Abstract：Since the automatic weather station putting into the operation,the calibration of the rain gauge has been adopting one-way adjustment method.During the process of rain gauge calibration,it found that the heavy rain intensity is 9.4 mm and the light rain intensity is 10.4 when using the 10 mm rainfall standard to measure the heavy and light rainfall intensity.It appears the phenomenon of discretization error.The error of heavy rainfall intensity is corrected by conventional adjusting the screw of tipping bucket.For the error of light rainfall intensity,it can be solved by adopting two-way adjustment for the screw on the top of tipping bucket and flip angle.
2015, Vol. 32 
