Hach 2200 PCX Manuel D'utilisation page 22

1. Set the instrument to off.
2. Remove the sample line quick-disconnect fitting at the inlet port.
3. Lubricate the brush with the cleaning solution.
4. Move the cleaning brush up through the bottom flow path.
5. Carefully move and twirl the brush 15 to 20 seconds in the bottom fitting.
6. Connect the inlet flow connector again and flush the cell.
7. Set the instrument to on again.
8. Make sure that the clean sensor fail indicator goes off within one sample period, approximately
after 30 seconds.
If the clean sensor fail indicator stays on, complete the stain cleaning procedure. Refer to
Complete a stain cleaning
Figure 11 Cell cleaning
Complete a stain cleaning
Complete the stain cleaning procedure when the cell cleaning procedure was not successful and the
clean sensor fail indicator is still on. The cell is possibly chemically stained.
1. Disconnect the instrument from the normal on-line flow path.
2. Select the applicable contamination and use the applicable solution for the cleaning.
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