How to calibrate the elevation on a Trotter 640T treadmill

Use the following procedure to calibrate your Trotter 640T elevation.

1. Press SHIFT and SPEED DOWN until D1 appears.
2. Press START three times to select D4.
3. Press and hold the DOWN ARROW until the treadmill stops then rises slightly.
4. Press the SPEED DOWN and this will set the lower limit.
5. Press and hold the UP ARROW until the treadmill stops then lowers slightly.
6. Press the SPEED UP and this will set the upper limit.