Campbell Scientific WINDSONIC 2-D Sonic Wind Sensors - Manual (Page 11)

WindSonic Two-Dimensional Sonic Anemometer
5. Mount the crossarm to the tripod or tower.
6. Orient the WindSonic so that the colored North marker arrows point to
True North (see FIGURE 4-1). Appendix A contains detailed information
on determining True North using a compass and the magnetic declination
for the site.
FIGURE 4-1. WindSonic mounted on a CM202 using pn 17837
Colored
North
Marker
Arrows
Pointing
North
7. Route the sensor cable along the underside of the crossarm to the tripod or
tower, and to the instrument enclosure.
8. Secure the cable to the crossarm and tripod or tower using cable ties.
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