Wika T32.xS Bedienungsanleitung PDF herunterladen (Seite 18)

11583631.02 11/2010 GB/D/F/E

WIKA safety manual temperature transmitter T32.xS

3.5 FMEDA thermocouple with external cold junction

(safety function for 4 … 20 mA output)

664 FIT

6407 FIT

+λ

118 FIT

SFF – Safe Failure Fraction 90.7 %

MTTR 8 h

PFD for T

proof

1 year 2.91 * 10

-3

DC proof-test-coverage

incl. signal conditioning chain

99 %

3.6 FMEDA duplex sensor Pt100 (safety function for 4 … 20 mA output)

57 FIT

4017 FIT

+λ

119 FIT

SFF – Safe Failure Fraction 98.8 %

MTTR 8 h

PFD for T

proof

1 year 2.495 * 10

-4

DC proof-test-coverage

incl. signal conditioning chain

99 %

3.7 FMEDA duplex sensor thermocouple with internal cold junction

(safety function for

4 … 20 mA output

)

516 FIT

9557 FIT

+λ

117 FIT

SFF – Safe Failure Fraction 95.3 %

MTTR 8 h

PFD for T

proof

1 year 2.262 * 10

-3

DC proof-test-coverage

incl. signal conditioning chain

99 %

1) FIT = Failure in time, Unit: Quantity of failures per 10

Appendix 1: SIL Declaration of Conformity

SIL Declaration of Conformity

Functional safety per DIN EN 61508 / DIN EN 61511

Page 3/3

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