Datacolor 800, 850, 500, and 550 Series User’s Guide 23
Reflectance Calibration
The instrument should be calibrated every 8 hours to compensate for changes in the
environment. A black trap, white tile and green tile are provided with all instruments to
complete the calibration:
The black trap and white tile are used each time the instrument is calibrated. The green tile
is used to perform an optional diagnostic test.
Reflectance Calibration Procedure
The software prompts for calibration vary from one program to another. All of the
procedures include two measurements:
The black trap
The white tile
Before you begin, verify that the aperture plate at the port matches the aperture selection in
the program you are running.
1. Access the calibration procedure in the program you are running.
2. When you are prompted by the program, place the black trap at the instrument
port.
3. When you are prompted by the program, place the white tile at the instrument
port.
4. The program may prompt you for a diagnostic tile. If prompted, place the green
tile at the instrument port, and start the measurement.
5. After these measurements are completed, the program will display a message
that the calibration is successful. You can now start measuring samples.
The Datacolor User’s Guide for the program you are running (e.g., Datacolor TOOLS, etc.)
provides step-by-step instructions regarding the (instrument) software setup and calibration
procedure.
NOTES
If sequential total transmittance and reflectance measurements are going to be made using
the Datacolor 850/550, the instrument should be calibrated for both transmittance and
reflectance conditions. Transmittance measurements are made using the barium-coated
MAV aperture plate.
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