This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
d 如题
不可以
可以通过外部电路 把负电压抬升到正的再测。测量结果减去抬升电压即可。
不可以直接测量的,需要经过信号调理电路才可以