Calibration method of dissolved oxygen meter
1. Using water saturated gas method;
2. When calibrated, *in ;%; way, unless there are specific requirements, avoid in ;mg/l; way;
3. Place the sensor in the moisture in the bottle, without direct contact with water, and do not completely isolate the bottle from the atmosphere;
4. Leave it for more than 15 minutes, let the water vapor become saturated, tend to balance, or the dissolved oxygen and temperature readings are stable;
5. Enter the correct atmospheric pressure value (in mmHg column);
6. The difference between the calibration stability and the measured temperature is not more than +-5°C;
7. Determine the calibration value. Dissolved oxygen meter is a very important indicator of water quality testing. A pH meter is an instrument used to measure the pH value of a solution. It is a common analytical instrument and is widely used in agriculture, environmental protection, and industry. Soil pH is one of the important basic properties of soil.
