Emerson Rosemount 1208A Reference Manual page 87

Reference Manual
00809-0100-7062
Figure B-7: Upper Null Zone
A
C
A. Upper Null Zone
B. Disturbance echo
C. 100% (20 mA)
D. General threshold
E. Product surface echo
Related information
Change the upper null zone
Bottom offset
The Bottom Offset is defined as the distance between Zero Level and the tank bottom. The
default value is zero.
If the Zero Level is not located at the tank bottom, then enter a Bottom Offset. It is needed
for the transmitter to know the position of the tank bottom.
Reference Manual
B
D
E
0 150 300 450 600 750 900 mV
Configuration parameters
m
3.0
2.5
2.0
1.5
1.0
0.5
0
October 2022
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