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