G.R.A.S. 67AX Instruction Manual Download | Manualshive

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LI0055 – Revision 25 June 2012

Instruction Manual

67AX

½”

CCP Ground Array Microphone System

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Summary of Contents for 67AX

Page 1: ...www gras dk LI0055 Revision 25 June 2012 Instruction Manual 67AX CCP Ground Array Microphone System ...

Page 2: ...technical documentation that is made available by G R A S is the copyrighted work of G R A S and is owned by G R A S The content in this document is subject to change without notice G R A S Sound Vibration A S is not liable or responsible for any errors or inaccuracies that may appear in this document Trademarks KEMAR is the trademark of G R A S Sound Vibration A S Any other product names mentione...

Page 3: ...kage 4 Assembling the 67AX System 4 Calibration and Verification 6 Calibrating the microphone 6 Verifying the microphone 6 Technical Specifications 7 Dimensions and Data for 67AX 7 Ordering Information 8 Accessories 8 Calibration 8 Warranty 8 Service and Repairs 9 ...

Page 4: ...able safety clip with 2 screws SK2008 M3 00 8 00 GR1427 Mounting plate GR1425 Windscreen for 67AX AM0375 3 m Angled Microdot to BNC cable AA0069 Manual LI0055 Assembling the 67AX System The first step to assembling the 67AX system is connecting the microphone to the cable as shown in Fig 1 To assemble the 67AX system 1 Place the small O ring in the ridge in the center hole 2 Place the assembled mi...

Page 5: ...e O ring in the ridge near the edge of the cavity The large O ring must lie on top of the cable 4 Fit the cover plate on top of the microphone and O ring assembly and fasten in place with 8 screws 5 Fasten the safety clip over the cable with 2 screws These steps are shown in Fig 2 1 2 3 4 5 8 Fig 2 A view of the order for assembling the parts of the 67AX ...

Page 6: ...and for stability 2 Mount the pistonphone calibration adapter RA0221 on the pistonphone 3 Insert the microphone into the adapter on the pistonphone Press gently to ensure that the microphone is inserted as far as it can go 4 Turn on the pistonphone and calibrate as described in the instruction manual for the pistonphone Verifying the microphone 1 Mount the field verification adapter RA0216 onto th...

Page 7: ...ency response for the set 2 0 dB 3 15 Hz 20 kHz 1 0 dB 5 Hz 12 5 kHz Nominal sensitivity for the set at 250 Hz 12 5 mV Pa Polarization voltage 0 V Dynamic range for the set Upper limit 3 distortion 146 dB re 20 μPa Thermal noise 22 dB A re 20 μPa Temperature Operation 30 C to 70 C Storage 40 C to 85 C Static pressure coefficient 250 Hz 25 C 0 008 dB kPa Humidity non condensing Range 0 100 RH Influ...

Page 8: ... as the G R A S 42AP Pistonphone Do not use them with any other calibrator or verification device The 250 Hz pistonphone can be used for both calibration and daily verifications Calibration Before leaving the factory all G R A S products are calibrated in a controlled laboratory environment using traceable calibration equipment An individual test certificate is included with each product The calib...

Page 9: ...ewest test equipment and staffed with dedicated and highly skilled engineers Upon request we make cost estimates based on fixed repair categories If a product covered by warranty is sent for service it is repaired free of charge unless the damage is the result of negligent use or other violations of the warranty All repairs are delivered with a service report as well as an updated calibration char...

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