Calibrating Nmea Depth, Speed And Water Temperature Data - Furuno GP-7000F Installation Manual

3.5 Calibrating NMEA Depth, Speed and Water
Temperature Data
NMEA speed, depth and water temperature data may be corrected from the GP-7000F if
they cannot be done from the equipment that outputs the data. Enter a minus value if the
actual value is lower than the NMEA data, or a plus value if the actual value is higher than
the NMEA data. For example, if the actual water temperature is 20° and the water
temperature data output by the sensor is 17°, enter +3(°).
1. Press the [MENU] key to show the menu bar.
2. Rotate the [ENTER] knob to choose ADVANCED from the menu bar and then push the
[ENTER] knob.
3. Rotate the [ENTER] knob to choose EXT NMEA and then push the [ENTER] knob.
4. Rotate the [ENTER] knob to choose appropriate item.
DRAFT SETUP: Enter ship's draft to get NMEA depth from sea surface (instead of
transducer). To get depth from hull bottom, measure distance between bottom of
transducer and hull bottom and enter that value with a minus.
SPEED CALIBRATION: Find correct speed from known source and enter offset to
correct NMEA speed indication.
TEMP CALIBRATION: Find correct water temperature from known source and enter
offset to correct NMEA water temperature indication.
5. Push the [ENTER] knob. The cursor is selecting the plus sign (or minus sign). If it is
necessary to switch from plus to minus or vice versa, rotate the [ENTER] knob to
choose plus or minus and then push the [ENTER] knob. If not necessary, go to step 6.
6. Push the [ENTER] knob, rotate the [ENTER] knob to set digit and then push the
[ENTER] knob. To clear a line of data, press the [CLR FLD] soft key, which is the third
key from the left of the keys below the screen.
Setting range
Draft setup: -20 - +39.9(ft)
Speed calibration: -50 - +50(%)
Temp calibration: -50 - +50(°F)
7. Set other digits as you did in step 6.
8. Press the [SAVE] soft key, which is the fourth key from the left of the keys below the
screen.
9. If necessary, repeat step 4-8 to choose and set another calibration item.
10. Press the [MENU] key to close all open windows and erase the menu bar.
DRAFT SETUP
SPEED CALIBRATION +00 %
TEMP CALIBRATION +00.00 ° F
EXT NMEA menu
33
+00.0 Ft