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Summary of Contents for Vega VEGAFLEX 80
- Page 1 Safety Manual VEGAFLEX 80 series 4 … 20 mA/HART - two-wire With SIL qualification Document ID: 42960...
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Page 2: Table Of Contents
Repair ..........................10 Proof test General information ......................11 7.2 Test 1 - without checking the level .................. 11 7.3 Test 2 - with checking the level ..................11 Appendix A - Test report 9 Appendix B - Term definitions 10 Supplement C - SIL conformity Editing status: 2014-09-24 VEGAFLEX 80 series • 4 … 20 mA/HART - two-wire... -
Page 3: Document Language
1 Document language Document language Das vorliegende Safety Manual für Funktionale Sicherheit ist verfügbar in den Sprachen Deutsch, Englisch, Französisch und Russisch. The current Safety Manual for Functional Safety is available in German, English, French and Russian language. Le présent Safety Manual de sécurité fonctionnelle est disponible dans les langues suivantes: allemand, anglais, français et russe. Данное руководство по функциональной безопасности Safety Manual имеется на немецком, английском, французском и русском языках. VEGAFLEX 80 series • 4 … 20 mA/HART - two-wire... -
Page 4: Scope
Current output: 4 … 20 mA The following interfaces are only permitted for parameter adjustment and for informative use: • HART ® • Display and adjustment module PLICSCOM • VEGACONNECT • Current output II SIL conformity The SIL conformity was independently judged and certified by the TÜV Rheinland according to IEC 61508:2010 (Ed.2). The certificate is valid for the entire service life of all instruments that were sold before the certificate expired! Only with instrument version with supplementary electronics "Additional cur- rent output 4 … 20 mA". Verification documents see appendix VEGAFLEX 80 series • 4 … 20 mA/HART - two-wire... -
Page 5: Planning
Instructions and restric- The measuring system should be used appropriately taking pres- tions sure, temperature, density and chemical properties of the medium into account. The application-specific limits must be observed. • The specifications according to the operating instructions manual, particularly the current load on the output circuits, must be kept within the specified limits • Existing communication interfaces (e. g. HART, USB) are not used for transmission of the safety-relevant measured value • The instructions in chapter "Safety-related characteristics", para- graph "Supplementary information" must be noted • All parts of the measuring chain must correspond to the planned "Safety Integrity Level (SIL)" VEGAFLEX 80 series • 4 … 20 mA/HART - two-wire... -
Page 6: Safety-Related Characteristics
Parameter Value MTTFd 47 years 93 % Performance Level 1.58 x 10 1/h (corresponds to "d") Supplementary information Determination of the The failure rates of the instrument were determined by an FMEDA failure rates according to IEC 61508. Basis for the calculations are the component failure rates according to SN 29500. All figures refer to an average ambient temperature of 40 °C (104 °F) during the operating time. For higher temperatures, the values should be corrected: • Continuous application temperature > 50 °C (122 °F) by factor 1.3 Homogeneous redundancy possible Including errors outside the safety function. Time during which all internal diagnoses are carried out at least once. ISO 13849-1 was not part of the certification of the instrument. VEGAFLEX 80 series • 4 … 20 mA/HART - two-wire... - Page 7 • The output circuit of the transmitter is judged according to the idle current principle • "fail low" and "fail high" signals are interpreted as a failure, which triggers a fault message If this is not the case, the respective percentages of the failure rates must be assigned to the dangerous failures and the values stated in chapter Safety-related characteristics“ redetermined! Multiple channel archi- In multiple channel systems for SIL3 applications, this measuring sys- tecture tem can also be used in a homogeneously redundant configuration. The safety-related characteristics must be calculated especially for the selected structure of the measuring chain using the stated failure rates. In doing this, a suitable Common Cause Factor must be consid- ered (see IEC 61508-6, appendix D). VEGAFLEX 80 series • 4 … 20 mA/HART - two-wire...
