Canon TX-F Operation Manual page 58

8.2 Before Calling a Service Person
Message / Display
[4] OVER ERROR
TRY AGAIN
[5] IOP > (<) = xx* mmHg!
ONE MORE -> START SW
NEXT EYE -> R/L SW
(END -> PRINT SW)
[6] WARNING IMAGE
TRY AGAIN
[11] STOPPED BY USER
[12] CHARGING
Cause
Result was over the measure-
ment range (30mmHg/
60mmHg).
The result was over (under) the
value set from "WARNING IOP"
in SET mode.
* xx: Value set in SET mode
The pupil is obscured by eye-
lashes.
The examinee's eye moved just
before the measurement.
The movement of measurement
head has been cancelled
because the examiner has
pressed one of the switches
when the measurement head
was moving to the other side, or
during initialization.
Examinee pressed the START
switch to measure the eye forc-
ibly during automatic alignment,
but the measurement failed
because the instrument was not
charged.
– 48 –
Remedy
[When "30" is selected for
"RANGE" in SET mode]
Press the START switch again
as the range will automatically
switch to "60".
Measurement range will return
to "30" if the result of measure-
ment is under 25 mmHg, or if R/
L switch, PRINT switch or
CLEAR (DEMO) switch is
pressed.
[When "60" is selected for
"RANGE" in SET mode]
Press the START switch again.
If the error still appears, it means
measurement cannot be made
with the TX-F as the pressure of
the examinee's eye is higher
than 60 mmHg.
Press START switch to measure
again. Measurement will be per-
formed once each time the
switch is pressed. After the mea-
surement, press R/L switch to
measure the other eye.
Or, if the other eye has already
been measured, press PRINT
switch to print out the result.
Check the image and instruct
the examinee to keep his/her
eye open wide, or help them
open the eye widely by lifting up
the upper eyelid lightly with your
fingers. Then, measure again.
Check the image and ask the
examinee not to move his/her
eye. Then, measure again.
Press R/L switch again as
required.
Check that the READY lamp is
lit, and measure again.