PCB Piezotronics IMI SENSORS 642A10/034BZ User manual

Model 642A10/034BZ
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.
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: [phone]
24-hour SensorLineSM: [phone]
Website: www.pcb.com
E-mail: [email protected]
DOCUMENT NUMBER: 21354
DOCUMENT REVISION: B
ECN: 17900

SENSOR
S AND INSTRUMENTATIO
N FOR MACHINE CONDIT
ION MONITORING
Model 642/643/647/648 A 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: 25778
MANUAL REVISION: C
ECN NUMBER: xxxxx

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SENSORS AND INSTRUME
NTATION 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
Installation........................................................................................................................ Page 9
ESD Sensitivity.............................................................................................................. Page 10
Warranty/Servicing
Warranty, Service & Return Procedure.......................................................................... Page 11
Customer Service.......................................................................................................... Page 12

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SENSORS AND INSTRUME
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CONDITION MONITORING
Introduction
The Model 642/643/647/648 A 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.
 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.
 Swivel mount simplifies installation.
 Cable may be positioned in any direction.

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SENSORS AND INSTRUME
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CONDITION MONITORING
Dimension Drawing
1.05
[26.7]
PIN B:
NEGATIVE
4-20 mA
PIN A:
POSITIVE
4-20 mA
1/8" HEX ALLEN
KEY REQUIRED
MOUNTING STUD
MODEL 080A162
(SUPPLIED) 1/4-28 UNF-2A
3/4-16 UNF-2A
1.41
[35.8] 7/8 (22) HEX
1.98[45.7]
1.24
[ 31.5]
ELECTRICAL CONNECTOR
5/8-24 UNEF-2A
2 - PIN (MIL-C-5015)
Inch (mm)

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SENSORS AND INSTRUME
NTATION FOR MACHINE
CONDITION MONITORING
Operation and Wiring
Standard Wiring
The Model 642/643/647/648 A Series operates from a standard 2-wire, 4-20mA loop. If using a loop powered
unit, attach the positive (+) input from the power supply to Pin A or Red wire on the sensor and the negative (-)
input from the power supply to Pin B or Blue wire of the sensor.
Figure 1 –wiring: loop powered Figure 2 –wiring: loop powered/DC source
If using a standard DC power supply, install either an ammeter and/or load resistor in line with the output, Pin B or
Blue wire.
The resistor will generate a DC voltage that is proportional to current by:
V
IR

If R ohms and I mA thenV VDC



500 6 3,
Note:
- Resistor value must be less than: (Vsupply –12) x 50.
- For integral cable sensors: RED wire is positive, BLUE wire is negative.

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SENSORS AND INSTRUME
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CONDITION MONITORING
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 642AX0 642AX1 642AX2
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 643AX0 643AX1 643AX2
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 647 648
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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CONDITION MONITORING
RV Option
The RV (raw vibration) option includes a 100mV/g ±20% additional output. The accelerometer frequency range is
1 Hz-10 kHz, maximum amplitude of 15 g-pk. Data collectors or analyzers can use this vibration signal for further
analysis.
Figure 3 –RV wiring
For integral cable sensors:
RED 4-20mA Positive
BLACK 4-20mA Negative (same as green)
GREEN -RV Acceleration Negative (same as black)
WHITE +RV Acceleration Positive
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.