Electromagnetic flowmeter principle

The working principle of electromagnetic flowmeteris based on Faraday law on electromagnetic induction. In the electromagnetic flowmeter, the measurement of the tube conductive medium is equivalent to pull the first test method of conductive metal rod, up and down on both ends of the two electromagnetic coils produce constant magnetic field. When the conductive medium through, the voltage is induced. The two electrodes pipe internally generated induced voltage measurement. Measuring insulation pipes of the lining (rubber, teflon etc) to implement and fluid and measurement of electrode electromagnetic isolation.

Electromagnetic flowmeter automatic range switching

Information content: 
Electromagnetic flowmeter automatic range switching: 

Electromagnetic flowmeter converter with optional automatic switching of the two ranges can be easily used in a large diurnal range of automatic flow control measurement system. In the "flow range setting" menu to set the range value of the first range (high range). In the "automatic range switching" menu option 1:2,1:4 or 1:8 as the second range (low range), the second range is the first range of values ​​of 1 / 2, 1 / 4 or 1 / 8. 


     Turndown ratio of 1:4 automatic range switching curve. To switch the safe and reliable, automatic setting of 5% to 10% of the hysteresis. 


     When the range changes after, FDIR terminal output of the high (+12 V) for the first range (high range), low (0V) for the second range (low range). Meanwhile, the measurement of the interface can prompt indicates the current range up to 1:1,1:2,1:4 or 1:8 ratio.