ISA TR84.00.02 PART 1

W/D S/D BY ISA TR84.00.02

ISA-TR84.00.02-2002 – Part 1 is informative and does not contain anymandatory clauses.ISA-TR84.00.02-2002 is intended to be used only with a thoroughunderstanding ofANSI/ISA-84.01-1996 (see Figure I.1). Prior to proceeding with use ofISA-TR84.00.02-2002 in asafety application, the Hazards and Risk Analysis must have beencompleted and the followinginformation provided

a) It is determined that a SIS is required.

b) Each safety instrumented function to be carried out by the SIS(s)is defined.

c) The SIL for each safety instrumented function is defined.

ISA-TR84.00.02-2002 – Part 1 provides

a) guidance in Safety Integrity Level analysis;

b) methods to implement Safety Instrumented Functions (SIF) to achievea specified SIL;

c) discussion of failure rates and failure modes (Annex D) of SIS andtheir components;

d) discussion of diagnostic coverage, covert faults, common cause,systematic failures, redundancyof SIF;

e) tool(s) for verification of SIL; and

f) discussion of the effect of functional test interval.

The objective of ISA-TR84.00.02-2002 – Part 1 is to introduce thereader to the performance basedapproach for evaluating the reliability of SIF and to present systemreliability methodologies thatcan be used to evaluate the system performance parameters, namely, theprobability that the SIFfails to respond to a demand and the probability that the SIF createsa nuisance trip.ISA-TR84.00.02-2002 – Part 1 serves as an introduction for all otherparts.

Edition:

02

Published:

06/17/2002

Number of Pages:

108

File Size:

1 file , 630 KB