YUSHI YUT-2600 User manual

YUSHI INSTRUMENTS
YUT-2600
Digital Ultrasonic Flaw
Detector
Operating Manua l

YUSHI INSTRUMENTS
Preface
Product Introduction of YUT-2600 Digital Ultrasonic
Flaw Detector
Digital Ultrasonic Flaw Detector is developed by our company after scientific
researches and experiments. It is identified and approved by related authoritative
departments in China, such as electricity department, petrochemical department and
railway departments, as a new generation of defectometer. It works on the pulse
reflection fault locating principle. Its all testing functions are controlled by a micro
computer. The instrument may be powered by alternative and direct current. Small
size and light weight make it an ideal portable instrument. At present, it has been
widely applied to nondestructive testing in the fields such as electricity, oil industry,
petrochemical industry, machinery, aviation, metallurgy, boiler and pressure vessels,
steel structure and armament industry etc.
The invention of YUT-2600 is a milestone of our company, which reflects our
researching and developing capability has entered a new stage. Quality first,
credibility first, service first and innovation first are our principles since the
establishment of the company.
As a portable and small-sized testing instrument, the TFT monitor of YUT-2600
can show the testing results in most clear and pleasant way. Even in strong light, the
results can be read without the help of a light shield. The comfortable soft-touch
keyboard is sensitive to operations and it’s water-proof and oil-proof. All keys’
instructions are in Chinese. On the monitor, both English and Chinese are available.
The objectives of this instruction manual are to make users get used to the
functions, performances and operations of the instrument. In order to get a quick
access to the operations and functions of this instrument, and to work with it skillfully,
please read this manual very carefully.
The tasks of flaws testing are very varied. So are the principles and regulations to
follow. However, by using this instrument skillfully and flexibly, there will be little
difficulty in completing all kinds of flaw testing missions.

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Contents
CONTENTS ....................................................................................................................................................... I
CHAPTER 1 A BRIEF INTRODUCTION TO YUT-2600 ............................................................................1
1.1 NAMES OF THE MAJOR COMPONENTS OF THE INSTRUMENT.......................................................................1
1.2 KEYPAD......................................................................................................................................................1
1.3 DISPLAY SCREEN........................................................................................................................................2
1.4 BASIC OPERATION OF THE INSTRUMENT.....................................................................................................2
1.4.1 Power Supply..................................................................................................................................................2
1.4.2 Probe Connection............................................................................................................................................3
1.4.3 Switching On and Off the Instrument .............................................................................................................3
1.4.4 Restore the Initial Parameters of the Instrument .............................................................................................3
1.5 MAIN MENU AND FUNCTIONS ....................................................................................................................4
1.5.1 Main Menu......................................................................................................................................................4
1.5.2 Functional Keys ..............................................................................................................................................4
CHAPTER 2 FUNCTIONS, FEATURES, AND PARAMETERS OF THE INSTRUMENT.....................5
2.1 BASIC FUNCTIONS OF THE INSTRUMENT .....................................................................................................5
2.2 FEATURES OF THE INSTRUMENT..................................................................................................................5
2.3 SPECIFICATIONS .........................................................................................................................................6
CHAPTER 3 DETAILED OPERATION INSTRUCTIONS........................................................................7
3.1 BASIC MENU FUNCTIONS...........................................................................................................................7
3.1.1 Sound Path......................................................................................................................................................7
3.1.2 Sound Velocity................................................................................................................................................7
3.1.3 Displacement...................................................................................................................................................7
3.1.4 Gain.................................................................................................................................................................8
3.1.5 Compensation .................................................................................................................................................8
3.1.6 Scale................................................................................................................................................................8
3.1.7 Reject..............................................................................................................................................................9
3.1.8 Wave Height Readings....................................................................................................................................9
3.2 SETTING MENU ..........................................................................................................................................9
3.2.1 Waveform Filling ............................................................................................................................................9
3.2.2 Color Scheme..................................................................................................................................................9
3.2.3 Language.......................................................................................................................................................10
3.2.4 Lighting.........................................................................................................................................................10
3.2.5 Alarming .......................................................................................................................................................10
3.2.6 Automatic Wave Height ................................................................................................................................10
3.2.7 Date...............................................................................................................................................................10
3.2.8 Time..............................................................................................................................................................10
3.2.9 Parameter Resetting ......................................................................................................................................11
3.3 GATE MENU .............................................................................................................................................11
3.3.1 Gate a Menu...............................................................................................................................................11

