1. Inaccurate readings

  - Reason: The rotor flowmeter is affected by temperature, pressure and other external environment, which can easily lead to reading deviation. In addition, if the equipment is not calibrated for a long time, the accuracy will be reduced.
  - Solution: Calibrate the flowmeter regularly and try to maintain a stable operating environment. Check the readings before operation to ensure that the flowmeter is within the normal range.

2. Flow meter clogging

  - Cause: After long-term use, the pipeline may be blocked due to impurities, gas residues, etc., affecting the gas flow.
  - Solution: Clean the flow meter piping regularly to ensure smooth gas flow. In addition, use a high quality gas source to minimize the accumulation of impurities.

3. Flow meter drift

  - Cause: Temperature or pressure fluctuations can cause small changes in the position of the rotor, resulting in drifting readings.
  - Solution: Try to maintain a constant temperature and pressure environment during actual use, and check and calibrate the equipment periodically.

4. air leakage

  - Cause: Loose or aging connection pipes or joints of the flowmeter may cause air leakage, affecting the measurement accuracy and safety hazards.
  - Solution: Regularly check the pipe connections to ensure that there is no air leakage. If air leakage is found, replace the aged or damaged parts immediately.

5. Incorrect Nitrous Oxide/Oxygen Ratio

  - Cause: If the gas supply pressure is not stable, or the flow meter is not properly adjusted, it may lead to an imbalance in the ratio of nitrous oxide and oxygen, which may affect the experiment or application.
  - Solution: Check the gas supply system regularly to ensure the pressure is stable. And adjust the flow rate accurately according to the demand when using.

6. Aging of equipment

  - Cause: After long-term use of the flowmeter, the internal parts will be aging, resulting in inaccurate measurement or difficult flow adjustment.
  - Solution: Replace or repair the flow meter according to the manufacturer's recommended maintenance cycle to ensure that the equipment is always in the best condition.

7. Gas contamination

  - Cause: If the gas contains moisture or impurities, it may affect the sensitivity and reading accuracy of the rotameter.
  - Solution: Use a filter to remove impurities from the gas and ensure that the gas is dry to avoid the effects of moisture.

Summarizing

When operating a N₂O/O₂ two-tube rotameter, regular maintenance, cleaning, calibration, and inspection are critical steps in ensuring the accuracy and durability of the equipment.