单键可调电子表，平时为工作状态，按键不足一秒，接键为换屏‘S’。按键超过一秒移位则进入调整状态‘C’，而且调整光标在秒个位开始。调整状态时，按键不足一秒为光标移动‘M’，超过一秒则为调整读数，每0.5秒加一‘A’，直到松键；如果10秒无按键则自动回到工作状态‘W’。-Speed adjustable electronic form, usually as a working condition, less than one second key, then key is to screen for the ' S' . More than a second shift key is the state of adjustment ' C' , and adjust the cursor in the second a bit first. Adjust the state, less than one second for the cursor keys move the ' M' , more than a second reading was adjusted, every 0.5 seconds plus one ' A' , until the loose bond　10 seconds if no key is automatically returned to working status ' W'　.