Technical Specifications

ValVueFF Software Interface to FVP
154
GE Energy
CAUTION The FVP must be OOS.
❑ Cyclical w/o Deadband- Click this radio button to enable
cyclical testing. Cyclical testing moves the valve from initial
set point to destination set point cycle and cycles again.
This selection activates the Cycle field at the bottom of the
dialog box. enter the number of cycles for performing the
test. 2-way testing is unavailable.This test starts from 50%
and uses a fixed step size over a user-set number of
cycles. If there are N steps from initial set point to
destination set point, it:
❑ Moves N steps in increasing position.
❑ Moves 2N steps in decreasing position.
❑ Moves N steps increasing to the 50% position.
❑ Cyclical w/ DeadbandDead Band Test - Click this and the
Cycles field is set to 1. This test discovers the range where
the setpoint increases but the valve does bot move. The
dead band formula is: Dead Band = (number of steps the
valve does not move) * Step Size.
❑ Resolution - Click this to enable resolution testing, which
moves the valve from initial set point for a small step
toward the destination set point, and doubles the step in
the next time until it reaches the destination set point.
2-way testing is unavailable.
Initial Set Point The base position for step test from which the set point changes
by the amount of the step size. If the step test uses the
pre-defined patterns (Cyclical and Resolution), the value should
be 50.
Dest. Set Point The destination position. If it is in Resolution patterns step test, it
is the last cycle’s destination position.
Step Size The size of each step change. Used for multiple step response
test only. If the step size is 0, the multi-step test becomes the sin-
gle step test in the range specified by the Initial Set Point and the
Dest. Set Point.
❑ For Cyclical, the step size is the range specified by the
start point and the end point if the step size is 0.
❑ For Resolution, the step size means the first step size (in
the first cycle), The default value is 5% if the step size is 0.
Sampling Rate (ms) The sampling rate of each step: range is 20 to 1000 ms.