NDT Systems Avenger II User manual

Version 1.0, 11/6/20
User Manual

AVENGER II User Manual
1 | Page NDT Systems, Inc. 5542 Buckingham Drive, Huntington Beach, CA 92649, PH: 714-893-2438
Table of Contents Page Number
1. INTRODUCTION 2
2. PRINCIPAL OF OPERATION 3
3. DEVICE REFERENCE 4
4. OPERATIONAL MENU DETAILS 7
5. DATA TRANSFER 25
6. TIME/DATE, FACTORY RESET 26
7. POWER SUPPLY 27
8. SPECIFICATIONS 28
9. WARRANTY 30
APPENDIX I 30

AVENGER II User Manual
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1. Introduction
The AVENGER II is an ultralight palmtop ultrasonic flaw detector. Weighing in at only 800grams,
the ambidextrous operation modes make one handed inspection easy. The portability and
compact housing make the Avenger II unique in its class. The AVENGER II is equipped with a 5
inch color WVGA LCD/TFT display with wide viewing angles. A 7.2 VDC, 4AH lithium ion battery
gives over eight hours of continuous operation on a single charge. 500 trace patterns and 50
setups can be easily stored and recalled. A micro SD Card up to 32GB and a USB communication
port make data transfer to the computer easy.

AVENGER II User Manual
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2. Principal of Operation
The AVENGER II is a single channel Ultrasonic Flaw Detector used for the
inspection of homogeneous material for the presence of inclusions, porosity,
and other discontinuities. It can also be used for thickness gauging of
homogeneous material, requiring access from only one side of the test piece.
High frequency sound (Ultrasonic sound) waves are introduced into the test
material/part from a transducer/probe that is coupled to the test piece,
usually by water or other suitable coupling liquid. The transducer converts
electric signals to Ultrasound and vice versa. A short burst of Ultrasound is
introduced into test material. The reflection of the ultrasound energy is a function of the ratio between
the acoustic impedance of the discontinuity and the base material. The greater the impedance ratio, the
more sound energy will be reflected. The principle of Ultrasonic testing is shown in fig. 1. It shows the
ultrasonic energy generated in the test piece and resultant instrument display.
Thickness gauging with the AVENGER II operates on the principle of the time-of-flight measurement.
This principle utilizes the precise timing of the transit time of a short burst of ultrasound energy, through
a material under test. The ultrasound waves travel to the far side of the test piece and return to the
transducer/probe. The round-trip time is recorded and multiplied by a material velocity to produce a
thickness measurement.
Three types of transducers are available for different applications:
Straight beam Probe: This probe introduces ultrasound normal to the test piece
surface utilizing longitudinal or compression waves. Normal beam probes are
used mostly for flaw detection and thickness gauging (figure 1.)
TR probe: This probe contains a transmitter and receiver element (figure 2). This
design improves near surface resolution by setting the initial pulse from the
received echoes. TR probes produce better near surface resolution, especially
useful on pitted and corroded surfaces.
Angle Beam Probe: This probe introduces ultrasound at an angle to the surface
of the test piece (figure 3). The wave energy is mode converted from a
longitudinal wave to a shear wave by the refraction principle. Angle beam
probes are useful for weld inspections and detection of flaws perpendicular to
the test surface. The reason for this is its ability to position the transducer/probe
away from the weld bead yet propagate energy into the weld zone. Another
reason to use angle beam testing on the welds is to position the sound beam
more normal to the expected discontinuities.

AVENGER II User Manual
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3. Device Reference

