User Guide

Seismic detector GM525
Installation
Application
Theseismic detectorGM525provides reliableprotection against attack
with explosives and any known tools to open solid metal cases.
Operation
Cutting steel gives rise to mass acceleration. This creates mechanical
oscillationswhich aretransmittedas structure-borne sound.Thesensor
oftheseismicdetector, whichisconnectedtotheobjecttobemonitored,
picksupthese oscillations andconvertstheminto electricalsignals.The
detector electronics analyses the signals in a selected frequency range
typical for break-in tools, and triggers an alarm via a relay contact.
Adjustabledetectionsensitivity and selectable responsetime allow the
GM525 to be used for all known monitoring applications, such as
-- ticket machines,
--consumer automates,
-- phone automates,
-- small hotel room safes (£0.065m
3
) with single layer steel case (forall
other larger safes use GM530 or GM560).
Coverage area fig. 1 + 2
The coverage area is designated as the surface of a mechanical ob-
stacle which is monitored by a detector. The coverage areaishighly de-
pendent on the material of the object to be monitored. Practical experi-
ence has shown that the operating radius for steel is «r» = 1.5m (fig. 1).
Note: Joints between two materials always damp the structure-borne
noise transmission, therfore not recommended on standard multilayer
safes.
Opening the detector fig. 3
The GM525 detector is provided with a double housing. This compli-
cated two-chamber encapsulation provides the detector with extremely
good shieldingfrom electromagneticinterferenceandfromaccidentalor
intentional damage.
1. Unscrew the loss-proof front screw and lift off the metal cover. The
seismic sensor is now exposed.
2.Usethetwopre-assembledM4x8mmPhilipsheadscrewsprovidedin
order to fix the detector.
Direct mounting on steel fig. 4 to 6
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
seismicsensoris completelyremoved and themountingsurfaceisplan.
If this is not possible, use mounting plate GMXP.
1. Remove residual paint from sensor installation site (fig. 4).
2. Stick on drilling template and centerpunch drill holes (fig. 5).
3. Drill only the two marked holes of 3.2mm dia. and tap M4 thread at
least 6mm deep. Deburr threaded holes (fig. 6).
4.Mountdetector.Donotusesilicongreasebetweensensorandobject!
Indirect installation with mounting plate GMXP fig.7to10
In the caseof uneven or hardenedsteelplates,weld on mountingplate
GMXP.
1. Remove residual paint from the welding area (fig. 7).
2.Weld mounting plate in four fixing points. Ensure correct positioning
(fig. 9).
➼ The welding symbol must be visible on the front of the mounting
plate (fig. 8).
3. Weld along surfaces indicated. Tap off slag and remove weld spatter
from the plate surface (fig. 10).
4.Mount detector.
Programming fig. 11 + 12
SW = DIP switches for the following settings.
Afterthedetectorhousinghasbeenopened,usetheDIPswitchestose-
lect the respective settings.
Mode
ON OFF
SW1
S
h
o
c
k
s
e
e
”
S
h
o
c
k
s
e
t
t
i
n
g
s
”
SW2
S
h
o
c
k
s
e
e
”
S
h
o
c
k
s
e
t
t
i
n
g
s
”
SW3
Response time standard delayed
SW4
S
e
n
s
i
t
i
v
i
t
y
s
e
e
”
S
e
t
t
i
n
g
s
r
e
c
o
m
m
e
n
d
e
d
”
SW5
S
e
n
s
i
t
i
v
i
t
y
s
e
e
”
S
e
t
t
i
n
g
s
r
e
c
o
m
m
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d
e
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”
SW1 and SW2 Shock settings
Individual setting for normal or exposed applications.
Shock settings for SW1 SW2
normal applications
high ON ON
light, exposed applications
h
i
g
h
OFF ON
exposed applications ON OFF
heavy, exposed applications
low
OFF OFF
SW3 Response time fig. 11
Standard: Normal response time for standardapplications.
Delayed: Double responsetime todelay any interference produced by
automatic cash dispensing mechanisms or heavy functional noise.
SW4 and SW5 Sensitivity setting fig. 11
Select the sensitivity setting to suit the application, the material and the
object with the associated interference.
Important:The detection radius will decrease as sensitivity is reduced.
Important:Duringcommissioning, be sure to check for function-related
noise(see”Commissioning”) .
Settings recommended for SW3, SW4 and SW5
O
b
j
e
c
t
s
w
i
t
h
Response
time
Sensitivity
O
b
j
e
c
t
s
w
i
t
h
SW3 SW4 SW5
minimum interference
ON
high
A
ON ON
light interference
ON
h
i
g
h
B OFF ON
function-related noise
OFF C ON OFF
heavy function-related noise
OFF
low
D OFF OFF
Remote controlled sensitivity reduction fig. 13
Anadditionalfeatureofthisdetectorisasensitivityreductioninputatter-
minal3(Remote)whichcanbeactivatedfromdistanceifrequired.Using
a LOW signal, the detector is reduced to about1/5 of the sensitivity set-
tingfor aslong as there is heavy functional noise (coins!) bymeans ofa
contact during cash dispensing.
GMXC2 Conduit connection sleeve fig. 14
The functionofthe GMXC2 conduitconnection sleeve isto ensure fixed
andsecure connection of surface-mounted conduits of an outside dia-
meter of up to 16mm. Smaller-size surface-mounted conduits may re-
quirefittingofanappropriatetransitionsleeveofamaximumoutsidedia-
meter of 16mm.
To fit the GMXC2 conduit connection sleeve, proceed as follows:
1. Route thesurface-mounted conduitto within about5mm ofthe detec-
tor housing and fit the conduit connection sleeve onto the surface-
mounted conduit.
2. Wire theconnectingcableandsecure in place at the detectorby aca-
ble strap (fig. 12).
3.Knock out the entire cable entry in the plastic section.
4. Fit the detector housing onto the conduit connection and detector,
tighten the housing screw.