IR Classmate Reference Installation Guide V4

IR Classmate Reference Installation Guide V4
IR Classmate & IR Classmate + Soundfield
Reference & Installation Guide
for systems with Swift TX & handheld transmitters
IR Classmate Reference Guide ‒ for users
Pages
1-11
IR Classmate Installation Guide ‒ for setting up
Pages
12-21
Cautions & troubleshooting
Pages
22-23
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IR Classmate & IR Classmate + Reference Guide
Safe battery charging/maximising battery life
Classmate receiver/amplifier
The front panel:
Volume control for
external mic input
Fully charged batteries will last around 8 hours in both beltpack and handheld transmitters. The
service life of the batteries is typically between 1-2 years depending on use.
If using the external charger to charge the handheld microphone, remove from charge the next
day but no harm will occur if left on charge over the weekend.
Volume control for
multimedia auxiliary input
IMPORTANT: in order for the wall unit to charge the batteries automatically and safely,
the wall unit must be LOCKED.
If not locked, the charge cycle will not terminate
and the batteries may overheat and be damaged.
Volume control for
TV/CD/MP3 auxiliary input
Active mic indicators
Power on
and
charging
indicator
lights
Volume
control for IR
transmitter/
Mic A
Volume control for IR
transmitter/Mic B
The bottom panel:
Bass and treble controls
The wall unit must also be permanently powered from
the mains supply.
Charging mode is indicated by red flashing lights on
the wall unit. No sound is produced when the wall unit
is in charge mode.
Always ensure a transmitter is turned off while
charging.
Charge lead for in situ charging
Fuse anti-surge T630mA 20mm
Swift TX transmitters are charged in the unit using the 1.3mm DC ‒ 1.3mm DC charge lead
supplied with the IR Classmate unit. (Part no. X0DIV00)
Handheld transmitters are charged using the 1.3mm DC ‒ 21.mm DC charge lead supplied
with the transmitter. (Part no. X0IR00)
Wall unit fuse
External mic
socket
(mono
6.35mm)
I/P aux 1-2 & 3-4: stereo pair
inputs for connection to
multimedia/TV/CD/MP3 etc.
O/P aux 5 & 6: audio outputs to
external equipment such as a
digital recorder or a personal fm
transmitter for re-broadcasting of
the mixed sound
4 speaker
connections:
wired internally for
the connection of
2 pairs of cables
Full details on the IR Classmate receiver/amplifier are on the encapsulated sheet which should be
stored in the door compartment.
This is also available on www.connevans.info/classmate
IR Classmate and IR Classmate +
The IR Classmate + has all the features of the IR Classmate with the addition of a remote
volume adjust feature for use with a Swift TX transmitter.
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Turn off at mains before replacing fuse.
Use a small coin in the slot and turn
anti-clockwise to open fuse cartridge.
Replacement fuse is 20mm T6 Antisurge
T630mA (Connevans part no: JF630T). Replace
cartridge and tighten securely.
Making the most of the additional audio inputs.
The IR Classmate wall unit provides three additional audio inputs besides the two IR mic
channels. These are two stereo-summed (stereo input-mono output) auxiliary channels labelled
‘Multimedia’ and TV/CD/MP3. These channels are both the same and may be used in mono or
stereo and will accept practically any line level audio signal.
The ‘ext mic’ channel can accept a wired dynamic microphone (low output) where the gain
switch is set to ‘Hi’ or a wired electret condenser microphone where the gain switch is set to ‘Lo’
or ‘Hi’. This channel offers a cost effective way of providing a third microphone channel that can
be used, for example, at the front of the class.
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Using the audio outputs effectively
1. Feeding a personal fm transmitter
If someone in the class uses a radio aid (such as fmGenie) with their hearing aids, the audio output
of the IR Classmate soundfield can be rebroadcast to their receiver by connecting the FM radio aid
transmitter to the IR Classmate wall unit.
The personal FM transmitter may be connected
to either of the aux outputs.
To turn on the Swift TX press and hold the on button until the status indicator lights. Similarly
to turn off or mute the Swift TX press and hold the button until the indicator goes out.
