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Keeler recommends this routine maintenance be carried out by the
user frequently to ensure safe and accurate measurement.
In the event of the device being outside of the calibration
tolerances, it is important to send the device back to Keeler Ltd. or
your local dealer for repair and re-calibration.
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12. Routine instrument maintenance
Figure 5: Test arm
12.1 Check procedure with test arm set to 20
This is the most important check procedure, since measurement of
intraocular pressure in this area is highly significant. We recommend
running this check daily.
This check is made using the test arm (figure 5). The arm is engraved
with 5 rings. The centre ring corresponds to 0 mmHg, the immediate left
and right rings correspond to 20 mmHg and the outer rings correspond
to 60 mmHg.
Slide the bar along the holder until the 20 mmHg reference mark aligns
perfectly to the index line on the holder. Ensure that the shorter portion
of the test arm faces the examiner.
60 mmHg
Continued
60 mmHg
20 mmHg
0 mmHg
20 mmHg
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