US Ultratek USB-UT350M8 User manual

Brand: US Ultratek

Model: USB-UT350M8

Type: User manual

This manual is also suitable for

USB-UT350(T)

Portable Ultrasonic Pulser/Receiver and

Analog to Digital Converter

User’s Guide

US Ultratek, Inc.

4070 Nelson Ave., Suite B

Concord, CA 94520 USA

Tel: (925) 687-7688

Fax: (925) 687-7689

E-Mail: [email protected]m

Web: http://www.USUltratek.com

USB-UT350 User’s Guide

Revision 1.77 – 09/30/2009

1 INTRODUCTION............................................................................................................................ 1-1

1.1 FEATURES ................................................................................................................................. 1-1

1.2 SYSTEM REQUIREMENTS ........................................................................................................... 1-1

2 INSTALLATION............................................................................................................................. 2-1

2.1 SOFTWARE INSTALLATION ........................................................................................................ 2-1

2.2 HARDWARE CONNECTIONS ....................................................................................................... 2-2

2.3 TESTING THE USB-UT350 ........................................................................................................ 2-2

3 APPLICATIONS ............................................................................................................................. 3-1

4 PARAMETERS ............................................................................................................................... 4-1

4.1 PULSE POWER ........................................................................................................................... 4-1

4.2 PULSE WIDTH / CYCLES ............................................................................................................ 4-1

4.3 GAIN ......................................................................................................................................... 4-1

4.4 FREQUENCY (TONE BURST PULSER ONLY) ............................................................................... 4-1

4.5 DC OFFSET ............................................................................................................................... 4-2

4.6 BUFFER LENGTH ....................................................................................................................... 4-2

4.7 TRIGGER DELAY ....................................................................................................................... 4-2

4.8 AVERAGE .................................................................................................................................. 4-2

4.9 POLARITY (TONE BURST PULSER ONLY) .................................................................................. 4-2

4.10 SIGNAL TYPE ............................................................................................................................ 4-2

4.11 TRIGGER TYPE .......................................................................................................................... 4-3

4.12 SAMPLING RATE ....................................................................................................................... 4-3

4.13 LPF (LOW PASS FILTER) ........................................................................................................... 4-3

4.14 HPF (HIGH PASS FILTER).......................................................................................................... 4-3

5 TOOLS.............................................................................................................................................. 5-1

5.1 FAST FOURIER TRANSFORM (FFT)............................................................................................ 5-1

6 HARDWARE CONFIGURATION................................................................................................ 6-2

6.1 DB-25 CONNECTOR .................................................................................................................. 6-2

7 TROUBLESHOOTING .................................................................................................................. 7-1

8 SPECIFICATIONS.......................................................................................................................... 8-1

USB-UT350 User’s Guide

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1-1

1 Introduction

The USB-UT350 is the base model of a portable ultrasonic pulser/receiver and analog to

digital converter that can be used for a multitude of applications such as flaw detection,

thickness measurement, Doppler measurement, and flow meter. The following list shows

the other products of this series:

USB-UT350T is the tone burst version of the pulser/receiver. The letter T at the end of

the part number stands for tone burst pulser.

USB-UT350M16(T), USB-UT350M8(T) and USB-UT350M4(T) are the instruments

with 16, 8, and 4 channels respectively.

USB-UT350RT is a relay switching instrument with 16 channels. It is the lowest cost

device with so many channels.

1.1 Features

 Adjustable high pulse voltage up to 300V (350V optional)

 Adjustable pulse width up to 500 ns

 Low noise receiver

 Low noise pulser

 High speed analog to digital conversion up to 50MHz

 Time or position based acquisition

 Tone burst pulser version available

 Battery monitoring option available

 Oscilloscope software included

 Software development kit (SDK) for C/C++, Visual BASIC or LabVIEW

available

1.2 System Requirements

The USB-UT350 is designed to operate on any laptop or desktop system running

Windows 2000 (w/SP4) or Windows XP. For standalone operation the device must be

configured using such a system and will then operate independently.

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2 Installation

The supplied software should be installed prior to connecting the USB-UT350 to the

computer.