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3.3.1.1 Starting of Gate a ....................................................................................................................................11
3.3.1.2 Width of Gate a .......................................................................................................................................12
3.3.1.3 Height of Gate a......................................................................................................................................12
3.3.1.4 Mode of Gate a........................................................................................................................................12
3.3.1.5 Display Choice........................................................................................................................................12
3.3.2 Gate B Menu..............................................................................................................................................13
3.3.2.1 Starting of Gate b ....................................................................................................................................13
3.3.2.2 Width of Gate b.......................................................................................................................................13
3.3.2.3 Height of Gate b......................................................................................................................................13
3.3.2.4 Mode of Gate b .......................................................................................................................................14
3.3.2.5 Measuring Point.........................................................................................................................................14
3.4 PROBE MENU ...........................................................................................................................................14
3.4.1 Dual Probes...................................................................................................................................................14
3.4.2 Probe Zero.....................................................................................................................................................15
3.4.3 Probe K Value ...............................................................................................................................................15
3.4.4 Front Distance...............................................................................................................................................15
3.4.5 Work Piece Thickness ...................................................................................................................................16
3.5 CURVE MENU............................................................................................................................................16
3.5.1 DAC echo......................................................................................................................................................16
3.5.2 Gate A start....................................................................................................................................................17
3.5.3 RL.................................................................................................................................................................17
3.5.4 SL...............................................................................................................................................................17
3.5.5 EL ..............................................................................................................................................................17
3.6 MEMORY MENU .......................................................................................................................................17
3.6.1 Memory Number........................................................................................................................................18
3.6.2 Call-out .........................................................................................................................................................18
3.6.3 Storage ..........................................................................................................................................................18
3.6.4 Deletion.........................................................................................................................................................18
3.6.5 Communication.............................................................................................................................................19
3.7 OPERATION OF OTHER SPECIAL FUNCTIONAL KEYS.................................................................................19
3.7.1 Automatic Gain .............................................................................................................................................19
3.7.2 Freezing ........................................................................................................................................................20
3.7.3Wave Peak Memory.......................................................................................................................................20
3.7.4 Full Screen ....................................................................................................................................................20
CHAPTER 4 APPLICATION OF TESTING...............................................................................................20
4.1 CALIBRATION METHOD AND STEPS OF THE INSTRUMENT.........................................................................20
4.2 ZERO CALIBRATION OF THE STRAIGHT BEAM PROBE...............................................................................21
4.2.1 Calibration Procedures..................................................................................................................................21
4.2.2 Operation Steps.............................................................................................................................................21
4.2.3 Measurement of the Sound Velocity of the Material .....................................................................................23
4.3 CALIBRATION OF THE ANGLE BEAM PROBE .............................................................................................23
4.3.1 Calibration Procedures..................................................................................................................................23
4.3.2 Operation Steps.............................................................................................................................................23
4.4 MAKING OF DAC CURVE .........................................................................................................................27

