1. EPOCH 1000i Feature Overview Encoded and Timed C-scan

2. Presentation Contents
Feature Overview
Creating an Encoded C-scan from a Sectorial Scan
Creating an Encoded C-scan from a Linear Scan
Creating a Timed C-scan from a Linear Scan
Reviewing Acquired C-scan Data

3. Presentation Contents– Demonstration Procedures
Attaching the Mini-Wheel Encoder
Encoder Calibration
Tips for Weld Inspection
Demonstration Procedure: Zero Degree Flaw Inspection

4. Feature Overview

5. Option Overview
The encoded C-Scan software option is an added cost option to the standard EPOCH 1000i instrument.
It is the same part number and price as the previously released manual Linear scan and C-scan software.
P/N EP1000I-ECSCAN (U )
When this software option is purchased it can be remotely activated on the EPOCH 1000i via a software code provided.
This option adds:
Encoded and timed C-Scan
Linear scan capability (L-scan or E-scan for electronic scan)
Increases the phased array configuration from the standard 16:16 to 16:64.

6. Option Overview
The Encoded C-scan option allows you to create phased array C-scans from both linear and sector scan data.
This is an added feature from the previous option which only allowed C-scan creation from linear scans.
C-scan creation from S-scans makes this software option especially helpful in weld inspection as you can view gated data over a sweep of angles at multiple probe positions.

7. Required Equipment Encoded C-Scan Software Option Mini-Wheel Encoder
Other encoders can also be used
Encoder Adaptor Cable
5L16-A10P or 5L64-A12 Probe (or equivalent)
Any phased array probe that attaches to an encoder and has 16 elements for S-Scans and up to 64 elements for Linear Scans can be used
Encoder Compatible Wedges
Special phased array wedges are required for use with encoded scans with the A10, A10P and A12 style probes. These wedges have threaded inserts for connecting to encoders.

8. Creating an Encoded C-scan from a Sectorial Scan (S-scan)

9. Creating a C-scan from an S-scan
To create a C-scan from a sector scan, begin with a fully calibrated S-scan
Completed Zero and Gain calibrations

10. Depth Gates
Gates can be displayed in True Depth mode on the S-scan allowing you to collect C-scan measurements from a constant depth area in the part.
To set up True Depth gates:
Select Gate Setup > Setup
Set Gates Type to Depth
Gate type is a global setting that is applied to all active gates
Gates will only display as horizontal lines on the S-scan only, A-scan gates will remain in soundpath mode

11. Depth Gates (cont.)
Adjust the G1Start and G1Width parameters to capture the desired depth within the test piece
Leg Indicators can be useful when collecting data for an entire skip distance at once
NOTE: Make sure that the gate is still capturing data at higher focal laws or you will not have a complete C-scan. If not, increase your range!

12. Attaching the Encoder
For encoded C-scans, a positional encoder is used to track distance traveled along the scan axis.
Encoder-compatible wedges and an EPOCH 1000i adaptor cable are required for proper setup.
For detailed information on setting up the mini-wheel encoder, please use the following link:
Attaching the Mini-Wheel Encoder

13. Calibrating the Encoder
Once the encoder has been attached to the probe, it must be calibrated to ensure proper distance values are collected during the scan.
For instructions on how to calibrate the encoder, please use the following link:
Encoder Calibration

14. C-scan Setup
Now you are ready to set up your C-scan using the following steps:
Turn ON the option in the C Scan > C Scan menu.
Once the C-scan is turned on, additional C-scan parameters will display in the menu.

15. C-scan Setup (cont.)
Select C Scan > Setup to enter the setup screen
Choose an Encoder Mode (Uni or Bi-directional)
Select a Scan Direction (will determine the display view of the A-scan and C-scan image)
Set your Scan Resolution for your C-scan. This parameter will determine maximum scanning speed.
Encoder Resolution will automatically populate from the encoder calibration

16. C-scan Setup (cont.)
Set the desired Start and End Co-ordinates for the scan
Select whether to Save Ascan images
If Gate 2 is being used, select the Amplitude Decimation factor
For encoded C-scans, gate 1 amplitude compression is automatically set to maximum and depth compression for gates 1 and 2 is set to minimum.
The current Scan File Size based on the selected parameters is displayed. This parameter cannot exceed the Max File Size of approximately 70Mb.
Press the [ESCAPE] key to return to the live screen.

