B&G H2000 Pilot *DISCONTINUED* - Manual (Page 96)

h2000 User Manual
96 HB-0845-06
This is why we recommend that the last thing you touch is
the Measured Wind Speed. It is calibrated in the factory
where wind tunnel calibrated units are available, and
apparent inaccuracies are 99% attributable to effects such as
wind gradient, rather than to a basic calibration problem.
3.3.2 Measured Wind Angle (MWA) Calibration
To discover the MWA alignment error we can employ one
of two techniques. The first is simply to go head to wind
and read the value of the Measured Wind Angle. If it reads
anything other than 0, you have an error. If the error is
greater than 0 (up to 180 degrees), you should subtract the
error from 0 and enter this as the calibration value. So if
when you go head to wind the measured wind angle reads 4
degrees, then you should enter -4 as the calibration value. If
it is less than 0 then the opposite applies.
The second method involves a sailing trial as shown in
Figure 9 - Masthead Unit Alignment.
1. Whilst monitoring MEAS W/A on a display, sail
upwind at the optimum close-hauled angle.
2. When conditions are steady, write down the mean
MEAS W/A reading.
3. Tack the vessel and sail at the optimum close-
hauled position as before.
4. When conditions are again steady, write down the
mean MEAS W/A reading.
5. Repeat steps (1) to (4) inclusive at least two or
three times to obtain an average MEAS W/A for
each tack.
6. Half the difference between the two Measured
W/A’s needs to be applied to the MHU OFFSET.
If STBD is greater than PORT, then subtract half
the difference.
WIND
→
MEAS W/A, CALBRATE
→ → → →
MHU ANGL