JSR Ultrasonics DPR500 User manual

DPR500 Dual Pulser-Receiver
Operator Manual
Manual Version 2.2.0
February, 2011
www.JSRUltrasonics.com
Copyright ©2006-2011 Imaginant Inc. All Rights Reserved
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DPR500 Dual Pulser-Receiver
Table of Contents
DPR500 Dual Pulser-Receiver............................................................................. 1
Table of Contents ................................................................................................. 2
Fuse, Safety, and Technical Support Information................................................. 4
Fuse Information..................................................................................................................................................4
Safety .....................................................................................................................................................................4
Technical Support ................................................................................................................................................4
Warranty Agreement............................................................................................. 5
Instrument Limited Warranty............................................................................................................................5
Software Limited Warranty................................................................................................................................5
Application Disclaimer.........................................................................................................................................5
General Description.............................................................................................. 6
Description ............................................................................................................................................................6
Physical..................................................................................................................................................................6
Theory of Operation.............................................................................................. 7
DPR500 System Blocks and Their Functions.....................................................................................................7
JSR Control Panel Software...............................................................................................................................7
Digital Control Logic and RS-232 Interface ......................................................................................................8
High Voltage Power Supply...............................................................................................................................8
Pulser (Impedance / Energy / Damping) ...........................................................................................................8
Pulser Trigger Control........................................................................................................................................8
PRF Oscillator....................................................................................................................................................8
Receiver Amplifier/Attenuator...........................................................................................................................8
Low Pass Filters .................................................................................................................................................8
High Pass Filters.................................................................................................................................................8
Power Switch, Indicators, and Connectors........................................................... 9
Main Power Switch ............................................................................................................................................9
Power Indicator LED (Power)............................................................................................................................9
Pulse Indicator LEDs (Pulse) ............................................................................................................................9
DPR500 Rear Panel Connectors.......................................................................................................................10
CHA/CHB Remote Pulser Connector ..............................................................................................................10
CHA/CHB Receiver Output Connector (Receiver Output).............................................................................10
CHA/CHB Trig / Sync Connector....................................................................................................................10
RS-232 Interface Connectors ...........................................................................................................................11
AC Input Receptacle.........................................................................................................................................11
Instrument Setup ................................................................................................ 12
System Components ...........................................................................................................................................12
Host Computer Requirements...........................................................................................................................12
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DPR500 Dual Pulser-Receiver
Ventilation...........................................................................................................................................................12
Mains Disconnect................................................................................................................................................12
Earth Ground .....................................................................................................................................................12
System Configuration.........................................................................................................................................13
Operation............................................................................................................ 14
Pulse-Echo Mode Operation..............................................................................................................................14
Transmission Mode Operation..........................................................................................................................15
Operating the DPR500.......................................................................................................................................16
Remote Operation of the DPR500...................................................................... 17
Overview of Remote Operation.........................................................................................................................17
JSR Control Panel graphical user interface.....................................................................................................18
JSR Common SDK (Software Development Kit) ............................................................................................19
JSR Simple ActiveX object................................................................................................................................20
Remote PC control via serial port commands .................................................................................................20
COM Port Configuration...................................................................................................................................20
DPR500 Service................................................................................................. 21
Serviceable Parts ................................................................................................................................................21
Fusing ..................................................................................................................................................................21
Fuse Replacement...............................................................................................................................................21
Voltage Selection.................................................................................................................................................22
Appendix A ......................................................................................................... 23
DPR500 Specifications....................................................................................... 23
Pulser...................................................................................................................................................................23
Receiver...............................................................................................................................................................23
PC or Compatible Control Computer..............................................................................................................24
Environmental Conditions.................................................................................................................................24
Miscellaneous......................................................................................................................................................24
Appendix B ......................................................................................................... 25
Pulser-Receiver Configuration File Specification................................................ 25
Introduction........................................................................................................................................................25
Configuration File Overview.............................................................................................................................25
Example Configuration Files.............................................................................................................................27
General Configuration File Arrangement........................................................................................................28
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DPR500 Dual Pulser-Receiver
Fuse, Safety, and Technical Support Information
Fuse Information
The DPR500 utilizes .4A 250V 3AG-type slow-blow glass-cartridge fuses.
Warning: Fire Hazard. Replace fuses only with fuses of the same type and rating.
Warning: Shock hazard. Disconnect electric power before replacing fuses. Follow Fuse Replacement
procedure found in Section 8 of this manual.
Safety
There are no user serviceable parts in the DPR500, other than the fuse.
DPR500 units should be returned to the manufacturer for any repair.
If the DPR500 is not used as prescribed by the manufacturer, the overall
safety may be impaired.
Ensure that the power cord is appropriate before connecting the DPR500 to
mains power. Use a power cord rated for the mains voltage, preferably a
power cord supplied by the equipment manufacturer or authorized agent.
Technical Support
The answers to most questions regarding the use of the equipment are contained in this manual. Please use this as
your first source of information. If you cannot find an answer in this manual, please contact technical support at
Imaginant.
Imaginant Inc.
