GAOTek Flaw Detector with Automatic Calibration (3 Switch Gauge)

This portable Flaw Detector with Automatic Calibration

(3 Switch Gauge) can accurately inspect and diagnose

various defects (crack, inclusion and pinhole, etc.)

in a work piece and comes with an automated

3 switch gauge for measuring depth, level and

distance.

GAO-UFD-101

Description

Overview

GAOTek Ultrasonic Flaw Detector with Automatic Calibration (3 Switch Gauge) is a portable industrial non-destructive flaw detector. It can rapidly, easily and accurately inspect, locate, evaluate and diagnose various defects like crack, inclusion, and a pinhole in a work-piece without destruction. User can use this devise in a lab as well as in field. This device can be widely used in the fields that need defect inspection and quality control such as manufacturing industry, metalworking, iron & steel metallurgical industry, chemical industry, etc. It is broadly used in the active safety inspection and service-life evaluation fields like aerospace, railway transportation, boiler pressure vessels, etc. This is an essential instrument for non-destructive inspection industry.

Key Features

  • Automated switch three staff gauge (Depth d, level p, distance s).
  • Automated display precise flaw location(Depth d, level p, distance s, amplitude, sz dB).
  • Automated calibration of transducer Zero-point, Angles, Front edge and material Velocity.
  • Convenient to make and use DAC/TCG and AVG to evaluate the echo, the curve can be modified and compensated.
  • 500 independence setup, any criterion can be input freely, we can work in the scene without test block.
  • Big memory of 1000 A graph.
  • Gate and DAC alarm; Acoustic-optical alarm.
  • USB port makes communication with PC is easy.
  • The embedded software can be online updated.
  • Li battery, continuous working time up to 10 hours.
  • Display freeze.
  • Automated echo degree.
  • Angles and K-value.
  • Lock and unlock function of system parameters.
  • B scan and AWS D1.1.
  • Electronic clock calendar.
  • 14 standards of DAC.
  • Automated make video of test process and play; Connect the Upan, the length of video is unlimited.
  • Two gates setting and alarm indication.
  • High-speed capture and very low noise.
  • Automated gain and gain scan.
  • Peak Hold and Peak Memory.
  • Solid metal housing (IP65).
  • Automated calculate the size of 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 exports to excel.

Applications

  • Can be used to inspect, locate, evaluate and diagnose various defects like crack, inclusion, and a pinhole in a work-piece without destruction.
  • 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.
  • Can 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.

Technical Specifications

Range of scanning Range of scanning: 0 in ~ 339.7 in (0 mm ~ 10000 mm)

Steps: 2.5, 5, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 150, 200, 250, 300, 350, 400, 450, 500, 600, 700, 800, 900, 1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000

Adjusting Step: 0.0039 in (0.1 mm) 0.098 in ~ 3.39 in (2.5 mm~ 99.9 mm), 0.039 in (1 mm) 3.39 in ~ 339.7 in (100 mm ~ 10000 mm)

Resolution for Scanning 0.0039 in (0.098 in ~ 3.93 in) (0.1 mm (2.5 mm ~ 100 mm))

0.039 in (3.93 in ~ 393.7 in) (1 mm (100 mm ~ 10000 mm))

Range of Gain 0 dB ~ 120 dB
D-delay D-delay (μs): -20 μs ~+3400 μs

Steps: -20, -10, 0.0, 10, 20, 50, 100, 150, 200, 250, 300, 350, 400, 450, 500, 600, 700, 800, 900, 1000, 1500, 2000, 2500, 3000, 3400.

Adjusting Steps: 0.1 (-20 μs ~ 999.9 μs), 1 (1000 μs ~ 3400 μs)

P-delay P-delay: 0.0  99.99

Adjusting Steps: 0.01

Sound Speed 1000 m/s ~ 15000 m/s
 

MTLVEL

MTLVEL: 1000 m/s ~15000 m/s

10 Fixed Levels: 2260, 2730, 3080, 3230, 4700, 5920, 6300, 12000, 13000, 14000, 15000

Adjusting Steps: 1

Working or Measurement Mode Single probe (receiving and sending), double probe (one for receiving another for sending), transmission (transmission probe)
Frequency Range  0.5 MHz ~ 20 MHz
Gain Adjustment 0 dB ~ 120 dB

Adjusting Step: 0.0, 0.1, 0.5, 1, 2, 6, 12

Reject 0% ~ 80% of screen height, step: 1%
Vertical Linear Error ≤ 3%
Horizontal Linear Error Not more than 0.2% in the scanning range
Sensitivity Leavings ≥ 62 dB
Dynamic Range ≥ 34 dB
Resolving Power ≥ 36dB
Material Velocity 1000 m/s ~ 15000 m/s
Measurement Mode Single, Dual, and Thru
Alarm Three modes, i.e. forbidden wave, loss wave, and auto
A-Scan Display Area Full screen or local

A-Scan display freezing and de freezing A-Scan filing

Data Save 1000 A Scan images (including setting of instrument)
Standard Communication Interface with PC USB

 

Port Type BNC(Q9)
Measuring Unit mm/inch
Battery Li Battery 7.4 V 4800 mAh
Power Adaptor Input: 100 V ~ 240 V/50 Hz ~ 60 Hz

Output: 9 V DC/1.5 A

Working Temperature -4 °F ~  122 °F (-20 °C ~ 50 °C)
Working Humidity 20% RH ~ 90% RH
Port Type Lemo 01 or BNC
Overall Dimension (DxWxH) 1.96 in × 6.14 in × 9.44 in (50 mm × 156 mm × 240 mm)
Weight 2.20 lbs (1.0 kg) (with battery)

 

Packaging List

Sr. No. Item Description Quantity
1 Main Unit 1
2 1.5 A/9 V Power Adaptor 1
3 Probe Connecting Cable 2
4 Carrying Case 1
5 Instruction Manual 1
6 Straight Probe 3/4˝ 2.5 MHz (One)
7 Angle Probe 89   60°  4 MHz (One)

Optional Accessories

Sr. No. Item Description Remark
1 USB Cable USB
2 Communication Software for PC 1 Set

Additional Information

When the ultrasonic wave propagates in a job, one can detect the defect in it by the influence on the propagation of ultrasonic wave based on the acoustic characteristic demonstrated by the defect in the material. Based on this principle, by using ultrasonic wave one can measure such defects as crack, pinhole and inclusion in such media as metal, non-metal and composite, etc.

