Recommendation: Rinse the optical path and measuring windows with ultra
pure water.
Allow the OTT ecoN to dry.
Polish the measuring windows with a dry lint free cloth/paper cloth/special
optical wipe.
Recommendation: Check the zero point; see Chapter 8.3.
Re-install the OTT ecoN, see Chapter 5.
8.2 Checking the OTT ecoN zero point
Recommended interval: after each cleaning;
earlier if implausible measured values occur
Required accessories:
VALtub 10 or 50 mm length; see "Accessories"
Alternative to VALtub: Suitable clean vessel in which the OTT ecoN can be
placed in a slightly inclined position
Ultra pure water (≥ 18,2 MΩcm)
Ambient temperature: 20 °C
Ultra pure water temperature: 20 °C
Note
After cleaning the OTT ecoN, do not touch the measuring windows or the
housing in the area of the optical path. Wear clean laboratory gloves to check the
zero point. If impurities are detected in the ultra pure water when checking the
zero point, the water must be replaced.
Fig. 10: Cleaning the
OTT ecoN measuring windows.
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