On/Off/Mute
Vol ‒
Status indicator:
Green = on
Alternating red/green = recharge soon
Red
= charging
Orange = charged
Emitter
window
Aux
socket
2. Feeding an inductive loop amplifier
Either of the aux outputs may be used to drive an external inductive loop amplifier.
3. Feeding an audio recorder
Either of the aux outputs may be used to feed an audio recorder (CD/MP3/computer etc.)
via the recorder ‘aux in’ socket. An output lead for an ‘AUX IN’ phono pair is available
(Connevans part no: MXA118D).
4. Feeding additional amplifiers and speakers
In some cases where rooms are very large, or more than six speakers or a zone system is required
where the sound may need to be relayed to another room, one or both aux outputs may be
connected to the aux inputs of another system.
Door compartment
Charge socket
Microphone
socket
Indicator LED
The indicator LED shows green, red or orange, depending on the status or mode of the Swift TX.
In normal use:
Solid green ‒ the Swift TX is on and
working.
When charging:
Solid red ‒ the Swift TX is charging normally
and is turned off.
Alternating green/red ‒ the battery
is low and the unit needs to be recharged.
Flashing red ‒ there is a problem with
charging ‒ refer to fault finding appendix.
No indication ‒ the unit is switched off.
Solid orange ‒ the Swift TX is charged, it is
turned off and the charger has switched to
trickle charge.
Adjusting the neck strap
Correct positioning of a transmitter is important. The Swift TX should be
worn so that the emitter faces forwards and the unit rests about 150mm
(the length of a biro) below the mouth ‒ this means it should sit just
below your collarbone.
Both straps can be easily adjusted as required, using the sliders.
There is enough room to store a Swift TX transmitter, a
handheld microphone and the charging leads, as shown.
150mm
Connevans rebroadcast soundfield connection packs are as follows:
45SIBKFMGB for: Connevans fmGenie transmitter, Phonak SmartLink & SmartLink+,
ZoomLink & ZoomLink+ or EasyLink & EasyLink+
45SIBKINS
for: Phonak Roger Inspiro, Campus
45SIBKFMGC for: Cochlear implant users
Note ‒ replacement straps are available, please see www.DeafEquipment.co.uk
45IRTXSTRAP Replacement strap
45IRTXCLIP Replacement clip
The handheld microphone should be stored with the charge
socket to the top right hand side to avoid straining or
trapping the charge cable.
The two parts of the neck clasp
may be pushed together or
pulled apart either directly or
by sliding.
Make sure that the items in the door do not stick out so that
they could be crushed against the volume controls etc.
IR Classmate & IR Classmate + Soundfield ‒ Reference & Installation Guide
Swift TX microphone transmitter
Vol +
Depending on the facilities in the personal fm
transmitter, the connection may be direct
to the Tx ‘Aux In’ socket or via an attenuated
lead to the Tx ‘Mic’ socket.
Generally, if the soundfield signal is applied
through the Tx ‘Aux In’ socket, the Tx mic will
remain live (usually undesirable) but if applied
to the Tx ‘Mic’ socket, the Tx mic will be muted
(desirable).
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IR Classmate Transmitters
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Battery charging
Changing the rechargeable battery
The batteries in all of these transmitters will last approximately 8 hours.
You will usually need to leave the unit recharging at the end of the day.
To conserve power always remember to switch the transmitter off when
not in use. If a second transmitter is only occasionally used it will need
charging less often.
The rechargeable battery will only need changing very
occasionally ‒ it should last between 1-2 years.
To open battery compartment, press in the centre of the battery
door with both thumbs and slide off.
The battery door is treated with a clear
anti-slip finish to reduce the tendency
to move when worn.
There are two ways to charge a Swift TX transmitter:
1. In situ, using the 1.3 mm DC ‒ 1.3mm DC charge
lead supplied with the IR Classmate unit. (Part no.
X0DIV00). Connect the charge lead into the ‘chg’
socket on the Swift TX and plug into the ‘Charge’
socket of the IR Classmate. Charging is
automatically terminated by the wall unit as long as
the door is locked.
