故障:通以标准电流时表针在表盘左半面有负误差,右半面有正误差,中心位置时无误差,误差随偏离中心的程度加大而增多。检查:该表中间极芯位置正确,平衡重锤配重良好,游丝正常。当通以标准10μA电流时,表头指示为8.5μA。逐渐增加电流,观察表头,随着电流的增长误差逐渐减小。当标准电流为25μA时,表头指示 Fault: through the standard current table needle in the left half of the face has a negative error, the right half of a positive error, the center position without error, the error increases with deviation from the center increased. Check: The table in the middle of the pole position is correct, balance heavy weight hammer, gossamer normal. When passing a standard 10μA current, the meter indicates 8.5μA. Gradually increase the current, watch the header, with the current increases the error decreases. When the standard current is 25μA, the meter indicates