Proof Test Steps - GE Masoneilan SVI II ESD Installation And Maintenance Manual

Proof Test
You can also manually run a proof test. The objective of proof testing is to detect failures
within an SVI II ESD and ESD valve that are not detected by any automatic diagnostic of the
system. Of main concern are undetected failures that prevent the safety instrumented
function from performing its intended function.
Proof testing frequency or proof test interval, has to be determined in reliability calculations
for the safety instrumented functions to which SVI II ESD is applied. The proof tests must be
performed more frequently or as frequently as specified in the calculation in order to maintain
the required safety integrity of the safety instrumented function.
The following proof test is recommended. Report any detected failures that compromise
functional safety to the factory.
Step
Read the SVI II ESD data record using a HART
1
faults before proceeding.
Bypass the valve, or isolate or take other appropriate action to avoid a false trip, following company Man-
2
agement of Change (MOC) procedures
3 Inspect the SVI II ESD for dirty or clogged ports and other physical damage
De-energize the SVI II ESD and observe that the actuator and valve move. Energize the SVI II ESD after the
4
valve has moved to its full stroke length.
Inspect the SVI II ESD for dirt, corrosion or excessive moisture. Clean if necessary and take corrective
5
action to properly clean the air supply. It has to be done in order to avoid incipient failures due to dirty air.
6 Record any failures in your company's SIF inspection database. Restore the loop to full operation.
7 Remove bypass or otherwise restore normal operation
This test detects approximately 99% of possible DU failures in the SVI II ESD (Proof Test
Coverage).
The person (s) performing the proof test of an SVI II ESD must be trained in SIS operations,
including bypass procedures, maintenance and company Management of Change
procedures. No special tools are required.
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=GE Oil & Gas
Table 1 Proof Test Steps
Action
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handheld device or ValVue ESD software. Solve any active
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