Remove all plugs from the gas connections on the rear panel. Don’t forget to remove the plug on the detector vent connection and make sure to never pressurized the instrument. It will damage the detector. This instrument is made to work on atmospheric pressure.
Some users wish to avoid back flow from a vent header into the analyzer vent. Doing so will cause sample flow and cell pressure variation. The cell pressure will follow header pressure variation. Check valve cracking pressure is not constant. The plasma cell must work at atmospheric pressure with no backdraft. 一些用户希望避免放空汇排管气体逆流进入分析仪放空口。这样将引起样品流量和测量池压力变化。池压将随汇排管压力变化而变化。止逆阀的开启压力是不恒定的。等离子测量池必须工作在大气压力条件下，且无反向气流。
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