Vega VEGAFLEX 82 Operating Instructions Manual

Also see for VEGAFLEX 82: Safety manual Supplementary instructions Quick setup guide Operating instructions Operating instructions

Contents

Vega VEGAFLEX 82 Operating Instructions Manual Manual pdf 14 page image

144 MountingVEGAFLEX 82 • 4 … 20 mA/HART - two-wire44222-EN-170220You can find detailed information on the process conditions in chapter"Technical data" as well as on the type label.4.2 Mounting instructionsMount VEGAFLEX 82 in such a way that the distance to vessel instal-lations or to the vessel wall is at least 300 mm (12 in). In non-metallicvessels, the distance to the vessel wall should be at least 500 mm(19.7 in).During operation, the probe must not touch any installations or thevessel wall. If necessary, fasten the probe end.In vessels with conical bottom it can be advantageous to mount thesensor in the center of the vessel, as measurement is then possiblenearly down to the lowest point of the bottom. Keep in mind thatmeasurement all the way down to the tip of the probe may not be pos-sible. The exact value of the min. distance (lower dead band) is statedin chapter "Technical data".Fig. 2: Vessel with conical bottomPlastic vessel/Glass vesselThe guided microwave principle requires a metallic surface on theprocess fitting. Therefore, in plastic vessels, etc., use an instru-ment version with flange (from DN 50) or place a metal sheet(ø > 200 mm/8 in) beneath the process fitting when screwing it in.Make sure that the plate has direct contact with the process fitting.When using the probes without metal vessel wall, e.g. in plasticvessels, the measured value can be influenced by strong electromag-netic fields (emitted interference according to EN 61326: class A).Use a probe in coax version for applications in liquids.Installation positionType of vessel