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Page 8: Setup
Safety-relevant param- For protection against unwanted or unauthorzed adjustment, the set eters parameters must be protected against unauthorized access. For this reason, the instrument is shipped in locked condition. The PIN in delivery status is "0000". The default values of the parameters are listed in the operating in- structions. When shipped with customer-specific parameter settings, the instrument is accompanied by a list of the values differing from the default values. By means of the serial number this list can also be downloaded at www.vega.com/VEGA Tools/serial number search. Safe parameterization To avoid or detect possible errors during parameter adjustment for unsafe operating environments, a verification procedure is used that allows the safety-relevant parameters to be checked. Parameter adjustment proceeds according to the following steps: • Unlock adjustment • Change parameters • Lock adjustment and verify modified parameters The exact process is described in the operating instructions. VEGAFLEX 80 series • 4 … 20 mA/HART - two-wire... - Page 9 If necessary, you must take other measures to maintain the safety function. Warning: Instrument reset In case a reset to "Delivery status" or "Basic adjustment" is carried out, all safety-relevant parameters must be checked or set anew. VEGAFLEX 80 series • 4 … 20 mA/HART - two-wire...
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Page 10: Diagnostics And Service
"Safe status"). The diagnosis interval is specified in chapter "Safety-related charac- teristics". Error messages A fault message coded according to the type of fault is outputted. The fault messages are listed in the operating instructions. Repair Reaction when malfunc- If faults are detected, the entire measuring system must be shut down tions occur and the process held in a safe state by other measures. The manufacturer must be informed of the occurrence of a danger- ous, undetected error (incl. fault description). Electronics exchange The procedure is described in the operating instructions manual. Note the instructions for parameter adjustment and setup. Software update The procedure is described in the operating instructions manual. Note the instructions for parameter adjustment and setup. VEGAFLEX 80 series • 4 … 20 mA/HART - two-wire... -
Page 11: Proof Test
Coverage of the test Remaining dangerous, undetected failures: 11 FIT (PTC = 93 %) Test 2 - with checking the level • Conditions Instrument in installed condition • Distance from the sensor reference point to the level > 300 mm • Output signal corresponds to the level VEGAFLEX 80 series • 4 … 20 mA/HART - two-wire... - Page 12 3. Carry out the function test according to the operating instructions just like during initial operation. • Expected result To 1: – Output signal corresponds to the level – Device status in the menu Diagnosis: "OK" • To 2: – Adjustment unit signals "Test successful" • To 3: – Successful function test Coverage of the test Remaining dangerous, undetected failures: 4 FIT (PTC = 98 %) VEGAFLEX 80 series • 4 … 20 mA/HART - two-wire...
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Page 13: Appendix A - Test Report
Adjusted parameters of the safety function are documented Test result (if necessary) Test point Level Expected measured Real value Test result value Level 1 Level 2 Level 3 Level 4 Level 5 Confirmation Date: Signature: VEGAFLEX 80 series • 4 … 20 mA/HART - two-wire... -
Page 14: Appendix B - Term Definitions
+ λ λ Rate for dangerous detected failure λ Rate for dangerous undetected failure λ Rate for failure, who causes a high output current (> 21 mA) λ Rate for failure, who causes a low output current (≤ 3.6 mA) λ Rate for diagnostic failure (detected) λ Rate for diagnostic failure (undetected) Diagnostic Coverage Proof Test Coverage Proof Test Interval Useful Life Time MTBF Mean Time Between Failure MTTF Mean Time To Failure MTTR Mean Time To Restoration (Ed.2) MTTF Mean Time To dangerous Failure (ISO 13849-1) Performance Level (ISO 13849-1) VEGAFLEX 80 series • 4 … 20 mA/HART - two-wire... -
Page 15: Supplement C - Sil Conformity
10 Supplement C - SIL conformity 10 Supplement C - SIL conformity VEGAFLEX 80 series • 4 … 20 mA/HART - two-wire... - Page 16 10 Supplement C - SIL conformity VEGAFLEX 80 series • 4 … 20 mA/HART - two-wire...
- Page 17 Notes VEGAFLEX 80 series • 4 … 20 mA/HART - two-wire...
- Page 18 Notes VEGAFLEX 80 series • 4 … 20 mA/HART - two-wire...
- Page 19 Notes VEGAFLEX 80 series • 4 … 20 mA/HART - two-wire...
- Page 20 Subject to change without prior notice © VEGA Grieshaber KG, Schiltach/Germany 2014 VEGA Grieshaber KG Phone +49 7836 50-0 Am Hohenstein 113...
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