Wika safety manual temperature transmitter t32.xs – WIKA T32.xS User Manual
Page 20
GB
20
11583631.03 08/2014 GB/D/F/E
WIKA safety manual temperature transmitter T32.xS
Appendix: SIL declaration of conformity
SIL Declaration of Conformity
Functional safety per IEC 61508:2010 / IEC 61511:2004
Page 4/4
3.7 FMEDA duplex sensor
thermocouple with internal
cold junction (safety function
for 4 … 20 mA output)
T32.xS
stand
alone
T32.xS with duplex sensor thermocouple
(internal cold junction)
Close coupled
1)
Extension wire
2)
Low stress
3)
High stress
4)
Low stress
3)
High stress
4)
λ
DU
[FIT]
5)
11
21
411
211
4.011
λ
DD
[FIT]
5)
76
266
3.676
3.876
36.076
λ
SU
+λ
SD
[FIT]
5)
76
76
76
76
76
SFF Sensor/Transmitter
6)
- / 93,4 % 95,0 / 93,4 % 90,0 / 93,4 % 95,0 / 93,4 % 90,0 / 93,4 %
PFD
avg
for T
proof
1 year
7)
4,70 * 10
-5
9,08 * 10
-5
1,80 * 10
-3
9,23 * 10
-4
1,76 * 10
-2
DC diagnostic coverage
99,0 %
-
-
-
-
1) Close coupled: The temperature transmitter is located in the connection head of the electrical thermometer.
2) Extension wire: The temperature transmitter is located outside of the connection head of the electrical thermometer, for
example in a cabinet distant from the measuring point
3) Low stress applies to a low vibration environment or the use of a cushioned sensor. Operation below 67 % maximum rating
according to specification
4) High stress applies to a high vibration environment. Operation above 67 % maximum rating according to specification
5) FIT = Failure in time, Unit: Quantity of failures per 10
9
h
6) Green marked values: SFF sufficient for SIL 2
7) Green marked values: PFD
avg
< 35 % of the maximum allowed value for SIL 2 (PFD
avg
< 0,0035)
Yellow marked values: PFD
avg
< maximum allowed value for SIL 2 (PFD
avg
< 0,01)