Simrad NX45 Specifications Page 97

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Simrad NX40/45 Installation and Operation Manual 97
19-13 Setup > Calibrate
> Calibrate
Speed This calibrates the speed from a
paddlewheel sensor connected to
the unit. Calibration may be required
because different hull shapes have
different flow characteristics.
Note: for accurate calibration, The
speed from a GPS receiver should be
greater than 5 knots, and the speed
from another paddlewheel transducer
should be between 5 and 20 knots.
Best results are achieved in calm
conditions where there is minimal
current (best at high or low tide).
Calibrating speed Travel at a constant, known
speed.
To calibrate speed
Speed >
> change shown speed to the true value >
Speed filter
Waves and wind cause the boat speed
from the paddlewheel transducer
to fluctuate slightly. To give stable
readings, 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).
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