PCB Piezotronics ICP 108A04 Manual de usuario

Model 108A04

ICP® Pressure Sensor

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.

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 ensure 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 traceability to SI through

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 ensure 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

Service, Repair, and Return

Policies and Instructions

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.

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, NY14043 USA

Toll-free: (800) 828-8840

24-hour SensorLineSM: (716) 684-0001

Website: www.pcb.com

E-mail: [email protected]

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

DOCUMENT NUMBER: 21354

DOCUMENT REVISION: D

ECN: 46162

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.

Drawing Number: 21113

Revision: A

OPERATION MANUAL FOR

ICP®HIGH PRESSURE SENSORS

Series 108 & 109

1.0 INTRODUCTION

The 108 & 109 Series are acceleration-compensated,

high pressure, ICP®(Integrated Circuit Piezoelectric)

sensors primarily developed to measure ballistics

chamber pressures for R & D and production testing

of ammunition. They may also be used for explosive

air blast and other high pressure measurements in

extreme shock environments where ultra-fast, micro-

second response is required. These types of tests are

usually accompanied by large acceleration pulses,

which can add considerable error to output signals of

un-compensated sensors.

The shoulder seal design features a one-piece

diaphragm machined integral with the housing for

ruggedness. A ceramic coating is applied to the

diaphragm to minimize flash temperature effects.

For applications where strain sensitivity from stress

within the mounting port is a concern, the 108A1X,

108B1X, 109B1X and 109C1X utilize a floating

clamp-nut design to reduce the effects, where “X”

denotes pressure range.

2.0 DESCRIPTION

The 108 & 109 Series contain an acceleration-

compensated piezo element, which is coupled to a

microelectronic amplifier. The quartz element

contains an integral seismic mass that counteracts the

acceleration effects of the end piece and diaphragm.

This compensation acts to extend the frequency

characteristics and enhance the transient response of

the sensor.

The machined diaphragm is made from maraging

steel, selected because of its high strength and

durability. The combination of the short, rigid

element and stiff diaphragm give these sensors a high

natural frequency and linearity.

The microelectronic amplifier converts the high-

impedance voltage from the quartz package into a

low-impedance, high-level output signal. See the

Technical Information section of our website for

more complete coverage of ICP®instruments.

3.0 INSTALLATION

With a 3/8-24 (M10x1.0 for metric mount) mounting

thread and flush diaphragm design, the 108 & 109

Series transducers mount directly in existing ports

machined for PCB Series 118 & 119.

Unlike conventional diaphragm type sensors, the 108

& 109 Series are pressure sensitive over the entire

frontal area. Extra care should be exercised to avoid

bottoming in the mounting hole when recess mounted

or when mounting into existing ports.

Install the sensor, using only one of the seals

provided, with the aid of a torque wrench to monitor

the mounting torque value. The recommended torque

range can be found on the installation drawing. Seals

should be replaced each time the sensor is re-

installed.

3.1 MOUNTING IN EXISTING

RECESSED PORTS

Before installing the sensor in previously used

mounting ports, clean out the residue from previous

tests. The port can be cleaned by hand reaming the ¼

inch diameter hole using a PCB Model 040A end

cutting reamer (040A07 for metric mount) guided by

PCB Model 041A pilot bushing (M041A for metric

mount).

Pay particular attention to the sealing surface,

keeping it free from tool chatter marks, nicks and

other imperfections that could adversely affect the

seal. If the sealing surface requires re-machining

after prolonged use, refer to the installation drawing

to ensure that the ¼ inch hole is deepened to avoid

bottoming of the sensor when re-installed.

10-32 COAXIAL

CONNECTOR

5/16 HEX

3/8-24 THREAD

QUARTZ ELEMENT

CERAMIC COATING

ICP® AMPLIFIER

Drawing Number: 21113

Revision: A

OPERATION MANUAL FOR

ICP®HIGH PRESSURE SENSORS

Series 108 & 109

Existing Recessed Ports

If waveform distortion occurs during prolonged

testing, remove the sensor and clean the residue as

illustrated above.

