Electromagnetic Interference, or EMI, can cause problems in even sophisticated industrial control system when not properly protected. Instrumentation, such as a level sensor or a pressure transducer, can perform erratically, inaccurately, or not at all when exposed to EMI.
Simply put, EMI in an industrial setting is electrical noise that disrupts electrical circuits in instrumentation. These disruptions can range from simple signal degradation to a total loss of sensor functionality. EMI sources are any object that carries rapidly changing electrical currents. Typically, these would be machinery or voltage sources in close proximity to the affected instrumentation.
Following these simple few steps during installation will help keep EMI at a minimum. Note: Always follow the National Electrical Code (NEC) and all local codes.
Proper installation and grounding of instrumentation will always ensure that EMI is kept minimal and that your equipment will provide years of service for your process or application.
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