Download Mantis 5000 Specifications

Figure 47. Removing the light seal.
Note
The lockdown lever is accessible just underneath the DRA base plate.
5. Slide the lever on the instrument front panel to the right.
6. Remove the front lockdown pin.
7. Tilt the front end of the accessory. Using the accessory handle, lift the DRA up and
out of the sample compartment and store it in the accompanying wooden box.
8. Replace the sample compartment front panel.
Collecting baseline scans
When taking reflectance measurements using a reflectance accessory, three types of
baseline corrections can be applied to the scan data. A simple correction is used in the
diagnostic scans that is quick and does not require zeroline or reflectance standard data.
A second and third method uses a zero baseline correction that can be applied by one of
two methods: either the sample beam can be blocked off from the integrating sphere
during the 0%R baseline scan or a light trap can be installed over the sample reflectance
port.
Note
The blocked beam method is discouraged by ASTM E 903 for reflectance
measurements because the effect of scattered light incident on the sphere wall is
not included in the data collection.
During transmission measurements, either the standard baseline or the blocked beam
method should be used. The spectrophotometer and accessory must be warmed up for 30
minutes prior to recording any of these baseline scans.