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Can you see Abnormal without an Alarm?

When designing a high performance HMI, the goal is to enable the controller to see an abnormal operating condition prior to reaching an alarm limit. Sounds easy right? Well maybe not. Historically, HMIs have been mostly line drawings and numbers…

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What is an “Alarm”?

The word Alarm is used in the pipeline business to mean may things. Historically, anything that was annunciated by light, animation, sound or other means has been considered an alarm.  Under the PHMSA Control Room Management rule, pipeline operators are…

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