Vega VEGABAR 82 Operating Instructions Manual

Also see for VEGABAR 81: Operating instructions Operating instructions Quick setup guide Operating instructions Quick setup guide

Contents

6410 SupplementVEGABAR 82 • Slave sensor for electronic differential pressure48046-EN-190320Electrical protective measures1)Housing material Version Protection acc. toIEC 60529Protection acc. toNEMAPlasticSingle chamberIP 66/IP 67 Type 4xAluminium IP 66/IP 67IP 66/IP 68 (0.2 bar)Type 4xType 6PStainless steel (electro-polished) IP 66/IP 67IP 69KType 4x-Stainless steel (precision cast-ing)IP 66/IP 67IP 66/IP 68 (0.2 bar)Type 4xType 6PStainless steel Transmitter for external housing IP 68 (25 bar) -Altitude above sea levelƲ by default up to 2000 m (6562 ft)Ʋ with connected overvoltage protectionon the master sensorup to 5000 m (16404 ft)Pollution degree1) 4Protection rating (IEC 61010-1) IIApprovalsInstruments with approvals can have different technical specifications depending on the version.For that reason the associated approval documents of these instruments have to be carefullynoted. They are part of the delivery or can be downloaded under www.vega.com, "Instrumentsearch (serial number)" as well as in the download area.10.2 Calculation of the total deviationThe total deviation of a pressure transmitter indicates the maximum measurement error to be ex-pected in practice. It is also called maximum practical deviation or operational error.According to DIN 16086, the total deviation Ftotal is the sum of the basic deviation Fperf and the long-term stability Fstab:Ftotal= Fperf + FstabThe basic deviation Fperf consists of the thermal change of the zero signal and the output span FT aswell as the deviation FKl:Fperf = √((FT)2 + (FKl)2)The thermal change of zero signal and output span FT is specified in chapter "Technical data". Thebasic temperature error FT is shown in a graphic. Depending on the measuring cell version and Turndown, this value must be multiplied with the additional factors FMZ and FTD:FT x FMZ x FTDAlso these values are specified in chapter "Technical data".This applies for a digital signal output through HART, Profibus PA or Foundation Fieldbus.With a 4 … 20 mA output, the thermal change of the current output Fa must be added:Fperf = √((FT)2 + (FKl)2 + (Fa)2)To provide a better overview, the formula symbols are listed together below:• Ftotal: Total deviation