Metrohm 887 Professional UV/VIS Detector - Manual (Page 42)

6.6 Cleaning the flow-through cell ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
34 ￭￭￭￭￭￭￭￭ 887 Professional UV/VIS Detector
1 Retaining screw 2 Outer seal
3 Lens 4 Inner seal
5 Measuring cell – opening 6 Cell holder
2 Removing the lens
￭ Loosen the retaining screw (13-1) with a slotted screwdriver size
5 and remove it.
Remove the seal from the inside of the retaining screw (13-2).
￭ Carefully remove the lens (13-3) and the inner seal (13-4) from
the measuring cell.
￭ Put the lens onto a white paper, this allows you to see possible
deposits.
3 Cleaning the lens
￭ Clean the lens with ultrapure water, methanol or another suitable
solvent (depending on the application) and wipe with a lint-free
cloth.
￭ Rinse again with ultrapure water and dry with a lint-free cloth.
4 Re-inserting the lens
￭ Insert a new inner seal (13-4) into the measuring cell, make sure
that it lies flat and centered in the recess of the measuring cell.
￭ Insert the lens (13-3) with its flat side in into the measuring cell,
make sure that it lies flat an centered in the recess of the measur-
ing cell.
￭ Insert an new outer seal (13-2) into the retaining screw.
￭ Insert the retaining screw (13-1) and tighten it with a slotted
screwdriver size 5.
5 Cleaning the second lens
Repeat steps 2 – 4 at the opposite side of the cell holder.
6 Re-inserting the flow-through cell
Follow steps 3 – 4 of "Installing the flow-through cell", page 18.