aem.eco
LAMBRECHT meteo
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AEM
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15189
page
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6
Electrical connection
The sensor will be connected to the cable by leading the cable through the conduit gland to the connector inside the
sensor housing. Recommended cable type:
2 (4) x AWG 2O CU L sw;
diameter approx. 5.1 mm
The cable should not be longer than 11 m.
When the cable is transferred inside the ground it is recommended to protect the cable with a protecting
plastic tube.
USE OF THE BOUNCE-FREE OUTPUT SIGNAL (SEE FIGURE PAGE 8)
The usual circuit of the precipitation sensors is suitable for connection to data loggers without an own bounce-free
impulse input. For this application the clamps 3 and 4 are used.
Make sure, that the current supply for the precipitation sensor with usual circuit is not less than 100 µA (see also
technical data).
USE OF THE DIRECT OUTPUT SIGNAL (SEE FIGURE PAGE 9)
This circuit variant of the precipitation sensors is suitable for connection to data loggers with a bounce-free impulse
input. For this application the clamps 1 and 6 are used. In this case the current supply of the electronics with 100 µA
is not necessary. The LAMBRECHT meteo data logger TROPOS is equipped with such a bounce-free input. Thus the
direct output signal of the reed contact is used. An additional benefit is a low-current effect.
VERSION WITH HEATING 15189 H
Version i. e. with a controlled 2-circuit heating for collecting funnel and drain pipe.
ELECTRICAL CONNECTION OF THE HEATING
For the connection of the heating a 4-core cable is required, which has to apply and connect 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 circuit. When reaching a surface temperature of approximately 50 °C the current will be switched off.
Both blue thermostat modules are fitted internally on the funnel surface as well
as on the bottom of the housing. The operational conditions will be indicated
with colored light-emitting diodes (LED) on the thermostatic module:
green:
supply voltage
red:
heating on
red
green