Garmin GHP 20, Installation Instructions Manual

Page: 13 / 20

GHP 20 Installation Instructions 13
2. Turn the boat in one direction using the autopilot and observe the
behavior.
The boat should turn smoothly, not too quickly or too slowly.
When you turn the boat using the autopilot, the boat should
approach and settle on the desired heading with minimal overshoot
and oscillation.
3. Select an option:
• If the boat turns too quickly or too sluggishly, adjust the
autopilot acceleration limiter ( page 13 ).
• If the heading hold oscillates significantly or the boat does not
correct when turning, adjust the autopilot gain ( page 13 ).
• If the boat turns smoothly, the heading hold oscillates only
slightly or not at all, and the boat adjusts the heading correctly,
proceed to step 5.
4. Repeat steps 2 and 3 until the boat turns smoothly the heading hold
oscillates only slightly or not at all, and the boat adjusts the heading
correctly.
5. For planing vessels, repeat steps 1–4 at faster speeds ( page 13 ).
adjusting the acceleration Limiter Settings
NOTE: When you manually adjust the acceleration limiter, make
relatively small adjustments. Test the change before making additional
adjustments.
1. Turn on the GHP 20 using the advanced configuration procedure
( page 13 ).
2. On the GHC 10, select Menu > Setup > Dealer Autopilot
Configuration > Autopilot Tuning > Acceleration Limiter .
3. Select an option:
• Increase the setting if the autopilot turns too quickly,
• Decrease the setting if the autopilot turns too slowly.
4. Test the autopilot configuration.
5. Repeat steps 2 and 3 until the GHP 20 performance is satisfactory.
adjusting the autopilot Gain Settings
NOTE: When you manually adjust the rudder gain (or counter gain),
make relatively small adjustments, and adjust only one value at a time.
Test the change before making additional adjustments.
1. Enable the advanced configuration procedure (
page 13 ).
2. On the GHC 10, select Menu > Setup > Dealer Autopilot
Configuration > Autopilot Tuning > Rudder Gains .
3. Select an option:
• Select Low Speed or High Speed and use the arrows on the
GHC 10 to adjust how tightly the rudder holds the heading and
makes turns at low speed or high speed.
If you set this value too high, the autopilot may be overactive,
attempting to constantly adjust the heading at the slightest
deviation. An overactive autopilot can cause excess wear and
tear on the drive unit, and drains the battery at a faster-than-
normal rate.
• Select Low Speed Counter or High Speed Counter to adjust
how tightly the rudder corrects the turn overshoot. If you set this
value too high, the autopilot can overshoot the turn again when
attempting to counter the original turn.
4. Test the autopilot configuration.
5. Repeat steps 2 and 3 until the GHP 20 performance is satisfactory.
advanced Configuration Procedure
Advanced configuration options are not available on the GHC 10 under
normal conditions. To access the advanced configuration settings of the
GHP 20, enable the advanced configuration procedure.
Enabling the advanced Configuration Procedure
1. From the heading screen, select Menu > Setup > System > System
Information .
2. Press and hold the center soft key
➊
for 5 seconds.
Dealer Mode appears.
➊
3. Press Back > Back .
If the option for Dealer Autopilot Configuration is available on the
Setup screen, the advanced configuration procedure is enabled.
advanced Configuration Settings
You can run the Autotune automated configuration process, calibrate the
compass, and define north on the GHP 20 through the GHC 10 without
running the wizards. You can also define most settings individually,
without running the configuration processes.
Manually Running the automated Configuration
Procedures
1. Enable the advanced configuration procedure ( page 13 ).
2. From the Heading screen, select Menu > Setup > Dealer Autopilot
Configuration > Automated Setup .
3. Select Autotune , Calibrate Compass , or Set North .
4. Follow the on-screen instructions.
Manually Running the Sea trial Wizard
The Sea Trial Wizard allows you to quickly define all of the important
configuration settings on the GHP 20. After running the wizard, if
you do not feel the GHP 20 is working correctly, you can run the
wizard again at any time. To access the wizard, enable the advanced
configuration procedure ( page 13 ).
Manually Defining Individual Configuration Settings
1. Enable the advanced configuration procedure ( page 13 ).
2. From the Heading screen, select Menu > Setup > Dealer Autopilot
Configuration .
3. Select the setting category.
4. Select a setting to configure.
Descriptions of each setting are available in the appendix (
page 16 ).
5. Configure the value of the setting.
NOTE : Configuring certain settings in the dealer autopilot
configuration procedure may require you to modify other settings.
Review the GHP 20 Configurations Settings section ( page 16 ) prior to
modifying any settings.