AQ-00275-000, Rev. 3
11
10. Alternately adjust mirrors M4 and M5 to center the reference beam on both the refer-
ence beam entrance and the reference ports such that the beam is not clipped by the
center mount sample holder.
11. Insert the reference beam aperture plate into the clips at the reference beam entrance
port. The plate should be inserted with the aperture vertically aligned with the shape
of the beam and with the coated surface facing in toward the sphere. The purpose of
the aperture plate is to reduce the horizontal flare in the beam, once it enters the inte-
grating sphere.
12. Viewing the image of the reference beam at the reference port, center the aperture
plate on the reference beam.
Note: Leave the aperture plate at the reference beam entrance port during all measurements.
13. Turn power to the spectrophotometer off. Plug the accessory detector cable into the
instrument, turn the instrument back on and reboot the software. Place standards over
both reference and sample reflectance ports. The accessory is now ready for opera-
tion.
Diagnostic Scans
This section of the instruction manual contains the procedures for a series of diagnostic scans on
your accessory. These scans were performed on your accessory with our instrument before we
shipped the DRA-CA-3300 to you.You should perform these scans again on your instrument after
installing the accessory to validate proper operation of the accessory. The scan results should be
retained for future use. If problems develop with your accessory in the future, repeat the diagnostic
scans and send us copies for analysis.
The quality assurance documentation includes a copy of the diagnostic scans we performed at Lab-
sphere. The instrument parameters used for each diagnostic scan are listed under the test results.
You should use these same parameters for your diagnostic scans.
Uncorrected Baseline:
1. Set up instrument parameters as listed on the Labsphere diagnostic scan reports in the
quality assurance documentation. The instrument should be configured with a normal
beam interchange and in the double beam mode.
2. Place a calibrated Spectralon standard SRS-99-020 (if available, otherwise, use an
uncalibrated Spectralon standard) over the reflectance sample port. Place an uncali-
brated Spectralon USRS-99-020 over the reference port.
3. Perform an instrument baseline correction to generate the uncorrected baseline scan.