GAOTek Flaw Detector With High Precise (Free Store Data)

This Flaw Detector with High Precise (Free Store Data) is a high speed flaw detector which can be used as non-invasive measurement with an operating frequency range from 0.4 MHz to 15 MHz.

GT00XY00ZQ

Description

Overview

GAOTek Flaw Detector with High Precise (Free Store Data) is a high speed flaw detector which can be used as non-invasive measurement with an operating frequency range from 0.4 MHz to 15 MHz. This flaw detector is designed to locate, evaluate and diagnose various defects (crack, inclusion and pinhole etc.) without any destruction and can be used both in a lab and field. It provides the free storage with big memory of 500 A graph data. The instrument can be widely used in any fields that need defect inspection and quality controlling e.g. manufacturing industry, iron and steel metallurgical industry, metalworking, chemical industry, etc., also be broadly used in the active safety inspection and service-life evaluation in such fields as aerospace, railway transportation and boiler pressure vessels, etc. It complies with IP65 standards.

Key Features

  • Automated calibration of transducer Zero Offset and/or Velocity
  • Automated gain, Peak Hold and Peak Memory
  • Automated display precise flaw location(Depth d, level p, distance s, amplitude, sz dB
  • Automated switch three staff gauge ((Depth d, level  p, distance s)
  • 100 independence setup, any criterion can be input freely, we can work in the scene without test block
  • Big memory of 500 A graph.
  • Gate and DAC alarm, Acoustic-Optical alarm
  • USB port, communication with pc is easy
  • The embedded software can be online updated
  • Li battery, continue working time up to 12 hours
  • There are 14 standards of DAC
  • Display freeze
  • Automated echo degree
  • Angles and K-value
  • Lock and unlock function of system parameters
  • Electronic clock calendar
  • Two gates setting and alarm indication
  • High-speed capture and very low noise
  • DAC, AVG, TCG, B Scan. Solid metal housing (IP65)
  • Automated calculates the size of the flaw with wide bottom type in AVG function.
  • 6 dB DAC functions
  • Provides high contrast viewing of the waveform from bright, direct sunlight to complete darkness and easy to read from all angles
  • Powerful pc software and reports can be export to excel

Technical Specifications

Scanning Range 0 in to 196.85 in (0 mm to 5000 mm)
Noise Level < 8 %
Velocity Range 1000 m/s to 11000 m/s
Vertical Linearity error ≤ 3 %
Frequency Range 0.4 MHz to 15 MHz
Gain Adjustment 0 dB to 110 dB
Vertical Linear Error Vertical linear error is not more than 3 %
Horizontal Linear Error ≤ 0.1%
Sensitivity Leavings ≥62 dB
Dynamic Range ≥ 32 dB
Standby Time ≥ 10 hours of continuous work
Standard Communication Interface USB
Data Save 500-A Scan images
Measuring Unit Inch/mm
Battery Li battery 7.4V  4800 mAh
Power Adaptor Input 100 V to 240 V/50 Hz to 60 Hz

Output 9 V DC/1.5 A

Working Temperature -4 °F x 122 °F (-20 °C to 70 °C)
Working Humidity 20 % to 95 % RH
Port Type BNC
Overall Dimension 9.37 in x 6.10 in x 2.20 in (238 mm × 155 mm× 56 mm)
Weight 2.64 lbs (1.2kg)

Additional Information

Accessories:

Standard Accessories

  • GAOTek Flaw Detector with High Precise (Free Store Data)
  • Straight probe
  • Angle probe
  • 9V Power adapter
  • BNC cables
  • Crates
  • User manual

Optional Accessories

  • PC software
  • Coupling agent
  • Standard test block

Functional Keyboard:

Keys included in three groups: Function group, usual key group and special Function group; usual key group comprises 9 key: Up, down, Left, Right, Gain step, dB+, dB-, Range. They are used for usual operating; and special function group consists of 6 keys: Gate, Auto gain, Zoom, Argument Cut, peak memory, Full gate, Next page .Function group consists of 8 keys: on/off key, Setting, Probe, Auto Calibrate, DAC/AVG, Save and Freeze.

Operation Process:

Select setting——>select probe type——>auto calibrate probe and other settings——>make curve (DAC, AVG)——>save setting——>start flaw detecting

How to Use:

    1. Get ready the job
    2. Insert the probe plug into the probe socket of the host, rotate tightly the locking nut;
    3. press , turn on the instrument.
    4. It will carry out self test.
    5. In normal case, when you turn on the unit, it will automatically enter into the status that it is in during last turning off. The instrument parameters are consistent with last turning off, but the waveform during last turning off will not display.
    6. Check voltage of the battery; if the power monitor shows that the voltage is low, it will turn off automatically 1 min after alarming bell.
    7. According to your application, ten independence setups can be applied, any criterion can be input freely, and we can work in the scene without test block. Whether it needs to calibrate the instrument, if yes, ask a professional technician to calibrate it.
    8. Measure.
    9. Save the results, big memory of 300 A graph.
    10. Turn off the instrument.

Description of Screen Display

Three Display Modes of Screen

  1. A-scan at normal mode
  2. A-scan at Enlarged mode
    You can activate Enlarge mode by . The gain and selected dB step value will be always displayed on the screen. And at the same time, all other functions are locked.

Function Displaying Items

The 16 functional groups are displayed at lower part of the screen in three pages. The current functional group will be highlighted, and at the same time, the current function in the current functional group will also be highlighted. Under Enlarged mode, the display of functional groups disappears.

