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

(1)通过对10位、200 MS/s通用数字记录仪的改进，使其在幅值和时基的非线性、脉冲标度因数、内噪声电平、干扰等方面达到国际标准（IEC）1083-1的要求。“高压脉冲试验测量用数字记录仪。“（2）研制了数字记录仪校准脉冲发生器。发电机能够产生IEC 1083-1中规定的全雷电和操作冲击电压。其峰值和时间参数的测量精度均满足IEC 1083- 1的要求。通过计算机模拟，详细地分析了数字记录器内部噪声对测量精度的影响。为了消除内部噪声引起的测量误差，提出了新的校正方法。该方法显著提高了雷电冲击电压和操作冲击电压数字记录仪的测量精度，并将上述数字记录仪与1991年研制的基准电压分压器和分流器连接，构成了高质量的冲击电压和电流基准测量系统。

(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.