17. Creating a C-scan To acquire data for your C-scan
Set the C Scan > Mode to Start
Move your encoder and probe along your test piece at the appropriate scan rate so that you do not receive an LOS measurement

18. Additional Notes
Encoded C-scans can also be created from a zero degree sector scan
These types of encoded C-scans can be very helpful in weld inspection applications. For additional information, refer to our Tips for Weld Inspection.

19. Return to Presentation Contents Reviewing Acquired C-Scan Data

20. Creating an Encoded C-scan from a Linear Scan (L-scan)

21. Creating a C-scan from a Linear Scan
To create a C-scan from a linear scan, begin with a fully calibrated linear scan
Completed Zero and Gain calibrations

22. Gate Adjustment For zero degree C-scans, Soundpath gates can be used
You should set your gate position so that you are capturing the desired distance within the part for your C-scan.
Adjust the G1Start and G1Width parameters to capture the desired distance within the test piece
A second gate can also be helpful for backwall monitoring
Adjust the G2Start and G2Width parameters to surround the backwall echo

23. Attaching the Encoder
For encoded C-scans, a positional encoder is used to track distance traveled along the scan axis.
Encoder-compatible wedges and an EPOCH 1000i adaptor cable are required for proper setup.
For detailed information on setting up the mini-wheel encoder, please use the following link:
Attaching the Mini-Wheel Encoder

24. Calibrating the Encoder
Once the encoder has been attached to the probe, it must be calibrated to ensure proper distance values are collected during the scan.
For instructions on how to calibrate the encoder, please use the following link:
Encoder Calibration

25. C-scan Setup
Now you are ready to set up your C-scan using the following steps:
Turn ON the option in the C Scan > C Scan menu.
Once the C-scan is turned on, additional C-scan parameters will display in the menu.

26. C-scan Setup (cont.)
Select C Scan > Setup to enter the setup screen
Choose an Encoder Mode (Uni or Bi-directional)
Select a Scan Direction (will determine the display view of the A-scan and C-scan image)
Set your Scan Resolution for your C-scan. This parameter will determine maximum scanning speed.
Encoder Resolution will automatically populate from the encoder calibration

27. C-scan Setup (cont.)
Set the desired Start and End Co-ordinates for the scan
Select whether to Save Ascan images
If Gate 2 is being used, select the Amplitude Decimation factor
For encoded C-scans, gate 1 amplitude compression is automatically set to maximum and depth compression for gates 1 and 2 is set to minimum.
The current Scan File Size based on the selected parameters is displayed. This parameter cannot exceed the Max File Size of approximately 70Mb.
Press the [ESCAPE] key to return to the live screen.

28. Creating a C-scan To acquire data for your C-scan
Set the C Scan > Mode to Start
Move your encoder and probe along your test piece at the appropriate scan rate so that you do not receive an LOS measurement

29. Return to Presentation Contents Reviewing Acquired C-Scan Data
Demonstration Procedure: Zero Degree Flaw Inspection

30. Creating a Timed C-scan from a Linear Scan (L-scan)

31. Creating a C-scan from a Linear Scan
To create a C-scan from a linear scan, begin with a fully calibrated linear scan
Completed Zero and Gain calibrations

32. Gate Adjustment For zero degree C-scans, Soundpath gates can be used
You should set your gate position so that you are capturing the desired distance within the part for your C-scan.
Adjust the G1Start and G1Width parameters to capture the desired distance within the test piece
A second gate can also be helpful for backwall monitoring
Adjust the G2Start and G2Width parameters to surround the backwall echo

33. C-scan Setup
Now you are ready to set up your C-scan using the following steps:
Turn ON the option in the C Scan > C Scan menu.
Once the C-scan is turned on, additional C-scan parameters will display in the menu.

