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数字显示万用表与DDC—2及DDC—3自动补偿仪相比,具有功能全、体积小,重量轻、价格低廉、操作方便、抗干扰能力强、读数稳定、输入阻抗大、测量精度高等一系列优点。配备远点启动控制装置,还可用于时间域激电测量。几年来的试用表明,数字万用表取代DDC型等自动补偿仪进行自然电场法观测也是可行的,它同样具有发现异常的能力和找矿效果。下面扼要介绍它在几种直流电法工作中与专用仪器的对比。
Compared with the DDC-2 and DDC-3 automatic compensators, the digital display multimeter has the advantages of complete functions, small size, light weight, low cost, convenient operation, strong anti-interference ability, stable reading, high input impedance and high measurement accuracy advantage. With remote start control device can also be used for time-domain measurements. Trial over the years shows that digital multimeter to replace DDC-type automatic compensator for natural electric field observation is feasible, it also has the ability to find abnormal and prospecting results. Here’s a brief description of how it works with dedicated instruments in several DC methods.