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CHAPTER 5 SKILLS OF USING THE INSTRUMENT............................................................................28
5.1 FLEXIBLE USAGE OF THE GATE ................................................................................................................28
5.2 MAKING THE BEST OF THE PROMPTING MESSAGES ON THE SCREEN DRUING THE OPERATION PROCESS.....28
5.3 SAVING AND CALLING THE INSTRUMENT STATUS AND THE DETECTION PARAMETERS................................28
5.4 USING BATTERIES TO REDUCE INTERFERENCE ..........................................................................................29
5.5 SWITCHING THE DISPLAY MODES..............................................................................................................29
5.6 PEAK VALUE MEMORY FUNCTION .............................................................................................................29
CHAPTER 6 APPLICATION AND PRACTICE OF FLAW DECTETION .............................................30
6.1APPLICATION ON STEEL PLATE FLAW DETECTION......................................................................................30
6.1.1 The adjustment of testing scope....................................................................................................................30
6.1.2 The adjustment of sensitivity ........................................................................................................................30
6.1.3 the identification of flaws..............................................................................................................................31
6.1.4 Flaw Evaluation ............................................................................................................................................31
6.1.5 Flaw Quantify ...............................................................................................................................................31
6.1.6 the identification of the defect location.........................................................................................................31
6.2 THE APPLICATION ON THE WELDING LINE FLAW DETECTION......................................................................32
6.2.1 Operating steps..............................................................................................................................................32
6.2.2 Measurement of the flaw length....................................................................................................................33
CHAPTER 7 MAINTENANCE AND REPAIRING....................................................................................33
7.1 OPERATORS’TRAINING..........................................................................................................................33
7.2 INSTRUMENT MAINTENANCE ....................................................................................................................34
7.3 ENVIRONMENT REQUIREMENTS................................................................................................................34
7.4 MAINTENANCE OF RECHARGEABLE BATTERY...........................................................................................34
7.5 BATTERIES REPLACEMENT........................................................................................................................35
7.6 REPAIRING................................................................................................................................................35
CHAPTER 8 COMMUNICATION BETWEEN THE INSTRUMENT AND THE COMPUTER.........36
8.1 THE COMMUNICATION BETWEEN YUT-2600AND THE COMPUTER AND THE USE OF DATA PROCESSING
SOFTWARE......................................................................................................................................................36
8.2 MAIN FUNCTIONS ....................................................................................................................................37
APPENDIX I FLAW DETECTION REPORTS..........................................................................................38
APPENDIX II TERMILONOGY..................................................................................................................39

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Chapter 1 A Brief Introduction to YUT-2600
1.1 Names of the Major Components of the Instrument
1.2 Keypad
The keypad plays a role of mediator in the dialogue between human and machine. The keypad is
printed in Chinese and the layout of the keypad is shown in Figure 1-2. All the control instructions given by
the user to the flaw detector are finished entirely by the keypad. With the process of the keypad operation,
the instrument is able to identify various meanings of each key according to different conditions and then to
carry out the instructions of the operator. The detailed usage of each key will be introduced respectively in
the following chapters.
1. TFT True Color Display
2. Touch Keypad
3. D Ring
4. Hand Strap
5. Rotatable Stand
6. Power Adapter Port
7. Communication Port
8. T/R Probe Cable Port
9. R Probe Cable Port
The names of the major components of the instrument
are shown in Figure 1-1.
Figure 1-1
Figure 1-2
8
9
7
6
5
4
3
2
1

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1.3 Display Screen
Press to power the instrument on (the probe is not connected), and the screen is shown as Figure
1-3.
1.4 Basic Operation of the Instrument
During the operation of the instrument, directly press the corresponding menu key, and the relevant
menu will be displayed on the screen. There are 6 main menus in YUT-2600; and each main menu consists
of several sub-menus, which can be switched through up and down keys among the operation pages. The
selected menu is highlighted; and its value can be adjusted through left and right keys.
1.4.1 Power Supply
Using AC Adapter
Alternating current can be used to power YUT-2600 through an AC adapter. Plug the power output
terminal of the AC adapter into the socket on the YUT-2600. Pay attention to alignment of the red spots
on the socket when connecting the charger and the main unit. Otherwise, the instrument doesn't work.
Using Batteries
A pack of exclusive rechargeable built-in batteries can be used in YUT-2600, as shown in Figure
1-4.
Figure 1-3
Figure 1-4

