1. The testee stands barefoot on the bottom plate of the altimeter and stands at attention, with his heel, sacrum and scapula close to the column of the altimeter.
2. The surveyor can stand on the right or left side of the examinee, adjust his head to the level of the lowest point of the upper edge of tragus and the lower edge of orbit, and move the horizontal plate of altimeter to the top of the examinee's head to make it tight, so as to measure the birth height.