Classification - p. 31
The use of a fog generator for security purposes is intended to rapidly
limit the visibility in a room to be protected.
The security level is determined by two main factors:
a) speed in seconds, with which the space is filled with fog.
b) the density of the fog in the area to shield off (visibility).
Although the fog ejection capacity is defined within the current standard EN
50131-8 in Annex A “Performance”, in reality within the EU and the world of
professional installers and insurers it is preferred to have a much
clearer and more result-orientated standard
(Security Fog Visibilty Protection), see
.
www.sfvp.eu
It is beyond the scope of this manual to describe the full text of the SFVP-
grading method but here are the main items:
The SFVP security level is defined in the following table:
Which "grade" suits at what maximum volume of a space is indicated by
the manufacturer or importer in the specifications of the fog generator;
eg. Grade 2 <320 m³ / Grade 3 <250 m³ / Grade 4 <170 m³.
Classification (security level)
Security
level (grade)
Time
(seconds)
Visibility
(b/w cross)
Indication of visibility
restriction
1
2
3
4
< 60 s
100 cm
65
45
40
< 30
< 20
< 10
Little restriction in sight and time.
Limited visibility with minor
time constraints.
Severely limited visibility with
time constraints
Severely limited visibility with large
time constraints (flee behavior).
<
<
<
<
Explanation:
- A Grade 2 level of security provides sufficient protection where
removal of valuable assets is likely to take longer than 30
seconds to achieve.
- Insurers and professional security managers will normally
recommend a Grade 3 or 4.
- For panic button operation a Grade 4 will always be chosen.
F
SFVP
grading
BANDIT
Controller CF31 v2
/ Manual v.102
