PCB Piezotronics IMI SENSORS 640B72 User manual

Model 640B72
4-20 mA Output Velocity Sensor
Installation and Operating Manual
For assistance with the operation of this product,
contact PCB Piezotronics, Inc.
Toll-free: 800-959-4464
24-hour SensorLine: 716-684-0001
Fax: [phone]
E-mail: [email protected]
Web: www.imi-sensors.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: [phone]
24-hour SensorLineSM: [phone]
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
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

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
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.

SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Model 640/641/645/646 B7 Series Industrial 4-20mA Sensor
Operating Guide with Enclosed Warranty Information
3425 Walden Avenue, Depew, New York 14043-2495
Phone [phone]
Fax [phone]
Toll Free Line 1-800-959-4IMI
MANUAL NUMBER: 28077
MANUAL REVISION: B
ECN NUMBER: 42851

PAGE 2
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Table of Contents
Introduction...................................................................................................................... Page 3
General Features
Dimension Drawing......................................................................................................... Page 4
Operation and Wiring ...................................................................................................... Page 5
Standard Wiring
Taking Measurements
RV Option
TO Option
EP Option
ESD Sensitivity............................................................................................................... Page 10
Warranty/Servicing
Warranty, Service & Return Procedure .......................................................................... Page 11
Customer Service........................................................................................................... Page 12

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SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Introduction
The Model 640/641/645/646 B7 Series Industrial 4-20mA Sensors combine the capabilities of a piezoelectric
vibration sensor and a 4-20mA vibration transmitter. The sensor outputs a 4-20mA signal that is proportional to
the overall velocity or acceleration of the machinery. Ideal for monitoring the vibration of process equipment such
as fans, motors and pumps, the output of the sensor is used for process control or predictive maintenance. There
are many options in this series. Please refer to specific specification sheets for further details.
General Features
Imbedded Piezoelectric Accelerometer for improved accuracy and frequency response.
Vibration range can be in Acceleration or Velocity.
Allows for continuous vibration monitoring of critical applications.
Reduces sophisticated vibration analysis requirements.
RV (Raw Vibration) option for conducting frequency analysis and machinery diagnostics.
TO (Temperature Output) option via an independent 4-20mA loop.
EP option includes an Explosion Proof capped elbow.
Readily interfaces to existing process control and predictive maintenance equipment.
Rugged stainless steel construction for applications in harsh environments.
Flexible design allows for various custom requirements.

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SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Dimension Drawing
Inch (mm)
1" NPT
2.57
1/4" NPT
MOUNTING THREAD
3.65
Ø1.500
1.375

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SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Operation and Wiring
Standard Wiring
The Model 640/641/645/646 B7 Series uses plug-in type screw terminal connectors for all input and output
connections and operate from a standard 2-wire, 4-20mA loop. Attach the positive (+) input from the power supply
to Pin 2 and the negative (-) input from the power supply to Pin 3.
Figure 1 –wiring: standard connection
Figure 2 –wiring: loop powered Figure 3 –wiring: loop powered/DC source
If using a standard DC power supply, install either an ammeter and/or load resistor in line with the return
connection Pin 3.
The resistor will generate a DC voltage that is proportional to current by:
V = IR
If R = 500  and I = 6mA, then V = 3Vdc
Note:

PAGE 6
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
- Resistor value must be less than: (Vsupply –12) x 50.
Taking Measurements
When measuring the current output from the unit, use the following formula to calculate the vibration level:
Vibration Output = (Measured Output –4mA) x (Full Scale Vibration Output /16mA)
Measured mA 640BX0 640BX1 640BX2
4.00 0.0 ips, pk 0.0 ips, pk 0.0 ips, pk
8.00 0.125 ips, pk 0.25 ips, pk 0.5 ips, pk
12.0 0.25 ips, pk 0.5 ips, pk 1.0 ips, pk
15.75 0.37 ips, pk 0.73 ips, pk 1.47 ips, pk
20 0.5 ips, pk 1.0 ips, pk 2.0 ips, pk
Measured mA 641BX0 641BX1 641BX2
4.00 0.0 ips, rms 0.0 ips, rms 0.0 ips, rms
8.00 0.125 ips, rms 0.25 ips, rms 0.5 ips, rms
12.0 0.25 ips, rms 0.5 ips, rms 1.0 ips, rms
15.75 0.37 ips, rms 0.73 ips, rms 1.47 ips, rms
20 0.5 ips, rms 1.0 ips, rms 2.0 ips, rms
Measured mA 645 646
4.00 0.0 g rms 0.0 g rms
8.00 1.25 g rms 2.50 g rms
12.0 2.50 g rms 5.00 g rms
15.75 3.67 g rms 7.34 g rms
20 5.00 g rms 10.0 g rms

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SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
RV Option
The RV (raw vibration) option includes a 100mV/g ±20% additional output. The accelerometer frequency range is
1 Hz-1 kHz, maximum amplitude of 15 g-pk. Data collectors or analyzers can use this vibration signal for further
analysis.
Figure 3 –RV wiring
Note:
-The Acceleration Signal Negative has to be isolated from any grounding. If this terminal is grounded, the 4-
20mA loop will short, causing no output.
-The acceleration output signal is ideally suited for use with portable battery powered data collectors or analyzers.

