Trip Level.(Low Volts) Calibration; Grade Potentiometer Calibration; Post-Maintenance Procedure - Quinton Q55 Service Manual

5.4.3 Trip Level (Low Volts) Calibration
This procedure is included to provide
information about the setting of trip level
potentiometer 2AIR23. This potentiometer
should not require resetting once it has been
set at the factory.
1. Unplug the treadmill and remove the
handrail and hood.
2. Hook the treadmill up to a Variac
autotransformer that can provide at least 10%
less than operating voltage (for 230V, use
207V; for 208V, use 187Vj for 115V, use 103V).
WARNING
I
Do not wear loose clothing around
rotating machinery. High voltage is
present when the treadmill cable is
plugged in.
3. Turn the drive motor on at 1-3 mph or 2-5
kph.
4. Turn the screw at trip level
potentiometer 2AIR23 on the PCB so that the
LO VOLTS LED on the PCB just barely comes
on.
5. Unplug the treadmill from the Variac
autotransformer and replace the handrail and
hood.
5.4.4 Grade Potentiometer Calibration
This procedure may be performed wi th the
hood and handrail already re moved and power
on, provided caution is exercised.
1. Take treadmill grade to approximately
12% (6-7
0 ).
2. Unplug the treadmill, remove the hand-
rail and lift the hood straight up off the
treadmill.
3. Turn the sprocket on the pinIOn shaft
toward the drive motor until the grade reading
is 8-10% (5-6
0 ).
WARNING
I
Do not wear loose clothing around
rotating machinery. High voltage is
present when the treadmill cable is
plugged in.
4. Restore power to the treadmill and
decrease the grade to minimum. Verify that
the torque limiter is slipping and that the
grade is level. The grade potentiometer is
now set at zero.
5. Calibrate grade (Section 5.4.2).
5.5 POST ·MAINTENANCE PROCEDURE
The checkout procedure provided in Section
2.4 can be performed to verify that the
Q55/Q65 treadmill is operable following
maintenance. If a more detailed procedure is
desired, the troubleshooting tree provided on
pages 4-2 through 4-5 can be used to perform
a checkout test.
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