A standard rotometer style flow-meter using a floating ball is commonly used on oxygen concentrators and ozone generators to measure gas flow rates. This standard flow-meter may be used in a wide variety of applications and is therefore calibrated to read gas flow accurately at ambient temperatures and pressures of the gas passing through the flow-meter.
When the gas, either air or oxygen, passing through the flow-meter is pressurized, the flow-meter will read that flow inaccurately.
An accurate flow measurement is essential to diagnose low oxygen purity from oxygen concentrators, prevent damage to oxygen concentrators, and get accurate calculations of ozone production from an ozone generator.
Flowmeters are available that are calibrated for various different operating pressures. The flowmeters we use at Oxidation Technologies on our equipment are all calibrated at 0 psi or atmospheric pressure. This allows us to get an accurate flow reading under any pressure provided the reading is corrected for pressure without questioning the original calibration pressure of the flow-meter in use.
Why Correcting Flow-Meter Readings is Important
When dealing with pressurized gases, relying solely on the uncorrected readings from your flow-meter can lead to inaccuracies. This is especially critical in applications like oxygen concentrators and ozone generators where precise measurements are crucial for optimal performance and safety.
1. Diagnosing Low Oxygen Purity: Incorrect flow readings can make it difficult to determine if your oxygen concentrator is functioning properly. Accurate readings are essential for diagnosing issues with oxygen purity, which can affect the performance and safety of the equipment.
2. Preventing Damage to Equipment: Incorrect flow rates can lead to overworking or underutilizing your oxygen concentrators and ozone generators. Overworking can cause premature wear and tear, while underutilizing can result in inefficient operation and potential malfunction.
3. Accurate Ozone Production Calculations: For ozone generators, accurate flow measurements are necessary to calculate ozone production rates accurately. This ensures that the equipment is producing the desired amount of ozone for your specific application, whether it’s for disinfection, odor control, or other purposes.
The Correction Formula
To correct the reading of a flow-meter for pressure, you can use the following formula:
[ \text{Corrected Flow} = \text{Measured Flow} \times \sqrt{\frac{\text{PSI} + 14.7}{14.7}} ]
- Measured Flow: The flow rate indicated by your flow-meter.
- PSI: The pressure at which the gas is being measured (in pounds per square inch).
- 14.7: This constant represents atmospheric pressure in PSI.
By applying this formula, you can adjust your flow-meter reading to account for the pressure of the gas, ensuring that your measurements are accurate.
Using the Online Calculator
To make this process even easier, Oxidation Technologies provides an online calculator to correct the reading of a flow-meter for pressure. This tool allows you to quickly and accurately adjust your flow-meter readings without having to manually calculate the correction.
Simply enter your measured flow rate and the pressure (PSI) into the calculator, and it will provide you with the corrected flow rate. This can save you time and reduce the risk of errors in your calculations, ensuring that your equipment operates efficiently and effectively.
Correcting flow-meter readings for pressure is essential for ensuring the accuracy and reliability of your oxygen concentrators and ozone generators. By using the provided formula or our convenient online calculator, you can easily adjust your flow measurements to account for pressure, leading to better performance and longevity of your equipment. Visit our online calculator today to get started!
You can read more about this here: https://www.oxidationtech.com/ozone/how-to-correct-flow-reading-for-pressure.html