APC AR1100 Betreibershandbuch Seite 81

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67
OPERATING PROCEDURES: NT (Tonometry) Measurement: NT Mode
2
<Error messages during NT measurement>
If the measurement was not performed correctly for some reasons, an abbreviated error
message is displayed above the measurement range indication.
In this case, eliminate the cause of the error, following the suggestions in the table below and
perform the measurement again.
Error message Description
ALM
(Alignment error)
Alignment is not proper.
Perform the alignment and the measurement again.
APL
(Applanation error)
As the eye was not opened enough, corneal applanation was
insufficient.
Instruct the patient to open his or her eyes wider.
If the patient cannot do so, ask an assistant to open the eyelids wider by
using a swab, etc.
OVR
(Over the measurement range)
The intraocular pressure exceeds the preset measurement range.
Switch the measurement range to “APC 60” or “60” and perform the
measurement again.
BLK
(Blinking of the eye)
The measurement is impossible because of blinking and slight
movement of the eye.
Instruct the patient not to blink or move the eye until the measurement is
completed.
After the eye stopped blinking and moving, perform the measurement again.
PCE
(APC error)
The patient’s eye cannot be measured with the air pressure which is
controlled by the APC function because of substantial fluctuation in
intraocular pressure.
Switch the measurement range from “APC 40” to “40” or from “APC 60” to
“60”.
TOO CLOSE
The space between the patient’s eye and the air nozzle is 9 mm or less.
Pull the joystick backward to increase the space between them.
NO SEARCH
The alignment spot cannot be detected.
CHECK THE EYE
This error appears when five consecutive APL errors with measurement
values occur.
Check the condition of the patient’s eye.
When APL errors continuously occur with no measurement values, this error
is not displayed.
OPEN THE EYE WIDER
Alignment is proper, but the eyelid detection lights cannot be detected.
Instruct the patient to open his/her eyes wider.
This error occurs only when the eyelid detection mode is turned on.
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Error message and measured data
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