press any key

• Press set key at one sec is setting control value . it is set value display s number after display s - u , press or key can recompose set value , range is 1560 , again press set key is backing out display the measure value . it can automatism backing out display the measure value after three sec , if it is dont press any key
  1按set键1s设置控制值，显示s - p后显示的数字为设定值，按上下键可修改设定值，范围为- 50100 ，再次按set键返回显示测量值，不按任何按键3s后也可自动返回显示测量值。