PCB Piezotronics 103B12 Bedienungsanleitung

Model 103B12

PRESSURE SENSOR, ICP®, ACOUSTIC

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

The information contained in this document supersedes all similar information that

may be found elsewhere in this manual.

Total Customer Satisfaction – PCB

Piezotronics guarantees Total Customer

Satisfaction. 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 in lieu of the repair,

replacement, or exchange of the product.

Service – Due to the sophisticated nature

of the sensors and associated

instrumentation provided by PCB

Piezotronics, user servicing or repair is

not recommended and, if attempted, may

void the factory warranty. Routine

maintenance, such as the cleaning of

electrical connectors, housings, and

mounting surfaces with solutions and

techniques that will not harm the

physical material of construction, is

acceptable. Caution should be observed

to insure that liquids are not permitted to

migrate into devices that are not

hermetically sealed. Such devices should

only be wiped with a dampened cloth

and never submerged or have liquids

poured upon them.

Repair – In the event that equipment

becomes damaged or ceases to operate,

arrangements should be made to return

the equipment to PCB Piezotronics for

repair. User servicing or repair is not

recommended and, if attempted, may

void the factory warranty.

Calibration – Routine calibration of

sensors and associated instrumentation is

recommended as this helps build

confidence in measurement accuracy and

acquired data. Equipment calibration

cycles are typically established by the

users own quality regimen. When in

doubt about a calibration cycle, a good

“rule of thumb” is to recalibrate on an

annual basis. It is also good practice to

recalibrate after exposure to any severe

temperature extreme, shock, load, or

other environmental influence, or prior

to any critical test.

PCB Piezotronics maintains an ISO-

9001 certified metrology laboratory and

offers calibration services, which are

accredited by A2LA to ISO/IEC 17025,

with full traceablility to N.I.S.T. In

addition to the normally supplied

calibration, special testing is also

available, such as: sensitivity at elevated

or cryogenic temperatures, phase

response, extended high or low

frequency response, extended range, leak

testing, hydrostatic pressure testing, and

others. For information on standard

recalibration services or special testing,

contact your local PCB Piezotronics

distributor, sales representative, or

factory customer service representative.

Returning Equipment – Following

these procedures will insure that your

returned materials are handled in the

most expedient manner. Before returning

any equipment to PCB Piezotronics,

contact your local distributor, sales

representative, or factory customer

service representative to obtain a Return

Warranty, Service, Repair, and

Return Policies and Instructions

Materials Authorization (RMA)

Number. This RMA number should be

clearly marked on the outside of all

package(s) and on the packing list(s)

accompanying the shipment. A detailed

account of the nature of the problem(s)

being experienced with the equipment

should also be included inside the

package(s) containing any returned

materials.

A Purchase Order, included with the

returned materials, will expedite the

turn-around of serviced equipment. It is

recommended to include authorization

on the Purchase Order for PCB to

proceed with any repairs, as long as they

do not exceed 50% of the replacement

cost of the returned item(s). PCB will

provide a price quotation or replacement

recommendation for any item whose

repair costs would exceed 50% of

replacement cost, or any item that is not

economically feasible to repair. For

routine calibration services, the Purchase

Order should include authorization to

proceed and return at current pricing,

which can be obtained from a factory

customer service representative.

Warranty – All equipment and repair

services provided by PCB Piezotronics,

Inc. are covered by a limited warranty

against defective material and

workmanship for a period of one year

from date of original purchase. Contact

PCB for a complete statement of our

warranty. Expendable items, such as

batteries and mounting hardware, are not

covered by warranty. Mechanical

damage to equipment due to improper

use is not covered by warranty.

Electronic circuitry failure caused by the

introduction of unregulated or improper

excitation power or electrostatic

discharge is not covered by warranty.

Contact Information – International

customers should direct all inquiries to

their local distributor or sales office. A

complete list of distributors and offices

can be found at www.pcb.com.

Customers within the United States may

contact their local sales representative or

a factory customer service

representative. A complete list of sales

representatives can be found at

www.pcb.com. Toll-free telephone

numbers for a factory customer service

representative, in the division

responsible for this product, can be

found on the title page at the front of this

manual. Our ship to address and general

contact numbers are:

PCB Piezotronics, Inc.

