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Flow Meter
- Liquid
- Gas
- Level
- Pressure
- Temperature
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Water Analysis
- GDC: General Display & Controller
- STU: Turbidity & SS
- Fluorescence Dissolved Oxygen
- IN-SITU Spectra Analyzer
- SCD/SS: Conductivity/Salinity
- SOW: PAH or Oil-in-Water
- SFC: Free Chlorine Sensor
- SANH:Ammonium/Nitrate ISE Sensor
- Smart Sensor
- SUM: Ultrasonic Sludge Blanket Monitor
- SUL:Ultrasonic Level Sensor
- Velocity Sensor
Reasons why the intelligent electromagnetic flowmeter
by：Sure
2020-07-04
Why does the electromagnetic flowmeter show a negative value?
The intelligent electromagnetic flowmeter is composed of a sensor and a converter. It is based on Faraday's law of electromagnetic induction. It is used to measure the volume flow of conductive liquid with conductivity greater than 5μS/cm. It is an inductive instrument that measures the volume flow of conductive medium. The failure of the electromagnetic flowmeter in operation is generally caused by factors such as the inner wall of the sensor, lightning strikes, and environmental changes. If the electromagnetic flowmeter shows a negative flow rate during use, there are probably several reasons:
1. Reverse flow measurement. The electromagnetic flowmeter sensor is not installed according to the flow direction. At this time, the instantaneous flow rate of the flowmeter is negative.
2. The intelligent electromagnetic flowmeter has the function of forward and reverse measurement, and the signal line of the flow sensor is reversed, so the reverse flow will be displayed.
3. The measured liquid of the measuring pipe appears empty, not full, and has bubbles, etc. At this time, a negative number or a sudden flow value may appear.
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