Technical Specifications

153
Step Response Test
Diagnostic Services
Step Response Test
This signature function measures the step response characteristic of the control valve
system. There are two types of step response tests: single step response test and
multiple step response test (Figure 130).
Figure 130 Step Response Setting Dialog Box
The multiple step response test consists of a series of single step response tests with a
new set point for each following test incremented by the step size, executed
consecutively in the overall user-specified range. All individual single step tests use the
same user-specified step size, except the last one which uses the step size of the
remaining portion as a unit of test.
Position data before the step change is required in order to determine the starting point.
The FVP collects 10 samples of data before the each step input is applied.
The measurement parameter is the output signal of the control valve system: Feedback
signal of FVP (Equal to FINAL_POSITION_VALUE.Value)
Measurement Setting Parameters
The measurement condition defines the following parameters:
Patterns Click this checkbox to enable Cyclical and Resolution testing: