PCB Piezotronics ICP W112A21 User manual

Model W112A21
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: [phone]
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: [phone]
24-hour SensorLine: [phone]
General inquiries: in[email protected]
Repair inquiries: [e-mail]
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
O
O
O
O
O
O
PCB板
X
O
O
O
O
O
电气连接器
O
O
O
O
O
O
压电晶体
X
O
O
O
O
O
环氧
O
O
O
O
O
O
铁氟龙
O
O
O
O
O
O
电子
O
O
O
O
O
O
厚膜基板
O
O
X
O
O
O
电线
O
O
O
O
O
O
电缆
X
O
O
O
O
O
塑料
O
O
O
O
O
O
焊接
X
O
O
O
O
O
铜合金/黄铜
X
O
O
O
O
O
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
O
O
O
O
O
O
PCB Board
X
O
O
O
O
O
Electrical Connectors
O
O
O
O
O
O
Piezoelectric Crystals
X
O
O
O
O
O
Epoxy
O
O
O
O
O
O
Teflon
O
O
O
O
O
O
Electronics
O
O
O
O
O
O
Thick Film Substrate
O
O
X
O
O
O
Wires
O
O
O
O
O
O
Cables
X
O
O
O
O
O
Plastic
O
O
O
O
O
O
Solder
X
O
O
O
O
O
Copper Alloy/Brass
X
O
O
O
O
O
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: 21070
Revision: NR
OPERATION MANUAL FOR
ICP® PRESSURE SENSORS
Models 102A02, A05, A07, A09
Models 112A21, A22, A23
1
1.0 INTRODUCTION
The series of miniature pressure sensors described by
this operating guide is designed for low pressure, high
resolution applications and features acceleration
compensation.
Uses include monitoring of low pressure hydraulic
and pneumatic phenomena in the presence of shock
and vibration such as on jet engines, compressors,
turbines and other operating machinery, high intensity
sound and turbulence measurements, and many other
industrial R & D applications.
2.0 DESCRIPTION
This series is comprised of six sensor models having
high sensitivities, but differing in mechanical
configuration.
+
_
Intergrated
Circuit
Amplifier
Seal Ring
Potting
Connector
Electrodes
D
i
a
p
h
r
a
g
m
Housing 0.218 Dia
Quartz Plates
Mounting
Clamp Nut
Preload Sleeve
Typical ICPProbe Style Sensor
Each model utilizes the basic ICPpressure probe as
shown in above figure. The pressure probe consists of
the Model 112A high sensitivity acceleration-
compensated quartz element and an IC source
follower amplifier joined together as an inseparable
assembly.
Refer to "General Guide to ICPInstrumentation" G-
0001B for a complete treatment of the ICPconcept.
Models 112A21, 112A22 and 112A23 are in the
basic probe configuration as shown in Figure 1, and
are installed with a hollow clamp nut with 5/16-24
external threads. The housings of these models are at
electrical ground potential.
Series 111: Probe Style Sensor
The Model 102A05 utilizes the same basic pressure
probe, mounted in a 3/8-24 threaded mounting
adaptor with shoulder seal. The probe is assembled
into the adaptor at the factory in an "off ground"
configuration, i.e., the probe body is electrically
insulated from the external mounting adaptor body.
Do not attempt to disassemble probe and adaptor.
Model 102A05 Thread Mount Design, Ground-
Isolated Sensor

