MEASURING INSTRUMENT WITH TWO-LEAD BUS Russian patent published in 2008 - IPC G01F15/00 G01F1/84 

FIELD: inventions may be used for measuring of mass consumption, density and other characteristics of fluid medium.

SUBSTANCE: measuring instrument, adopted for using with two-lead bus, (converter of Koriolis' flowmeter) has instruments unit (drive of flowmeter tube and at least one sensor) which gets third current and forms one or more measuring signals of sensor. Signal processor gets second current and processes signals of sensor to work out informational signal. Communication system gets first current and informational signal, forms signal digital communication along two-lead bus. Source of feeding of communication switched in parallel to two-lead bus, directs first current in communication system. Source of feeding of signal processing switched in parallel to two-lead bus directs second current to signal processor. Source of current of excitation switched in parallel to two-lead bus directs third current to instrument unit. Measuring instrument is spark-proof and that allows work without electrical barrier arrangements.

EFFECT: Usage of arrangement of forming bus excludes special explosion-proof body.

19 cl, 8 dwg