Views:3 Author:Site Editor Publish Time: 2021-08-26 Origin:Site
Electromagnetic flow meter are a specific system comprised by transmitter and converter,cable length,insulation issue ,number of shielding layers, distributed capacitance and conductor cross-sectional area all affect the measurement result of mag flow meter. Severely ,the sewage flow meter will not work normally.
Electrodes and lining are materials which are in touch with medium direct .If we choose unsuitable electrodes and lining materials, it will cause many problems,such as electrode fouling and corrosion,lining wearing ,fouling and deformation.These all problems will lead to inaccurate measurement of industrial flow meters,and shorten the service life of mag flow meters.
A.DC wave excitation
DC excitation is easy to produce electrode polarization and DC interference problems.Excessive polarization voltage will cause blockage of the input end of the converter,the converter of mag meter can't amplify normal signals .Thus ,we can’t receive the readings in the display of mag flow meter.
B.AC sine wave excitation
AC sine wave excitation is prone to cause zero vibration of electromagnetic sensor.Obviously ,improper zero position will lead to inaccurate measurement .