Description about Symbols Displayed on Screen

In the fig left, echo amplitude

H=84%, depth to the reflector=1.57 mm, surface distance=25.14 mm, echo times is 2, start of range=0.0 mm, end of range=40.0 mm

In the fig left, echo amplitude (pixels) H=148, Angular distance=27.68 mm.

Display of echo times

When the angle of probe is not zero and the measured echo is multi-echo, the echo times will be drew on the status column.

Description about other symbol

There some other symbols above functional menu, Freeze and Communication symbol is beside the battery status symbol.

symbol name Description
  *Freeze Freeze state.
  !Communication The instrument is communicating with PC.
  Angular distance Distance from the incidence point to the reflect point.
  Depth to reflector Depth from the incidence point to the reflect point.
 → Surface distance Surface distance from the incidence point to the reflect point.
  Echo amplitude The amplitude value of max echo within the gate.
   Edge sampling It shows that the instrument is in “Edge sampling”, mode, depth and angular distance is the measure value of the first echo which is above the gate and within the gate.
  Peak sampling It show that the instrument is in “Peak sampling”, mode, depth and angular distance is the measure value of the echo with the max amplitude within the gate.
 P Memory peaks Peaks memory function is enabled.
 T Making video Dynamic Record function is enabled.
 E Operation error Operation error last time.
 θ Radian revise Abscissa and measure result is revised according to radian.

Overview of All Functions

The functional groups include BASE, PROBE, SET, MEM, GATE, AUTO C, DAC1, DAC2, AVG1, AVG1, PULSE, GAIN, CFG1, and CFG2 they will be introduced in the following table.

No. group Functions Description
1 BASE RANGE, MTLVEL, D-DELAY , T-VALUE Basic adjustment items necessary for the display range
1 PROBE PROBE TYPE/ PROBE POS, ANGLE/K-VALUE , P-DELAY/

X-VALUE, X-COORD/ PART DIA

Probe adjustment items needed
1 SET SETTING NO.,SET COPY,SAVE/ SET MODIFY,DELETE/CLEAR ALL Relative items for independence setups
1 MEM DATA NO, RECALL, SAVE, DELETE Setting of data memory
1 GATE GATE LOGIC/ALARM, aSTART/bSTART, aWIDTH/bWIDTH, aTHRESH/bTHRESH Relative items for gate configuration
2 AUTO C CSBT, CABT, aSTART/aWIDTH, TYPE Automated calibration of transducer
2 DAC1 DAC/REVISE, RECORD/REVISE POS, aSTART/aWIDTH, SHOW

MARK/DAC MODE

Plotting DAC curve
2 DAC2 DAC-EL/ERS-REF, DAC-SL, DAC-RL, T-KORR/JDAC Setting relative with

DAC curve

2 AVG1 AVG MODE/CHOCK VEL,PROBE NAME,FREQUENCY/DIAMETER,REF

TYPE/REF SIZE

2 AVG2 A START/AVG CURVE,RECORD REF,TEST ATTN/CORRECT
3 Pulse ENERGY Pulse width
3 Gain REF GAIN,ADD REF,SCAN DB,AUTO GAIN Relative items Relative items for gain
3 CFG1 DETECT/ REJECT, GRID/BRIGHTNESS, UNIT / BUZZER,

DATE/TIME

3 CFG2 LANGUAGE, COLOR SET, ABOUT

Basic Operation Way

Firstly, you can select all usual functions by shortcut key. You can select a functional group by Right/Left key and Next page; select certain function by up / down key and Enter (press the rotary knob); at this time, you can modify parameters of this current menu by the rotary knob. And for some functional menus, they are shared by two functions, when you have selected such a function, by pressing Enter, it can be shifted to another function

Description of functions and operation way
Multipurpose Function Items

In some cases, a functional item has two functions.. The symbol “>” displayed behind the Function’s name means that it is a multipurpose function item.

Function I Function II Functional group to which belongs
GATE LOGIC ALARM GATE
aSTART bSTART GATE
aWIDTH bWIDTH GATE
aTHRESH bTHRESH GATE
ANGLE K-VALUE PROBE
X-VALUE X-COORD PROBE
PROBE POS PART DIA PROBE
RECORD REVISE POS DAC1
aSTART aWIDTH DAC1
SHOW MARK DAC MODE DAC1
DAC-RL ERS-REF DAC2
AVG MODE CHOCK VEL AVG1
FREQUENCY DIAMETER AVG1
REF TYPE REF SIZE AVG1
A START AVG Curve AVG2
CORRECT TEST ATTN AVG2
B-scan A-scan B/V
ABOUT COLOR SET CFG1
DATA NO (for Wave) DATA NO MEM
COORDINATE BRIGHTNESS CFG1
UNIT BUZZER CFG1
DATE TIME CFG1

Rough and Fine Adjustment of Functions

For some functions, rough and fine adjustments are available. By pressing down the corresponding Enter key, you can shift between these two adjusting modes. With a symbol “*” in front of the function item that means it is in fine adjustment mode.

The following are the functional items with optional rough and fine adjustment

Functions  Functional group     
RANGE BASE
MTLVEL BASE
D-DELAY BASE
T-VALUE BASE

Example of Function Operation:

Firstly Select the GATE group by the Right/Left key, and then select GATE LOGIC/ALARM functional menu by up / down key. This functional menu is multipurpose gate logic and alarm way, so user has to shift the two functions as he needs. if it displays ALARM way, the operation completes; if it displays GATE LOGIC, shift it to GATE LOGIC way by key Enter(Press the rotary knob) and now the operation of function selection is completed.

