INDUSTRIAL-PROCESS CONTROL SYSTEMS - METHODS OF EVALUATING THE PERFORMANCE OF VALVE POSITIONERS WITH PNEUMATIC OUTPUTS
International Electrotechnical Committee
FOREWORD
1 Scope and object
2 Normative references
3 Definitions
4 General conditions for tests
4.1 Environmental test conditions
4.1.1 Recommended limits of ambient
conditions for test measurements
4.2 Supply conditions
4.2.1 Reference values
4.2.2 Tolerances
5 General testing procedures
5.1 Test equipment
5.2 Test methods
5.3 Testing precautions
5.4 Basic test arrangement
5.4.1 Positioner tested independently of
an actuator
5.4.2 Positioner tested in conjunction with
an actuator
5.5 Initial setting-up
5.5.1 Positioner tested independently of an
actuator
5.5.2 Positioner tested in conjunction with
an actuator
6 Test procedures
6.1 Gain characteristic
6.1.1 Positioner tested independently of an
actuator
6.1.2 Positioner tested in conjunction with
an actuator
6.2 Travel characteristic
6.2.1 Positioner tested independently of an
actuator
6.2.2 Positioner tested in conjunction with
an actuator
6.3 Accuracy related terms
6.3.1 Inaccuracy
6.3.2 Measured error
6.3.3 Conformity error in linearity error
(non-conformity/non-linearity)
6.3.4 Hysteresis
6.3.5 Repeatability error (non-repeatability)
6.4 Dead band
6.4.1 Dead band - Input path
6.4.2 Dead band - Travel path
6.5 Airflow data
6.5.1 Airflow characteristic
6.5.2 Steady-state air consumption
6.6 Effects of influence quantities
6.6.1 Supply pressure
6.6.2 Ambient temperature
6.6.3 Relative humidity
6.6.4 Mounting position
6.6.5 Mechanical shock
6.6.6 Vibration
6.6.7 Power-frequency magnetic field
6.6.8 Radiated electromagnetic field
interference
6.6.9 Electrical fast transients (burst)
6.6.10 Surge voltage immunity
6.6.11 Series mode interference
6.7 Input over-range
6.7.1 Positioner tested independently of an
actuator
6.7.2 Positioner tested in conjunction with
an actuator
6.7.3 Common text for positioners tested
independently of an actuator/with an
actuator
6.8 Drift
6.8.1 Start-up drift
6.8.2 Long-term drift
6.9 Accelerated life test
6.9.1 Positioner tested independently of an
actuator
6.9.2 Positioner tested in conjunction with
an actuator
6.9.3 Common test for positioners tested in
conjunction with/independently of an
actuator
6.10 Dynamic response
6.10.1 General considerations
6.10.2 Basic test arrangement
6.10.3 Frequency response
6.10.4 Step response
7 Other considerations
7.1 General
7.2 Safety
7.3 Degree of protection provided by enclosures
7.4 Documentary information
7.5 Installation
7.6 Routine maintenance and adjustment
7.7 Repair
7.8 Protective finishes
7.9 Design features
7.10 Variants
7.11 Tools and equipment
8 Test report and documentation
Gives tests that are designed to determine the static and dynamic performance of single-acting or double-acting positioners. May be applicable to positioners which receive standard analogue input signals and have a pneumatic output. These are specified in IEC 60381 and IEC 60382. Methods of evaluation given are intended for use by manufacturers to determine the performance of their products, and by users, or independent testing establishments, to verify manufacturers performance specifications. Definitions of positioner characteristics, elements, and actions, to specify uniform methods of measuring performance errors and effects of influence quantities on those characteristics and to describe methods of reporting and evaluating the results of the measurement data obtained.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 65 |
