NTi Audio M2230-WP User Manual

OPERATING MANUAL

MeasureMent Microphones

Contact NTi Audio at

Headquarters [phone] [e-mail]
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www.nti-audio.com

NTi Audio is an ISO 9001:2008
certified company.

Version 1.07 / 11. August 2014

All information is subject to change without notice.
© All rights reserved.
® Minirator is a registered trademark of NTi Audio.
™ XL2, EXEL, M2230, M2230-WP, M2211, M2215, M4260 and MA220
are trademarks of NTi Audio.

Made in

Switzerland

Table of Contents

Overview Measurement Microphones ............................4

Scope of Delivery

..........................................................5

Index

Description

Integrated Preamplifier
Electronic Data Sheet
Connecting to XL2

Outdoor Microphone M2230-WP

Introduction
Assembling
Calibration

Accessories

Further Information

My NTi Audio
Notes
Calibration Certificate
Service and Repairs
Warranty Conditions
Declaration of Conformity

Technical Data Measurement Microphones

Technical Data PreAmplifier

..........................................................................7

..................................................7

...................................................7

.........................................................8

......................................9

....................................................................9

.................................................................. 11

....................................................................14

........................................................................16

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............................................. 27

...................22

3

4

Overview

Overview Measurement Microphones

M2230 M2230-WP

Certified Class 1

measurement

microphone

in accordance with

IEC 61672.

Metal diaphragm.

Outdoor

Microphone

Outdoor measure­ment microphone.

Class 1 in accor-

dance with
IEC 61672.

Metal diaphragm.

M2211 M2215 M4260 MA220

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 measure­ment microphone
for general sound

level testing, com-

missioning and
service of audio­acoustic installa-

tions.

compatible with

1/2” pre-polarized

PreAmplifier

Microphone
preamplifier

capsules.

5

Overview

Scope of Delivery

M2230 Measurement Microphone•

M2230-WP M2230 Measurement Microphone•

consisting of

MA220 Microphone PreAmplifier

­Microphone Capsule for M2230

-

Dust Cap•
50 mm Windscreen •
Microphone-holder MH01 •
with Adapter 5/8“ - 3/8“
Operating Manual•
Individual Frequency Response Chart•

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. 3 allen screws)
Allen key

-

M2211 Measurement Microphone•

M2215 M2215 Measurement Microphone•

consisting of

MA220 Microphone PreAmplifier

­Microphone Capsule for M2211

-

Dust Cap•
33 mm Windscreen•
Microphone-holder •
with Adapter 5/8“ - 3/8“
Operating Manual•

consisting of

MA220 Microphone PreAmplifier

­Microphone Capsule for M2215

-

Dust Cap•
33 mm Windscreen•
Microphone-holder •
with Adapter 5/8“ - 3/8“
Operating Manual•

M4260 Measurement Microphone•

MA220 PreAmplifier•

Overview

33 mm Windscreen•
Microphone-holder •
with Adapter 5/8“ - 3/8“
Operating Manual•

Dust Cap•
Microphone-holder •
with Adapter 5/8“ - 3/8“
Operating Manual•

6

Description

1

2

3

Microphone Description

The plug-on measurement microphones combined with the
XL2 Analyzer form a comprehensive sound level meter and
acoustic analyzer. The microphones are 48 VDC phantom-pow­ered and include an electronic data sheet.

Integrated Preamplifier

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.

Electronic Data Sheet

The microphones include an electronic data sheet. The Auto­mated Sensor Detection (ASD) of the XL2 Analyzer automati­cally reads this data, i.e. the microphone model and calibration
data. This promotes faster setup and ensures accurate mea­surements.

Screen connection used for

ASD technology

XLR M
Pin 2 +
Pin 3 ­Pin 1 Shield

Connection diagram of measurement microphones

2

3

1

with electronic data sheet

Microphone

2
3
1

ASD

Microphone
Capsule

7

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.•

 The XL2 reads the electronic data sheet of the connected

microphone during a brief initialization process prior to the
first measurement.

Microphone Connection via the ASD Cable

The NTi Audio measurement microphones can be connected
with an ASD Cable to the XL2 Analyzer for measurements at
remote locations or for reducing acoustic reflections. The elec­tronic data sheet is transmitted via the XLR connector’s hous­ing. Do not touch this during the brief initialization period to
ensure the complete data sheet is recognized by the XL2. The
automated sensor detection does not disturb any measure­ments. You may join up to 4x ASD Cables together in series.
The ASD technology supports accurate data communication up
to a combined cable length of 20 meters (= 65 feet).

