Instruction manual

3.3 Calibration Procedure

Calibration must be performed whenever batteries are re-

placed or a er an unsuccessful calibration.  e calibration

procedure must also be routinely and successfully performed

once daily prior to instrument use, or whenever indicated by

the LCD display. To calibrate the Tono-Pen XL:

Point the transducer end of the Tono-Pen straight

down

towards the ﬂ oor (see Figure 3-6).

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

(see Figure 3-6).

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”.

A properly functioning Tono-Pen will display Good

followed by a “beep”.

A properly functioning Tono-Pen will display Good

Repeat this Calibration Procedure if bAd is displayed.

A er 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).

*Note:

If the Tono-Pen XL fails to yield a “Good” calibration,

call Medtronic Technical Service.