(15189 analog) Precipitation Sensor
Operating Instructions
Operating Instructions
Precipitation Sensor (15189 analog)
Electrical connections
The sensor will be connected to the cable by leading the cable
through the conduit gland to the connector inside the sensor
housing. The recommended cable type is:
(2) (4) x AWG 2O CU L sw;
diameter approx. 5.1 mm
The cable should be not longer than 11 m.
When the cable is transferred inside the soil it is
recommended to protect the cable with a protecting
plastic tube.
(15189 H analog) Version with heating
The precipitation sensor (15189 H analog) comes with a
solid-state-thermostat controlled heating for collecting funnel
and drain pipe.
Electrical connections
For the connection of the heating a 2-core cable is required,
which has to apply and connected to the power supply unit
according to the
connecting diagrams
with heating.
The
function of the heating elements
can be tested also at
ambient temperatures above the control temperature of the
solid-state thermostat. For this simple test a regular magnet
has to be held close to the blue housing of the switching cir-
cuit. When reaching a surface temperature of approximately
50 °C the current will be switched off.
Both blue thermostat modules are
fi
tted internally on the funnel
surface as well on the bottom of the housing.
The operational conditions will be indicated with colored light-
emitting diodes (LED) an the thermostatic module:
Initial operation
If the sensor system has been completely mounted and
electrically assembled, the sensor will be ready for operation
according to the sensor settings. The operational check has
to be performed.
Maintenance and operational check
The precipitation sensor (15189 analog)
is nearly main-
tenance-free. The sensor should be checked and cleaned
periodically in order to guarantee its proper operation, since
dirt accumulation may cause errors of measurement. The time
interval of cleaning depends on the local conditions.
The
operational check
of the sensor may be performed by
the use of arti
fi
cial precipitation. The contents of a 200 cm³
resp. 400 cm³ (by 4 cm³ buckets ) test container of water must
be conducted into the collecting funnel through a nozzle in
such a way that the drops fall into the funnel beside the outlet.
The nozzle of the test container (approx. diameter 0.6 mm)
should be adjusted to allow a complete water run out into the
funnel within 10 to 20 minutes.
After the arti
fi
cial precipitation has gone through, 100 ± 2
bucket tippings should have been counted.
Rinse the sensor thoroughly for cleaning. Clinging particles
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 disassembled for
cleaning.
Please take care 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 using a small piece of wood.
Warranty
Please note the loss of warranty and non-liability by unau-
thorised manipulation of the system. You need a written
permission from LAMBRECHT meteo GmbH for changes
of system components. These activities must be operated
by a qualifi ed technician.
The warranty does not cover:
1. Mechanical damages caused by external impacts (e. g.
icefall, rockfall, vandalism).
2. Impacts or damages caused by over-voltages or elec-
tromagnetic
fi
elds which are beyond the standards and
speci
fi
cations in the technical data.
3. Damages caused by improper handling, e. g. by wrong
tools, incorrect installation, incorrect electrical installation
(false polarity) etc.
4. Damages which are caused by using the device beyond
the speci
fi
ed operation conditions.
green
red
green:
supply voltage
red:
heating on
Fig. 4
4
TIP