Fig. Basic working principle for ultrasonic detection

1.Overview of the Instrument

1.1 Designation of the Instruments Components

Fig. Outside Drawing of the Instrument

Functional Keyboard

Keys are included in three groups: Function group, usual key group and special function group; Usual key group comprises 9 key: Up, down, Left, Right, Gain, Cate, Next page, Range, Full screen. They are used for usual operating; and special function group consists of 6 keys: Save, Auto gain, Zoom, measure display peak memory, Dynamic record. Function group consists of 7 keys: on/off key, Setting, Probe, AutoCalibrate, DAC/AVG, System Config and Freeze. Overall arrangement of the whole face is as following picture. Overall arrangement of the whole face is as following picture.

Fig. Functional Keyboard

Operation Process:

Select setting — —>select probe type — —>auto calibrate probe and other settings >make curve (DAC, AVG——>save setting——>start flaw detecting The process is in Function group section

1.2 Using of Power Supply

It can work with plug-in power supply (AC, DC adaptor) or battery.

The detector will switch the power supply to adapter automatically when the power supply adapter is used.

The detector will switch the power supply to battery automatically when the power supply adapter is turned off. The batteries will be charged automatically which is equipped with battery, is power supplied with adapter.

1.3 Working with Battery

Indicator for charging

At higher left corner of horizontal scale, there are symbols for battery voltage:

Fig. Battery status display

If it shows the symbol for low voltage, you must stop detection immediately and use adapter or charge it.

Charging the Li Battery.

You can charge the Li battery by using an external battery charger. It is recommended to charge by using the power adaptor in the standard kit. Before using the charger, please read carefully the Operation Instructions for it. The continuous charging time for Li (4.8 Ah) battery is about 4 h ~ 5 h. During the charging, Rapid Charging indicator lamp (green) will light up; when the charging completes, the Rapid Charging indicator lamp goes out.

1.4 Connecting the Probe

Proper probe shall be connected when using to inspect. So long that you have a proper cable, and the working frequency is within proper range, any probe made by our company is suitable for this product. The probe connector is BNC.

The probe shall be connected to the socket at top of the instrument casing. Both connector sockets, have different function, sending socket at left (with T mark) and receiving socket at right (with R mark). With Single-Probe mode, the sending socket can be used only. When connecting a double-wafer (TR) probe (one wafer for sending, another for receiving) or two probes (one for sending, another for receiving), take care that the sending probe shall be connected to the sending socket and receiving probe to the receiving socket. Otherwise, it may result in loss or disorder echo waveform.

  1. Operation

2.1 Basic steps

  1. Keep the instrument ready;
  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; 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.
  5. 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.
  6. According to your application, ten independence setups can be applied, any criterion can be input freely, we can work in the scene without test block. Whether it needs to calibrate the instrument.
  7. Measure;
  8. Save the results, big memory of 1000 A graph.
  9. Turn off the instrument;

2.2 Starting the Instrument

Press , turn on the instrument, it will carry out self-test. After five seconds, the instrument come into operation mode。

2.3 Description about Screen Display

2.3.1 Three Display Modes of

A-scan at normal mode

Fig. A-scan at normal mode

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.

Fig.  A-scan at Enlarged mode

Manual B-scanning

 

 Fig. 3.7 B-scan mode

2.3.2 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, as that shown in fig. and at the same time, the current function in the current functional group will also be highlighted, as that shown in fig. Under Enlarged mode, the display of functional groups disappear.

2.3.3 Description about Symbols Displayed on Screen

Inthefigleft,echoamplitudeH=84%, depth to the reflector=0.61 in (1.57mm), surface distance= 0.98 in (25.14mm), echo times is 2, start of range=0.0mm, end of range=1.57 in (40.0mm)

In the fig left, echo amplitude(pixels) H=148, Angular distance= 1.08 in (27.68 mm)

Fig.Description about the display field in screen

2.3.4 Display of echo times

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

2.3.5 Description about other symbol

There some other symbols above functional menu.

Freeze and Communication symbol is beside the battery status symbol.

 * Freeze Freeze state
 ! Communication The instruments are communicating with PC.
  Angular distance distance from the incidence point to the reflector point
  Depth to reflector depth from the incidence point to the reflector point.
  Surface distance surface distance from the incidence point to the reflector 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 shows 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.
  Radian revise Abscissa and measure result is revised according to radian.

2.4 Overview of All Functions

The functions are included in 16 functional groups and several special functions.

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

No Group Functions Description
1 BASE RANGE, MTLVEL, D-DELAY, T-VALUE Basic adjustment 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/bSTAR, 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 for gain
3 B / V B-SCAN /A-SCAN、SCAN WAY/SCAN MODE、REVIEW/VIDEO、VIDEO NO
3 CFG1 DETECT/ REJECT, GRID/BRIGHTNESS, UNIT/ BUZZER, DATE/TIME
3 CFG2 LANGUAGE, COLOR SET, ABOUT
4 AWS INDICA/A START、REFRANCE、ATTEN 、RATING

Other special functions can be realized by Special Function (SF) keys. The functions of each SF keys are introduced in the following table.

Special Functions Description
Gain To adjust the gain step and the gain value
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.
Full-screen To switch over in full screen
Freeze To freeze waveform
Dynamic record On/off Dynamic record(video)
Memory Peaks Capture the max value of echo on the screen
Measure display Select the display mode of measure result on the screen
Enter (press the rotary knob) Switch of multi-menu, parameters, confirmation of functions
Next Page Switch function page
Zoom To extend the display and show detail of waveform
Auto gain Adjust the amplitude of the echo in gate to 80% of the screen height automatically
Save The report will be automatically saved into the first empty memory section after the No.1 memory section

2.5 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.

2.5.1 Selection of Functions

User can select a functional group by Right/Left key; select certain function by up / down key.

2.5.2Multipurpose Function Items

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

Function I Function II Functional group
GATE LOGIC ALARM GATE
aSTART bSTART GATE
aWIDTH bWADTH 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

2.5.3        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

2.5.4 Example of Function Operation:

Suppose that the function of RANGE in BASE functional group is selected currently, and you want to select ALARM under GATE, what do you do?

Firstly Select the GATE group by t 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.

  1. 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 workpiece and probe’s nature. The workpiece material will influence the transmission velocity of ultrasonic wave.

3.1 Detection Range (RANGE)

It is to set the measuring range for screen display during detection Range: 0 in ~ 393.70 in (0mm~10000mm)/0.1”~200"

If what selected currently is RANGE functional menu, then by pressing , it is allowed to shift between Rough and Fine adjustment.

