Electric analog switch is adopted to replace the commonly used mechanical potentiometer switch and a series of antidisturbance way is used, which improves the reliability of the diagnostic results.

• 采用轻触摸开关取代仪器面板常用的机械旋钮电位器和拨动开关、采用一系列的抗干扰措施,提高了检测结果的可靠性。