Adjustment of BASE Group

In the BASE functional group, users can adjust and set the functional items relative with the display range, including RANGE, MTLVEL, D-DELAY and T-VALUE.During the detection, the display range of screen is in great relation to the material of work piece and probe’s nature. The work piece material will influence the transmission velocity of ultrasonic wave.

Detection Range (RANGE)

It is to set the measuring range for screen display during detection
Range: 0 in to 236.22 in (0 mm to 5000 mm).If what selected currently is RANGE functional menu, then by pressing , it is allowed to shift between Rough and Fine adjustment.

Operation:

By <Page up> key, switch the function page.Select BASE functional group by <F1> key, and by “↑” or “↓” key, select the functional menu for RANGE, and then adjust parameters for RANGE by  “+” or “﹣”  key.Users can shift the Rough and Fine adjusting mode by key

Material velocity (MTLVEL)

Users are allowed to set the transmission velocity of ultrasonic wave in work piece.
Range: 1,000 m/s to 15000 m/s or 0.0394 in/µs ~ 0.3937 in/µs.If what selected currently is MTLVEL function menu, then by the key , it is allowed to shift between Rough and Fine adjustment.

Operation:

Select BASE functional group by < range > key, and by up/down key, select the functional menu for MTLVEL, and then adjust parameters for MTLVEL by the rotary knob.

Note: Users can shift the Rough and Fine adjusting mode by the <Enter> key.

Display starting point (D-DELAY)

It can set the pulse shift during detection, viz. D delay. By which, users are allowed to adjust the starting position for waveform, as well as adjusting the zero point of pulse, so as to make sure that it is at the surface or a starting face inside the workplace. If the pulse has to be started from the surface of workplace, D delay must be set to 0.

Range:  -20 µs ~ 3400 µs
Step:      0.1 µs

Operation:

Select BASE functional group by< range > key, and by up/down key, select the functional menu for D-DELAY, and then adjust parameters for D-DELAY by the rotary knob.
Users can shift the Rough and Fine adjusting mode by the <Enter> key.

Adjustment of PROBE Group

With this functional group, it is allowed to adjust and set the functional items in relation to ultrasonic sending and receiving, including PROBE TYPE/ PROBE POS, ANGLE/K-VALUE, P-DELAY/ X-VALUE, X-COORD/ PART DIA

PROBE TYPE/ PROBE POS

This menu is multipurpose for setting probe type and probe pos; by key , shift between probe type and probe pos.

PROBE TYPE:

Setting of ultrasonic probe: If the current probe is an echo probe, then set it to single (straight or angle); if it is a double-wafer probe, set it to DUAL, and if it is a through transmission probe, set it to THRU.

Select position of probe when we detect a pipe.

Options: Outside surface
Probe is placed on the outside surface of pipe, now, the corrected d value show the depth of the flaw from the outside surface of pipe, L value show the distance between flaw and probe front edge follow outside surface.
Inside surface:
Probe is placed on the inside surface of pipe, Now, the corrected d value show the depth of the flaw from the inside surface of pipe, L value show the distance between flaw and probe front edge follow inside surface.

Operation:

By <Page up> key switch the function page.
By <F2> key select PROBE functional group, and by “↑” or “↓” key, select the functional menu for PROBE POS, and then select probe posting by  “+” or “﹣”  key.

Probe Angle (ANGLE)/Probe K Value (K-VALUE)

This menu is multipurpose for setting probe angle and probe k value by key  , shift between ANGLE and K-VALUE.

ANGLE:
It is to adjust the angle of a probe.

Operation:

By <Page up> key switch the function page.
By <F2> key select PROBE functional group, and by “↑” or “↓” key, select the functional menu for ANGLE, and then adjust the probe angle by “+” or “﹣” key.

K-VALUE:

Operation:

By <Page up> key switch the function page.
By <F2> key select PROBE functional group, and by “↑” or “↓” key, select the functional menu for K-VALUE, and then adjust the probe k value by “+” or “﹣” key.

P-DELAY/ X-VALUE

This menu is multipurpose for setting p-delay and x-value by key , shift between P-DELAY and X-VALUE.

P-DELAY:

User can set the zero point of probe during detection, viz. P Delay. It is necessary to compensate the delay in probe resulted from acoustic beam in the pitch interval from energy exchanger to work piece by P Delay.

Range: 0µs to 99.99 µs
Step graduation:  0.01 µs

Operation:

By <Page up> key, switch the function page.
Select PROBE functional group By <F2> key, and by “↑” or “↓” key, select the functional menu for P-DELAY, and then adjust parameters for P-DELAY by  “+” or “﹣”  key.

X-VALUE:

It is to set the front edge of probe.

Range: 0 in to 0.39 in (0.00 mm to 50.0 mm)
Step:    0.039 in (0.01mm)

Operation:

By <Page up> key switch the function page.
By <F2> key, select PROBE functional group, and by “↑” or “↓” key, select the functional menu for X-VALUE, and then adjust the probe front edge by “+” or “﹣” key.

X-COORD/ PART DIA

This menu is multipurpose for setting X-COORD and PART DIA, by key    , shift between X-COORD and PART DIA.

X-COORD

Coordinate mode means the definition of the horizontal coordinate line, including “S-PATH” “P-VAL” and “DEPTH”, when the refraction angle is not zero, the function above is effective, when it is zero, and the coordinate is defined as S-PATH.

Options: S-PATH, P-VAL, DEPTH

Operation:

By <Page up> key switch the function page.
By <F2> key select PROBE functional group, and by “↑” or “↓” key, select the functional menu for X-COORD, and then adjust the coordinate mode by “+” or “﹣” key.

PART DIA:

When we detect a pipe, we must input the outside diameter of part and thickness exactly. Part diameter is the outside diameter of pipe.

