Siemens SITRANS SL Safety Manual
In-situ laser continuous gas analyzer
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Also See for SITRANS SL:
- Operating instructions manual (212 pages) ,
- Operating instructions manual (50 pages) ,
- Compact operating instructions (24 pages)
Related Manuals for Siemens SITRANS SL
Summary of Contents for Siemens SITRANS SL
- Page 1 SITRANS SL In-situ Laser Gas Analyzer Safety Manual Supplement to Operating Instructions Continuous Gas Analysis...
- Page 3 Introduction General description of functional safety Device-specific Safety Instructions Continuous Gas Analysis List of abbreviations In-situ Laser Gas Analyzers Safety Manual Operating Instructions Supplement to SITRANS SL Operating Instructions 06/2012 A5E03433511-05...
- Page 4 Note the following: WARNING Siemens products may only be used for the applications described in the catalog and in the relevant technical documentation. If products and components from other manufacturers are used, these must be recommended or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance are required to ensure that the products operate safely and without any problems.
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Page 5: Table Of Contents
Table of contents Introduction..............................5 Purpose of this document ......................5 Device description..........................5 Device variants ..........................6 Additional documentation.......................6 History ............................7 Further information.........................7 General description of functional safety ..................... 9 Safety-instrumented system ......................9 Safety integrity level........................10 Device-specific Safety Instructions ......................13 Applications..........................13 Safety function ..........................13 Application restrictions .........................15 3.3.1... - Page 6 Table of contents Safety Manual Operating Instructions, 06/2012, A5E03433511-05...
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Page 7: Introduction
The field design of the SITRANS SL in-situ gas analyzer consists of a transmitter unit and a receiver unit. The light which is not absorbed by the sample is detected in the receiver. The concentration of the gas component is determined from the absorption. -
Page 8: Device Variants
Introduction 1.3 Device variants Device variants The following table lists all available SITRANS SL gas analyzer 4 to 20 mA variants, which meet the specific safety requirements of IEC 61508 / IEC 61511: Product number (MLFB) Measured component SIL level... -
Page 9: History
The contents of these instructions shall not become part of or modify any prior or existing agreement, commitment or legal relationship. All obligations on the part of Siemens AG are contained in the respective sales contract which also contains the complete and solely applicable warranty conditions. - Page 10 Introduction 1.6 Further information Safety Manual Operating Instructions, 06/2012, A5E03433511-05...
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Page 11: General Description Of Functional Safety
General description of functional safety Safety-instrumented system This chapter describes the functional safety in general and not specific to a device. The devices in the examples are selected as representative examples. System description The sensor (analyzer), logic unit/control system and final controlling element combine to form a safety-instrumented system, which executes a safety function. -
Page 12: Safety Integrity Level
General description of functional safety 2.2 Safety integrity level Safety integrity level Definitions SIL, Safety Integrity Level The international standard IEC 61508 defines four discrete Safety Integrity Levels (SIL) from SIL 1 to SIL 4. Each level corresponds to the probability range for the failure of a safety function. - Page 13 General description of functional safety 2.2 Safety integrity level The following table shows the achievable Safety Integrity Level (SIL) for the entire safety- instrumented system for type B subsystems depending on the proportion of safe failures (SFF) and the hardware fault tolerance (HFT). Type B subsystems include sensors with positioners, actuators with complex components, e.g.
- Page 14 General description of functional safety 2.2 Safety integrity level Safety Manual Operating Instructions, 06/2012, A5E03433511-05...
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Page 15: Device-Specific Safety Instructions
For the calculation of the measuring error of the influencing variables and external sensors contact SIEMENS support providing the operating conditions of the measurement point. Safety accuracy of the SITRANS SL: the maximum effect of a single failure on the measured value, which is classified to have no effect. - Page 16 Mean Time To Restoration (MTTR). The base of this PFD calculation is a MTTR of 72 hours. See also Certificate of Conformity SITRANS SL Functional Safety (http://support.automation.siemens.com/WW/view/en/10806991/134200) Safety Manual Operating Instructions, 06/2012, A5E03433511-05...
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Page 17: Application Restrictions
Device-specific Safety Instructions Application restrictions Installation and configuration of the SITRANS SL must be completed following the instructions detailed in the Operating Instructions of the device /1/. All application limitations and restrictions described in that manual must be observed. 3.3.1... -
Page 18: Settings
LDSComm user level "service". Checking the safety function after installation Following installation and commissioning of the SITRANS SL a safety function test has to be carried out as described in section Maintenance and checks (Page 18) . Safety Manual... -
Page 19: Behavior In Case Of Faults
The serial number can be found on the nameplate. Reference Addresses of the responsible repair center, contact partners, spare parts lists etc. can be obtained from the SITRANS SL Operating instructions, sections A.4 and A.5 as well as from the following web address: See also web (http://support.automation.siemens.com) -
Page 20: Maintenance And Checks
Bypass the safety PLC or take another appropriate action to avoid a false trip. Generate or simulate an alarm condition to force the SITRANS SL analyzer to exceed the low alarm current output limit and verify the analog current value (e.g. by disconnecting pressure / temperature input). - Page 21 Device-specific Safety Instructions Table 3- 3 Proof test part 3 (only required if external sensors are used) Step Action Bypass the safety PLC or take another appropriate action to avoid a false trip. Select analog input test for Analog Temperature using LUI (local user interface). Connect a calibrated current source, e.g.
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Page 22: Safety Characteristics
The safety characteristics necessary for use of the system are listed in the SIL declaration of conformity. These values apply under the following conditions: ● The SITRANS SL is only used in safety-related systems with a low demand mode for the safety function ●... -
Page 23: List Of Abbreviations
In case of SITRANS SL: A measuring component Diagnostic Coverage Parameter which describes the ratio of the failure rate of detected dangerous failures to the failure rate of all dangerous failures. - Page 24 O In case of SITRANS SL: A measuring component Probability of Failure on Demand Probability of dangerous failures of a safety function on demand...
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Page 25: Glossary
Glossary Dangerous failure Failure with the potential to bring the safety-instrumented system into a dangerous or non- functional status Fail-safe The capability of a control to maintain the safe state of the controlled device, e.g. machine, process, or to bring the device to a safe state even when faults/failures occur. Failure/Fault Failure: A resource is no longer capable of executing a required function. - Page 26 Glossary Safety function Defined function executed by a safety-instrumented system with the objective of achieving or maintaining a safe system status which takes into account a defined occurrence of dangerous failures. Example: Monitoring of user-defined limit values. Safety-instrumented system A safety-instrumented system excludes the safety functions that are required to achieve or maintain a safe status in a system.
- Page 28 Siemens AG Subject to changes without prior notice Industry Sector A5E03433511 Sensors and Communication 76181 KARLSRUHE GERMANY © Siemens AG 2011, 2012 www.siemens.com/processanalytics...