Rough adjustment:  0.09 in (2.5 mm), 0.19 in (5 mm), 0.39 in (10 mm), 0.78 in (20 mm), 1.18 in (30 mm), 1.57 in (40 mm), 1.96 in (50 mm), 2.36 in (60 mm), 2.75 in (70 mm), 3.14 in (80 mm), 3.54 in (90 mm), 3.93 in (100 mm), 5.90 in (150 mm), 7.87 in (200 mm), 9.84 in (250 mm), 11.81 in (300 mm), 13.77 in (350 mm), 15.74 in (400 mm), 17.71 in (450 mm), 19.68 in (500 mm), 23.62 in (600 mm), 27.55 in (700 mm), 31.49 in (800 mm), 35.43 in (900 mm), 39.37 in (1000 mm), 78.74 in (2000 mm), 118.11 in (3000 mm), 157.48 in (4000 mm), 196.85 in (5000 mm), 236.22 in (6000 mm), 275.99 in (7000 mm), 314.96 in (8000 mm),354.33 in (9000 mm), 393.70 in (10000 mm).

Fine Adjustment

Range Step graduation
≤ 3.93 in (100 mm) 0.0039 in (0.1mm)
> 3.93 in (100 mm) 0.039 in (1 mm)

By <Next Page > key, switch the function page.

By <range>key select the functional menu for RANGE, and then adjust parameters for RANGE by the rotary knob.

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

3.2 Material velocity (MTLVEL)

Users are allowed to set the transmission velocity of ultrasonic wave in workpiece.

Range:         1,000m/s~15000m/s    or        0.0394in/µs~0.3937in/µs

If what selected currently is MTLVEL function menu, then by the key , it is allowed to shift between Rough and Fine adjustment.

Rough adjustment:

2,260m/s 0.089 in /µs Sound velocity of transverse wave in copper
2,260m/s 0.089 in /µs Sound velocity of transverse wave in copper
2,730m/s 0.107 in /µs Sound velocity of longitudinal wave in organic glass
3,080m/s 0.121 in /µs Sound velocity of transverse wave in aluminium
3,230m/s 0.127 in /µs Sound velocity of transverse wave in steel
4,700m/s 0.185 in /µs Sound velocity of longitudinal wave in copper
5,900m/s 0.233 in /µs Sound velocity of longitudinal wave in steel
6,300m/s 0.248 in /µs Sound velocity of longitudinal wave in aluminium

Operation:Fine adjustment:      Step is  1m/sor   0.0001 in/µs

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.

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

3.3 Display starting point (D-DELAY)

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 workpiece. If the pulse has to be started from the surface of workpiece, D delay must be set to 0.

Range Step
-20 µs~3400 µs 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.

3.4 Thickness of workpiece (T-VALUE)

It is to set the thickness of workpiece during detection.

Thickness range:        0.039 in ~ 39.37 in (1 mm~1000 mm)

Rough and Fine adjustment can be switched by the <Enter> key.

Rough adjustment:  0.09 in (2.5 mm), 0.19 in (5 mm), 0.39 in (10 mm), 0.78 in (20 mm), 1.18 in (30 mm), 1.57 in (40 mm), 1.96 in (50 mm), 2.36 in (60 mm), 2.75 in (70 mm), 3.14 in (80 mm), 3.54 in (90 mm), 3.93 in (100 mm), 5.90 in (150 mm), 7.87 in (200 mm), 9.84 in (250 mm), 11.81 in (300 mm), 13.77 in (350 mm), 15.74 in (400 mm), 17.71 in (450 mm), 19.68 in (500 mm), 23.62 in (600 mm), 27.55 in (700 mm), 31.49 in (800 mm), 35.43 in (900 mm), 39.37 in (1000 mm)

Fine Adjustment

0.0039 in (0.1mm) <3.93 in (100 mm)
  0.039 in (1mm) >3.93in (100 mm)

Operation:

  • Select BASE functional group By< range > key, and by up/down key, select the functional menu for T-VALUE, and then adjust parameters for T-VALUE by the rotary knob.
  • Users can shift the Rough and Fine adjusting mode by the <Enter> key.
  1. Adjustment of PROBE

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

4.1                PROBE TYPE/ PROBE POS

This menu is multipurpose for setting probe type and probe pos. By the <Enter>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; if it is a double-wafer probe, set it to DUAL, and if it is a through transmission probe, set it to THRU.

Options:

STRAIGHT: Single straight element transducers. Use connector acts as a transmitter (T)

ANGLE: Angle straight element transducers.Use connector acts as a transmitter (T)

DUAL: Dual element transducers. One connector acts as a transmitter (T), the other acts as a receiver (R).

THRU: Two separate transducers, typically on opposite sides of the test specimen. Use the T transducer connector as the transmitter. The R transducer connector is designated as the receiver.

Operation procedure:

  • Select PROBE functional group By < Probe > key, and by up/down key, select the functional menu for PROBE TYPE, and then adjust parameters for PROBE TYPE by the rotary knob.

PROBE POS

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:

  • Select PROBE functional group By < Probe > key, and by up/down key, select the functional menu for PROBE POS, and then adjust parameters for PROBE POS by the rotary knob.

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

This menu is multipurpose for setting probe angle and probe k value. By the <Enter> key, shift between ANGLE and K-VALUE.

ANGLE:

It is to adjust the angle of a probe.

Range Step
0.0 ~89.0 0.1

Operation:

  • Select PROBE functional group By < Probe > key, and by up/down key, select the functional menu for ANGLE, and then adjust parameters for ANGLE by the rotary knob.

K-VALUE:

Range Step
0.00~57.29 0.01

Operation:

  • Select PROBE functional group By < Probe > key, and by up/down key, select the functional menu for K-VALUE and then adjust parameters for K-VALUE by the rotary knob.

4.3 P-DELAY/ X-VALUE

This menu is multipurpose for setting p-delay and x-value. By the <Enter>key, shift between P-DELAY and X-VALUE.

P-DELAY:

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 workpiece by P Delay.

Range 0 µs~99.99 µs
Step graduation 0.01 µs

Operation:

  • Select PROBE functional group By < Probe > key, and by up/down key, select the functional menu for P-DELAY, and then adjust parameters for P-DELAY by the rotary knob.

X-VALUE:

It is to set the front edge of probe.

Range 0.00 in ~ 1.9685 in (0.00 mm~50.0mm)
Step 0.0039 in (0.1mm)

Operation:

  • Select PROBE functional group By < Probe > key, and by up/down key, select the functional menu for X-VALUE, and then adjust parameters for X-VALUE by the rotary knob.

4.4 X-COORD/ PART DIA

This menu is multipurpose for setting X-COORD and PART DIA. By the <Enter>key, shift between

X-COORD/ PART DIA.

X-COORD

Co-ordinate 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, the coordinate is defined as S-PATH.

