Buchi NIRMaster Essential, Operation Manual

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8 | Help with faults
Büchi Labortechnik AG
40/46 Operation Manual NIRMaster™
8.3 Reference measurement fails
When the deviation between the stored reference spectrum is out of limit, the
reference measurement will fail. A dialog will show both curves and give details of
the measurement result.
Possible reasons for a reference measurement to fail:
— Optical surfaces (e.g. external reference) are dirty or scratched
— Environmental conditions out of operational range (e.g. condensating humidity at
optical surfaces)
— Defective instrument (e.g. electronic damage)
— After lamp-module exchange
What to do:
u
Clean the external reference and the instrument output window.
u
Place the external reference onto the output window and press the ‘Rerun’
button to repeat the measurement.
u
If measurement still fails, a new reference spectrum can be stored by pressing
the ‘Checkmark’ button.
NOTICE! An administrator login is required to store the
new data set. Setting a new reference spectrum should be the last option after
consequent trouble shooting (run SST).