 in. (75 or 100 mm)
2 in. (50 mm)
Flexible twin
4 in. (100 mm)
Consult your local Emerson Process
Management representative
Coaxial
3 or 4 in. (75 or 100 mm)
1.5 in. (37.5 mm)
1.
The single probe creates a virtual coaxial probe with the chamber as the outer tube. The extra gain provided by the twin and coaxial
probes is not necessary; the electronics in the Rosemount 5300 Series is very sensitive and is not a limiting factor.
Rigid single/segmented
rigid single
Flexible single
N
L
Ø
Ø
Содержание 5300 Series
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