Zeiss humphrey HFA II-i series, Руководство по обслуживанию на месте

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Humphrey Field Analyzer II - i Adjustment / Calibration
Confidential and Proprietary
52235C1105 4 - 37
Field Service Guide
4.9.2 Belt Tension
Belt tension is adjusted by feel.
4.9.3 Edge Detector
Adjust the edge detector and/or flag to center the flag in the edge detector slot.
4.9.4 Touch Screen
Purpose
This procedure is designed to calibrate the touch screen well enough to enable error-free use
of the Patient data entry menu. The calibration process entails iterations of verify-calibrate,
verify-calibrate — until the touch screen response occurs within 1/8" of the point of contact at
the four corners and center of the screen.
Special Tools/Equipment Required
P
Pencil Eraser
Verification
Check/verify touch screen calibration in the following manner.
1) Go to any screen and, using the pencil eraser tip, touch the screen in the four corners
and in the center. Observe how far away the screen response appears from the point of
contact.
2)
P
If the screen response is more than 1/8" away from the point of contact:
Proceed to the Calibration Procedure below and recalibrate the touch screen by
"following the error". (For example: If the response of the touch screen at the left
side of the CRT was leftward from the point of contact, then at the next touch
screen calibration, you should touch the upper left corner further to the left than
you did during the last touch screen calibration, i.e.,
"follow the error"
— this is
why it may take more than one cycle of verify-calibrate to achieve acceptable
calibration.)
P
If the screen response is
within 1/8"
of the touch screen contact point, make a
final check as follows:
From the main menu, select
PATIENT
icon, then
PATIENT NAME
, and type in
your name. Verify that the screen displays exactly what you typed (if so, touch
screen calibration is adequate).