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Meaning of the maximum surveillance area of a smoke detector (A max)
#1
Hello,

What is the meaning of the maximum surveillance area of a smoke detector (A max) as it is defined in CEA 4040?
In Table 2 there are 2 possible values of Amax, but in Figure 7, there are many more.
Is there a difference between the definitions of Amax in Table 2 and Figure 7?

If i take for example a room of 25sqm and 3m height, flat ceiling, from Table 2 i find Amax=80sqm.
I cannot lookup this value in Figure 7....

The CEA 4040 document can be found here (in English).
https://www.apsei.org.pt/media/recursos/...EA4040.pdf

Thank you.
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#2
If you ask us about UK regulations, we might know....
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#3
(21-03-2020, 08:56 AM)gherasim Wrote: Hello,

What is the meaning of the maximum surveillance area of a smoke detector (A max) as it is defined in CEA 4040?
In Table 2 there are 2 possible values of Amax, but in Figure 7, there are many more.
Is there a difference between the definitions of Amax in Table 2 and Figure 7?

If i take for example a room of 25sqm and 3m height, flat ceiling, from Table 2 i find Amax=80sqm.
I cannot lookup this value in Figure 7....

The CEA 4040 document can be found here (in English).
https://www.apsei.org.pt/media/recursos/...EA4040.pdf

Thank you.

The lower the height of the ceiling the smaller the maximum surveillance area
Peter Robinson




07889 038650

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