Veris Technologies VIS_NIR Spectrophotometer Probe - Operating Instructions - Manual (Page 23)

OM17-P4000VIS-NIR
4-2
How to take Manual Reference
In order to calculate reflectance a dark and reference measurement must be taken
initially when the software starts, and then every 10 minutes to ensure all
measurements are accurate and to compensate for any discrepancies in the
spectrometer or light source due to temperature. The software will alert the user when
these conditions occur by displaying Take manual reference in the system message as
well as the ref check light flashing.
Figure 3
Before placing the reference block on top of the wear plate window wipe the wear
plate window clean of any debris.
Figure 4
Reference block to be used for dark/ref measurements. This is the block stamped
dark/ref.
Figure 5A & 5B
Example of what screen will
look like when manual
reference needs to be taken.
First place the reference block
holder on the end of the probe
as shown Then slide references in front of
window. Be sure reference
material is facing the window