La Crosse Technology Family Weather Station Instruction Manual page 49

The Rain Sensor
For best results, the rain sensor should be securely mounted onto a horizontal surface
about 1 meter above the ground and in an open area away from trees or other
coverings where rainfall may be reduced causing inaccurate readings.
When securing into place, check that rain excess will not collect and store at the base
of the unit but can flow out between the base and the mounting surface (test by
pouring clean water).
After mounting the rain sensor, connect the cable to the thermo-hygro sensor at the
corresponding socket so power supply can be received and data be transmitted to the
base station
The rain sensor is now operable. For testing purposes, very slowly pour a small
amount of clean water into the rain sensor funnel. The water will act as rainfall and will
be received and displayed at the base station after about 2 minutes delay i.e. when
the reading interval is reached.
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