3.2 PREPARING NEW MOUNTING

PORTS

Refer to the installation drawing provided in this

manual for instructions on mounting hole preparation.

For best results, do not deviate from the steps

outlined in this drawing.

To assist new mounting port preparation, PCB offers

the 040B20 Tooling Kit (040B21 for metric mount).

These installation kits provide all of the necessary

tooling required to drill, ream, and tap the mounting

ports for proper installation of the 108, 109, 118 and

119 Series transducers.

Use good machining practice in preparation of the

mounting port, paying particular attention to the seal

surface. It is important that this surface be perfectly

smooth and free from tool chatter marks, nicks and

other imperfections which might cause leaks at high

pressures.

3.3 RECESSED MOUNT

The recessed installation is shown in the Recessed

Mount figure. This type of mounting protects the

sensor diaphragm from the effects of high-flash

temperatures and particle impingement due to blast

effects, thereby prolonging sensor life.

The recommended range of passage diameters is

0.090 to 0.125 inch (2.29 to 3.18 mm) diameter.

The limitation in this type of installation lies in the

frequency-limiting effects of the passage due to its

length.

The passage behaves like an underdamped second

order system; the resonant frequency being

determined by the passage length. The length may

have a limiting effect on pressure pulse rise time and

cause passage ringing in cases where the passage is

too long.

Recessed Mount

The following relationship approximates this resonant

frequency (fr):

(Hz)

fr

(EQ. 1)

Where: fr = Resonant frequency of passage (Hz)

V = Velocity of sound in air (ft/sec)

L = Length of column (ft)

For air at room temperature, (EQ. 1) becomes:

0033

fr

(EQ. 2)

Where: L = Passage length (in)

MODEL 040A

REAMER

MODEL 041A

PILOT BUSHING

0.010

MIN

Drawing Number: 21113

Revision: A

OPERATION MANUAL FOR

ICP®HIGH PRESSURE SENSORS

Series 108 & 109

The natural frequency and approximate fastest

pressure step rise time for various length passages is

shown in the following chart. (Medium, air at 25C).

PASSAGE

LENGTH (in)

PASSAGE

RESONANCE

(kHz)

APPROX.

FASTEST PULSE

RISE TIME (sec)

.050

.100

.200

16.5

.50

6.6

1.0

3.3

100

Passage Resonance vs. Passage Length

Actual resonant frequencies measured in practice may

differ slightly from the chart values. These

differences are due to variations in the velocity of

propagation of sound in air caused by changes in

temperature and pressure of the air in the passage.

For best matching of passage to diaphragm, maintain

the 0.010 inch (0.254 mm) clearance ahead of the

diaphragm as shown in the Recessed Mount figure on

the previous page.

3.4 FLUSH MOUNT

In the flush mount installation, there is no reduced

area passage from the sensor diaphragm to the test

chamber; rather the sensor diaphragm is mounted

flush with (or slightly recessed from) the inside

surface of the test chamber.

Use this type of installation only if space or rise time

considerations preclude the use of recessed

installation.

In severe pyrotechnic environments, sensor life may

be severely limited with flush installation.

3.5 FLASH TEMPERATURE

EFFECTS

The ceramic coating on the diaphragm of these

sensors should render the flash thermal effect

insignificant in most cases, especially when recessed

mounted.

However, if more protection from flash thermal

effects is required with the recessed mount, the

passage can be filled with silicone grease (DC-4 or

equivalent). Several layers of black vinyl electrical

tape directly on the diaphragm have proven effective

in many cases as well.

Flash temperature effects are usually longer term and

will show up as a baseline shift long after the event to

be measured has passed.

For flush mount installations, a silicone rubber

coating approximately 0.010 inch thick can be

effective; GE RTV type 106 is recommended, and is

available from PCB as Model 065A67. Follow

manufacturer’s instructions to apply. It is best to

recess the diaphragm 0.010 inch for this type of

protection.

