DOscan10
Dissolved Oxygen Calibration
The DOscan10 tester allows 1 or 2 points calibration. If you have selected the single point calibration in the setup menu, we recommend that you
perform a 100% saturation calibration in the air-saturated water. If the 2 points calibration is selected, the zero oxygen solution needs to be used.
During the calibration and measurement, the temperature sensor on electrode must be immersed in solution completely, the solution keeps 0.3
m/s of minimum flow rate to avoid oxygen starvation at the membrane.
Single Point Calibration - 100% Saturation
Make sure that you have selected 1 point calibration in the setup menu.
1.1 Press the
Cal
key, the display shows "100%
/
CAL1".
1.2 Hold the dissolved oxygen electrode in the air at 100% relative humidity or place the electrode into the air-saturated water for about 10
minutes. Press the
Enter
key to begin the calibration.
1.3 When the reading has stabilized, the tester will show "End" and return to the measurement mode.
2 Point Calibration
Make sure that you have selected 2 points calibration in the setup menu.
2.1 Repeat steps 1.1 through 1.2 above. When the first calibration point is completed, the display will show "0%
/
CAL2", the tester prompts
you to continue with second point calibration.
2.2 Place the dissolved oxygen electrode into the zero oxygen solution for about 10 minutes, press the
Enter
key to begin the calibration.
2.3 When the reading has stabilized, the tester will show "End". Calibration is completed.
temperature sensor
•
Performing a percentage saturation calibration will simultaneously calibrate
the corresponding mg/L (or ppm) concentration value.
•
To exit the calibration without saving calibrated values, press the
Meas
key.
