triOS Dissolved Oxygen, Operating Instructions Manual

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D01-903en201912 Manual Dissolved Oxygen
Malfunction and Maintenance
// Dissolved Oxygen
Us
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Calibr
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Calibr
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M
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M
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M
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M
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Commissioning
Commissioning
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Inf
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Technical
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Technical
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6 Malfunction and Maintenance
The maintenance schedule shows minimum intervals for regular maintenance tasks. Perform maintenance tasks more fre-
quently for applications that cause electrode fouling.
• The sensor must always be kept clean, particularly in the area around the optical membrane. The presence of a biofilm on
the membrane cap can lead to measuring errors.
• A dirty membrane should be cleaned with warm, soapy water. A soft sponge should be used for cleaning (not an abrasive
scouring sponge).
• If the sensor is put out of operation, it should be rinsed prior to being stored, and the protective cap should be fitted with
the protective case and a moist absorbent surface (like cotton).
6.1 Cleaning and Upkeep
Rinse meticulously the sensor and the membrane with clear water. If deposits like biofilm or mud persist, wipe the membrane
gently with a sweet cloth or an absorbent paper.
NO
Do not disassemble the probe for maintenance or cleaning.
NOTICE
Avoid touching the membrane, because it can become scratched or dirty. If this happens, the func-
tionality of the device can no longer be guaranteed.
NOTICE
6.2 Maintenance and Inspection
It is advisable to regularly clean the sensor in a water-sulphite solution with a sulphite concentration of < 2 %, and to subse-
quently check the zero point (0 % saturation).
If the zero point is moved, a complete two-point calibration must be carried out.
For the Titanium version clean the body of the sensor by means of acetone (do not use methylated
spirit, ethanol or methanol).
NOTICE