Vega VEGABAR 82 Operating Instructions Manual

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62 For your safetyVEGABAR 82 • Slave sensor for electronic differential pressure48046-EN-1903202.5 EU conformityThe device fulfils the legal requirements of the applicable EU direc-tives. By affixing the CE marking, we confirm the conformity of theinstrument with these directives.You can find the EU conformity declaration on our website underwww.vega.com/downloads.2.6 SIL qualification according to IEC 61508The Safety Integrity Level (SIL) of an electronic system is used to as-sess the reliability of integrated safety functions.For detailed specification of the safety requirements, multiple SILlevels are specified according to safety standard IEC 61508. You canfind detailed information in chapter "Functional safety (SIL)" of theoperating instructions.The instrument meets the specifications of IEC 61508: 2010 (Edi-tion 2). It is qualified for single-channel operation up to SIL2. Theinstrument can be used homogeneously redundant up to SIL3 inmulti-channel architecture with HFT 1.2.7 Permissible process conditionsFor safety reasons, the instrument must only be operated within thepermissible process conditions. You can find detailed information onthe process conditions in chapter "Technical data" as well as on thetype label.The permissible process pressure range is specified by "MWP"(Maximum Working Pressure) on the type label, see chapter "Struc-ture". The MWP takes the element of the measuring cell and process-ing fitting combination with the weakest pressure into considerationand may applied permanently. The specification refers to a referencetemperature of +20 °C (+68 °F). It also applies when a measuring cellwith a higher measuring range than the permissible pressure range ofthe process fitting is installed order-related.In order to prevent damage to the device, the test pressure may onlyexceed the specified MWP briefly by 1.5 times at reference tempera-ture. The pressure stage of the process fitting as well as the overloadresistance of the measuring cell are taken into consideration here(see chapter "Technical Data").In addition, a temperature derating of the process fitting, e. g. withflanges, can limit the permissible process pressure range accordingto the respective standard.2.8 Installation and operation in the USA andCanadaThis information is only valid for USA and Canada. Hence the follow-ing text is only available in the English language.Installations in the US shall comply with the relevant requirements ofthe National Electrical Code (ANSI/NFPA 70).