①The control cabinet is installed on a metal wide frame about 50-250mm high from the ground . 　　

②The control cabinet should be installed in a room that complies with Article 　　4.5

③The distance from the dosing point to the sampling point is about 8-10 meters, which is suitable for fast adjustment systems. For large lag adjustment systems, the distance from dosing to the sampling point can be unlimited, but it may be suitable. 　　

④ rapid adjustment of a sensor system monitors ( or whole ) should be close to the sampling point, the sampling tube over about 5--8mm, a length of about 2--4 meters, large retardation of the entry system is not critical 　　

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