Measurement Microphone MM 203
The 1/2 ”measuring microphone MM 203 opens up the possibility of using a high quality, externally polarized measuring microphone capsule MK 221 on measuring systems with 7-pin. LEMO connection to be used.
The electrical connection is made via a permanently connected, two-meter-long cable including a 7-pin LEMO connector. The preamplifier is equipped with a heating resistor that prevents possible condensation under extreme climatic conditions.
We recommend the MH 64 microphone holder with a 1/2 ”clamp to hold the microphone. The use of the 1/2 ”measuring microphone capsule accessories such as windshield, nose cone, dry adapter etc. is possible without any problems.
The measurement microphone can be calibrated with the Pistonfon Type 5002 or with other suitable sound pressure calibrators.
|Converter type||Capacitive pressure receiver, according to WS2F (DIN EN IEC 61094-4)|
|Operating transfer coefficient||50 mV / Pa|
|Operational transmission rate||-26 dB ± 1.5 dB re 1V / Pa|
|Free field correction for 1 kHz||0 dB|
|Diffuse field correction for 1 kHz||0 dB|
|Reference direction||Microphone axis|
|Frequency range of the free field transmission factor||3.5 Hz … 20 kHz, class 1 DIN EN 60 651|
|Polarization voltage||200 V|
|Limit sound pressure level for 3% harmonic distortion at 1 kHz||146 dB|
|Nominal terminating impedance||100 kOhm|
|Memory for microphone identification||–|
|Equivalent noise level DIN EN 60651||15 dBA|
|Magnetic field influence 80 A / m, 50 Hz||<22 dB|
|Influence of mechanical vibrations 1 m / s²||60 dB (20 Hz to 1 kHz)|
|Working temperature range ˂ ± 0.5 dB||-25 ° C to +100 ° C|
|Temperature coefficient||≤ 0.01 dB / K|
|Static pressure coefficient||1×10-5 dB / Pa|
|Temperature limits||-50 ° C to +100 ° C|
|Moisture limits||rH <100%, condensation not allowed|
|diameter||with protective cap||13.2 + 0.05 mm|
|without protective cap||12.7 + 0.05 mm|
|Thread for preamplifier||11.7mm 60 US|
|Thread for protective cap||12.7mm 60 US|