The accuracy of the sewage electromagnetic flowmeter is fully verified to determine the accuracy of the electromagnetic flowmeter in the application process of the waterworks and to ensure that the measurement data is authentic and reliable or whether the electromagnetic flowmeter is replaced. Visual inspection and instrumentation methods are used to check whether the excitation coil resistance of the sensor, the insulation resistance between the signal lines, and the grounding resistance are in compliance with the pre-factory standards. Does the zero point of the electromagnetic flowmeter converter and the output current meet the accuracy requirements? .
The influence of the external environment of the sewage electromagnetic flowmeter, such as the laying of the same line of the excitation line and the signal line, the excitation line and the signal line and the high voltage cable, and the influence of factors such as large transformers or motors around on the accuracy of the electromagnetic flowmeter are evaluated. This evaluation mainly uses the visual inspection method to observe whether the electromagnetic flowmeter in operation is in a state of abrupt change or fluctuation. It is roughly judged whether the electromagnetic flowmeter is disturbed by electromagnetic waves or other stray waves or whether there are bubbles in the pipeline.
Sewage electromagnetic flowmeter
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