Douglas Krantz - Technical Writer - Describing How It Works

What does Sequence of Operation Mean?

By Douglas Krantz | Life-Safety

What does Sequence of Operation Mean?

What does Sequence of Operation Mean?

Greetings Douglas,

The fire department asked me to specify the sequence of operation, showing when the local music will be turned off with the Fire Alarm Panel. I am using a relay. I have never specified this before. I think is only when the panel is in alarm. It's a night club.

Thank you, FM

When someone is asking for a "Sequence of Operation", they are using fancy language for "What Happens?" The fire department, because they are concerned with fire safety, is asking you to say "When the fire alarm system goes into alarm, the sound system is turned off. And the sound system stays off until the fire alarm system is restored from a fire alarm condition".

In order for you to say that, though, you have to test this sequence. You have to set the fire alarm system into alarm, and confirm that the sound system actually turns off, and stays off.

Keep in mind, the music is going to be loud and there are flashing lights with the music. The fire department wants assurances, in writing, that the music is not going to prevent everyone from knowing that there is a real fire alarm.

Douglas Krantz
Life Safety
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