User`s guide
Page 15
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 software will
interpret this as a demand for calibration. Then a sustained display of [CAL] will be
seen which initiates the calibration sequence. The calibration sequence must be
successfully completed before further measurements can be accomplished.
Once activated, after [====] is displayed and a “beep” tone is heard, touch the
TONO-PEN VET unit to the cornea lightly and briey, then withdraw. Repeat
several times. The corneal surface needs only to be momentarily contacted;
indentation is not required and may lead to inaccurate readings.
A chirp will sound and a digital IOP measurement will be displayed each time
a valid reading is obtained. The single horizontal bar at the bottom of the
LCD, indicating statistical reliability, will not be displayed with each single IOP
measurement.
After four (4) valid readings are obtained, a 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 after the nal beep, an
insufcient number of valid readings was collected. If this occurs, repeat the
patient examination procedure, starting at step 1.
To take another measurement, reactivate the TONO-PEN VET unit by
pressing and releasing the activation switch as described in step 5.
Note: If not reactivated within 25 seconds, the TONO-PEN VET unit will
automatically turn off and the LCD will clear, placing the device in sleep mode, to
conserve battery life. If this occurs, activate the TONO-PEN VET by pressing the
Operator’s Button once.
Replace the Ocu-Film Tip Cover before using the TONO-PEN VET unit on
another patient and before storage.
Note: Failure to replace the Ocu-Film Tip Cover between patients may result
in unreliable readings of IOP by allowing debris to enter the transducer
assembly.
Note: A reused Ocu-Film Tip Cover may leak. This may cause damage to the strain
gauge and void the Warranty.
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Taking a Measurement