Abstract:In order to verify the suitability of the ARC100M rainfall calibrator for calibrating rainfall sensors,the uncertainty of the results of this model of rainfall calibrator was evaluated and verified based on JJG(Meteorology)0052015 Tipping Bucket Rainfall Sensor of Automatic Weather Station,JJF1059.12012 Evaluation and Expression of Uncertaintv in Measurement and JJF10332023 Rule for the Examination of Measurement Standards.Verification shows that the calibration results and measurement uncertainty of the ARC100M rainfall calibrator are similar to those of the rainfall calibration device,and the calibration results are accurate and reliable.The ARC100M rainfall calibrator can be used to calibrate rainfall sensors.