Operation:

By <Page up> key switch the function page.
By <F2> key select PROBE functional group, and by “↑” or “↓” key, select the functional menu for PART DIA, and then adjust diameter value by  “+” or “﹣”  key.

Adjustment of MEM Group

This is for adjusting the memorizing modes, calling out, deleting and saving the configured data and detection parameters. It includes such functional menus as DATA NO, RECALL, SAVE and DELETE.

Function group MEM (DATA NO.)

It is for setting the MEM group No. after selecting the functional menu for Group No..

Operation:

By <Page up> key switch the function page.
By <F4> key select MEM functional group, and by “↑” or “↓” key, select the functional menu for DATA NO, and then set group no. by  “+” or “﹣”  key.

Recalling a stored data set (RECALL)

It is to recall data under Waveform Save mode, and call out the data corresponding to current group when the recalling succeeds, the current waveform and detection parameters will be substituted by the saved waveform and detection parameters, and the waveform is frozen.

Operation procedure:

By <Page up> key switch the function page.
By <F4> key select MEM functional group, and by “↑” or “↓” key, select the functional menu for

Storing a data set (SAVE)

This functional menu is for saving data. It is to save the current waveform data into the current group no. depending on the displayed save mode. Operation:

By <Page up> key switch the function page.
By <F4> key select MEM functional group, and by “↑” or “↓” key, select the functional menu for SAVE, and then carry out saving by“+” or “﹣” key.

  1. Before saving data, do make sure that there is no data in the data group corresponding to current group no, otherwise it will not work
  2. Set the current saving mode correctly
  3. If you need to upload the DAC curve to PC, please adjust the settings and DAC parameters firstly, and then save the data
  4. If the current group has already got waveform data, the saving action is invalid and it will prompt with buzz.

Deleting a data set (DELETE) /CLEAR ALL

It is to delete data. This is to delete the data corresponding to current group no, when the deletion succeeds, “*” before this group no. disappears.

Operation:

By <Next Page > key switch the function page.
By F4 key select MEM functional group, and by Up/Down key, select the functional menu for DELETE.

If current group no. has no data in it, by the rotary knob, this functional menu will always display OFF; if there is data existing in the group, by  “+” or  “﹣” key, it will show “Yes/No”, and now press the <Enter> key, the data will be delete, and press any other key to cancel delete.

CLEAR ALL:

By <Next Page > key switch the function page.
By F4 select MEM functional group, and by Up/Down key, select the functional menu for DELETE.
By “+” or “﹣” key, the menu will show “Yes/No”, if you press the <Enter> key then you will delete all data. And by pressing any other key, you will cancel the clear.

It is used for adjustment of gate settings, including Gate logic, Gate alarm, Gate start, Gate width and Gate height.

Functions of gate during detection:

To monitor whether the job has flaws in the set logic and range, if yes, it will alarm.
It is equipped with double-gate function: Gate A and Gate B, normally Gate A is used alone for detecting the work piece flaw, and the double-gate is usually used in the measuring and calibration of multi-echo.

GATE LOGIC/ ALARM

This menu is multipurpose for gate logic and gate alarm. Users can shift the functions for GATE LOGIC and ALARM by Enter key .

GATE LOGIC:

Gate logic has four options: NONE, POS, NEG, and MUL.
POS:       when the echo amplitude is higher than the preset threshold of the gate, it will alarm
NEG:    when the echo amplitude is lower than the preset threshold of the gate, it will alarm
MUL:    state of double gates

Operation:

By <Page up> key switch the function page.
By <F5> key select GATE functional group, and by “↑” or “↓” key, select the functional menu for GATE LOGIC, and then adjust the gate logic by  “+” or  “﹣” key.

Starting point of the gates (aSTART/bSTART)

This functional menu is multipurpose for Start of Gate A and Gate B. Users can shift the functions for aSTART and bSTART by the <Enter > key.

aSTART:

Operation procedure:

By the <Gate> key select GATE functional group, and by Up/Down key, select the functional menu for aSTART, and then adjust the aSTART by the rotary knob.

bSTART:

Operation procedure:

By the <Gate> key select GATE functional group, and by Up/Down key, select the functional menu for bSTART, and then adjust the bSTART by the rotary knob.

Response and measurement threshold (a THRESH/thresh)

This functional menu is multipurpose for Threshold of Gate A and Gate B, when this menu is selected, by  you can shift the two functions.

ATHRESH:

It is to set the threshold of Gate A. The parameter is expressed in percentage, i.e. the percentage in relative to the full amplitude.Parameter range: 2 % to 90 %

Operation procedure:

By <Page up> key switch the function page.
By <F5> key select GATE functional group, and by “↑” or “↓” key, select the functional menu for a THRESH, and then adjust the threshold of Gate A by “+” or “﹣” key.

BTHRESH:

It is to set the threshold of Gate B. The parameter is expressed in percentage, i.e. the percentage in relative to the full amplitude.Parameter range: 2 % to 90 %

Operation procedure:

By <Page up> key switch the function page.
By <F5> key you select GATE functional group, and by “↑” or “↓” key, you select the functional menu for b THRESH, and then adjust the threshold of Gate B by “+” or “﹣” key.

Auto C (Automated calibration of transducer)

Calibration of straight probe (CSBT)

For the convenience of user’s calibration of probe zero point and sound speed of material, the function of calibration is built in the gauge. Furthermore, users can also do the calibration of probe.

Calibration of angle probe (CABT)

For the convenience of user’s calibration of probe angle, front edge, zero point and sound speed of material, the function of calibration is built in the gauge. Furthermore, users can also do the calibration of probe as per below image. Angle probe can be calibrated with the following method, before calibration.

