Page 30 13900-103 Rev. A
Final Checks
This paragraph provides the final checks and steps to
ensure that the unit is fully functional after a calibration
has been performed using the Service Card.
1. Ensure that the tonometer head cover and Nosepiece
Cover are installed and then perform a final Fire
Around check of the low and high rubber eyes using
0.8 steps to ensure that the optical alignment is still
within specifications of the calibrated rubber eyes
and has an acceptable peak amplitude.
2. Ensure all input power to the AT550 is disconnected
and then reinstall the side covers using the four lower
screws which were removed. Torque to approxi-
mately 12.0 lbf·in (1.4 N·m).
3. Install the screws washers, and spacers (which were
removed) to secure the top section of the side covers.
Torque to approximately 10.0 lbf·in (1.1 N·m).
4. Attach the connector from the left/right detector to
the mating connector attached to the motor board at
J13.
5. Install the top cover and secure the screws (attached
to the top cover) into the bracket attached to the to
the side covers. Torque to approximately 12.0 lbf·in
(1.4 N·m).
CAUTION: USE ONLY A 13717 CALIBRATED RUBBER EYE
FIXTURE WHICH HAS BEEN VERIFIED FOR
ACCURACY AT THE REICHERT FACTORY WITHIN
THE LAST 6 MONTHS OR INCORRECT CALIBRA-
TION MAY RESULT.
6. Align the low value calibrated rubber eye in front of
the air-puff nozzle approximately 0.5 to 1.0 inches (1.3
to 2.5 cm) from the end of the nozzle (Refer to Figure
CT-7).
7. Apply the correct input power to the unit and then
press any button when displayed.
8. Place your hand approximately 2 inches (5 cm) from
the top cover and in front of the right face detector
(operator's right side) and then press the measure
button. Take three readings.
Note: If the right side face detector is working, the left/
right icon will not appear. If the left and right icon
appear, the detector is not working, the patient
was too far from the detector, or both detectors
were activated.
9. After the measurement is complete, align the high
value calibrated rubber eye in front of the air-puff
nozzle approximately 0.5 to 1.0 inches (1.3 to 2.5 cm)
from the end of the nozzle (Refer to Figure CT-7).
10. Place your hand approximately 2 inches (5 cm) from
the top cover and in front of the left face detector
(operator's left side) and then press the measure
button. Take three readings.
11. Print the results and observe that the printer is
functioning correctly and that the characters are
legible.
12. Move the calibrated rubber eye away from the air-
puff nozzle and press the measure button. Place your
finger approximately 1 inch (2.5 cm) in front of the air-
puff nozzle. The tonometer should move toward your
finger without touching it and then display "Too Close."
Note: If the tonometer touches your finger with it held
still, the proximity sensor may not be working
correctly. If the proximity sensor is not working,
please call Reichert at the number given in the
Introduction section of this procedure.
13. Press the red reset button located behind the printer
door and ensure that the unit restarts correctly. Press
any key to continue.
14. Press the button below the MODE icon and then press
the button below the LOCK icon. This will move the
tonometer head into position so that the travel lock
can be engaged.
15. Engage the travel lock by inserting a Phillips #2
screwdriver into the slot and pushing it forward then
turn the screw clockwise until it is hand tight (ap-
proximately 4 full turns).
Note: A description with pictures of engaging the travel
lock is provided in the User's Guide for your
reference.
Note: This completes the final checks for the unit. The
unit should be ready for packaging and/or
transportation.
Note: If any of these final checks are not within the
limits of what is expected or performing as
expected, you may call Reichert Ophthalmic
Instruments at the number indicated in the
Introduction section of this manual and arrange
to return the instrument for service.
Calibration (Continued)
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