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SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
TO Option
The TO (Temperature Output) option includes an additional independent 4-20mA output for temperature
measurement. The temperature range is from -40°C to 125°C with an overall accuracy of ±5%FSO. The
imbedded temperature sensor monitors the environment internal to the sensor housing and is situated at
approximately mid level.
Figure 4 –TO wiring
Note:
- The same power supply can be used for both4-20mA loops. Connect both positive terminals directly to the
power supply, then use the negative terminals for independent process loops.

PAGE 9
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
EP Option
The EP option includes an Explosion Proof capped elbow for applications in rigid or IMC conduit systems where
space is limited and access is needed for pulling conductors or maintenance. Standard conduit hub size is 1”NPT.
Figure 5 –EP option
5.777
1.927
3.990
CAPPED ELBOW
3.850

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SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Warning 1 –ESD sensitivity
The power supply/signal conditioner should not be opened by anyone other than qualified service
personnel. This product is intended for use by qualified personnel who recognize shock hazards and are familiar
with the safety precautions required to avoid injury.
Warning 2 –ESD sensitivity
This equipment is designed with user safety in mind; however, the protection provided by the equipment may be
impaired if the equipment is used in a manner not specified by PCB Piezotronics, Inc.
Caution 1 –ESD sensitivity
Cables can kill your equipment. High voltage electrostatic discharge (ESD) can damage electrical devices.
Similar to a capacitor, a cable can hold a charge caused by triboelectric transfer, such as that which occurs in the
following:
Laying on and moving across a rug,
Any movement through air,
The action of rolling out a cable, and/or
Contact with a non-grounded person.
The PCB solution for product safety:
Connect the cables only with the AC power off.
Temporarily “short” the end of the cable before attaching it to any signal input or output.
Caution 2 –ESD sensitivity
ESD considerations should be made prior to performing any internal adjustments on the equipment. Any
piece of electronic equipment is vulnerable to ESD when opened for adjustments. Internal adjustments should
therefore be done ONLY at an ESD-safe work area. Many products have ESD protection, but the level of
protection may be exceeded by extremely high voltage.

PAGE 11
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Warranty
IMI instrumentation is warranted against defective material and workmanship for 1 year unless otherwise
expressly specified. Damage to instruments caused by incorrect power or misapplication, is not covered by
warranty. If there are any questions regarding power, intended application, or general usage, please consult with
your local sales contact or distributor. Batteries and other expendable hardware items are not covered by
warranty.
Service
Because of the sophisticated nature of IMI instrumentation, field repair is typically NOT recommended and may
void any warranty. If factory service is required, return the instrumentation according to the “Return Procedure”
stated below. A repair and/or replacement quotation will be provided prior to servicing at no charge. Before
returning the unit, please consult a factory IMI applications engineer concerning the situation as certain problems
can often be corrected with simple on-site procedures.
Return procedure
To expedite returned instrumentation, contact a factory IMI applications engineer for a RETURN MATERIAL
AUTHORIZATION (RMA) NUMBER. Please have information available such as model and serial number. Also,
to insure efficient service, provide a written description of the symptoms and problems with the equipment to a
local sales representative or distributor, or contact IMI if none are located in your area.
Customers outside the U.S. should consult their local IMI distributor for information on returning equipment. For
exceptions, please contact the International Sales department at IMI to request shipping instructions and an RMA.
For assistance, please call [phone], or fax us at [phone]. You may also receive assistance via e-
mail at [e-mail] or visit our web site at www.pcb.com.

PAGE 12
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Customer Service
IMI, a division of PCB Piezotronics, guarantees Total Customer Satisfaction. If, at any time, for any reason, you
are not completely satisfied with any IMI product, IMI will repair, replace, or exchange it at no charge. You may
also choose to have your purchase price refunded.
IMI offers to all customers, at no charge, 24-hour phone support. This service makes product or application
support available to our customers, day or night, seven days a week. When unforeseen problems or emergency
situations arise, call the IMI Hot Line at [phone], and an application specialist will assist you.
3425 Walden Avenue, Depew, NY 14043-2495
Phone: [phone]  USA Fax: [phone]  INTL Fax: [phone]
ICP®is a registered trademark of PCB Group, Incorporated,
which uniquely identifies PCB sensors that incorporate built-in microelectronics.