Maintenance and cleaning
16
Alternatively, you can use air saturated water to create a
100% a.s. oxygen solution. Aerate therefore water with an
air pump and diffusor stone. After several minutes, the water
should be equilibrated with the air. This equilibrated water
has by definition an oxygen concentration of 100% air
saturation.
Attention! By using this method, inaccuracies can
be created by:
The air is injected with a pressure
exceeding atmospheric pressure. Therefore, the
partial pressure of O
2
can also be slightly increased.
The exact timing, when 100% saturation is achieved
is hard to determine, since oversaturation due to the
injection with overpressure can occur.
Oxygen depleting substances in the water can be
present so that 100% a.s. may not be achieved.
Due to these risks, we recommend the calibration on water-
saturated air.
The calibration should be carried out at the same
temperature like in the measured water.
Summary of Contents for O2S-20-SC
Page 1: ...Oxygen Sensor O2S Manual...
