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The white calibration plate is used to perform white calibration for measurement of reflectance and to cover
the reflectance measuring port when performing transmittance measurements (zero calibration, 100%
calibration, measurement).
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Make sure that there is nothing in the transmittance chamber.
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Before performing white calibration, attach the target mask to be used for measurements.
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Before performing zero calibration, set the same measurement area, specular component (SCI/SCE),
and UV light quantity as when performing zero calibration using the software.
In the fluorescent measurement that does not require rigorous accuracy (that does not perform fluorescent
calibration), perform measurement under the condition that the UV cut-off filter does not cover the xenon lamp (UV
light quantity is 99.9).
Attaching the White Calibration Plate
1.
Pull the sample holder toward you and keep it
open.
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The sample holder will remain open
when opened more than 70 degrees.
2.
Position the white calibration plate so that it is
held in place by the sample holder by fitting the
sample holder pad into the concave (rear) side
of the white calibration plate as shown at right.
Notes on Use of White Calibration Plate
Memo
• When performing white calibration, the white calibration data for the white calibration plate being used is
required. The white calibration data for the white calibration plate included with the instrument is stored in the
instrument’s memory at the time of shipment.
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The white calibration plate may become discolored if left exposed to light. Therefore, when not in use,
make sure that the lid is closed to prevent exposure to light.
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Take care not to scratch, touch, or make the white calibration plate surface dirty with such as fingerprints.
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If the white calibration plate gets dirty, wipe it with a soft, clean, dry cloth.
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If dirt is difficult to remove, dampen a cloth with commercially available lens cleaning liquid and wipe the
white calibration plate. Then wipe off the liquid with a cloth dampened with water, and leave the plate to dry.
Should the white calibration plate get so dirty that it cannot be cleaned, replace the plate with a new one.
If the White Calibration Plate is changed, reset the white calibration data to the new plate’s.
Updating White Calibration Data
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You may the "Data Setting Tool software" stored on the CD-ROM accompanying White Calibration Plate
CM-A139 or the optional Color Data Software SpectraMagic™ NX to set the white calibration data.
CAUTION
Do not perform measurement with the specimen measuring port directed
towards your face. Doing so may cause damage to your eyes .
Be careful around openings in the CM-3700A. Failure to do so
may result in fingers being trapped causing injury.