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1.4.2 Probe Connection
When you use YUT-2600, we recommend using our stock probe connecting cable with the appropriate
probes. Various types of our standard stock probes can be used directly.
The probe should be plugged into the socket upside the instrument. When it is the mode of single probe,
the probe cable should be connected to T/R socket; when it is the mode of dual probe (one for transmitting,
the other for receiving), you should plug the transmitting probe into the T/R socket and the receiving probe
into the R socket. If these factors are not paid attention to, unfavorable results might be loss or disordered
echo waveform.
1.4.3 Switching On and Off the Instrument
Press to directly start up YUT-2600 and activate the standby mode. After the detection and data
storage, press to shut down the instrument.
1.4.4 Restore the Initial Parameters of the Instrument
If the instrument crashes or some functions are in disorder or the parameters of the instrument need
resetting, press twice before press (up) key or (down) key to select the submenu
resetting parameters. Then press (left) key or (right) key to adjust the parameters. When the
screen displays resetting parameters confirmation, press Ok to restore the parameters.
Note: after the instrument is initialized, all the parameters are reset to the factory defaults.

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1.5 Main Menu and Functions
1.5.1 Main Menu
Main Menu
Submenu Functions
Basic
Gain, Compensation, Sound Velocity, Sound Path,
Displacement, Scale, Reject, Wave Height Readings
Basic Parameters
in Detection
Setting
Waveform Filling, Color Scheme, Language, Unit, Alarm,
Automatic Wave Height, Date, Time, Parameter Resetting,
Lighting
Basic Functions of
the Instrument
Gate
Gate A Start, Gate A Width, Gate A Height, Gate A Mode,
Display Mode, Gate B Start, Gate B Width, Gate B Height,
Gate B Mode, Measurement Point
Relevant Options
Setting Gate
Probe
Dual Probes, Probe Zero, Probe K Value, Front Edge
Length, Work Piece Thickness
Relevant Options
Setting Probe
Curve
DAC Echo, Gate A Start Position, RL, SL, EL
Setting of Making
DAC Curve
Storage
Memory Number, Call Out, Storage, Deletion,
Communication
Setting of Data
Storage
1.5.2 Functional Keys
Automatic gain
Increase or decrease the highest wave inside the gate to 80% of the screen
Freezing
Waveform freezing
Wave Peak Memory
Automatically store the highest wave
Full screen
Full screen display
On/off
Switch on and off
Menu control keys Up,
down, left, right, Ok
Up/down keys are used to switch among options, left/right keys are used
to adjust values.

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Chapter 2 Functions, features, and parameters of the instrument
2.1 Basic functions of the instrument
Wave peak memory: real time envelopes show the highest wave of the flaws and record the maximum
value of the flaws, it is helpful to position the flaws precisely and scan the work piece quickly. With the help
of envelope waveform, the quality of the flaws can be determined.
Automatic gain: automatically adjust the gain to the preset amplitude height
Alarming function: afferent echo/echo loss alarming
Real-time clock: automatically record and store the date and time of waveforms
Display freezing: catch waveforms and sound path data at any moment, and the gate can be moved
after freezing to measure the echo parameters
Flaw positioning: real-time display sound path S, horizontal X, depth Y, and wave height H
Digital Reject: 0-80%, increase by 1%, unaffecting the linearity and gain
Wave height reading: three display modes, namely relative wave height, dB difference relative to the
gate, and dB difference relative to DAC curve
Data communication: communicate with the computer through RS232 port to transmit waveforms
and data so as to manage the result of detection on the computer, and generate the flaw detection reports, as
well as print out reports
2 independent measurement gates, monitoring the echo amplitude and the sound path distance
When using transverse wave to detect flaws, the depths of the second and third waves are automatically
calculated according to the slab thickness.
Perfect DAC/AVG curve functions, the curves change along with the changes of the gain, sound path,
and displacement
2.2 Features of the instrument
The firm and durable YUT2600 are specially designed for the hostile site environment. The
pan-seal design which is particular in the nation enables it to defend against dampness, sandstorm, dust, or
pollution caused by all sorts of harsh environments from sea to desert.
Pan-seal design, including tool housing, battery case, fastening screws, and external interface
31 copper screw nuts are inlaid in the hard plastic casing
The innovative rotating positioning stand is convenient
The hand strap can be installed for both hands so that you can hold the machine with your left or
right hand

