Instruction manual

CAUTION

Do not use the instrument without an Ocu-Film Tip Cover.

Use without an Ocu-Film Tip Cover will damage the instru-

ment and void the Warranty.

4.2 Calibration

 e Tono Pen XL unit is internally calibrated, thus the instru-

ment calibration should be checked only before the ﬁ rst use

each day or in the event of unanticipated readings. Calibra-

tion must be routinely and successfully performed once daily

prior to instrument use. Calibration should also be performed

whenever it is indicated by the LCD display, when batteries

are replaced, or a er an unsuccessful calibration. It is not

necessary to check calibration prior to each use.

*Note: If during operation the Operator’s Button is pushed only

once and the Tono-Pen displays CAL, the Tono-Pen needs to

be calibrated.

 e calibration procedure is as follows:

Point the transducer end of the Tono-Pen straight

down

towards the ﬂ oor.

Depress the Operator’s Button two times rapidly, (within

1.5 seconds).  e Tono-Pen will “beep” and display

CAL

Wait approximately 15 seconds for the Tono-Pen to

“beep” and display

Immediately (within 1 second) invert the Tono-Pen

smoothly, pointing the transducer end straight

A properly functioning Tono-Pen will display Good

followed by a “beep”.

Repeat this Calibration Procedure if

bAd

is displayed.