Technical Specifications

ValVueFF Software Interface to FVP
114
GE Energy
4. Select Yes.
5. Select Span Calibration.
6. Change the Target Pos value by:
a. Entering a number or by incrementing until the valve is in the 100% open position,
using the same procedure as in zeroing.
b. Referring to the mechanical travel indicator on the valve and select the Apply
Calib. A dialog box appears to confirm that you want to apply the calibration.
c. Selecting Yes.
d. Selecting 50% Calibration to apply a correction for non-linearity.
e. Moving the valve until it is at the mechanically indicated 50% position, using the
same procedure as in zeroing.
f. Referring to the mechanical travel indicator on the valve.
g. Selecting the Apply Calib button. A dialog box appears to confirm that you want
to apply the calibration.
h. Selecting Yes. This provides non-linearity correction with two line segments
(Figure 94), in which 60 is entered in the Target Pos. Be advised that 60% is an
extreme example of correction.
Figure 94 Non-linearity Travel Correction
CAUTION Applying a correction to the 0% position calibration can alter
the effect of other limits and settings. The Tight Shutoff Below
parameter may need to be reconfigured. Applying a correction
to the 100% span position calibration can alter the effect of
other limits and settings. The Full Open Above parameter may
need to be reconfigured.