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The probe interface is optional for BNC or Lemo
The D-shaped ring on the instrument is convenient for you to install a cheststrap
The nice surface of the casing is antiskid with eroded textures
Innovative high power lithium batteries of notebook style
Full screen function, the echo display area can cover the entire screen, which provide you with the
sense of the maximum window
Solid waveform display, the visual contrast of waveforms is increased so the undetection is hard to
happen when fast scan is carried out
Bulk storage, up to 1000 data sets can be stored, including waveforms, curves, and parameters
(containing the traditional 1000 channels)
Echo-echo thickness measurement, zero calibration is avoided, and the net thickness of the base
material can be directly measured through the coating
Two operation interfaces are available, i.e., Chinese and English
Easy to use, the user can master the operation method very fast
2.3 Specifications
Working frequency: (0.5-15) MHz
Detection coverage: (0-177) inch
Sound Velocity of the Material: (0.039 to 0.394) inch/µs
Operation mode: pulse echo, dual crystal
Pulse displacement: (0-78.7) inch
Probe zero: (0-99.99) µs
Damp: 33/50/100/500Ω
Gain adjustment: (0-110)dB，0.1dB、1.0dB、2.0dB、6.0dB Full automatic adjustment of steps
Reject scope: 0-80% adjustable
Vertical linearity error: ≤3%
Horizontal linearity error: ≤0.3%
Resolution: ≥32dB (5P14)
Dynamic range: ≥30dB
Sensitivity allowance: ≥55dB （0.787’’ deep Φ2 Flat-bottom hole)
Data storage: 1000 data sets, including flaw detection status parameters, echoes, DAC curves
Average electric noise and level: ≤10%
Battery types: high power lithium battery
Power supply: 220VAC, 11VDC
Working hours of the batteries: 8 hours.
Casing: pan-seal design of IP67 standard, real waterproof, dampproof, and dustproof.
External dimension: 10.63’’X7.48’’X2.36’’
Weight: 1.4kg without batteries
Working temperature: 14℉to 122℉

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Chapter 3 Detailed Operation Instructions
3.1 Basic Menu Functions
Press to start the menu.
3.1.1 Sound Path
On the sound path submenu, you can make the adjustment of the display range, i.e., the frequency of the
echo displayed. The range is from 25 to 4500mm.
On the parameter menu, press (up) or (down) to select the sound path submenu, then press
(left decrease) or (right increase) to adjust the values.
On the sound path submenu, press OK to adjust the steps. The steps are 1, 10, 25, and 100.
3.1.2 Sound Velocity
On the sound path submenu, you can adjust the velocity of the ultrasonic wave transmitted in the
detected work piece. The range of adjustment is from 1000 to 9999m/s.
On the parameter menu, press (up) or (down) to select the sound path submenu, then press
(left decrease) or (right increase) to adjust the values.
On the sound velocity submenu, press Ok to adjust the steps. The steps are 1, 10, 100 and V-V.
When V-V is selected, you can switch between two preset velocities, namely 5920m/s or 3240m/s.
The Sound Velocities of Some General Materials
Materials
Transverse
Sound Velocity
Longitudinal
Sound Velocity
Materials
Transverse
Sound Velocity
Longitudinal
Sound Velocity
Copper
2260m/s
4700m/s
Organic Glass
1460m/s
2730m/s
Aluminum
3080m/s
6300m/s
Steel
3230m/s
5920m/s
Iron
3230m/s
5900m/s
Epoxy Resin
1100m/s
2500m/s
3.1.3 Displacement
The displacement submenu displays the starting point of the screen. When the value is adjusted, the

