Experimental Physics and
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I would echo Ron's comments. Like SLAC, the CLS and I would even assume the majority of EPICS sites there is a very clear dividing line between safety critical and non-safety critical systems. We all end up having slightly different regulations we work under but the principles are very similar.
Most of you may not have the experience what it's like to run out of water because your water isn't in a local tank. Ours at the telescope is, and if a toilet is running over night we're out of house water by morning. That means lugging water or closing the facility, and somebody scrambling to get a tanker truck up as soon as possible, which in bad weather can take days. We have a strain gauge connected to an EPICS database that provides water readings, and they're logged and a cron job emailed every weekday morning, and we have an alarm handler that notifies people when the tank goes below 30% and again when the tank goes below 20%. The pump shuts down at 3% (hardware, and hasn't failed yet for all I know). Notification is _all_ EPICS based. Certainly not as safety critical as potentially leaking HF, but David also said that the EPICS alarm is his first line of defense, and after that people take over. ?? Maren
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ANJ, 02 Sep 2010 |
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