Spectrex Quasar 900 Open-Path Gas Detection System - Manual (Page 69)

Safety Relevant Parameters for the Quasar 900 Open Path Gas Detector 57
C SIL-2 Features
➣ In this appendix…
Safety Relevant Parameters for the Quasar
900 Open Path Gas Detector page 57
General Conditions for Safe Use page 58
This appendix details the special conditions to comply with the requirements
of EN 61508 for SIL-2.
The SafEye Quasar 900 IR Open-Path Gas Detector can be used in low and
high demand mode applications, see IEC 61508-4:2010, Chapter 3.5.16.
C.1 Safety Relevant Parameters for the Quasar
900 Open Path Gas Detector
Type: B
Structure: 1oo1
HFT: 0
Main time to repair: 72 h
Ambient temperature: max. 65°C
Proof-Test-Interval: 52 weeks
DC = 94%
PFD
avg
= 6.45x 10 -4 PFD
%_SIL2
= 6,4 %
PFH = 1.15 x 10 -7 1/h PFH
%_SIL2
= 11,5 %

S
2056.1fit
 

D
1976.1fit
 

DU
114.8fit
 

SD
1933.4fit
 

DD
1861.4fit
 
SFF 97 %
 