34. C-scan Setup (cont.)
Select C Scan > Setup to enter the setup screen
Set the Encoder Mode to Timed
Select a Scan Direction (will determine the display view of the A-scan and C-scan image)
Select whether to Save Ascan images for each point on the C-scan
The current Scan File Size based on the selected parameters is displayed. This parameter cannot exceed the Max File Size of approximately 70Mb.
Press the [ESCAPE] key to return to the live screen.

35. Creating a C-scan To acquire data for your C-scan
Set the C Scan > Mode to Start
Once started, the scan will automatically move at a fixed rate along the timed axis
Move your encoder and probe along your test piece to capture C-scan data

36. Return to Presentation Contents Reviewing Acquired C-Scan Data
Demonstration Procedure: Zero Degree Flaw Inspection

37. Reviewing Acquired C-scan Data

38. Completing a C-scan
Once you have acquired all the data from a particular section or have finished your entire scan, you can choose to Stop or Freeze the C-scan.
Stopping a scan will complete the scan. New C-scans will be started from the start coordinate or zero point depending on the scan mode.
Freezing a scan will bring you to Review mode. When the scan is unfrozen you can continue the scan from the point where the scan was frozen.
vs.
C Scan > Mode
[FREEZE]

39. Start/Stop Function The Start/Stop function is used to end your C-scan
For convenience, the [CHECK] key can also be pressed when Start is highlighted to Stop a C-scan.
Once a C-scan is stopped, you will need to save and recall the scan in order to review the data.
When the C-scan is started again it will create a new scan from the start point rather than resume from the last captured point.

40. Freeze Function
When you have finished your scan section, or to pause and review your acquired data, press the [FREEZE] key to enter Review Mode.
An “F” icon will display to the left of the scan to indicate that you are reviewing a frozen scan.
The Start/Stop Mode controls will be disabled when review mode is active.

41. Freeze Function (cont.)
Entering Review Mode allows use of the following functions/features, which are explained further in this section:
Image cursors (D.T., Angle, Index)
Viewing source S-scan or E-scan images
Sizing cursors (X, Y)
Changing gate source data (Gate 1 or 2, Amplitude or Depth)

42. Image Cursors
Image cursors are available on frozen C-scans and allow you to individually select all points on the C-scan.
The distance traveled (D.T.) cursor selects a specific distance or timed point along the scan axis.
The Angle or Index cursor selects a specific focal law or aperture along the probe.
If selected in C-scan setup, a compressed A-scan will be stored for each point on the C-scan. The image cursors are used to choose a particular C-scan point to view the A-scan image.
These cursors will display as white lines on the C-scan image.

43. Image Cursors– Distance Traveled (D.T.) Cursor
To adjust the D.T. cursor select PA Cursors > D.T.
For encoded C-scans, the D.T. cursor will select a specific encoder position along the scan axis in inches or mm.
For timed C-scans, this cursor will correspond to a specific screen pixel along the scan axis.
Encoded C-scan from S-scan
Timed C-scan from linear scan
Encoded C-scan from linear scan

44. Image Cursors– Angle/Index Cursor
To adjust the Angle/Index cursor select press the [ANGLE] key
For C-scans created from S-scans, the Angle cursor is used to select a specific focal law within the selected angle range of the sector scan.
For C-scans created from linear scans, the Index cursor selects a particular aperture group of elements along the length of the probe.
Encoded C-scan from S-scan
Encoded C-scan from linear scan

45. Screen Views
In Review mode, you can view the S-scan or linear scan from which a C-scan point was generated.
NOTE: You will not be able to adjust gate position or range on the stored C-scan or linear scans. Angle/Index can be adjusted.
After selecting the specific C-scan point using the image cursors, simply adjust the C Scan > Screen view to display the sector or linear scan for the selected C-scan point (D.T., Index/Angle).