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.

Alternatively connect the microphone first directly to the Ana­lyzer. The XL2 reads the sensitivity and remembers this value.
Afterwards connect the audio cable.

8

Outdoor Microphone M2230-WP

Outdoor Microphone

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
IEC 61672 class 1 as well as the ANSI S1.4 type 1 require­ments for vertical sound incidence. For compliance with hori­zontal sound incidence a frequency compensation is employed
in the associated XL2 Sound Level Meter.

The M2230-WP consists of an M2230 measurement micro­phone enclosed in a WP30 weather protection kit.

Inside:
Protection
Cage with
water-repellent
membrane

Inside:
M2230
Measurement
Microphone

Bird Spike

90 mm
Wind Screen

Upper Body
Tube

Lower Body
Tube

Footer Plate with
tripod mounting
thread

9

10

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
requirements of IEC 61672 class 1 and ANSI
S1.4 type 1.
Deactivate the filter only if you are measur-•
ing a vertical sound incidence (sound source
from above e.g. airplane noise) with the
M2230-WP.

Do not use the M2230-WP in a horizontal po­sition. Raindrops may reach and damage the
M2230 measurement microphone.

11

Outdoor Microphone

Assembling

This chapter describes how to assemble the M2230 Measure­ment Microphone into the WP30 weather protection kit:

Install ASD Cable

Feed the female XLR of the ASD Cable through the bottom •
of the lower body tube.
Attach the footer plate to the lower body tube using the three •
allen screws, feeding the cable through the side slot of the
footer plate.

Insert M2230 Measurement Microphone

Connect the M2230 measurement microphone to the fe-•
male 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).

Fixing Screw Hole

Lower screw
of M2230
measurement
microphone

12

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.
Again verify that the bottom end of the inserted M2230 mi-•
crophone is in line with the bottom end of the upper body
tube.

In Line

Assemble the Weather Protection Body

Retract the ASD cable through the lower body tube and •
screw the lower body tube to the upper tube, ensuring that
the cable does not twist during this operation.

13

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.

 You have successfully assembled the M2230-WP Outdoor

Measurement Microphone.

14

Outdoor Microphone

Calibration

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. 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.

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.

Gently remove the top section. •

Pull

Push

15

Outdoor Microphone

Calibrate the microphone as described in the XL2 user man-•
ual using the NTi Audio Precision Calibrator.

Snap the top section back into position on the body tube.•

 You have successfully calibrated the M2230-WP Outdoor

Measurement Microphone.

16

Accessories

Calibration

Certificate

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

Compliant with IEC 61672 Class 1 and •
ANSI S1.4 Type 1 for vertical and hori­zontal sound incidence
Protection from rain and dust (IP54), •
wind and perching birds
Built from corrosion-free materials•
Removable top section for easy micro-•
phone calibration
Standard 3/8” tripod mount•
Weight: 270 g (9.5 oz.) •
Optional sturdy outdoor carrying case •
available

Precision Calibrator 94/114 dB, Class 1

The precision calibrator is used to ensure
accurate sound level measurements. It
generates 94 or 114 dBSPL reference
tones @ 1kHz for calibration of 1/2” and
1/4” measurement microphones.
NTi Audio #: 600 000 390

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.
NTi Audio # 600 000 018

NTi Audio # 600 040 060

17

Accessories

ASD Cable

The ASD Cable allows for extended con­nections of the NTi Audio measurement
microphones. It supports the transfer of
the electronic data sheet from the micro­phone to the XL2 Analyzer. You may chain
up to 4x ASD Cables together in tandem.
Length = 5 meter (16 feet)
NTi Audio #: 600 000 336

STARQUAD cable

with low capacitive load

1 1

2 2

3 3

ASD

Housing Housing

do not connect

Capacity between ASD line to shield total < 2.7nF

18

Further Information

Further Information

My NTi Audio

Register your instruments at My NTi Audio and benefit from
the following possibilities:

Free updates for your instruments•
Activation of optional product functions •
Premium access to downloads•
Receive application and product news •
Faster worldwide support •
Tracing support in case of loss or theft•
Calibration support•

How to Register

Open the web page “http://my.nti-audio.com”.•
You are prompted to login or create your My NTi Audio •
account.
The web page “My NTi Audio Products” opens.•
Select the product type and enter the serial number.•
Confirm with “Register”.•
Now your product is listed in the table “My Products“.•

 Congratulations, your NTi Audio product is registered.

