How to select a calibration gas for a gas analyzer?
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This post was last edited by zhaohh3211 on 2015-7-22 20:46. How to choose a calibration gas for a gas analyzer? Oxygen analyzer 0-2%: how to select a calibration gas? Is standard gas simply bottled gas at 2% concentration? Is it sufficient to choose zero gas and standard gas? May I ask which are the domestic manufacturers of standard gases, or where can they be purchased?
Accuracy, as well as what the interfering gases are – analytical instruments must clarify these aspects.
Generally, zero-point gas, 50%, and 100% are sufficient
Zeroed at 100% nitrogen, scaled at 2% oxygen
It should be configured using zero-point gas (preferably nitrogen with 4 nines purity), 50% scale gas, and 100% scale gas. As for procurement, the project I am working on is not yet at the KOM stage, so I’m not sure about the brand; I will give an answer once it’s determined. I’d also appreciate it if other experts could add their insights
If it's a magneto-oxide, zeroing and range are sufficient. If it’s laser oxygen measurement, you need to ask the manufacturer, as methods vary from one company to another. Zero-point gas: 99.995% nitrogen, in an 8L aluminum alloy cylinder. Range gas: 2% oxygen, in an 8L aluminum alloy cylinder. This is used for calibration; it isn’t needed on a regular basis, so an 8L cylinder is sufficient. Pressure relief valves are generally not provided by gas manufacturers; they need to be installed separately. Good domestic manufacturers of calibration gases include Beifen Helipu and Dalian Datete. You can directly search for the manufacturer online to make a purchase, or buy from an integrator.
For magnetoxygen, use high-purity nitrogen as the zero-point gas, and 2% oxygen can be used as the range gas