  1. IIW TYPE2 : For example of the standard angle probe which is frequency 4 MHz, wafer 0.31 in x 0.36 in (8 mm × 9 mm) , single and angle 60 °. We can use IIW TYPE2 block to calibrate angle probe. The unit will auto adjust range and gates for you.
  2. Select CABT in group Auto C (Automated calibration of transducer) by the < Auto Calibrate> key, by the <Enter > key, you can see 50/100 echo, then put your probe. Try to find the highest echo of 100, then press the <Enter > key twice, the zero point and sound speed of material has been calibrated. Then press the <Enter > key, you will see x (front edge)=XXX.XX in (mm), please read it and input it.
  3. By the <Enter > key you can see ANG echo, Then put your probe, Try to find the highest echo of the hole (φ 50), then press , you will see ANG=XXX.X.

Adjustment of DAC1 Group

The DAC1 group is for setting the parameters necessary for plotting a DAC curve. It includes DAC/REVISE, RECORD/REVISE POS, aSTART /aWIDTH, SHOW MARK, DAC MODE.

DAC display control (DAC)/ TCG display control (TCG)

This menu is multipurpose for DAC display control and TCG display control. Users can shift the functions for DAC and TCG display control (TCG) by the <Enter > key.

DAC:

It is to turn on/off the DAC display. It will be ineffective when B-scan is on.
Options: ON, OFF Operation:
By the <DAC/AVG> key select DAC1 functional group, select the functional menu for DAC, and then adjust the DAC by the rotary knob.

DAC Plotting Point (RECORD)/DAC Revise Position (REVISE POS)

This menu is multipurpose for DAC plotting point and DAC revise position. DAC plot is used for recording the echo information necessary for making DAC curve, and DAC revise position is used for positioning the plotting point who needs revising.

RECORD:

Range: 1~30

Operation:

  1. By the <DAC/AVG> key select DAC1 functional group, and by Up/Down key, select the functional menu for RECORD.
  2. Before each plotting, move gate A to the needed reference echo, and make sure that the reference echo is located within the gate, then add or delete a plotting point by the rotary knob.
  3. Users can shift the functions for RECORD and REVISE POS by the <Enter> key. REVISE POS:Parameter range: 1~30, not more than DAC plotting point value.

Operation:

By the <DAC/AVG> key select DAC1 functional group, and by Up/Down key, select the functional menu for REVISE POS. and then position the revision point by the rotary knob.

Users can shift the functions for RECORD and REVISE POS by the<Enter> key

Starting of the A gate (a START)/ DAC Revise (REVISE)

This menu is multipurpose for Start of Gate A and DAC Revise, the reason for setting Gate A here again is to make it easy for DAC recording under manual mode; by the <Enter> key.

aSTART:

When the DAC is open, by the <Gate> key, select the functional menu for the aSTART in DAC1 group, and then adjust aSTART by the rotary knob.

REVISE:

Re-plot the revision above points, if the curve is not well drawn due to some plotting point with big plotting error, users can select the corresponding plotting point and adjust the gate to corresponding position; re-plot that point by the function of re-plotting.

Option: ON, OFF

Operation:

By the <DAC/AVG> key select DAC1 functional group, and by Up/Down key, select the functional menu for REVISE, and then revise plotting by the rotary knob.

Show Marks/DAC curve mode

This menu is multipurpose for show marks and DAC curve mode. By the <Enter> key, shift the two functions.

Show Marks

We can show DAC marks as X symbol through the function. When one of marks is being revised, it will be show as small pane.
Option: ON, OFF Operation: By the <DAC/AVG> key, select the functional menu for Show Marks, and then On/off it by the rotary knob.

Curve mode

The connection mode between DAC marks.
Option: beelin, curve

Operation:

By the <DAC/AVG> key, select the functional menu for DAC curve mode, and then select the mode by the rotary knob.

Adjustment of DAC2 Group

DAC Group is used for adjusting the relative parameters necessary for plotting a DAC curve. It includes DAC-EL/ERS-REF, DAC-SL, and DAC-RL, CORRECT.

In order to meet the standard for plotting DAC curve in different industries, the instrument is equipped with three DAC curves with adjustable offsets, which are DAC-EL (evaluating line), DAC-SL (quantifying line), and DAC-RL   (reject-judging line). In addition, in order that DAC curve can be adaptive to different ambient conditions, Gain Compensation function is provided. The three offset curve are all generated from generatrix, and the generatrix is drawn according to the plotting points and the ultrasonic attenuation. According to their different functions, they appear separately as DAC-RL, DAC-SL and DAC-EL on the screen from top to bottom. CORRECT works for compensating the difference between the surfaces of test block and detected object which will influence the ultrasonic transmission between them. When the CORRECT gets increased, the three DAC offset curve will get lower correspondingly, and contrarily they will get higher.

DAC evaluating line (DAC-RL)/ DAC-REF

This menu is multipurpose for DAC-RL and DAC-REF; by ,  shift the two functions.It is to set the offset of DAC reject-judging line.

Parameter range: -50 dB~50 dB

Operation procedure:

By <Page up> key switch the function page.
By <F3> key select DAC2 functional group, and by “↑” or “↓” key, select the functional menu for DAC-EL, and then set the offset of DAC evaluating line by“←” or “→” key.
By key   , shift between DAC-EL and DAC-REF

DAC-REF:

DAC-REF means the curve which flaw echo confirm to as standard, “generatrix” or “quantify” is often used, in which generatrix means the primary plotting curve of DAC, another available three standards are all DAC offset. The standard above works only when the DAC is well completed.  Options: GL, RL, SL, EL .