3800 Monroe Ave.
Pittsford, NY 14534
Voice: [phone]
Fax: [phone]
E-mail: [email protected]
Please have the following information available before contacting Technical Support:
Model number (i.e.: RP-H2) and Serial number (i.e.: GF0101)
Specific nature of the problem
Technical support is available Monday through Friday from 8:00AM to 5:00PM EST.
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DPR500 Dual Pulser-Receiver
Warranty Agreement
Instrument Limited Warranty
Imaginant Inc. warrants that its instruments will be free from defects in materials and workmanship for a
period of one year from the date of purchase. IMAGINANT will, at its option, repair or replace any of its
products, which prove to be defective during the warranty period without charge for parts and labor.
To obtain service under this warranty, the Customer must obtain a Return Material Authorization (RMA)
number from IMAGINANT before shipping the product to Imaginant with the shipping charges prepaid.
The Customer is responsible for packaging the product, preferably in the original packaging materials.
This warranty does not apply to any defect, failure, or damage caused by improper usage, handling, care,
or tampering. Neither will this warranty apply to any equipment damaged from attempts by personnel
other than Imaginant to repair or modify the product.
Imaginant disclaims any warranty, either express or implied, as to the applicability or fitness of its
hardware or software for a particular purpose or application. Imaginant will not be liable for any indirect,
incidental, or consequential damages related to the use of its’ products irrespective of whether Imaginant
received any advance notice of the possibility of such damages.
Software Limited Warranty
Imaginant Inc. warrants for a period of 120 days from the date of delivery, that its instrument software
will perform under normal usage and without unauthorized modification substantially in accordance with
the specifications published in the documentation and those set forth in Imaginant advertising material;
that, under normal use, the media upon which this program is recorded is not defective; and that the user
documentation is substantially complete and contains the information Imaginant deems necessary for
using its software. If, during the 120 day warranty period, a demonstrable defect in the program or
documentation should appear, Imaginant will repair or replace the software with functionally equivalent
software within 30 days after Imaginant has been notified of such a defect.
Imaginant disclaims any warranty, either express or implied, as to the applicability or fitness of its
software for a particular purpose or application. Imaginant will not be liable for any indirect, incidental,
or consequential damages related to the use of its products irrespective of whether Imaginant received any
advance notice of the possibility of such damages.
Application Disclaimer
This product is not intended or designed for use in medical or other devices or systems where malfunction
of this product can reasonably be expected to result in personal injury. Imaginant customers using or
selling this product for use in such applications do so at their own risk and agree to fully indemnify
Imaginant against any damages resulting from such improper use or sale.
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DPR500 Dual Pulser-Receiver
General Description
Description
The DPR500 Dual Pulser-Receiver is a modular instrument consisting of two Pulser-Receiver systems in
one unit. It is designed to operate under the control of a computer. A software program is provided which
allows the user to exercise all instrument functions under the control of a PC or compatible computer.
Alternatively, programming information supplied in this manual allows the user to develop custom
software programs that control the DPR500.
In a typical application, the DPR500 produces a high voltage electrical excitation pulse on the remote
pulser’s ECHO connector. Two discrete pulse energy levels are available for adjusting the strength of
this excitation pulse. The type of pulser chosen determines the shape of the pulse. An ultrasonic
transducer is connected to the ECHO connector via a short length of 50Ωcoaxial cable, and the
transducer converts energy from the electrical excitation pulse into an ultrasonic pulse that is propagated
into a test material or medium. Four discrete damping levels in the DPR500 allow the transducer response
to be fine-tuned.
With the DPR500 configured for pulse-echo mode of operation, any acoustic echoes reflected from
interfaces or from defects within the test material are converted by the transducer into electrical signals to
be processed by the DPR500 receiver. These electrical signals are amplified by the preamp in the pulser
and then subsequently amplified by the low noise receiver. The signals pass through adjustable high pass
and low pass filters and an adjustable gain stage. The DPR500 receiver gain range, bandwidth and filter
values are dependant on the type of receiver purchased. The amplified and filtered signals are available on
the instrument’s Receiver Output connector.
The DPR500 may also be used in transmission mode operation wherein a separate receiving transducer is
used to detect acoustic pulses that have propagated through the test material or medium. This second
transducer is connected to the DPR500 remote pulser THROUGH connector, and the received signals are
processed as described above for pulse-echo mode operation.
The DPR500 also allows external equipment such as A/D digitizer boards or oscilloscopes to be
synchronized to the pulser operation. To facilitate this, a narrow pulse is output on the synchronization
(Trig/Sync.) connector simultaneously with generation of the excitation pulse when the instrument is
configured in Internal Trigger Mode.
Physical
The DPR500 ultrasonic dual Pulser-Receiver system consists of an enclosure with dimensions 12” deep,
8.25” wide, and 3.5” high. This enclosure contains the receiver(s), power supplies and controls for the
pulser(s). The pulsers range in size from 2” x 3” x 1.2” to 2” x 3” x 1.52”.
