Planning and Installation manual VV600/VV602Plus
11
DETECTION RANGE IN METERS OF THE VV600PLUS & VV602PLUS
Material
Sensitivity
Method of attack
setting
Termic
lance
Diamond
disk
Drilling
Concrete K-35
Steel
Brick
1 / Gmax
4
8
3
14
14
8
14
14
8
Concrete K-35
Steel
Brick
2 / Gref.
3
4
1
9
9
6
9
9
6
Concrete K-35
Steel
Brick
3 / Gmin
2
2
-
6
6
4
6
6
4
Concrete K-35
Steel
Brick
4
1
1
-
5
5
3
5
5
3
Concrete K-35
Steel
Brick
5
-
-
-
4
4
2
4
4
2
-
The exact detection range can only be determined by practical tests
on site.
This table is only to be regarded as a guide line and gives the detection radius in
meters as a function of material, attack method and selected sensitivity. Please
note that cracks and joints in the material may reduce the range.
Corners in the structure will reduce the range by approx. 25%. The above
mentioned detection ranges for concrete are applicable on vaults and strong rooms
cast according to most national norms for such structures.
4.2.1. The vault or safe sensitivity test
Where the surface of the vault or safe shows cracks, gaps, or has other
irregularities, perform a test to determine if the protection range of each sensor will
be affected. Additional detectors may be needed for full coverage. For concrete,
block and brick construction, perform the following test, using an electric drill and a
6 mm carbide tipped drill bit.
For test on steel the test equipment VT610P and VT611P should be used.
1. Locate any irregularity in the construction. The mortar between bricks and
blocks should be considered as irregularities.
2. Install a detector at one side of the suspected irregularity.
3. Wire the detector to power and alarm circuit.
4. Set sensitivity to Gmax.
5. Drill into the wall at a point equal to the protection radius (R) depending on the
construction type as described in visual inspection section. Check for an alarm.
6. If an alarm does not occur, assume that the irregularity limits the protection
range of the detector. Drill again closer to the sensor until an alarm occurs and
identify where it happens.
7. Take all irregularities into account when spacing detectors. Additional detectors
may be required.
-
The separation between vault door and the frame will require an
additional detector on the door to encounter a possible attenuation at
this point.
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