Pull on ribbon tab to release battery.
Use only with the exposed metal end
battery as supplied with the Swift TX.
Other types of battery will not charge.
Rechargeable battery:
1 x 2700mAh high capacity
rechargeable
AA battery ‒ exposed end
(MBRAAHX1VAM).
Position the battery on top of the ribbon tab for easy removal
next time.
It is safe to leave on charge for up to 5 days.
The Swift TX should last
a full school day with
fully charged batteries
‒ please contact our
Soundfield technical
helpline for advice
should you experience
short battery life.
6
Exposed
metal end
This battery is fitted with the exposed metal end against the spring.
2. Using the external charger (part no: 45IRTXHCHG2) plugged into a mains socket.
Charge time is 12-16 hours from flat (i.e. overnight).
When charging, the
multi-colour indicator
will show red.
Side contact
Technical Note ‒ when a battery is first inserted, the Swift TX will
automatically test the battery to make sure it has enough charge.
Charger 45IRTXCHG2 for
charging a Swift TX or
beltpack transmitter
The indicator will show orange for 5 secs while it is testing, followed by green or red for 1 sec:
1.3mm
plug
Green ‒ the battery has enough charge.
Red ‒ the battery needs to be recharged.
A flickering indicator or no indicator ‒ the battery has no charge and needs to be recharged
or replaced.
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Using the Swift TX on external power
Connecting a charger automatically turns off the Swift TX and starts charging it (red indicator).
During charging, a press of the ON/OFF button will suspend charging and return the unit to
ON (green indicator) ‒ in this mode, although the battery needs to be fitted, the Swift TX is
now powered from the charger rather than the battery.
Using external power will preserve battery life when connected to an external sound source.
Auto power-off
Remote volume control feature
‒ for use with IR Classmate +
When used with an IR Classmate +, the Swift TX can be used to
remotely adjust the channel volume.
The Swift TX monitors the sound level and if the level drops below approx 76dB SPL for more
than ten minutes, then the unit will switch off automatically to preserve the battery.
A short press of the + or - button on the top of the transmitter
will increase or decrease the current volume by 1.5dB.
Dual directional microphones
Holding down the + or - button will change the volume at the
rate of 6dB per second.
The Swift TX uses two separated microphones (Left and Right) to provide a constant
transmitted voice level as the user’s head is turned from side to side.
The optimised dual microphone design also provides ideal pick up of the user’s voice and
rejects unwanted sounds in all other directions.
This means that you don’t get a variation of volume as the speaker moves their head from
side to side.
Microphone
Microphone
Volume up
The range of remote volume adjustment is +/- 15dB and allows
the user to temporarily adjust the volume of their voice from the
IR Classmate +.
Volume down
To reset the volume to the default manual setting on the
IR Classmate + unit, press both the + and - buttons
simultaneously.
The IR Classmate + volume will reset itself to the manual setting
when the IR Classmate + is turned off.
Volume reset
Note ‒ the remote volume control function will only work
with new IR Classmate + and IR Swift + models.
Compatibility with the remote control feature is indicated by
the ‘+’ suffix.
Wirefree connection of an external sound
source
H yp
ge
er w i d
e microphone covera
The Swift TX transmitter can be used as a ‘remote
transmitter’ in situations where it is not convenient
to make a wired connection from an external
AV source to the IR Classmate amplifier.
Microphone gain settings
The Swift TX microphone gain control is factory set and will not need adjusting.
Channel change
The IR Classmate unit has two mic receiving channels A & B. The Swift TX A/B channel
change switch is in the battery compartment.
Pendant, beltpack or handheld transmitters can be used on either channel.
The Swift TX is normally used on channel A. However
it can be easily changed to channel B as follows:
Open the battery compartment.
Inside, just above the battery, you will be able to see
a small switch labelled ‘A channel B’.
Use the end of a paperclip to slide the channel
switch.
Always replace the battery compartment cover
afterwards.
