Servomex 2223A, Руководство по функциональной безопасности

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2223A Oxygen Transmitter Functional Safety Manual
02223006A / Revision 0 i
LIST OF CONTENTS
Section
1 INTRODUCTION ................................................................................................ 1
1.1 Purpose of this manual ....................................................................................... 1
1.2 Product description ............................................................................................. 1
1.3 Required documentation..................................................................................... 1
2 DEFINITIONS AND DESCRIPTIONS ................................................................ 3
2.1 Safety instrumented system (SIS) ...................................................................... 3
2.2 Safety function .................................................................................................... 3
2.3 Safe failure.......................................................................................................... 3
2.4 Dangerous failure................................................................................................ 3
2.5 Detected failure................................................................................................... 3
2.6 Type A and type B subsystems .......................................................................... 3
2.7 Hardware fault tolerance (HFT) .......................................................................... 4
2.8 Safe failure fraction (SFF)................................................................................... 4
2.9 PFD
AVG
................................................................................................................ 4
2.10 Mean time to repair (MTTR) ............................................................................... 4
2.11 Proof test............................................................................................................. 4
2.12 Safety integrity level (SIL) ................................................................................... 5
3 SAFETY INSTRUCTIONS .................................................................................. 7
3.1 Boundary of safety system ................................................................................. 7
3.2 Safety function .................................................................................................... 7
3.3 Installation........................................................................................................... 7
3.4 Settings ............................................................................................................... 8
3.4.1 mA Output........................................................................................................... 8
3.4.2 Fault relay ........................................................................................................... 9
3.4.3 Flow alarm .......................................................................................................... 9
3.4.4 Analog inputs ...................................................................................................... 9
3.5 Protection of settings ........................................................................................ 10
3.6 Checking safety ................................................................................................ 10
3.6.1 Checks where pressure compensation is not used. ......................................... 10
3.6.2 Checks where pressure compensation is used. ............................................... 11
3.6.3 Routine calibration ............................................................................................ 11
A1 APPENDIX........................................................................................................ 13