Basic functions of the instrument

1. Display freezing: catch waveforms and sound path data at any moment, and the gate can be moved after freezing to measure the echo parameters
2. Alarming function: afferent echo/echo loss alarming
3.  Automatic gain: automatically adjust the gain to the preset amplitude height
4. Flaw positioning: real-time display sound path S, horizontal X, depth Y, and wave height H
5. Real-time clock: automatically record and store the date and time of waveforms
6. Wave height reading: three display modes, namely relative wave height, dB difference relative to the gate, and dB difference relative to DAC curve
7. Wave peak memory: real time envelopes show the highest wave of the flaws and record the maximum value of the flaws, it is helpful to position the flaws precisely and scan the work piece quickly. With the help of envelope waveform, the quality of the flaws can be determined.
8. True color TFT LCD whose brightness is adjustable, with many color schemes to choose free
9. When using transverse wave to detect flaws, the depths of the second and third waves are automatically calculated according to the slab thickness.
10.  Data communication: Communication with the computer through RS-232 port to transmit waveforms and data so as to manage the result of detection on the computer, and generate the flaw detection reports, as well as print out reports
11.  Digital Inhibition: 0-80%, increasing by 1%, not affecting the linearity and gain.
12. Two independent measurement gates, monitoring the echo amplitude and the sound path distance.
13. The perfect DAC curve functions enable the curves to change according to the displacement of the gain and the sound path.

Operation Instructions

Basic Menu Functions:

Press   to start the menu.

Sound Path

On the sound path submenu, you can make the adjustment of the display range, i.e., the frequency of the echo displayed. The range is from 0.98 in to 177.16 in (25 mm to 4500 mm).

On the parameter menu, press  (up) or  (down) to select the sound path submenu, then press (left decrease) or  (right increase) to adjust the values.

On the sound path submenu, press OK    to adjust the steps. The steps are 1, 10, 25, and 100.

Sound Velocity

On the sound path submenu, you can adjust the velocity of the ultrasonic wave transmitted in the detected work piece. The range of adjustment is from 1000 m/s to 9999 m/s.

On the parameter menu, press  (up) or   (down) to select the sound path

Sub-menu, then press  (left decrease) or   (right increase) to adjust the  values.

On the sound velocity submenu, press Ok  to adjust the steps. The steps are 1, 10, 100 and V-V. When V-V is selected, you can switch between two pre-set velocities, namely 5920 m/s or 3240 m/s.

Displacement

The displacement submenu displays the starting point of the screen. When the value is adjusted, the waveform will move horizontally. The adjustment range is from 0 mm to 2000 mm.

On the parameter menu, press  (up) or   (down) to select the displacement

Sub-menu, then press  (left decrease) or  （right increase) to adjust the values.

On the displacement submenu, press OK  to adjust the steps. The steps are 1, 10, 25, and 100.

Gain

The gain submenu enables you to adjust the sensitivity of the instrument. Its unit is dB. The higher is the gain, the more sensitive the instrument is, and vise versa. The adjustment range is from 0 dB to 110 dB.

On the parameter menu, press   (up) or   (down) to select the gain submenu, then press   (left decrease) or   (right increase) to adjust the values.

On the gain submenu, press Ok   to adjust the steps. The steps are 0.1, 1.0, 2.0 and 6.0.

Compensation

Owing to the different degrees of roughness of surface of the detected object and the test block calibrating the instrument, in the practical detection, you need to increase (or decrease) the sensitivity of instrument to reduce the influence caused by the surface of the detected object. The range of adjustment is from -40 dB to +40 dB. The values used in the adjustment are related to the gain values.

On the parameter menu, press   (up) or  (down) to select the compensation

Sub-menu, then press   (left decrease) or   (right increase) to adjust the values.

On the compensation submenu, press Ok   to adjust the steps. The steps are 0.1, 1.0, 2.0 and 6.0.

Scale

This function enables you to adjust the display mode of the screen coordinate.

On the parameter menu, press  to activate the function. Press  (up) or   (down) to select the scale submenu, then press  (left) or  (right) to switch among various display modes.

S Sound Path: the actual distance of the sound wave from the surface of the work piece to the flaw.

X Horizontal Distance: the horizontal distance of the sound wave from the point of incidence to the flaw.

Y Vertical Distance: the vertical distance of the sound wave from the surface of the work piece to the flaw.

Reject

After you adjust to a value, the echo below the value can be cleaned. For instance, you can remove the structural noise of the detected work piece. The reject setting is shown by % on the screen, and the adjustment range is 0-80%.

On the parameter menu, press  to activate the function. Press  (up) or   (down) to select the reject submenu, then press   (left) or  (right) to adjust the values.

Wave Height Readings

 Ha% – The percentage of the waveform accounting for of the screen height in windows.

dBa – The dB difference of the waveform relative gate can be shown in windows. When you use this function, you should use Gate A to catch the echoes. Otherwise, it will result in error in reading.

