PCB Piezotronics 378B11 Manual de usuario

Model 378B11

ICP Microphone System

Installation and Operating Manual

This manual contains the 377B11, 426E01 installation and operating manuals that

comprise a Model 378B11 ICP Microphone System kit.

For assistance with the operation of this product,

contact PCB Piezotronics, Inc.

Toll-free: 800-828-8840

24-hour SensorLine: 716-684-0001

Fax: 716-684-0987

E-mail: [email protected]

Web: www.pcb.com

Manual 21354 Rev E

ECN 50523

Repair and Maintenance

PCB guarantees Total Customer Satisfaction through its

“Lifetime Warranty Plus” on all Platinum Stock Products

sold by PCB and through its limited warranties on all other

PCB Stock, Standard and Special products. Due to the

sophisticated nature of our sensors and associated

instrumentation, field servicing and repair is not

recommended and, if attempted, will void the factory

warranty.

Beyond routine calibration and battery replacements

where applicable, our products require no user

maintenance. Clean electrical connectors, housings, and

mounting surfaces with solutions and techniques that will

not harm the material of construction. Observe caution

when using liquids near devices that are not hermetically

sealed. Such devices should only be wiped with a

dampened cloth—never saturated or submerged.

In the event that equipment becomes damaged or ceases

to operate, our Application Engineers are here to support

your troubleshooting efforts 24 hours a day, 7 days a

week. Call or email with model and serial number as well

as a brief description of the problem.

Calibration

Routine calibration of sensors and associated

instrumentation is necessary to maintain measurement

accuracy. We recommend calibrating on an annual basis,

after exposure to any extreme environmental influence,

or prior to any critical test.

PCB Piezotronics is an ISO-9001 certified company whose

calibration services are accredited by A2LA to ISO/IEC

17025, with full traceability to SI through N.I.S.T. In

addition to our standard calibration services, we also offer

specialized tests, including: sensitivity at elevated or

cryogenic temperatures, phase response, extended high

or low frequency response, extended range, leak testing,

hydrostatic pressure testing, and others. For more

information, contact your local PCB Piezotronics

distributor, sales representative, or factory customer

service representative.

Returning Equipment

If factory repair is required, our representatives will

provide you with a Return Material Authorization (RMA)

number, which we use to reference any information you

have already provided and expedite the repair process.

This number should be clearly marked on the outside of

all returned package(s) and on any packing list(s)

accompanying the shipment.

Contact Information

PCB Piezotronics, Inc.

3425 Walden Ave.

Depew, NY14043 USA

Toll-free: (800) 828-8840

24-hour SensorLine: (716) 684-0001

General inquiries: in[email protected]

Repair inquiries: rma@pcb.com

For a complete list of distributors, global offices and sales

representatives, visit our website, www.pcb.com.

Safety Considerations

This product is intended for use by qualified personnel

who recognize shock hazards and are familiar with the

precautions required to avoid injury. While our equipment

is designed with user safety in mind, the protection

provided by the equipment may be impaired if equipment

is used in a manner not specified by this manual.

Discontinue use and contact our 24-Hour Sensorline if:

Assistance is needed to safely operate equipment

Damage is visible or suspected

Equipment fails or malfunctions

For complete equipment ratings, refer to the enclosed

specification sheet for your product.

Definition of Terms and Symbols

The following symbols may be used in this manual:

DANGER

Indicates an immediate hazardous

situation, which, if not avoided, may

result in death or serious injury.

Manual 21354 Rev E

ECN 50523

CAUTION

Refers to hazards that could damage

the instrument.

NOTE

Indicates tips, recommendations and

important information. The notes

simplify processes and contain

additional information on particular

operating steps.

The following symbols may be found on the equipment

described in this manual:

This symbol on the unit indicates that

high voltage may be present. Use

standard safety precautions to avoid

personal contact with this voltage.

This symbol on the unit indicates that

the user should refer to the operating

instructions located in the manual.

This symbol indicates safety, earth

ground.

