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Pilkington
DATASTOP glasses can be used in a wide variety of
applications where protection from electronic interference
is needed.
Typical
installations include :
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Fully
screened buildings, individual floors in a building or
individual rooms in a building
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Electronic Instrument Panels
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Hospital Operating Rooms
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Embassy Glass
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Recording Studios
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Airport Control Towers
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Shielded Cabinets
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Monitor Screens
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MRI
View Windows
Office
Partitions
Computer Rooms
House
Windows
SCIF's
For internal
rooms, cubicles or partitions the laminated (TL) versions
are recommended while for external glazing, the sealed unit
(TD) versions should be used.
When offices
are being refurbished for EMI control purposes, the window
can be replaced or alternatively a single piece secondary
sash can be installed using laminated or double glazed
DATASTOP.
For new
office complexes incorporating computer facilities and
terminals, the complete glass curtain wall can now be
screened using DATASTOP glass. The advantage of
discussing such screening methods at the design stage cannot
be overstressed, since there is the option for screening the
complete building envelope incorporating excellent solar
control and thermal insulation as necessary.
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In order
to maximize the screening effect of the whole building it is
essential that the total periphery of the glass is
electronically connected to the metal window frame which in
turn should be connected to the screening material in the
wall.
After
installation an initial "audit" is recommended to measure
the attenuation of the total screening. This should be
repeated periodically.
DATASTOP glass carries a 10 year warranty and requires
no maintenance beyond that required for any conventional
glass.
As with
all double glazing units, "Datastop" units for external
glazing should be installed in accordance with good
practice, and following the recommendations in the leaflet "Insulight"
double glazing units - Installation and Maintenance.
Skylights
RF Shielded Glass Walls
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The
signal attenuation of DATASTOP Glass is achieved by
the use of several layers of specially developed coatings
which are effective in the electric field by reflection of
the signal. The attenuation provided will depend on the
characteristics of the signal, and the electrical connection
at the glass edge.
The unit
of attenuation is a logarithmic one, the decibel (db). The
graph in Figure #1, shows the relationship between decibels
and the percentage attenuation (reduction) in the electric
field.
Figure #1
The
attenuation performance was measured using a test sample of
approximately 1m² inserted in the wall of a 2.5m cube
screened room for frequencies up to 1GHz (1000 MHz). For
frequencies above 1GHz a 1 meter cube screened enclosure was
used.
This method is based on the specification
in US Military Standard MIL-STD-285C and consists of
measuring the transmission between two aerials 2 meters
apart. The attenuation of the glass is measured by comparing
the transmission through the glass when glazed in the
screened room, with the signal strength in open field
conditions. (See Figure #2)
Figure #2
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