Unit UT568A User manual

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Acoustic Imager

UT568A Acoustic Imager User Manual
Warranty and Calibration
Within two years from the purchase date of this product, Uni-Trend will provide
free warranty service for the abnormal or fault caused by product quality
problems. This free warranty service does not apply to problems caused by
improper use and drop.
In case of product failure caused by improper use or accidental drop, Uni-Trend
promises to provide maintenance service at cost price.
The product has been calibrated before leaving the factory. However, in the
process of long-term use, it is recommended to send the product to the
manufacturer every 2 years for calibration, detection and maintenance.
Introduction
The acoustic imager supports ultrasonic frequency band. The product uses the
microphone array beamforming technology to acquire the distribution data of
sound sources, and collects videos and images in real time with the HD camera.
By fusing the distribution data of sound sources with videos and images, the
changing sound sources are dynamically shown on the display.
The acoustic imager can quickly detect possible pressurized gas leaks and
vacuum leaks on noisy industrial sites. When the product is used in power
system, it can rapidly identify potential partial discharge fault points.
The acoustic imager's housing is all aluminum alloys. So the product is rugged
and can be used in complex and changeable operating environments.
The product is easy to operate. Most test requirements can be satisfied only by
adjusting its frequency range and dynamic range. The product has image and
video modes for data recording. It can be inserted into a large-capacity TF card
to save and export the test results.
Safety Information
To prevent possible fire or personal injury:
zPlease read the safety information carefully before using the
product.
zUse the product only for the purpose specified.
zDo not disassemble the product without permission.
zPlease stop using the product if it is faulty or abnormally hot.
zPlease contact the manufacturer to maintain the product.
zDo not put the product near heat sources and flame or store it in
high temperature environments.
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zDo not charge the product at a high temperature (exceeds 45ȭ).
zPlease stop using the built-in lithium battery if it leaks.
zIf the leakage gets into eyes, rinse with water and seek medical
attention immediately.
zIf the leakage gets on the skin, rinse immediately with water.
Terminologies
USB Power Delivery (USB PD):
USB PD is a power transfer protocol based on USB3.1 that can transmit higher
power via USB interface.
Sound pressure level (SPL):
A physical quantity used to express the size of a sound wave. Its unit is decibels
(dB). Generally, it can be represented by dB SPL.
Audible frequency range:
The range (20Hz to 20kHz) that human ear can perceive sounds.
Ultrasound:
Ultrasound generally refers to the sound with a frequency higher than 20kHz
that cannot be perceived by human ears.
Acoustic image:
Acoustic image refers to the two-dimensional data table that represents the
intensity distribution of sound sources in the spatial plane after the signal
collected by the microphone array is calculated by the sound source location
algorithm.
Color palette:
Color palette is the color data used by the cloud image for color mapping.
Acoustic cloud image:
The SPL data of each resolution point on the acoustic image is mapped to a
certain color number on the color palette according to the conversion formula
to form a color image, which is then fused with the visible image to form an
image.
Test spectrum range:
After selecting a frequency range supported by the product, the product will only
measure and display the acoustic cloud images within the frequency range, and
the sound outside the range will not be displayed.
Frequency spike:
Spike in the spectrum graph that indicates a significant source of sound in this
specific frequency.
Dynamic range:
Dynamic range is the scale of the sound source intensity that can be displayed
on an acoustic image.
Field of view:
For a camera, field of view refers to the angle formed by two diagonal points
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and the camera in the rectangular picture that the camera can shoot.
For an acoustic image, field of view refers to the angle formed by the two
diagonal points and the center point of the microphone array in the imaging
rectangular picture.
Product and Accessories
Appearance Name Description
Acoustic imager The product
Hand strap A hand strap that makes the product
easy to hold
Shoulder strap A shoulder strap that makes the
product easy to hold
Charger A power adapter for charging the
product
Charging cable A cable for charging the product
Portable power
source
A backup power supply for the
product
Earphones Connect the product to monitor
ultrasound
Protective case A protective case for storing the
product and its accessories
Battery and Charging
Battery:
Built-in lithium battery with nominal capacity of [email protected]
To charge the product:
Charge the product via the USB Type-C interface (with the icon ).The
product supports USB PD fast charge protocol. It is recommended to use a
power adapter or mobile power supply that supports 12V to 20V output with a
minimum output power of at least 15W to charge the product.
Instructions for charging and battery life:
1) If the charging indicator is on after the charger is plugged in, it indicates that
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the product is being charged. If the indicator is off, the product is fully
charged. Turn off the product before charging it.
2) When the battery is fully charged, the product displays 4 bars of power,
which can be used for about 4 hours (3 bars: 2.5 to 3 hours; 2 bars: 1.5 to
2 hours; 1 bar: half an hour to an hour).
3) When the product prompts that the battery is too low, charge it in time.
To use the product safely:
Do not putthe product near heat sources and flame or use it in high
temperature environments.
Do not put or use the product in sunlight for a long time.
Do not disassemble the product without permission.
Do not charge the product at a high temperature (exceeds 45℃).
Please stop using the product if it is faulty or abnormal.
Please contact the manufacturer to maintain the product.
To extend the battery life:
Do not charge the product for more than 24 hours.
If the product is not used for a long time, please charge the battery regularly.
Store the battery at -20℃to 40℃.
Note: If the battery capacity is low, contact the manufacturer to replace it.
Do not disassemble the product.
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Features/Buttons
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Power button Function button
TF card
USB Type-C communication interface
USB Type-C fast charge interface
Earphone jack
Charging indicator

