Use the following procedure to calibrate your Trotter 640T elevation.
- Press SHIFT and SPEED DOWN until D1 appears.
- Press START three times to select D4.
- Press and hold the DOWN ARROW until the treadmill stops then rises slightly.
- Press the SPEED DOWN and this will set the lower limit.
- Press and hold the UP ARROW until the treadmill stops then lowers slightly.
- Press the SPEED UP and this will set the upper limit.
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