Emerson Rosemount 2240S, Reference Manual

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59
Reference Manual
00809-0100-2240, Rev DA
Configuration/Operation
October 2017
Configuration/Operation
Configuration examples
Configuration of the water level sensor can basically be divided into three different cases as illustrated in
Table 5-2 below.
X<0 : Water Zero Level is located below the Tank Zero Level.
X=0 : Water Zero Level is located at the same position as the Tank Zero Level.
X>0 : Water Zero Level is located above the Tank Zero Level.
Table 5-2. WLS Configuration
LSL=Lower Sensor Limit
USL=Upper Sensor Limit
L
A
=Active Length
Water Zero Level (0%) is below Tank
Zero Level :
X<0
Example:
L
A
=500 mm, X = -50 mm.
LSL (0%)= -50 mm.
USL(100%) = 500 + (-50)=450 mm.
Water Zero Level (0%) is equal to Tank
Zero Level :
X=0
Example:
L
A
=500 mm, X =0 mm.
LSL (0%) = 0 mm.
USL (100%) = 500 mm.
Water Zero Level (0%) is above Tank
Zero Level :
X>0
Example:
L
A
=500 mm, X =70 mm.
LSL (0%) = 70 mm.
USL (100%)= 500 + 70=570 mm.
Tank Zero
Level
Water Zero
Level
X<0
100%
0%
Tank Zero
Level
100%
0%
Water Zero
Level
X=0
Water Zero
Level
X>0
Tank Zero
Level
100%
0%