Read Data in TF Card
Cautions for using the TF card:
Do not insert or remove the TF card when recording videos.
When taking images and recording videos, insert and remove the TF card
after the data is saved successfully.
Do not insert or remove the TF card when browsing and annotating data in
the playback menu.
When reading TF card data on the PC, do not modify the names of files and
folders in the TF card; otherwise, the test data may not be correctly
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三脚架

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identified and displayed in the playback menu.
Tripod Fixation (
Tripod Fixation
Optional)
Installation and Adjustment of Hand Strap/Shoulder Strap
②
①
③
③
①
②
Threaded hole

Main Interface
Battery status
Frequency range of spectrum
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Video area Operating mode Date and time
Function menu
Slider for adjusting dynamic range
Color palette

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Function Menu
To view the function menu, tap a finger on the video area.
Tap anywhere on the display outside the menu or do not operate the
product for a long time to hide the menu.
In the function menu, from left to right:
Steady/transient mode Image/video mode Playback Acoustic testing
Image settings System settings
Partial discharge pattern

Color Palette and Dynamic Range Adjustment
To view the slider for adjusting the dynamic range, tap the color palette in
the main interface.
Tap anywhere on the display outside the slider to hide it.
The slider for adjusting the dynamic range can be used to adjust dynamic
range parameters quickly.
Frequency Range of Spectrum
Tap and hold the middle of the frequency selection box to move the entire
box.
Tap and hold one end of the selection box to adjust the upper limit or lower
limit of the test frequency respectively.
Transient and Steady Modes
Tap the Steady/Transient Mode menu to switch the product operating mode.
In the transient mode, the product can quickly respond to transient signals and
changes of sound sources. This mode is suitable for locating rapidly changing
sound sources, such as partial discharge sources.
In the steady mode, the product will slow down the response speed to signals,
and the cloud image display will be steadier. This mode is suitable for observing
steady signals, such as gas leakage sound sources.
Image Capturing and Video Recording
Tap the Image/Video Mode menu to switch between image capturing and video
recording.
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Image Video

The icon in the top right corner of the video area changes as the mode changes.
In the image mode, press the Function button on the right side of the product
to capture an image.
In the video mode, press the Function button to start recording. If the recording
duration exceeds 5 minutes or the Function button is pressed again, the
recording will be stopped and the video will be saved automatically.
When recording a video, the icon in the top right corner of the video area
displays the current recording duration.
Playback
Images and videos can be viewed in the playback interface.
1. Tap an image to expand it to full size or tap a videoto play it.
2. Tap Select to select videos or images for deletion.
3. Tap Select All to select all images and videos.
4. Tap in the upper right corner to delete selected images or videos.
5. Tap to view the information of the current storage space.
Image Playback
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Select
Select