Options: S-PATH, P-VAL, DEPTH

Operation:

Select PROBE functional group By < Probe > key, and by up/down key, select the functional menu for X-COORD, and then adjust parameters for X-COORD by the rotary knob.

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.

Range 0.196 in ~ 196.85 in (5.0 mm~5000 mm)
Step <3.937 in (100 mm)            0.00393 in (0.1 mm)

>3.937 in (100 mm)            0.0393 in (1.0 mm)

Operation:

Select PROBE functional group By < Probe > key, and by up/down key, select the functional menu for PART DIA, and then adjust parameters for PART DIA by the rotary knob.

  1. Adjustment of setting

Setting Group is used for Operations of detection setting. It includes SETTING, COPY, SAVE/MODIFY, DELETE/CLEAR ALL

5.1 Detection Setting (SETTING)

SETTING:

During the detecting in scene, users usually need to do the detection on several kinds of work piece or change the probe, thus they need to calibrate the instrument time after time. To solve this problem, 500 detecting settings are available. Users can set 500 different settings and save them, switch among the settings when it needed.

Parameter range:      NO.1~NO.100

Operation procedure:

  • By <Page up> key switch the function page.
  • By <F3> key select SET functional group, and by “↑” or “↓” key, select the functional menu for SETTING, and then adjust parameters for SETTING by the rotary knob.

5.2 Recall of settings (RECALL)/REFACTORY

This menu is multipurpose for gate logic and gate alarm. Users can shift the functions for RECALL and REFRACTORY by Enter key .

RECALL:

Recalling the setting in detection setting, when it is completed successfully, the current detection parameter setting will be replaced by the recalled one.

Operation:

  • By <Page up> key switch the function page.
  • By <F3> key select SET functional group, and by “↑” or “↓” key, select the functional menu for RECALL, RECALL, and then carry out calling by the rotary knob..
  • If current setting has no setting, by left and right key, this functional menu will always display OFF; if it has any setting, by “+” or “ ﹣ ” key, it will show “Yes/No”, if you press key    then you will call out setting, and by pressing any other key, you will cancel the calling.

REFACTORY:

Users can recover the ex-factory parameter setting when turning on the machine if necessary.

5.3 Saving settings(SAVE)/ Modify settings (Modify)

This menu is multipurpose for Modify and SAVE. Users can shift the functions for Modify and SAVE by the <Enter> key.

SAVE

This functional menu is for saving setting.

Operation procedure:

  • Select Setting functional group by < Setting > key, and by up/down key, select the functional menu for SAVE, and save the setting by the rotary knob.

Modify:

Modify the setting in detection setting, when it is completed successfully, the current setting will be modified by the current detection parameters.

Operation:

  • Select Setting functional group by < Setting > key, and by up/down key, select the functional menu for Modify, and then recall the setting by the rotary knob.

5.4 Delete settings (DELETE)/CLEAR ALL

This menu is multipurpose for DELETE and CLEAR ALL. Users can shift the functions for DELETE and CLEAR ALL by the <Enter> key.

DELETE:

Operation:

  • Select Setting functional group By < Setting > key, and by up/down key, select the functional menu for DELETE, and delete the setting by the rotary knob.
  • If current setting has no setting, by the rotary knob, this functional menu will always display OFF; if it has any setting, by the rotary knob, it will show “Yes/No”, if you press the <Enter> key then you will delete setting. And by pressing any other key, you will cancel the delete.

CLEAR ALL:

  • Select Setting functional group By < Setting > key, and by up/down key, select the functional menu for CLEAR ALL, and delete all the settings by the rotary knob.
  • By the rotary knob, the menu will show “Yes/No”, if you press the <Enter> key then you will delete setting. And by pressing any other key, you will cancel the clear.

6.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.

This instrument can memory 500 groups of test data and detection parameters as well as DAC curves from A-scan.

6.1     Function group MEM (DATA NO.)

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

Parameter range:        For waveform save, 0~500

MEM mode:                 waveform

Operation:

  • By <Next Page > key switch the function page.
  • By Left/Right key select MEM functional group, and by Up/Down key, select the functional menu for DATA NO, and then set group no. by the rotary knob.

6.2       Recalling a stored data set (RECALL)

It is to recall data under Waveform Save mode, and call out the data corresponding to current group No.. 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 <Next Page > key switch the function page.
  • By Left/Right key select MEM functional group, and by Up/Down key, select the functional menu for

RECALL.

  • 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 the rotary knob, it will show “Yes/No”, and now press the <Enter> key, the data will be recalled, and press any other key to cancel recalling.

6.3                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 <Next Page > key switch the function page.
  • By Left/Right key select MEM functional group, and by Up/Down key, select the functional menu for SAVE, and then set group no. by the rotary knob.

6.4 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 Left/Right key select MEM functional group, and by Up/Down key, select the functional menu forDELETE.
  • 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 the rotary knob, 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 Left/Right key select MEM functional group, and by Up/Down key, select the functional menu forDELETE.
  • By the rotary knob, the menu will show “Yes/No”, if you press the <Enter> key then you will delete all data. By pressing any other key, you will cancel the clear.
  1. Adjustment of GATE Group

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.
  • To measure the position and size of flaw echo.

It is equipped with double-gate function: Gate A and Gate B, normally Gate A is used alone for detecting the workpiece flaw, and the double-gate is usually used in the measuring and calibration of multi-echo, eg. Measuring the distance between surface echo and first echo during thickness measurement.

7.1                GATE LOGIC/ ALARM

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

GATE LOGIC:

Gate logic has four options: NONE, POS, NEG, and MUL.

Options:

NONE: gate monitoring is off

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

ALARM:

Setting of gate alarm.

It can be used for alarm of forbidden wave and loss wave depending on the setting of Gate Logic. That is, if the gate is at positive logic, when the echo amplitude is higher than the threshold, the buzzer alarms; if the gate is at negative logic, when the echo amplitude is lower than the threshold, the buzzer alarms. When the DAC is opened, the DAC-REF is instead of gate to determine alarms.

Options:

ON: the buzzer is on

OFF: the buzzer is off

Operation procedure:

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

7.2                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.

7.3                Width of the gates (aWIDTH/bWIDTH)

This functional menu is multipurpose for Width of Gate A and Gate B, when this menu is selected, by the <Enter > key, you can shift the two functions.

aWIDTH:

Operation procedure:

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

bWIDTH:

Operation procedure:

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

7.4                Response and measurement threshold (aTHRESH/bTHRESH)

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

a THRESH:

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 %~90 %

Operation procedure:

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

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 %~90 %

Operation procedure:

  • By the <Gate> key select GATE functional group, and by Up/Down key, select the functional menu for bTHRESH, and then adjust the bTHRESH by the rotary knob.
  1. Auto C (Automated calibration of transducer)

8.1 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 as what is shown in chapter 5. Straight probe can be calibrated with the following method.

