BRUEL & KJAER 2206 Instruction Manual Download | Manualshive

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Summary of Contents for 2206

Page 1: ...Instruction Manual Precision Sound Level Meter Type 2206 033 0120 2206 Small lightweight Precision Sound Level Meter fulfilling requirements of IEC 179 Bri iel Kj r ...

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Page 3: ...PRECISION SOUND LEVEL METER TYPE 2206 Revision October 1977 ...

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Page 5: ...on with Microphone Type 4148 8 3 5 SOUND MEASUREMENTS 8 General 8 Procedure for Sound Measurements 9 3 6 LOCKING OF CONTROLS 9 Locking the Attenuator 10 Locking the Weighting Networks 11 3 7 CHARACTERISTICS 12 Use of A C Weighting Networks 12 Output Socket 13 Frequency Response 13 Influence of Reflections 13 Directional Characteristics 13 Effect of Vibrations 15 3 8 USE WITH PINK NOISE TEST RECORD...

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Page 7: ...6 085 types 2206 and 2 208 Miniature Sound Level Meters 2206 Building noise insulation and distribution surveys Community noise surveys Product noise measurements for development and quality control Measurements on electroacoustic systems These miniature sound level me ters provide a quick and reliable method of determining noise level They are the ideal tools for noise abatement engineers traffic...

Page 8: ...tentiometer Ronge _ _dB Ro tilier _ _ L lim Froq _Hz VIr Spoed _ _mmf Popo Spoed _ c C hogon 50 25 10 75 dB dB Condenser Microphone 4148 f dB dB 860 Moosuring Obj Microphones Piezoelectric Microphone 4117 u n 30 15 Meters 0 Free Field 2010 1 0 5 o u _ Sign 0 0 430 10dB 2 15 Qp 1124 10 20 Hz 50 100 200 500 1000 2000 5000 0 0 10000 20000 40000 D A B C lin Multiply Fre vency Scole by Z ro t l 1612 21...

Page 9: ...ier Lower Lim Freq Hz W r Speed mm sec PaperSpeed mm sec Copenhagen 50 25 10 75 dB dB dB dB 40 20 8 60 M easuring Obj f f C 3015 6 45 2010 4 30 10 dB 10 2 15 Rec No Date _ _ f A Sign _ _ 0 0 10 20 Hz 50 100 200 500 1000 2000 Qp 11 24 M ultiply Frequency Scale by Zero Level Fig 3 Typical A and C weighting characteristics 740634 Miniature Sound Level Meter 2206 or 2208 Level Recorder 2306 Fig 4 Port...

Page 10: ...0kHz for incidence Response perpendicular to the diaphragm in a free field perpendicular to the diaphragm in a free field Individual calibration curve supplied Individual calibration curve supplied Microphone Sensitivity Approx 14 mV per N m2 Approx 3 mV per N m2 Microphone Capacitance 17 pF 4000 pF Microphone Temperature 0 015 dB C 0 0083 dB F Coefficient Battery Type Single C cell IEC R 14 B K o...

Page 11: ...r Microphone Type 4148 173265 Sensitivity adjustment Protects the diaphragm of the microphone from physical damage This grid should not be removed except when the microphone is to be fitted with a Nose Cone or Rain Cover or for inspection of the diaphragm DO NOT TOUCH THE DIAPHRAGM WITH ANY OBJECT The Condenser Microphone screws directly onto the Microphone Adaptor Type UA 0208 which in turn screw...

Page 12: ...y weighting net works See section 3 7 Lin Gives a linear frequency response within the range limits of the instrument A ten position switch controlling the gain of the input amplifier in 10 dB steps from 30 dB to 120 dB The RANGE SWITCH setting ap pears in the RANGE INDICATOR window on the meter scale Depressing this button adds a further 10 dB to the measuring range When used 10 dB must be added ...

Page 13: ... is not going to be used for a long time to prevent possible battery leakage 3 3 MOUNTING OF MICROPHONE The condenser microphone normally supplied with the 2206 is the 4148 This micro phone has a nominal capacitance of 17pF A high impedance Input Adaptor UA 0208 is necessary to match the small capacitance of the microphone to the rest of the circuitry The UA 0208 contains a high impedance 2000 M 0...

