主要用于四端对LCR表、阻抗分析仪的性能测试、校准/检定，适用于工厂、学校和科研单位作精密测量及精密交/直流电阻标准。Used for performance tests of 4-terminal pair LCR meters and impedance analyzers. It is suitable to be used as precise measuring standard and precise AC/DC resistance standard for factories, colleges, and research institutes.详细指标-> Detail specification->型号　直流电阻标称值最大允许误差温度系数SB2019-1Short termination------SB2019-2Open termination------SB2019-61Ω±0.1%(DC)±15×10-6/℃SB2019-710Ω±0.02% (DC)±5×10-6/℃SB2019-8100Ω±0.02% (DC)±5×10-6/℃SB2019-91kΩ±0.02% (DC)±5×10-6/℃SB2019-1010kΩ±0.02% (DC)±5×10-6/℃SB2019-11100kΩ±0.02% (DC)±5×10-6/℃SB2019-121MΩ±0.02% (DC)±5×10-6/℃注：工作频率均为DC～13MHz