Lufft VENTUS-UMB - North Alignment

Operating Manual V25/09.2019 Ventus / Ventus-X / V200A
Chapter 9 Installation 15
9.2 North Alignment
In order for the wind direction to display correctly, the sensor must be aligned to the North. The
sensor has a number of directional arrows and a North drill hole for this purpose.
Figure 4 North Markings
Procedure:
 If the sensor is already installed, first loosen both nuts evenly until you can turn the sensor
easily
 Using the compass, identify the North and fix a point of reference on the horizon
 Position the sensor in such a way that the South and North sensors are in alignment with the
fixed point of reference in the North
 Tighten both nuts evenly
Figure 5 Alignment to North
poor
good
Note: As the magnetic North Pole indicated by the compass differs from the Geographic North
Pole, account must be taken of the declination (variation) at the location when aligning the
sensor.
Depending on the location, the variation can be more than 15° (in North America for example).
In Central Europe the variation can be largely ignored at present (< 3°). You can find further
helpful information on this subject on the Internet.
Point of reference in the North