What should be done if the E+H electromagnetic flowmeter encounters error #321?
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An E+H 50P80 electromagnetic flowmeter that uses chilled saline as the medium is showing the error message TOL.COIL.CURR #321; the current output remains at 3.5 MA. Has anyone encountered this issue before? According to the operation manual, it’s a sensor current overcurrent fault; in the event of such a fault, is it necessary to replace the gauge with a new one? Are there any other solutions? Thank you!
Those who have encountered it, come and discuss it
It’s likely that the electrode part has corroded or something similar; liquid seeped from the electrodes into the sensor, causing the coil to short-circuit and get damaged. It can be taken apart to check, and a multimeter can be used to measure whether the resistance of the coil is within the normal range. If you want to continue using it, you can weld the coil terminals together and then seal them with something like silicone, so that the liquid will no longer damage the coil, allowing the electromagnetic flowmeter to be used for a while longer. To completely solve the problem, one must check whether the selection was correct.
No.321 TOL.COIL CURR system fault (instrument fault): Excessive current in the sensor coil. Solutions: 1. For detachable types, turn off the power supply when connecting or disconnecting the coil (terminals 41/42). 2. For detachable types, turn off the power supply and check terminals 41/42. 3. Turn off the power supply and check the connections of the coil cable. 4. Replace the measurement circuit board if necessary
Just replace the board; ours has broken down before, and there’s really no other solution