Metrohm NIRS Analyzer PRO - Manual (Page 64)

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2. Vision displays the Instrument
Configuration box. This information
is used to set up the Diagnostic
Database entries for this instrument.
If correct, click on “OK”.
This box is shown upon each initial
connection, and is not shown on
subsequent diagnostic tests, as long
as the instrument has remained
connected to Vision.
3. Vision asks which fiber should be used for the
test. The test defaults to the Sample fiber. (Do
not click yet.)
The Direct Light system should be tested in the
“Reference” position. Click on “Reference” to
begin the test. The system defaults to Lamp 1.
You may hear the instrument making noises as
the Optical Switch begins its operation. A note
will be shown at the bottom of the Vision
screen explaining each step.
NOTE: While the “Sample” position could be used for Performance Test, this is not
recommended with Direct Light. There are several reasons for this. First, a bright, 99%
Spectralon sample without a quartz window should be used. Second, the distance should be
75mm (about 3”) from the sample window. If the Spectralon is used frequently for
Performance Testing, it will be very difficult to keep it clean, and this may impact other
instrument adjustments and results.
As a precaution, always keep the probe window very clean. Do not allow dust, dirt, or liquids
to contaminate the surface. Consistent spectral performance depends upon clean surfaces.