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22 Orion 420 Weather Station
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Installing the Orion Sensor Transmitter
Site Selection:
Finding a suitable site for the sensor transmitter is important for getting representative ambient
measurements. The site should represent the general area of interest.
The sensor transmitter should be installed in a location that is free from turbulence caused by nearby
objects, such as trees or buildings.
WARNING: To protect personnel (and the device), a lightning rod should be installed with the tip at least
40 inches (one meter) above the sensor transmitter. The rod must be properly grounded, compliant with
all local applicable safety regulations.
Installing the Mounting Adapter
NOTE: The sensor transmitter must be installed to an upright, vertical position.
1. Insert the mounting adapter in the transmitter lower side as shown in the diagram above.
2. Turn the adapter firmly until you feel that it has snaped into the locked position.
3. Align the transmitter in such a way that the arrow (at the bottom of the transmitter) points to north
(see North Alignment).
4. Tighten the fixing screw to fix the adapter firmly to the mast.
North Alignment
To help the alignment, there is an arrow and text North on the bottom of the transmitter. The transmitter
should be aligned in such a way that this arrow points to the north.
Wind direction can be referred either the true north, which uses the earth’s geographic meridians, or to
magnetic north, which is read with a magnetic compass. The magnetic declination is the difference in
degrees between the true north and magnetic north.
Compass Alignment