Display Control Calibration Alc-1 - Lectrotab ALC-1 Manual

Display Control Calibration ALC-1

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Calibrating the Display:
For the automatic leveling system to function properly, the trim tab type, position and electrical current draw
must be known. This information is automatically acquired and stored in memory during calibration.
1. Turn battery selector switch ON to apply supply voltage to ALC-1 display. If optional terminal 7 is used,
turn the ignition key to the run position to activate the control.
2. The AUTO indicator should be blinking to indicate the device needs calibrating.
3. Press and hold the Bow Down (top button) and Bow Up (bottom button) simultaneously for 12 seconds
while the control calibrates by running the trim tabs to the fully retracted and deployed positions. The
calibration may take up to 60 seconds and should not be interrupted.
4. Once calibration is completed, the AUTO LED indicator will stop blinking. The port and starboard tab
level LED indicators will now be lit. The port tab indicators will be shown on the left bar and starboard
on the right bar.
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Verify Connection and Operation:
1. IMPORTANT! After calibration, verify the connection by pressing the buttons one by one and observing
the trim tabs.
2. Press and hold the top button "Bow Down". Both trim tabs should deploy downwards.
3. Press and hold the bottom button "Bow Up". Both trim tabs should retract upwards.
4. If the tab or tabs are moving in the opposite direction as described, switch the two actuator wires from
the actuator that moves in the wrong direction (move 3 to position 4 and 4 to position 3 for port
actuator) at the 7 pin plug, and switch 5 and 6 in the same manner for the starboard actuator and
repeat the testing process.
5. Press the left button "Port Down" and the port trim tab should retract upwards, and the starboard trim
tab should deploy downwards.
6. Press the right button "Starboard Down" and the starboard trim tab should retract upwards, and the
port trim tab should deploy downwards.
7. If the wrong tab is moving as described in step 5 and 6, exchange wires 3 and 4 with 5 and 6 at the green
7 pin plug and repeat the testing process.
Photo sensor to
brighten and dim LEDs
LEDs indicate tab position
Indicator LEDs to show Gain
adjustment
(Single actuator, Single station)
ALC-1 Display
8
Adjust Bow Down or Bow Up
Buttons
Automatic/Manual control
button and AUTO LED indicator
Adjust Port or Starboard
sides up or down