公开(公告)号：DE102008056871A1

公开(公告)日：2010-06-10

申请号：DE102008056871

申请日：2008-11-12

Applicant: ABB TECHNOLOGY AG

Inventor： MECKE UWE ,  POHL UWE ,  SCHWIDERSKI HANS W

IPC: G01F15/18 ,  G01F1/00 ,  G01F1/58

Abstract: A flowmeter is provided to have a measuring tube, in or on which a measuring system is arranged. The flowmeter includes pinch seal sleeves which are arranged at both ends of the measuring tube for connecting the measuring tube to a process pipeline. According to an exemplary configuration, the pinch seal sleeves and/or the inner surfaces of the pinch seal sleeves are composed of an electrically insulating material and/or coated with an electrically insulating material. To make the device lighter in enable fast installation, the measuring tube can be made flangeless.

公开(公告)号：DE102008057964A1

公开(公告)日：2010-05-27

申请号：DE102008057964

申请日：2008-11-19

Applicant: ABB TECHNOLOGY AG

Inventor： HENCKEN KAI ,  SCHWIDERSKI HANS W ,  GROTHEY HARALD ,  SCHRAG DANIEL

IPC: G01F1/58

Abstract: A method is disclosed for operating a flowmeter, such as an inductive flowmeter, in which a medium flows through a measuring tube, and an arrangement of electrodes are conductively connected to the medium. To determine a filling level in a simple and reliable manner, at least four electrodes are arranged in the measuring tube essentially in a half-circumferential region based on a cross section through the measuring tube. When at least one signal is fed in at one of the electrodes or at one of the electrode pairs, an electrical current is measured at an electrode or between an electrode pair. An electrical voltage is measured between at least one other electrode pair or with respect to a common connection to ground. When comparing measurements with two different electrode combinations, different voltage and current values are related to infer a diagnosis, such as a filling level in the tube, and/or an electrode coating, and/or an oblique installation, and/or a sedimentation at a bottom of the tube. The diagnosis can be used to correct a flow rate.