WIKA T32. S Serie Manual De Seguridad página 19

Appendix: SIL declaration of conformity
3.4 FMEDA 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 1 year
avg proof
DC diagnostic coverage
3.5 FMEDA thermocouple
with external 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 1 year
avg proof
DC diagnostic coverage
3.6 FMEDA duplex sensor
Pt100 (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 1 year
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
8) Assumption: low stress, close coupled for external Pt100 sensor
WIKA safety manual temperature transmitter T32.xS
SIL Declaration of Conformity
Functional safety per IEC 61508:2010
T32.xS T32.xS with thermocouple (internal cold junction)
stand
Close coupled
alone
Low stress
10 15
73 168
76 76
- / 93,7 % 95,0 / 93,7 %
6)
4,38 * 10 6,57 * 10
7) -5
99,0 % -
T32.xS T32.xS with thermocouple (external cold junction
stand
Close coupled
alone
Low stress
11 24
76 210
76 76
- / 93,4 % 90,8 / 93,4 %
6)
4,70 * 10 1,07 * 10
7) -5
99,0 % -
T32.xS T32.xS with duplex sensor Pt100
stand
Close coupled
alone
Low stress
10 27
75 154
76 76
- / 93,8 % 82,0 / 93,8 %
6)
4,36 * 10 1,19 * 10
7) -5
99,0 % -
9
< 35 % of the maximum allowed value for SIL 2 (PFD
avg
< maximum allowed value for SIL 2 (PFD
avg
1)
3) High stress 4)
210
1.873
76
90,0 / 93,7 %
9,20 * 10
-5 -4
-
1)
High stress
3) 4)
228
1.954
76
89,6 / 93,4 %
9,99 * 10
-4 -4
-
1)
High stress
3) 4)
390
1.599
76
80,0 / 93,8 %
1,71 * 10
-4 -3
-
h
< 0,01)
avg
Extension wire
2)
Low stress 3) High stress
110 2.010
1.973 18.073
76 76
95,0 / 93,7 % 90,0 / 93,7 %
4,82 * 10 8,80 * 10
-4
- -
Extension wire
2)
Low stress High stress
3)
119 2.019
2.015 18.115
76 76
94,7 / 93,4 % 90,0 / 93,4 %
5,23 * 10 8,84 * 10
-4
- -
Extension wire
2)
Low stress High stress
3)
356 3.810
1.649 15.275
76 76
82,0 / 93,8 % 80,0 / 93,8 %
1,56 * 10 1,67 * 10
-3
- -
< 0,0035)
avg
Page 3/4
EN
4)
-3
)
8)
4)
-3
4)
-2
19