Emerson 5301HxxxxxxxxxxxxxxZZ Series Reference Manual page 299

Reference Manual
00809-0100-4530
Figure A-17: Minimum Distance X and Minimum Measuring Span
• If a Rosemount 5300 Level Transmitter is ordered from Rosemount together with a
Rosemount 9901 Chamber, these space requirements are met by using the option
code G1or G2 for the chamber. G1 is used with the short reference reflector and G2 is
used with the long reference reflector. If an existing chamber is used which does not
meet these space requirements, a spool piece can be added.
• Always ensure there are no disturbances from inlets etc. close to the reference reflector
end when using probe type 4U.
Select reference reflector
• The long reflector, 20 in. (500 mm), has the best accuracy and is recommended for all
chambers where the dimensions of the chamber allow for it.
• If the distance from the flange to the upper inlet is less than 28 in. (710 mm), the short
reflector should be chosen. This distance is a minimum when dynamic compensation is
required within the whole measuring range from the lower to the upper inlet. If this is
not required, the long reflector can be used and dynamic compensation is possible up
to 28 in. (710 mm) from the flange.
For more information, refer to the High Pressure Steam Applications
Reference Manual
A. Level: 100%
B. Minimum measuring span: 12 in. (300 mm)
C. Level: 0%
Specifications and reference data
Technical Note.
April 2019
299