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Seismic detector GM530
Installation
Application
The seismic detector GM530 provides reliable protection for safes, ar-
moured safes and strongrooms against attack with explosives and
break-in attempts with any of the known tools, such as diamond-head
drills, hydraulic pressure tools, oxygen lances.
Operation
Cutting hard materials such as concrete, steel or synthetic armouring
systems gives rise to mass acceleration. This creates mechanical oscil-
lations which are transmitted as structure-borne sound. The sensor of
the seismic detector, which is connected to the object to be monitored,
picks up these oscillations and converts them into electrical signals. The
detector electronics analyses the signals in a selected frequency range
typical for break-in tools, and triggers an alarm via a relay contact.
Adjustable detection sensitivity and selectable response time allow the
GM530 to be used for all known monitoring applications, such as
– safes,
– strongroom walls,
– strongroom doors,
– automatic cash dispensers,
– night safes.
Coverage area fig. 1 + 2
The coverage area is designated as the surface of a mechanical ob-
stacle (strongroom wall or armoured safe wall) which is monitored by a
detector. The coverage area is highly dependent on the material of the
object to be monitored. Practical experience has shown that the operat-
ing radius for steel and reinforced concrete is «r» = 3m (fig. 1).
The coverage area of the detector on strongroom walls may also ex-
tend to part of the ceiling, floor, or over corners if an homogeneous con-
nection exists. In such cases the operating radius is reduced to ¾ of
the range setting (fig. 2).
Joints between two materials always damp the structure-borne noise
transmission. One detector on the door and one on the body must al-
ways be installed. This also applies to entrance doors of strongrooms.
Surveillance of the surface fig. 3 + 4
To simplify the planning procedure on large surfaces, the circular cover-
age area can be considered as a square:
For 75% surveillance of the surface: diameter within square = 6m x 6m
2
= 36m
(fig. 3).
For standard surveillance of the surface: square in circle =
2
4.5m x 4.5m = 20m
(fig. 4).
It is of course also possible to choose intermediate values. Several de-
tectors may be installed on the same object.
Opening the detector fig. 5
The GM530 detector is provided with a double housing. This compli-
cated two-chamber encapsulation provides the detector with extremely
good shielding from electromagnetic interference and from accidental or
intentional damage.
1. Unscrew the loss-proof front screw and lift off the metal cover. The
seismic sensor is now exposed.
2. Use the two pre-assembled Philips head screws M4x8mm provided in
order to fix the detector.
Direct mounting on steel fig. 6 to 8
The detector can be installed directly on steel plates with a smooth sur-
face. Ensure that any residual paint between the steel surface and the
seismic sensor is completely removed and the mounting surface is level
to within 0.1mm. If this is not possible, use mounting plate GMXP0.
1. Remove residual paint from sensor installation site (fig. 6).
2. Stick on drilling template and centerpunch drill holes (fig. 7).
3. Drill only the two marked holes of 3.2mm dia. and tap M4 thread at
least 6mm deep. Deburr threaded holes (fig. 8).
4. Mount detector. Do not use silicon grease between sensor and object!
Indirect installation with mounting plate GMXP0 fig. 9 to 12
In the case of uneven or hardened steel plates, weld on mounting plate
GMXP0.
1. Remove residual paint from the welding area (fig. 9).
2. Weld mounting plate in four fixing points. Ensure correct positioning
(fig. 11).
ü The welding symbol must be visible on the front of the mounting
plate (fig. 10).
3. Weld along surfaces indicated. Tap off slag and remove weld spatter
from the plate surface (fig. 12).
4. Mount detector.
1454h_A4
Installation on concrete using mounting plate GMXP0 fig. 13
Never install the detector directly on a bare or plastered concrete sur-
face, since bending forces may cause damage to the seismic sensor.
Plaster of less than 10mm need not be removed.
1. Drill centre hole 10mm dia. at least 50mm deep using a sintered car-
bide bit.
2. Insert metal plug into drilled hole flush with the concrete surface (fig.
13). Use metal plugs only!
3. Ensure that the mounting plate is correctly positioned. Press the
mounting plate onto surface, knock in screw with plug and tighten well.
The plate should no longer be capable of rotation.
4. Mount detector.
Recessed mounting with wall recess set GMXW0 fig. 14 to 16
1. Drill 9mm dia. hole in wooden concrete mould.
2. Fasten the wall recess set by inserting threaded bolt and tightening
wing nut (fig. 14).
3. Push the installation conduit through the polystyrene block.
4. After removing mould, unscrew threaded bolt. Scrape out polystyrene
and cut off conduit flush (fig. 15).
5. Mount detector.
6. Mount cover plate (fig. 16).
Cable feed in wall box and floor box fig. 17
Insert cable with reserve loop into the box. Ensure appropriate cable
length when drawing the cable in.
Installation in floor box GMXB0 fig. 18 to 20
To install the floor box GMXB0, a recess with a base area of at least
300 x 300mm and a depth of 80mm is required (fig. 18). Use polystyrene
block GMXBS0 to keep this recess open when pouring in the wet con-
crete.
Two threaded bolts M6x100mm screwed into metal plugs provide the
acoustic connection between the detector and the concrete floor.
1. Level floor box using the nuts on the two threaded bolts. Fix position
finally by tightening the lock nuts (fig. 19).
2. Feed installation conduits through sealing sleeves. Fill recess with
wet cement.
3. Pull cable through and thoroughly seal the entry openings for protec-
tion against moisture (fig. 20).
4. Mount detector.
5. Fit cover plate. Cut out wood or carpet floor covering and stick to cover
plate.
Night safes fig. 21
When money is inserted in a night safe, vibrations are generated. They
can be reduced by the following measures:
Incorporate a gap between the chute and the night safe.
Fit insulation material between chute and the night safe.
Line the entry flap and the inside of the safe with sound proofing mate-
rial.
Use plastic cash boxes.
Programming fig. 22 + 23
SW = DIP switches for the following settings.
After the detector housing has been opened, use the DIP switches to se-
lect the respective settings.
Mode
SW1
Shock
SW2
Response time
SW3
SW4
Sensitivity
SW5
SW1 and SW2 Shock settings
Individual setting for normal or exposed applications on steel and proper
setting for concrete.
Shock settings
Concrete:
for normal applications
Steel:
for normal applications
Steel:
for exposed applications
not used
SW3 Response time fig. 23
Standard: Normal response time for standard applications.
Delayed: Double response time to delay any interference produced by
automatic cassette dispensing mechanisms, automatic cash dispen-
sers, and in case of objects with long break-through time.
ON
OFF
see "Shock settings"
standard
delayed
see "Settings recommended"
SW1
SW2
high
ON
ON
OFF
ON
ON
OFF
low
OFF
OFF
–
p3
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