46. Sizing Cursors
Phased array sizing cursors are also available for basic flaw sizing on the C-scan image.
Based on your screen view, the X and Y cursors will be correspond to focal law (angle) or position along the probe (index) and distance traveled (scan axis).
To turn the sizing cursors ON, select PA Cursors > Cursors.
The X and Y cursors can then be adjusted to take measurements in both directions along the scan.
If you are selected in Auto mode, the relevant cursor measurements will be displayed in the measurement boxes above the scan.

47. Sizing Cursors (cont.)
Encoded C-scans created from S-scans provide information over a sweep of angles and show flaw position along the encoded scan axis.
Encoded C-scans created from linear scans provide an electronic scan of indexes that properly scale defects along the length of the probe and show flaw position along the encoded scan axis.
Timed C-scans do not provide position information along the scan axis as this timed axis is not to scale.

48. Sizing Cursors (cont.)
Encoded C-scan from linear scan with sizing cursors.
Timed C-scan from linear scan with sizing cursors.
X cursors size in scan direction
Y cursors size along probe length using indexes
X cursors not used since scan direction is timed and not to scale
Y cursors size along probe length using indexes

49. Sizing Cursors– Shading
In order to more clearly view the area being sized, you can choose to shade the area surrounded by the X and Y sizing cursors.
To shade the sizing area, select Display Setup > Contrast.
As the contrast is increased, the sizing area will become darker shaded in blue
NOTE: This contrast feature also controls the contrast of the weld overlay if this feature is being used.

50. Gate Source Data
Depth and amplitude data for gates 1 and 2 are collected when a C-scan is created.
After acquiring a C-scan, the user can adjust both C Scan > Source parameters to view other relevant C-scan data.
Gate 1
Depth
Amplitude
Gate 2

51. Compressed View
Since encoded C-scans allow for data collection for lengths longer than the screen width, you can compress a C-scan to view the entire scan on screen all at once.
To turn compressed view ON, select C Scan > Compressed

52. S-scan with Amplitude Palette S-scan with Corrosion Palette
Color Palettes
Additional color palettes are available for phased array images to provide different color scales for use with varied applications.
To change the color palette
Select PA Display > Scan Palette (Depth Palette for depth C-Scans)
Or select Display Setup > Color Setup.
The user can also manually modify the color scale of any of the PA color palettes (Display Setup > Color Setup)
NOTE: Color Palette adjustment will not affect any of the raw data displayed on the A-Scan and will only change the color scale on the PA scan image.
S-scan with Amplitude Palette
S-scan with Corrosion Palette

53. Color Palettes– Color Adjustment: Amplitude
Each of the color palettes has a preset color scale that is applied over the full range of signal amplitudes from 0-110% FSH.
The user can adjust the maximum and minimum amplitude color values using the parameters below under Amplitude Palette Control settings:
Palette Start: sets the upper color threshold for signals above the set amplitude
Palette End: sets the lower color threshold for signals below the set amplitude
The new adjusted color scale will be displayed to the left of the settings in the Color Setup menu.

54. PA Color Palette Adjustment- Amplitude
Default settings for Amplitude Scan Palette
Adjusted S-Scan using modified Amplitude Scan Palette:
Palette Start adjusted from 0% to 20%
All echoes below 20%FSH are displayed in white on the S-Scan.

55. Color Palettes– Color Adjustment: Depth
For Depth C-Scans, the color palette scale is set in one of two ways depending on how the Source parameter is set:
Gate: The color scale is set with the gate start and end points as the minimum and maximum values of the scale with the colors distributed evenly over the gate width.
Custom: The user manually sets the start and end points of the color scale. The colors are then distributed evenly between the start and end points.
NOTE: The Reference Cursors on the A-Scan can be helpful in determining start and end points.
The user can also select how many color levels to use to span across the start and end points using Depth Palette Levels

56. Color Palettes– Color Adjustment: Depth
Default Palette Source set to Gate:
Four palette levels distributed over gate width 1”

57. Color Palettes– Color Adjustment: Depth
Palette Source changed to Custom:
Gate 1 points adjusted to capture only the area of part containing flaws
Four palette levels now distributed over flaw area only
Colors can also be adjusted to include entire part thickness without interference from gated initial pulse or backwall echo 1”