AVENGER II User Manual
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1. POWER key : Turn power ON and OFF using this key.
2. MENU INC key: Increases MENU value.
3. MENU DEC key: Decreases MENU value.
4. DN key: Navigation Down inside the particular MENU from one setting to another.
5. UP key: Navigate UP inside the particular MENU from one setting to another.
6. LEFT key: Navigate Left inside the current setting or activate the prompted action.
7. RIGHT key: Navigate Right inside the current setting or activate the prompted action.
8. GAIN DN key: Decreases the gain.
9. GAIN UP key: Increases the gain.
10. LED INDICATOR: Green when device is charging, Red when display is on.
11. LCD SCREEN: Displays the A-Scan trace patterns, menu settings and other details.
12. USB DSK Indicator: This symbol is visible when a USB DRIVE is connected to AVENGER II or when
the AVENGER II is connected to a PC.
13. SD card Indicator: This symbol is visible when a SD card is inserted to AVENGER II.
14. REJECTION: This symbol is indicated when Rejection is ON.
15. MODE Selection: This symbol indicates whether the probe mode is Dual Crystal OR Single
Crystal.
16. GATES: GATES are displayed when “Gate a” (red) and “Gate b” (yellow) are ON.
17. MEASURE Details: When MEASURE is on, details like sound path, depth path, surface distance
and amplitude percent are displayed at bottom of screen.
18. BATTERY Indicator: Indicates battery level.
19. TIME AND DATE: Indicates present date and time.
20. MENU Nos.: Indicates the current menu number.
21. FREEZ: Current screen FREEZES by pressing CENTER key twice.
22. CHARGER CONNECTOR: Connect the charger here to charge the battery.
23. RX CONNECTOR: Receiver connection for Dual Crystal transducers.
24. TX CONNECTOR: Transmit/Receive connection for Single and Dual Crystal transducers.

AVENGER II User Manual
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25. BATTERY COMPARTMENT: Battery is fitted in this compartment.
26. USB SLOT: USB slot for attaching USB drives and DSK.
27. SD CARD SLOT: SD card slot for external storage and data transfer.
28. I/O PORT: Encoder interface and Alarm signal.
29. PIN FOR HOLDING STRAP: Two Pins are provided for hand and neck straps.
30. STAND: Support Stand is provided for loading of AVENGER II on a surface.
31. CENTER KEY: Enter selected value, hold while incrementing a value to rapidly increment.
STATUS INDICATORS
SD Card mounted
USB Disk mounted
Probe mode Dual Crystal selected
Probe mode Single Crystal selected
Measurement reading is Flank trigger selected
Measurement reading is Peak trigger selected
Rejection applied
TCG active

AVENGER II User Manual
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4. Operational Menu Details
The AVENGER II is a user friendly, menu driven Ultrasonic Flaw Detector. Details of all menus and settings
are below.
Menu 1 – Basic functions of an Ultrasonic Flaw Detector (UFD) Range, Material
Velocity, Delay and Gain functions are covered.
ZERO: Adjust artificial zero of the transducer.
RANGE: Adjust test range. Set in terms of Millimeters or Inches. The range available
for steel is from 2.50 to 10000 mm (0.100 to 400 inch). Rapidly increment by pressing
CENTER key along with the LEFT/RIGHT key.
VELOCITY: Adjust material velocity. Set in terms of m/s or in/s.
DELAY : Partial Range can be set in DELAY using the LEFT/RIGHT keys. Exact
shift/delay in mm (Inch) is displayed at the bottom.
GAIN STEP: Gain step value can be set by using GAIN UP/DN key. Increments of
0.1,0.5, 1, 2, 6, or 14 dB.
GAIN: Gain can be increased/decreased as per value of step by using GAIN UP/DN
keys.
Example: AVENGER II is to be calibrated for 100 mm Test Range using a Single Element probe.
•Using UP/DN keys navigate to RANGE in MENU 1.
•Using LEFT/RIGHT keys set required range to 100mm.
•Couple the probe on 25mm thickness of V1 reference block, Navigate to ZERO in MENU 1 using
UP/DN keys and set first echo at 25mm using LEFT/RIGHT keys.
•Set 4th echo at 100 mm by changing velocity using LEFT/RIGHT keys in MTL VEL, if required.
•Repeat above two steps until both the echoes are at their respective positions.
•Amplitudes of the echoes can be varied using GAIN keys.
ZERO
2200
RANGE
100 MM
MTL VEL
5920M/S
DELAY
0.00MM
GAIN 1
25.0 dB

