BUCHI NIRMaste Pro IP65 - Manual (Page 28)

6 Operation
28 NIRMaster Operation Manual, Version B
External reference positioning for XL addon (without Spinner):
NOTE
For proper device calibration,
the External reference must be placed plane on top of the sample
window of the NIRMaster. It is not necessary to remove the spinner! In case the Spinner is installed,
turn the External reference until it fits perfectly.
In detail, the External reference:
• must not be tilted!
• must be aligned to match the cut-out of the centering plate on top of the instrument, without XL
addon installed!
• the External reference, the sample window and all other items /surfaces which might affect the
measurement must be absolutely clean!