The traditional power meter calibrating system usually has the shortcomings of low efficiency and large volume due to its standard voltage and current source rely on the analog amplifier.
传统的电力校表台由模拟功放向待校电表及标准表提供校表电流，造成系统效率低、体积大、重量重。
2
In order to solve the problem about the reactor period calibrating instrument, a new software signal source based on numerical calculation is presented.