X - R i t e e X a c t ™ I n s t r u m e n t
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An unsuccessful measurement will be indicated by an error message. See the
Troubleshooting section for more details.
Calibration
IMPORTANT
: The calibration plaque is dramatically affected by smudge marks and dust, and
must be kept clean. It is recommended that the instrument is cleaned regularly. Refer to the
Cleaning section later in this manual for procedure on cleaning the calibration plaque and optics.
The instrument has an integrated calibration plaque and will calibrate automatically when
required. When calibration is required before a measurement, the instrument will prompt you.
This occurs when the instrument is in the open position (not locked) and the previous calibration
has timed out. This can also occur when the measurement condition switch is changed and a
calibration has not been performed in that position or has timed out.
The calibration plaque is located directly below the optics when the instrument is in the open
position (not locked). When a measurement is taken, the calibration plaque swings back out of
the way of the optics.
Performing a Calibration
When a calibration is required and the instrument is in the open position (not locked) the
following message appears on the instrument. Locate the instrument on a flat surface and tap the
START button. The instrument will display a countdown screen and then perform the calibration.
A calibration is also required when the Measurement Condition switch is changed and calibration
has not been performed, or has timed out for that position. In this case, tap the START button on
the screen to begin the procedure and follow the remaining screen prompts.
Cal plaque
Measurement condition
switch
