OPERATING MANUAL Measurement Microphones
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Index Table of Contents Overview Measurement Microphones .............................4 Scope of Delivery...........................................................5 Description...........................................................................7 Integrated Preamplifier...................................................7 Electronic Data Sheet ....................................................7 Connecting to XL2..........................................................8 Outdoor Microphone M2230-WP.
Overview Overview Measurement Microphones 4 M2230 M2230-WP Outdoor Microphone M2211 M2215 M4261 MA220 PreAmplifier Certified Class 1 measurement microphone in accordance with IEC 61672, metal diaphragm Outdoor measurement microphone, class 1 in accordance with IEC 61672, metal diaphragm General purpose measurement microphone class 1 frequency response, metal diaphragm Measurement microphone for high sound levels (up to 153 dB), class 1 frequency response, metal diaphragm Cost-effective class 2
Overview Scope of Delivery M2230 • Measurement Microphone consisting of -- MA220 Microphone PreAmplifier -- Microphone Capsule MC230 or MC230A • Dust Cap • 50 mm Windscreen • Microphone-holder MH01 with Adapter 5/8“ - 3/8“ • Operating Manual • Individual Frequency Response Chart M2230-WP • M2230 Measurement Microphone • WP30 Weather Protection -- Bird spike -- 90mm Wind screen -- Protection cage -- Upper body tube with allen key mount -- Lower body tube -- Footer plate with tripod mounting thread (incl
Overview 6 M4261 • Measurement Microphone • 33 mm Windscreen • Microphone-holder with Adapter 5/8“ - 3/8“ • Operating Manual MA220 • PreAmplifier • Dust Cap • Microphone-holder with Adapter 5/8“ - 3/8“ • Operating Manual
Microphone Description Description Screen connection used for ASD technology 2 2 3 3 XLR M Pin 2 + Pin 3 Pin 1 Shield 1 1 The microphone bodies contain a preamplifier and require 48 VDC phantom power supply for operation. They combine high dynamic range and wide frequency range with low noise. The measurement microphones can also be connected with an ASD Cable to the XL2 Audio and Acoustic Analyzer for measurements at remote locations or for reduction of acoustic reflections.
Microphone Description Connecting to XL2 Microphone plugs directly into the XL2 The XL2 automatically reads the electronic data sheet of the connected microphone as follows: • Connect the measurement microphone to the XL2. • Switch on the XL2. Microphone Connection via a professional Audio Cable For distances longer than 20 meter (= 65 feet) use a high quality, low capacitance standard professional audio cable. The microphone sensitivity has to be entered manually into the XL2 Analyzer.
Outdoor Microphone Outdoor Microphone M2230-WP Introduction The M2230-WP is a weather-protected microphone solution for the XL2 Sound Level Meter allowing acquisition of environmental noise data in outdoor applications. The corrosion-free polymer housing, wind screen, water-repellent membrane and bird spike provide excellent protection from rain, wind, dust and perching birds. The frequency response of the M2230-WP fulfills the class 1 requirements of IEC 61672 and ANSI S1.4 for vertical sound incidence.
Outdoor Microphone • Always activate the frequency correction filter in the XL2 when measuring a horizontal sound incidence (sound source from the side) with the M2230-WP. The filter ensures that the measurements accuracy meets the class 1 requirements of IEC 61672 and ANSI S1.4. • Deactivate the filter only if you are measuring a vertical sound incidence (sound source from above e.g. airplane noise). • The outdoor windscreen is recommended to be replaced annually.
Outdoor Microphone Insert M2230 Measurement Microphone • Connect the M2230 measurement microphone to the female XLR of the ASD Cable. • Insert the M2230 measurement microphone into the upper body tube so that the bottom end of the microphone is in line with the bottom end of the upper body tube. Align the fixing screw hole of the upper body tube with the lower screw of the M2230 measurement microphone (remove the fixing screw to see the lower screw head through the fixing screw hole).
Outdoor Microphone Attach the M2230 to the Upper Body Tube Attaching the fixing screw of the upper body tube onto the lower screw of the M2230 measurement microphone ensures that the microphone housing is not scratched. • Insert and gently tighten the fixing screw while jiggling the microphone. You will feel the fixing screw center in the head of the lower screw of the microphone. Do not over tighten the fixing screw.
Outdoor Microphone Mount the Top Section • The top section of the WP30 weather protection kit consists of the wind screen, the enclosed protection cage with waterrepellent membrane and the bird spike. Gently slide the top section over the microphone tip and on to the upper body tube. You will feel a slight increase in resistance approximately 3 mm before the top section’s final position. Slightly increase the pressure until the top section snaps into the final position with an audible click.
Outdoor Microphone Calibration • Calibrate the microphone as described in the XL2 user manual using the NTi Audio Precision Calibrator. The design of the M2230-WP Outdoor Measurement Microphone supports easy calibration of the microphone. To calibrate, follow the procedure below: • The top section of the M2230-WP is snapped on to the body tube. Remove the top section of the M2230WP by gently pulling the bird spike upwards.
Outdoor Microphone The snap mechanism works only at temperatures above -15°C / 5°F (as the O-Ring stiffens). In colder conditions we suggest you warm up the housing first, e.g. with your hands.
Accessories Disassembling the Top Section The top section of the M2230-WP is snapped on to the body tube. • Remove the top section of the M2230-WP by gently pulling the bird spike upwards. At the same time gently push up on the cage inside the wind screen with two fingers of your other hand. You will feel when the snap mechanism is released. • Gently remove the top section. • Turn the top section upside down and hold it by the bird spike. • Gently unscrew the cage from the hole of the wind screen.
