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目前,不少地电台站使用的测量仪器是DDC—2型电子自动补偿仪(以下简称DDC—2A)。这种仪器的突出优点是输入阻抗较高、稳定度高。但也有一个突出的缺点是仪器的高绝绻指标不易达到。尤其在雨季,往往由于种种原因使得仪器的绝缘性能严重下降,破坏了仪器的稳定性,数据起伏较大,这就是仪器漏电。仪器漏电时,除上面提到的数据突跳外,还有人体感应现象。所谓人体感应现象,就是在仪器处于工作状态时,用手抚摸仪器的裸露部分表针会有轻微的摆动。仪器漏电严重
At present, many of the measuring stations used in radio stations are the DDC-2 electronic automatic compensator (hereinafter referred to as DDC-2A). The outstanding advantages of this instrument is the higher input impedance, high stability. But there is also a prominent disadvantage is the instrument’s high absolute target is not easy to achieve. Especially in the rainy season, due to various reasons, the insulation performance of the instrument is seriously degraded, the stability of the instrument is destroyed, and the data fluctuates greatly. This is the instrument leakage. Instrument leakage, in addition to the above mentioned data jumped, there are human sensor phenomenon. The so-called human body sensing phenomenon, that is, when the instrument is in working condition, hand touching the bare part of the instrument will have a slight swing. Instrument leakage is serious