1. When using the instrument, it is necessary to check the gas flow rate passing through the instrument. Generally, the gas flow rate is 30/h. If the flow rate is too high or too low, it will have a significant impact on the measurement results.

2. After using the instrument for a period of time, it is necessary to replace the filter paper in a timely manner: stop the air pump and drain the filter tank.

3. It is necessary to check whether there is any air leakage in the instrument's air circuit system, whether the diaphragm of the sobbing pump is damaged, whether the sealing ring of the sampling probe is broken, and whether components such as the four-way valve and condensate are damaged

4. Clean the sampling probe and unblock the sampling hole pipeline

5. Check if the operating status of the condenser is normal. Generally, it is necessary to adjust its temperature within the range of 3 degrees Celsius

6. Check if the measuring device components are dirty and need to be cleaned in a timely manner.

1. Overall inspection: The detector should be inspected at regular intervals, usually with a signal current of DC4mA in clean air.

2. Maintenance sensor: The sensor is installed inside the instrument and generally needs to be re checked and calibrated within six months to one year of use, with the testing party providing the testing report.