Reichert TONO-PEN XL Guide de l'utilisateur télécharger pdf (Page 11)

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Calibration Procedure

The Tono Pen XL unit is internally calibrated, thus the instrument calibration should

be checked only before the rst 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:

Point the transducer end of the TONO-PEN straight down towards the oor

(see Figure 5a).

Depress the Operator’s Button two times rapidly. The time between the rst

and second button press must be between 0.5 and 1.5 seconds. The TONO-

PEN will “beep” and display [CAL].

Wait approximately 15 seconds for the TONO-PEN to “beep”. The display will

change from [CAL] to [UP].

Immediately (within 1 second) invert the TONO-PEN smoothly, pointing the

transducer end straight up (see Figure 5b).

A properly functioning TONO-PEN will display [Good] followed by a “beep”.

Repeat this Calibration Procedure if [bAd] is displayed.

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, indicat-

ing 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).

Calibration

Figure 5a

Figure 5b

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Reichert TONO-PEN XL Guide de l'utilisateur Page 11