2223A Oxygen Transmitter Functional Safety Manual
02223006A / Revision 0 i
LIST OF CONTENTS
Section
1INTRODUCTION ................................................................................................1
1.1 Purpose of this manual.......................................................................................1
1.2 Product description............................................................................................. 1
1.3 Required documentation.....................................................................................1
2DEFINITIONS 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 PFDAVG................................................................................................................4
2.10 Mean time to repair (MTTR) ...............................................................................4
2.11 Proof test.............................................................................................................4
2.12 Safety integrity level (SIL)................................................................................... 5
3SAFETY 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