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waveform will move horizontally. The adjustment range is from 0 to 2000mm.
On the parameter menu, press (up) or (down) to select the displacement submenu, then
press (left decrease) or （right increase) to adjust the values.
On the displacement submenu, press OK to adjust the steps. The steps are 1, 10, 25, and 100.
3.1.4 Gain
The gain submenu enables you to adjust the sensitivity of the instrument. Its unit is dB. The higher is
the gain, the more sensitive the instrument is, and vise versa. The adjustment range is from 0 to 110dB.
On the parameter menu, press (up) or (down) to select the gain submenu, then press
(left decrease) or (right increase) to adjust the values.
On the gain submenu, press Ok to adjust the steps. The steps are 0.1, 1.0, 2.0 and 6.0.
3.1.5 Compensation
Owing to the different degrees of roughness of surface of the detected object and the test block
calibrating the instrument, in the practical detection, you need to increase (or decrease) the sensitivity of
instrument to reduce the influence caused by the surface of the detected object. The range of adjustment is
from -40 to +40 dB. The values used in the adjustment are related to the gain values.
On the parameter menu, press (up) or (down) to select the compensation submenu, then
press (left decrease) or (right increase) to adjust the values.
On the compensation submenu, press Ok to adjust the steps. The steps are 0.1, 1.0, 2.0 and 6.0.
3.1.6 Scale
This function enables you to adjust the display mode of the screen coordinate.
On the parameter menu, press to activate the function. Press (up) or (down) to
select the scale submenu, then press (left) or (right) to switch among various display modes.
S Sound Path: the actual distance of the sound wave from the surface of the work piece to the flaw.
X Horizontal Distance: the horizontal distance of the sound wave from the point of incidence to the
flaw.
Y Vertical Distance: the vertical distance of the sound wave from the surface of the work piece to the
flaw.

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3.1.7 Reject
After you adjust to a value, the echo below the value can be cleaned. For instance, you can remove the
structural noise of the detected work piece. The reject setting is shown by % on the screen, and the
adjustment range is 0-80%.
On the parameter menu, press to activate the function. Press (up) or (down) to
select the reject submenu, then press (left) or (right) to adjust the values.
You should handle this function with great caution, as it may happen that you suppress echoes from
flaws as well. In addition, some specifications expressly forbid using the reject function.
3.1.8 Wave Height Readings
Ha% The percentage of the waveform accounting for of the screen height in windows.
dBa The dB difference of the waveform relative gate can be shown in windows. When you use this
function, you should use Gate A to catch the echoes. Otherwise, it will result in error in reading.
SL In the windows, the dB difference of the quantitative line relative to DAC curve will be
shown. If there is no DAC curve, then it displays SL ----.
Hint: on the parameter menu, the 8 submenus are shown on two screens - the former five ones on
one screen, and the latter three ones on the other screen. You can switch among them by pressing .
3.2 Setting Menu
Press to select the setting menu.
3.2.1 Waveform Filling
This function enables you to adjust the waveform displaying mode.
Select the setting menu, press (up) or (down) to select the waveform filling submenu,
then press (left) or (right) to select off or on. Off refers to enveloping, and On refers to filling.
3.2.2 Color Scheme
You can use the function to adjust the colors on the screen.
Select the setting menu, then press (up) or (down) to select the color scheme submenu.

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Then press (left) or (right) to choose one of seven color schemes.
3.2.3 Language
You can use this function to choose a language.
Select the setting menu, the press (up) or (down) to select the language submenu. Then
press (left) or (right) to choose Chinese or English.
3.2.4Alarming
You can use this function to set whether there is an alarm.
On the setting menu, press to activate the function. Press (up) or (down) to select
the alarming submenu. Then press (left) or (right) to set the alarm. Off refers to turning off
the alarm, while On refers to turning on the alarm.
3.2.5Automatic Wave Height
You can use this function to set the percentage of the height of the automatic gain waveform on the
screen. The default status is 80%.
Select the setting menu, press (up) or (down) to select the automatic wave height
submenu. Then press (left) or (right) to adjust the values. The maximum value is 80%, while
the minimum is 20%.
3.2.6 Date
On the setting menu, press to activate this function. Press (up) or (down) to
select the date submenu. Then press (left) or (right) to set the date.
Press Ok to switch among year, month, and day.
3.2.7 Time
On the setting menu, press to activate this function. Press (up) or (down) to
select the time submenu. Then press (left) or (right) to set the time.
Press Ok to switch among hour, minute, and second.

