Initial Operation - Lambrecht 15189 Operating Instruction

Operating Instruction
Precipitation Sensors (15189) + (15189 HL)

Initial operation

If the sensor system has been completely mounted and elec-
trically assembled, the sensor will be ready for operation.
An operational check has to be performed.
Maintenance and operational check
The precipitation sensor is nearly maintenance-free. The
sensor should be checked and cleaned periodically in order
to guarantee its proper operation, because dirt accumulation
may cause errors of measurement. The time interval of clean-
ing depends on the local conditions.
The operational check of the sensor may be performed
by the use of artificial precipitation. The volume of a 200
cm³ resp. 400 cm³ (by 4 cm³ buckets ) test container of
water must be piped into the collecting funnel through a
nozzle in such a way that the drops fall into the funnel be-
side the outlet. The nozzle of the test container (approx.
diameter 0.6 mm) should be adjusted to allow a com-
plete water run out into the funnel within 10 to 12 minutes.
After the artificial precipitation has gone through, 100 ± 2
bucket tippings should have counted.
Rinse the sensor thoroughly for cleaning. Clinging parti-
cles of dirt in the collecting funnel or outlet pipe may be
removed with a piece of wood.
If unsatisfying measurement results occur after this
cleaning procedure, the tipping bucket should be disas-
sembled for cleaning.
Absolute care must be taken not to damage the
tipping bucket!
The dismounted tipping bucket can be cleaned by placing it
in warm water with some scouring material and by carefully
scraping off unwanted dirt by using a small piece of wood.
(15189) Precipitation Sensor Operating Instructions 5