318 1220 Infinity II LC System User Manual
11
Maintenance and Repair
Diode Array Detector (DAD)
Cleaning or Exchanging the Holmium Oxide Filter
When If holmium oxide filter is contaminated
Tools required Description
Screwdriver, Pozidriv #1 PT3
Screwdriver, flat blade
Wrench, 1/4 inch
for capillary connections
Pair of tweezers
Parts required # p/n Description
1 79880-22711 Holmium oxide filter
Preparations Turn the l amp(s) off.
Remove the front cover.
Remove the flow cell, see “Remove and Install a Flow Cell” on page 307.
See also “Declaration of Conformity for HOX2 Filter” on page 389.
The glass tends to build a film on its surface even under normal environmental conditions.
This is a phenomenon, which can be found also on the surface of several other glasses
and has something to do with the composition of the glass. There is no indication, that the
film has an influence on the measurement. Even in the case of a thick film, which scatters
the light remarkably, no shift of the peak positions is to be expected. A slight change in the
absorbance might be possible. Other components within the light path (lenses,
windows,...) are also changing their behavior over the time.
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