Servomex 2223A Functional Safety Manual Download Page 5

2223A Oxygen Transmitter Functional Safety Manual 

02223006A / Revision 0 

1 INTRODUCTION 

1.1 

Purpose of this manual 

This manual provides information and instructions that will be needed in order to use the 
2223A Oxygen Transmitter in a safety instrumented system. 

It is aimed at those responsible for planning, designing, installing, commissioning and 
maintaining safety instrumented systems using the 2223A Oxygen Transmitter

1.2 Product 

description 

The 2223A Oxygen Transmitter provides a stable and accurate measurement of the oxygen 
concentration in a sample gas stream. Pressure compensation and flow alarm are available 
as internally fitted options or 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. Additional status 
indications are provided by further solid state relays. 

The 2223A Oxygen Transmitter is normally used in conjunction with a 2210 or 2213 Control 
Unit. This provides additional system inputs and outputs and allows the transmitter to be 
configured and measurements to be displayed. 

  

1.3 Required 

documentation 

This manual covers only the functional safety-related aspects of the 2223A Oxygen 
Transmitter. For complete 
information it must be read in conjunction with the following:- 

Title Part 

Number 

Language 

Operator Manual 

02210001A 

English 

 02210011A 

French 

 02210021A 

German 

Installation Manual 

02223005A 

English 

 02223015A 

French 

 02223025A 

German 

 

Summary of Contents for 2223A

Page 1: ...Part Number 02223006A Revision 0 Language UK English Functional Safety Manual SERVOTOUGH OxyExact 2223A Transmitter PROCESS ANALYSERS...

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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...

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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...

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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...

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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...

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Page 17: ...2223A Oxygen Transmitter Functional Safety Manual A1 APPENDIX 02223006A Revision 0 13...

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