3425 Walden Ave.

Depew, NY 14043 USA

Toll-free: (800) 828-8840

24-hour SensorLineSM: (716) 684-0001

Website: www.pcb.com

E-mail: [email protected]

DOCUMENT NUMBER: 21354

DOCUMENT REVISION: B

ECN: 17900

Drawing Number: 21082

Revision: NR

OPERATION MANUAL FOR

MICROPHONE

Series 103A 1

1.0 DESCRIPTION

The Series 103A microphones are high-sensitivity

pressure sensors featuring miniature size, built-in

solid state electronics and acceleration compensation.

The Model 103A (see installation drawing) has

pigtail leads extending radially from the side of the

unit and has a nominal sensitivity of 1500 mV/psi.

The Model 103A11 is similar in appearance and in

mode of electrical connection, but differs from the

Model 103A in that the sensitivity is nominally 500

mV/psi.

Models 103A and 103A11: ICP® Sound Pressure

Sensors

The Model 103A02 is similar physically to the 103A

and has similar sensitivity (1500 mV/psi), but the

electrical connection is made through a top mounted

10-32 coaxial connector.

The Model 103A12 also has the top connector like

the 103A02 but the sensitivity is 500 mV/psi.

These units are ideal for wind tunnel testing of

models because of the small size and high sensitivity.

Models 103A02 and 103A12: ICP®Sound

Pressure Sensors

2.0 DESCRIPTION

(Refer to installation drawing no. 103-1010-90

included as part of this manual.)

The 103A Series Sensors utilize a bimorph bender

crystal cantilevered from the side wall and attached to

the center of a thin recessed invar diaphragm.

Pressure acting on the surface of the diaphragm

results in a net force which strains (or deflects) the

diaphragm in proportion to the applied pressure. The

diaphragm bends the crystal creating an output

voltage which is also proportional to applied

pressure.

This voltage is fed to the gate of a miniature

MOSFET source follower amplifier which reduces

the output impedance to less than 100 Ohms allowing

the driving of long cables and permitting operating

directly into most readout instruments.

Refer to Bulletin G-0001B, “General Guide to ICP®

Instrumentation”for a detailed description of the

built-in amplifier concept.

Models 103A, A02, A11, and A12 have output

signals superimposed upon a +4 V (approx.) bias

level at the amplifier output. All PCB signal

conditioners are designed to eliminate this bias

voltage while supplying power to the internal

amplifier.

Drawing Number: 21082

Revision: NR

OPERATION MANUAL FOR

MICROPHONE

Series 103A 2

The result is a two-wire system, precluding the need

for multi-conductor cabling.

A second diaphragm, located behind the pressure

diaphragm and attached to another bimorph bender

crystal acting in opposition to the pressure crystal,

provides acceleration compensation to the Series

103A Sensors.

3.0 INSTALLATION

As shown in installation drawing 103-1010-90, the

Series 103A Microphones may be properly mounted

in several ways, the exact method chosen being a

function of the space available along with other use

dictated parameters.

The simplest method of mounting, and also the one

that utilizes the least volume, is the adhesive method.

The microphone is simply bonded directly to the

mounting surface with an (at least) .10”diameter hole

through the surface to feed the pressure signal to the

diaphragm.

Many different types of adhesives may be used to

bond the 103A in this manner. The important point

being to apply the adhesive very sparingly so that

removal does not damage the sensor.

The 103A may also be mounted using the Model

061A04 Servo clamps if space is available.

The Model 060A11 Clamp Nut may only be used

with the top connector Models 103A02 and 103A12

since the radial wire leads of the Model 103A and

103A11 would interfere with the clamp nut. The

installation drawing gives detailed instructions on

preparation of the port for this type of installation.

3.1 ELECTRICAL

For the Models 103A and 103A11 (pigtail models),

connect the center conductor from the “Xducer”

output of any ICP®power unit to the white (Pwr/Sig)

lead and connect the outer shell of the “Xducer”

connector to the black (ground) lead. The black lead

is electrically connected to the outer case. (See figure

below.)

