Siemens SITRANS P Instrucciones de operaciones Pagina 142
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8.2 Device-specific safety information for single-channel operation (SIL 2)
8.2.1 Safety function
Safety function for pressure transmitters
The safety function of SITRANS P refers to the measurement of pressures. An additional safety
accuracy of 2% of the measuring range (complete span) must be added to the application-
specific measuring error for an output current of 4 to 20 mA.
Total tolerance (safety function) = ± [application-specific measuring error + 2% safety
accuracy].
Pressure transmitter safety accuracy: the maximum effect of an uncritical individual error on
the measured value.
The diagnostics function will respond within 4 seconds in the worst-case scenario.
Note
Use of remote seals
If remote seals are used, the application-specific measurement error is the product of the
transmitter and remote seal measurement errors.
WARNING
Disregarding conditions for fulfilling the safety function
Disregard
can
result in a malfunction of the process plant or application, e.g. process pressure
too high, maximum level exceeded.
The binding settings and conditions are listed in the chapters "Settings (Page 140)" and
"Safety characteristics (Page 142)".
These conditions must be strictly observed in order to fulfill the safety function.
8.2.2 Settings
The following settings must be adhered to after installing and commissioning as per the
Operating Instructions:
Operation/configuration
While operating/configuring, ensure that the technical data of the pressure transmitter are
adhered to in their respective version.
Functional safety
8.2 Device-specific safety information for single-channel operation (SIL 2)
SITRANS P, DS III series with HART
140 Operating Instructions, 09/2012, A5E00047092-08
- Pressure transmitter 1
- Table of contents 10
- 1.4 Scope of the instructions 12
- 1.5 Checking the consignment 12
- 1.7 Notes on warranty 13
- Safety instructions 15
- 2.2 Use in hazardous areas 16
- 3.2 Application range 20
- 3.3 Structure 21
- 3.4 Nameplate layout 23
- SITRANS P 24
- 3.6 Functional principle 25
- Overview 26
- 3.7 Remote seal 33
- 3.8 SIMATIC PDM 33
- Installing/mounting 35
- 4.1 Basic safety instructions 36
- ① Flameproof joint 37
- 4.1.2 Proper mounting 40
- 4.2 Disassembly 41
- Installation configuration 42
- 4.3.3 Fastening 43
- Requirements 45
- 4.4.2 Installation for level 46
- Assembly on an open container 47
- 4.7 Rotating the display 57
- Connecting 59
- 5.1 Basic safety instructions 60
- Connecting the device 62
- Closing the device 63
- 5.3 Connecting the Han plug 64
- ④ Shrink sleeve 66
- ② Positioning catch 66
- Operation 67
- Basic safety instructions 68
- 6.4 Display 69
- 6.4.2 Units display 70
- 6.4.3 Error display 71
- 6.4.4 Mode display 72
- 6.4.5 Status display 72
- 6.4.6 Overflow range 73
- 6.5 Local operation 74
- Operating functions 75
- 6.5.2 Operation using buttons 76
- Setting start of scale value 81
- Adjusting full scale value 83
- Differences 85
- Blind adjusting 85
- Example of blind adjusting 85
- 6.5.6 Trimming the zero point 89
- 6.5.7 Current transmitter 90
- Releasing key lock 93
- Variable application point 94
- Fixed application point 94
- 6.5.12 Measured value display 96
- 6.5.13 Unit 97
- Condition 101
- Introduction 101
- Fundamental description 101
- See also 101
- 7.2 Process tag data 102
- 7.3.2 Measuring mode selector 103
- 7.3.3 Variable mapper 103
- Description 105
- DV Device variable 106
- MA Start of scale value 106
- ME Full scale value 106
- 7.3.9 Measured value status 112
- UNCERTAIN status 113
- HIGH LIMIT and LOW LIMIT 113
- Change in status 113
- LIMIT are swapped around 115
- 7.3.10 Analog output 116
- Procedure 119
- 7.7 Electrical damping 120
- 7.8 Fast response mode 120
- 7.9 Current sensor 120
- 7.10 Fault current 120
- Lock options 122
- 7.13 Measured value display 123
- 7.15 Bar graph 125
- 7.16 Sensor calibration 125
- Current sensor trim 126
- Factory calibration 127
- Static configuration data 128
- 7.21 Diagnostic functions 130
- &DOLEUDWLRQLQWHUYDO 131
- 6WDELOLW\PRQWK 131
- 3UHVVXUHFXUYH 132
- 8SSHUGUDJLQGLFDWRUSRLQW 132
- /RZHUGUDJLQGLFDWRUSRLQW 132
- 7.21.5 Limit modules 133
- 7.22 Simulation 135
- 7.23 Limit monitor 136
- Functional safety 139
- Operational reliability 141
- 8.2.1 Safety function 142
- 8.2.2 Settings 142
- 8.2.3 Requirements 143
- 8.2.5 Maintenance/Checking 144
- 8.2.6 Safety characteristics 144
- 8.3.1 Safety function 145
- 8.3.2 Requirements 146
- 8.3.3 Settings 147
- 8.3.5 Maintenance/Checking 148
- 8.4 Add-on parts 149
- Commissioning 151
- Requirement 155
- Service and maintenance 161
- 10.2.2 Checking the gaskets 165
- 10.3 Cleaning 166
- Cleaning the enclosure 167
- 10.4 Return procedure 168
- 10.5 Disposal 168
- Technical data 171
- 11.2 Input point 172
- 11.3 Output 179
- 11.4 Measuring accuracy 179
- 11.5 Operating conditions 185
- 11.6 Construction 189
- 11.9 HART communication 196
- Dimension drawings 197
- ① Key cover ⑤ Connection side 204
- 12.4.1 Note 3A and EHDG 205
- Flanges as per ASME 206
- Connections as per DIN 206
- Other connections 208
- BioConnect 208
- connectors 208
- 12.4.4 PMC Style 210
- 12.4.5 Special connections 211
- IDF connectors 212
- Spare parts/accessories 213
- 13.1 Order data 214
- Appendix 217
- A.3 Literature and catalogs 218
- A.5 Technical support 222
- List of abbreviations 223
- B.1 Functional safety 224
- Glossary 225
- Failure/Fault 226
- Frequency shift keying 226
- $( 234
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