Metrohm NIRS XDS MultiVial Analyzer - Manual (Page 36)

34 ▪▪▪▪▪▪▪
Use the iris to center samples in the window area.
Push the handle to the right to center the sample,
then to the left to move the iris from the sample
window area.
Close the door of the sample chamber to exclude
ambient light.
Take a reference scan, the take a sample scan of the
material.
NOTE: If acquiring vial spectra that will later be used
with a vial tray, be sure to perform the Reference
Standardizations as described for both “Use Iris” and
“Use Tray” positions. This assures consistent spectra.
The MultiVial Analyzer may also be used for liquid
analysis using the Reflectance Cell and Immersion
Diffusers.
These cells are often used for clear to semi-clear
liquids such as alcohols and suitable fluids.
When using vial trays in the normal mode, the vials
are slightly elevated from the sampling window. A
separate Reference Standardization is performed in
the “Use Tray” mode to account for the slight
photometric difference between the “Use Iris” mode
and the “Use Tray” mode.
Vision applies the proper Reference Standardization
based upon selection of “Use Iris” or “Use Tray”.
Removal of the Iris Adapter is quite straightforward. Simply remove the Iris Adapter Assembly by
lifting straight upward, off the pins. Be sure to set the Select Tray dialog box to the correct setting
for the type of cell being used.