58. PA Color Palette Adjustment- Depth
Adjusted timed C-Scan using Custom Depth Scan Palette. Color gradient restructured around hole depth rather than gate position
Initial timed C-Scan using Corrosion Scan Palette and Gate Source

59. Saving a C-scan
The complete C-scan and compressed A-scans can also be stored in the instrument datalogger for later review.
To save a C-scan:
Create and Open a file of the desired type
With the C-scan on screen, press the [SAVE] key
The C-scan can be saved either while frozen in Review Mode or when in Stopped mode.

60. Recalling a C-scan
After recalling a saved C-scan from the Review datalogger menu, press the [ESCAPE] key to exit Recall mode.
To enter Review mode, press the [FREEZE] key. All the features available when reviewing a frozen C-scan will now be available.

61. Recalling a C-scan
If you have recalled a C-scan from an incremental (INC) file, you will need to press the [ESCAPE] key after the scan is recalled to return to the live screen.
The “R” on the right side of the waveform indicates that you are in Recall mode.

62. Return to Presentation Contents Tips for Weld Inspection
Demonstration Procedure: Zero Degree Flaw Inspection

63. Tips for Weld Inspection

64. Required Equipment Transducer and Wedge Encoder and Adaptor cable
5L16-9.6X10-A10P-P-2.5-OM 16 element PA probe
SA10-N55S wedge
Encoder and Adaptor cable
ENC1-2.5-DE Mini-Wheel Encoder
CABL EP1000i Adaptor Cable
Weld Sample
Any weld sample with known flaws similar to the one shown above will work for this demonstration
Couplant
D-12 Gel Type couplant

65. Tips for Weld Inspection
For demonstration of the encoded C-scan feature on a weld, use a weld sample with known flaws
This can be done on any weld sample, which will have different flaws than the one used here
Encoded C-scans add an additional dimension to standard S-scans by capturing data across a sweep of angles at multiple probe positions along the weld axis.
Encoded Scan Axis
40 to 70 Degree Angle Sweep

66. Locating Weld Geometry
Begin with a fully calibrated S-scan, and face the probe toward a side of the weld plate and determine the position of probe to see first and second leg signals from top and bottom of the plate.
Then position the probe at this same offset distance to the weld to view reflections from the weld root and weld crown.
Weld Geometry

67. Weld Overlay
The Weld Overlay feature can also be used to assist in locating weld geometry on your sector scan.
By inputting your distance away from the centerline of the weld, you can position a basic image of the weld over your S-scan to aid in identifying weld echoes
Weld Centerline
Probe Front Cursor

68. Depth Gate Adjustment
Based on the specific flaws in your particular weld sample, you can set the depth gates to capture a particular flaw in a C-scan.
Depth gates are especially helpful in weld inspection applications because you can capture an entire leg of a part in a single scan.
Using leg indicators will allow you to position the gate to create a complete C-scan for a given leg.
Depth gates set to capture second leg data
Be sure to set your range so that you are capturing depth data at all focal laws in a given leg!

69. Completed C-scan Overview
Weld geometry can be easily identified on a C-scan as root and crown echoes will appear at each probe position for a particular angle or index
Weld Geometry
Flaw Indications

70. Analysis with Cursors
Once you have completed your C-scan, press the [FREEZE] key to enter Review Mode
The D.T. and Angle/Index cursors can be used to select a specific point on the C-scan for flaw analysis
Sizing cursors can be used on the C-scan image to find the length of a flaw along the weld axis
Switching the screen view will show you the S-scan from which the selected C-scan point was created
D.T. and Angle Cursors

71. Angled Linear Scans
Angled linear scans can be beneficial when looking for porosity in welds
Crack
Porosity

72. Return to Presentation Contents

73. Demonstration Procedure: Zero Degree Flaw Inspection

74. Required Equipment Transducer and Wedge Encoder and Adaptor cable
5L X10-A12-P-2.5-OM 64 element PA probe
SA12-0L wedge
Encoder and Adaptor cable
ENC1-2.5-DE Mini-Wheel Encoder
CABL EP1000i Adaptor Cable
Test Block
EP1000-PABLOCK-1 Phased Array Aluminum Demo Block
Couplant
D-12 Gel Type couplant