AVENGER II User Manual
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Menu 2 – MONITOR “GATE a” functions.
GATE a : Gate can be changed to PLOGIC, NLOGIC, CRV M, CRV-1, CRV-2, CRV+1,
CRV+2, EXPAND or OFF
PLOGIC: When PLOGIC is selected, the MONITOR triggers if an echo is present
within the gate and its height is equal to or crosses the set Threshold Level.
NLOGIC: When NLOGIC is selected, the MONITOR triggers if there is no echo
within the gate or the height is lower than the Threshold Level.
CRV M : When DAC is turned ON and CRV M is selected the monitor triggers
if any Echo signal equals or crosses main DAC Curve
CRV-1: If DAC is turned ON and if any echo signal cross DAC-1 dB curve then
the monitor triggers.
CRV-2: If DAC is turned ON and if any echo signal cross DAC-2 dB curve then
the monitor triggers.
CRV+1: If DAC is turned ON and if any echo signal cross DAC+1 dB curve then the monitor
triggers.
CRV+2: If DAC is turned ON and if any echo signal cross DAC+2 dB curve then the monitor
triggers.
EXPAND: When EXPAND is selected the scale expansion activates and GATEa width expands to Full-
screen width for a magnified view.
STARTa: GATEa starting position can be set using START. By pressing LEFT/RIGHT Keys Gate start can
be set in term of mm or in.
WIDTHa: Gate width can be set using WIDTH, set in terms of mm or in.
LEVELa: Gate Threshold Level, set in terms of the percentage of the Full Screen Height (FSH).
Example: The MONITOR to be triggered when any echo crosses the 50% FSH between 35mm
and 80mm.
•In the Gate setting MENU 2, select PLOGIC using LEFT/RIGHT keys.
•Set Gate START to 35mm using LEFT/RIGHT keys.
•Set Gate END to 80mm using LEFT/RIGHT keys in WIDTH.
•Set Gate LEVEL to 50% using LEFT/RIGHT keys.
GATEa
OFF
STARTa
30.0 mm
WIDTHa
40.0MM
LEVELa
30 %
GAIN 1
25.0 dB

AVENGER II User Manual
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Menu 3 –MONITOR “GATE b” functions.
GATEb : Gate can be changed to PLOGIC, NLOGIC or OFF
PLOGIC: When PLOGIC is selected, the MONITOR triggers if an echo is
present within the gate and its height is equal to or crosses the set
Threshold Level.
NLOGIC: When NLOGIC is selected, the MONITOR triggers if there is no echo
within the gate or the height is lower than the Threshold Level.
STARTb: GATEb starting position can be set using START. By pressing LEFT/RIGHT
Keys Gate start can be set in term of mm or in.
WIDTHb : Gate width can be set using WIDTH, set in terms of mm or in.
LEVELb: Gate Threshold Level, set in terms of the percentage of the Full Screen
Height (FSH).
GATEb
OFF
STARTb
30.0 mm
WIDTHb
40.0MM
LEVELb
30 %
GAIN 1
25.0 dB

AVENGER II User Manual
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Menu 4 – Memory storage/recall and Trace printout functions.
MEMORY : Select A SCAN or SET-UP memory functions.
MEM NO : Select desired memory location from MEM NO. If Data is stored and
valid, an asterisk (“*”) will be displayed next to “MEM NO”.
ACTION : Required functions like SAVE, DETAIL,DELETE,COPY ALL, RECALL can be
selected using LEFT/RIGHT Keys. When DETAIL is selected, Note Data of
stored A Scan is displayed.
ENTER : In NOTE ENTER by pressing RIGHT key, the selected ACTION is performed.
Pressing the LEFT key brings up the Note menu. Edit/change Note detail if required,
press RIGHT key to exit Note edit.
Example: To SAVE current Calibration and A scan in Memory no 3.
•Acquire desired signal on the screen. Press CENTER key twice to freeze the
screen.
•Select A SCAN in Memory using LEFT/RIGHT keys.
•Set MEM NO to 3 using LEFT/RIGHT keys.
•Set ACTION to SAVE using LEFT/RIGHT keys.
•In NOTE/ENTER press LEFT key so Note menu will be displayed. Edit if required and exit from
note menu.
( To edit in side text menu- Using UP/DN keys navigate to LINE UP/DN then by using LEFT/RIGHT
key select the line for entering text, and then navigate to CURSOR MOVE and by using LEFT/RIGHT
key and GAIN UP DN or MENU INC/DEC (CHAR SCROLL) keys to edit the text content, also to delete
a character press MENU INC key along with the CENTER key, and to add a space press MENU DEC
key along with the CENTER key.)
•Press RIGHT key in NOTE/ENTER to exit from side text menu. By pressing RIGHT key again in
NOTE/ENTER, the current calibration, A-Scan, and Note data will be stored in MEM NO. 3.
Note: If data is already stored at this location, press CENTER KEY and RIGHT key to over write the data.
MEMORY
A SCAN
MEM NO*
001
ACTION
RECALL
<NOTE
ENTER>
GAIN 1
25.0 dB

