%EB%B2%BD%EC%B2%B4 %EC%97%B4%EA%B4%80%EB%A5%98%EC%9C%A8 %EC%B8%A1%EC%A0%95%EC%97%90 %EC%93%B0%EC%9D%B4%EB%8A%94 %EC%97%B4%EB%A5%98%EC%84%BC%EC%84%9C calibration %EB%B0%A9%EB%B2%95 %EC%A7%88%EB%AC%B8 %EB%93%9C%EB%A6%BD%EB%8B%88%EB%8B%A4.