Chapter 4: Calibration 31
5. At the end of the outward leg, press the trip button again so that:
•The text RETURN is flashing at the top of the screen.
• The displayed distance freezes. Note that this value may not be the same
as the measured distance, due to errors introduced by tidal flow.
6. Turn the vessel round, start the return leg and as you do so, press the
trip but-
ton so RETURN stops flashing and the displayed value increments.
7. At the end of the return leg, press the
trip button. At this point:
•The text START 2 alternating with the new calibration factor is dis-
played at the top of the screen.
• The displayed distance freezes. This value should be very close to the
actual (measured) distance of the calibration run.
8. Carry out one of the following actions:
• If you are satisfied with the results of the first calibration run, press the
speed and trip buttons together, to store the new calibration factor, exit
speed calibration and return to the Instrument status screen.
Speed calibration, sheet 2
Complete the
outward leg of
the second cal run
Complete the
return leg of
the second cal run
trip
trip
At the start of the
return leg press
At the end of the
outward leg, press
At the end of
the return leg
press
speed
Press
+
trip
to save the
cal factor
Exit to Instrument
status display
(Intermediate
calibration)
trip
trip
From sheet 1
Speed calibration
is now complete
D8155-1
81261_1.book Page 31 Tuesday, November 29, 2005 12:42 PM
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