11
Choosing the Mounting Location
For accurate readings and a reliable GPS signal, selecting the best location for
the WeatherStation Instrument is very important. Easy access and appearance
should be secondary considerations. Since each installation is unique, the best
separation distances will vary depending on the surroundings and the particular
equipment and how it is configured. Choose a location that balances the
requirements below:
•
The WeatherStation Instrument must be mounted in “clear air”, away from
obstructions in any direction that will interfere with air flowing through the unit.
If
there is an obstruction, be sure to mount the WeatherStation Instrument at least
2m (6') away. On land, avoid obstructions such as roofs, chimneys, trees, etc.
• If possible, mount the WeatherStation Instrument higher than any other object.
Mount it a minimum of 500mm (20") above the surrounding surfaces.
NOTE
: The higher the WeatherStation Instrument is mounted, the less accurate
the pitch and roll readings will be.
• To prevent interference to the internal magnetic compass:
- Mount a minimum of 0.3m (1') from other standard and steering compasses.
- Mount a minimum of 1m (3') from any structures or equipment that contains
ferrous metals.
- Mount a minimum of 1m (3') from anything that may create a magnetic field
such as magnetized materials, electric motors, electronic equipment,
engines, generators, power/ignition cables, and batteries. For distances,
follow the respective manufacturer’s recommendations.
• To prevent interference to the internal GPS (Figure 2):
- It must have a clear view of the sky to receive satellite signals. A 120° view is
optimal. Check for any obstructions such as other boats or buildings.
- Mount it as far as possible from high-powered transmitting antennas to avoid
mutual interference.
- Mount it lower than any Inmarsat communications antenna.
- Mount above or below any radar beam.
Do not mount within a radar beam
.
Min. 2m
antenna insulator
metal surface
1.5m
Min.
Min. 2m
WeatherStation
Figure 2. Antennas