75. C-scan Setup
Begin with a fully calibrated linear scan

76. C-scan Setup (cont.) Set Range to 1.000”
Turn Gate 2 ON (Gate 2 > Status)
Set up the Gate start positions and widths as shown

77. C-scan Setup (cont.) Attach 5L64-A12 probe to encoder
Perform encoder calibration
Turn C-scan option On (C Scan > C Scan)
Set Source (P3) to Amplitude
Set Source (P5) to Gate 1

78. C-scan Setup (cont.)
Select C Scan > Setup to enter the setup screen
Set the Encoder Mode to Bi Directional
Set the Direction to Left to Right
Set your Scan Resolution to in.
Set the Start Co-ordinate to in.
Set the End Co-ordinate to in.
Set Save Ascan to Store All

79. C-scan Setup (cont.)
Place the PA Demo Block on its side with the three flat bottom holes (FBH) facing down
Place the 64 element probe on top of the block in the middle of the block, spanning the 3” height of the block over the area with flat bottom holes (FBHs)
Press [P2] Mode and press [CHECK] to Start
Slowly move the probe to the right towards the edge of the block
After acquiring the C-scan, press the [FREEZE] key to enter Review Mode

80. Zero Degree C-scan Overview
Stored A-scan for selected C-scan point
Amplitude C-scan of 3 FBHs
Linear Scan Axis (length along probe)
Encoded Scan Axis (distance traveled by encoder)

81. Using Sizing Cursors on the C-scan
Encoded zero degree C-scans provide a top-down planar view of the test piece with properly scaled data collected along both axes of the scan.
Sizing cursors positioned along the length of the probe and the encoded scan axis can be used to find the approximate dimensions of a given flaw.
Use the PA Cursors group menu to adjust X and Y cursor positions
[P1] toggles the X and Y cursors On and Off
P2, P3, P4, and P5 adjust cursor positions

82. Using Sizing Cursors on the C-scan (cont.)
To find the Width or Length of the FBH:
Position the X1 or Y1 cursor to intersect the yellow amplitude area to the left of the FBH indication (-6dB point of image)
Position the X2 or Y2 cursor to intersect the yellow amplitude area to the right of the backwall indication (-6dB point of image)
Use the X2-X1 or Y2-Y1 digital measurement to establish the width or length of the FBH
X Cursors
Y Cursors

83. Reviewing Saved Linear Scan Data
A linear scan image will be saved for each point on the C-scan.
Use the D.T. (PA Cursors > D.T.) and Index ([ANGLE]) cursors to locate the peak A-scan echo from the large FBH on the C-scan.
D.T. Cursor
Index Cursor

84. Reviewing Saved Linear Scan Data (cont.)
Switch the C Scan > Screen to view the linear scan that was used to create that particular C-scan point.
Large FBH
Backwall Reflection
Backwall Dropout

85. Using Sizing Cursors on the Linear Scan
The linear scan can be used to find the true depth of the selected FBH.
To find the Depth of the FBH:
Position the Y1 cursor to intersect the peak amplitude of the FBH indication
Position the Y2 cursor to intersect the peak amplitude of the backwall indication
Use the Y2-Y1 digital measurement to establish the depth of the FBH
Y Cursors

86. Return to Presentation Contents

87. Attaching the Mini-Wheel Encoder

88. Attaching the Mini-Wheel Encoder
The following slides detail how to properly attach the Mini-Wheel encoder to your 5L16-A10P and 5L64-A12 probes for encoded C-scans.
Please note that there are many ways to attach these parts depending on application and user preference.

