Metrohm Thin-Layer cell - Manual (Page 23)

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5 Operation and maintenance
IC Equipment Thin-Layer cell
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Replace the spacer as follows:
Replacing the spacer
Prerequisites:
￭ The measuring cell is disassembled.
￭ The new spacer is dry, clean and lint-free.
You will need a 2.5 hexagon key and a pair of tweezers to replace the
spacer.
Wear latex gloves when replacing the spacer.
1 Positioning the spacer
￭ Hold the measuring part in your hand as shown in Figure 3, page
16.
￭ Use tweezers to place the new spacer on the measuring part.
The straight side of the spacer must lie on the straight edge of the
measuring part and the four small holes in the spacer must be
aligned precisely to the boreholes.
Use your fingertips to hold the spacer in correct position.
2 Attaching the base part
￭ Insert the four screws into the boreholes on the base part.
￭ Carefully place the base part of the measuring cell:
The straight edge of the base part must lie on the straight edge of
the measuring part and the four screws must fit precisely in the
four boreholes.
Take care to ensure that the boreholes on the base part, the spacer
and the measuring part are aligned precisely with one another.
3 Tightening the screws
Tighten the four screws evenly in cross-over sequence with the hexa-
gon key.
5.2.4 Cleaning the measuring cell
The auxiliary electrode can be readily cleaned when the working electrode
has been removed from the cell.
Cleaning the auxiliary electrode
Prerequisites:
￭ The electrode cables are unplugged.
￭ The reference electrode has been removed from the measuring cell.