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Calibration
Select the measurement area using the switch beforehand.
Three types of calibration can be performed with this instrument.
• Zero calibration : Only the amount of stray light is measured in advance in order to eliminate the effects of the stray light.
• White calibration : The reflectance is measured in advance using a known calibration plate in order to provide a reflectance scale.
• Gloss calibration : The gloss is measured in advance using a known calibration plate in order to provide a gloss scale.
This calibration is performed after white calibration with this instrument. (CM-26dG only)
Calibration Stage
Use a calibration stage with the same number as that printed on the nameplate of the instrument.
Newly purchased calibration stages will have a different number than that shown on the nameplate of the instrument. Make sure
the calibration plate ID displayed on the <Calibration> screen matches the calibration stage number.
Calibration data will need to be written (updated) any time you purchase a new calibration stage. Use the CM-CT1 standard accessory
PC software to write calibration data. For details, refer to "New White Calibration Plate / Gloss Calibration Plate" in the CM-CT1 manual.
„ Zero calibration
Since this instrument stores the data of the previous zero calibration, repeating zero calibration every time the
instrument is turned ON is not necessary. If, however, the measurement conditions change greatly, the instrument
is not used for a long period of time, or when using a MAV target mask (with glass), zero calibration must be
performed before white calibration.
Memo • The effects of stray light (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 that 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.
Notes
• 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.
• Before using the MAV target mask (with glass), it is necessary to set "Zero cal. skippable" (P.129) to "OFF" in
advance.
Operating Procedure
1
Press [MENU], and then use [◀] or [▶] to display the
<Calibration> screen.
Notes
• The following screen prompting calibration is
displayed when the instrument starts up. If zero
calibration has not been performed, the cursor will
appear on "Calibration (Including Zero Cal.)".
Otherwise, the cursor will appear on "Calibration
(Excluding Zero Cal.)".
35
Start the procedure from the measurement screen.
Calibration
Calibration
(Excluding Zero Cal.)
Calibration
(Including Zero Cal.)
Zero calibration date
2016/07/21 08:46:13
White calibration date
2016/07/21 08:46:32
Gloss calibration date
2016/07/21 08:46:54
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Troubleshooting
