单加热丝热电变换器组成的交直流热电比较仪在校验功率表时,存在以下几个问题: 1.在进行电流平衡时,是使△E=0,即 E_1=K_1I_1~2=E_2=K_2I_2~2从而达到使左右两个热电变换器的工作点重合,亦即使I_1=I_2,K_1=K_2。而在实际校验功率表时,有△E=K_pP_x,只要P_x不为零,就有△E≠0,所以,E_1≠E_2,I_1≠I_2,K_1≠K_2; Single heating wire thermoelectric converter composed of AC and DC thermoelectric comparators in the calibration power meter, there are the following questions: 1. In the current balance, it is △ E = 0, E_1 = K_1I_1 ~ 2 = E_2 = K_2I_2 ~ 2 so as to achieve the work of the two thermoelectric converters coincide, even if I_1 = I_2, K_1 = K_2. However, when the power meter is actually calibrated, there is △ E = K_pP_x. As long as P_x is not zero, ΔE ≠ 0, so E_1 ≠ E_2, I_1 ≠ I_2, K_1 ≠ K_2;