Page 14: ...ty 2 Turn the POWER SWITCH to Batt and check the battery voltage Then set the switch to Fast and the WEIGHTING NETWORK SELECTOR to either C or Lin 3 Set the RANGE SWITCH to either 90 dB if the Sound Level Calibrator Type 4230 is being used or 120 dB if the Pistonphone Type 4220 is being used Allow about 25 seconds for the circuits to charge up 4 Fit the half inch adaptor onto the acoustic calibrat...

Page 15: ...5 Select a meter response time by turning the POWER SWITCH to either fast or slow 6 Allow about 25 seconds for the circuits to charge up 7 If required calibrate the meter as described in section 3 4 Calibration is not nor mally required each time a reading is made unless the user s code of practise states this explicitly 8 Select the desired weighting A C or Lin with the WEIGHTING NETWORK SELECTOR...

Page 16: ... mtact ____ Cover plate Fig 3 1 Removal of Front Cover 3 Lift off the cover plate and spacing washer 4 Remove the green front case of the instrument Note that the 10 dB button fits loosely into this case and that it could be lost unless due care is taken at this stage Fig 3 2 ocophooo Sockot Elevated 0 Hexagon Screw Spacing Washer 4 t ______ Range Knob Cover Fixing Screws _ _ _ _t L Jt Fig 3 2 Loc...

Page 17: ...one NOTE It is advisable to mark by means of a self adhesive label that the RANGE SWITCH of the instrument is locked This will reduce the possibility of damage caused by forcing the switch 3 6 2 Locking the Weighting Networks First follow the procedure in section 3 6 1 for removing the outer cover Having done this loosen the two nuts which hold the locking plate Fig 3 3 Remove the locking plate se...

Page 18: ...2 168217 1 The weighting network used for making a measurement should always be stated e g Sound level A xdB or Sound level xdB A The difference between the two responses is most noticeable for low frequencies Thus if a considerable difference is noticed between the readings with different weighting net works it can be assumed that there are strong low frequency components present A very rough fre...

Page 19: ...en the reflecting surfaces are close to the microphone Meaauring Obj dE d 160 31 15 Free Field Response Pressure Response 4 1 5 Roc No Date Sign 0 0 0 10 20 Hz 50 100 200 500 1000 2000 5000 10000 20000 40000 D A 8 C l1n P 1124 Muhiply Frequency Scole by Zorol _ _ Frequency Hzl 1112121121 A 8 C U 690651 Fig 3 5 Typical free field response of 4148 3 7 4 Influence of Reflections If pure tones narrow ...

Page 20: ...14 Fig 3 6 Typical directional characteristics of complete instru ment IEC Tolerances shown dotted ...

Page 21: ...0 80 70 60 50 f f f 10 20 I I l J 50 Ill II o _ I 1 nJ V 100 200 I J Jf l I 1 I I 500 1 k 2 k Fig 3 8 Typical response to vibration 3 8 USE WITH PINK NOISE TEST RECORD QR 2011 5 k 10 k 20 k Frequency Hz 169021 The Pink Noise Test Record OR 2011 contains 31 third octave bands of pink weighted random noise covering the 20Hz to 20kHz frequency range The record used in conjunc tion with Precision Soun...

Page 22: ...100Hz the output of most hi fi systems will roll off Hence it may not be possible to ob tain an adequate signal to noise ratio at least 5 dB to permit valid measurements It should also be noted that on the high frequency bands 10kHz and up stylus mistrack ing may occur resulting in the generation of noise components at lower frequencies If the loudspeaker has a significant high frequency roll off ...

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Page 24: ... Transducers Impedance Heads Accelerometer Preamplifiers Vibration Meters Accelerometer Calibrators Magnetic Transducers Capacitive Transducers Complex Modulus Apparatus Bump Recorders VIBRATION TESTING Exciter Controls Sine Exciter Controls Sine Random Exciter Equalizers Random or Shock Exciters Power Amplifiers Programmer Units s troboscopes STRAIN MEASUREMENTS Strain Gauge Apparatus Multipoint ...

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