B45IRCINS4 V4.0 IR Classmate & IR Classmate
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Soundfield ‒ Reference & Installation Guide
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IR Classmate & IR Classmate
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Soundfield ‒ Reference & Installation Guide B45IRCINS4 V4.0
5. Deciding the easiest cabling run
Take advantage of existing features such as any wooden picture rails or perhaps notice
boards (it is much easier to fit cable clips to wood than plaster). If you have a false
ceiling the cable can be run above it. Sometimes using a piece of plastic mini trunking
for any difficult runs is a good solution.
The cable to the detector will usually look better if it is placed in mini trunking, but
it’s wise not to rely on the glue alone and to screw the trunking to the ceiling.
This is usually best done by discussing the options with the
school staff. Make sure that there is adequate access to
open the door and operate the controls!
Do not fit in direct sunlight or over a heater. Do not fit a
spur switch or large trunking directly beneath the unit as
this will impede access to the connectors.
It should not be necessary to adjust the controls during a
lesson so the IR Classmate unit does not actually need to be
beside the teacher although it is a good idea to mount it
near to where a laptop or TV might be used. Mounting the
unit away from little fingers is also a good idea and, of course,
do not forget that you also need a 13A mains socket to
power the system. The socket or switched spur, if used,
should be labelled ‘Do not switch off’ or ‘Leave on’.
Information note: each IR Classmate system has 2 channels
to receive 2 separate infra red transmitters simultaneously
from the same dome sensor ‒ typically a pendant one for
the tutor and a hand held
one for class participation.
The microphone channels
are identified as A and B.
Each transmitter has an
internal switch to change
between A and B as required.
Mic A is usually bodyworn,
mic B is usually handheld.
4. Deciding where to mount the IR Classmate amplifier
Leave at least 100mm
clearance above and
below unit for fitting
and connectors
100mm
min.
Position for fitting
a hook for
rebroadcasting
to an fm
transmitter
(part no:
45SIBKFMGB).
IR Classmate & IR Classmate
+
Soundfield
IR Classmate & IR Classmate
+
Soundfield
3. Deciding where to fit the infra red sensors
The infra red sensor picks up both direct and reflected signals. The 360
°
ceiling
mounted sensor included as standard will adequately cover most classrooms. A 150
°
wall mounted sensor is available for coverage of ‘dead end’ or non reflecting areas.
Normal room:
1 dome sensor
L-shaped room:
1 dome 1 wall sensor
Large room: 2 dome sensors
360
°
150
°
The infra red sensors need to be positioned so that they provide coverage of the
whole room. In large or strangely shaped rooms it may be necessary to fit additional
sensors.
The dome sensor is normally fitted near the centre of the room and as far away from
lights or other obstructions as possible.