For example of the standard straight probe which is frequency 2.5 MHz, diameter 0.78 in (20mm) and single. Two test blocks which are the same material with the measured object, and thickness determinate are needed.

Suppose that the probe is calibrated with two test blocks whose thickness is 1.96 in (50mm) and 3.93 in (100 mm), the operation steps are as following:

  1. set the sound speed value to 5900 approximately, and set the zero value of probe to 0.00 us;
  2. adjust the gate logic to single gate;
  3. adjust the detecting range to make the echo over 3.93 in (100 mm) can be displayed on the screen;
  4. couple the probe on the thin test block(1.96 in (50 mm)), move gate A start to echo and cut with it.
  5. Select CSBT in group Auto C (Automated calibration of transducer) by the < Auto Calibrate > key, confirm the sound distance, then the gauge will adjust the gain automatically to make amplitude of the largest echo in gate equal 80 % of the screen, and at the same time, a number appears in the probe calibration menu, adjust this number to make it the same with actual S-PATH of test block, that is 1.96 in (50mm).
  6. Couple the probe on the thick test block(3.96 in (100mm)), move gate A start to echo and cut with it.
  7. Select the probe calibration menu in group PROBE, confirm the sound distance, then the gauge will adjust the gain automatically to make amplitude of the largest echo in gate equal 80 % of the screen, and at the same time, a number appears in the probe calibration menu, adjust this number to make it the same with actual S-PATH of test block, that is 3.96 in (100 mm).
  8. Press the ENTER key to confirm and finish the calibration, now the material sound speed and probe zero point of gauge will get to accurate value automatically.
  9. Before step 8, the key <FREEZE> can be used to cancel calibration.

8.2 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 what is shown in chapter 5. Angle probe can be calibrated with the following method.

IIW TYPE2

For example of the standard angle probe which is frequency 4MHz, wafer 0.31 in × 0.35 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.

Fig. 50/100 echo

  1. 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 mm, please read it and input it.
  2. By the <Enter > key you can see ANG echo, then put your probe, Try to find the highest echo ofthe hole (φ50), then press , you will see ANG=XXX.X.

Fig. ANG ECHO

8.3 Starting of the A gate (a START) / Width of the A gate (a WIDTH)

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

8.4 TYPE (Types of calibration)

IIW TYPE2 and Two holes. Two kinds of calibration are only different for angle probe, the calibration of straight probe is only one way.

  1. 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

9.1 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.

TCG:

It is to turn on/off the TCG display. It will be ineffective when B-scan, AVG, DAC is on.

Options: ON, OFF

Operation:

  • By the <DAC/AVG> key select DAC1 functional group, and by the <Enter> key, select the functional menu for TCG, and then adjust the TCG by the rotary knob.

9.2 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:

  • By the <DAC/AVG> key select DAC1 functional group, and by Up/Down key, select the functional menu for RECORD.
  • 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.
  • 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

9.3 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 point. If the curve is not well drawn due to some plotting point with big plottingerror, users can select the corresponding plotting point and adjust the gate to corresponding position, re-plot thatpoint 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.

9.4 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.

10.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, 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), 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.

10.1 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-RL, and then set the offset of DAC evaluating line by“←” or “→” key.
  • By key , shift between DAC-RL 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:

  • By <Page up> key switch the function page.
  • 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.
  • By key , shift between DAC-EL and DAC-REF

10.2 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.

10.3 DAC evaluating line (DAC-EL)

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.

10.4 DAC test standards (STANDARD)

There are 14 standards. “Custom ,GB/T 11345-89A ,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 freelyand 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 workpiece 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.

11.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, REF TYPE/REFSIZE

11.1 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.

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.

11.2 Probe name

Users are allowed to input the name of the probe,the maxim character number is eight.

Option: ASCII character

Operation:

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

11.3 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.

11.4 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: 0.0196 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.
  1. Adjustment of AVG2 Group

The AVG2 group is for plotting a AVG curve and setting the parameters necessary for plotting a AVG curve. It includes A start/AVG CURVE, RECORD REF, CORRECT/TEST ATTN

12.1 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: 0.011 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.

12.2 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.
  • By the <DAC/AVG> key select AVG1 functional group, and by Right key, select AVG2 functional group, select the functional menu for RECORD REF.
  • Move gate A to echo we need by left or right key.
  • Adjust gain to make echo amplitude equal to 80% of screen.
  • Record reference value by the rotary knob+.
  • We can revise the value by deleting it (the rotary knob-) and recording it again.

12.3 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.
  1. 13. Adjustment of Pulse Group

13.1 ENERGY

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.

13.2 Pulse Width

The function is used for plotting AVG curve.

Option:30 ns ~ 300 ns

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 Pulse Width, and then set pulse width by the rotary knob.

14           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.

14.1 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.X+0.0 dB, 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:

  • 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 REF GAIN, and then set ON/OFF for REF GAIN by the rotary knob.

14.2 Add reference (ADD REF)

We can add scan gain to reference gain.

Options: ON, OFF

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 ADD REF, and then set ON/OFF for ADD REF by the rotary knob.

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

SCAN DB: We can switch scan gain value between Setting value and 0 dB.

Options: ON, OFF

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 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 forAUTO GAIN, and then setX % by the rotary knob.

14.4 Gain correction (T-KORR)

T-KORR:Set the CORRECT GAIN.

Parameter range:      0 dB~60 dB     step: 0.1 dB

Operation:

  • By Left/Right key select GAIN functional group, and by Up/Down key, select the functional menu forT-KORR, and then set correct gain by the rotary knob.
  1. Adjustment of B/V Group

B-scan is used for the area difficult to detect and displaying the section plane graph data of this area, the graph shows how the flows locate in the scanning direction in work piece. B-scan can be set beforehand, including B-SCAN/A-SCAN, and SCAN WAY.

15.1 B scan mode select (B-SCAN)/ A scan mode select (A-SCAN)

This menu is multipurpose for B scan mode select and A scan mode select.

B-SCAN

The switch on/off of B-scan mode. When B-scan is turned on, B-scan mode will be displayed on screen. And when DAV curve is turned on, the switch of B-scan mode will not work. Option: ON,OFF

Operation procedure:

  • By <Next Page > key switch the function page.
  • By Left/Right key select B/V functional group, and by Up/Down key, select the functional menu for B-SCAN, and then set ON/OFF for B-SCAN by the rotary knob.

A-SCAN

The switch on/off of A0-scan. When the B-scan is on, turn on A-scan, the screen will both of them half and half.

