5520A型多功能校准器交流电流的溯源

AC current traceability of 5520A multifunction calibrator

探讨了FLUKE公司5520A型多功能校准器交流电流的溯源问题,介绍了两种不同的校准方法,即用高准确度数字多用表直接校准和使用A40B型交流分流器配合高准确度数字多用表进行校准。简单评定了两种校准方法对交流电流校准结果的不确定度,通过对比得到解决5520A型多功能校准器交流电流溯源的解决方案。对一个交流电流校准点的校准结果不确定度评定结果表明,所提出的解决方案能够满足5520A型多功能校准器交流电流的溯源要求。

The AC current traceability of 5520A multifunction calibrator manufactured by FLUKE company is discussed in the paper. Two different calibration methods are introduced, i.e. using a high precision digital multimeter only for direct calibration, and using A40B AC current shunt with a high precision digital multimeter for calibration. The uncertainties of AC current calibration results obtained by the two calibration methods are simply evaluated. By comparing the calibration uncertainties, a solution to AC current traceability of 5520A multifunction calibrator is presented. The uncertainty evaluation results of the calibration data acquired at a AC current calibration point show that the solution could meet the AC current traceability requirement of 5520A multifunction calibrator.