Manual 21354 Rev E

ECN 50523

PCB工业监视和测量设备 - 中国RoHS2公布表

PCB Industrial Monitoring and Measuring Equipment - China RoHS 2 Disclosure Table

部件名称

有害物质

铅(Pb)

汞

(Hg)

镉

(Cd)

六价铬(Cr(VI))

多溴联苯 (PBB)

多溴二苯醚(PBDE)

住房

PCB板

电气连接器

压电晶体

环氧

铁氟龙

电子

厚膜基板

电线

电缆

塑料

焊接

铜合金/黄铜

本表格依据 SJ/T 11364 的规定编制。

O：表示该有害物质在该部件所有均质材料中的含量均在 GB/T 26572 规定的限量要求以下。

X：表示该有害物质至少在该部件的某一均质材料中的含量超出 GB/T 26572 规定的限量要求。

铅是欧洲RoHS指令2011/65/ EU附件三和附件四目前由于允许的豁免。

CHINA RoHS COMPLIANCE

Manual 21354 Rev E

ECN 50523

Component Name

Hazardous Substances

Lead (Pb)

Mercury (Hg)

Cadmium (Cd)

Chromium VI

Compounds

(Cr(VI))

Polybrominated

Biphenyls (PBB)

Polybrominated

Diphenyl Ethers

(PBDE)

Housing

PCB Board

Electrical Connectors

Piezoelectric Crystals

Epoxy

Teflon

Electronics

Thick Film Substrate

Wires

Cables

Plastic

Solder

Copper Alloy/Brass

This table is prepared in accordance with the provisions of SJ/T 11364.

O: Indicates that said hazardous substance contained in all of the homogeneous materials for this part is below the limit

requirement of GB/T 26572.

X: Indicates that said hazardous substance contained in at least one of the homogeneous materials for this part is above the limit

requirement of GB/T 26572.

Lead is present due to allowed exemption in Annex III or Annex IV of the European RoHS Directive 2011/65/EU.

PRODUCT GUIDE

377 SERIES MICROPHONES

426 SERIES PREAMPLIFIERS

Contents:

1.0 Introduction................................................................................ 1

2.0 Standards.................................................................................... 1

3.0 Setting up a Microphone Measurement System ........................ 1

4.0 Taking Measurements................................................................ 3

5.0 Accessories and Miscellaneous.................................................. 3

6.0 Maintenance............................................................................... 4

7.0 Calibration.................................................................................. 5

8.0 Warranty and Service................................................................. 5

1.0 Introduction

Thank you for your purchase of a PCB high quality microphone. These microphones offer highly accurate

and reliable acoustic measurements and are typically used in research and design applications. They are

accurate enough for laboratory usage, yet rugged enough for field-testing.

Sound within the typical 20 to 20,000 Hz audible range of a healthy human ear can either be pleasing to the

ear, as in music, or unpleasant (or harmful), as in noise. As a result, many applications, from the develop-

ment of consumer products to research in acoustics, measure sound, even sound outside the range of human

hearing. The instrument typically used to measure sound is the microphone, which is designed, like the

human ear, to transform pressure oscillations into a corresponding voltage oscillation.

2.0 Standards

Before selecting an acoustical instrument, it is important to identify which acoustical standards are appro-

priate for the application in which the instrument will be used. Whether for legal purposes or for quality

assurance programs, these standards will help determine the required quality, accuracy and consistency of

the instrument. Standards that correspond to the performance requirements, dimensions and characteristics

of acoustical components are established for microphones, sound level meters, calibrators, or other related

components. The most common organizations producing these standards are the American National Stand-

ards Institute (ANSI) and the International Electrotechnical Commission (IEC). IEC 1094-4 establishes

specifications for the mechanical dimensions and certain electroacoustic characteristics for standard indus-

trial microphones. The performance specification sheet supplied with each PCB microphone identifies the

standards to which the microphone is compliant.

3.0 Setting up a Microphone Measurement System

After the proper microphone has been selected, the corresponding preamplifier, cabling, power supplies,

signal conditioning and data acquisition selections are ready to be installed. Not all of these components

are required for all test set-ups. The figures below show typical set-ups for externally polarized and pre-

polarized microphone systems.

A prepolarized microphone can be used with a standard Microphone Power Supply designed for externally

polarized microphones, and its preamplifier, provided the supply voltage is set to zero.

Phantom powered microphone systems use a 3 pin XLR connector. A phantom powered microphone sys-

tem should use a 48V phantom power supply or signal conditioner for optimum performance; however

these microphone systems may be powered with a 24V or a 12V phantom power supply, but this will limit

the maximum output voltage.