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IR Classmate & IR Classmate + Soundfield ‒ Reference & Installation Guide
For the Swift TX , connect the external device into the
‘aux’ socket on the side (3.5mm mono or stereo).
A standard lead may be used e.g.
MXA117 ‒ 3.5mm stereo jack to jack for use with
headphone socket eg. a computer or iPod
MXA121B ‒ 3.5mm stereo to phono pair for use with TV
(a SCART adaptor may be required)
Aux socket
Note ‒ it is still possible to use the Remote Volume Control feature when using a Swift TX
transmitter as a remote transmitter with an IR Classmate +.
When using the transmitter, place the unit so that the emitter (on the
front) is not obstructed and is facing towards the IR sensor.
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Changing the rechargeable batteries
Handheld microphone transmitter
The rechargeable batteries will only need replacing very occasionally ‒ depending on use,
it will last between 1-2 years.
IR emitter
Controls
IR emitter
On/off (mute)
switch
Power status:
green light = good
red light = recharge now
no light = dead batteries
7
Holding the microphone transmitter
It is important to hold the microphone in the
middle so that the emitters are not being
covered by your hand.
Depending on use, the handheld microphone may only need charging
every 1-2 weeks (approx. 10 hours use).
Pull out the old batteries. Replace
with two new rechargeable
batteries, taking care to place the
battery with the exposed end in
the side with the spring at the
mic head end and the contacts
beside the spring. This is
essential for correct charging.
Right battery ‒ exposed end
This battery is fitted with the
exposed metal end against
the spring and the side
contact.
High capacity rechargeable AA
battery ‒ exposed end
(MBRAAHX1VAM).
Screw cover back on.
7
Emitter windows
Charging
To open the battery compartment, unscrew
the metal sleeve below the switch and slide
the cover off.
Charge
socket
Side contact
Left battery
Exposed
metal end
High capacity
rechargeable
AA battery
(MBRAAHX4 ‒ pack of 4).
Remember to switch off the handheld microphone before charging.
There are two ways to charge the handheld microphone:
Channel change
Most users will never need to change the channel of the handheld microphone. If one
Swift TX and one handheld mic are being used, there will be no need to change channels.
In situ ‒ using the lead supplied with the handheld
microphone ‒ plug into the end of the handheld
microphone and into the ‘charge’ socket of the wall unit.
Ensure the charge socket goes to the top right hand side of
the door to avoid straining or trapping the charge cable.
More than one pendant or handheld microphone transmitter can be used on either channel
for team teaching as long as only one is switched on at any one time.
To use two of the same type of microphone simultaneously,
then one will need to have its channel changed.
Charging is automatically controlled by the wall unit as long
as the door is locked. If the door is not locked, the charger
cannot switch off automatically and the batteries may be
damaged if left on charge for more than a couple of days.
Using the external charger
(part no: 45IRTXHCHG2) plugged
into a mains socket. Charge time is
16-20 hours from flat (i.e. overnight).
The handheld transmitter is normally used on channel B.
However, if required, it can be changed to channel A as follows:
Unscrew the battery cover and the switches will be easy to see
just above the battery compartment.
2.1mm
plug
Use the end of a paperclip or a small screwdriver to slide the
channel switch between channel A and channel B as required.
Please note that the label fitted to the outside of the
battery compartment indicates the switch positions as
‘CH1’ (= Channel A) and ‘CH2’ (= Channel B).
The left hand switch should always be left on ‘Hi’.
Do not leave the handheld
transmitter on charge for more
than a couple of days.
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Hi
CH2 (B)
Default setting:
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IR Classmate & IR Classmate + Installation Guide
An overview of the installation steps are:
Check contents of kit, you should have the following:
Microphone transmitters
‒ as ordered, such as:
IR Classmate & IR Classmate + Soundfield
IR Classmate amplifier
and wall fixings
Swift TX pendant
transmitter
1)
2)
3)
4)
5)
6)
7)
8)
Charge transmitter batteries for testing purposes.
Decide where the speakers are to be fitted.
Decide where to fit the Infra Red sensors.
