EN 60534-9:2007

FOREWORD
1 Scope and object
2 Normative references
3 Terms and definitions
4 Symbols
5 General test procedures
  5.1 Test valve conditions
  5.2 Test system
  5.3 Measuring instruments
  5.4 Process variable
  5.5 Nominal test position
6 Examples of step response
7 Tests specified for each of three test
  environments
  7.1 Bench tests
  7.2 Laboratory tests
  7.3 In-process tests
8 Detailed test procedures
  8.1 Baseline test
  8.2 Small-step test
  8.3 Response-time tests
9 Presentation of test results
  9.1 General information
  9.2 Test results
      9.2.1 Baseline test
      9.2.2 Small-step test
      9.2.3 Response-time tests
Annex A (informative) - Sliding friction measurement
Annex ZA (normative) - Normative references to
      international publications with their
      corresponding European publications
Bibliography

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.