Uv Filter Calibration; Datacolor 650 Transmittance Options - Datacolor 650 User Manual

UV Filter Calibration

The procedure for calibrating the adjustable UV filter is performed in reflectance mode, and
requires the use of a fluorescent white tile, provided with the instrument. This procedure
requires the selection of specific software options. See also the Datacolor Tools User's
Guide contains step-by-step instructions to calibrate the adjustable UV filter.
NOTES
This calibration procedure is critical to the accurate measurement, either reflectance or
transmittance, of fluorescent samples.
If you are sharing either reflectance or transmittance data for fluorescent samples, the
adjustable UV filter in each of the instruments must be calibrated regularly.

Datacolor 650 Transmittance Options

The Datacolor 650 includes an option to measure the transmission properties of
transparent and translucent samples. The 650 can measure the "regular" transmittance of
transparent solid and liquid samples, as well as the "total" and "diffuse" transmittance of
translucent samples. The Datacolor 650 can also be used to perform the following
evaluations:
Haze evaluations, in compliance with ASTM D1003 Standard Test Method for
•
Haze and Luminous Transmittance of Transparent Plastics, for materials that
exhibit slight light scattering.
APHA evaluation, which measure the yellowness of liquids.
•
The transmission compartment of the Datacolor 650 is large enough to allow the colorist to
easily insert and remove samples. It has been fitted with a removable spill tray in the event
of minor spillage of liquid samples.
NOTES
The transmission option is available on both the Datacolor 650 and Datacolor 650V. See
also Datacolor 650 Vertical Mount Options in this guide for instructions to use the
transmission option in the vertical mount unit (Datacolor 650V).
To calibrate the instrument for transmittance and to make transmittance measurements, the
sample holder base and transmission sample holder base must be installed.
The transmission sample holder base is installed at the factory for Datacolor 650V units.
24 • UV Filter Calibration Datacolor 650/600/400 User's Guide