Figure 7-28: Echo Curve Before and After Trim Near Zone
A. Reference Peak
B. Trim Near Zone
C. 0-3.3 ft (0-1 m)
Perform trim near zone using Rosemount Radar Master
The Trim Near Zone function is used to fine tune performance in the area close to the tank
top (Near Zone).
Prerequisites
Before performing the Trim Near Zone, ensure that:
• There is product in the tank.
• The product level is below the Near Zone region (0-3.3 ft (0-1 m) below the Upper
Reference Point).
• The ambient temperature is within 104 °F (40 °C) of the expected ambient operating
temperature.
Note
The Trim Near Zone function should only be used for reducing impact from stationary
disturbances. It is not suitable for occasional disturbances.
Note
For firmware version 2.A2 or later the Trim Near Zone is not possible in combination with
narrow nozzles, as defined below:
• 50 mm < Nozzle height < 300 mm
• Nozzle diameter < 2 in. for all single probes (except 13 mm single rigid)
• Nozzle diameter < 3 in. for 13 mm single rigid
Note
Trim Near Zone is not available for large coaxial probes.
Reference Manual Service and troubleshooting
00809-0100-4530 April 2019
Reference Manual 225
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