Calibration - Reichert TONO-PEN XL User Manual

Calibration

Calibration Procedure
The TONO PEN XL unit is internally calibrated, thus the instrument
calibration should be checked only before the first use each day or in
the event of unanticipated readings. Calibration 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 after an unsuccessful calibration. It is
not necessary to check calibration prior to each use.
1. Point the transducer end of the Tono-Pen straight down towards
the floor (see Figure 5a).
2. Depress the Operator's Button two times rapidly. The time be-
tween the first and second button press must be between 0.5 and
1.5 seconds. The Tono-Pen will "beep" and display [CAL].
3. Wait approximately 15 seconds for the Tono-Pen to "beep". The
display will change from [CAL] to [UP].
4. Immediately (within 1 second) invert the Tono-Pen smoothly, point-
ing the transducer end straight up (see Figure 5b).
5. A properly functioning Tono-Pen will display [Good] followed by a
"beep".
6. Repeat this Calibration Procedure if [bAd] is displayed.
7. After Good is displayed, depress the Operator's Button one time
and the Tono-Pen will display [8.8.8.8], followed by a single row
of dashes, [- - - -], and then by a double row of dashes [====]
followed by a "beep" tone, indicating the instrument is ready to
measure IOP (Depressing the activation button a second time will
interrupt this process and send the unit to calibration mode).
68E3441 Rev.F
Figure 5a Figure 5b
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