Dissolved Oxygen Measurement; Before Starting; Methods Of Measurement; Making The Measurement - XS OXY Series Manual

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4. Dissolved oxygen measurement

4.1 Before starting

In order to reduce measurement errors and achieve the greatest possible accuracy, observe the following
rules before you begin:

The sensor must be calibrated

The sensor must be vertical with the membrane downwards

Remove the protective cap

The sensor must be at the same temperature of the sample to be analysed, if necessary leave the
probe immersed in the sample until the thermal equilibrium is reached

4.2 Methods of measurement

This instrument can work in two measurement modes:

Dissolved O

Dissolved O
mg/L = ppm
During measurement press

4.3 Making the measurement

Remove the electrode from the protective cap, rinse it with distilled water, blot with paper towels and
immerse in the solution to be analysed, stir gently and wait until the stability of value, when the icon
appears on the display, take the reading.

4.4 Compensation of the barometric pressure

Since the measurement of the partial pressure of dissolved oxygen is also related to barometric pressure,
this instrument, thanks to the integrated barometric sensor, is able to compensate each minimum
variation.
To view the barometric pressure measured by the instrument, press the
and scroll through the measurement parameters: %O
Saturation expressed in %
2
Concentration expressed in mg/L, equivalent of ppm
2
key to change measuring method.
 mg/L  mbar.
2
key during measurement
OXY 70
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