Institute of Measurement and Control Functional Safety Conference 2016
Challenges in Achieving Safety Instrumented Function Response Time for a Fast-Acting Process
Page 14
Nomenclature
AP
Application Program
FAT
Factory Acceptance Test
GWR
Guided Wave Radar
HAZOP
Hazard and Operability Study
HFT
Hardware Fault Tolerance
IEC
International Electrotechnical Commission
IPL
Independent Protection Layer
ISA
International Society of Automation
LOPA
Layer of Protection Analysis
PFD
Probability of Failure on Demand
RTD
Resistance Temperature Detector
SC
Systematic Capability
SIF
Safety Instrumented Function
SIL
Safety Integrity Level
SIS
Safety Instrumented System
SRS
Safety Requirements Specification
Acknowledgements
Special thanks to Mirek Generowicz, Robert Thorp, Keivan Sabbaghi Valashani, Niran Ramkissoon and
Justin Rahamut for their support and for providing feedback during the development of this paper.
References
Barnard, Geoffrey. and Creel, William. 2015. Impacts of Process Safety Time on Layer of Protection
Analysis, April 2015,
http://www.aesolns.com/wp-content/uploads/2015/11/impacts_of_process_safety_time_on_layer_of_protection_analysis.pdf
(accessed 21 March 2016).
IEC 61508, Functional safety of electrical/electronic/programmable electronic safety-related systems.
1998. Geneva, Switzerland: IEC.
IEC 61508, Functional safety of electrical/electronic/programmable electronic safety-related systems.
2010. Geneva, Switzerland: IEC.
IEC 61511-1, Functional safety – Safety instrumented systems for the process industry sector – Part 1:
Framework, definitions, system, hardware and software requirements
, Edition 2.0. 2016. Geneva,
Switzerland: IEC.
IEC 61511-2, Functional safety – Safety instrumented systems for the process industry sector – Part 2:
Guidelines for the application of IEC 61511-1:2016
, Edition 2.0. 2016. Geneva, Switzerland: IEC.