User’s Guide ______________________________________________________________________
50 __________________________________________________________________ M211840EN-C
Wind direction can be referred either to true north, which uses the
Earth’s geographic meridians, or to the magnetic north, which is read
with a magnetic compass. The magnetic declination is the difference in
degrees between the true north and magnetic north. The source for the
magnetic declination should be current as the declination changes over
time.
0003-011
Figure 26
Sketch of Magnetic Declination
Compass Alignment
To align a transmitter:
1.
If the transmitter is already mounted, loosen the fixing screw on the
bottom of the transmitter so that you can rotate it.
2.
Use a compass to determine that the transducer heads of the
transmitter are exactly in line with the compass and that the arrow
on the bottom of the transmitter points north.
3.
Tighten the fixing screw.
