ISA TR84.00.02-2002 - Part 5
- Safety Instrumented Functions (SIF) - Safety Integrity Level (SIL) Evaluation Techniques Part 5: Determining the PFD of SIS Logi
- standard by The International Society of Automation, 06/17/2002
- Category: ISA
$179.00
$90.00
Scope1.1 ISA-TR84.00.02-2002 - Part 5 is informative and does not contain any mandatory requirements.ISA-TR84.00.02-2002 - Part 5 is intended to be used only with a thorough understanding of ISATR84.00.02-2002 - Part 1 which defines the overall scope.
1.2 ISA-TR84.00.02-2002 - Part 5 provides:
a) guidance in PFD analysis of logic solvers;
NOTE The term "logic solver" will be used throughout Part 5 to indicate the SIS logic solver. The logic solver technology may be any E/E/PES.
b) a method to determine the PFD of logic solvers;
c) failure rates and failure modes of logic solvers;
d) the impact of diagnostics, diagnostic coverage, covert faults, test intervals, common cause,systematic failures, redundancy of logic solvers on the PFD of the logic solver; and
e) a method for the verification of PFD of logic solvers.
1.3 The procedures and examples outlined in ISA-TR84.00.02-2002 - Part 5 provide the engineer withMarkov modeling steps to be followed in determining a mathematical value for the PFD for typicalconfigurations of SIS logic solvers designed according to ANSI/ISA-84.01-1996.
1.4 Persons using ISA-TR84.00.02-2002 - Part 5 require a basic knowledge of Markov Analysis.
1.5 See ISA-TR84.00.02-2002 - Part 1 (Introduction), Part 2 (Simplified Equations), Part 3 (Fault TreeAnalysis), and Part 4 (Markov Analysis) if it is necessary to mathematically evaluate the SIL of the safetyinstrumented function (SIF).
1.2 ISA-TR84.00.02-2002 - Part 5 provides:
a) guidance in PFD analysis of logic solvers;
NOTE The term "logic solver" will be used throughout Part 5 to indicate the SIS logic solver. The logic solver technology may be any E/E/PES.
b) a method to determine the PFD of logic solvers;
c) failure rates and failure modes of logic solvers;
d) the impact of diagnostics, diagnostic coverage, covert faults, test intervals, common cause,systematic failures, redundancy of logic solvers on the PFD of the logic solver; and
e) a method for the verification of PFD of logic solvers.
1.3 The procedures and examples outlined in ISA-TR84.00.02-2002 - Part 5 provide the engineer withMarkov modeling steps to be followed in determining a mathematical value for the PFD for typicalconfigurations of SIS logic solvers designed according to ANSI/ISA-84.01-1996.
1.4 Persons using ISA-TR84.00.02-2002 - Part 5 require a basic knowledge of Markov Analysis.
1.5 See ISA-TR84.00.02-2002 - Part 1 (Introduction), Part 2 (Simplified Equations), Part 3 (Fault TreeAnalysis), and Part 4 (Markov Analysis) if it is necessary to mathematically evaluate the SIL of the safetyinstrumented function (SIF).
PDF
All of our standards document are available in PDF (Portable Document Format), an electronic, downloadable format.You will be able to download the file in your account downloads.
Multi-User Access
After purchasing, you have the ability to assign each license to a specific user.
Printable
At any time, you are permitted to make printed copies for your and your members' reference use.
