Siemens SITRANS LG240 Operating Instructions Manual

Also see for SITRANS LG240: Operating instructions Operating instructions

34 PBD-51041038SITRANS LG240 - Operating Instructions44286-EN-171021This menu item is only available if you have selected interface meas-urement under the menu item "Application".Enter the requested percentage value for the min. adjustment (inter-face).Enter the respective distance value in m for the interface correspond-ing to the percentage value of the interface.To damp process-dependent measured value fluctuations, set anintegration time of 0 … 999 s in this menu item.If you have selected interface measurement under the menu item"Application", you can adjust the damping for the level and the inter-face separately.The default setting is a damping of 0 s.A linearisation is necessary for all vessels in which the vessel volumedoes not increase linearly with the level - e.g. a horizontal cylindri-cal or spherical tank, when the indication or output of the volume isrequired. Corresponding linearisation curves are preprogrammedfor these vessels. They represent the correlation between the levelpercentage and vessel volume.The linearisation applies to the measured value indication and thecurrent output. By activating the appropriate curve, the volume per-centage of the vessel is displayed correctly. If the volume should notbe displayed in percent but e.g. in l or kg, a scaling can be also set inthe menu item "Display".Warning:If a linearisation curve is selected, the measuring signal is no longernecessarily linear to the filling height. This must be considered by theuser especially when setting the switching point on the limit signaltransmitter.In the following, you have to enter the values for your vessel, forexample the vessel height and the socket correction.Setup - Min. adjustment -InterfaceSetup - DampingSetup - Linearisation