Externally Polarized Microphone System

Prepolarized Microphone System

Phantom Powered Microphone System

The phantom powered preamp may be used with either a ¼’’ or a ½’’ microphone cartridge by using the

adapter provided. All IEC 61094-4 compliant microphones can be used with the phantom powered preamp.

Adapters for Phantom Powered Preamp

4.0 Taking Measurements

The following formula is used to calculate the pressure measured by the microphone from the output voltage

signal. The sensitivity of a microphone is typically measured at 250 Hz.

Pressure (Pa) = Voltage (mV) / Sensitivity (mV/Pa).

The lowest amplitude a healthy human ear can detect is 20 millionths of a Pascal (20Pa). Another scale

more commonly used to describe sound pressure level is the decibel (dB). To convert the output voltage

signal (measured in Vrms) to sound pressure level (measured in decibels), use the following formula:

SPL

ref

rms 

























Log20

where S is the sensitivity of the microphone in mV/Pa, and Pref is the reference pressure in air, which is 20

x 10-6 Pa. The decibel scale is logarithmic and more closely matches the response reactions of the human

ear to the pressure fluctuations. Some examples of typical sound pressure levels are shown in the table

below.

Pressure

Example

0.00002 Pa

Threshold of Hearing

0.02 Pa

Business Office

0.2 Pa

Shop Noise

1 Pa

Large Truck

100

2 Pa

Jackhammer

120

20 Pa

Airplane Take-Off

140

200 Pa

Threshold of Pain

At very high-pressure amplitudes, the microphone’s diaphragm will start to distort the measured sound

pressure. The maximum rated sound pressure level of a microphone is expressed as the amplitude at which

the Total Harmonic Distortion (THD) reaches a specified amount, typically 3% THD. It is important to note

that the highest sound pressure level that can be measured with a microphone system may be limited by

other parts of the system, such as the preamplifier, signal conditioner, or instrumentation. Conversely, the

Cartridge Thermal Noise (CTN) specification provides the lowest measurable sound pressure level that can

be detected above the electrical noise inherent within the microphone.

Temperature and pressure will affect the sensitivity of a microphone but these effects can be accounted for

by adjusting the recorded microphone values using the coefficients specified for each microphone model.

Simply calculate the difference in temperature and ambient pressure from those recorded during calibration

and multiply this value by the proper coefficient to determine the sensitivity offset. In most cases, the offset

will be very small and is therefore unnecessary.

5.0 Accessories & Miscellaneous

Transducer Electronics Data Sheet (TEDS)

Preamplifiers can incorporate TEDS devices, which have a built in read/write memory that contains relevant

information about the sensor and its use. Information includes manufacturer name, model number, serial

number, sensitivity, etc. The operation of TEDS devices is defined by IEEE P1451.4. A TEDS microphone

system includes a microphone mated with a preamplifier that contains the TEDS memory programmed with

both the microphone and preamplifier information. This is particularly helpful when using large channel

count systems and array set-up.

A-Weight Inline Filter

The inline filter is used in conjunction with an ICP®preamplifier to provide A-weighting for acoustical

measurements. The filter’s frequency response is weighted according to the A-weighting filter portion of

both ANSI S1.4 and IEC 60651 Type 1 Sound Level Meter Standards. ICP®signal conditioners of 4 mA

or greater are recommended when using inline filters.

Windscreens and Nose cones

Wind induced noise can be reduced by using a windscreen. This can offer some protection against dust

particles and mechanical damage. In the presence of high-speed airflow from a well-defined direction, such

as wind tunnels, a nose cone is recommended. When using windscreens and noise cones, the frequency

response of the microphone will be attenuated at higher frequencies.

Clamps and stands

When holding a microphone in place, it is important to minimize the influence of the stand on the sound

being measured. This can be accomplished by using low profile stands and clamps available from PCB.

Cables and Electronics

PCB carries LEMOcables as well as coaxial cables with BNC and 10-32 connectors. Traditional exter-

nally polarized microphone power supplies along with a variety of ICP®signal conditioners are available

that will fit almost any need.

6.0 Maintenance

Microphones are very stable over long periods of time, provided they are handled and stored properly. The

microphone contains fragile components that can be damaged by misuse, in particular the diaphragm, which

is made up of a very thin proprietary material and should be kept clean of dust, dirt, moisture and free any

type of imperfection (scratch, dent, etc.).

