BUCHI NIRFlex N-500 - Manual (Page 78)

7 Maintenance and repairs
78 NIRFlex N-500 Operation Manual, Version F
7 .8 NIRFlex Solids
It is possible that solids or pasty samples are spilled into the sample holder of the NIRFlex Solids.
In this case it is recommended to start the cleaning process as soon as possible to prevent any
damage of the instrument. Special attention is needed on that point, if aggressive media are spilled
over the instrument.
To clean the measuring cell, proceed as follows:
Remove the add-on from the measuring cell. •
If some solid residues are left in its sample holder, remove the cell from the instrument and turn it, •
so that the residues fall off.
If some pasty residues are left in the sample holder, remove them with a soft tissue and clean the
•
sample holder with a non-aggressive liquid (water or alcohol).
Special attention is needed to prevent the glass window from getting any scratches by using optical
tissues.
7 .9 NIRFlex Liquids
To clean the measuring cell, proceed as follows:
Take the measuring cell out of the basic instrument. •
Remove the cuvettes that might still be in the openings. •
Remove the sample holder from the measuring cell by loosening the screws in sample position 1, 3 •
and 5.
Clean the sample holder and the corresponding opening of the measuring cell. Make sure that
•
there are no residuals of sample anymore.
Place the sample holder back into the measuring cell and retighten the three screws.
•
! CAUTION
Minor or medium burns by hot surfaces
Let the cell chambers cool down sufficiently first •
Do not touch hot cell chambers or cuvettes •
NIRFlex Liquids measurement cell