DVM is not accurate in measuring resistance below 20 ohm due to the lead resistance, unless it is a 4 wired ohm meter.
数字式电压表在测量低于20欧姆的电阻时﹐会因为引脚的电阻而使测量不准确。除非它是一个四线欧姆表。
Resistivity is determined by measuring resistance, then converting to surface or volume resistivity by taking geometric considerations into account.
电阻率的测量方法是测量电阻,然后再考虑几何因素将其变换成表面电阻率或体积电阻率。
Basing on test datas of measuring resistance of sinking pipe, the experience factor which can be applied in the soil of Shanghai is brought forward.
根据所做的试验导出了适用于上海地区土质情况的经验系数。
应用推荐