The microphone’s grid cap is designed to let the true sound pressure level through to the diaphragm while

preventing items from coming in contact with it. We do not recommend that you ever remove the grid cap

or clean the microphone. If you take the precautionary measures to keep the microphone clean and dry, it

should not be necessary. Should you need to remove the grid cap to replace it with PCB’s enhanced rugged

grid cap (shown below, and as an independent part of a rugged kit) to extend the lifespan of the precision

measuring device, caution should be taken to ensure the delicate diaphragm sensing element remains un-

touched and safe.

Use of accessories, like windscreens, and desiccants will help keep moisture off the microphone and main-

tain the specified sensitivity level. Nose cones will help keep turbulence off the microphone diaphragm and

allow the sound pressure to be measured with greater accuracy.

Keep the microphone and preamplifier assembled while preparing for testing. Keep the rubber maintenance

caps on the preamplifier’s electrical connector only. Do not place these rubber caps over the microphone.

This will create a vacuum and undo pressure on the microphone diaphragm, which can stretch the dia-

phragm and cause a change in sensitivity. Store the microphones and preamplifiers in their protective cases

when not in use.

Dust, rain, oil, moisture or exposure to extreme temperatures may adversely affect the microphone and

preamplifier’s performance. If the microphone or the inside of the connection area of the preamplifier be-

comes contaminated, use a light pressure rubber bulb to gently blow clean, dry air onto the unit in order to

remove the dust. In the event that you absolutely must take off the grid cap and clean the microphone

diaphragm, we recommend using a blow bulb or a light pressure, clean and dry air hose to gently blow

contamination off the diaphragm. The direction of the air should be parallel with the diaphragm, not directly

(0 degree incidence) pointed at the diaphragm. Do not touch the microphone’s diaphragm with your fingers

or let it come in contact with any sharp or pointed object. Please note that any contact to the microphone’s

diaphragm can negatively impact the sensitivity and long term stability of the microphone.

If the microphone is ever dropped (the effects of this can be minimized by PCB’s rugged grid cap or utilizing

rugged microphone kits), or comes into contact with any contamination, or is exposed to extreme tempera-

tures, immediate recalibration of the microphone should be performed. When using a rugged grid cap, a

handheld calibrator with a 1” diameter (example CAL250, or pistonphone) is required for recalibration,

along with the larger (079A59) calibration adapter. Please note that heat from your hands can affect the

calibration results. It is always good practice to wait a minimum of 30 seconds after placing the microphone

on a test system before taking a calibration reading in order to minimize the effect that heat from your hands

has on the calibration. Changes in the environmental conditions: temperature, humidity or atmospheric

pressure, may cause a change in your microphones sensitivity and thus, changes in your output accuracy. It

is always recommended to calibrate both before and after your test, within the test environment. Performing

a single point handheld calibrator check, both before and after your test, ensures reliability of the test data.

With proper maintenance, the microphone and preamplifier should provide stable and accurate results for

years to come.

7.0 Calibration

PCB offers recalibration services for our precision microphones, as well as units produced by other A2LA

manufacturers. Our internal metrology laboratory is certified to ISO 9001, accredited by A2LA to

ANSI/IEC 17025 and ANSI/NCSL Z540-1, complies with ISO 10012-1 (and former MIL-STD-45662A),

and uses equipment directly traceable to one or more of the following National Labs (NIST, PTB or DFM).

Our investment in equipment, traceability and conformance to industry standards ensures accurate calibra-

tion against relevant specifications. We also carry a line of acoustic calibrators that can be used to calibrate

microphone sensitivity on site as needed.

Hand calibration of sensitivity for most prepolarized microphones may be performed with a Larson Davis

CAL250 or CAL200 (or equivalent). The CAL250 produces 114 dB SPL at 251.2 Hz. The CAL 200

produces either 94 dB or 114 dB (user selectable) at 1000 Hz. Note that both the CAL250 and CAL 200

are compliant with ANSI S1.40-2006, Specifications and Verification Procedures for Sound Calibrators,

Class1 and IEC 60942-2003, Class 1, Sound Calibrators.

8.0 Warranty and Service

All equipment and repair services provided by PCB Piezotronics, Inc. are covered by a warranty against

defective material and workmanship under a Total Customer Satisfaction policy. If, at any time, for any

reason, you are not completely satisfied with any PCB product, PCB will repair, replace, or exchange it at

no charge. You may also choose to have your purchase price refunded. See the supplemental sheet, con-

tained with this manual, for information on our service, repair and return policies, procedures and instruc-

tions. When unexpected problems arise, call our 24-Hour SensorLineSM (716-684-0001) to speak with an

Application Engineer. Visit www.pcb.com for a complete statement of our warranty.

