GE EVT-Pro 2.0, Operation And Technical Manual, Page: 25 / 60

SECTION 16
EVT PRO 2.0
®
LOAD CELL UTILIZATION
Figure 16.1
– Example of Cylinder Utilization
SECTION 17
INFLUENCE OF PROCESS PRESSURE UPON ACCURACY
SECTION 18
EVT PRO 2.0 ® LOAD CELL ACCURACY
As previously stated, the
EVT PRO 2.0
®
utilizes
“married” load cells and hydraulic lifting
cylinders to provide greater resolution of data points and accuracy. This principle is
illustrated in the software as shown in Figure 16.1 below.
A "rule of thumb" is to select the cylinder with the most green space showing. This
method will ensure the greatest data point resolution and accuracy.
During in situ testing, accuracy increases when the difference between process pressure and
PRV set pressure is minimal. However, technicians and plant personnel must realize that the
possibility of putting a PRV into full lift also increases when process pressure is close to PRV
set pressure.
Do not conduct in situ testing when the process pressure is less than 50% or greater
than 90% of the PRV set pressure. See Warnings in Section 2, page 3.
The transducers provided with the
EVT PRO 2.0
®
are calibrated in a dedicated test facility and
are delivered with a certificate of calibration . The accuracy of the force transducers is
greater than 0.1% F.S. To maintain this high level of accuracy, GE Energy/Consolidated®
requires the
EVT PRO 2.0
®
be calibrated on an annual basis. They are to be returned for
calibration per instructions found under the
EVT PRO 2.0
®
Tab on GTC.Net.
EVT PRO 2.0
®
Operations and Technical Manual (Rev 1.0
– 2016)
NOT FOR COPY OR DISTRIBUTION Page 21