WIKA T32. S Serie Guide De Sécurité page 20

Appendix: SIL declaration of conformity
GB
Functional safety per IEC 61508:2010 / IEC 61511:2004
3.7 FMEDA duplex sensor
thermocouple with internal
cold junction (safety function
for 4 ... 20 mA output)
λ [FIT]
5)
DU
λ [FIT] 5)
DD
λ +λ [FIT]
5)
SU SD
SFF Sensor/Transmitter
PFD for T
avg proof
DC diagnostic coverage
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
6) Green marked values: SFF sufficient for SIL 2
7) Green marked values: PFD
Yellow marked values: PFD
20
SIL Declaration of Conformity
T32.xS
stand
alone
11
76
76
- / 93,4 %
6)
4,70 * 10
1 year 7) -5
99,0 %
< 35 % of the maximum allowed value for SIL 2 (PFD
avg
< maximum allowed value for SIL 2 (PFD
avg
T32.xS with duplex sensor thermocouple
(internal cold junction)
Close coupled
1)
Low stress High stress
3)
21 411
266 3.676
76 76
95,0 / 93,4 % 90,0 / 93,4 %
9,08 * 10 1,80 * 10
-5 -3
- -
h
9
< 0,01)
avg
WIKA safety manual temperature transmitter T32.xS
Extension wire
2)
Low stress High stress
4) 3)
211 4.011
3.876 36.076
76 76
95,0 / 93,4 % 90,0 / 93,4 %
9,23 * 10 1,76 * 10
-4
- -
< 0,0035)
avg
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4)
-2