Technical Specifications

ValVueFF Software Interface to FVP
150
GE Energy
Measurement Parameters
To open the Signature Setting dialog box (Figure 128):
❑ Click Standard Actuator Signature and then Change Measurement Setting.
There are three measurement setting parameters (Figure 128):
Figure 128 Standard Actuator Signature Settings Dialog Box
Recommended Scan
Time (seconds)
The value is read only and does not affect the measurement. The
value is calculated from the tuning parameters. It is used as a
guide for setting Scan Time (in seconds).
To get the result in shorter period, decrease the Scan time. To get
more specific information, choose a longer time to get more sam-
ple points.
Scan Time (seconds) This determines the time for round trip of the measurement. You
can set any value within the valid range: 20 to 3600 sec. Refer to
the “Extended Actuator Signature” on page 151.
Deviation margin (%) The measurement is performed in Proportional control algorithm.
In this measurement, deviation between the set point value and
the position value can occur due to the non-linear characteristic
existing in the control system. Some examples are I/P hysteresis
and valve deadband. This value does not need to be changed
from the default value. However, if the stem position did not reach
the desired point then increase this value, or if stem position far
exceeds the desirable point, then decrease this value to make the
measurement correct. The valid range is 0 to 500%.