See below Hope this helps you To lock the VSI: 1. With the VSI powered on, press and hold the on/off key. After one (1) second, the VSI should beep. 2. Release the on/off key. 3. Push the joystick to the full forward position until the VSI beeps. 4. Pull the joystick to the full rearward position until the VSI beeps. 5. Release the joystick. There should be a long beep.
6. The VSI is now locked.
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