Heinrichs Messtechnik GmbH
Page 12 of 122
OPERATING MANUAL TMU / UMC3
3.
The TMU sensor
Application domain of the TMU sensor
The TMU sensor is intended for use solely for direct and continuous mass flow measurement of liquids and
gases, irrespective of their conductivity, density, temperature, pressure, or viscosity.
The sensor can be utilised for the direct and continuous mass flow measurement of chemical fluids,
suspensions, molasses, paint, varnish, lacquer, pastes and similar materials.
Mode of operation
Measuring principle
The Coriolis mass flowmeter is based on the
principle whereby in a rotating system a force
(known as the Coriolis force) is exerted on a
mass at a rotation point that is moving towards
or away from this point.
System configuration
The flowmeter consists of a sensor that is mounted in a pipe, and a transmitter (see Section 4.1 Application
domain of the UMC3 transmitter on page 33), that can be directly mounted on the sensor or installed
separately (e.g. on a wall).
The transmitter oscillates the flow tubes in the sensor over an excitation coil and picks up, via the sensor coil,
the measuring signal, which is proportional to the mass flow. After being temperature compensated, the
measuring signal is converted into an analog output signal that is consistent with the measuring range setting.
Acquisition
Measured variables:
Mass flow,
Density,
Temperature
Calculated variables:
Volume flow
m
F
C
2