ISA 75.13 : 1996

1 Scope
2 Purpose
3 Definitions
4 Testing procedures
     4.1 Introduction
     4.2 Test unit
     4.3 Environmental test conditions
     4.4 Supply conditions
5 Static behaviour
     5.1 Measurement (calibration) cycle
     5.2 Calibration curve
     5.3 Effect of influence quantities
     5.4 Flow capacity - supply and exhaust
     5.5 Flow gain (KQ)
     5.6 Steady-state consumption
     5.7 Locked-stem pressure gain (Kp)
     5.8 Accelerated life-cycle test
6 Dynamic response
     6.1 Introduction
     6.2 Test system
     6.3 Influence of test conditions
     6.4 Test equipment
     6.5 Test procedures
7 Presentation of test results
     7.1 Supporting information
     7.2 Static behaviour test results
     7.3 Dynamic behaviour test results
Figures
1 - Calibration curve (of data from Table 1)
2 - Supply pressure influence
3 - Ambient temperature influence
4 - Relative stem motion for typical linear actuator
5 - Test arrangement for electromagnetic susceptibility
6 - Test circuit for normal mode interference influence
7 - Test circuit for common mode interference influence
8 - Typical schematic for flow capacity tests
9 - Flow characteristic curve
10 - Locked-stem pressure gain (single-acting)
11 - Locked-stem pressure gain (double-acting)
12 - Schematic of simple dynamic response test system
13 - Steady-state characteristic of element exhibiting
     dead band and effect on output
14 - Steady-state characteristic of element exhibiting
     saturation and effect on output
15 - Recommended test signals
16 - Period variation
17 - Determination of phase shift for distorted output
Tables
1 - Calibration report
2 - Vibration levels used in the absence of manufacturer's
    specifications

Defines tests aimed at determining the performance of positioners with analog input signals and pneumatic output. The evaluation method outlined defines use of an actuator of the user's or manufacturer's choice. Positioners can be single- or double- acting.