2.1 Software Installation

Simply insert the disc labeled ‘USB-UT Software and Driver Disc’ and you will be

presented with the following:

Select next and follow the prompts to complete the installation. It is recommended that

the default directory be used.

If you have purchased additional software such as an SDK or the UT Instrument

Software, you may installation those programs after the USB-UT Software and Drivers

installation has completed.

Once you have finished installing the software, it will be accessible through the start

menu.

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2.2 Hardware Connections

1. Connect the transducer(s) to the USB-UT 350. Select Single or Dual mode using

the switch located beneath the BNC connectors for the old model. For the new

model the single and dual mode can select using the scope software.

2. Connect the USB 2.0 cable to the USB-UT 350 and your computer.

2.3 Testing the USB-UT350

The USB-UT350 comes with oscilloscope software that enables the user to interact with

the device. Launch the oscilloscope software and view the waveform to ensure that the

software and drivers have been installed correctly.

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3 Applications

The USB-UT350 ultrasonic pulser/receiver and analog to digital converter can be used

for a variety of applications.

The device emits a negative high voltage pulse (or a series of tone burst pulses if the tone

burst pulser is installed) on the TX connector and receives the response signal through

either the TX connector or the RX connector depending on whether the device is in

pulse/echo or through transmission mode. The receiver clips off the high voltage portion

of the signal and performs amplification, filtration, and DC offset adjustment. The clean

signal is then digitized and available for analysis.

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4 Parameters

4.1 Pulse Power

Pulse power ranges from -40V to -300V peak to peak in 256 steps. The response echoes

are stronger when a higher voltage is used, however some transducers become saturated

and require lower voltage settings.

4.2 Pulse Width / Cycles

For the Standard Pulser:

The pulse width can be set to any value between 50ns and 500ns in increments of 20ns.

The pulse width has a close relationship with the frequency of the transducer which is

represented in the following formula:

fW /500

Where W is the pulse width in ns and ft is the transducer frequency in MHz.

For example, if you have a 5MHz transducer, the appropriate pulse width would be

calculated as follows:

nsfW t1005/500/500

For the Tone Burst Pulser:

The number of cycles corresponds to how many oscillations the pulse will emit. This

number defines the half-cycles of the period. A value of 4 will result in two complete

cycles – positive, negative, positive, negative when the polarity is positive or the reverse

when the polarity is negative.

4.3 Gain

Gain is used to control the amplitude of the signal. It ranges from -20dB to 80 dB in

increments of 0.01dB. Adjust the gain until the signal fits in the display window without

any saturation.

4.4 Frequency (Tone Burst Pulser Only)

Sets the frequency of the tone burst pulser.

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4.5 DC Offset

Sets the DC offset of the signal.

4.6 Buffer Length

The buffer length specifies how many samples the USB-UT350 will analyze during data

acquisition. This value can be anywhere between 2 and 8191 samples, or 1 to 32000 with

32K memory option.

4.7 Trigger Delay

The trigger delay specifies how many samples the A/D converter should skip before

processing the response signal. This value can be anywhere between 0 and 16,383

samples.

4.8 Average

Sets the signal averaging. The device will take multiple waveforms and then average

them.

4.9 Polarity (Tone Burst Pulser Only)

Sets the polarity of the tone burst pulser. Positive polarity starts the oscillation with a

positive pulse while negative polarity starts the oscillation with a negative pulse.

4.10 Signal Type

There are four types of signal available:

Signal Type Application

Full Full wave rectification Flaw detection

+Half Positive half rectification Thickness measurement

-Half Negative half rectification Thickness measurement

RF No rectification Thickness measurement

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4.11 Trigger Type

There are three types of triggers available:

Trigger Type

+External External trigger on the rising edge.

Software Internal software trigger.

-External External trigger on the falling edge.

4.12 Sampling Rate

The following sampling rates are supported by the USB-UT350:

50 MHz

25 MHz

12.5 MHz

6.25 MHz

The sampling rate should be 5 to 8 times greater than the transducer frequency.