Operation procedure:

  1. By <Page up> key switch the function page.
  2. By <F2> key select DAC2 functional group, and by “↑” or “↓” key, select the functional menu for DAC-REF, and then select the reference curve by “←” or “→” key..
  3. By pressing key , shift between DAC-EL and DAC-REF.

DAC quantifying line (DAC-SL).It is to set the offset of DAC quantifying line.
Parameter range:  -50 dB~50 dB.

Operation procedure:

By the <DAC/AVG> key select DAC1 functional group, and by Right key, select DAC2 functional group, select the functional menu for DAC-SL and then set DAC quantifying line by the rotary knob.

DAC evaluating line (DAC-EL)

It is to set the offset of DAC evaluating line.
Range:  -50 dB~50 dB

Operation procedure:
By <Page up> key switch the function page.
By <F3> key select DAC2 functional group, and by “↑” or “↓” key, select the functional menu for DAC-EL, and then set the offset of DAC evaluating line by“←” or “→” key.
By key   , shift between DAC-EL and DAC-REF

DAC-REF:

DAC-REF means the curve which flaw echo confirm to as standard, “generatrix” or “quantify” is often used, in which generatrix means the primary plotting curve of DAC, another available three standards are all DAC offset. The standard above works only when the DAC is well completed.  Options: GL, RL, SL, EL

Operation procedure:

  1. By <Page up> key switch the function page.
  2. By <F2> key select DAC2 functional group, and by “↑” or “↓” key, select the functional menu for DAC-REF, and then select the reference curve by “←” or “→” key..
  3. By pressing key , shift between DAC-EL and DAC-REF.

DAC quantifying line (DAC-SL)

It is to set the offset of DAC quantifying line.
Parameter range:  -50 dB~50 dB

Operation procedure:

By the <DAC/AVG> key select DAC1 functional group, and by Right key, select DAC2 functional group, select the functional menu for DAC-SL and then set DAC quantifying line by the rotary knob.

DAC evaluating line (DAC-EL)

It is to set the offset of DAC evaluating line.Range:  -50 dB~50 dB

Operation procedure:

By the <DAC/AVG> key select DAC1 functional group, and by Right key, select DAC2 functional group, select the functional menu for DAC-EL and then set the offset of DAC reject-judging line by the rotary knob.

DAC test standards (STANDARD)

There are 14 standards. “Custom ,GB/T 11345-89 A ,GB/T 11345-89B,GB/T 11345-89C, JB/T 4730-2005, JG/T 3034.1/2,  SY/T 4109-2005, GB/T 3559-94,ASME-3,  DL-T 820-2002 A,DL-T 820-2002 B,DL-T 820-2002 C,TB 10212-98D(butt welds) , TB 10212-98J(fillet welds)”. User can set Custom freely, and other standard is fixed. On the option, user presses enter key (press the rotary knob) can enter standards set menu, in the menu, we can adjust thickness of work piece and test block.

Operation procedure:

By the <DAC/AVG> key select DAC1 functional group, and by Right key, select DAC2 functional group. Select the functional menu for STANDARD and then set the DAC standards by the rotary knob.

Adjustment of AVG1 Group

AVG1 Group is used for adjusting the relative parameters necessary for an AVG curve. It includes AVG MODE/CHOCK VEL, PROBE NAME, FREQUENCY/DIAMETER, and REF TYPE/REF SIZE

AVG MODE/CHOCK VEL

This menu is multipurpose for AVG MODE and CHOCK VEL; by the <Enter> key, shift the two functions.

AVG MODE:

It is to turn on/off the AVG display. It will be ineffective when B-scan is on.
Options: ON, OFF Operation:
By the <DAC/AVG> key select AVG1 functional group, select the functional menu for AVG MODE and then set ON/OFF for AVG Curve by the rotary knob.

Note:  AVG Display ON/OFF will work when it has 1 record points.

CHOCK VEL:

Users are allowed to set the transmission velocity of ultrasonic wave in chock according to the sign on the probe.
Range:250 m/s ~16000 m/s or 0.0098 in/µs ~ 0.6299 in/µs

Operation:

By the <DAC/AVG> key select AVG1 functional group, select the functional menu for CHOCK VEL and then set the transmission velocity of ultrasonic wave in chock by the rotary knob.

Probe name

Users are allowed to input the name of the probe; the maxim character number is eight.
Option: ASCII character

Operation:

  1. By the <DAC/AVG> key select AVG1 functional group, select the functional menu for Probe name and then set the probe name for AVG Curve by the rotary knob and Enter key.
  2. By the <Enter> key, move cursor and by the rotary knob to select character.

FREQUENCY/DIAMETER
This menu is multipurpose for FREQUENCY and DIAMETER; by the <Enter> key, shift the two functions.

FREQUENCY:
Probe frequency can be input.
Range:0.5 MHz ~10 MHz

Operation:

By the <DAC/AVG> key select AVG1 functional group; select the functional menu for FREQUENCY and then set Probe frequency by the rotary knob.

DIAMETER

The diameter of probe can be input according to sign.
Range:0.11 in ~1.37 in (3.00 mm~35.00 mm)

Operation:

By the <DAC/AVG> key select AVG1 functional group, select the functional menu for DIAMETER and then set Probe diameter by the rotary knob.

 REF TYPE/REF SIZE

This menu is multipurpose for REF TYPE/REF SIZE; by the <Enter> key, shift the two functions.

REF TYPE:
We must select reflector style on the standard block. There are three reference types.