Option: ON,OFF

Operation procedure:

  • By <Next Page > key switch the function page.
  • By Left/Right key select B/V functional group, and by Up/Down key, select the functionalmenu for A-SCAN, and then set ON/OFF for A-SCAN by the rotary knob.

15.2 Scan way (SCAN WAY)

This menu is multipurpose for SCAN WAY/SCAN MODE; by the <Enter> key, shift the two functions.

Scan way determines the refresh way. “left right” and “right  left” are available.

Option: L->R、R->L

Operation procedure:

  • By <Next Page > key switch the function page.
  • By Left/Right key select B/V functional group, and by Up/Down key, select the functional menu for SCAN WAY, and then set ON/OFF for SCAN WAY by the rotary knob.

Scan mode determines the refresh mode.

Option: ONCE, CYCLE

Operation procedure:

  • By <Next Page > key switch the function page.
  • By Left/Right key select B/V functional group, and by Up/Down key, select the functional menu for SCAN MODE, and then adjust option for SCAN MODE by the rotary knob.

15.3 VIDEO/REVIEW

This menu is multipurpose for making video and review.

We can make and play the video of test process on the screen through this function. Option: On, Off

Operation:

  • By <Next Page > key switch the function page.
  • By Left/Right key select B/V functional group, and by Up/Down key, select the functional menu for VIDEO/REVIEW, and then select the functional menu for VIDEO/REVIEW by the rotary knob.

15.4 VIDEO NO.

It is for setting the VIDEO NO.

Parameter range:        For the video of test process, 0~9

Operation:

  • By <Next Page > key switch the function page.
  • By Left/Right key select B/V functional group, and by Up/Down key, select the functional menu for VIDEO NO, and then set VIDEO NO. by the rotary knob.
  1. Adjustment of CFG1 Group

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

16.1                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.

16.2              GRID/ BRIGHTNESS

This menu is multipurpose for Scale and Brightness.

GRID:

It is to set the displaying way of coordinate grid.

Options:  0~3

Operation:

  • By the <System Config> key select CFG1 functional group, select the functional menu for GRID and then set the displaying way of coordinate grid by the rotary knob.
  • Users can shift the functions for GRID and BRIGHTNESS by Enter key.

BRIGHTNESS:

It is to set the brightness of the screen.

Options:  Max, High, Mid, Low

Operation procedure:

  • By the <System Config> key select CFG1 functional group, select the functional menu for BRIGHTNESS and then set the brightness of the screen by the rotary knob.

16.3 Sound of the Buzzer (BUZZER)/Selecting the units (UNIT)

This menu is multipurpose for setting buzzer and unit.

BUZZER:

It is used to turn ON/OFF the buzzer.

Options: ON, OFF

Operation:

  • By the <System Config> key select CFG1 functional group, select the functional menu for BUZZER and then set ON/OFF of the buzzer by the rotary knob.
  • Users can shift the functions for BUZZER and UNIT by Enter key.

UNIT:

It is to select the unit for detection parameters of the instrument.

Options: mm, inch

Operation:

  • By the <System Config> key select CFG1 functional group, select the functional menu for UNIT and then select the unit by the rotary knob.

16.4 Setup Date (DATE)/Setup Time (TIME)

The functional group of Time is for adjusting and setting the real-time clock for the detector. It includes YEAR, MONTH, DAY, HOUR, MINUTE, when this menu is selected, by the <Enter> key, you can shift the five functions then adjust parameters by the rotary knob.

In the function of date, date form is M.D.Y, and in time function, time form is H:M.

Month Setting: setting the month.

Parameter range: 1~12

Day Setting: setting the day

Parameter range: 1~31

Year Setting: setting the year

Parameter range: 2000~2099

Hour Setting: setting the hour

Parameter range: 0~23

Minute Setting: setting the minutes

Parameter range: 0~59

  1. Adjustment of CFG2 Group

Settings of LANGUAGE, Color set.

17.1   Selecting the language (LANGUAGE)

LANGUAGE:

To set the language of displaying.

Options: English, DE, PB

Operation:

  • By the <System Config> key select CFG2 functional group, select the functional menu for LANGUAGE and then select the language by the rotary knob.

17.2    COLOR SET

This menu is for COLOR SET;

COLOR: (Only for colorful display)

There are five projects of color for our system.

Option:0,1,2,3,4

Operation:

  • By the <System Config> key select CFG2 functional group, select the functional menu for COLOR SET and then select color set by the rotary knob.

17.3      PC MODE

This menu is for PC MODE;

PC MODE:

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 PC mode for the instrument to communicate with PC.

Option: Open, Close

Operation:

  • By the <System Config> key select CFG2 functional group, select the functional menu for PC MODE and then open the pc mode by the rotary knob.

17.4              About

This menu is for ABOUT;

ABOUT:

Information of manufacture.

Option: Open, Close

Operation:

  • By the <System Config> key select CFG2 functional group, select the functional menu for About and then open the information of manufacture by the rotary knob.
  1. AWS Group

The AWS menu provides a means for evaluation discontinuities when inspecting welds in accordance with the American Welding Society’s Structure Welding Code, ASNI/AWS D1.1-94. The user is referred to the AWS standard for all details of the method.

The AWS menu provides a convenient method of automatically calculating the””Indication Rotating (IR) as defined by the standard. The AWS menu can be used in conjunction with the trigonometry mode which will simultaneous indicate beam path, surface distance and depth distance at the bottom of the graticule.

D Rating A INDI – B REF – C ATTEN
D Rating Is the difference in dB between the indication and the reference gain with attenuation factor correction
A INDI Is the dB setting required to bring an indication to the reference level
B REF Is the dB setting of the calibrated reference indication as a function of the reference standard and probe being employed.
C ATTEN Is the attenuation factor required by the AWS standard.

C=0.079 dB/mm(s- 1 in (25.4 mm)) s=sound path of flaw echo. C ATTEN is automatically calculated

Byunit When the S <= 1 in (25.4mm)C ATTEN is 0

For example

  1. Record defect amplitude is 40 dB (A)
  2. Record reference echo amplitude (B) 36 dB and distance (C) 3 inch
  3. 40-36-4=0

Note:

AWS only work with AWS size and Frequency Probes.

