Nitto Flowtech MF710, Инструменты операции

Страница: 4 / 41

1. Operation Principle
<>The operation of a magnetic flowmeter or mag meter is based upon Faraday's Law, which states
that the voltage induced across any conductor as it moves at right angles through a magnetic field is
proportional to the velocity of that conductor.
Faraday's Formula:
E is proportional to V x B x D where:
E = The voltage generated in a conductor
V = The velocity of the conductor
B = The magnetic field strength
D = The length of the conductor
To apply this principle to flow measurement with a magnetic flowmeter, it is necessary first to state
that the fluid being measured must be electrically conductive for the Faraday principle to apply. As
applied to the design of magnetic flowmeters, Faraday's Law indicates that signal voltage (E) is
dependent on the average liquid velocity (V) the magnetic field strength (B) and the length of the
conductor (D) (which in this instance is the distance between the electrodes).In the case of
wafer-style magnetic flowmeters, a magnetic field is established throughout the entire cross-section
of the flow tube (Figure 1). If this magnetic field is considered as the measuring element of the
magnetic flowmeter, it can be seen that the measuring element is exposed to the hydraulic
conditions throughout the entire cross-section of the flowmeter. With insertion-style flowmeters, the
magnetic field radiates outward from the inserted probe (Figure 2).
2. Main Features and Applications
Electromagnetic flowmeter consists of two parts of the sensor and transmitter. KF700-type
electromagnetic flowmeter for measuring a variety of acid, alkali, salt solution, paper pulp, slurry and
other conductive liquid or liquid-solid two-phase medium volume flow. In the chemical, alloy, water
supply and drainage, sewage treatment, food, sugar, paper making, environmental protection and
other departments to be widely application.
functional diagram
01
SENSORS PARTS
TM
Http: // www.flowmeter.cc
SENSORS