定义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，以及在三种替代环境下执行响应测试和评估测试结果的方法和标准:台架测试、实验室测试和过程中测试。本标准未定义过程控制可接受的控制阀性能，也未限制任何应用中控制阀的选择。

Defines the testing and the reporting of step response of control valves that are used in throttling closed loop control applications, as well as methods and criteria for performing response tests and evaluating test results for three alternative environments: bench testing, laboratory testing, and in-process testing. This standard does not define the acceptable control valve performance for process control nor does it restrict the selection of control valves for any application.