4.13 LPF (Low Pass Filter)

The low pass filter enables digital filtering of the signal. Only frequencies below this

frequency will be included in the signal.

4.14 HPF (High Pass Filter)

The high pass filter enables digital filtering of the signal. Only frequencies above this

frequency will be included in the signal.

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5 Tools

5.1 Fast Fourier Transform (FFT)

The oscilloscope software features the ability to transfer the waveform automatically to

the QuickFFT software in order to display the Fourier transform of the signal. The

original and transformed signals can be saved for later viewing or printed from within the

QuickFFT software. This feature requires that the QuickFFT software be installed and is

accessible by selecting Tools → QFFT from the menu.

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6 Hardware Configuration

6.1 DB-25 Connector

The DB-25 connector provides the following signals:

Pin Signal Input /

Output Description

1 ENCA1 I/O Encoder 1 (A) or Digital I/O Bit 8

2 ENCB1 I/O Encoder 1 (B) or Digital I/O Bit 9

3 ENCA3 I/O Encoder 3 (A) or Digital I/O Bit 12

4 ENCB3 I/O Encoder 3 (B) or Digital I/O Bit 13

5 5V

6 GND

7 ENCA2 I/O Encoder 2 (A) or Digital I/O Bit 10

8 ENCB2 I/O Encoder 2 (B) or Digital I/O Bit 11

9 ENCA4 I/O Encoder 4 (A) or Digital I/O Bit 14

10 ENCB4 I/O Encoder 4 (B) or Digital I/O Bit 15

12 SYNCOUT O Data Acquisition Synch Output

13 EXTTRG I External Trigger Input

18 IO7 I/O Digital I/O Bit 7

19 IO6 I/O Digital I/O Bit 6

20 IO5 I/O Digital I/O Bit 5

21 IO4 I/O Digital I/O Bit 4

22 IO3 I/O Digital I/O Bit 3

23 IO2 I/O Digital I/O Bit 2

24 IO1 I/O Digital I/O Bit 1

25 IO0 I/O Digital I/O Bit 0

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7 Troubleshooting

The USB-UT350 utilizes the full amount of current available as outlined in the USB 2.0

specification. The real world implementation of USB 2.0 varies between computers and

some will provide more current to the device than others. If you are having difficulties

maintaining a steady signal at high pulse voltages, make sure that there are no other

devices drawing current from the USB. If this does not resolve the issue it may be

necessary to connect the external power adapter to the USB-UT or to use the device with

a different computer.

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8 Specifications

Pulse Voltage -40V to 300V p-p in 256 steps

Pulse Width 50ns to 500ns in increments of 20ns

Damping 500Ω

Internal Trigger 1 Hz to 1,000 Hz in 1 Hz increments

Receiver Gain 0dB to 80dB in 0.1dB increments

Filter 0.6 MHz to 18 MHz fixed

Waveform Full rectification, +Half rectification, -Half rectification, or RF

Sampling Rate 50 MHz, 25 MHz, 12.5 MHz, 6.25MHz

Resolution 8 bits (0 to 255)

Waveform Length 2 to 8,190 samples, or 1 to 32000 with 32K memory option

Trigger Source Internal or Software

Transducer Range 1 to 10 MHz for square pulser

20 kHz to 10 MHz for tone burst pulser

USB Connection USB 2.0

Connectors 2 BNC Connectors: Pulse Out and Receive In

Post Trigger Delay 0 to 16,370 samples in 1 sample increments

Dimensions 4.2”x5.65”x1.55” (107mm x 144mm x 40mm)

Power Supply External power supply: +9V / 1000mA or power from the USB

connector.

Weight 1 lb

Add-on Options Up to 2 encoder counters

16-bit I/O

External trigger

Sync Out

Battery monitoring circuit

Tone burst pulser

350V pulse voltage

Hardware high pass filter

Multi-channel version up to 16 channels

Flaw Detector software

Thickness Gauge software

Windows software development kits for

LabVIEW, MS C/C++ or Visual Basic

US Ultratek USB-UT350M8 User manual

Brand: US Ultratek

Model: USB-UT350M8

Type: User manual

This manual is also suitable for

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