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E-27
Calibration
Zero Calibration
Since the CM-700d/600d stores the data of the zero calibration performed at the factory, it is unnecessary
to repeat the zero calibration every time you turn ON the instrument. However, if the measurement
conditions change greatly, or if you use the optional dust cover set or Target Mask
φ
8 mm (with glass),
you need to perform zero calibration before white calibration.
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• The effects of stray light inside the measuring part (i.e. light generated due to the flare characteristics of the optical
system) will be compensated for automatically by the zero calibration data.
• The amount of stray light may change because of dust or dirt which has collected in the optical system, humidity,
repeated operation, or vibration and shock exerted on the instrument. In this case, performing zero calibration
periodically is recommended.
• 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
• If the instrument is not used for long periods of time, the zero calibration data stored in the instrument may be
lost. If the data is lost, zero calibration must be performed again.
• When the instrument is used for the first time after purchase at a given measurement area setting (MAV or
SAV; SAV is available on CM-700d only), zero calibration must be performed.
• If you performed zero calibration using the optional dust cover set or Target Mask
φ
8 mm (with glass), you
must perform zero calibration again before starting measurement using the standard Target Mask.
[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.