89. 5L16-A10 or 5L16-A10P with SA10-N55S (or SA10-0L)

90. Required Equipment 5L16-A10P (U8330661) Probe
Encoder Compatible Wedges
SA10-0L (U ) or SA10-N55S (U )
Mini-Wheel Encoder (U )
Hexagonal key screwdriver (included with encoder)
Mounting Hardware (see image, included with encoder)
Brackets A and B
(2) small hex screws
Bracket A
Bracket B
Small Hex Screws

91. Encoder Attachment– 5L16-A10P
To attach the Mini-Wheel encoder to your 5L16-A10P probe:
Begin with your SA10-N55S (or SA10-0L) wedge attached to your probe using couplant
Note the location of the threaded hole on the side of the wedge
Attach Bracket A to the side of the wedge using (1) small hex screw with the round extrusion on the bracket fitting into the notch on the wedge.

92. Encoder Attachment– 5L16-A10P (cont.)
Attach Bracket B to the spring rod on the encoder with the oval slot facing toward the back of the encoder as shown.
Use the second small hex screw to attach bracket B on top of Bracket A sliding to the front of the slot in Bracket B.

93. Encoder Attachment– 5L16-A10P (cont.)
Place the probe on the scanning surface so that the center of the wedge is flat.
Loosen the screw on Bracket B to and adjust the encoder position so that the back of the encoder does not touch the scanning surface and the encoder wheel turns when the probe is moved. Then retighten the screw.

94. 5L64-A12 with SA12-N55S
(or SA12-0L)

95. Required Equipment 5L64-A12 (U8330593) Probe Encoder Compatible Wedges
SA12-0L (U ) or SA12-N55S (U )
Mini-Wheel Encoder (U )
Hexagonal key screwdriver (included with encoder)
Mounting Hardware (see image, included with encoder)
Brackets A, B, and C
(2) small hex screws

96. Encoder Attachment– 5L16-A10P
To attach the Mini-Wheel encoder to your 5L16-A10P probe:
Begin with your SA10-N55S (or SA10-0L) wedge attached to your probe using couplant
Note the location of the threaded hole and larger oval notch in front of the threaded hole on the side of the wedge
Attach Bracket A to the side of the wedge using (1) small hex screw with the round extrusion on the bracket fitting into the oval notch on the side of the wedge

97. Encoder Attachment– 5L16-A10P (cont.)
Attach Bracket B to the spring rod on the encoder with the oval slot facing toward the back of the encoder as shown.
Use the second small hex screw to attach bracket B on top of Bracket A sliding toward the back of the slot in Bracket B.

98. Encoder Attachment– 5L16-A10P (cont.)
Place the probe on the scanning surface so that the center of the wedge is flat.
Loosen the screw on Bracket B to and adjust the encoder position so that the back of the encoder does not touch the scanning surface and the encoder wheel turns when the probe is moved. Then retighten the screw.

99. Return to Presentation Contents
Return to Encoder Calibration (from S-scan)
Return to Encoder Calibration (from Linear scan)

100. Encoder Calibration

101. Required Equipment
Before creating an encoded C-scan, you must calibrate the encoder to determine the correct encoder resolution to ensure accurate distance traveled data.
Required Equipment:
Encoder
Phased array probe and wedge
Ruler, ideally at least 6 in. (150 mm)

102. Calibration Setup
Once the encoder has been properly attached to your probe:
Enter the Encoder > Calibration menu
Press [P3] to Reset the encoder pulses and D.T. values
Set the Start and End points to be used for the calibration
Using a greater calibration distance will increase encoder resolution accuracy as error is averaged over a larger distance.

103. Encoder Calibration
Position the front of the probe at the zero mark (start point) on your ruler
Press [P1] Cal Start to begin the calibration
Move the probe until the front is at the end point (6 in.) on your ruler
Press [P1] End Cal to complete the calibration

104. Encoder Calibration (cont.)
After the calibration has been complete, the newly calculated Encoder Resolution will display.
The resolution for the Mini-Wheel Encoder should be approximately 76 pulses/inch (3 pulses/mm).
Press the [ESC] key to return to the live screen

105. Return to Presentation Contents Return to C-scan Setup (from S-scan)
Return to C-scan Setup (from Linear scan)