Planning
5
29
Vanderbilt
Seismic Detectors Application Guide
I-200153-1
08.2016
Listed below are some instances that should be avoided, which will result in a more stable and reli-
able detection system.
Take additional precaution to avoid mounting the detectors in close proximity to the following:
Electric motors, transformers, fans, air conditioners, and any electrical devices that may emit
mechanical vibrations.
If possible, avoid mechanical contact between such devices and the protected surface, or
reduce the vibrations by using suitable insulating materials.
The flow of water through pipes that are in mechanical contact with the protected surface can
produce a strong interference signal. This signal may cause unwanted alarms.
Insulation of the pipes will reduce the risk of unwanted alarms.
Door bells or other types of bell signalling may cause unwanted alarms if they are in close
proximity to a seismic detector. A solution may be to change the bell to an electronic audible
warning device or to supress the tone generated by the bell dome. Suppression may be
achieved by adjustment or insulation.
One source of noise that may be difficult to avoid is human activities within the building. Noise
can be generated by walking on hard floors, stairs and other activities. Noise that is generated
by the occupants of the building can be reduced by adding carpet to the areas that are in close
proximity to the protected space.
5.4
Installation guidelines
The tables in Section 5.4.1 Detector Requirements and Section 5.4.2 System Requirements show
some suggested headings and some sample data to assist planners and designers of new systems
and system upgrades.
Vanderbilt recommend that planners create their own version of these tables and insert the rele-
vant information under the headings in these tables to assist with planning and as a means of re-
cording all of the salient information.
The information in Table 5-1 is to assist with the detection requirements of the area to be protected
and to ensure that the required inputs and outputs are available to complete the system require-
ments.
5.4.1
Detector Requirements
Table 5-1 gives examples of the number of zones and outputs required to complete the seismic
application. The table also details the mounting surface and provides prompts for the accessories &
test methods for the seismic installation.
Detector Location /
Ref
Surface*
Installation*
Testing*
Protection*
Monitoring* Others -
(specify)
# 1
Steel
Concrete
Direct
GMXP0
GMXB0
GMXW0
GMXC2
GMXS1
GMXS5
GMXD7
GMAS6
GMXP3
GMXP3Z
# 2
# 3
# 4
# 5
# n
Table 5-1: Detector requirements
*Delete as required
See Table 6-4 for an example of a completed form.
5.4.2
System Requirements
Table 5-2 gives examples of the components of the system, the locations of the components, and
the power supply details. This will assist in routing cables to these locations or in deciding if an ex-
pander should be located closer to the risk to save on additional cabling.
This table can help to identify if an existing system has the capability to accommodate the required
inputs and outputs for the seismic application.
