Instruction manual

21
5. To initiate an IOP measurement, depress the Operator’s
Button once, and only once.
Initially you will see a brief display of [8.8.8.8].  is is a
self-test of the LCD (Liquid Crystal Display). If any of
the LCD segments are not displayed, the Tono-Pen re-
quires service.
If a momentary display of [CAL] is seen, followed im-
mediately by a single row of dashes [- - - -], it indicates
that the Tono-Pen requires calibration before it will
measure.
If a double row of dashes [====] is seen and a “beep”
tone is heard, it indicates that the Tono-Pen is ready
to measure IOP. Proceed with applanation within 15
seconds.
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Figure 4-1 Corneal Applanation
Incorrect
Correct