Xylem pHotoFlex/pHotoFlex Turb - Manual (Page 85)

pHotoFlex / pHotoFlex Turb Maintenance, cleaning, disposal
85 ba75491d04 07/2006
5.2 Cleaning
Occasionally wipe the outside of the meter with a damp, lint-free cloth.
Disinfect the housing with isopropanol as required.
Caution
The housing components are made out of synthetic materials
(polyurethane, ABS and PMMA). Thus, avoid contact with acetone
and similar detergents that contain solvents. Remove any splash-
es immediately.
5.2.1 Cleaning the cell shaft
If liquid is in the cell shaft (e.g. due to a spilled cell), clean the cell shaft
as follows:
Caution
Cells can contain poisonous or corrosive substances. If the con-
tent is released follow the danger warnings on the cell. If neces-
sary, take corresponding protective measures (protective
goggles, protective gloves etc.).
5.2.2 Cleaning the cells
Cells have to be clean, dry, and free of fingerprints and scratches.
Therefore, clean them regularly:
Note
Scratches in the glass change the optical characteristics of the cell and
falsify the measured value. For this reason, never use scratched cells!
1 Switch the pHotoFlex (Turb) off and pull out the power plug.
2 Rinse the cell shaft with distilled water.
1 Clean the cells inside and out with hydrochloric acid or labora-
tory soap.
2 Rinse out several times with distilled water.
3 Let them dry in the air.
4 Only hold the cells by the top or by the light protection cap so
that the optical path is not impaired.
5 Before measuring, clean the cell with the enclosed cleaning
cloth.