Xylem WL400 WATER LEVEL SENSOR - Manual (Page 12)

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XI. Appendix A: Calibration Procedures
Step 1) Turn on the power supply and the current meter.
Step 2) Record the output current of the sensor, I
L
= _______.
Step 3) Place the water level sensor into the column of water.
Step 4) Record the depth of the sensor (the distance from the tip of the
sensor to the top of the column of water, W = _______, and
record the output current of the sensor, I
H
= _______.
Step 5) Subtract I
L
from I
H,
I
H
- I
L
= _______ = C.
Step 6) Find the maximum current output for the sensor. (C/W)(Max
Range of sensor)+ I
L
= _____ = Output current.
Step 7) Use these new current values to recalibrate the system that is
monitoring the sensor output.