Double tap on an image to enlarge it. The enlarged image can dragged with
fingers. Double tap the image again to restore it to original size.
To step through images/videos, tap or or slide the screen left/right.
Video Playback
Tap a video thumbnail to enlarge and play this video.
Tap to pause or start playing the video.
To step through images/videos, tap or or slide the screen left/right.
Drag the progress bar below the video to adjust the playback progress.
Image, Audio and Text Annotations
In the playback interface, tap a video or an image, six white flag icons will
appear at the bottom of the screen. Tap the icons to add annotations to videos
or images. There are three types of annotation: image, audio and text. A total
of 6 annotations can be added.
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An Image Annotation is an additional image attached to the file. Examples
include an image of a label or character. After the Image Annotation is selected,
press the Function button to capture an image, and then tap the icon in upper
right corner to save the annotation. Tap the right icon to delete the captured
image. Tap the bottom right corner to select the image resolution (1920*1080,
1280*720 or 640*480).
An Audio Annotation is an additional audio attached to the file. Examples
include a person's voice or any other voice on the scene. After the Audio
Annotation is selected, press the Function button to use the microphone to
record a single channel audio. To improve recording, the microphone array can
be placed close to the sound source or the person who is speaking. Press the
Function button again to stop recording. Tap the Save icon to save the audio.
A Text Annotation is an additional text attached to the file. Text annotations can
be added by using the keyboard or scanning the QR code. After the Text
Annotation is selected, tap the Keyboard icon, and then tap the input box to pop
up the keyboard. Use the keyboard to input texts, symbols, letters, etc. Tap the
Save icon to save the text annotation.
After the Text Annotation is selected, tap the QR code icon, and the product will
activate the camera and scan the QR code. After the QR code is identified, the
text information contained in it will be displayed. Tap the Save icon to save the
text annotation. Tap "Reidentify" to reidentify the QR code.
Acoustic Testing
Dynamic Range
Adjust the dynamic range by sliding the slider or tapping the color palette bar
to view the quick adjustment box.
Cursor and SPL
The cursor function can be enabled or disabled.
When the cursor and SPL functions are enabled, the cursor will be displayed in
the video area, and the cursor number is displayed below it. The acoustic image
energy at the point of the cursor is displayed below the upper right image/video
icon. If three cursors are set, the SPLs of the No.1, No.2, and No.3 cursors are
displayed from top to bottom. The number of cursors can be set in System
Settings->Tools->Number of Cursors. The maximum cursor number is 3.
Video Recording with Sound
When this function is enabled, the product can record videos with sound.
Ultrasonic Monitoring
The product can modulate the signal of ultrasonic frequency to the audible
frequency range, and can monitor the signal with earphones.
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Ultrasonic modulation is realized by superheterodyne, and the reference
frequency of modulation can be set. It is recommended to use the frequency
band of about 38.6kHz for modulation and monitoring.
Focusing
The focusing function is mainly used to eliminate interference noise, reflection
noise, multi-sound source interference, etc. When the test environment is noisy
and the cloud images are numerous, scattered and chaotic, the focusing
function can be enabled. The acoustic cloud images will be focused to a circle
to exclude other interference sources.
Double tap the circle in the middle of main interface to change the test range.
Double tap it again to restore the initial range.
Image Settings
Brightness: Adjust the backlight brightness. When the product is used
outdoors, it is recommended to increase the backlight brightness to have better
visual clarity. When used indoors, decrease the brightness to extend the battery
life.
Rainbow: Set the color palette to Rainbow.
Ironbow: Set the color palette to Ironbow.
Grayscale: Set the color palette to Grayscale.
System Settings
Languages
The optional languages are Chinese, English, Korean and French.
Time
The system time can be adjusted. After the change is made, tap "Confirm" to
save the updated time.
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Brightness
Rainbow
Ironbow
Grayscale

