33
OptiFlex® 3 Continuous Passive Motion (CPM) Therapy Unit
7 CALIBRATION
5.
With the 3/32” Allen wrench, loosen the two
set screws retaining the potentiometer.
Refer to Figure 7.5.
FIGURE 7.5
6.
Connect the negative (black) lead from the
Digital Multimeter to the Motor Control
Board Mounting Bracket and the Positive
(red) Lead to the Red Wire on the
Potentiometer.
Refer to Figure 7.6.
FIGURE 7.6
7.
Rotate the Potentiometer by hand until a
value between 1.018 Volts - 1.081 Volts is
displayed on the Digital Multimeter.
Refer to
Figure
7.7.
FIGURE 7.7
8.
Torque the two potentiometer set screws
with the preset 5 inch-pound “T”-Handle
Torque Wrench. Verify voltage.
Refer to
step
7.
9.
Press the Extension button. This programs
the zero position in the software.
10.
Press the Up Arrow button until the front of
the Carriage Guide Bar is approximately
1.250" (32 mm) from the cut out in the
Front
Cover.
Refer to Figure 7.8.
NOTE:
At any time during this process if the Carriage is
moved too far, an Error Message may be displayed. It
will then be necessary to manually move the Carriage
by loosening the Femur Bar and raising it until the
Carriage Guide Bar is approximately at 0º to cancel the
Error. Once the Guide Bar is zeroed, turn the unit off to
clear the error message.
If the Carriage is required to be manually moved,
then it will be necessary to re-start the Initial Position
Calibration Procedure.
Refer to 7.1, part C.
FIGURE 7.8
11.
Press the Flexion button. This programs the
upper limit position in the software.
12.
Install the Potentiometer Cover and Decal by
reversing
Section B.
13.
Power unit off and on. This completes
Potentiometer Position Calibration.
14.
Perform
Force Reversal Calibration,
Section
7.2.
7.1 ANGLE POTENTIOMETER POSITION CALIBRATION (CONTINUED)
LOOSEN SET SCREWS
RETAINING POTENTIOMETER
IN POSITION
1.250"
32 mm
POTENTIOMETER
MOTOR CONTROL BOARD
MOUNTING BRACKET
POTENTIOMETER
RED WIRE
Failure to re-install and properly tighten all
screws may result in Electrical Safety System
degradation which may cause unit damage,
malfunction, electrical shock or personal
injury.