3.6 INSTALLING CABLES

It is convenient, though not necessary, to use coaxial

cable, such as PCB 002 Series, to connect the

transducer to the power unit. Cable need not be low-

noise treated.

If the use of lighter, more flexible cable is desired,

PCB Model 070B09 solder connector adaptors may

be used to employ twisted pair or other types of two-

wire cable.

Drawing Number: 21113

Revision: A

OPERATION MANUAL FOR

ICP®HIGH PRESSURE SENSORS

Series 108 & 109

3.7 CIRCUIT CONNECTIONS

The figures below show two typical circuit

connections normally used to connect the 108 & 109

Series to power units.

The first figure is the connection scheme used for

most applications. In this set up, the signal is AC-

coupled from the bias voltage meaning the voltage at

the "scope" terminal will be at a zero volt bias level.

Normal Connection AC-Coupled Output

In this case, the system discharge time constant will

be determined by the input resistance and capacitance

of the power unit. Most PCB power units have

approximately a 10 second discharge time constant.

Alternate Connection to take Advantage of Sensor

Discharge TC

The second figure illustrates an optional connection

scheme which can be used during calibration to take

full advantage of the sensor’s discharge time constant.

With this arrangement, the readout is direct-coupled

to the sensor and the output signal will be added to

the DC bias voltage (11 VDC nominal).

The discharge time constant will then be determined

only by the sensor and should be in the order of 2000

seconds; this is sufficient for most types of static

calibration methods. (See Calibration Section 4.0)

Typical Connection

The figure above shows the 108 & 109 Series

connected to a PCB Model 484B06 power unit. The

484B06 is a power unit that can be AC or DC-

coupled.

In the DC-couple mode, a level-shifting circuit

removes the bias level and provides a zero adjust

feature at the front panel. The system’s discharge

time constant is determined by the sensor in this

mode.

An AC-coupled mode is provided for normal AC-

coupled operation.

4.0 CALIBRATION

PCB 108 & 109 Series sensors are supplied with a

calibration certification from the factory.

Recalibration services are provided at the factory for

a nominal fee.

Static calibration methods may be employed using the

set-up shown in the Alternate Connection figure or by

use of the Model 484B06 Power Unit as shown in the

figure above –use the 484B06 in DC mode.

Following thermal stabilization of the sensor, use a

high pressure pump with dial reference sensor or a

dead weight tester to apply pressure in desired

increments to full scale. Release pressure after taking

the reading and before proceeding to the next higher

pressure level.

With a 2000 second discharge time constant, 1% of

the signal will be lost in 20 seconds, so it is

imperative that the pressure setting and recording of

output be accomplished quickly.

A calibration graph can be plotted using output

voltage vs. input pressure to determine sensitivity and

linearity.

108 & 109

SERIES

002 SERIES

ICP®

POWER SUPPLY

READOUT

108 & 109

SERIES

ICP®

POWER SUPPLY

002 SERIES

READOUT

ICP®

POWER SUPPLY

SERIES 002

READOUT

108 & 109

SERIES

Drawing Number: 21113

Revision: A

OPERATION MANUAL FOR

ICP®HIGH PRESSURE SENSORS

Series 108 & 109

5.0 OPERATION

Select desired mode of circuit connection and turn

power unit on.

Observe fault monitor meter at the front panel of the

power unit.

Normal operation is indicated by an approximate

midscale reading. Shorted cable or connections are

indicated by a zero reading (red area).

Open cable or connections are indicated by a full-

scale (yellow area) reading.

Allow instrument several minutes to warm up and

thermally stabilize.

When output from the power unit is connected to

readout equipment, a drift in the voltage signal will

be noticed; this is normal. This voltage signal drift is

caused by the charging of the coupling capacitor in

the power unit and will cease within several minutes.

6.0 POLARITY

The 108 & 109 Series are designed to produce a

positive output voltage for increasing pressure at the

diaphragm.

7.0 MAINTENANCE

The small size and sealed construction of the 108 &

109 Series precludes field maintenance and repair.

Contact the factory for further assistance.

ICP®is a registered trademark of PCB Piezotronics

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