Decide where to mount the IR Classmate amplifier
Decide the easiest cable run for the speakers and sensors.
Install the system.
Setting up and testing the system.
Demonstrate and set the volume level for the user.
1. Charge batteries now
The rechargeable batteries inside your transmitter require charging before use. In order
to be able to test the system once it is installed, we recommend you use the external
charger, if you have one, to start charging the transmitter. Alternatively, you could plug
the unmounted amplifier into an available socket and start charging the transmitter
before carrying on with the installation.
Dome sensor
& mounting box
Handheld transmitter
2 pairs of speakers
(3 pairs for a 6 speaker system!)
Even an hour or so will give enough charge to test the system ‒ 1 hour charge gives
40mins use.
18 metre length of 75 Ohm
special co-ax cable (or
on a reel for larger
installations, whole
reel will fit 5
classrooms)
2. Deciding where to fit the speakers
Firstly please do not think home hi-fi and put the
speakers in the corners, at waist level and point them to
the centre of the room ‒ this is the worst possible thing
to do!
2 F-connectors
& 1 boot
100m reel of speaker cable
(we know this is
too much cable,
but 100m reels
are the cheapest
form of supply)
1 box of speaker
cable clips (using a
cabling staple gun is
preferable if
you have
one)
Charging lead for IR Swift TX
transmitter
IR Classmate & IR Classmate + Soundfield ‒ Reference & Installation Guide
window
The positioning of speakers is often dictated by physical
objects such as windows. You have to fit 4 (or 6) speakers
so adapt your ‘lighting’ plan to give the best pattern for
the students ‒ perhaps avoiding the window, an unused
end of a classroom or a teachers desk.
Instruction sheets:
IR Classmate Tutor Courtesy Card
IR Classmate Amplifier control & feature card
Wall signs
Mounting instructions
This Reference & Installation Guide
12
Placing loudspeakers for a classroom soundfield is more
like deciding how best to light a room using 4 small
lamps. If you think ‘light’ you will not go far wrong, i.e.
fitted above head height (2 to 2.5 metre high) each over
a 1/4 of the room pointing down on the area to be
covered.
Speaker position allowing for a window
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3. Deciding where to fit the infra red sensors
IR Classmate & IR Classmate + Soundfield
4. Deciding where to mount the IR Classmate amplifier
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.
360°
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.
150°
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’.
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.
100mm
min.
Normal room:
1 dome sensor
Leave at least 100mm
clearance above and
below unit for fitting
and connectors
Large room: 2 dome sensors
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.
Position for fitting
Mic A is usually bodyworn,
a hook for
mic B is usually handheld.
rebroadcasting
to an fm
transmitter
(part no:
45SIBKFMGB).
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.
L-shaped room:
1 dome sensor + 1 wall sensor
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6. Install the system
Connecting the speaker wiring
IR Classmate wall mounting
There is an separate A3 sheet which has a template and guidance
for mounting the IR Classmate wall unit. Using this template makes
drilling the correct holes simple and prevents drill debris from
contaminating the IR Classmate wall unit. Do not place the unit on
the wall until all drilling and dust making activities have been completed.
1
Pass the two speaker cables from behind the
unit through the rectangular hole by the
speaker connectors or through the rubber
grommet with the mains cable. The cables
then follow around the right hand corner of
the unit and through the speaker cable
clamp.
Speaker Mounting
2
Prepare the speaker cable ends.
3
Place each speaker cable pair into the
appropriate connector, observing the
correct polarity.
4
Lay the speaker cables on top of each other
and tighten the cable clamp.
Wall mounted speakers Wall mounted speakers must be
mounted horizontally to allow them to be angled down.
Ceiling mounted speakers When fitting ceiling tile speakers always ensure that
cabling or other loose items are not left across the back of the speaker tile ‒ anything
left in contact with the speaker tile will cause distortion or buzzing.
The ceiling tile speakers supplied by Connevans may be 4 Ohms (4
speaker system) or 8 Ohms (2 speaker system) and are wired in the
same way as the wall speakers.
