GHM Delta OHM HD215, Руководство по эксплуатации

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HD2015
- 6 -
V1.2
3 INSTALLATION
The rain gauge is supplied already calibrated at 0.1 - 0.2 or 0.5 mm of rain per tip of
the bucket: the calibration value is shown on the instrument label.
The instrument must be installed in an open area, away from buildings, trees, etc.,
ensuring that the space above is free from objects which may obstruct the rain meas-
urements and placed in an easily accessible position for periodical cleaning of the fil-
ter.
Avoid installations in areas exposed to wind gusts, turbulences (for example on the
top of a hill) as they may distort the measurements.
The rain gauge can be installed on the ground or 500 mm off the ground. Other sizes
of the support for installation off the ground are available upon request.
For the installation on the floor, three adjustable support feet are supplied, so that the
instrument can be levelled correctly, and also proper holes for a possible fixing on a
floor.
For installations off the ground, a flange to be fixed to the base of the instrument,
where the support clamp must be inserted, is supplied; the clamp ends either with a
flange so that it can be fixed to the floor, or with a tip to be driven into the ground.
For the various fastening systems please refer to the figures 5, 6, 7 and 8.
In order to make the tipping device properly working and the measurements correct,
it is important that the instrument is placed perfectly levelled. The base of the rain
gauge is fitted with a bubble level.
For the installation, unscrew the three screws from the base of the cylinder that sup-
ports the water collector cone (see fig. 2). A heating resistor is placed around the
cone in the
HD2015R version. The heater is automatically disconnected when the
cone is lifted up.
3.1 E
LECTRICAL CONNECTIONS
For the version without heating system, use a 2-wire cable with 0.5 mm
2
minimum
wires section ; for the version with heating system, use a 4-wire cable with 2.5 mm
2
minimum wires section . Use a shielded cable over long distances. Slide the cable
through the cable gland and fasten it with the cable fastener located near the entry
hole, at the base of the rain gauge.
Unscrew the terminal block protection cover and perform the connections as shown in
figure 2.
The rain gauge output, indicated in point 1 of the drawing below,
must be connected to the input of the HD2013-DB rain gauge data logger
(please see the details in the manual of the data logger) or to a pulse counter or to
a data logger .
The heated version requires power for the resistors (12 Vdc or 24 Vdc depending on
the version supplied): perform the connection as indicated at point 2 of fig. 3.
If the connections are correctly set, the LED placed near the terminals will be lit up.