Measuring method for bath voltage

The invention relates to the technical field of non-ferrous metal hydrometallurgy, in particular to a measuring method for the bath voltage. The method comprises the following steps that (1) liquid is newly prepared through concentrated sulfuric acid, the concentration of the sulfuric acid is 140-200 g/L, the liquid is purified, then a negative plate is corroded, and the effect that the negative plate is not damaged is achieved; (2) positive plate face crystal is cleared, and a lead oxide thin film on the surface of the positive plate is not damaged; and (3) the bath voltage is accurately measured, measurement is accurate to the bath voltage of each bath of each series, the line voltage of each line, the center point is measured, changes of the bath voltage is accurately grasped, and electric leakage conditions are accurately found by us according to measuring results. According to the measuring method for the bath voltage, the bath voltage can be greatly lowered, and consumption of the negative plate and the