Four speaker wiring
red
black black red
red black
red black
red black
red black
red
red black
red black
red black
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black black red
red black
red black
red black
Speaker cables
come from behind
the unit, through
the cable clamp to
the connectors
Fitting the F-connectors
The infra red sensors are connected to the IR Classmate amplifier using the provided
co-ax cable and F-connectors. Place the boot on the amplifier end of the cable
before stripping!
Speaker wiring
Speaker wiring ‒ one cable run down each side of the
classroom wiring 2 (or 3) speakers in parallel. It is important
to maintain the correct polarity when connecting the
cable so we suggest connecting the black trace wire to the
black terminal(!) (Each speaker is 4 Ohms thus for 4
speakers we now have 2 Ohms on each cable).
The IR Classmate has 4 terminals ‒ red, black, black, red.
Connect the two cable runs, one to the left pair and one to
the right pair, again maintaining correct polarity ie black
trace wire to the black terminals.
Six speaker wiring
Speaker
cables
coming
through
hole in
back of
cabinet
(The terminals are wired internally to connect the two cable
runs in series making the load on the amplifier 4 Ohms. The
actual amplifier connections are the 2nd and 4th terminal
as viewed from below, which you would need to know if
you wanted to test the amplifier with just one speaker)
The cable is white with a black stripe along one wire. The
white only wire should always be connected to the red
terminals and the black stripe wire always to the black
terminal.
IR Classmate & IR Classmate + Soundfield ‒ Reference & Installation Guide
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1. Cut back 15mm of outer casing. Fold back
the copper braid and remove the foil.
2. Cut back the inner insulator to leave 9mm
of the copper core protruding.
3. Screw the F-connector onto the cable. The
end of the inner insulator should be flush
with the inside of the connector.
4. Trim off any visible braiding.
Screw the plug to either connector on
top of IR Classmate and pull the boot
over the connection.
To avoid expensive damage, check assembled cables for short circuits before
connecting to the IR Classmate amplifier.
Sensors can be connected to either plug on the top left of the amplifier. When wired
properly, the red LED on the sensor will light when the system is turned on.
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Mounting the infra red sensors
7. Setting up and testing the system
Dome sensor mounting is dependent on the type of ceiling in the classroom.
Checking the operation of the IR Classmate amplifier and speaker system
1
The mounting plate can be bent to allow space for the
F-connector and cable and be screwed directly to the ceiling.
The easiest way to check the system is to connect a portable radio, MP3, laptop or CD
player into one of the auxiliary inputs (numbered 1 to 4). Adjust
the appropriate volume to a suitable level and walk around the
room, checking for a reasonably constant sound level and lack of
distortion or buzzing from any particular speaker. Buzzing or
distortion from a particular speaker may indicate a faulty speaker
or loose mount.
2
If a mounting box is used, the box is fitted
directly to the ceiling and the sensor is fitted
to the lid as shown.
A 3.5mm to phono plug pair lead is supplied in the Connevans
Soundfield AV lead pack (45SIBPK1) if this has been purchased.
Solid ceiling ‒ direct or with mounting box
The cable exit hole is drilled by the installer to
suit the trunking used.
Check the transmitter
As long as the transmitter has been on charge for at least 30 minutes, you will have
enough charge in the batteries to test and demonstrate the system.
Suspended ceiling
Switch the Swift TX transmitter on. Check that the left ‘Mic A’ green LED lights. Ensure
the microphone is positioned about 150mm from the mouth and talk whilst increasing
the 'Mic A' volume on the IR Classmate until you can hear it clearly without causing
feedback whistling.
The mounting plate can be removed
and used as a template for drilling
holes in the ceiling tiles.
Walk around the room whilst talking. There should be no places where the sound cuts
out or sounds noisy. This is much easier to do if you can find someone else to listen to
the sound whilst you walk around the room.
Wall mounted sensors should be mounted between
2 and 2.5m above the floor. Preferably not higher than the
speakers.
The bracket for the wall mounted sensor needs to be bent
70mm from the flat end of the bracket.
18
Swift TX pendant microphone transmitter:
Place round neck and adjust neckstrap to
correct length.
