Lambrecht meteo 15189 Operating Instructions Manual Download Page 2

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(15189 analog) Precipitation Sensor

Operating Instructions

Operating Instructions
Precipitation Sensor (15189 analog)

Installation

Mounting of the sensor

The sensor must be mounted on a tube or pole with an outer
diameter of 60 mm. A metallic extension tube with a mini-
mum length of 100 mm is recommended, if a wooden pole
is used.
For easy adjustment place a spirit-level on the upper measur-
ing edge.

Attention!

Do not damage the measuring edge!

Place the sensor on the end of the pole until it

ts in. By us-

ing the allen key (4 mm) provided, tighten the screws in the
mounting pedestal evenly. Adjust the upper measuring edge to
an exact horizontal position. By doing this, the tipping bucket
will automatically be positioned vertically inside the device and
will work symmetrically to the collecting funnel.

Function

The weighing precipitation sensor (15189 analog)

meas-

ures the rain quantity by a tipping bucket developed by Joss-
Tognini, the bearings of which have been arranged for low
friction. Errors that normally occur due to incomplete draining
because of surface tension are automatically compensated
by the speci

c form of the tipping bucket.

The tipping bucket can hold 2 cm³ (2 g) resp. 4 cm³ (4 g) of
water. The collecting surface of 200 cm² (WMO standard)
means that one bucket charge is equivalent to a precipitation
rate of 0.1 mm resp. 0.2 mm per square meter.
If the bucket is tipped, the reed contact that is integrated in
the sensor will be closed. This signal can be sent as pulse
or analog.

The bounce-free, linearised pulse output is permanently
available parallel to an analog current or voltage output

Thus an unproblematic integration into a PLC can be carried
out.

The analog output can be deactivated for operation in
low power mode.

In this case the precipitation sensor can

be supplied separately from the signal circuit (see

g. 13) or

direct via the signal voltage (see

g. 12).

For application in snowfall regions the heated variety

(15189

analog)

is available for all-year-round measurements. Two

separate controlled heating circuits with lowest hysteresis
are providing an optimal temperature at which snowing up of
the sensor will normally be prevented and evaporation from
the heated surfaces will be minimized.

The precipitation sensor (15189 analog)

is mounted on a

pedestal that is equipped with a connection piece and are at-
tached to a tube with an outside diameter of 60 mm.

The precipitation sensor (15189 analog)

is made of weather-

resistant aluminium and stainless steel. This assures a long
durability.

Dimensional drawing

Fig. 1

Fig. 0

Mounting of the protective covering

When mounting the protective covering, please make sure
that the sign "close <-- --> open" (close < - > to) is positioned
above the

xing screw. Especially when using the heated