Calibration; Zero Calibration - Konica Minolta CM-23d Instruction Manual

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.
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.
„ 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 or the instrument is not used for a long
period of time 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.
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.)".

Calibration

Zero calibration date
White calibration date
Start the procedure from the measurement screen.
Calibration
(Excluding Zero Cal.)
Calibration
(Including Zero Cal.)
2019/11/19 08:44:31
2019/11/19 09:41:33
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