NorthStar Navigation NorthStar 8000i - Manual (Page 120)

120 Northstar 8000i Operation Manual
19.2 Change the water temperature offset
If there's a difference between the displayed water temperature and the actual
water temperature, you can enter an offset to adjust the water temperature
readouts to the correct level. The default offset is 0 (0°).
To change the offset for the water temperature:
1. Select
Display from the top of the screen.
2. Select Setup from the control panel.
3. Select
+ Sounder to display a list of sounder specification options.
4. The
Water Temperature Offset button shows the current
setting. Select Edit, then enter the difference between the displayed
water temperature and the actual water temperature. The difference
must be within -10 to 10. If you want to check or change the
temperature units, (see "Select the temperature units" page 31).
5. The new setting is applied immediately to all the Sounder screens.
6. When you are finished, select – Sounder.
19.3 Change the water temperature averaging time
The water temperature sensor usually displays a readout every two seconds.
If you'd prefer to see the readout averaged out over a different time period, use
this setting to specify the time period.
To change the water temperature averaging time:
1. Select
Display.
2. Select Setup from the control panel.
3. Select
+ Sounder to display a list of sounder specification options.
4. The
Water Temperature Averaging button shows the
current time period in seconds. Select Edit, then enter the time period
between temperature readouts. This can be a minimum of one second
and a maximum of 30 seconds.
5. When you are finished, select – Sounder.
19.4 Change the sounder's speed offset
If there's a difference between the displayed speed and the actual speed, you can
enter an offset to adjust the speed readouts to the correct level. The default offset
is 0.
You'll need to obtain an accurate measurement of your vessel's speed. You can
use a GPS receiver when you're travelling faster than 5 knots, follow another vessel
travelling at a known speed between 5 knots and 20 knots, or make a timed run
over a known distance.
Best results are obtained in calm conditions where there is minimal current.
To change the speed offset:
1. Select
Display.