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E-29
Calibration
White Calibration
White calibration must be performed prior to start of measurement after the power is turned ON for the
first time after purchase at the current settings.
When white calibration finishes, <white calibration completed icon> is displayed.
Once white calibration is completed, measurement is possible without white calibration when the
instrument is turned ON the next time. However, the measurement result is not accurate.
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• The calibration data for the White Calibration Cap supplied with the instrument are stored in the instrument.
• Although the white calibration results stored in the internal memory are retained even after the instrument is turned
off, it is recommended that you repeat white calibration each time you switch the power back on.
• The reading may fluctuate slightly due to changes in the ambient temperature or due to heat generation caused by
repeated operation of the instrument. In this case, make sure to perform white calibration regularly.
• When I + E (SCI + SCE) is specified as the specular component mode (refer to page E-43 “Mode”), clicks caused
by opening and closing the optical trap may be heard during the measurement.
Note
• White calibration must be performed at the same temperature as the one at which measurement will be
performed.
• Before starting white calibration, make sure that the instrument is sufficiently acclimatized to the ambient
temperature.
• Whenever the measurement area setting has been changed between MAV and SAV, white calibration must be
performed.
[Setting Procedure]
1
Confirm the type of attached target mask and the setting of the measurement area
selector of the instrument.
2
Turn the instrument ON.
The <Calibration> screen is displayed.
Note
Check the status icons displayed at the top of the screen to
verify that the lens position (MAV/SAV) icon is correct for
the measurement area selector setting and for the type of
attached Target Mask.
• If a different screen is displayed, press the [CAL] button.
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• The <Calibration> screen shows two items: “Zero Cal.”
and “White Cal.” The date of the last calibration is
displayed under each item. If no calibration has been
performed yet, “None” is displayed.
• Under “White Cal.”, the serial number of the White
Calibration Cap to be used for the instrument is displayed.
3
If necessary, use the button of the cross
key to move the cursor to “White Cal.”