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伏安法测电阻的电路分为两部分:一部分为测量电路,另一部分为控制电路。1测量电路测量电路有两种接法,即内接法(见图1)和外接法(见图2),测量时为了减小系统误差,应根据待测电阻的大小选取合适的测量电路。图1图21·1内接法的误差分析采用内接法时,电流表的示数为通过待测电阻的
The volt-ampere-resistor circuit is divided into two parts: one for the measurement circuit and the other for the control circuit. 1 Measuring circuit There are two ways to connect the measuring circuit, namely the in-line method (see Figure 1) and the external method (see Figure 2). To reduce the system error during the measurement, select the appropriate measurement circuit according to the size of the resistance to be measured. Fig. 1 Fig. 21·1. Error analysis of the in-line method When using the in-line method, the current meter shows the resistance through the resistance to be measured.