Chapter 4 ________________________________________________________________ Installation
VAISALA________________________________________________________________________ 21
3.
Tighten the fixing screw on the bottom of the transmitter when the
bottom arrow is exactly aligned to north.
Wind direction correction
Make a wind direction correction in case the WXT510 cannot be
aligned in such a way that the arrow on the bottom points to the north.
In this case, the deviation angle from the true north should be given to
the WXT510.
1.
Mount the transmitter to a desired position, see Mounting, page 17.
2.
Define the deviation angle from the north-zero-alignment. Use the
±
sign indication to express the direction from the north line (see
example pictures).
3.
Feed the deviation angle to the device by using the wind message
formatting command aWU, D (direction correction), see page 64.
4.
From now on, the WXT510 transmits the wind direction data by
using the changed zero-alignment.
NORTH
NORTH
-30
°
+30
°
Deviation angle +30
°
Deviation angle - 30
°
NORTH
zero-alignment
