B&G H2000 Pilot *DISCONTINUED* - Manual (Page 84)

h2000 User Manual
84 HB-0845-06
In the case of multiple speed sensors the h2000 will always
use the calibration value for the selected sensor; this is
determined by the system based on user choice of heel, wind
angle or a combination of the two.
3.2.2 Preparation for Log Calibration
Before calibrating the log you should ensure that the
underwater unit is correctly aligned as follows:
Sonic Speed: Check that the unit is operating
correctly.
Ultrasonic Speed: The notch on the transducer is
located in the cut-out in the housing.
Paddle-Wheel: The moulded arrows on top of the
unit must be pointing forward along the fore and aft
line of the hull. The unit must also be totally free of
any weed or other fouling.
3.2.3 Calibration Runs
Consecutive runs, under power at a constant speed, should
be made along the given course. To eliminate the effect of
tidal conditions, it is advisable to perform at least two runs,
preferably three, along the measured course. There are three
available options for calibrating the log, Automatically
(AUTO CAL), Manually (MANL CAL) or to a Reference
speed (REF CAL).
3.2.4 Log AUTO CAL Facility
This facility enables the user to calibrate the yacht's log
accurately and simply. Calculations are performed by the
h2000 computer. Referring to Figure 8, A and B are the
markers for each run and X is the actual distance for each
run as ascertained from the chart.