In recent years, atmospheric samplers have been widely used in atmospheric environmental monitoring and environmental impact assessment. The metrology department is responsible for regularly verifying atmospheric samplers to ensure the accuracy and stability of collected data. The atmospheric sampler operates in a harsh environment and is prone to damage during use, resulting in frequent malfunctions during calibration.

        When using an atmospheric sampler, the following precautions should be taken:

        1. General instruments are not explosion-proof. Do not use in areas with explosion hazards.

        2. When the instrument is parked for a long time, the battery inside the machine should be removed and powered on for half an hour to remove moisture from the machine.

        3. When using, the inlet and outlet of the absorption bottle should not be reversed to prevent the absorbent from being absorbed by the pump.

        4. Before sampling, fill the absorption bottle with the same amount of water as the sample absorption liquid. After connecting the air circuit to the hose, adjust the flow rate to the actual flow rate of the sample to avoid flow errors caused by on-site debugging.

        5. During the sampling process, the filter is connected to the filtered air, as dust, aerosols, acids, and alkalis in the atmosphere are easily sucked into the pump by the airflow, and these impurities are also attached together. It will affect the flow rate, pump pressure, and stability of the diaphragm pump. The technical performance of the instrument will decrease. On the other hand, when the solution is sucked in, once the solution flows through the filter fibers, the filter fibers will expand and block the intake channel, preventing the solution from further flowing into the diaphragm pump, providing good protection for the pump. If there is inverted solution, just clean the filter and replace the filter fiber and foam plastic block to solve the problem.

        6. Place the instrument in the sampling state, rotate the adjustment knob back and forth, observe whether the flow meter is flexible, whether there is a dead zone, and whether the float is stable.

        7. Occasionally, during operation, if an acidic or alkaline solution is accidentally poured in, immediately rinse it with distilled water several times, let the pump start intermittently for a period of time, and then inject several times (outlet) of anhydrous ethanol solution. When cleaning, remove the pump from the buffer. Subsequently, the buffer, flow meter, etc. are cleaned separately until they become dry.

        When the instrument is not in normal use, it can return to normal after half an hour.

        8. Frequent or prolonged use also requires replacing the filter element and the filter block in the filter element to prevent dirt from entering the pump through the filter, increasing air resistance, and reducing flow rate.

        9. When the instrument is used for a long time or the flow meter is not flexible or stable, the flow meter should be cleaned to ensure that the entire machine is in good working condition.

        10. When the desiccant inside the dry bottle changes from blue to red, it should be replaced promptly. After replacing the desiccant, connect the pipeline system without air leakage.