SL – In the windows, the dB difference of the quantitative line relative to DAC curve will be shown. If there is no DAC curve, then it displays SL -.

Setting Menu

 Press   to select the setting menu.

Waveform Filling

This function enables you to adjust the waveform displaying mode.

Select the setting menu, press  (up) or  (down) to select the waveform filling

Submenu, then press   (left) or  (right) to select off or on. Off refers to enveloping, and On refers to filling.

Color Scheme

You can use the function to adjust the colors on the screen.

Select the setting menu, then press  (up) or  (down) to select the color scheme

Sub-menu. Then press  (left) or   (right) to choose one of seven color schemes.

Lighting 

You can use this function to set the display lighting.

Select the setting menu, the press  (up) or   (down) to select the lighting submenu. Then press  (left) or   (right) to choose high lighting or low lighting.

Alarming

You can use this function to set whether there is an alarm.

On the setting menu, press  to activate the function. Press  (up) or  (down) to select the alarming submenu. Then press  (left) or  (right) to set the alarm. Off refers to turning off the alarm, while On refers to turning on the alarm.

Automatic Wave Height

You can use this function to set the percentage of the height of the automatic gain waveform on the screen. The default status is 80%.

Select the setting menu, press  (up) or  (down) to select the automatic wave height sub-menu. Then press  (left) or  (right) to adjust the values.

The maximum value is 80%, while the minimum is 20%.

Date

On the setting menu, press  to activate this function. Press  (up) or   (down) to select the date submenu. Then press  (left) or  (right) to set the date.

Press Ok    to switch among year, month, and day.

Time

On the setting menu, press  to activate this function. Press  (up) or   (down) to select the time submenu. Then press  (left) or  (right) to set the time.

Press Ok   to switch among hour, minute, and second.

Parameter Resetting

Select the setting menu, press (up) or    (down) to select the parameter resetting submenu. Press  (left) or  (right) to choose whether to reset the parameters, and press Ok  to reset the factory defaults. If you want to cancel the resetting, press any key.

In the setting menu, 10 submenus are displayed on two screens, the former five ones on one screen and the latter five ones on the other. You can switch among them by pressing .

Gate Menu

The most outstanding feature of the digital flaw detector is the ability to display all the analogue values of echoes on the screen by digital signals. When the instrument is required to compare and compute a signal wave, “human” is needed to tell it which echo to trace. Gate is appointed for locking the echo to be measured. The instrument handles and computes the echo inside the gate as well as displays all the data of the highest echo (including data of the sound path, the horizontal distance, the vertical distance, and the height).

The instrument works in a dual-gate mode with Gate A and Gate B. The reading mode of the gate is single gate one. The user can choose Gate A as the current gate.

Press  to activate the gate menu. Press it for odd times to select Gate A, even times to select Gate B.

Gate A Menu

Starting of Gate A

Press   for odd times to select the Gate A menu, then press (up) or   (down) to select the starting of Gate A submenu. Then press  (left) or (right) to adjust the values.

When you adjust the values, you can press Ok to adjust the steps which are divided into 1, 5, and 10.

Width of Gate A

Select Gate A menu, press  (up) or   (down) to select the width of Gate A sub-menu, then press   (left) or   (right) to adjust the values.

Minimum adjustment range is 2 mm, while the maximum one is same as the sound path value.

When you adjust the values, you can press Ok to adjust the steps which are divided into 1, 5, and 10.

Height of Gate A

Select Gate A menu, press  (up) or  (down) to select the height of Gate A submenu, then press  (left) or   (right) to adjust the values.

When you adjust the values, you can press Ok to adjust the steps which are divided into 0.5, 2.5, and 5.

Mode of Gate A

Select Gate A menu, press  (up) or  (down) to select the mode of Gate A submenu, then press  (left) or   (right) to adjust the values.

Off – Turning off the gate, ie, turning off the  alarming and measurement functions.

Positive Afferent Echo Alarm – In the coverage of Gate A, if the echo exceeds the preset gate height, and the alarm is “on”, the alarm will sound.

Negative Echo Loss Alarm – In the coverage of Gate A, if the echo is lower than the preset gate height, and the alarm is “on”, the alarm will sound.

Display Choice

Select Gate A menu, press  (up) or  (down) to select the display choice submenu, then press  (left) or   (right) to adjust the values.

Gate B Menu

Starting of Gate B

Press  for even times to select the Gate B menu, then press  (up) or   (down) to select the starting of Gate B submenu. Then press  (left) or  (right) to adjust the values.

When you adjust the values, you can press Ok to adjust the steps which are divided into 1, 5, and 10.

Width of Gate B

Select Gate B menu, press  (up) or  (down) to select the width of Gate B submenu, then press  (left) or   (right) to adjust the values.