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DPR500 Dual Pulser-Receiver
Theory of Operation
DPR500 System Blocks and Their Functions
The DPR500 dual Pulser-Receiver is composed of the functional blocks shown in the figure below. The
main unit includes the digital control logic and RS-232 interface, high voltage power supply(s), pulser
trigger select, PRF oscillator, receiver amplifier(s), receiver low pass filters, and receiver high pass filters.
The remote pulser(s) includes the pulser, echo/through select and a pre-amplifier. Instrument control
software resides in the remote computer and controls the instrument via the RS-232 serial interface.
DPR500 System Block Diagram
Receiver A
Receiver B
High Voltage
Power Supply
High Voltage
Power Supply
Amplifier/
Attenuator
Amplifier/
Attenuator
Low Pass
Filter
Low Pass
Filter
High Pass
Filter
High Pass
Filter
PRF
Oscillator
Digital
Control
Logic
RS232
Interface
Bus
Amplifier
Through
Echo
Pulser
(Energy and
Damping)
Pulser B
Pulser A
Amplifier
Echo-
Through
Select
Echo
Through
Pulser
(Energy and
Damping)
Channel B
Receiver Output
50 Ohms
Channel A
Receiver Output
50 Ohms
CHA
TRIG/SYNC
CHB
TRIG/SYNC
Echo-
Through
Select
JSR Control Panel Software
Software enables a user to remotely control the DPR500 from a computer. In addition to the
control program provided with the DPR500, information is provided in this manual for users that
wish to develop custom instrument control programs.
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DPR500 Dual Pulser-Receiver
Digital Control Logic and RS-232 Interface
The interface and control logic enables the control of the DPR500 from software running on the
host computer. Communication is via an RS-232 interface such as the COM1 or COM2 ports on
the remote computer.
High Voltage Power Supply
The precision regulated high voltage supply provides power to the pulser. The DPR500 pulser
maintains constant pulse amplitude regardless of changes in either the pulse repetition rate or
other instrument controls.
Pulser (Impedance / Energy / Damping)
The pulser generates an excitation pulse upon receipt of a trigger event from a selected source.
Pulse energy can be controlled by the Energy control. There may be multiple energy values
depending on the type of remote pulser selected. The damping control allows the damping
impedance at the pulser output to be set to discrete values allowed by the remote pulser.
Pulser Trigger Control
This control selects between the internal PRF oscillator or an external source applied to the
Trig/Sync connector as trigger sources for the DPR500 remote pulser.
PRF Oscillator
Generates repetitive trigger pulses for the remote pulser.
Receiver Amplifier/Attenuator
Controls the amplification or attenuation of signals processed by the DPR500 receiver. The
receiver gain is dependent on the type of receiver chosen.
Low Pass Filters
These filters are available for reducing the bandwidth of the DPR500 receiver. Bandwidth
limiting can be used to improve the signal to noise ratio for applications that do not require the
full receiver bandwidth.
High Pass Filters
These filters are available for eliminating undesirable low frequency energy from the DPR500
receiver signal. High pass filtering can be used as a means of providing faster receiver recovery
from strong signals such as the excitation pulse or strong interface echoes.
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DPR500 Dual Pulser-Receiver
Power Switch, Indicators, and Connectors
In this section, the DPR500 Dual Pulser-Receiver controls, indicators, and connectors are described. The diagram
below shows the locations of the DPR500 front panel power switch and indicators.
CH A
PULSEPOWER
CH B
PULSE
DPR500 Front Panel
Power
Indicator
LED CHB Pulse
Indicator LED
CHA Pulse
Indicator LED
Main Power
Switch
Main Power Switch
This toggle switch is used for turning on/off power to the DPR500.
Power Indicator LED (Power)
This amber-colored LED illuminates to indicate that power is applied to the DPR500. This LED can also
be made to blink at a controlled rate by the ‘Blink’ command described in Section 7.
Pulse Indicator LEDs (Pulse)
These are red LED indicators that illuminate when their respective pulsers are firing.
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DPR500 Dual Pulser-Receiver
DPR500 Rear Panel Connectors
The diagram below shows the positions of the connectors on the DPR500 rear panel.
DPR500 Rear Panel Connectors
CHA/CHB Remote Pulser Connector
These modular connectors supply power, digital control, high voltage and a 50Ωreturn path for signals.
CHA/CHB Receiver Output Connector (Receiver Output)
These are SMB receptacles on which output signals from the DPR500 receiver are available. This output
signal line should be terminated with a 50Ωload.
CHA/CHB Trig / Sync Connector
This connector provides a positive polarity sync pulse signal that can be used to trigger an oscilloscope or
other signal monitoring/recording instrument when the DPR500 internal oscillator is used to trigger the
pulser. In this mode, the signal line should be terminated with a 50Ωload.
If the DPR500 pulser is in external trigger mode, then the Trig / Sync connector is used for receiving a
positive-going 3-5 V external trigger pulse. Triggering will occur on the rising edge of the trigger pulse.
When triggering the DPR500 pulser from an external source or under software control, it is important to
ensure that the pulse repetition frequency does not exceed the maximum PRF rate of the chosen pulser.
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