Campbell NOR 140 User manual

Campbell Associates Ltd
Sonitus House,
5b Chelmsford Road Industrial Estate
Great Dunmow, Essex CM6 1HD
T . [phone]
F. [phone]
[e-mail]
Registered Office: 12 Alma Square, Scarborough, North Yorks YO11 1JU Registered Company No 3700715 www.campbell-associates.co.uk
USER SET UP GUIDE FOR BUILDING ACOUSTICS
SET UP NOR 140 FOR AIRBORNE TESTING
1. Setting up Nor 140
1.1 Measurment Standard
The BS ISO 140-4 is superseded by BS EN ISO 16283-1:2014. The BS ISO 140-4 is no longer current
but is cited in the Building Regulations for England and Wales, Northern Ireland and Scotland. The
Irish regs (SITRI) use ISO 16238 universally.
Applies to sound insulation within a pair of rooms. Determines the steady state 1/3 octave band
filtered white noise level difference and the receiving room equivalent absorption area from which
the standardised level difference is derived. The results can be used to determine whether building
elements have met acoustic specifications, e.g. Building Regulations.
The Norsonic building acoustic kit meets both the BS ISO 140-4 and BS EN 16283-1:2014 standard.
1.2 Nor 140 field calibration
The field calibration of the Nor 140 for building acoustic testing takes place in the normal mode and
will occur as a standard calibration via the orange ‘CAL’ key. Note: Used calibrator - Nor 1251 Class 1
calibrator –114 db at 1kH
1.3 Set up Nor 140 for Airborne Testing
To start a measurement for airborne testing you need to select the building acoustic mode –press
#7 on the key pad to choose your mode. You will find Building acoustic mode under #4 –see fig 1.1.
Select airborne testing via #3 –see fig 1.2
Fig 1.1 #7 Mode Options Fig 1.2 #3 Airborne Testing

Campbell Associates Ltd
Sonitus House,
5b Chelmsford Road Industrial Estate
Great Dunmow, Essex CM6 1HD
T . [phone]
F. [phone]
[e-mail]
Registered Office: 12 Alma Square, Scarborough, North Yorks YO11 1JU Registered Company No 3700715 www.campbell-associates.co.uk
1.3 Airborne Testing Settings
Figure 1.3 illustrates all the positions that need to be measured.
Fig 1.3 Measurement definations
Press SETUP to select the correct setting to do your assessment.
Fig 1.4 SETUP Screen Fig 1.5 Noise Gen. Settings Fig 1.6 Rev. Setup
1) Instrument menu: Set IO Print to RS232 –this allows the meter to control the
amplifier for RT’s.
2) Measurement duration: The minimum measurement duratation is 6 seconds for
fixed positions measuremtns.
3) Noise generator: Noise generator off –Sync ON –Type PINK –Gain 0 dB –
Equal OFF. See fig 1.5
Note: Equalizer changes specturm output from speaker –
Mainly for RTs usually in larger rooms as its affective by the
preformance of the room.
4) Reverberation: Max RT 4s –Ex. Type NOS –Ex.time 5. See fig 1.6
V
Volume
S
Surface Area
L1
Source Room
L2
Receiver Room
T
Reverberation time
Lb
Background Noise
Type
NOS
Speaker Output
IMP
Impulse f.e. Balloon pop
EXT
External Source

Campbell Associates Ltd
Sonitus House,
5b Chelmsford Road Industrial Estate
Great Dunmow, Essex CM6 1HD
T . [phone]
F. [phone]
[e-mail]
Registered Office: 12 Alma Square, Scarborough, North Yorks YO11 1JU Registered Company No 3700715 www.campbell-associates.co.uk
Reverberation time is defined as the length of time required for sound to decay 60 decibels from its
initial level. The excatation is the time the speakers blasts –nomally 5 secs is a sufficient amount of
time to fill the room with energy.
NOR 280 AMPLIFIER & NOR 276 DODEC SPEAKER & MEASURMENTS
2. The Equipment
2.1 Setting up the Equipment
The full kit contains:
-Nor 140 EXP Sound level meter
-Nor 280 Amplifier
-Nor 276 Full dodec speaker
-Nor 4514A RT cable
To set up the equipment follow the steps below:
1) Conect the Nor 280 amplifier to the Nor 276 dodec speaker via supplied cable and choose
your first speaker position;
2) Connect the amplifier to mains power;
3) Turn amplifier on at -35 dB and select Pink noise. You should be able to hear the speaker
softly –you can now control the speaker by using the remote control. The LED on the right
top of the amplifier implicates if the speaker is ON or OFF.
The supplied Nor 4514A RT cable only needs to be connected to the amplifier when the RT
measuremets are taking place. The cable alows the meter to control the speaker –You can test if
this is working by turning the noise generator ON and select LINE on the amplifier.
2.2 The Measurements
1) Source room
-Choose speaker position;
-Turn speaker OFF wih remote control;
-Select PINK noise and -5 dB on the amplifier;
-Put on your hearing protection;
-Turn speaker ON with remote control;
-Do 6 measurements at different representative positions - min 6 sec;
-Turn OFF speaker with remote control and scroll to L2 with the arrow key.
2) Reciever Room
-Leave speaker in source room at the same position;
-Turn speaker ON with remote control;

Campbell Associates Ltd
Sonitus House,
5b Chelmsford Road Industrial Estate
Great Dunmow, Essex CM6 1HD
T . [phone]
F. [phone]
[e-mail]
Registered Office: 12 Alma Square, Scarborough, North Yorks YO11 1JU Registered Company No 3700715 www.campbell-associates.co.uk
-Do 6 measurements at different representative positions - min 6 sec;
-Turn OFF speaker with remote control and scroll to Lb with the arrow key.
3) Background Noise –in receiver room
-Do a minimum of 4 (6 recommended) measurements at different representative positions -
min 6 sec;
-Scroll up to T with the arrow key.
4) Reverberation time –in receiver room
-Move the speaker to the receiver room;
-Select LINE on the amplifier;
-Plug cable Nor 4514a into the amplifier and conect it to the Nor 140;
-Do a minimum of 4 (6 recommended) measurements at different representative positions.
When all the measurements are done to your satisfaction press the ‘store record’ key to save the file
as a full BA file.
After saving the file select L1 and L2 and press delete. Repeat the measurments for L1 and L2 for the
second speaker position.
RESULTS AND REPORTING
3. Results Meter & Software
3.1 Results from the meter
When a complete mesurement is stored the results –the Dntw value - can be seen instantly by
pressing #3 on the key pad. To get out of this menu press ENTER.
To get an overview of your results and to check the CTR value select ‘criteria’. The CTR is the
correction for traffic noise and is standard around 1. Test PASS can be detimined instantly from the
meter. NOTE: this is not required in Ireland for SITRI testing.
For support please contact us on 01371 871 030
or alternatively send an email to [e-mail] and we will assist you.