GAOTek Flaw Detector With High Precise (Free Store Data)

Additional Information

Accessories:

Standard Accessories

Optional Accessories

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:

Description of Screen Display

Three Display Modes of Screen

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.

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.

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:

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:

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:

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:

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.

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:

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:

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:

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:

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):