Option:

Flat bottom hole (FBH): It is a columnar hole in the bottom and its diameter is equal to the size of the reference flaw.
Short horizontal hole (SDH): It is a columnar hole in the side face and its diameter is equal to the size of the reference flaw.
Wide bottom (BW): The reflector is equal to infinite flat bottom approximately.

Operation:

By the <DAC/AVG> key select AVG1 functional group, select the functional menu for REF TYPE and then set reference type by the rotary knob.
REF SIZE: The size of reflector in standard block.
Range:0.01 in ~ 0.39 in (0.50 mm~10.00 mm)
Operation: By the <DAC/AVG> key select AVG1 functional group, select the functional menu for REF SIZE and then set reference size by the rotary knob.

Adjustment of AVG2 Group

The AVG2 group is for plotting AVG curve and setting the parameters necessary for plotting AVG curve. It includes Astart/AVG CURVE、RECORD REF、CORRECT/TEST ATTN.

Start of Gate A / AVG Curve

This menu is multipurpose for Start of Gate A/AVG Curve; by the <Enter> key, shift the two functions.

Start of Gate A/AVG Curve:

AVG Curve is made according to standard reflector, but when the size of standard reflector cannot meet your work, you can adjust its value.
Range:0.01 in ~0.78 in (0.30 mm~20.00 mm)

Operation:

By the <DAC/AVG> key select AVG1 functional group, and by Right key, select AVG2 functional group, select the functional menu for AVG Curve and then set value by the rotary knob.

 RECORD REF

The function is used for plotting AVG curve.
Option:0(no record) 1(recorded)
Operation:

To make sure that the system is in single gate mode.

  1. By the <DAC/AVG> key select AVG1 functional group, and by Right key, select AVG2 functional group, select the functional menu for RECORD REF.
  2. Move gate A to echo we need by left or right key. Adjust gain to make echo amplitude equal to 80 % of screen. Record the reference value by the rotary knob+. We can revise the value by deleting it (the rotary knob-) and recording it again.

CORRECT/TEST ATTN

This menu is multipurpose for CORRECT/TEST ATTN; by the <Enter> key, shift the two functions.

CORRECT:
The function is used for correcting coupling error between work piece and probe.
Range:-30 dB~30 dB

Operation:

By the <DAC/AVG> key select AVG1 functional group, and by Right key, select AVG2 functional group, select the functional menu for CORRECT and then set correct value by the rotary knob.

TEST ATTN

The function is used for correcting ultrasonic attenuation error in work piece.

Range:0.0 dB~100.0 dB

Operation:

By the <DAC/AVG> key select AVG1 functional group, and by Right key, select AVG2 functional group, select the functional menu for TEST ATTN and then set TEST ATTN value by the rotary knob.

Adjustment of Pulse Group
ENERGY:

To set the energy of pulse
Options: 1~5 (from low to high: 150 v 250 v 300 v 400 v 480 v)

Operation:

By <Next Page > key switch the function page.
By Left/Right key select P/R functional group, and by Up/Down key, select the functional menu for ENERGY, and then set the pulse energy by the rotary knob.

 Pulse Width

The function is used for plotting AVG curve. Option:30 ns ~300 ns
Operation:

  1. By <Next Page > key switch the function page.
  2. By Left/Right key select P/R functional group, and by Up/Down key, select the functional menu for Pulse Width, and then set pulse width by the rotary knob.

Adjustment of GAIN Group

The Angle Probe group is used for adjusting and setting the parameters for system gain. It includes REF GAIN, ADD REF, SCAN DB, and AUTO GAIN.

Compensate gain (REF GAIN)

We can set the reference for system gain. It is very useful. When we open the REF GAIN, the gain show as: XX+0.0dB,the first number is reference of gain, the second number is scan gain.
Handlers can set reference before detecting, add or decrease according to the practice in the scene.
Options: ON, OFF Operation:

  1. By <Next Page > key switch the function page.
  2. By Left/Right key select GAIN functional group, and by Up/Down key, select the functional menu for REF GAIN, and then set ON/OFF for REF GAIN by the rotary knob.

When we close the REF GAIN, only the reference value can be held.

 Add reference (ADD REF)

We can add scan gain to reference gain.
Options: ON, OFF Operation:

  1. By <Next Page > key switch the function page.
  2. By Left/Right key select GAIN functional group, and by Up/Down key, select the functional menu for ADD REF, and then set ON/OFF for ADD REF by the rotary knob.

Scan gain value (SCAN DB)/ Auto set gain (AUTO GAIN)

SCAN DB: We can switch scan gain value between Setting value and 0dB.
Options: ON, OFF Operation:

  1. By <Next Page > key switch the function page.
  2. By Left/Right key select GAIN functional group, and by Up/Down key, select the functional menu for ADD REF, and then set ON/OFF for ADD REF by the rotary knob.

AUTO GAIN:

We can use the function to adjust the gain automatically to make amplitude of the largest echo in gate equal X % of the screen
Options: 10 % ~ 100 %
Operation:
By <Next Page > key switch the function page.
By Left/Right key select GAIN functional group, and by Up/Down key, select the functional menu for AUTO GAIN, and then set X % by the rotary knob.

Gain correction (T-KORR)
T-KORR: Set the CORRECT GAIN.  Parameter range: 0 dB~60 dB
Step: 0.1dB Operation:
By Left/Right key select GAIN functional group, and by Up/Down key, select the functional menu for
T-KORR, and then set correct gain by the rotary knob.

Adjustment of CFG1 Group
Settings of DETECT/ REJECT, GRID/BRIGHTNESS, BUZZER / UNIT, DATE/TIME are completed in this group.

