Sperry Marine NAVIKNOT 600 SD, Operation, Installation And Service Manual

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NAVIKNOT 600 SD 056353/J
Doppler Transducer Calibration 7-5
Automatic Entry
With the automatic entry method, the required zero point setting is
determined automatically. Automatic entry may only be used when the
vessel is stationary in waters free of current, i.e., if the actual water
speed is known to be zero.
To carry out the automatic zero-point calibration:
1. Go to page 2 of the Service Setup;
select the Calibration | Zero Point | Auto Calibration sub-menu.
As with the manual entry method, the true speed, the uncalibrated
speed and the calibration value are shown.
However, the true speed value is fixed to zero knots and cannot be
adjusted by the operator. The uncalibrated speed is the raw speed
value as currently received from the preamplifier D, thus the calibra-
tion value will be equal to the uncalibrated speed with the sign
reversed.
2. Press
ENTER
to confirm
the setting and leave the
auto calibration sub-
menu.
SERVICE SETUP Page 2
CALIBRATION
ZERO POINT
MAN CALIBRATION
+00.0
+00.2
-00.2
KN
KN TRUE SPEED
UNCAL SPEED
CAL VALUE