求高手翻译? could anybody help me with the sentence below: automatic calibration the instrument 1.ensure that no gas sample is connected to the instrument head connections. swich meter to read, or standard range if a tr modle. 2.raise the head of the instrument by hand and pump it up and down a few times, ending in the raised positon. 3.after about 1 minute check the instrument reading. 4.if the reading requires adjustment locate the automatic calibarton control, which is to be found on the front panel of the instrument ,a nd usingthe small screwdriver provided, turn the control clockwise to increase the reading(wette) or anti-clockwies to decrease it . 5.close the instrument head.查看更多