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Discussion on maximum permissible error of precipitation sensor in different types

Sun Yan,Bian Wenchao,Guo Ruibao (Atmosphere Observation Technology Center of Shandong,Jinan 250031)  
To solve the problem that the reject rate of the SL2 precipitation sensor manufactured by Tianjin Meteorological Instrument Works is on the high side,technical parameters and working principles of precipitation sensor in different types are researched,according to the on-the-spot calibration data of automatic weather station from 2004 to 2006 in Shandong.On the condition that standard spheres give the same water cubage,the standard display value of precipitation sensor with different calibers are quite distinct.For the precipitation sensor whose standard display value is not 10mm,its measurement error should be converted to 10mm precipitation error firstly,then use the maximum permissible error given by On-the-spot Calibration Method of Automatic Weather Station to judge its qualification.
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