AVENGER II User Manual
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Menu 5 –DGS, DAC curve, and AWS measurement mode functions. Navigate to Menu
11 to select measurement mode
DAC: DAC setting can be switched to DRAW, ON, OFF, TCG ON or TCG EDIT using
LEFT/RIGHT keys.
OFF: DAC curve will be not displayed on LCD.
DRAW: Peak points of echo signals are selected and stored.
ON: The selected peak points are digitally connected to form a DAC curve.
TCG ON: Time Gain Correction activated as per DAC so it brings echo signal to
same height irrespective of depth
TCG EDIT : In this mode user can adjust gain/echo amplitude of the recorded
echo signal.
STRT a: Start of the GATE can be set in STRTa using LEFT/RIGHT keys. To select any
peak of the echo signal, move the Gate on the echo signal and then press LEFT/RIGHT
Key in the ENTER menu cell. POINT value is automatically incremented to indicate next point.
(If GATE 1 is OFF then turn to PLOGIC).
POINT/TL: Select number of points in DAC OFF or DRAW, change the levels in DAC ON, TCG ON/EDIT
POINT: Cell will change to DAC dB to draw additional offset DAC curve when DAC is ON.
TL : Cell will change to “T-L” when DAC is ON Gain of machine can be change without
affecting curve height. It can be used for Transfer/Scanning gain correction.
DAC
OFF
STRT a
030%
PRESS
ENTER
POINT
ENTER
GAIN 1
25.0 dB

AVENGER II User Manual
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DAC REF Gain
In the DAC Draw process when user registers first echo signal, the equipment will automatically bring
the registered echo signal to 80% height and Gain (Gain required to bring registered echo to 80%) is
stored as REF Gain.
Example: To digitally draw DAC curve to join four peaks of the echo signals using 25mm thick
reference block and range of 100mm.
•Set Gain so that all four peaks are visible on the LCD screen above 50% FSH.
•Set DAC to DRAW using LEFT/RIGHT keys in DAC in MENU 5.
•Move cursor using LEFT/RIGHT keys in START a to cover the first echo. If GATE 1 is OFF then
switch to PLOGIC.
•Press LEFT/RIGHT key in ENTER to accept it and Point No. will be incremented automatically.
•Repeat above two steps for second, third and forth echo.
•Set DAC to ON using LEFT/RIGHT key in DAC. Now DAC Curve will be displayed on LCD.
Example: To Edit echo amplitude of the recorded echo signal in TCG
•In the DAC menu after drawing DAC curve select “TCG EDIT”
•Select “POINT” using LEFT/RIGHT key
•Select appropriate Point number using LEFT/RIGHT key so Gate will be drawn to indicate
selected echo signal.
•Select “DAC dB” using UP/DN key.
•Adjust echo height by pressing LEFT/RIGHT key.
Note: Cursor need not touch the echo for selection and acceptance of the peak point.

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AWS: AWS setting can be switched to SET, MEASURE or OFF using LEFT/RIGHT keys.
SET mode: Set GATE 1 to PLOGIC then bring reference echo of reflector in between
40 to 60% , Turn SET REF to ON key so gain of reference echo is recorded and
displayed as REF GAIN. (RG)
MEASURE : Display “IL” (Indication level) dB value to bring echo to reference level.
AF: Display attenuation factor to correct for the depth of the echo signal.
IR: Display indication rating as per AWS code. IR=IL-RG-AF.
Example: Set up an AWS compliant measurement
•Select MEASURE POSITION, MEAPOS1 and MEAPOS2 to ON.
•Set GATEa to “PLOGIC”
•Couple probe on reference defect and set gain value so echo height
within 40 to 60% of Screen.
•Set GATEa in such a way so echo signal within GATE.
•Then turn SET REF to ON so required gain to bring echo to 50% is recorded and displayed as
a REF Gain in GAIN box.
•Set AWS to MEASURE to display Indicated Rating as per AWS code.
Indication rating is based below formula.
IR=IL-RG-AF
Where,
IL : Indicating Level… Gain value to bring echo height to reference level (50%).
RG : Reference Gain.. Gain value to bring reference echo height to reference level(50%)
AF : Attenuation Factor… Attenuation of signal in material as per AWS standard.
Based on below formula.
AF= (Sound path (in Inch) -1) * 2
IR : Indicated Rating… Different dB between the indication signal and reference signal with
attenuation correction.
AWS
OFF
START a
30.0mm
SET-REF
OFF
GAIN 1
25.0 dB

