GHM Delta OHM HD52.3D Series, Руководство по эксплуатации

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HD52.3D…
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V2.2
For version with rain gauge option it is reccommended to place the instrument at a height not
exceeding 3 m (the precipitation measurement is standardized at ground level, as it is very af-
fected by the presence of wind). It is very important to place the instrument on a rigid mast,
as the oscillation of the mast could cause false detections of the tipping bucket of the rain
gauge.
For open-space installations, the instrument can be installed using the tripod HD2005.20
(2
m) or HD2005.20.1 (3 m).
If the instrument is installed on a building, the height of the instrument should be at least 1.5
times the minimum value between the height of the building and the roof longest diagonal.
Mount the instrument far from magnetic materials and devices that generate magnetic fields
(electric motors, electric power cables, electric transformers, radars, radio transmitters etc.) in
order to prevent faulty indications from the magnetic compass.
In case of mobile installations (for example on a boat), take into account that the instrument
measures the relative (apparent) wind speed with respect to the instrument. To determine the
absolute (real) wind speed one should consider the movement velocity of the instrument.
All instrument sensors are factory-calibrated and do not require additional interventions of the
user.
Unless otherwise requested, with factory settings the instrument starts in configuration mode
at power up and stands in waiting to receive the commands for the setting of the operating pa-
rameters through a RS232 serial connection. To know the available configuration parameters,
the related factory settings, the commands to modify the parameters and to select the operat-
ing mode, see Chapter 6 “CONFIGURATION”. If, however, the instrument is already set to op-
erate in one of the available operating modes (SDI-12, NMEA, MODBUS-RTU, proprietary
RS232, proprietary RS485), the set mode will be active 10 seconds after power up.
5.1 A
LIGNMENT OF THE INSTRUMENT
The instrument is equipped with a magnetic compass, and wind speed and direction measure-
ments are automatically compensated and referred to magnetic North, even if alignment to
North is not performed. This allows obtaining accurate measurements even in case of mobile
installations.
It is possible to disable the compass compensation of the wind speed and direction measure-
ments. In this case it is necessary to align the instrument during installation. The arrows on
the case will facilitate the alignment.
Arrow for
alignment
to North
Supporting plate
of ultrasonic sensors