The Future Starts Now
OXY 70
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
2
Saturation
expressed in %
Dissolved O
2
Concentration
expressed in mg/L, equivalent of ppm
mg/L = ppm
During measurement press
key to change measuring method.
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
key during measurement
and scroll through the measurement parameters: %O
2
mg/L
mbar.
