它定义了节流闭环控制应用中使用的控制阀阶跃响应的测试和报告。控制阀由控制阀体、致动器和任何所需附件的完整、随时可用的组件组成。最可能的附件是阀门定位器。它定义了如何在开环环境中测试、测量和报告控制阀响应特性。该信息可用于过程控制应用，以确定控制阀对控制阀输入信号的响应程度和速度。 本副本包含2008年6月勘误表的内容。

It defines the testing and reporting of the step response of control valves that are used in throttling closed-loop control applications. A control valve consists of the complete, ready-to-use assembly of the control valve body, the actuator, and any required accessories. The most probable accessory is a valve positioner. It defines how to test, measure, and report control valve response characteristics in an open-loop environment. This information can be used for process control applications to determine how well and how fast the control valve responds to the control valve input signal. The contents of the corrigendum of June 2008 have been included in this copy.