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JP2003066008A Photoionization detector and method for continuous operation and real time self cleaning 有权
标题翻译：光电探测器和连续运行和实时自清洁方法
公开(公告)号：JP2003066008A
公开(公告)日：2003-03-05
申请号：JP2002155806
申请日：2002-05-29
申请人： Rae Systems Inc , ラエ・システムズ・インコーポレイテッド
发明人： SUN HONG T , HSI PETER C
IPC分类号： G01N27/64 , G01N27/66 , G01N33/00 , H01J41/02
CPC分类号： G01N33/0026 , G01N27/66 , G01N33/0029 , G01N33/0047 , H01J41/02
摘要： PROBLEM TO BE SOLVED: To provide a photoionization detector (PID) capable of simultaneously carrying out measurement and self-cleaning.
SOLUTION: This photoionization detector PID has a microprocessor (MP), a first gas detecting unit (DUI), and a second gas detecting unit (DU2). The MP controls the DU1 and the DU2, and it always streams environmental gas (EG) through one ionization chamber (ICh) and detains the EG in the ICh of the other DU. A UV lamp (UV) converts oxygen in the EG to ozone, and it removes contaminated substances in the ICh. When the PID has only one DU, the MP controls the DU, and intermittently interrupts the flow of the EG of the ICh. As for measurement of real time self-cleaning and concentration of volatile gas (VG) by the PID, the PID measures the concentration of the VG by streaming the EG through the ICh of the DU1, and the EG passing through the ICh of the DU2 is hermetically sealed in the inside to be used for self- cleaning. The UV converts oxygen contained in the EG in the ICh of the DU2 to ozone, and removes contaminated substances in the ICh of the DU2.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供能够同时进行测量和自清洁的光电离检测器（PID）。解决方案：该光电离检测器PID具有微处理器（MP），第一气体检测单元（DUI）和第二气体检测单元（DU2）。 MP控制DU1和DU2，它总是通过一个电离室（ICh）流出环境气体（EG），并扣留另一个DU的ICh中的EG。 UV灯（UV）将EG中的氧气转化为臭氧，并清除ICh中的污染物质。当PID只有一个DU时，MP控制DU，间歇地中断ICh的EG的流动。对于PID的实时自清洁和挥发性气体浓度的测量，PID通过DU1的ICh流动EG测量VG的浓度，EG通过DU2的ICh 密封在内部用于自洁。 UV将DU2的ICh中的EG中所含的氧转化为臭氧，并除去DU2的ICh中的污染物质。

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