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Reference Manual
00809-0700-4530, Rev AA
Section 3: Commissioning
September 2013
Commissioning
Rosemount 3300 Series
Radar Configuration Tool > Setup > Tank Config tab (click Receive Page) > Upper Null Zone
(enter desired value in field and click Send Page)
3.3.3 Measure and learn function
The Rosemount 5300 and 5400 Series have a firmware functionality to automatically adjust
threshold settings to make the measurement more robust. The Measure and Learn function in
RRM automatically creates an Amplitude Threshold Curve (ATC) used by the Rosemount 5300
and 5400 Series transmitter to find the surface pulse. For best practice, use the Measure and
Learn function in the empty tank.
RRM > Echo Curve > Configuration Mode> Learn
Always review the threshold settings at operating conditions. See “Echo curve constituents” on
page 65, and the Rosemount 5300 or 5400 Series Reference Manuals for details (Document No.
00809-0100-4530 or Document No. 00809-0100-4026).
3.3.4 Vapor compensation
For high pressure steam applications, the DC of the vapor increases (DC of air is 1). Therefore,
vapor compensation is required for accurate level measurement. The table below provides
examples of error in level measurement reading with incorrect static vapor compensation.
The Rosemount 5300 Series is available with both static and dynamic compensation. If the static
compensation is used, is important that the correct DC value is entered. If dynamic
compensation is used, the transmitter automatically compensates for changes in vapor
dielectrics.
Table 3-4. Level reading errors during shutdown, with fixed saturated water steam
correction activated
NOTE:
When performing a verification at ambient pressure and temperature conditions, always set
vapor dielectric to 1 (applies to static vapor compensation). Otherwise, the level reading will be
incorrect. Also see “Static Vapor Compensation (Rosemount 5300 Series)”.
Static Vapor Compensation (Rosemount 5300 Series)
For high pressure saturated steam applications the specific properties of water and saturated
steam must be taken into account when commissioning the transmitter. The standard version
Entered
Vapor DC
Error in reading, when actual Vapor DC is 1 Offset in reading, if
Vapor DC is
configured correctly
Surface at 15 in (380 mm)
from flange
Surface at 30 in. (760 mm)
from flange
1.001 0 in. (0 mm) 0 in. (0 mm) 0 in. (0 mm)
1.022 0.2 in. (4 mm) 0.3 in. (8 mm) 0 in. (0 mm)
1.180 1.3 in. (33 mm) 2.6 in. (65 mm) 0 in. (0 mm)