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G.R.A.S. 67AX Instruction Manual

1/2 inch ccp ground array microphone system
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Instruction Manual
67AX ½" CCP Ground Array Microphone System
www.gras.dk
LI0055 – Revision 25 June 2012

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Summary of Contents for G.R.A.S. 67AX

  • Page 1 Instruction Manual 67AX ½” CCP Ground Array Microphone System www.gras.dk LI0055 – Revision 25 June 2012...
  • Page 2 Revision History Any feedback or questions about this document are welcome at gras@gras.dk. Revision Date Description 27 May 2011 First publication 25 June 2012 Added calibration and verification information. Copyright Notice © 2011-2012 G.R.A.S. Sound & Vibration A/S http://www.gras.dk Any technical documentation that is made available by G.R.A.S. is the copyrighted work of G.R.A.S.

  • Page 3: Table Of Contents

    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 ..................

  • Page 4: Introduction

    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. Fig. 1. An illustration of how to connect the Microdot-to-Microdot adapter on the microphone to the angled Microdot adapter on the 3 m cable.
  • Page 5 5. Fasten the safety clip over the cable with 2 screws. These steps are shown in Fig. 2. (× 8) Fig. 2. A view of the order for assembling the parts of the 67AX. LI0055 – Revision 25 June 2012...

  • Page 6: Calibration And Verification

    250 Hz pistonphone can be used for both calibration and daily verifications. Calibrating the microphone To calibrate the microphone in the 67AX, remove it from the mounting plate. 1. Set the pistonphone in an upright position, preferably using a calibration stand for stability.

  • Page 7: Technical Specifications

    Technical Specifications Dimensions and Data for 67AX Dimensions Microphone Ø13.2 mm Housing Ø18.0 mm Microphone set height Without grid 8 mm With 9.20 mm Weight 15 g Mounting Plate Ø400 mm Data was collected in a temperature of 23 °C (±3 °C) and in a relative humidity of 60 % ±20 %.

  • Page 8: Ordering Information

    Ø400 mm mounting plate with assembly parts and cable, and windscreen) Manual LI0055 Accessories The following accessories are needed for the 67AX, but they are not included in the basic package. They must be ordered separately. Accessory Part Number Pistonphone field-verification adapter...

  • Page 9: Service And Repairs

    Damaged diaphragms in microphones can be replaced. The warranty does not cover products that are damaged due to negligent use, an incor- rect power supply, or an incorrect connection to the equipment. 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 and staffed with dedicated and highly skilled engineers.

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