Calibration; Sensor Screen Screening - Global Water WL15 User Manual

Chapter 4
The battery must be disconnected from the battery
strap. Note, that the WL15 will stop recording,
but will not lose any recordings or settings.
Test the battery with a voltage meter. The sensor will not work reliably if the battery voltage is below
7.5V. If the battery needs to be replaced use a 9V lithium battery for reliable service. Re-attach the battery
to the battery strap and gently slide it into the housing. Screw the cap on to the data logger housing, being
careful not to pinch any of the wires.

Calibration

The level sensor's calibration must be periodically verified. Global Water recommends checking the sen-
sor's calibration with a sounder or other measuring device once every 6 months.
Sensor Screen Cleaning
The screen on the end of the sensor must be periodically checked for clogging from mud and sludge. Wash
the screen with clean water and/or scrub it gently with a toothbrush. Do not insert objects through the
screen, as this may cause damage to the sensor.
Global Water ● (800)876-1172 ● www.globalw.com
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