Measuring way (DETECT)/Reject (REJECT)
This functional menu is multipurpose for Measuring way and Reject (REJECT).

DETECT:
To select measuring way
Option: PEAK, FLANK Operation:
By the <System Config> key select CFG1 functional group, select the functional menu for DETECT and then select measuring way by the rotary knob.Users can shift the functions for DETECT and REJECT by Enter key.

REJECT:

This menu is used to reject the echo’s display amplitude, for example, to remove the structural noise in the job. It is to reject the display of echo whose amplitude is lower than the setting value by setting a percentage (i.e. percentage at full amplitude).The suppressing percentage (i.e. percentage at full amplitude) indicates the min. echo height to be displayed. Any echo amplitude lower than this height will be neglected and recorded as zero amplitude.

Parameter range: 0 % ~ 80 %
Step graduation:      1 %

Operation procedure:

By the <System Config> key select CFG1 functional group, select the functional menu for REJECT and then adjust suppression percentage by the rotary knob.

Calibrating the Instrument and Measuring

Before working, it is necessary to calibrate the sound speed, pitch interval and probe delay for the instrument, so as to be adaptive to the detection condition. Where, the reason for calibrating sound speed and probe delay is that the calculation of parameters displayed in the status line is relative with sound speed and probe delay, therefore you must calibrate before detection; while the purpose for calibrating pitch interval is to make it display waveform in proper range of pitch interval on the screen, so as to judge and evaluate the defects better. In order to operate the instrument safely and correctly, the instrument can be calibrated by a professional technician from field of ultrasonic detection.

Matters need attention before measuring:

The calibration including sound speed and P delay shall be completed, and the measuring way can be selected as front-edge and peak way. The wave amplitude measured is the max. Echo amplitude within the gate. With front-edge measuring way, the pitch interval measured is the pitch interval at front edge of echo within gate (up line of echo waveform curve).Therefore, when front-edge way is selected, the measurement on echo amplitude in the gate is influenced by the gate threshold (height).

The measurement of pitch interval can be done only when the gate is open, before measuring, you should select the measuring way: edge way and peak way. Then select single or double gate way. Under single-gate way, the measurement is the pitch interval at echo’s front edge or peak in the gate. Under double-gate way, the measurement is the pitch interval starting from the echo within gate A and ending at the echo in the gate B.

List of Operations

All operations are realized by direct triggering of different key(s) on the panel or combination of them. The following list shows the concrete icons, names and functions of panel keys.

Figure Name Function
       Direction At normal mode, Press Left/Right key to select function group; Press Up/Down key to select the functional menu. At full screen mode, Press Left/Right key to move the gate; Press Up/Down key to adjust the gain value.
Press Knob Enter Press “Enter” key for switch of multi-used function item. Primary or fine adjustment of function items (if available) can be selected via “Enter” key.
Gate Gate A Press “Gate A” key to switch to gate A menu quickly. Press this key continually to select Gate A start, Gate A width or Gate A height for adjustment of corresponding functions.
Gain step the gain step will display 12.0dB, 6.0dB, 2.0dB, 1.0dB, 0.5dB, 0.1dB and 0dB in cycle. Select suitable gain step for fast adjustment of gain.
Full Screen Full Screen In ASCAN mode, press “Full Screen” key to select normal mode and amplified mode of display.
Detection zone Press “Detection Zone” key to switch to detection zone menu quickly for adjustment of detection zone.
Next page Next page All function groups are arranged in different pages, press “Next page” key to go to expected page.
Full Gate Extend key To extend the display and show detail of waveform
Freeze Freezing During operation, press “Freezing” key to freeze the wave and data displayed on the screen. Press again for defreezing.
Save save The report will be automatically saved into the first empty memory section after the no.1 memory section.
Auto gain Auto gain Adjust the amplitude of the echo in gate to X % (10%~100%)of the screen height automatically.
Top

Memory

Peak

Memory

Press “Peak Memory” key to enable/disenable peak memory.
Argument

cut

Measure

Display

Press “Measure Display” key to select display method of measure result.
Setting Setting Shortcut key to select the function group of setting.
Probe Probe Shortcut key to select the function group of probe.
DAC AVG DAC/AV

G

Shortcut key to select the function group of DAC/AVG.
Auto Calibrate Auto C Shortcut key to select the function group of Auto C.
Soft power switch Start/shutdown the machine.
C Charge

LED

This LED (Green) illuminates during charging and goes off as charge ends.
A Alarm

LED

This LED (Red) illuminates as the gate alarm is effective.

Communication for the Instrument

The instrument is equipped with USB interface, can achieve communication with PC at up level. Connect the instrument with PC USB interface, and enter into the special operation software data view for the instrument at PC.
Data Communication
Connecting PC

USB connecting way one end of the standard USB cable connects with USB interface of the instrument, another end with USB port of PC. The instrument will upload the images and data saved through USB port to PC.
The customer software installed on PC can edit, save or print the images and data.

Charging the Battery

The status sign for battery on ELD reflects in real time the condition of battery voltage. When the battery voltage is to low, i.e. when the status sign for battery on ELD becomes the sign of under  voltage in the following, you have to charge the instrument as soon as possible.

The charging way is as follows (you can charge either with the instrument on or off):

  1. Insert the power plug of the power adaptor into the charging socket;
  2. Connect the power adaptor with 220V/50Hz local power supply, both the Charging indicator lamp (red) and rapid charging indicator lamp (green) light up;
  3. When the rapid charging indicator lamp (green) goes out, the battery is fully charged. In a normal case, you can charge full the battery in about 4.5 h.

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