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3.2.8 Parameter Resetting
Select the setting menu, press (up) or (down) to select the parameter resetting submenu.
Press (left) or (right) to choose whether to reset the parameters, and press to reset the
factory defaults. If you want to cancel the resetting, press any key.
In the setting menu, 10 submenus are displayed on two screens, the former five ones on one screen and
the latter five ones on the other. You can switch among them by pressing .
3.3 Gate Menu
The most outstanding feature of the digital flaw detector is the ability to display all the analogue values
of echoes on the screen by digital signals. When the instrument is required to compare and compute a signal
wave, "human" is needed to tell it which echo to trace. We appoint "gate" for locking the echo to be
measured. The instrument handles and computes the echo inside the gate as well as displays all the data of
the highest echo (including data of the sound path, the horizontal distance, the vertical distance, and the
height).
The instrument works in a dual-gate mode with Gate A and Gate B. The reading mode of the gate is
single gate one. The user can choose Gate A as the current gate. Next, we are going to introduce the
adjustment of the position, width, and height of the gate based on the current gate.
Press to activate the gate menu. Press it for odd times to select Gate A, even times to select Gate
B.
3.3.1 Gate A Menu
3.3.1.1 Starting of GateA
Press for odd times to select the Gate A menu, then press (up) or (down) to select
the starting of Gate A submenu. Then press (left) or (right) to adjust the values.
Note: the starting of Gate A is the forward position of Gate A. The adjustment range: 0-9998mm.
When you adjust the values, you can press Ok to adjust the steps which are divided into 1, 5, and 10.

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3.3.1.2 Width of Gate A
Select Gate A menu, press (up) or (down) to select the width of Gate A submenu, then
press (left) or (right) to adjust the values.
Note: the width of Gate A is the backward position of Gate A. Minimum adjustment range is 2mm, while
the maximum one is same as the sound path value. When you adjust the values, you can press Ok to adjust
the steps which are divided into 1, 5, and 10.
3.3.1.3 Height of Gate A
Select Gate A menu, press (up) or (down) to select the height of Gate A submenu, then
press (left) or (right) to adjust the values.
Note: the height of Gate Ais the response and measurement thresholds. You can adjust the value in the
2%-98% range of the vertical full-scale on the screen. When you adjust the values, you can press Ok to
adjust the steps which are divided into 0.5, 2.5, and 5.
3.3.1.4 Mode of Gate A
Select Gate A menu, press (up) or (down) to select the mode of Gate A submenu, then
press (left) or (right) to adjust the values.
Off Turning off the gate, ie, turning off the alarming and measurement functions.
Positive Afferent Echo Alarm. In the coverage of Gate A, if the echo exceeds the preset gate height,
and the alarm is "on", the alarm will sound.
Negative Echo Loss Alarm. In the coverage of Gate A, if the echo is lower than the preset gate
height, and the alarm is "on", the alarm will sound.
3.3.1.5 Display Choice
Select Gate A menu, press (up) or (down) to select the display choice submenu, then press
(left) or (right) to adjust the values.
Note: when the function is off, the screen is closed. The other data is shown at the top right corner of
the screen.

