Metrohm NIRS XDS RapidContent Analyzer - Manual (Page 67)

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8.2 Fan Filter Replacement
The fan filter should be inspected at least monthly. (If installed in a dusty or dirty environment, it
should be checked weekly or twice-weekly.) We recommend that instrument power be turned off
before changing the filter. The filter is changed as follows:
Turn off power at the power switch located on
the back panel.
The power cord may be removed for easier
access to the filter, if desired. This is not essential,
though we did remove it here for photos
Using both hands, grasp the filter cover and
gently unsnap it, starting at the top, and working
to the sides and bottom.
Lift the filter cover off and examine the filter
material. If clogged, it should be replaced.
A spare filter is included in the accessory box.