Research on development of a high qualoty digital recorder for impulse measurements and the performance test methods

(1)对10位、200MS/s的通用数字记录仪进行改进，使其满足国际标准（IEC） 1083-1对幅量、时基非线性、脉冲比例因子、内部噪声级、干扰等方面的要求。高压脉冲试验测量用数字记录仪(2)研制了数字式记录仪标定脉冲发生器。该发电机能够产生IEC 1083-1中规定的完整、封闭的雷电和开关脉冲电压。它们的峰值和时间参数的精度满足IEC 1083-1的要求。通过计算机仿真详细验证了数字记录仪内部噪声对测量精度的影响。为了消除由内部噪声引起的测量误差，提出了新的校正方法。该方法显著提高了数字记录仪对雷电和开关冲击电压的测量精度。通过将上述数字记录仪连接到1991年由autors开发的参考分压器和电流分流器，开发了高质量的脉冲电压和电流参考测量系统。

(1) By improving a 10 bit, 200MS/s digital recorder for general purposes, a high quality degital recorder which has satisfied the requirements on non-linearities of amplotude and time base, impulse scale factor, internal noise level, interferance and so on of International Standard (IEC) 1083-1. "Digital recorders for measurements in high-voltage impulse tests."(2) A calibration pulse generator for digital recorders was developped. the generator is enable to generate full, copped lightning and switching impulse voltages specified in IEC 1083-1. The accuracies of of their peak values and time parameters are satisfied the requirements of IEC 1083-1.Influence of the internal noise of digital recorders on the measuring accuracy was charified by computor simulation in detail. In order to eliminate the measuring errors due to the internal noise, new correction methods were proposed. The method increased remarkably the measuring accuracy of digital recorders for lightning and switching impulse voltages.High quality reference measuring systems for impulse voltages and currents have been developped by connecting the digital recorder mentioned above to reference voltage diveders and current shunts developped by autors in 1991.