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MK 250
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The 1/2” measuring microphone capsule MK 250 is designed for acoustical measurements in research and development and also for industrial use. Some applications include audiometry, the measurement of building acoustics and noise levels.
The microphone capsule has a fixed layer of backelectret to supply the polarisation voltage.lt is designed and very carefully constructed to ensure excellent long-time stability of the electroacoustical parameters. All essential components including the diaphragm are made of nickel and the diaphragm is bonded by a special galvanic process. The rear electrode, holder of the backelectret, is insulated from the capsule housing by a quartz glass plate. The diaphragm is protected against mechanical damage by a protection grid in which an insulated calibration grid is integrated. |
Maintenance and Upkeep |
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In order to maintain its functioning the measurement microphone capsule should be protected against mechanical damage. It should be disconnected from its power source and completely checked for any pollution in regular intervals that have to be defined depending on the operating conditions. After removal of the protection grid the pollution within the grid and on the diaphragm should be cleaned very carefully with a soft clean cloth or brush. The measurement microphone capsule is not suitable for use in chemical aggressive conditions and in conductible dust. Condensation must be avoided. |
