FIELD: devices for measuring viscosity of fluid passing in pipeline, namely in explosion hazard zones.
SUBSTANCE: viscosity meter includes vibration type measuring pickup having at least one vibrating at operation measuring tube for passing fluid. In order to provide vibration of measuring tube excitement system through which exciting electric current is passed is used. In order to provide exciting electric current and in order to take measured viscosity value being instantaneous viscosity of fluid meter is provided with electronic circuit connected to double-wire circuit for controlling process which is connected with DC source. Electronic circuit supplies viscosity signal to said double-wire circuit for controlling process. In variant of invention electronic circuit modulates measured viscosity value with use of amplitude of direct current passing in said double-wire circuit. Invention provides possibility for working in electric current range less than 4 mA.
EFFECT: possibility for using standard interface.
28 cl, 11 dwg