150mm
Wall mounted sensors
70mm
IR Classmate & IR Classmate + Soundfield ‒ Reference & Installation Guide
B45IRCINS4 V4.0
B45IRCINS4 V4.0
IR Classmate & IR Classmate + Soundfield ‒ Reference & Installation Guide
19
IR Classmate & IR Classmate + Soundfield
IR Classmate & IR Classmate + Soundfield
8. Demonstrate and set the volume level
for the user
It is important that the soundfield is set up properly. We have
found that most users tend to set the system too loud. This is
unnecessary and undesirable. The golden rule is "if the user of
the transmitter can hear themselves very clearly from the
speakers, then the volume is too loud". It is difficult for the
person talking to judge the level of their own amplified voice.
There are two ways to set up a soundfield properly; one uses a
sound level meter and the other relies on the subjective judgement of another person.
Both methods require two people with the class teacher preferably being the one
doing the talking.
Setting the correct volume level
This is normally only necessary upon installation. In normal use, from person to person,
it is not necessary to alter the volume since the sound out of the
speakers should be about the same as directly from the person
talking. However, if a particular user has a quiet voice then the
transmitter may be moved nearer to the mouth.
l Wear the microphone as shown.
l Walk to the point in the room furthest away from the IR Classmate
and invite a colleague to join you.
l Switch the transmitter off for the moment.
l Talk in a normal voice to your colleague while they stand about
1 metre in front of you.
l Ask your colleague to remember the average sound level by
either....
a) Using a sound level meter or
b) Remembering the sound level by ear
MXY139A
....and then get them to walk over to the IR Classmate
amplifier.
l Switch the transmitter on.
l Ask your colleague to increase the 'Mic A' volume control on the amplifier, whilst
you continue to talk in the same normal voice as before, until either....
a) the sound level shown by the meter at where they are standing is the same
average value as when they were standing in front of you.
b) until they judge the sound level at where they are standing to be about the
same as when they were standing in front of you.
l The tone controls can now be adjusted if necessary to optimise vocal clarity.
20
IR Classmate & IR Classmate + Soundfield ‒ Reference & Installation Guide
B45IRCINS4 V4.0
l Ask your colleague to walk around the room listening to
make sure that your voice is clear all around the room.
Job done! Don't be tempted to increase the volume much
further as teachers tend to raise their voices in an active
classroom situation!
Once the installation has been carried out, please do not
underestimate the importance of ensuring that the teacher
has the opportunity to experience listening to another
person using the system. There are two reasons for this: firstly so that they become
impressed at the natural sound and secondly it is hard for anyone to listen objectively
to their own voice. It is also an excellent opportunity to ‘play’ at using the system with a
colleague, allowing the teacher to gain confidence with their own ‘performance’.
If the system has been supplied with a handheld microphone you must now go
through the same procedure with this microphone using the ‘Mic B’ volume control.
Leaving the IR Classmate in a ready state for the user
If the transmitter batteries were not fully
charged before testing and setting up the
system, switch off the transmitter and plug
the charger lead from the amplifier into the
transmitter charger socket.
The IR Classmate should enter charge mode
within a couple of seconds, shown by the
flashing red indicators and the transmitters
red LED on the transmitter will light.
Place the transmitter, complete with
microphone, into the door of the IR
Classmate and lock the door. The system
will automatically switch off when
charging is done.
Warning: Automatic switch off ONLY
occurs when the door is locked.
Excessive charging will eventually
damage the batteries.
Swift TX transmitters are charged with a
1.3mm plugged charge lead (part no. X0DIV00)
Charge the hand held microphone
midweek or as required.
Note: Only one transmitter may be charged
at a time.
B45IRCINS4 V4.0
Handheld transmitters are charged with a
2.1mm plugged charge lead (part no. X0IR00)
IR Classmate & IR Classmate + Soundfield ‒ Reference & Installation Guide
21
IR Classmate & IR Classmate + Soundfield
IR Classmate & IR Classmate + Soundfield
Cautions:
!
