PCB Piezotronics 130E21 Bedienungsanleitung

Model 130E21

ICP® Electret Array Microphone

Installation and Operating Manual

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.

- 1 -

ICPis a registered trademark of PCB Group, Inc.

OPERATING GUIDE FOR 130 SERIES MICROPHONES

Contents:

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

2.0 Product Description ..................1

3.0 Powering ...................................2

4.0 Installation and Operation.........3

5.0 Calibration.................................4

6.0 Service.......................................6

7.0 Warranty....................................6

Figure 1

1.0 Introduction

Congratulations on the purchase of a quality, ICPMicrophone. In order to ensure the highest

level of performance for this product, we recommend that you follow the basic installation and

operation procedures in this guide. By following these procedures, along with utilizing this

Microphone in conjunction with other PCB equipment (Signal Controllers, Power Supplies,

Cables, Calibrators, etc.), you will ensure years of trouble-free usage. If, after reading this

manual, you have additional questions concerning the Microphone or its application, feel free to

call a factory Application Engineer at 716-684-0001, or your nearest PCB Sales Representative.

2.0 Product Description

The PCB 130 series of Array Microphones are prepolarized, condenser microphones coupled

with ICPsensor powered preamplifiers and are thus referred to as ICPmicrophones. This

eliminates the need to purchase a separate preamplifier. The 130 series microphones provide an

extremely cost-effective method for large channel count sound pressure measurements. Typical

applications include sound pressure mapping, acoustic mode analysis, near-field acoustic

holography, and vibro-acoustic testing, along with other applications.

130E20

130E21

130E22

130A23

130A24

- 2 -

The 130E20, 130E21, 130E22, 130A23 and 130A24 Microphones (Figure 1) are all Array

Microphones with integral preamplifiers. These Microphones are 7mm in diameter and have a

dynamic range of up to 150dB before clipping occurs, depending on the model. The 130A24 is a

rugged microphone that is water/dust resistant and 13mm in diameter. The 130E20 and 130A24

include a BNC Jack, 130E21 includes a 10-32 Coaxial Jack, and the 130E22 and 130A23 both

include a SMB Coaxial Socket. All 130 series Microphones are Prepolarized. By applying a high

temperature polymer material, which contains frozen electrical charges, to the top of the

backplate, PCB has eliminated the need for external Polarization. This saves you money and

time.

The 130 Series Array Microphones have the following Features:

Lower per Channel Cost

Use ICPSensor Power

Prepolarized

Reduce Test Time

Increase Data Consistency

Integrate with Signal Conditioners

Includes TEDS compliant with IEEE

1451.4

With their integrated ICPpreamplifier and Prepolarization, these microphones can be powered

by simple, inexpensive, constant-current Signal Conditioners. These units are easy to operate,

and they interface with many standard signal analysis, data acquisition and recording

instruments. They utilize low-impedance cable on which signals can be driven long distances

with minimal signal loss.

3.0 Powering

All ICPpowered microphones require correct constant-current excitation for proper operation.

For this reason, use only PCB constant-current signal conditioners or other approved constant-

current sources. The signal conditioner consists of a regulated, 18-30 VDC source. The power is

regulated by a current-limiting circuit, which provides the constant current excitation required

for proper operation of the ICPMicrophone. In general, battery powered devices offer

versatility for portable low-noise measurements, whereas line-powered units provide the

capability for continuous monitoring. A typical system schematic is shown in Figure 2.

Figure 2

Certain models of signal conditioners have meters or LEDS, which enable users to monitor the

bias voltage output signal, check microphone operation, and detect cable faults. Normally, a

“yellow” reading indicates an open circuit (example: a cable disconnected); “green” indicates

Note: Under no circumstances should

a voltage be supplied to an ICP

microphone without a current-

regulating diode or equivalent

electrical circuit. This may include

ohmmeters, multi-meters and

continuity testers. Damage to the

built-in electronics resulting from the

application of incorrect power, or the

use of an unapproved power source, is

NOT covered under warranty.

Microphone

Signal

Conditioner

Readout

- 3 -

normal operation and a “red” reading indicates a short circuit (example: a shorted cable). The

signal conditioner provides a zero-based, AC-coupled, output signal that is compatible with most

standard readout devices.

Many FFT analyzers, data acquisition modules, and data collectors have the proper constant-

current excitation built-in for direct use with ICPmicrophones. Before using this feature, make

sure the supply voltage and constant current are within acceptable limits for use with your

particular microphone. (Check the enclosed Specification Sheet.)

4.0 Installation and Operation

There are many ways to support the microphone to take measurements, from simply placing the

microphone in a clip to using a 2D array stand, as determined by your application and budget.

After you remove the microphone from its package and have read this operating guide, attach the

appropriate cable between the Signal Conditioner and the microphone. You will then need to

attach a second cable to connect the Signal Conditioner to your readout device. This is a standard

Coaxial cable with BNC connectors on each end. PCB offers these cables in a variety of lengths

for any application.

