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Rosemount Tank Radar REX
Chapter 12 Sensor Installation
12-6
Installation Manual
308014EN, Edition 4
May 2013
12.2.2 Configuration
It is important that the 4 mA and the 20 mA levels are properly configured
in order to obtain correct water level readings from the WLS. The
distance “X” between the Tank Zero Level and the Water Zero Level
has to be considered when configuring the WLS. “X” can be calculated
from known tank distances as illustrated in Fig. 12-8.
Figure 12-8. Tank geometry for the Water Level Sensor
The distance X can be calculated with the following formula:
X = (R-L1) - (L-L2).
X=distance between the Tank Zero Level and the Water Zero Level.
L=distance between Water Zero Level and mark on the upper part of the
WLS.
R= Tank Reference Height. This is the distance between the Tank
Reference Point and the Tank Zero Level.
L1=distance between the Tank Reference Point and the temperature
sensor flange.
L2=distance between the mark on the top of the WLS and the
temperature sensor flange.
wls_geometry_version2.eps
Water Zero
Level
Tank Zero Level
Tank Reference point
Mark
20 mA
4 mA