Accessories Accessories WP30 Weather Protection for M2230 Protect your M2230 microphone from rain, wind, dust and perching birds with this professional outdoor weather protection kit. Ideal for precise acquisition of environmental noise data in outdoor applications. Features • Class 1 compliant with IEC 61672 and ANSI S1.
Accessories Calibration Certificate Manufacturer Calibration Certificate The calibration certificate lists the individual product data with serial number. The calibration and adjustment procedures follow the documentation and traceability requirements of the EN ISO / IEC 17025 standard. Annual re-calibration of the instrument is recommended ensuring accurate measurements.
Accessories WP30 Windscreen Replacement The replacement package contains two spare windscreens for the outdoor measurement microphone M2230-WP or WP30. The outdoor windscreen is recommended to be replaced annually.
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Further Information Notes Calibration Certificate • Use the microphone for the intended purpose only. • Protect the microphone from contamination by always using the supplied windscreen. • Never use the microphone in a damp or wet environment. • Do not jar or drop the microphone. • Do not remove the microphone protective grid. • Do not touch the microphone membrane. • Remove the black dust cap of the 1/2” measurement microphones prior to use.
Further Information Warranty Conditions Declaration of Conformity International warranty NTi Audio guarantees the function of its products and the individual components for a period of one year from the date of sale. During this period, defective products will either be repaired free of charge or replaced.
Further Information Information for Disposal and Recycling Dispose of the instrument in accordance with the legal environmental regulations in the country. Regulations for the EU and other European countries with corresponding laws The instrument must not be disposed of in the household garbage. At the end of its service life, bring the instrument to a collecting point for electrical recycling in accordance with the local legal regulations.
Specifications Technical Data Measurement Microphones Consisting of M2230 Class 1 Certified M2230-WP Class 1 Outdoor Microphone (M2230+WP30) PreAmplfier MA220 + MC230 or MC230A Capsule PreAmplfier MA220 + MC230 or MC230A Capsule + WP30 Microphone Type Classification according IEC 61672 and ANSI S1.
Specifications M2230 Class 1 Certified Sensitivity typical @ 1 kHz M2230-WP Class 1 Outdoor Microphone (M2230+WP30) -27.5 dBV/Pa ±2 dB (42 mV/Pa) Temperature Coefficient -34 dBV/Pa ±3 dB (20 mV/Pa) < -0.01 dB / °C Temperature Range M4261 Class 2 -42 dBV/Pa ±3 dB (8 mV/Pa) -36 dBV/Pa ±3 dB (16 mV/Pa) < ±0.015 dB / °C -0.005 dB / kPa Influence of Humidity (non-condensing) < ±0.02 dB / °C 0°C to +40°C (32°F to 104°F) -0.02 dB / kPa -0.04 dB / kPa < ±0.05 dB Humidity < ±0.
Specifications Typical Frequency Response of Measurement Microphones M4261 M2230, M2211, M2210, M2215 8 Tolerance Class 1, IEC61672-1 6 Sensitivity relative [dB] 4 2 0 -2 -4 Tolerance Class 2, IEC61672-1 -6 -8 5 10 10 20 100 100 log frequency [Hz] 1000 1000 (free field conditions @ reference direction 0°) 26 10000 10000 20000
Specifications Free Field - Pressure Correction Factors If a measurement microphone is held in a free-field environment, then the measurement microphone acts at high frequencies like a reflector. The sound pressure increases in front of the microphone capsule membrane. M2230, M2211 and M2215 are free-field equalized measurement microphones, they compensate for the increased pressure internally. The calibrator offers no longer free-field conditions.
Specifications Diffuse Field Correction Factors A diffuse sound field is characterized by the sound arriving at the receiver from all directions with more or less equal probability. The M2230, M2211, M2215 and M4261 are free-field equalized measurement microphones. The default frequency response refers to a 0° sound incidence. The diffuse-field frequency response is calculated by averaging the directional characteristics; this results in a reduction at the high frequencies.
Specifications M2230 Frequency Response for Free Field, Diffuse Field and Pressure Idealized Free Field 11 00 sensitivity relative [dB] ‐1 -1 ‐2 -2 ‐3 -3 ‐4 -4 ‐5 -5 Diffuse Field ‐6 -6 ‐7 -7 ‐8 -8 Pressure ‐9 -9 ‐10 -10 10 10 20 100 100 1000 1000 10000 10000 20000 log frequency [Hz] 29
Specifications Spectral Correction for horizontal Sound Incidents using the Outdoor Microphone The outdoor microphone M2230-WP fulfills Class 1 requirements of IEC 61672 and ANSI S1.4 for vertical sound incidence. For compliance with horizontal sound incidence a spectral correction is employed in the associated XL2 Sound Level Meter. 30 Nominal Frequency [Hz] Spectral Correction for horizontal Sound Incidents with Firmware V4.20 or higher [dB] 1/3 Octave 1/1 Octave <800 0.0 0.0 800 1000 1250 0.
Specifications Technical Data PreAmplifier MA220 PreAmplifier Microphone PreAmplifier Compatible with 1/2” microphone capsules type WS2F in accordance with IEC61094-4 Frequency Range 4 Hz - 100 kHz Residual Noise Floor typical Frequency Response Flatness 1.6 mV(A) at C_in 18pF ≙ 12 dBA @ 20 mV/Pa Phase Linearity < 1° @ 20 Hz - 20 kHz Maximum Output Voltage Electronic Data Sheet 21 Vpp ≙ 7.4 Vrms ≙ 145 dBSPL @ 20 mV/Pa, THD 3%, 1 kHz Impedance Input: 20 GOhm // 0.
dth 1500 - 01.
