10.2
Maintenance Of The Membrane
The membrane does not require replacement as long as it remains intact.
If punctured or suspected of leaking around the edges, it must be
replaced.
Oils, fats or other greasy build-ups will reduce the sensitivity of the
sensor, eventually making it fail to calibrate. When this occurs, it may be
easier and more effective to change the membrane rather than clean it.
Please see the separate instruction leaflet supplied with the Dissolved
Oxygen sensor for details on how to change the membrane.
10.3
Sensor Storage
The Dissolved Oxygen sensor should be kept moist when not in use to
prevent the thin film of electrolyte behind the membrane from drying out.
To achieve this, the sensor can be stored with the tip in water.
Alternatively, use a wetting cap, such as those supplied with pH sensors.
For long term storage of several weeks or more, the Dissolved Oxygen
sensor is best stored dry. For the YSI sensor, remove the membrane,
pump the diaphragm (with the tip point down) until no more solution is
expelled, and fit a new membrane.
When the sensor is stored in this way, the membrane should be replaced
and the sensor refilled before use.
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