Concrete Wall - Quicksafe.co.uk

siennatearfulUrban and Civil

Nov 25, 2013 (3 years and 6 months ago)

84 views

Do’s and Don’ts in


Wireless Technology

Wireless Technology
-

Overview

Minimize the number of RF obstacles

Obstacles: anything that reduces/blocks RF signals

Transmitter

Receiver

3
Obstacles

2
Obstacles

Transmitter

Wireless Technology
-

Overview

The weakening of RF signals is proportional to the
obstacle thickness.

High Reduction

Transmitter

Receiver

Transmitter

Low Reduction

Receiver

Wireless Technology
-

Overview

A minor change of location could result in stronger RF
signal.

3
m

0.2
m

Wireless Technology
-

Overview

Concrete walls will screen and reduce RF signals more
than the ordinary brick wall.

Concrete Wall

Transmitter

Receiver

Wireless Technology
-

Overview

Metal wall acts as solid screen and will dramatically
reduce or even eliminate the reception of RF signals

Transmitter

Receiver

Depletion of Signal

Metal Wall

Wireless Technology
-

Overview

Transmission Waves

Installing Transmitters/Receivers directly on Metal wall
will result in RF wave reflections, which may cause
saturation or distortion.

Transmitter

Transmission Deflection

Receiver

Reception Deflection

Deflection Waves

Metal



Metal

Metal Wall

Wireless Technology
-

Overview

Wired fence will similarly cause RF signal reduction,
but to a lesser extent compared with metal walls.

Transmitter

Depletion

Reflection

Receiver

Wireless Technology
-

Overview

Reinforced Concrete Walls: This combines the effects of
both concrete walls and wire fences.

Reduction

Reflection

Transmitter

Receiver

Receiver Installation
-

Overview

Choose best location for optimum reception of
transmitters.

Receiver

The Receiver should be at least
1.50
m above the floor.

Receiver Installation
-

Overview

1.5
m

Avoid installing the Receiver in close proximity to:


Metal based construction


Magnetic fields and High Voltage


Sources of radio interference

HIGH
VOLTAGE

Receiver Installation
-

Overview

Normally Transmitters should be installed at least
1.70
m above the floor.

1.7
m

Transmitter Installation
-

Overview

Don’t install
2
transmitters within a distance shorter
then
0.5
meter between them.

0.5
meter

Transmitter Installation
-

Overview

Be aware of indirect multiple obstacles

Control
Panel

Detector

Detector

Transmitter Installation
-

Overview

Sometimes small shift in the transmitter location will
greatly increase the strength of RF signals received.

Control
Panel

Detector

Detector

Metal
Door

Transmitter Installation
-

Overview

Magnetic Contact
-

Overview


It is recommended that Magnetic Contacts will be
installed vertically and at least
1.70
m above the floor.

1.7
m

Magnetic Contact
-

Overview

When the door / window frame doesn’t support
installation of wireless magnetic contact, the use of
universal transmitter together with wired magnetic may
provide a suitable solution.

Universal
Transmitter

Front Door
-

Overview

It is important to instruct the End
-
user that Opening and
closing the door should be done on normal paste
(avoiding fast opening
-
closing, i.e. faster than
1
Sec)

1
sec

Front Door

Preventing collisions

Whenever possible, avoid installation of PIR facing
wireless door
-
magnets or wireless keypad, otherwise it
may increase the collision rate.

Room
1

Room
2

If wireless keypad is installed right next to the front
door, make sure to instruct the End
-
user to wait
3
sec.
Before keying the access code.

Front Door

Preventing collisions

Keypad
-

Overview


Taping the arming/disarming code should be done in a
reasonable pace, where each key stroke is clearly felt
and not missed.