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11.2 Check procedure with measurement drum set to 2
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 calibration arm (Figure 5). The arm is
engraved with 5 circles. The Centre circle corresponds to drum position
0, the two immediately to the left and right to position 2, and the
outermost two to position 6. The arm is only marked on both sides of 0
to maintain symmetry in order to calibrate.
Slide the bar in the support until one of the position 2 marks on the
weight is located exactly at the reference mark of the weight support
(figure 5). With the weight of the bar towards the examiner the 2 check
can be made.
Continued on page 26
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Figure 5: Control Weight
11. Routine Instrument Maintenance
6
0
2
Patient
Examiner