When you adjust the values, you can press Ok to adjust the steps which are divided into 1, 5, and 10.

Height of Gate B

Select Gate B menu, press  (up) or  (down) to select the height of Gate B submenu, then press  (left) or   (right) to adjust the values.

Mode of Gate B

Select Gate B menu, press  (up) or  (down) to select the mode of Gate B submenu, then press  (left) or   (right) to adjust the values.

Off – Turning off the gate, ie, turning off the alarming and measurement functions.

Positive Afferent Echo Alarm – In the coverage of Gate B, if the echo exceeds the preset gate height, and the alarm is “on”, the alarm will sound.

Negative Echo Loss Alarm – In the coverage of Gate B, if the echo is lower than the preset gate height, and the alarm is “on”, the alarm will sound.

Measuring Point

You can use this function to set the measuring point position of the gate.

Select the Gate B menu, press  (up) or  (down) to select the measuring point submenu. Then press   (left) or   (right) to choose the values.

The peak mode refers to the highest information of the echo in the gate, and the front mode refers to the first information when the echo goes through the gate.

Probe Menu

Press   to select the probe menu.

Dual Probes

You can use this function to set the probe types.

Select the probe menu, press  (up) or  (down) to select the dual probes submenu. Then press  (left) or   (right) to adjust the values.

Probe Zero

There is a certain sound path distance between the probe chip and the coupling surface of the work piece to be detected, thus there will be a sonic time delay. The delay effect can be compensated by setting the probe zero submenu.

Select the probe menu, press  (up) or  (down) to select the probe zero submenu. Then press  (left) or  (right) to adjust the values.

Probe K Value

When the angle beam probe is used, the included angle value (β) between the sound beam in the work piece of the incidence of the sound wave and the surface normal should be set as: K value – k=tgβ.

Select the probe menu, press    (up) or  (down) to select the probe K value submenu. Then press  (left) or  (right) to select the probe K value and the probe angle. Press  (up) or  (down) to select the value option, then press  (left) or  (right) to adjust the value.

Front Distance

In the menu, you can set the front edge length value of the probe (referring the distance between the front edge of the angle beam probe to the point of incidence of the probe).

Select the probe menu, press   (up) or  (down) to select the front distance submenu. Then press   (left) or  (right) to adjust the values.

Work Piece Thickness

On the work piece thickness submenu, you can set the work piece thickness in the vertical direction of the detection plane. When using angle beam probe, the positioning of the vertical depth of the flaws need this value set. The reason is that when non-primary reflection is used in the detection, if the work piece thickness is not considered, it will result that the instrument might produce an outcome that the vertical depth value is larger than the actual thickness of the work piece when it automatically measure the vertical depth.

Select the probe menu, press  (up) or    (down) to select the work piece submenu. Then press  (left) or   (right) to adjust the value.

Curve menu

Owing to the diffusion and attenuation of the sound velocity, the echo heights of the reflectors of the same size depend on the distance between the reflector and the probe. The distance amplitude curve is made according to different reference reflectors which are the same size but different in their depths, and a curve diagram mode displays the influences and the changes. When the DAC curve is being made, the material of the reference block with artificial flaws should be same as the work piece to be tested.

DAC echo

Select the DAC menu, press  (up) or  (down) to select the DAC echo sub-menu. Then press  (left) or (right) to adjust the value.

Gate A start

Select the DAC menu, press  (up) or  (down) to select the Gate A start sub-menu. Then press  (left) or  (right) to adjust the value.

RL

Press for twice to select the DAC menu, press  (up) or  (down) to select the RL Sub-menu. Then press  (left) or  (right) to adjust the values.

SL

Select the DAC menu, press   (up) or    (down) to select the SL sub-menu. Then press  (left) or  (right) to adjust the values.

EL

Select the DAC menu, press   (up) or    (down) to select the the EL submenu. Then press   (left) or  (right) to adjust the values.

Memory Menu

Press    to enter the memory menu.

Memory Number

Select the memory menu, press   (up) or    (down) to select the memory number Sub-menu. Then press   (left) or  (right) to adjust the values.

Call-out

After the data set is called out, the instrument parameters will be set same as those which are stored, and they will be displayed in freeze mode of the waveform stored.

First, set the memory number as the one you need, then select the option of call-out, press (left) or  (right). When it comes to confirm calling out the file on the screen, press Ok to confirm and press any other key to cancel.

Storage

You can store the current parameter setting of the instrument, DAC curve and the waveforms into the data set of an appointed memory number.

First, set the memory number as the number you want, then select the option of storage, press  (left) or  (right). When it comes to confirming storing the file on the screen, press Ok to confirm and press any other key to cancel.

Deletion

First set the memory number, then select this option, press Ok to confirm, any other key to cancel. If there is a  before the memory number, that means the data set is occupied. You can delete the set.

Communication

The flaw detector can exchange data with PC.