1. The flow indication value does not match the actual value. Check whether the fluid in the sensor is filled with tubes, with or without air bubbles, and install a getter in the upstream if any air bubbles are present; check the grounding conditions; check whether the valve upstream of the flowmeter, if any, moves downstream or fully open ; Check the converter range setting is correct, if not, re-set the correct range.
2. The indication fluctuates in a certain interval. Check the environmental conditions are changed, such as the emergence of new sources of interference and other factors affecting the normal operation of the instrument source or vibration, etc., should promptly remove the interference or flow meter shift; Check the test signal cable, with insulating tape end processing, A wire, an inner shield, an outer shield, and the shells are not in contact with each other.
3.Electromagnetic flowmeter used to measure the flow of fluid must be conductive, so non-conductive gases, steam, oil, copper and other substances can not use electromagnetic flowmeter to measure flow.
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chemical flow meters liquid :https://www.youtube.com/watch?v=qa5QgeKSDok
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