NorthStar 972 Quickstart Manual And Reference Manual page 117

The temperature graph's units and
scale
You can change the highest and lowest
water temperatures that will be displayed
on the temperature graph (settings can
range from 32°F to 100°F):
Transducer calibrations
These functions are set during installation
and should not be changed unless they are
known to need adjustment.
The 50 kHz and 200kHz calibrations are
used to equalize the signal strengths of the
two frequencies.
Demo mode
To activate Demo mode, see Using demo
mode, on page 107.
Reference Manual Revision B
1. Press the Cursor pad up or down to highlight
the temperature scale option.
Edit
2. Press .
3. Press the Cursor pad up or down to highlight
°C or °F, as desired.
4. To change the endpoints of the scale, press
the CURSOR PAD to the right.
5. Enter two digits for the lower temperature limit
using the keypad.
6. Enter two digits for the upper limit.
7. Press ENTER.
Speed and temperature sensor setup
These functions are set during installation
and should not be changed unless they are
known to need adjustment.
To simplify operation, the "sensor installed"
options can be set to "No" to remove all
references to temperature and speed from
all the screens.
Highlight the appropriate line and press
Edit to change the option.
Speed calibration is entered as a percentage
from –99% to +99% to make the speed
read lower or higher than the uncalibrated
value.
NOTE:
You must enable the speed setting under
the Data menu on the Echo Sounder
screen.
Temperature is calibrated by entering the
temperature error as a number of degrees
from –9.9 to +9.9. This offset is added to
the uncalibrated temperature before it is
displayed or graphed.
Reference section 7 — Echo sounding
Echo Sounder setup
113