Abstract：In order to enhance the accuracy and reliability of global radiation measurement data, the article selects three types of thermoelectric digital pyranometer, DFN2, DFN3, and DFN4.The gradient changes of ambient temperature were simulated using a standard temperature box to test the zero shift of the selected thermoelectric digital pyranometer.The results show that the zero radiation illuminance of DFN2, DFN3, and DFN4 thermoelectric digital pyranometer shows the same step change trend with temperature.The DFN4 type thermoelectric digital pyranometer has the smallest zero shift, with a maximum value of 2.0 W/m2.The DFN2 type thermoelectric digital pyranometer has the second highest zero shift, with a maximum value of 2.4 W/m2.The DFN3 type thermoelectric digital pyranometer has the largest zero shift, with a maximum value of 3.9 W/m2.The zero shift test results meet the requirements of GB/T 19565-2017 Pyranometer for a zero shift of ±4.0 W/m2.The research conclusion has positive significance for mastering the zero shift error of thermoelectric digital pyranometer and carrying out corresponding compensation and correction.
陈平. 热电式数字总辐射表零点偏移测试研究[J]. 气象水文海洋仪器, 2024, 41(4): 95-98.
Chen Ping. Research on zero shift of thermoelectric digital pyranometer. Meteorological Hydrological and Marine Instrument, 2024, 41(4): 95-98.
2024, Vol. 41 
