Datacolor 650/600/400 User's Guide Accessing the Transmission Compartment • 31
Transmittance Calibration
The following accessories are used to calibrate the instrument for transmittance:
Calibration Procedure
Before you begin, you should verify the current aperture selection. The setting must be
Medium Area View (MAV) and the barium-coated MAV plate should be placed at the
instrument port.
NOTE
Transmission calibration and measurements must be made using the barium-coated
Medium Area View (MAV) aperture plate.
To calibrate the instrument for transmittance measurements, do the following:
1. Place the barium-coated MAV aperture plate at the port.
2. Open the transmission compartment and make sure the optical path between the
sphere and the lens is clear.
3. Access the calibration procedure in the program you are running. You may need
to change the selections for the aperture plate, and measurement mode
(transmission). See also the User’s Guide for the program you are running for
detailed instructions to access the instrument setup and calibration options.
4. When you are prompted by the program, block the lens using the black card:
White Spectralon® Plaque.
Typically placed at the
sample port for calibration
and measurement.
Black Card. Used to “block”
the lens during calibration.
Barium-coated MAV Aperture Plate
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