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Measurement Microphone MM 215

Measurement Microphone MM 215

Description

The 1/2 ”measuring microphone MM 215 opens up the possibility of using high quality, pre-polarized measuring microphone capsule MK 255 on measuring systems with IEPE supply. Array arrangements and envelope surface measurement methods, for example in motor vehicle acoustics, come into consideration as typical applications.

The electrical connection is made via the permanently attached BNC connector with standard BNC cables. The preamplifier is equipped with a built-in memory for microphone identification, with which microphone data can be written and read by the manufacturer/user (IEEE P1451.4 TEDS editor).

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.

Transducer type Capacitive pressure transducer, acc. WS2F (DIN EN IEC 61094-4)
Sensitivity 50 mV/Pa
Sensitivity -26 dB ±1,5 dB re 1V/Pa
Correction free-field at 1 kHz 0 dB
Random incidence at 1 kHz 0 dB
Principal axis microphone axis
3,5 Hz to 20 kHz
Polarization voltage 0 V
Max. SPL for 3% THD at 1 kHz 135 dB
Max. SPL 130 dB
Output voltage ≤ 6,5 Veff
Output impedance < 100 Ohm
Nom. load impedance 100 kOhm
Current consumption 2 mA to 10 mA, nom. 4 mA
Transducer excitation voltage UL 24 V DC to 30 V DC
Time for power up 1 min.
Equivalent loudness level DIN EN 60651 15 dBA
Influence of magnetic field 80 A/m, 50 Hz < 22 dB
Influence of vibration 1 m/s² 60 dB (20 Hz bis 1 kHz)
Operating temperature range ˂± 0,5 dB -25 °C to +100 °C
Main ambient temperature coefficient ≤ 0,01 dB/K
Main ambient pressure coefficient 1×10-5 dB/Pa
Temperature limits -50 °C to +100 °C
Humidity limits r.H. < 100%, absence of condensation
Diameter with protection grid 13,2 + 0,05 mm
without protection grid 12,7 + 0,05 mm
Length 97 mm (incl. connector)
Weight 45 g
Preamplifier thread 11,7 mm 60 UNS
Protection grid thread 12,7 mm 60 UNS
Plug BNC
Microphone identification memory 256-Bit 1-WireTM EEPROM (DS 2430 AP)

Datasheet download