Electromagnetic flowmeter loss of excitation alarm
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The national standard electromagnetic flowmeter triggers an excitation loss alarm; after restarting the device the alarm disappears and the flow rate increases by 50%. What is the cause and how can it be resolved?
It’s best to ask the manufacturer. There are no national standards in the field of instruments; ask them about the voltage or current required for excitation, as well as the resistance of the excitation coil. It’s likely that there is a problem with the excitation circuit. If the excitation power supply is faulty, the circuit board needs to be replaced; if it’s the coil that’s problematic, then you’ll need to consult the manufacturer. Generally, it’s not possible to fix this issue on one’s own – the device needs to be sent back to the factory