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Display
Meaning
Display
Meaning
Sa
The sound path value of the echo in Gate A
Ha
The height of the echo in Gate A
Sb
The sound path value of the echo in Gate B
Hb
The height of the echo in Gate B
ba
The path difference of the echoes in Gate A and B
Da
The vertical distance from the surface of the
work piece to the flaw echo in Gate A
Ra
The projection distance from the probe front edge
to the flaw echo in Gate A.
Db
The vertical distance from the surface of the
work piece to the flaw echo in Gate B
Rb
The projection distance from the probe front edge
to the flaw echo in Gate B
dBa
The dB difference from the echopeak in Gate A
to the gate level position
off
Close display
dBb
The dB difference from the echopeak in Gate B
to the gate level position
3.3.2 Gate B Menu
3.3.2.1 Starting of Gate B
Press for even times to select the Gate B menu, then press (up) or (down) to select
the starting of Gate B submenu. Then press (left) or (right) to adjust the values.
Note: the starting of Gate B is the forward position of Gate B. The adjustment range: 0-9998mm.
When you adjust the values, you can press Ok to adjust the steps which are divided into 1, 5, and 10.
3.3.2.2 Width of Gate B
Select Gate B menu, press (up) or (down) to select the width of Gate B submenu, then
press (left) or (right) to adjust the values.
Note: the width of Gate B is the backward position of Gate B. Minimum adjustment range is 2mm,
while the maximum one is same as the sound path value. When you adjust the values, you can press Ok to
adjust the steps which are divided into 1, 5, and 10.
3.3.2.3 Height of Gate B
Select Gate B menu, press (up) or (down) to select the height of Gate B submenu, then
press (left) or (right) to adjust the values.
Note: the height of Gate B is the response and measurement thresholds. You can adjust the value in the
2%-98% range of the vertical full-scale on the screen. When you adjust the values, you can press Ok to
adjust the steps which are divided into 0.5, 2.5, and 5.

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3.3.2.4 Mode of Gate B
Select Gate B menu, press (up) or (down) to select the mode of Gate B submenu, then
press (left) or (right) to adjust the values.
Off Turning off the gate, ie, turning off the alarming and measurement functions.
Positive Afferent Echo Alarm. In the coverage of Gate B, if the echo exceeds the preset gate height,
and the alarm is "on", the alarm will sound.
Negative Echo Loss Alarm. In the coverage of Gate B, if the echo is lower than the preset gate
height, and the alarm is "on", the alarm will sound.
3.3.2.5 Measuring Point
You can use this function to set the measuring point position of the gate.
Select the Gate B menu, press (up) or (down) to select the measuring point submenu.
Then press (left) or (right) to choose the values. The peak mode refers to the highest
information of the echo in the gate, and the front mode refers to the first information when the echo goes
through the gate.
Note: in the peak mode, the echo need not go through the gate; while in the front mode, the echo must
go through the gate.
3.4 Probe Menu
Press to select the probe menu.
3.4.1 Dual Probes
You can use this function to set the probe types.
Select the probe menu, press (up) or (down) to select the dual probes submenu. Then
press (left) or (right) to adjust the values.
Note: On refers to the dual probes mode; while Off refers to the single crystal probe mode.

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3.4.2 Probe Zero
There is a certain sound path distance between the probe chip and the coupling surface of the work
piece to be detected, thus there will be a sonic time delay. The delay effect can be compensated by setting
the probe zero submenu.
Select the probe menu, press (up) or (down) to select the probe zero submenu. Then press
(left) or (right) to adjust the values.
Note: the adjustment range is 0-99.99μs. In the adjustment, you can press Ok to adjust the steps, which
are divided into 0.025, 0.1, and 1.
3.4.3 Probe K Value
When the angle beam probe is used, the included angle value (β) between the sound beam in the work
piece of the incidence of the sound wave and the surface normal should be set as: K value - k=tgβ.
Select the probe menu, press (up) or (down) to select the probe K value submenu.
Then press (left) or (right) to select the probe K value and the probe angle. Press (up) or
(down) to select the value option, then press (left) or (right) to adjust the value.
Note: when you adjust the probe K value, press Ok to adjust the steps of the K value. When you adjust
the probe angle, press Ok, then you are able to adjust the steps of the probe angle head. The steps of the K
value are 0.01, 0.1, and 1. The adjustment range is 0-9.99. The steps of the angle are 0.1, 1, and 10. The
adjustment range is 0-89.9.
3.4.4 Front Distance
In the menu, you can set the front edge length value of the probe (referring the distance between the
front edge of the angle beam probe to the point of incidence of the probe).
Select the probe menu, press （up) or (down) to select the front distance submenu. Then
press (left) or (right) to adjust the values.
Note: the adjustment range: 0-999.9mm. When you adjust the values, you can press Ok to set the steps,
which are divided into 0.1, 0.5, and 1.