19

Further Information

Notes

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.

Calibration Certificate

The NTi Audio measurement microphones have been carefully
tested during production and corresponds to the specifications
listed in “Technical Data”. Calibration certificates for new prod­ucts are optional.

NTi Audio recommends annual calibration of the products af­ter the purchase. The calibration provides documented and
traceable measurement accuracy and confirms that your NTi
Audio product meets or exceeds the published specifica­tions. The calibration and adjustment procedures follow the
documentation and traceability requirements of the standard
EN ISO / IEC 17025.

For calibrations kindly follow the service guidelines at
www.nti-audio.com/service.

Service and Repairs

If your product is not functioning correctly or is damaged,
please contact the local NTi Audio partner for assistance. If
the product needs to be returned for service, kindly follow the
service guidelines at www.nti-audio.com/service.

20

Further Information

Warranty Conditions

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.

Limitations

These guarantee provisions do not cover damage caused by ac­cidents, transportation, incorrect use, carelessness, non-origi­nal accessories, the loss of parts, operation with non-specified
input voltages, adapter types or incorrectly inserted batteries.
NTi Audio accepts no responsibility for subsequent damage of
any kind. The warranty will be voided by carrying out repairs
or services by third parties who are not part of an approved
NTi Audio Service Centre.

Statutory Rights

Consumers may have legal (statutory) rights under applicable
national laws relating to the sale of consumer products. This
warranty does not affect your statutory rights. You may assert
any legal rights you have at your sole discretion.

Declaration of Conformity

CE / FCC Compliance Statement

We, the manufacturer
NTi Audio AG
Im alten Riet 102, 9494 Schaan
Liechtenstein, Europe

do hereby declare that the measurement microphones M2230,
M2211, M2215, M4260, the preamplifier MA220 and acces­sories, comply with the following standards or other standard
documents:

EMC: 89/336, 92/31, 93/68 •
Harmonized standards: EN 61326-1•
Explosive atmospheres (ATEX): 94/9/EG•

This declaration will become invalid if modifications to the
instrument are carried out without the written approval of
NTi Audio.

Date: 1. February 2013
Signature:

Position: Technical Director

21

Further Information

Information for Disposal and Recycling

Dispose of the instrument in accordance with
the legal environmental regulations in the

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.

Other countries outside the EU

Contact the respective authorities for the valid environmental
regulations in the country.

country.

22

Specifications

Technical Data Measurement Microphones

M2230

Class 1 Certified

Microphone Type Omnidirectional, pre-polarized condenser,

Classification according
IEC 61672 and ANSI S1.4

Capsule / Transducer 1/2” detachable with 60UNS2 thread,

PreAmplifier Type MA220 -

Flatness tolerance bands
typical

Frequency Range 5 Hz - 20 kHz

Residual Noise Floor typical 16 dB(A) 21 dB(A) 25 dB(A) 29 dB(A)

Maximum SPL
@ THD 3%, 1 kHz

Sensitivity typical @ 1 kHz -27.5 dBV/Pa ±2 dB

Temperature Coefficient < -0.01 dB / °C < ±0.015 dB / °C < ±0.02 dB / °C

Class 1 / Type 1

Certified

139 dBSPL 144 dBSPL 153 dBSPL 144 dBSPL

(42 mV/Pa)

M2230-WP

Class 1

Outdoor

Microphone

(M2230+WP30)

Class 1 / Type 1 Frequency Response

type WS2F according IEC 61094-4

±1 dB @ 5 Hz - 20 Hz

±1 dB @ >20 Hz - 4 kHz

±1.5 dB @ >4 kHz - 10 kHz

±2 dB @ >10 kHz - 16 kHz

±3 dB @ >16 kHz - 20 kHz

M2211

Frequency

Response

Class 1

free field microphone

Class 1 / Type 1

-34 dBV/Pa ±3 dB
(20 mV/Pa)

M2215

High SPL

Frequency

Response

Class 1

-42 dBV/Pa ±3 dB
(8 mV/Pa)

M4260

Class 2

Class 2 / Type 2

1/4” permanently installed

+1/-4.5 dB @ 5 Hz - 20 Hz
±1.5 dB @ >20 Hz - 4 kHz

±3 dB @ >4 kHz - 10 kHz

±4.5 dB @ >10 kHz - 16 kHz

±5 dB @ >16 kHz - 20 kHz

-31.7 dBV/Pa ±3 dB
(26 mV/Pa)