To set the AWS measurements, perform the following

  • Calibrate the probe
  • Set Velocity.
  • Set right display range
  • Put the probe on test block reference hole, For example IIW Type I, 0.059 in(1.5 mm) dia. Hole.Adjust the gain until back echo raise to 80% full screen
  • Press “FN” key move the highlight cursor to “AWS” position. Select AWS REFRENCE dB,
  • Press “ Gate”, move aGate across the echo, adjust the gate length, high
  • Press “+” key to get REFRNCE dB. Now the instrument will automatically adjust the gain, the echo in the aGate will automatically raise or decrease to 50% full screen.
  • After complete AWS setting, it can start inspection
  • Move the probe detected the flaw.
  • Move aGate cross flaw echo.
  • Select AWS INDICA dB, press “+” key to get INDICA dB.
  • Now the instrument will automatically adjust the gain, the echo in the aGate will automatically raise or decrease to 50 % full screen.
  • Now the instrument will automatically calculate the ATTEN and RATING.

19     Adjusting of Special Functions

19.1              Gain

By pressing the <Gain> key, shift the two functions: gain value and gain step.

Gain step:

Options:  0 dB, 0.1 dB, 0.5 dB, 1.0 dB, 2.0 dB, 6.0 dB and 12.0 dB

Operation procedure:

  • By pressing the <Gain> key, the gain step will be highlight.
  • By the rotary knob, the gain’s step graduation will change cyclically in the option.

Gain value:

Parameter range: 0 dB~120 dB Operation procedure:

  • By pressing the <Gain> key, the gain value will be highlight.
  • By the rotary knob, the gain value will be adjusted.
  1. Save

The report will be automatically saved into the first empty memory section after the No.1 memory section.

19.3    Full-screen

It is used to switch between full-screen display and normal display for waveform.

Operation:

  • Users can switch over full-screen and normal display modes by pressing full-screen key.

19.4   Freeze

It is used to freeze the waveform.

Operation procedure:

  • The gauge can be switched between freezing and non-freezing by the Freeze key.
  • Under Freeze state, prompting icon * appears in the status line.

19.5 Peaks Memory

Peaks Memory is used for users to conveniently find out the flaw peak and estimate the flaw accurately.

Operation:

  • By pressing < >key, we can open and close the function.

Under peaks memory state, prompting icon ‘P’ appears in the status line.

19.6 Zoom

It is used to extend the waveform for details by the key.

Operation:

Loop the waveform to be observed by gate, press down the key, then the extended waveform will be displayed.

19.7 Test Data Display

We can select display method of measure result on the top right corner of display area. One of S-path, Projection and Depth will be displayed here and the other two will appear in the status bar. When dB is displayed, values S-path data got from DAC curve will appear on the screen. If DAC curve is turned off or the waveform in gate is over the screen, dB will appear as “*”.

Options: S-PATH, P-VAL, DEPTH, VAL-SZ, VAL-mm

Operation:

  • Press “Measure Display ” key to select display method of measure result.

19.8 Auto gain

Adjust the amplitude of the echo in gate to X %(10%~100%) of the screen height automatically.

19.9 Dynamic record

On/off Dynamic record,make video of test process.

19.10 Resetting the Ex-factory Setting

Users can recover the ex-factory parameter setting when turning on the machine if necessary.

Operation:

  • When it displays the progress bar for Turn on screen by pressing key <Down>and , you can recover the ex-factory setting.

19.11 Instrument program upgrade

It provides online upgrade function, and operator can perform program upgrade process by tools Data View after getting necessary upgrade files.

Operation:

  • Connect interface of the instrument and PC by the special-purpose communication cable
  • If the instrument cannot set up normally, operator can press the keys of Left+  when it displays the progress bar for Turn on screen. Thus, the instrument will keep the turn on screen but not shift to the operation interface.

Finish program upgrade according to 《Operation Instructions for PC Data Processing Software》

  1. 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 calibrated shall be calibrated by a professional technician from field of ultrasonic detection.

In order to illustrate well the calibrating way and steps, examples will be given later.

20.1     Calibrating of Single Probe

You should determine the calibrating procedures depending on the known condition of sound speed and probe delay. If the sound speed is unknown, you first calibrate the sound speed by way of “Two Points”; if the sound speed is known, calibrate the probe delay by one-point way after adjusting the sound speed into the known one.

20.1.1 Calibrating with Known MTLVEL

Procedure:

  • The MTLVEL setting is the known sound speed of the material,
  • Couple the probe with the calibrating test block,
  • Set the Gate Logic into Single-Gate mode, i.e. Positive or Negative logic, loop the gate on the primary echo, now the pitch interval measured is the pitch interval at primary echo,
  • Adjust the probe delay, so that the measurement of pitch interval in the status line is the same with the known thickness of the test block.

20.1.2 Calibrating with Unknown MTLVEL

Procedure:

First set a rough sound speed value;

  • Adjust the gate logic into Double Gate mode;
  • Couple the probe with a test block for which the thickness is known and that is of the same material with the job;
  • Move the start of gate A to the primary echo and make them intersect, adjust the height of gate A to be lower than the max. amplitude of primary echo and to a proper position, and gate A shall not intersect with the secondary echo;
  • Move the start of gate B to the secondary echo and make them intersect, adjust the height of gate B to be lower than the max. amplitude of secondary echo and to a proper position, and gate B shall not intersect with the primary echo;
  • Then adjust the sound velocity, so that the pitch interval displayed in the status line is same with the actual thickness of the test block. The sound velocity got now is the actuate sound velocity under this detection condition;
  • Set the Gate Logic into Single-Gate mode, i.e. Positive or Negative logic, the pitch interval measured at this time is the pitch interval at primary echo;
  • Adjust the probe delay, so that the measurement of pitch interval in the status line is the same with the known thickness of the test block. The probe delay measured at this time is the exact P delay of this probe.

In the following we’d like to illustrate by an example:

Fig. Calibrating with unknown MTLVEL

MTLVEL is unknown, set the approximate MTLVEL as 5920m/s, set the Gate Logic as double gate mode, meanwhile set the P delay as 0;Couple the probe with a calibrating test block of 50 mm, and adjust the gate A to a position intersecting with the primary echo, Adjust gate B to a position intersecting with secondary echo.

Increase MTLVEL, till the displayed pitch interval between the primary and secondary echo is 50mm, now we get the exact sound velocity of the material, i.e. 5891m/s;Set again the gate as Single Gate mode, measure the pitch interval at the primary echo, adjust continuously P Delay till the pitch interval measured at the primary echo is 50 mm, now we get the exact P Delay, i.e. 0.05us.

