GE EVT-Pro 2.0 Operation And Technical Manual page 7

SECTION 2
EVT PRO 2.0
GE policy has always been to NOT conduct EVT testing below 50% or above 90% of set
pressure.
When testing below 50% of set pressure 2 negative possibilities exist:
When testing above 90% of set pressure, 3 negative possibilities exist:
® Operations and Technical Manual (Rev 1.0 – 2016)
EVT PRO 2.0
®
PRECAUTIONS
Keep this EVT PRO 2.0
times.
Observe and comply with recognized safety measures and obligatory
regulations regarding accident prevention and environmental protection.
Consider additional factors including, but not limited to, organization of
work, plant production schedule, and use of additional qualified personnel
when using the EVT PRO 2.0
Inspect the EVT PRO 2.0
operation and accurate test results.
The EVT PRO 2.0
the laptop (actually 2 batteries in one), and the other supplies power to the
pump assembly electronics. The average battery life of both batteries is
eight (8) hours of continuous use or 300 tests @ 15 min each. Be advised
that extreme heat or cold could degrade battery life. Use common sense
when testing with the EVT PRO 2.0
unsuitable for personal to work, then the conditions are unsuitable for use
of the EVT PRO 2.0
should use the EVT PRO 2.0
Always wear appropriate PPE when using the EVT PRO 2.0
Do NOT use the EVT PRO 2.0
dense fog, rain, sleet, slow, etc. Immediately abort the use of the EVT
®
PRO 2.0 if lightning occurs.
DANGERS OF TESTING BELOW 50% OR ABOVE 90% OF SET PRESSURE
• Potential for mechanical damage can occur as a result of too much hydraulic
force required to lift the spindle. (ASME recommends 75% inlet pressure).
• Inaccurate set point determined due to the large gap between inlet pressure and
set pressure. Set point accuracy improves as the gap between inlet pressure
and set pressure decreases.
• PRV goes full open as a result of pulling on spindle.
• Damage to equipment occurs as a result of sudden opening of the PRV.
• Safety of technicians is compromised due to sudden opening of PRV.
®
operations and instruction manual available at all
®
.
®
periodically during operation to ensure safe
®
system contains two batteries. One supplies power to
®
– if the environmental conditions are
®
also. Only trained and certified valve technicians
®
®
during periods of inclement weather, i.e.,
NOT FOR COPY OR DISTRIBUTION
®
.
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