Table Of Contents - ABB TTH300 User Manual

2 TTH300, TTF300 TEMPERATURE TRANSMITTER | SM/TTX300/SIL-EN REV. E
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Table of contents

1 Application area .......................................................................................... 3
2 Purpose ........................................................................................................ 3
3 Terms and definitions ............................................................................... 4
4 Associated documents ............................................................................. 5
5 Safety function .......................................................................................... 6
Alarm behavior and alarm current output ................................................................. 6
Overall safety accuracy .................................................................................................. 6
Diagnostic test interval ................................................................................................. 6
Type classification ......................................................................................................... 6
Useful Lifetime ................................................................................................................ 7
Systematic Capability .................................................................................................... 7
Safe Failure Fraction SFF .............................................................................................. 7
Average probability of dangerous failure on demand PFD AVG ............................. 7
6 Constraints ................................................................................................. 8
7 Periodic proof test and maintenance ..................................................... 9
Proof Test ........................................................................................................................ 9
8 Installation, commissioning & configuration ....................................... 10
Activating / Deactivating write protection ............................................................. 10
Check write protection ................................................................................................ 10
Sensor redundancy with drift detection .................................................................. 10
Check sensor redundancy with drift detection ...................................................... 10
9 Identification ............................................................................................ 11
10 Example PFD AVG Calculation .................................................................. 12
11 Failure modes, failure rates and diagnostics ........................................ 12
Failure Rates .................................................................................................................. 12
Assumptions ................................................................................................................. 13
Diagnostics .................................................................................................................... 13
12 Notes on Cyber security.......................................................................... 14
13 Release history ......................................................................................... 14
14 Appendix .................................................................................................... 15
Exida FMEDA Report .................................................................................................... 15