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DGS: DGS setting can be switched to SELECT, REF REC,ON or OFF using LEFT/RIGHT
keys. In SELECT mode probe type, reference diameter, reference type, required DGS
curve diameter, etc. can be selected. In ON mode DGS curve will be displayed on
Screen as per what is selected in DGS selection menu.
STRT a : To select echo peak as reference move GATE a using STRT a. If GATE a is OFF
then select to PLOGIC in Menu 2.
SET-REF: When switched to ON, the reference echo within the gate is registered and
the height of the reference echo is brought to ref. curve height. When DGS is turned to
ON then SET-Ref will automatically switched OFF.
TL-CORR: This correction is required if test object and reference block have different
surface qualities. By varying TL-CORR gain will change but DGS curve height remains
same.
DGS Selection Menu : When DGS is
turned to “SELECT”, the DGS
selection menu will be displayed on
Screen. Use MENU INC/DEC keys &
UP/D Keys to navigate inside the DGS
SELECT MENU.
Selected setting in the DGS SELECT
MENU will be Highlighted.
DGS
OFF
START a
30.0mm
DGS-REF
OFF
TL-CORR
00.0dB
GAIN 1
25.0 dB
DGS
SELECT
SCAL NO
002
D EFFT
23.1 MM EXIT
STRT a
30.0mm
PROBE
M2SN
DGS-CRV
11.0 MM
ATT-REF
00.0 dB
DGS-REF
OFF
FREQ
2.00MHZ
REFECHO
FBH
ATT-OBJ
00.0 dB
TL-CORR
00.0 dB
DEL-VEL
2500M/S
REFSIZE
11.0 MM
AMPCOR
00.0 dB
GAIN 1
25.0 dB

AVENGER II User Manual
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SCAL NO : Scrolls from 0 to 18. Select “0” for a custom probe which is not listed. For custom probe
select appropriate probe frequency and probe effective dia.
PROBE : Displays model name of predefined probe.
PRBFREQ : Displays probe frequency of predefined probe. For custom probe select
appropriate probe frequency.
DEL-VEL : Displays the ultrasonic velocity of probe delay line. It is fixed for predefined probes.
D-EFFT : Displays effective diameter of probe crystals. It is fixed for predefined probe. Select
appropriate value for Custom probe.
DGS-CRV : Select appropriate value for which diameter DGS curve is required.
REF-ECHO : Select reference type FBH, BW, or SDH.
REF SIZE : Select appropriate value as per reference reflector size.
ATT-REF : Select Ultrasound Attenuation factor of reference object. (dB/meter).
ATT-OBJ : Select Ultrasound Attenuation factor of test object. (dB/meter).
AMPLCOR : Gain correction. Use with angle probe where reference echo is taken from 100 mm or 25
mm arc of V1/V2 reference block.
Example: To plot DGS for 11 mm size equivalent reflector for M2SN probe.
•Switch GATE a to PLOGIC. (NLOGIC will also work)
•Select DGS in menu 11 under EVALMOD. It will not turn to DGS if DAC is ON.
•Go to DGS menu 6.
•Couple probe on 25mm thick V1 block and calibrate for required range.
•Bring first echo within screen with height between 40 to 80 % FSH preferable.
•Set first back-wall echo signal within GATE a using START a.
•Change DGS to “SELECT” by pressing LEFT/RIGHT keys.
•Navigate to SCAL NO & Select SCAL NO to 2 by pressing corresponding UP/DN keys.
•Navigate to DGS-CRV and Select DGS-CRV to 11.0 mm by pressing corresponding
UP/DN keys.
•Select REFECHO to BW by pressing corresponding UP/DN keys.
•ATT-REF and ATT-OBJ to be set as per appropriate value. Here it is set to 0.
•Navigate to EXIT and Press LEFT/RIGHT keys.
•Select DGS-REF to ON, reference echo height is registered and brought to reference
curve. (make sure reference echo is within GATE 1 with 40 to 80% FSH preferable).
•Now navigate to DGS REF REC and Press LEFT/RIGHT key so it turns to ON and
appropriate DGS curve will be displayed.

