Vega VEGACAL 60 Series Safety Manual
Two-wire 4...20 ma/hart
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- Operating instructions manual (16 pages) ,
- Operating instructions manual (16 pages)
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Summary of Contents for Vega VEGACAL 60 Series
- Page 1 Safety Manual VEGACAL series 60 Two-wire 4 … 20 mA/HART Document ID: 35593...
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Page 2: Table Of Contents
Contents Contents Functional safety ........................3 General information ......................3 Planning ........................... 4 Instrument parameter adjustment ..................6 Setup ..........................7 Reaction during operation and in case of failure ............... 7 Recurring function test ..................... 8 Safety-related characteristics ................... 8 Supplement .......................... -
Page 3: Functional Safety
1 Functional safety Functional safety General information Scope This safety manual applies for measuring systems consisting of the capacitive sensor VEGACAL series 60 in the version two-wire 4 … 20 mA/HART: VEGACAL 62, 63, 64, 65, 66, 69 Valid hardware and software versions: •... -
Page 4: Planning
1 Functional safety – Functional safety - safety instrumented systems for the process industry sector - Part 1: Framework, definitions, system, hard- ware and software requirements Safety requirements Failure limit values for a safety function, depending on the SIL class (of IEC 61508-1, 7.6.2) Safety integrity level Low demand mode... - Page 5 1 Functional safety The safe state depends on the mode: Safe state Monitoring upper level Monitoring lower level Safe state Exceeding the switch- Falling below the switch- ing point ing point Output current in safe > Switching point (-2 %) <...
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Page 6: Instrument Parameter Adjustment
1 Functional safety An associated characteristic is the value PFH (failure rate). Number values see chapter "Safety-related characteristics". Assumptions The following assumptions form the basis for the implementation of FMEDA: • Failure rates are constant, wear of the mechanical parts is not taken into account •... -
Page 7: Setup
1 Functional safety is used, the parameter "SIL" must be activated in the menu level "Service". Reaction when malfunc- The parameter adjustment of the interference current influences the tions occur safety-related characteristics. For safety-relevant applications only the following interference currents are permitted: •... -
Page 8: Recurring Function Test
1 Functional safety Fault signals that may appear are described in the appropriate operat- ing instructions manual. If faults or error messages are detected, the entire measuring system must be shut down and the process held in a safe state by other measures. - Page 9 1 Functional safety The calculations are also based on the specifications stated in chap- ter "Planning". Service life After 8 to 12 years, the failure rates of the electronic components will increase, whereby the derived PFD and PFH values will deteriorate (IEC 61508-2, 7.4.7.4, note 3).
- Page 10 1 Functional safety Proof Fig. 1: Chronological sequence of PFD (figures see above charts) after 1 year after 5 years after 10 years Multiple channel architecture Specific characteristics If the measuring system is used in a multiple channel architecture, the safety-relevant characteristics of the selected structure of the meas.
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Page 11: Supplement
2 Supplement Supplement VEGACAL series 60 • Two-wire 4 … 20 mA/HART... - Page 12 2 Supplement VEGACAL series 60 • Two-wire 4 … 20 mA/HART...
- Page 13 Notes VEGACAL series 60 • Two-wire 4 … 20 mA/HART...
- Page 14 Notes VEGACAL series 60 • Two-wire 4 … 20 mA/HART...
- Page 15 Notes VEGACAL series 60 • Two-wire 4 … 20 mA/HART...
- Page 16 Subject to change without prior notice © VEGA Grieshaber KG, Schiltach/Germany 2018 VEGA Grieshaber KG Phone +49 7836 50-0 Am Hohenstein 113...
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