NTI M2230, M2211, M2215, M4261, MA220 Operating Manual

OPERATING MANUAL

MEASUREMENT MICROPHONES

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www.nti-audio.com

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

is an ISO 9001:2015 certified company.

Version April 2021

All information is subject to change without notice.
© All rights reserved.
® Minirator is a registered trademark of NTi Audio.
™ XL2, XL2-TA, EXEL, M2230, M2211, M2215, M4261, MA220 M2230-WP, M4261-WP,
WP30 and WP61 are trademarks of NTi Audio.

Made in

Switzerland

Table of Contents

Overview ............................................................................4

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

Outdoor Measurement Microphones ............................ 5

Scope of Delivery ..........................................................6

Description ..........................................................................8

Integrated Preamplifier ..................................................8

Electronic Data Sheet ................................................... 8

Connecting to XL2 .........................................................9

Capsule Replacement Instruction ................................ 10

Outdoor Microphones ......................................................12

Assembling .................................................................. 14

Calibration .................................................................... 16

Disassembling the Top Section .................................... 18

Accessories ........................................................................19

Further Information .......................................................... 22

My NTi Audio ...............................................................22

Notes ...........................................................................23

Calibration Certificate ...................................................23

Service and Repairs ..................................................... 23

Warranty Conditions ....................................................24

Declaration of Conformity ............................................ 24

Index

Technical Data Measurement Microphones ...................26

Technical Data PreAmplifier .............................................34

3

Overview

Measurement Microphones

M2230 M2211 M2215 M4261 MA220

Overview

PreAmplifier

Certified Class 1

measurement

microphone

in accordance with

IEC 61672,

metal diaphragm

4

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 mi-

crophone for general

sound level testing,
commissioning and

service of audio-

acoustic installations

Microphone
preamplifier

compatible with

1/2” pre-polarized

capsules

Outdoor Measurement Microphones

Overview

M2230-WP

Outdoor Microphone

Outdoor measurement microphone,

class 1 in accordance with IEC 61672

consists of

M2230 Measurement Microphone

+ WP30 Weather Protection

M4261-WP

Outdoor Microphone

Outdoor measurement microphone,

class 2 in accordance with IEC 61672

consists of

M4261 Measurement Microphone

+ WP61 Weather Protection

5

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

M2211 • Measurement Microphone

consisting of

- Microphone PreAmplifier MA220

- Microphone Capsule 7052

• Dust Cap

• 33 mm Windscreen

• Microphone-holder
with Adapter 5/8“ - 3/8“

• Operating Manual

Overview

M2215 • M2215 Measurement Microphone

consisting of

- Microphone PreAmplifier MA220

- Microphone Capsule 7056

• Dust Cap

• 33 mm Windscreen

• Microphone-holder
with Adapter 5/8“ - 3/8“

• Operating Manual

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

6

WP30 • WP30 Weather Protection for M2230

- 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

WP61 • WP61 Weather Protection for M4261

- 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

Overview

7

Microphone Description

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

2

2

3

3

1

1

Connection diagram of measurement microphones

with electronic data sheet

Microphone

2
3
1

ASD

Microphone
Capsule

8

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 5- or 10-meter 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.

9

Microphone Description

Capsule Replacement Instruction

The microphones for the XL2 Analyzer 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. In case of a capsule replace­ment, the electronic data sheet needs to be updated with the
data of the new capsule.

Step-by-Step-Instruction

• Install the new capsule on the microphone preamplifier.

• Plug the measurement microphone directly into the XL2.

• Install the latest firmware in the XL2, available at
https://my.nti-audio.com/support/xl2.

• Start the XL2 Projector PRO Software. The computer re­quires online connection to the web.

• Connect the XL2 with the USB cable to the Projector PRO
software, thus you see the XL2 display live on the computer
monitor. (if prompted select COM-Port on the XL2)

• Press the computer keyboard keys “Ctrl + Shift + F5” at the
same time (alternatively “Ctrl + Alt + F5”)

10

• Select Original NTi Audio Microphone or Custom micro-
phone.

• Case: Original NTi Audio Microphone

- Enter the serial number of the new capsule

- Confirm by clicking Write to MA220.

- Now XL2 reads the factory sensitivity of the new capsule
from the NTi Audio server and stores the new data into
the electronic data sheet of the preamplifier. You will be
prompted if all is in good order.

• Case: Custom microphone

- Enter the microphone sensitivity

- Confirm by clicking Write to MA220.

- Now XL2 stores the microphone sensitivity as factory sen­sitivity in the electronic data sheet of the MA220 PreAm­plifier.

• Verify the setting in the “CALIBRATE” screen of the XL2 and
perform a user calibration to verify if the new capsule works
in good order.

Microphone Description

11