Low Power Consumption
The product can be set to low power consumption mode and enable the
automatic sleep function.
If no operation is performed within the specified period, the product
automatically enters the sleep mode. When the product is in the sleep mode,
the power indicator will flash. Press the Power button or the Function button to
quickly wake up the product and enter the test interface.
The auto power off function can be set only when the automatic sleep function
is enabled.
After the auto power off time is set, the product will shut down automatically if
it enters the sleep mode and does not wake up after the period of time.
Tools
When the log export function is enabled, the product operating logs will be
exported to the TF card. Operating logs are used by manufacturers to check
product status and are not required by users.
Number of cursors is used to adjust the number of dynamic cursors that can be
displayed. The maximum number is 3.
Sensitivity is used to set the minimum sensitivity of cloud image, which can limit
the cloud image energy to be higher than the sensitivity. With this function
enabled, the slider can set a sensitivity threshold.
About
The product model, serial number, software version and manufacturer can be
viewed.
Tap "Check for Updates" to install the new version of software. The product will
check external storage (TF card) for available software packages. Select the
software package to be installed to upgrade the software version.
Partial Discharge Pattern
Tap the Partial Discharge Pattern menu to enable and display the partial
discharge pattern. The AC frequency can be 50Hz or 60Hz. The partial
discharge pattern is shown in the following figure. By observing the
characteristics of the pattern, users can identify the discharge type.
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Tips on Operating Product
Sound Source Capturing
1) Observe whether there are prominent spectral signals or frequency spikes
in the spectrum graph. If there are, move the frequency selection box to
include the frequency range where the prominent spectral signals or
frequency spikes are located, and then see if a sound source appears in
the image.
2) Adjusting the dynamic range to a relatively large value can simultaneously
capture multiple sound sources with similar SPL in the image. When the
SPL of sound sources in the image is very different, relatively small dynamic
range may cause the large sound source to drown the small one.
Elimination of Reflection Interference
When users are not sure whether the sound source in the image is the actual
sound source or the reflected virtual image of the sound source, they can try to
capture it from different angles. If it can be captured from different angles, it is
generally the actual sound source. Because the reflected virtual image of the
sound source may have position offset or may even disappear at different
angles.
Elimination of Interference Noise
1) It is easily disturbed by ambient noise in low frequency band. According to
the actual situation of the sound source, it is recommended to use the
middle or high frequency band to locate the sound source.
2) Selecting a relatively narrow frequency band to locate the sound source
can eliminate the interference noise of other frequency bands.
Maintenance
1) Keep the acoustic sensor hole clean. When the acoustic sensor hole has
dust, please blow gently to clean, and do not use a wet cloth.
2) If the product is not used for a long time, put it in the protective case after
charging and store it in a dry environment at room temperature.
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Ultrasonic amplitude

3) Regular checking the battery power and charging the battery can effectively
extend the battery life.
Specifications
Microphone array Display screen
Microphone 128-channel MEMS
digital microphone Resolution 1024*600
Frequency band 2kHz-48kHz Size 7 inches
Field of view of acoustic
image 62° Touchscreen Capacitive
Frame rate of acoustic
image
˚25FPS Backlight brightness Adjustable
SPL range 30dB-120dB Battery and battery life
Camera
Battery capacity [email protected]
Field of view 62° Battery life About 4 hours
Focus Fixed lens 3.04mm Charging
USB Type-C
interface, USB PD
protocol
Pixels 8 million Power consumption
The maximum
power consumption
of the product is
about 29W
(charging power for
battery protection),
and the single-
charge battery
power is 16W
Data storage Operating environment and others
External storage 64G TF card Operating conditions
-10ćto +50ćˈ
10%-95% non-
condensing
Internal storage
About 8G memory, for
emergency storage
only
Storage temperature -20ćto 40ć
Storage formats .jpg (images) and .mp4
(videos)
Charging
temperature 10ćto 45ć
Communication interface Size and weight
USB interface USB 3.0 Type-C Product size 272mm x 174mm x
42mm
Earphone jack 3.5mm Product weight
About 1.7kg (hand
strap and shoulder
strap are not
included)
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Note: The battery life may be reduced when the product operates at a low temper
ature.
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