Vega VEGAFLEX 81 Operating Instructions Manual

Also see for VEGAFLEX 81: Mounting instructions Operating instructions Quick setup guide Operating instructions Operating instructions

Vega VEGAFLEX 81 Operating Instructions Manual Manual pdf 14 page image

144 MountingVEGAFLEX 81 • Four-wire 4 … 20 mA/HART42280-EN-1901314 Mounting4.1 General instructionsOn devices with a threaded fitting, the hexagon on the process fittingmust be tightened with a suitable wrench.See chapter "Dimensions" for wrench size.Warning:The housing or the electrical connection may not be used for screw-ing in! Tightening can cause damage, e. g. to the rotation mechanismof the housing.Protect your instrument against moisture ingress through the followingmeasures:• Use a suitable connection cable (see chapter "Connecting topower supply")• Tighten the cable gland or plug connector• When mounting horizontally, turn the housing so that the cablegland or plug connector point downward• Lead the connection cable downward in front of the cable entry orplug connector.This applies mainly to outdoor installations, in areas where highhumidity is expected (e.g. through cleaning processes) and on cooledor heated vessels.To maintain the housing protection, make sure that the housing lid isclosed during operation and locked, if necessary.Make sure that the degree of contamination specified in chapter"Technical data" meets the existing ambient conditions.Metric threadsIn the case of instrument housings with metric thread, the cableglands are screwed in at the factory. They are sealed with plasticplugs as transport protection.You have to remove these plugs before electrical connection.NPT threadIn the case of instrument housings with self-sealing NPT threads, it isnot possible to have the cable entries screwed in at the factory. Thefree openings for the cable glands are therefore covered with red dustprotection caps as transport protection. The dust protection caps donot provide sufficient protection against moisture.Prior to setup you have to replace these protective caps with ap-proved cable glands or close the openings with suitable blind plugs.Make sure before mounting that all parts of the instrument exposed tothe process are suitable for the existing process conditions.These are mainly:• Active measuring component• Process fitting• Process sealScrewing inProtection against mois-tureCable glandsSuitability for the processconditions

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Vega VEGAFLEX 81 Operating Instructions Manual

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