Changing of alarm and control levels on analogue signals and controllers. 改變模擬信號和控制器的警報及控制水平。
However, the level of control depends on the intended use and determines whether or not it should be calibrated or validated. 但是,對這些監視和測量裝置的控制水平取決於它的意向用途和是否需要加以校準或確認來確定的。