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ISA-RP77-60-02-2000(R2005)
Fossil Fuel Power Plant Human-Machine Interface: Alarms

ISBN: 978155617-7372
Published: 2005
Length: 28 pages

Price: $45.00

This recommended practice is provided for the benefit of design engineers and, ultimately, plant operators. Use of this recommended practice will result in a more coherent and useful application of plant alarms for operations personnel. The goal of this recommended practice is to reduce alarm discrepancies, clutter, excessive noise levels, and information overload, but is not intended for post-factum analysis of events.

This recommended practice will address the following alarm-related issues:

• Functional grouping;
• Prioritization;
• Order and consistency;
• Colors;
• Formats and displays;
• Audio tone and pitch;
• Acknowledge, reset, and test functions;
• Nuisance alarms.

These items are addressed both individually and with respect to their relationships with one another. This recommended practice pertains to alarms displayed using lights or light-boxes, but not software based alarms (e.g., CRT-based alarms) and is intended to supplement the information provided by ANSI/ISA-18.1-79 (R04), Annunciator Sequences and Specifications.