Raymarine i70 Installation & Operation Instructions page 39

1. Select the device that the transducer(s) you are
calibrating are connected to.
A list of available transducer data is displayed,
2. * Select Speed.
Important: * Step only applicable to iTC-5.
3. Select Speed Calibration.
4. Select Advanced.
5. Select Adjust Calibration.
6. Select Start.
The current Calibration Table is displayed.
7. Select the relevant Calibration Point from the
table.
8. Select Options.
9. Select Add cal point.
10. Use the Up and Down buttons to adjust the
displayed Log Speed to match SOG, if available
or to match your estimated actual speed.
11. Select Add.
12. Select Ok.
13. Repeat steps 7 to 11 for each Calibration Point
you want to add.
The more Calibration Points the higher the
accuracy of Log Speed.
Note: If the text appears red then the new reading
deviates too far from the stored reading. You will
need to add a Calibration Point closer to the stored
reading a try again.
Editing a Calibration Point
Existing Calibration Points can be manually edited.
From the Advanced Menu:
1. Select Adjust cal table.
2. Select Start.
3. Highlight the relevant Calibration Point from the
table.
4. Select Options.
5. Select Edit cal point.
The Calibration Point Adjustment page is
displayed.
6. Use the Up and Down buttons to adjust the
Calibration Factor for the selected speed to
match your new Calibration Factor.
7. Select Done to return to the Calibration Table.
8. Repeat steps 4 to 7 for all Calibration Points that
require adjustment.
9. Select Finish when all of the required Calibration
Points have been adjusted.
Deleting a Calibration Point
Calibration Points can be deleted from the Calibration
Table.
From the Adjust cal table menu:
1. Select Start.
2. Highlight the Calibration Point you want to delete.
3. Select Options.
Transducer calibration
4. Select Yes to delete.
The Calibration Point is deleted from the
Calibration Table.
Resetting the Calibration Table
The Calibration Table can be reset to factory default
values by following the steps below:
From the Advanced Menu:
1. Select Reset to defaults.
2. Select Yes.
3. Select Ok.
The Calibration Table is reset to factory default
values.
Entering a new Calibration Table
A new Calibration Table can be added manually. The
new Calibration Table replaces the existing table
which is deleted. This is useful when you have been
provided a specific calibration table for your hull type.
Note: You will need to work out your Calibration
Factors for each Calibration Point before you can
create the new Calibration Table.
From the Advanced Menu:
1. Select Enter new cal table.
2. Select Start.
All existing Calibration Points are deleted and you
will be prompted to enter new Calibration Points.
3. Use the Up and Down buttons to select the
desired speed that you want to add a Calibration
Point for.
4. Select Next.
5. Use the Up and Down buttons to adjust the
Calibration Factor to the correct value.
6. Select Done.
7. Select Add to add the next Calibration Point.
8. Repeat steps 3 to 7 for all Calibration Points you
want to add.
9. Select Finish when all Calibration Points have
been added.
10. Select OK.
47