Figure 7-29: Hold Off Distance/UNZ
$
%
&
'
(
A. Upper Reference Point
B. Hold Off Distance/UNZ
C. Disturbance
D. Surface peak
E. Surface Threshold
Set the hold off distance/upper null zone using Rosemount Radar
Master
Prerequisites
Note
By adjusting the Hold Off Distance/UNZ, the measuring range is reduced.
Note
Before changing the Hold Off Distance/UNZ, check entered value for the high alarm limit.
The high alarm limit must be outside the Hold Off Distance/UNZ.
Procedure
1. Use the Echo Curve plot to verify if there are disturbances in the upper part of the
tank.
Service and troubleshooting
Reference Manual
April 2019
00809-0100-4530
228
Rosemount 5300 Level Transmitter
Содержание Rosemount 5300 Series
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