Drawing Number: 21070
Revision: NR
OPERATION MANUAL FOR
ICP® PRESSURE SENSORS
Models 102A02, A05, A07, A09
Models 112A21, A22, A23
2
Models 102A02, 102A07, and 102A09 utilize the
same inner probe design but in a 3/8-24 threaded
adaptor with floating clamp nut to allow adjustment
of diaphragm depth where it is necessary to adapt to
various wall thicknesses. These models are supplied
only in low pressure (100 and 50 psi) versions and
are also "off ground".
102A’s: Thread Mount with Floating Clamp Nut,
Ground-Isolated Sensor
3.0 INSTALLATION
This manual contains outline and installation
information for your specific model in this series.
Prepare mounting ports in accordance with the
installation drawing for the specific model, paying
particular attention to sealing surfaces. These
surfaces must be smooth and free from chatter marks,
nicks and other irregularities which could preclude a
pressure-tight seal.
Seals are provided with each sensor and should
always be used. Extra seals for all standard models
are in stock at the factory. Replace seals when they
become unserviceable.
In some cases, e.g., where flash temperatures such as
those generated by combustion processes are present,
it may be necessary to thermally insulate the
diaphragm to minimize spurious signals generated by
these effects.
Common black vinyl electrical tape has been found to
be an effective insulating material in many cases.
One or more layers may be used across the end of the
diaphragm without affecting response or sensitivity.
A silicone rubber coating approximately .010" thick
has also been proven effective in many applications.
General Electric RTV type 106 silicone rubber is
recommended. Apply the rubber coating and allow to
cure in accordance with the manufacturer's
instructions.
Although ICPsensors have low output impedance
and in general are not affected by moisture, in
extreme environments it is good practice to protect
cable connections with shrink tubing.
It is not necessary to use low-noise coaxial cable with
this sensor series. In fact, a Model 070A09 solder
connector adaptor that allows the use of ordinary two-
wire cable is desired.
4.0 OPERATION
It is only necessary to supply the sensor with a 2 to 20
mA constant current at +20 to +30 VDC through a
current-regulating diode or equivalent circuit. (See
Guide G-0001B for powering and signal utilization
information pertaining to all ICPinstrumentation).
Most of the signal conditioners manufactured by PCB
have an adjustable current feature allowing a choice
of input currents from 2 to 20 mA. In general, for
lowest noise (best resolution) choose the low current
ranges and for driving long cables (to several
thousand feet) use the higher current, up to 20 mA
maximum.
To operate system using a PCB signal conditioner:
1. Switch power on.
2. Wait several minutes for the IC amplifier to turn
on and stabilize.
3. Proceed with measurements.
4.1 OPERATINGCONSIDERATION
FOR MODEL 112A23
The Model 112A23 features a low-noise amplifier
which, based on a peak-to-peak broadband noise
factor of 50 V, results in a resolution of .001 psi.

Drawing Number: 21070
Revision: NR
OPERATION MANUAL FOR
ICP® PRESSURE SENSORS
Models 102A02, A05, A07, A09
Models 112A21, A22, A23
3
Defined for practical purposes as the minimum
readout signal, the resolution is based on the
sensitivity of 50 mV/psi and a low noise amplifier of
50 V peak noise.
Thus, 50 V/50mV = .001 psi resolution
The output bias voltage of the Model 112A23 is 5.0
volts, half the bias voltage of most PCB pressure
sensors. This will cause the bias monitor meter on
PCB power supplies to read at the low end of the
green band.
5.0 POLARITY
This sensor series produces a positive-going output
voltage for increasing pressure input.
6.0 LOW FREQUENCY RESPONSE
The low frequency response of an ICPsystem is
determined by:
1. The discharge time constant of the sensor,
and,
2. If AC-coupled at power unit, the coupling
time constant.
Consult Section 7.0 in Guide G-0001B for detailed
explanation of low frequency characteristics of ICP
instruments.
7.0 CALIBRATION
Piezoelectric sensors are dynamic devices, but static
calibration methods may be employed if discharge
time constants are sufficiently long. Generally, static
methods are not employed below several hundred
seconds discharge time constant.
To employ static methods, directly couple the sensor
to the DVM readout using a T-connector from the
XDCR jack or use the Model 484B in the "calibrate"
mode. Apply pressure with dead weight tester and
take readings quickly. Release pressure after each
calibration point.
For the shorter discharge time constant series, a rapid
pressure step must be generated by a pneumatic
pressure pulse calibrator or dead weight tester and
readout is by recorder or storage oscilloscope.
PCB offers a complete recalibration service. Consult
factory for details.

Drawing Number: 21070
Revision: NR
OPERATION MANUAL FOR
ICP® PRESSURE SENSORS
Models 102A02, A05, A07, A09
Models 112A21, A22, A23
4
8.0 MAINTENANCE
The miniature size sealed construction precludes field
maintenance. Should service be required, return unit
to factory with note describing problem.
ICP is a registered trademark of PCB Piezotronics