AVENGER II User Manual
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Menu 6– Damping, Crystal Type, PRF
DAMPING: Probe Damping HIGH/LOW can be selected using LEFT/RIGHT keys in
DAMPING.
MODE: Test Mode for the use of SINGLE or DUAL Crystal probes can be selected using
LEFT/RIGHT keys in MODE.
PRF: Using LEFT/RIGHT keys PRF can be selected from High, Low and Medium. Low
PRF value is useful when ghost echo pattern appears when testing materials with low
attenuation.
DAMPING
LOW
MODE
SINGLE
PRF MOD
HIGH
GAIN 1
25.0 dB

AVENGER II User Manual
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Menu 7– Thickness/Distance measurement functions.
REJECT: Rejection level can be set as per requirement. Set in terms of percentage of
FSH. Activation of this function is indicated by R Symbol (14).
SMOOTH : Smoothness of the echo can be set to LOW, MEDIUM, HIGH OR OFF using
LEFT/RIGHT keys.
VIDEO: Echo signals can be selected to appear as a line (ENVELOP) or solid (FILLED)
using LEFT/RIGHT key in VIDEO. In ENVELOP mode, echo signals appear same as in
Analog Ultrasonic Flaw Detector. In FILLED mode, echo signals look solid for better
visibility.
SET REF: To set any A-scan pattern as a reference, acquire desired pattern on the
screen, then adjust SET REF to ON. The reference pattern will persist for easy
comparison. An A-scan pattern from memory can be recalled and set as a reference.
REJECT
00%
SMOOTH
OFF
VIDEO
ENVELOP
SET REF
OFF
GAIN 1
25.0 dB

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Menu 8- Thickness/Distance measurement functions continued.
UNIT: Unit of measurement, mm or inch.
COLOR: LCD Color combination can be selected using LEFT/RIGHT keys in COLOR.
BRIGHT: Brightness of LCD can be adjusted for better visibility using LEFT/RIGHT
keys in BRIGHT. Set Low brightness when used for indoor application for the longer
battery life.
DISPLAY: Enables rotation of the display for right or left-handed use.
UNIT
MM
COLOR
05
BRIGHT
50%
DISPLAY
RIGHT
GAIN 1
25.0 dB

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Menu 9 – Shearwave Analysis Functions.
X-OFF: Set X-OFF value to the front face distance for a correct surface distance
reading.
ANGLE: Corresponds to the angle of wedge being used. When measure is set to ON,
appropriate Surface and Depth of defect is calculated and displayed on the screen.
THICK: Thickness value should be set as per the thickness of the test piece, enables
calculation of depth/distance accounting for multiple skips.
TRIGGER: Select measurement point trigger by the echo pulse FLANK or PEAK.
COLOR LEG
The color leg display makes it easy to interpret the location of a defect when an angle
probe is used for the testing.
To display the Color Leg indication on the screen, follow the below steps:
•Go to Menu 8 and select “COLOR” meter.
•Decrement the COLOR value until “COLOR LEG” displays on the screen by pressing DN key.
•To toggle between COLOR LEG ON/OFF by pressing DN key along with
Example: To measure Beam path, Surface, and Depth distance when 45 deg. probe is used.
•Go to GATE a in MENU 2 and make Gate to PLOGIC/NLOGIC.
•Set Gate STARTa and Gate WIDTHa value in such a way so defect signal within the GATE.
•Set Gain or Threshold so height of the echo/defect beyond the GATEa.
•Go to measure menu and MENU11 set MEAPOS1 to “ON G A”.
•Set angle value to 45 DEG in MENU9. Using LEFT/RIGHT keys in angle.
•Set appropriate THICK value in MENU9 so it can account multiple skips for DEPTH distance
calculations.
•Sound path, Depth, and Surface distance will be displayed on the bottom of the screen.
X-OFF
0.00mm
ANGLE
0.0 DEG
THICK
100 mm
TRIGGER
FLANK
GAIN 1
25.0 dB