Do not allow the door to swing open ‒ either use it shut or fully open, to
reduce the probability of someone hitting their head on it.
Trouble shooting:
If the IR Classmate does not operate as expected check the following:
Symptom
The unit will become warm during normal use.
Probable cause/remedy
Main unit
The inside front panel will become hot when the system is producing continuous loud
sound.
No red indicator lights
Unit unplugged, switched off or fuse blown
Open the door if the unit is to be used for extended periods (i.e. more than ten
minutes) with loud or continuous sound such as music or if the ambient temperature
is above 30°
C.
Red indicators solid but no sound
Volume control too low, transmitter not on,
speaker cable disconnected
Red indicators flashing and no sound
Unit in charge mode
Do not block the ventilation holes at the bottom and top of the unit.
No green 'Signal' indicators
Transmitter unit not functioning ‒ check led
indicator on transmitter.
Do not allow the tip of the charger lead to touch any metallic object, including the
casework of the IR Classmate. Store the charger plug safely in the insulated door pouch
when not in use or remove from the front panel socket.
Microphone transmitters ‒ all types unless specified
The charger in the IR Classmate is designed only to charge Connevans infra red
transmitters which contain Ni-MH batteries of 2800mAh capacity. Do not attempt to
charge other devices, battery types or use for other purposes.
Do not use non-rechargeable batteries in IR Classmate transmitters as this may cause
damage.
Do not expose the IR Classmate to rain or moisture.
No light on transmitter
Batteries dead or incorrectly fitted
Alternating green/red light on
Swift TX transmitter
Batteries need recharging
Red light on handheld transmitter
Batteries need recharging
Green light on transmitter
but no green light on wall unit
Receiver not receiving the IR signal.
‒ Check that microphone emitters are not covered
or pointing into non-reflective area.
‒ Check dome sensor is not obstructed and look for
red LED in centre. No red LED indicates no
connection between sensor and wall box so check
wiring on F-plug connectors.
No red light on infra red sensor
Coaxial cable connections faulty or internal fault
caused by short circuit
Distorted, whistling and generally
nasty sound
Two transmitters on the same channel will cause this
‒ turn one off. Has your colleague from next door
come in wearing their transmitter?
Do not fit in direct sunlight or over a heater.
The IR Classmate wall unit MUST be earthed.
For continued protection, replace the fuse only with the same type and rating i.e.
Antisurge T630mA.
Hazardous voltages exist inside the IR Classmate unit.
No user serviceable parts inside.
Feedback whistling all the time or
‘Mic’ volume too high. Microphone too far away
when the user of the transmitter speaks from user's mouth.
Refer servicing to authorised representatives of Connevans Limited.
Remove the mains plug from the wall socket before undertaking any servicing
operations.
The IR Classmate is manufactured by:
Connevans Limited
Bridge House, 1 Nutfield Road, Merstham, Surrey RH1 3EB
Helpline 01737 247571 [email protected]
22
IR Classmate & IR Classmate + Soundfield ‒ Reference & Installation Guide
Sound too bright or boomy
Adjust the tone controls to suit the acoustics of the
room and speakers
Sound distorted
Reduce the volume of the appropriate channel.
The system is only intended for speech and music
in an average size classroom giving up to
about 90dB SPL.
Handy hint: You can easily check if the transmitter emitters are working by pointing a
mobile phone camera at them ‒ you don’t need to take the photo but the emitters will
show up really clearly! The camera will see the infra red light from the emitters.
B45IRCINS4 V4.0
B45IRCINS4 V4.0
IR Classmate & IR Classmate + Soundfield ‒ Reference & Installation Guide
23
Connevans Limited
Equipment for Deaf and Hard of Hearing People
in Education, Employment, the Home & Leisure
Bridge House, 1 Nutfield Road, Merstham, Surrey RH1 3EB
Telephone 01737 247571
Email [email protected]
Information www.SchoolSoundfield.co.uk
Shop online www.DeafEquipment.co.uk
© 2013 Connevans Limited
B45IRCINS4 V4.0 IR Classmate Soundfield Installation & Reference Guide
Oct 2013
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