I D
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical Engineering MagazineChementator Briefs
PDH catalyst Last month, Clariant's Catalyst business (Munich, Germany; www.clariant.com)…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILESOLIDS PROCESSINGENGINEERING PRACTICEEQUIPMENT & SERVICESFOCUS
Focus on Pumps
Self-priming, liquid-ring pumps enable hygienic operation The CFS AS/ASH Series…
NEW PRODUCTS + Show More

Comment PDF Automation & Control

Facts at your Fingertips: Alarm Management

By Chemical Engineering |

Modern control systems for chemical processes can generate frequent alarms. This one-page reference provides information on common alarm-management metrics, which can foster focused remedial actions and ultimately lead to a safer, better-performing plant. Alarm frequency As alarm frequency increases, an operator’s ability to respond correctly and in time to avoid the ultimate consequence of inaction decreases. If the rate is excessively high, some alarms will likely be missed altogether or be ignored by the operators. Alarm rates that exceed thousands per day are common in the chemical process industries (CPI), a level that is far greater than humans can handle successfully. Response to alarm rates of 10 alarms per 10 minutes can possibly be achieved for short periods of time — but only if the alarms are simple ones. And this does not mean such a rate can be sustained for many 10-minute periods in a row. An alarm flood can be defined as a 10-minute period with more than 10 new alarms, continuing through subsequent 10-minute intervals until reaching a 10-minute interval with fewer than five new alarms. The peak number of alarms within a 10-minute period is a straightforward measure of the degree of difficulty of the worst-case…
Related Content
Alarm Management By the Numbers
Deeper understanding of common alarm-system metrics can improve remedial actions and result in a safer plant Do you routinely receive…

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
Quadruple Sensor Lifetime with a Retractable Housing
Minimizing Explosion Risk Where Other Solutions Cannot
Minimizing Corrosion with Fast, Robust Gas Analysis
Lower Measurement Point Costs with Automatic pH Sensor Cleaning
Reduce the Risk of Corrosion in Fertilizer Production

View More

Live chat by BoldChat