the unit calculates these values by
taking several measurements and
averaging them. Set the Speed filter
to the lowest value which gives
stable readings. The range is 1 to 30
seconds or Off (0).
Temperature The factory settings should be
sufficiently accurate for normal
usage. To calibrate the temperature
readout, first measure the water
temperature with a thermometer
known to be accurate.
Use the cursor keys to display the
temperature readout box, then
increase or decrease the value to
match the measured temperature.
The temperature can be set from
32° to 99.9°F (0° to 37.7°C) with a
resolution of 0.1° unit.
To change the units between °F
(Fahrenheit) or °C (Celsius).
Temperature filter Water turbulence
and currents cause the water
temperature to fluctuate slightly.
To give stable readings, the unit
calculates these values by taking
several measurements and averaging
them. Set the Temperature filter
to the lowest value which gives
stable readings. The range is 1 to 30
seconds or Off (0).
Keel Offset A depth transducer measures
depths below where the transducer
is mounted on the boat, usually
the bottom of the boat. The unit
calculates the depths to display by
adding the keel offset to all measured
depths.
A Have a zero keel offset to display
depths below the transducer.
B Enter a positive keel offset to
increase the shown depth. For
example to display the total depths
below the surface, enter the depth of
the transducer below the surface.
C Enter a negative keel offset to
decrease the shown depth. For
example, to display the depths of
clear water below the boat, enter
minus the depth of the deepest part
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