Vega VEGAFLEX 82 Operating Instructions Manual

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

Vega VEGAFLEX 82 Operating Instructions Manual Manual pdf 13 page image

134 MountingVEGAFLEX 82 • 4 … 20 mA/HART - four-wire41830-EN-1710024 Mounting4.1 General instructionsOn instruments with threaded process fitting, the hexagon must betightened with a suitable wrench. For the proper wrench size seechapter "Dimensions".Warning:The housing must not be used to screw the instrument in! Applyingtightening force can damage internal parts of 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• When mounting horizontally, turn the housing so that the cablegland points downward• Loop the connection cable downward in front of the cable glandThis 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 sealProcess conditions in particular are:Screwing inProtection against mois-tureCable glandsSuitability for the processconditions