3425 Walden Avenue, Depew, NY 14043-2495 24-hour SensorLineSM: 716-684-0001

E-Mail: [email protected] U.S.A. Fax: 716-684-0987

Website: www.pcb.com Toll-free (in the U.S.A.): 800-828-8840

A PCB GROUP COMPANY ISO 9001 CERTIFIED A2LA ACCREDITED to ISO 17025

2014 PCB Group, Inc. In the interest of constant product improvement, specifications are subject to change without notice.

PCB and ICP are registered trademarks of PCB Group, Inc. Sensor Line is a service mark of PCB Group, Inc. All other trademarks

are properties of the respective owners.

Manual Number: 27042

Manual Revision: F

ECO 51020

Printed in the U.S.A.

Este manual sirve para los siguientes modelos

Tabla de contenidos

Otros manuales de Sistema de micrófono de PCB Piezotronics

PCB Piezotronics

PCB Piezotronics 377B11 Manual de usuario

PCB Piezotronics

PCB Piezotronics 377A07 Manual de usuario

PCB Piezotronics

PCB Piezotronics 376B02 Manual de usuario

PCB Piezotronics

PCB Piezotronics 378C13 Manual de usuario

PCB Piezotronics

PCB Piezotronics 377A15 Manual de usuario

PCB Piezotronics

PCB Piezotronics 377 Series Manual de usuario

PCB Piezotronics

PCB Piezotronics 378B20 Manual de usuario

PCB Piezotronics

PCB Piezotronics 377 Series Manual de usuario

PCB Piezotronics

PCB Piezotronics 378B13 Manual de usuario

PCB Piezotronics

PCB Piezotronics HT378A06 Manual de usuario

PCB Piezotronics

PCB Piezotronics 377A14 Manual de usuario

PCB Piezotronics

PCB Piezotronics 376A32 Manual de usuario

PCB Piezotronics

PCB Piezotronics 378C20 Manual de usuario

PCB Piezotronics

PCB Piezotronics 377 Series Manual de usuario

PCB Piezotronics

PCB Piezotronics 377 Series Manual de usuario

PCB Piezotronics

PCB Piezotronics 378C01 Manual de usuario

PCB Piezotronics

PCB Piezotronics 376A31 Manual de usuario

PCB Piezotronics

PCB Piezotronics 378A13 Manual de usuario

PCB Piezotronics

PCB Piezotronics 377 Series Manual de usuario

PCB Piezotronics

PCB Piezotronics 377 Series Manual de usuario

PCB Piezotronics

PCB Piezotronics HT378B02 Manual de usuario

PCB Piezotronics

PCB Piezotronics 377 Series Manual de usuario

PCB Piezotronics

PCB Piezotronics 377 Series Manual de usuario

PCB Piezotronics

PCB Piezotronics 377B02 Manual de usuario

Manuales populares de Sistema de micrófono de otras marcas

Paso

Paso R824 Manual de usuario

Naxa

Naxa NAM-982 Manual de usuario

Motorola

Motorola PMNN4461 Manual de usuario

Xvive

Xvive U3 Manual de usuario

Tekon

Tekon DUOS Manual de usuario

Heyuan Intelligence

Heyuan Intelligence IOT-G2S-01 Manual de usuario

Devine

Devine WMD-IE Manual de usuario

LG LF-D7150 Manual de usuario

GE S768DAV Manual de usuario

LD U305 HBH 2 Manual de usuario

Chainway

Chainway URA8 Manual de usuario

ORATOR

ORATOR D860TD Manual de usuario

Sennheiser

Sennheiser Evolution Wireless Digital EW-DX EM 2 Manual de usuario

Alpha Technologies

Alpha Technologies RBMS Manual de usuario

SWIT Electronics Co.,LTD.

SWIT Electronics Co.,LTD. CW-S150 Manual de usuario

Shure

Shure UA844 Manual de usuario

Panasonic

Panasonic SHFX70 - DVD HOME THEATER WIRELESS SYSTEM Manual de usuario

Pyle

Pyle PDWM5000 Manual de usuario