BUCHI NIRFlex N-500 - Manual (Page 76)

7 Maintenance and repairs
76 NIRFlex N-500 Operation Manual, Version F
The following screen indicates the laser lifetime counter is set to zero:
Hours of operation of the laser
Now click the Go Back icon • to finish the procedure.
7 .6 Filter pad replacement
When the filter pads at the rear of the instrument and the
measuring cell are dirty, ventilation and thermal stability of the
instrument will no longer be ensured.
Replace the pad after 6 month of use at the latest. An earlier
exchange might be necessary, when the instrument is operated
in a dusty environment.
To replace the ventilation filter, proceed as follows:
Remove the filter cover. •
Remove the old filter pad. •
Insert the new filter pad. •
Reinstall the filter cover. •
Replacing the filter pads
NOTICE
Risk of instrument damage by ingress of particles.
Check proper seating of the filter and filter bracket before use •
Do not operate instrument without filter •
NOTICE
Risk of instrument damage by overheating.
Do not block the cooling openings of the instrument •
Do not operate instrument with a clogged filter •