9
DO Calibration in % Saturation Mode
The AMTAST
dissolved oxygen meter is able to perform either 1
or 2 points calibration.
For single point calibration,
we recommend that you perform 100%
saturation calibration in the air-saturated water. If the 2 points calibration is selected, the zero oxygen solution needs to be used.
Single point calibration - 100% saturation
1.1
Ensure that the meter shows measurement unit
“
%
”
and you have selected 1 point calibration in the setup menu. Press the
Cal
key, the meter shows
100.0%/CAL 1.
1.2
Hold the dissolved oxygen probe in the air at 100% relative humidity or place the probe into the air-saturated water for 15 minutes. Press the
Enter
key, the meter begins the calibration, the Calibration icon continuously flashing.
1.3
Wait for the reading to stabilize, the meter automatically shows END. Calibration is completed.
Single point calibration - zero oxygen
2.1
Ensure that the meter shows measurement unit
“
%
”
and you have selected 1 point calibration in the setup menu. Press the
Cal
key and the
or
key until the meter shows 0.0%/CAL 1.
2.2
Immerse the dissolved oxygen probe into the zero oxygen solution for at least 10 minutes. Press the
Enter
key, the meter begins the calibration, the
Calibration icon continuously flashing.
2.3
Wait for the reading to stabilize, the meter automatically shows END. Calibration is completed.
DO901 Portable Dissolved Oxygen Meter