Figure 3

All of the 130 series Array Microphones are the “Free-Field” type. This type of microphone is

direction-sensitive and should be pointed directly at the object you are measuring. The “Free-

Field” type of microphone is best suited for applications where the sound is coming from one

defined direction, without any disturbing objects or hard surfaces that will reflect the sound or

cause reverberation. After completing the system setup, power on the signal conditioner and

allow 1 to 2 minutes for the system to stabilize. The meter (or LED) on the signal conditioner

should be reading “green”. This indicates proper operation and you may begin taking

measurements. If a faulty condition is indicated (red or yellow reading), first check all system

connections, then check the functionality of the cable and signal conditioner. If the system still

does not operate properly, consult a PCB Application Engineer.

When used in conjunction with a

large number of signals, for

simultaneous measurement, the

microphones can be clipped onto a

grid network to form a complete

array. See Figure 3.

- 4 -

The 130A24 microphone design includes a removable grid cap

and replaceable protective cover. This unique feature allows the

130A24 to withstand harsh environments while extending the

lifespan of the microphones’critical sensitive components.

Should the water and dust resistant cover get damaged due to

prolonged exposure to harsh conditions, a removable grid cap

allows the user to replace this protective cover quickly and easily

in a few simple steps. First, unthread the grid cap from the housing. Next, peel off the existing

cover from the end of the housing. Sharp edged tools can be used to aid in cover removal, but it

is important to keep the tool at an angle that is parallel to the black covers surface area so that no

contact with the microphone’s delicate diaphragm underneath occurs (Figure 4). To ensure a

proper seal, gently wipe the top of the microphone housing to remove any moisture or debris.

Apply the replacement water-resistant patch to the end of the housing, keeping it centered.

Finally, assemble the grid cap back onto the housing. Optional 079A46 five pack replacement

water resistant pads can be ordered from PCB.

5.0 Calibration

All PCB microphones come with a certificate of calibration and compliance with ISO 9001 and

ANSI/NCSL Z540.3. In order to keep the array microphone cost effective, the 130 series

calibrations are not A2LA accredited. For A2LA accredited microphones, please select our 377

and 378 series of acoustic products. PCB microphones are traceable to one or more of the

following National Labs (NIST, PTB or DFM), and calibration records are on file. PCB utilizes

the “Back-to-Back Reference” form of calibration for the 130 series of array microphones. The

microphone is checked against a test and measurement working standard microphone and must

meet specifications before it can be shipped. An example of a calibration certificate is shown on

the following page (Figure 5).

Figure 4

- 5 -

Figure 5

Microphone calibration provides, with a definable degree of accuracy, the necessary link

between the physical quantity being measured and the electrical signal generated by the

microphone. In addition, other useful information concerning operational limits, physical

parameters, electrical characteristics or environmental influences may be determined. Under

normal conditions, microphones are very stable. However, the microphone may be temporarily

or permanently affected by harsh influences, such as moisture, dirt, being accidentally dropped

or other unusual conditions that may cause the microphone accuracy to deviate from the normal

specifications. This may manifest itself in a number of ways, ranging from a loss in frequency

range, to total failure of the built-in microelectronic circuit due to high mechanical shock.

~ Calibration Certificate ~

Model Number: 130E21

Serial Number: 37649

Description: ICP® Microphone

Manufacturer:

PCB Method 1: Back-to-Back Reference

Calibration Data

Sensitivity: 48.1 mV/Pa Reference Freq.: 250 Hz.

-26.4

dB re 1V/Pa

Output Bias: 8.6 VDC

Temperature: 71 °F 22 °C Relative Humidity: 50 %

Condition of Unit

As Found: n/a

As Left: New Unit, In Tolerance

Notes

1. This method involves comparingthe test unit with a reference microphone in a GRAS 51AB calibrator.

2. Calibration is PTB Traceable and calibration records are on file.

3. Calibration is performed in compliance with ISO 9001, ISO 10012-1 and ANSI/NCSL Z540.3.

4. Due to state-of-the-art limitations, 4:1 calibration ratios are not possible on pressure measurement standards, microphones

and acoustic calibrators. Calibration ratios for these types of devices are limited to 1:1.

5. See Manufacturer’s Specification Sheet for a detailed listing of p erformance specifications.

6. This certificate shall not be reproduced, except in full, without written approval from PCB Piezotronics, Inc

7. Calibrated per ACS-21.

Technician: Date:

Headquarters: 3425 Walden Avenue, Depew, NY 14043

Calibration performed at: 10869 Highway 903, Halifax, NC 27839

Page 1of 1 TEL: 888-684-0013 FAX: 716-685-3886

www.pcb.com

CAL58-3465911589.795

October 29, 2013

Scott Skibniewski

-10

-5

10 100 1000 10000 100000

Response Deviation (dB)

Frequency (Log Hz.)

Response Plot

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