Emerson Rosemount 8800D Series Safety Manual page 25
Vortex flowmeter
safety manual for safety instrumented systems
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Also See for Rosemount 8800D Series:
- Reference manual (192 pages) ,
- Quick start manual (56 pages) ,
- Quick installation manual (31 pages)
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Figure 3-5:
C
0
B
A.
B.
C.
D.
Safety Manual
Unit subjected to a partial proof-test every year and a comprehensive
proof test every 5 years
2
4
6
PFD (Probability of failure on demand)
Mission time (years)
PFD
(average probability of failure on demand)
AVG
Predicted PFD + PPT (partial proof test) + CPT (comprehensive proof test)
8
10
Proof tests
21
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