This paper introduce in detail the principle of the calibration of resistance box by method of direct current digital voltage meter, mathematics model and the way of uncertainty evaluation.
详细介绍了用直流数字电压表法校准电阻箱的原理、数学模型及测量不确定度评定方法。
A digital multi-meter measures the output voltage of the black box.
数字万用表测量黑盒的输出电压。
This kind of water meter adopts touching electric brush to convert code position of digital code wheel of water meter into voltage signal which will be input to micro-computer in parallel.
这种水表终端采用接触式电刷将水表字轮各码位转换为电平信号，并将检测的电平信号并行输入单片机。
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