G.R.A.S. 43BA Series Instruction Manual Download Page 1

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LI0105 – 11 December 2013

TENT

TIVE 10 Decemb

Instruction Manual

43BA ¼” 0.4cc High-frequency Coupler Kit

43BA-1 ¼” 0.4cc High-frequency Coupler Kit
43BA-2 ¼” 0.4cc CCP High-frequency Coupler Kit
43BA-3 ¼” 0.4cc CCP High-frequency Coupler Kit, High Sensitivity

Summary of Contents for 43BA Series

Page 1: ... 11 December 2013 Instruction Manual 43BA 0 4cc High frequency Coupler Kit 43BA 1 0 4cc High frequency Coupler Kit 43BA 2 0 4cc CCP High frequency Coupler Kit 43BA 3 0 4cc CCP High frequency Coupler Kit High Sensitivity ...

Page 2: ...come at gras gras dk Revision Date Description 1 11 December 2013 First publication Copyright Notice 2013 G R A S Sound Vibration A S www gras dk Trademarks Product names mentioned in this document may be trademarks or registered trademarks of their respective companies and are hereby acknowledged ...

Page 3: ...nd Description 4 Design 4 Performance 5 Delivered Items 7 Assembling the Coupler 9 Mounting and Dismounting the Microphone 10 Calibration 10 Ordering Information 11 Specifications and Warranty 13 Specifications 13 Calibration 14 Service and Repairs 14 ...

Page 4: ...ons Design The coupler housing is dimensioned to accomodate the ear mould and tube adapters normally used with the 2cc coupler but the inner volume is only 0 4cc Its 0 4cc volume is a well defined cylinder where the diaphragm of the microphone is flush with the bottom of the cylinder The cylinder is machined to within 2 of the nominal 0 4cc volume The exact volume of each individual coupler is sta...

Page 5: ...with the 0 4cc coupler and a microphone with a sensitivity of about 1 5mV Pa is almost as good as that of a 2cc coupler using a microphone with a sensitivity of 12 5mV Pa The 43BA 1 has a sensitivity of 1 5 mV Pa and the noise floor is 39dB A the 43BA 2 has a sensitivity of 1 45 mV and the noise floor 44dB A When used with a high sensitivity microphone 18 mV Pa the 0 4cc is very close to the 2cc c...

Page 6: ... more linear and does therefore not degrade the reproducibility of high frequency measurements A typical receiver response is shown in Fig 2 60 70 80 90 100 110 120 130 140 150 100 1000 10000 Magnitude dB re 20uPa Frequency Hz Typical receiver response with 9mm Ø1 4 tubing 1 12 oktave frequency response 04CC Typical Receiver Response with 9mm Standard Tubing Fig 2 Typical receiver response with 9 ...

Page 7: ...re Microphone 40BD CCP Preamplifier with Microdot Connector Very Short 26CS 0 4cc Coupler RA0252 Tube Adapter Large RA0271 Ear mould Adapter RA0270 In ear Adapter RA0272 3 m Cable Microdot BNC AA0070 GR0924 RA0045 46BP GR1153 40AG GS0158 GR0010 46BD 1 2 4 3 5 L B 2 0 20 10 0 10 20 J GR0917 GR0924 GR1440B RA0045 26AS 46BP GR1153 40AG GS0158 GR0010 46BD GR0917 GR0924 GR1440B RA0045 26AS 46BP GR1153 ...

Page 8: ...pter Large RA0271 Ear mould Adapter RA0270 In ear Adapter RA0272 3 m Cable Microdot BNC AA0070 G R A S 0 4cc Coupler Non configured 0 4cc Coupler RA0252 A A 1 1 A A MicroDot Stik LEMO to LEMO BNC to BNC Power Supply MicroDot Stik LEMO to LEMO BNC to BNC Power Supply GR0917 GR0924 GR1440B RA0045 26AS 46BP GR1153 40AG GS0158 GR0010 46BD RA0045 46BP GR1153 40AG GS0158 GR0010 46BD GR0924 RA0045 46BP G...

Page 9: ...hout adapter B B 5 1 B B In ear Adapter RA0272 Microphone 40BP 40BD 40BL Fig 4 43BA mounted with microphone and RA0272 In ear Adapter Union Nut RA0271 Tube Adapter large microphone 40BP 40BD 40BL Fig 5 43BA mounted with microphone and RA0271 Tube Adapter B B Union Nut Microphone 40BP 40BD 40BL Tube Adapter small RA0270 Ear mould Adapter Union Nut Fig 6 43BA mounted with microphone and the RA0270 E...

Page 10: ...nism lever to its forward position See Fig 7 Push to unlock Engraving indicating the locked position Push to lock Fig 7 Locking and unlocking the microphone Calibration You must remove the microphone preamplifier when you need to calibrate it Proceed as follows 1 Unlock the locking mechanism by pushing it as shown in Fig 7 2 Gently pull out the microphone set For proper sensitivity calibration 114...

Page 11: ...ated Cable Very Short 26AS Ear mould Adapter Kit for RA0038 RA0252 Couplers RA0270 In ear Adapter for RA0038 RA0252 Couplers RA0272 Tube Adapter for RA0038 RA0252 Couplers RA0271 G R A S 43BA 2 CCP 0 4cc High frequency Coupler Kit Included Items Part Number 0 4cc Coupler including Union Nut RA0252 Prepolarized Pressure Microphone 40BD CCP Preamplifier Very Short 26CS Ear mould Adapter Kit for RA00...

Page 12: ... 40BL CCP Preamplifier Very Short 26CS Ear mould Adapter Kit for RA0038 RA0252 Couplers RA0270 In ear Adapter for RA0038 RA0252 Couplers RA0272 Tube Adapter for RA0038 RA0252 Couplers RA0271 3 m Cable Microdot BNC AA0070 Optional Accessories Part Number 7 pin LEMO LEMO 3 m AA0008 BNC BNC 3 m AA0035 For calibration Pistonphone with built in barometer and thermometer 114 dB at 250 Hz 42AP Pistonphon...

Page 13: ... Connector LEMO 43BA 2 Microphone Set 40BD 26CS Set sensitivity mv Pa 1 45 dB re 1 V Pa 57 Resonance frequency 30 kHz Theoretical dynamic range with 40BD 26CS 44 dB A to 168 dB Temperature range C 30 to 60 Temperature coefficient 250Hz C dB 0 01 Humidity range RH non condensing 0 to 95 Connector Microdot 10 32 BNC 43BA 3 Microphone Set 40BL 26CS Set sensitivity mv Pa 18 dB re 1 V Pa 35 Resonance f...

Page 14: ...arranty Damaged diaphragms in microphones can be replaced The warranty does not cover products that are damaged due to negligent use an incorrect power supply or an incorrect connection to the equipment The warranty for cables is 6 months Service and Repairs All repairs are made at G R A S International Support Center located in Denmark Our Support Center is equipped with the newest test equipment...

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