Instruction manual

22
*Note: A er acquiring the double row of dashes [====], if more
than 15 seconds elapses prior to applanation, the Tono-Pen
will not measure.  e so ware will have initiated a battery-
saving function, indicated initially by the display of a single
row of dashes [- - - -], then followed in sequence by a blank
display [ ]. A new IOP measurement can be initiated by
depressing the operator’s button once.
*Note: Anytime the operator’s button is depressed
twice within
1.5 seconds,
(which may be caused by operator’s inadvertent
pressure on the button) the so ware will interpret this as a
demand for calibration.  en a sustained display of [
CAL
] will
CAL] will CAL
be seen which initiates the calibration sequence.  e calibration
sequence must be successfully completed before further mea-
surements can be accomplished.
6. Once activated, a er [====] is displayed and a “beep”
tone is heard, touch the Tono-Pen XL unit to the cornea
lightly and briefl y, then withdraw. Repeat several times.
The corneal surface needs only to be momentarily
contacted; indentation is not required and may lead to
inaccurate readings.
7. A chirp will sound and a digital IOP measurement will
be displayed each time a valid reading is obtained.  e
single horizontal bar at the bottom of the LCD, indicat-
ing statistical reliability, will not be displayed with each
single IOP measurement.
8. A er four (4) valid readings are obtained, a fi nal beep
will sound and the averaged measurement will appear
on the LCD along with the single bar denoting statistical
reliability.
*Note: If a single row of dashes [- - - -] appears on the LCD a er the
fi nal beep, an insuffi cient number of valid readings was collected. If this