Because the rain gauges of tipping bucket type can easily ues the digital signal, the
rain gauges are widely used for the meteororological observation. In general, the
resolution of rain gauges of tipping bucket type can be categorized by the 0.1mm,
0.5mm, and 1.0mm classes. But, the error of the lipping bucket rain gauges is made by
the intensity of rainfalls and is expected to make the standard calibration method for
crror measurement. Thus, we developed the hardware of standard calibration facility for
rain gauges by weighting measurement method and proposed the standard procedure by
rainfall intensity in this study Also, we calculated the uncertainty for the rainfall
intensity and obtained useful result through the proposed calibration method.
