PCB Piezotronics M119B12 User manual

Model M119B12
Charge Output 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: 21110
Revision: B
OPERATION MANUAL FOR
QUARTZ PRESSURE SENSOR
Series 118 & 119
1
1.0 INTRODUCTION
The 118 & 119 Series are acceleration-compensated,
high pressure 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 118B1X
and 119B1X utilize a floating clamp-nut design to
reduce the effects, where “X” denotes pressure range.
2.0 DESCRIPTION
The 118 & 119 Series contain an acceleration-
compensated piezo element. 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.
3.0 INSTALLATION
With a 3/8-24 (M10x1.0 for metric mount) mounting
thread and flush diaphragm design, the 118 & 119
Series transducers mount directly in existing ports
machined for PCB Series 108 & 109.
Unlike conventional diaphragm type sensors, the 118
& 119 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).
Existing Recessed Ports
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.
If waveform distortion occurs during prolonged
testing, remove the sensor and clean the residue as
illustrated above.
5/16 HEX
10-32 COAXIAL
CONNECTOR
3/8-24 THREAD
CERAMIC COATING
QUARTZ ELEMENT
MODEL 040A
REAMER
MODEL 041A
PILOT BUSHING

Drawing Number: 21110
Revision: B
OPERATION MANUAL FOR
QUARTZ PRESSURE SENSOR
Series 118 & 119
2
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)
L4
V
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:
L
0033
fr
(EQ. 2)
Where: L = Passage length (in)
0.010
MIN

Drawing Number: 21110
Revision: B
OPERATION MANUAL FOR
QUARTZ PRESSURE SENSOR
Series 118 & 119
3
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 (uSec)
.050
66
5
.100
33
10
.200
16.5
20
.50
6.6
50
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
Use only low-noise treated coaxial cable, such as
PCB 003 Series, to connect the sensor to the charge
amplifier, in-line voltage amplifier, or other high
input impedance readout instrument. To protect the
high impedance connection against moisture and
contamination, shrink tubing or other equivalent
connection protection is recommended. See the
following page for typical circuit connections.
Excessive cable motion can generate noise and
shorten cable life. For this reason, it is important to
support sensor cables by tying them to rigid structures
with adequate strain relief loops.
4.0 CALIBRATION
PCB 118 & 119 Series sensors are supplied with a
calibration certification from the factory.
Recalibration services are provided at the factory for
a nominal fee.
Several charge amplifiers are specially designed for
use with ceramic accelerometers measuring higher
frequencies. In general, this type of charge amplifier
is not suitable for calibration of quartz pressure
sensors by quasi-static means.
Do not attempt to use a charge amplifier which has
less than a 5000 second time constant in the “long
time constant” 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.
A calibration graph can be plotted using output
voltage vs. input pressure to determine sensitivity and
linearity.

Drawing Number: 21110
Revision: B
OPERATION MANUAL FOR
QUARTZ PRESSURE SENSOR
Series 118 & 119
4
5.0 OPERATION
Most test set-ups will include 118 & 119 Series
sensors coupled with charge amplifiers, as shown in
the Typical Connection figure below. For
applications where the location of the measurement is
a long distance from where the data must be read, an
in-line amplifier can be used to drive the signal. This
configuration reduces the amount of noise in the data
and can be seen in the Long Distance Connection
figure to the right.
It is important to keep the charge amplifier input
cable as short as practical. Input cable capacitance is
directly related to cable length and is a major factor
in the amount of electrical noise at the output of any
charge amplifier.
Depress the ground button of the charge amplifier and
adjust electrical zero if necessary. Range the
amplifier as required to give the necessary full-scale
voltage.
For normal, drift-free operation, switch the charge
amplifier time constant selector to “medium” or
“short” during use.
Typical Connection
6.0 POLARITY
Since most charge amplifiers are inverting the input
signal, 118 & 119 Series are designed to produce a
negative output voltage for increasing pressure at the
diaphragm.
Special positive output versions are available for use
with our non-inverting ICP®source follower
amplifiers.
ICP®is a registered trademark of PCB Piezotronics
Long Distance Connection
7.0 MAINTENANCE
Regular inspection of the diaphragm, threads, and
connector of the 118 & 119 Series sensors is good
practice.
During use in damp environments or after a period of
storage, the insulation resistance of these sensors may
degrade (1012 ohms is normal). The only maintenance
required on the 118 & 119 Series is cleaning of the
connector to restore insulation resistance.
To restore insulation resistance, wipe the connector
end with a clean cloth or paper towel dipped in
Lenium®or an equivalent solvent, then rinse in
isopropyl alcohol. The sensor should then be placed
in a 250F (120C) oven for several hours. A
vacuum oven, if available, will speed the process.
Contact the factory for further assistance if the
insulation resistance cannot be restored.
IN-LINE
AMPLIFIER
118 & 119
SERIES
LOW-NOISE CABLE
ICP®
POWER SUPPLY
READOUT
COAXIAL
CABLE
118 & 119
SERIES
READOUT
LOW-NOISE CABLE
CHARGE
AMPLIFIER
COAXIAL
CABLE