Models 103A & All: Electrical Connection

NOTE: No electrical connection is made to the

blue (vent) lead. This lead serves to vent internal

pressure within the sensor when the 103A and

103A11 are used in evacuated chambers. The

internal pressure bleeds out slowly around the wires

of this lead. This lead may be cut off flush with body

if the sensor will never be used in this manner.

To make the electrical connection to the Models

103A02 and 103A12 (top connector models), simply

connect the “Xducer”output of the power unit to the

10-32 coaxial connector using a PCB Model 002C

Series coaxial cable.

The output signal is taken from the power unit

connector labeled “Scope”or “Output”. (See figure

below.)

MODEL 103A02 & A12

XDUCER

MODEL 482A04

SCOPE

READOU

Models 103A02 & A12: Electrical Connection

WHITE

BLUE (N.C.)

XDUCER

BLACK

VIEW FROM

DIAPHRAGM

END

SCOPE

READOUT

SERIES 480

Drawing Number: 21082

Revision: NR

OPERATION MANUAL FOR

MICROPHONE

Series 103A 3

Refer to Guide G-0001B for tips on power and signal

utilization.

NOTE: The internal low-noise amplifier in the

Model 103A, A02, A11 and A12 differ from the

standard ICP®amplifiers described in Guide G-

0001B in that the turn-on (or bias) voltage is

nominally +4 volts.

Proper turn-on for Models 103A02, A11 and Al 2

will not give center scale reading on the fault monitor

meters found on most PCB signal conditioners but

will show a reading of approximately 20% of F.S. on

these meters. This puts it at the lower limit of the

green (or normal) area of the meters. This is normal

and in no way indicates faulty operation.

4.0 OUTPUT SIGNAL

The output signal from the 103A Series is a voltage

proportional to input pressure. The polarity is

positive-going for increasing input pressure.

The signal is of high enough level and low enough

output impedance to be fed directly into most

oscilloscopes, tape recorders, strip chart recorders, A

to D converters, etc.

Consult the factory for information regarding galvo

driving since special amplifiers are needed to drive

most high-current galvanometers.

Low-frequency response is limited by sensor

discharge TC (given in the specification sheet) and by

coupling time constants throughout the system. To

take full advantage of the TC of the sensor, make sure

that coupling TC's from power unit to readout are at

least an order of magnitude longer than the discharge

TC or use a direct-coupled signal conditioner such as

the Model 484B. Consult factory for details.

5.0 CALIBRATION

The 103A Series Sensors must be dynamically

calibrated using a known step function or pulse, or

with a microphone calibrator.

At PCB, the units are subjected to various calibrated

steps of pneumatic pressure to obtain a linearity curve

over the full range of the instruments.

6.0 MAINTENANCE AND REPAIR

The small size and sealed construction of the Series

103A precludes field maintenance and repair.

Should the time constant degrade or an abnormality

appear in the normal bias voltage, bake the unit out in

a +250° F oven for 1 to 2 hours, then re-test.

If this is not effective or if other problems should

occur, contact the factory for assistance in tracing the

problem or for instructions on returning the unit for

repair.

7.0 PRECAUTIONS

l.) Do not apply voltage to the unit without a

current-limiting device in the line such as

incorporated in all PCB signal conditioners, (20 mA

maximum) to do so will destroy the internal amplifier.

2.) Do not subject these units to temperatures

higher than 250° F.

3.) Do not attempt to disassemble these units as

to do so voids the warranty.

4.) Use caution when removing units that have

been mounted with epoxies or other strong adhesives.

Excessive squeezing or torquing may damage the

units and/or cause a calibration shift.

5.) In vibratory environments, secure cables and

leads to surrounding structures to avoid lead or cable

damage.

6.) Do not over torque when using the Servo

clamps or the clamp nut since this could damage the

units.

7.) Do not overpressure (see specs for

maximum pressure), to do so may change the

calibration.

®ICP is a registered trademark of PCB Piezotronics

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