Tuning A Non-Garmin Drive Unit; Testing The Steering Direction; Selecting The Speed Source; Verifying The Tachometer - Garmin GHP 12 Autopilot System Installation Instructions Manual

tuning a non-Garmin Drive unit
NOTE: This does not apply to a solenoid drive unit.
If you installed a non-Garmin drive unit, you must calibrate the drive
unit for use with the GHP 12.
1. Center the rudder position, let go, and select Continue.
The autopilot will take control of the rudder as it tunes the drive
unit.
2. When the process is complete, select Done.
If you encounter an error during the tuning process, repeat the
tuning procedure.
NOTE: If needed, you can further refine the tuning later
testing the Steering Direction
1. Use the arrows on the GHC 10 to test the steering direction.
When you select the right arrow, the rudder should turn so that the
boat would steer to the right, and when you select the left arrow, the
rudder should turn so that the boat would steer to the left.
2. Select Continue.
3. Select an option:
• If the steering test turns the boat in the correct direction, select
Yes.
• If the steering test turns the boat in the opposite direction, select
No.
4. If you selected No in step 3, repeat steps 1–2.
Selecting the Speed Source
NOTE: This procedure applies only to power planing hull and power
displacement hull vessel types. It will not appear when configuring the
GHP 12 for a sailboat.
Select an option:
• If you connected a NMEA 2000-compatible engine (or engines)
to the NMEA 2000 network, select NMEA 2000.
• If you did not connect a NMEA 2000-compatible engine (or
engines), select the engine (or engines) to which you connected
the tachometer sensor from the CCU.
◦ For a single-engine boat, select Tachometer - Analog Port,
or Tachometer - Analog Starboard, according to how you
connected the tachometer wiring.
• If tachometer data is unavailable or unusable, select GPS data
as a speed source.
◦ When GPS data is used as a speed source, the maximum
speed for all vessel types must be configured.
• If you did not connect a speed source, select None.
◦ If the autopilot does not perform well using None as the
speed source, Garmin recommends connecting a tachometer
or GPS as the speed source.
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Verifying the tachometer
NOTE: This procedure applies only to power planing hull and power
displacement hull vessel types. It will not appear when configuring the
GHP 12 for a sailboat.
This procedure does not appear if GPS or None is selected as the speed
source.
1. With the engine (or engines) running, compare the RPM readings on
the GHC 10 with the tachometer (or tachometers) on the dashboard
of your boat.
2. If the values do not match, use the arrows to adjust the Pulses Per
Rev values.
(page 20).
NOTE: When you adjust the Pulses Per Rev with the arrows, there
is a delay before the new RPM readings appear on the GHC 10.
Ensure you wait until the GHC 10 adjusts to the new reading for
each adjustment.
Reviewing the Results of the Dockside Wizard
The GHC 10 displays the values you chose when you ran the Dockside
Wizard.
1. Examine the results of the dockside wizard.
2. Select any incorrect value and select Select.
3. Correct the value.
4. Repeat steps 2 and 3 for all incorrect values.
5. When you are finished reviewing the values, select Done.
GHP 12 Installation Instructions