How to effectively maintain an acidometer
Acidometer is a commonly used instrument and equipment. It is mainly used to accurately measure the pH value of liquid media. When paired with a corresponding ion selective electrode, it can also measure the ion electrode potential MV value. It is widely used in industry, agriculture, scientific research, environmental protection and other fields. This instrument is also a necessary inspection equipment for QS and HACCP certification in food factories and drinking water plants. So, how to effectively maintain the acidometer?
If you want to effectively maintain your acidometer, you should start from the following aspects:
1. During measurement, the lead wire of the electrode should remain stationary, otherwise the measurement will be unstable.
2. The power supply used by the instrument should be well grounded.
3. The instrument uses MOS integrated circuits, so the circuit iron should be well grounded during maintenance.
4. When calibrating the instrument with a buffer solution, ensure the reliability of the buffer solution. Do not mix the wrong buffer solution, otherwise it will cause errors in the measurement results.
5. The input end of the instrument must be kept dry and clean. When the instrument is not in use, insert the Q9 short-circuit plug into the socket to prevent dust and water vapor from infiltrating.
6. The electrode converter is specially designed for use with other electrodes. Pay attention to moisture and dust protection at ordinary times.
Under what circumstances does a pH meter need to be recalibrated?
When there is a large difference between the solution temperature and the calibration temperature of the pH meter.
The pH meter electrode has been exposed to the air for too long, such as more than half an hour.
The positioning or slope regulator of the pH meter is malfunctioning;
After the pH meter measures a solution that is too acidic (pH<2) or too alkaline (pH>12);
After the pH meter has been replaced with a pH electrode;
When the pH value of the solution measured by the pH meter is not in the middle of the solution selected during two-point calibration, and is far away from 7pH.
