2-1
Tab Down Tab Up Enter Back Read On/Off
2. Instrument Calibration
General Information
Regular calibration of the instrument is important in maintaining accurate measurements.
The instrument should be calibrated to the white standard and docking station (zero
reference port) the first thing each day, and every twelve hours of operation
thereafter. A Cal Required message appears in the display when the calibration
procedure has not been performed for 12 hours.
Whenever this message appears in the display, the calibration procedure must be
performed. No measurements can be taken until calibration is completed.
Calibration Notes
• Dirt or dust in the optics area will cause an inaccurate calibration reading. Refer
to Section Four for optics cleaning procedure.
• The white calibration reference is dramatically affected by smudge marks, dust,
and fingerprints. Refer to Section Five for white calibration cleaning procedure.
• Do not move instrument while taking calibration measurements. If motion is
detected, an error message displays and the calibration is aborted.
White Calibration Reference
The white calibration reference is stored on the left side of the docking station and is
designed to keep the reflection tile free of dust and debris.
White Calibration Reference
