Mistake-Proofing Shutdown Devices

 

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Mistake-Proofing Shutdown Devices

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Shutdown Mistake-Proofing Devices

Shutdown Devices Mistake-proofing solutions using shutdown effects can be almost as powerful as those using forced control effects.

Mistake-proofing solutions that achieve a shutdown effect halt the process:

  • After determining that a failure is about to occur - a prevention outcome; or
  • After identifying that a failure just occurred - a detection outcome.

Most techniques that shut down a process are the result of an electronic sensor detecting a problem or a potential problem.

  • Today, there are almost as many types of sensors as there are potential problems in the process.
  • Families of sensors include limit switches, proximity switches, laser displacement sensors, visions systems, counters & timers, photoelectric sensors, and ultrasonic sensors. In addition, there are entire families of process measurement instrumentation and specialty sensors.

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