2223A Oxygen Transmitter Functional Safety Manual
ii
02223006A / Revision 0
This page intentionally blank.
Page 1: ...Part Number 02223006A Revision 0 Language UK English Functional Safety Manual SERVOTOUGH OxyExact 2223A Transmitter PROCESS ANALYSERS...
Page 2: ...This page intentionally blank...
Page 3: ...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 3 SAFETY INSTRUCTION...
Page 4: ...2223A Oxygen Transmitter Functional Safety Manual ii 02223006A Revision 0 This page intentionally blank...
Page 5: ...r as inputs from external measurements The measurement is provided as a mA output Fault indications are provided by a solid state relay output and by an out of range current from the mA output Additio...
Page 6: ...2223A Oxygen Transmitter Functional Safety Manual 2 02223006A Revision 0 This page intentionally blank...
Page 7: ...diagnostic tests proof tests operator intervention or through normal operation 2 6 Type A and type B subsystems This relates to the complexity of the subsystem and the degree to which it is understood...
Page 8: ...AVG The probability of a dangerous failure on demand This is intended to apply to systems operating in a low demand mode where the safety function is required on average a maximum of once per year A t...
Page 9: ...ardware failures and so covers the following characteristics Product type A or B Hardware fault tolerance Safe failure fraction Average probability of a dangerous failure of the safety function on dem...
Page 10: ...2223A Oxygen Transmitter Functional Safety Manual 6 02223006A Revision 0 This page intentionally blank...
Page 11: ...on The safety function of the 2223A Oxygen Transmitter is the measurement of oxygen concentration in a sample stream The dangerous failure is the failure to indicate this oxygen concentration to the p...
Page 12: ...elect Transmitter Peripherals Enter the appropriate forms and ensure that the necessary settings are made as described below Note that it may be necessary to scroll the forms displayed on the control...
Page 13: ...s should then be set as appropriate As an alternative to the internal flow sensor external devices may be used in conjunction with the external flow alarm inputs as described in the installation manua...
Page 14: ...application the design of the overall safety instrumented system and the target SIL The recommended proof test interval is a maximum of one year If there are any transmitter fault conditions present...
Page 15: ...layed is within an acceptable tolerance of the actual pressure 4 Calibrate the pressure sensor 5 Carry out a full low and high calibration of the oxygen measurement 6 Carry out pressure compensation c...
Page 16: ...2223A Oxygen Transmitter Functional Safety Manual 12 02223006A Revision 0 This page intentionally blank...
Page 17: ...2223A Oxygen Transmitter Functional Safety Manual A1 APPENDIX 02223006A Revision 0 13...