20.2 Calibrating of Double Probe

Calibrating procedure:

  • Set double-probe state in PROBE group;
  • Set the pitch interval, functional items in PROBE group depending on current testing task and probes selected;
  • Couple the probes with the calibrating test block, adjust the P Delay in Base group till the calibrating echo approaches to the desired position, meanwhile the secondary echo is also within the display range;
  • Adjust the gain till the echo with the max. amplitude approaches to the full-screen height;
  • Turn on double gates in Gate group;
  • Select Front-edge measuring way in CFG group;
  • Move the start of Gate A to the primary echo and intersects with it, and Gate A shall not intersect with the secondary echo;
  • Move the start of Gate B to the secondary echo and intersects with it, and Gate B shall not intersect with the primary echo;
  • Adjust gate heights, so that they are at the same positions of the front edges of two standard echoes;
  • Change the sound velocity, till it displays the thickness value of the standard test block;
  • Set the Gate Logic into Single-Gate mode, i.e. Positive or Negative logic, the pitch interval measured at this time is the pitch interval at primary echo;

Adjust the probe delay, so that the measurement of pitch interval in the status line is the same with the known thickness of the test block.

20.3   Calibrating of Angle Beam Probe

Calibrating of angle beam probe is usually as following:

  1. Calibration of incidence angle (X-Value);
  2. Calibration of probe angle (K-Value);
  3. Calibration of materialsound speed;
  4. Calibration of probe Zero point
  1. Calibration of incidence angle (X-Value): Test the probezero point with ⅡW test block (Holland test block) orCSK- Ⅰ A test block, firstly adjust the sound speed to3230m/s, detecting range to 5.90 in (150mm), then start the testing, locate the probe on test block and move it as the rightfigure to make sure you have got the highest echo on R100mm reflector, measure the distance, which is theX-Value of probe, between the front face of probe and cycle center of R100m arc. The point corresponding to the cycle center of R100mm arc is just the incidence point of probe.

  1. Calibration of probe angle (K-Value): the probe plottedwith angle value can be calibrated with Ⅱ W test block, and the probe plotted with K-Value can be calibratedwith CSK- ⅠA test block. Both the two kinds of testblocks have the scales of angle and K-Value, select theproper scale for the probe(as shown on the figure,on the upside of ⅡW test block probe of 60~76 degreescan be calibrated, the downside is suitable for the probeof 74~80 degrees. And on the upside of CSK-ⅠA testblock probe of K2.0, K2.5, K3.0 can be calibrated, the downside is suitable for probe of K1.0, K1.5). Locatethe probe as the figure shows, move the probe back and forth to make sure you have got the highestecho, and now the scale corresponding with incidence point is the probe angle or K-Value.

 

When the focus on angle menu, press  key , we can input L value (above picture ), and then press  key again, the unit will calculate the angle value.

  1. Calibration of sound speed: find out the highest echo in item 1, and adjust the detecting range to make sure the second echo of this echo can be displayed on the screen, switch the gate mode to double gate, adjust the A gate to cut with the first echo, and adjust B gate to cut with the second echo, adjust the sound speed to make the value of sound path(S) be 100, now the sound speed value you get is the actual sound speed.
  2. Calibration of probe zero point. Keep the testing status above, and change the gate mode to plus or minus, adjust the probe zero point to make the value of sound path (s) return to 100, now the zero point value is the actual zero point value.

Angle beam probe can be calibrated in many ways, not only by standard test blocks, it can also be done with a thickness known hole, theoretically, smaller of the reference reflector more accurate calibration you will get, however, it will be more difficult to do so. When calibrating with holes, we can do the calibration on angle by working out slope through measuring the depth and level position of hole, and with which processing the calibration of sound speed and probe zero point.

20.4 Application of DAC Curve

DAC curve is used for distinguishing the reflectors with the same size and different distance. Normally, in work piece, reflectors with the same size and different distance cause change in amplitude because of the attenuation of material and pervasion of beam. The DAC curve compensate for attenuation of material, magnetic field influence, pervasion of beam and surface smoothness in the way of graph. Normally, the echo peak points are all located in the same DAC curve. And in the same way, the echo created by smaller reflectors will be located under this DAC curve, and the bigger one will be above the curve.

  1. Selection of detecting setting. Select the setting function group by the key <Setting>, adjust the detectingsetting number, choose one as the current instrument setting, Ex., No.1, (Note: One group of DAC plotting points can be saved in one setting, and they are saved automatically, not needing any operation, if you want to save the parameter setting at the same time, turn to the operation “SAVE”.)
  2. Turning on DAC curve function. Select the DAC1 function group through the key <DAC/AVG>, and thenselect the DAC curve function through S1 and up/down keys, (if the DAC curve function doesn’t lie in the current menu, please switch it by the <Enter> or S1, plot the revision function), set the DAC curve switch By the rotary knob.
  3. Making DAC curve. Select the DAC1 function group through the key <DAC/AVG>, Add plotting points when two plotting points are finished, the DAC curve will be protracted automatically. (Note: Plot the points in the order of small to large according to the detecting range, and the echo height of latter one must not be higher than the fore one, otherwise, the DAC curve will be a beeline.)
  4. Adjust the offset of the three offset curves. Select the DAC2 function group, adjust the three offset curvesviz. DAC-EL, DAC-SL and DAC-RL to proper settings.
  5. Compensation for surface roughness. Select the DAC2 function group t, adjust the gain correct menu tocompensate for the surface roughness of work piece, for example, when 5 dB is needed, just adjust the gain correct to -5 dB, and now the three DAC curves will go down for 5 dB.
    1. The completed DAC curve:

Fig.DAC curve

The screen is divided into three areas I, II and III. The three curves will be drawn on the screen during the detecting; users can determine the flaw character by the height of the echoes.

20.5 Contents of Measurement

To use the detector for measuring, you shall carry out the following works:

Set the start of gate, gate width, gate threshold and gate alarming way.

Contents of measurement are:

S                   Pitch interval

H (%)            Relative value of echo height in gate range (relative to the screen height)

h                  Absolute value (in pixel) of echo height in gate range

d                  Depth of defect

D (%)            Relative value of defect depth (relative to job’s thickness)

P                   Horizontal distance of the defect from the probe’s front edge

As for the meanings of above parameters, please refer to the following figure.

Where:

s: Pitch interval;

d: Depth of defect;

t:Thickness of job;

x: Distance of ultrasonic source to the probe’s front edge;

p: Horizontal distance of the defect from the probe’s front edge;

D: Is the relative value of defect depth, it is obtained by the following formula:

D      dt

Matters needing 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.

  1. 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.

21.1 Data Communication

21.1.1 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.

  1. Maintenance and Repairing

22.1 Requirement on Environment

Avoid seriously bumping, heavy dust, damp, strong magnetic field and greasy dirt, etc.

It is strictly forbidden to wipe the casing with any solvent substance.

22.2 Charging the Battery

The status sign for battery on ELD reflects in real time the condition of battery voltage. When the battery voltageis too 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 220 V/50 Hz 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.
  4. Pull off the charging plug, the charging ends.

 

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