Model Number
112A21 ICP® PRESSURE SENSOR Revision: T
ECN #: 52524
Performance EN GLISH SI
Measurement Range(for ±5V output) 100 psi 690 kPa
Useful Overrange(for ± 10V output) 200 psi 1,380 kPa [1]
Sensitivity(± 10 mV/psi) 50 mV/psi 7.25 mV/kPa
Maximum Pressure(step) 1 kpsi 6,895 kPa
Maximum Pressure(Total) 15,000 psi 103,421 kPa
Resolution 2 mpsi 0.014 kPa
Resonant Frequency ≥ 250 kHz ≥ 250 kHz
Rise Time(Reflected) ≤ 2.0 µ sec ≤ 2.0 µ sec
Low Frequency Response(- 5 %) 0.5 Hz 0.5 Hz
Non-Linearity ≤ 1.0 % FS ≤ 1.0 % FS [2]
Environmental
Acceleration Sensitivity ≤ 0.002 psi/g ≤ 0.0014 kPa/(m/s²)
Temperature Range(Operating) -100 to +275 °F -73 to +135 °C
Temperature Coefficient of Sensitivity ≤ 0.06 %/°F ≤ 0.108 %/°C
Maximum Flash Temperature 3,000 °F 1,650 °C
Maximum Vibration 2,000 g pk 19,613 m/s² pk
Maximum Shock 20,000 g pk 196,133 m/s² pk
Electrical
Output Polarity(Positive Pressure) Positive Positive
Discharge Time Constant(at room temp) ≥ 1.0 sec ≥ 1.0 sec
Excitation Voltage 22 to 30 VDC 22 to 30 VDC
Constant Current Excitation 2 to 20 mA 2 to 20 mA
Output Impedance < 100 Ohm < 100 Ohm
Output Bias Voltage 8 to 14 VDC 8 to 14 VDC
Ph ysical
Sensing Geometry Compression Compression
Sensing Element Quartz Quartz
Housing Material 17-4 Stainless Steel 17-4 Stainless Steel
Diaphragm Invar Invar
Sealing Welded Hermetic Welded Hermetic
Electrical Connector 10-32 Coaxial Jack 10-32 Coaxial Jack
Weight(with clamp nut) 0.21 oz 6.0 gm
[3]
All specifications are at room temperature unless otherwise specified.
In the interest of constant product improvement, we reserve the right to change specifications without notice.
ICP® is a registered trademark of PCB Piezotronics, Inc.
E - Emralon coating [4]
Coating Emralon Emralon
Electrical Isolation 108 Ohm 108 Ohm
Supplied Accessory: Model 065A08 Isolation ring 0.250"OD x 0.218" ID x 0.027" thk anodized
aluminum (3)
Supplied Accessory: Model 065A22 Isolation Seal, .250" OD x .218" ID x .015", Torlon or Vespel (3)
J - Ground Isolated [4][5]
Electrical Isolation(50 V) 108 Ohm 108 Ohm
N - Negative Output Polarity [4]
S - Stainless Steel Diaphragm [4]
Diaphragm 316L Stainless Steel 316L Stainless Steel
W - Water Resistant Cable [4][6]
Supplied Accessory: Model 060A03 Clamp nut, 5/16-24-2A thd, 1/4" hex, stainless steel (1)
WM - Water Resistant Cable [4][6]
Supplied Accessory: Model 060A05 Clamp nut M7 x 0.75-6g thd (1)
OPTION AL VERSION S
Optional versions have identical specifications and accessories as listed for the standard model except
where noted below. More than one option may be used.
NOTES:
[1]For +10 volt output, minimum 24 VDC supply voltage required. Negative 10 volt output may be
limited by output bias.
[2]Zero-based, least-squares, straight line method.
[3]See PCB Declaration of Conformance PS023 for details.
[4]For sensor mounted in thread adaptor, see adaptor installation drawing for supplied accessories
and pressure limitations.
[5]Used with optional mounting adaptor.
[6]Clamp nut installed prior to cable attachment
Date: 02/01/2022 Date: 02/01/2022 Date: 02/01/2022 Date: 02/01/2022 112-1210-80
Entered: ND Engineer: MJK Sales: MV Approved: RPF Spec Number:
Phone: [phone]
Fax: [phone]
E-Mail: [e-mail]
3425 Walden Avenue, Depew, NY 14043
SUPPLIED ACCESSORIES:
Model 060A03 Clamp nut, 5/16-24-2A thd, 1/4" hex, stainless steel (1)
Model 060A05 Clamp nut M7 x 0.75-6g thd (1)
Model 065A02 Seal ring, sensor flush mount, 0.248" OD x 0.219" ID x 0.015" thk, brass (3)
Model 065A05 Seal sleeve sensor recess mount 0.248" OD x 0.221" ID x 0.240" thk 17-4 (1)