GretagMacbeth iCFilm, Руководство пользователя

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User Guide
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GretagMacbeth® iCFilm User Guide
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9. Calibration
A GretagMacbeth calibration wedge is supplied for checking the calibration of the iCFilm.
Attention: Check the expiration date on the calibration wedge. Correct measuring results can only be obtained with a valid calibration
wedge. Protect the GretagMacbeth calibration wedge from heat and direct sunlight, chemicals, mechanical influences, etc. A defective
calibration wedge may lead to a faulty calibration and therefore incorrect measuring results.
9.1 Calibration check
The calibration check of the iCFilm should be performed periodically using the GretagMacbeth calibration wedge.
• Zero the device on the zero field of the calibration wedge (see section 8.2).
• Select "DENS" function by using button
B
as often as necessary.
• Press shortly button
A
. Place the density patch of the calibration wedge onto the measurement aperture.
• Press down the iCFilm until the density value is displayed.
If the measured density value deviates from the density calibration value by more than ± 0.01 D, then the instrument must be calibrated.