23

Specifications

M2230

Class 1 Certified

Temperature Range -10°C to +50°C

Pressure Coefficient -0.005 dB / kPa -0.02 dB / kPa -0.04 dB / kPa

Influence of Humidity
(non-condensing)

Humidity 5% to 90% RH, non-condensing

Long Term Stability > 250 years / dB -

Electronic Data Sheet NTi Audio ASD in accordance with IEEE P1451.4 V1.0, Class 2, Template 27

Output Impedance 100 Ohm balanced

Power Supply 48 VDC phantom power, 3 mA typical

Connector Balanced 3-pole XLR

Diameter Dimensions 20.5 mm (0.8”) 36 mm (1.4”) 20.5 mm (0.8”)

Length Dimensions 154 mm (6.1”) 378 mm (14.9”) 150 mm (5.9”)

Weight 100 g, 3.53 oz 430 g, 15.17 oz 100 g, 3.53 oz 83 g, 2.93 oz

Environmental protection IP51 IP54 in vertical

NTi Audio # 600 040 050 600 040 055 600 040 022 600 040 045 600 040 025

M2230-WP

Class 1

Outdoor

Microphone

(M2230+WP30)

(14°F to 122°F)

< ±0.05 dB < ±0.4 dB

position

M2211

Frequency

Response

Class 1

M2215

High SPL

Frequency

Response

Class 1

IP51

M4260

Class 2

0°C to +40°C

(32°F to 104°F)

24

Specifications

Typical Frequency Response of Measurement Microphones

8

Tolerance

6

4

2

0

-2

Sensitivity relative [dB]

-4

-6

Class 1, IEC61672-1

Tolerance

Class 2, IEC61672-1

M4260

M2230, M2211,
M2210, M2215

-8

5 10 20 100 1000 10000 20000

(free field conditions @ reference direction 0°)

log frequency [Hz]

25

Specifications

Free Field - Pressure Field

Correction Factors

Nominal

Frequency

[Hz]

50
63
80

100

125
160

200

250
315

400
500
630

800
1000
1250

1600

2000

2500

3150

4000
5000

6300

8000

10000

12500

16000

20000

M2230

Microphone

[dB]

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.8

1.0

1.5

2.2

3.3

4.6

6.5

8.0

9.0

M2211

Microphone

[dB]

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.1

0.1

0.1

0.1

0.3

0.5

0.6

0.7

1.1

1.7

2.2

3.3

4.2

5.4

7.3

9.2

11.0

M2215

Microphone

[dB]

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.1

0.2

0.6

0.7

1.2

2.1

3.0

3.9

3.7

6.7

9.0

10.6

26

Specifications

Diffuse Field Correction Factors

Nominal

Frequency

[Hz]

50
63
80

100

125
160

200

250
315

400
500
630

800
1000
1250

1600

2000
2500

3150

4000
5000

6300

8000

10000

12500

16000

20000

M2230

Microphone

[dB]

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.1

0.1

0.1

0.2

0.4

0.5

0.5

1.1

1.7

1.9

2.6

3.3

4.8

6.1

8.9

27

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 ±0.2 dB

Phase Linearity < 1° @ 20 Hz - 20 kHz

Maximum Output Voltage

Electronic Data Sheet Containing user calibration data

Impedance Input: 20 GOhm // 0.26 pF, Output: 100 Ohm balanced

Power Supply 48 VDC phantom power, 3 mA typical

Attenuation < 0.17 dB (Rphantom 2x 6.8 kOhm)

Connector Balanced 3-pole XLR

Thread for Capsule 60 UNS2

Weight 90 g, 3.17 oz

Dimensions Length 142.5 mm (5.6”), diameter 20.5 mm (0.8”)

Temperature Range -10°C to +50°C (14°F to 122°F)

Humidity 5% to 90% RH, non-condensing

NTi Audio # 600 040 040

1.6 mV(A) at C_in 18pF ≙ 12 dBA @ 20 mV/Pa

21 Vpp ≙ 7.4 Vrms ≙ 145 dBSPL @ 20 mV/Pa, THD 3%, 1 kHz

•
Default factory sensitivity = 4.9 V/Pa •
Read/write by XL2 Audio and Acoustic Analyzer •
NTi Audio ASD in accordance with IEEE P1451.4 V1.0, Class 2, Template 27 •

The product specifications may vary based on the mounted microphone capsule type.

dth 500 - 04.14