Emerson EL-O-Matic F Series Safety Manual page 13

SIL Safety Manual
DOC.SILM.EF.EN Rev. 1
NOTE:
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The procedure can be performed manually or automatically. In the following,
for both cases, the following points are listed:
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Parameters to be measured:
The following parameters have to be measured for an effective Full Stroke Test:
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NOTE:
Not all parameters are needed, but the following combinations can be used:
1.
2.
3.
Periodic Test and Maintenance Requirements
Section 8: Periodic Test and Maintenance Requirements
If the test is automatic, then the Test Coverage is PTC (proof test coverage), but can
also considered as DC (diagnostic coverage).
If the test is manual, then the Test Coverage is PTC, but cannot be considered as DC.
Parameters to be measured
Instruments to be used
Failure modes detected
Diagnostic Coverage/Proof Test Coverage
Angular position of the shaft;
Time necessary to reach to final position;
Output torque (as indirect measure, by means of the of pressure measurement in the
cylinder chamber)
Measurement of angular position as function of time
(pressure measurement is optional)
Measurement of cylinder chamber pressure as function of time
Verification of final position achievement in the established maximum time.
September 2018
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