MSA DF-8500 C - 10 Special Conditions for the Safe Use According to SIL Applications

DF-8500 C Point type combustible gas detector with measuring range of 0~100%LEL
10 Special conditions for the safe use according to SIL
applications
The DF-8500 Gas Monitor has been subjected to rigorous reliability and functional
safety assessments, which have culminated in the gas monitor being certified to IEC
61508 by CSA. The tables below list the SIL parameters for this device.
Safety relevant parameters for the DF-8500 Gas Monitor:
56
PTI
Sensor
PFD1oo1
PFD1oo1
% SIL2
PFH1oo1
PFH1oo1
% SIL2
PFD1oo2
PFD1oo2
% SIL3
PFH1oo2
PFH1oo2
% SIL3
16
weeks
Combustible Gas
2.86E-04
2.86%
1.48E-07
14.8%
1.44271E-05
1.44%
7.49695E-09
7.5%
52
weeks
Combustible Gas
7.35E-04
7.35%
1.48E-07
14.8%
3.7441E-05
3.74%
7.61716E-09
7.62%
Sensor
λS
λD
λDD
λDU
SFF
Combustible gas
722
1255
1107
148
92.5%
Hardware safety integrity level (SIL)
SIL2
Systematic Capability (SC)
SC 3
Type
B
Safety structure
1oo1 or 1oo2
HFT
0
PFD, PFH,SFF
See table
λS, λD, λDD, λDU
See table
MTTR
72 hr.
Proof test interval (PTI)
See table
Ambient Temperature
-40℃~70℃
Hardware version
3
Software version
0.04