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EPOCH 1000 Series Procedure Linear Scan and C-scan

EPOCH 1000 Series Procedure Linear Scan and C-scan. Presentation Contents. Feature Overview Beam Setup and Calibration: 0 Degree Linear Scan Demonstration Procedure: 0 Degree Linear Scan Beam Setup and Calibration: Angle Linear Scan Demonstration Procedure: Angle Linear Scan

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EPOCH 1000 Series Procedure Linear Scan and C-scan

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  1. EPOCH 1000 Series ProcedureLinear Scan and C-scan

  2. Presentation Contents • Feature Overview • Beam Setup and Calibration: 0 Degree Linear Scan • Demonstration Procedure: 0 Degree Linear Scan • Beam Setup and Calibration: Angle Linear Scan • Demonstration Procedure: Angle Linear Scan • Beam Setup and Calibration: 0 Degree C-scan • Demonstration Procedure: 0 Degree C-scan • C-scan Setup: A-scan Storage and View

  3. Feature Overview

  4. Linear Scan and the EPOCH 1000i • Linear Scanning is available as an option on the EPOCH 1000i instrument • Ordering Information: EP1000I-ECSCAN (U8140141) • Linear Scans utilize a group of elements in a phased array probe to acquire multiple A-scans from the area under the probe • The number of elements in a group is less than the total number of elements of the probe • The A-scans are usually captured in sequence to provide an image of the area under the probe at one fixed angle • A common example is using a 64 element probe to pulse groups of 16 elements at a time • 16 elements is known as the aperture of the scan • Image is created by firing elements 1-16, then 2-17, then 3-18, etc NOTE: For full linear scan theory, see the Linear Scan overview at http://www.olympus-ims.com/en/ndt-tutorials/instrumententation/sscan/

  5. Linear Scan and C-scan • Linear scanning allows the user to create a fixed-angle image the same size as the probe width in one dimension • This is called an electronic scan because the pulsing sequence can create an image without physically moving the transducer • By moving the transducer perpendicular to the electronic scan acquisition, the EPOCH 1000i allows the user to create a C-scan image • Combines mechanical scan and electronic scan • The EPOCH 1000i only offers manual C-scan, not encoded

  6. Probe Compatibility • The EPOCH 1000i is compatible with probes with up to 64 elements • This 64 element compatibility is available on every EPOCH 1000i shipped in the past or future • The 64 element probe marketed with the EPOCH 1000i is the A12 style weld probe series transducer: 5L64-38.4X10-A12-P-2.5-OM (U8330593) • Other 64 element probes may be used after the wedge information is manually entered using the wedge/probe EDIT tool

  7. Linear Scan and C-scan Sales Strategy • Even with linear scan and/or C-scan capabilities, the EPOCH 1000i is still a manual inspection instrument • Manual C-scans help provide information about a wide area of the test piece quickly through imaging, but still requires the user to manually prove up a potential defect • Target markets are: • Corrosion mapping • Delaminations in composites, plastics and other materials (aerospace) • Bond/Disbond applications • Weld inspection (fixed angle Linear scan at 45, 60 or 70) • Crack Detection (fixed angle Linear scan at 45, 60 or 70)

  8. Beam Setup and Calibration: 0 Degree Linear Scan

  9. Required Equipment • Test Block • EP1000-PABLOCK-1 Phase Array Aluminum Demo Block • Couplant • D-12 Gel Type couplant • Transducer and Wedge • 5L64-38.4X10-A12-P-2.5-OM 64 element PA probe • SA12-0L wedge

  10. Beam Setup Tool • After attaching the 5L64-A12 probe, the Beam Setup menu should automatically open • In the row Scan Type, select Linear Scan • Select the SA12-0L wedge from the wedge ID list • Adjust other parameters as below

  11. Linear Scan Calibration The calibration method for linear scans is nearly identical to standard calibrations. • Calibrate Velocity • Calibrate Wedge Delay • Calibrate Sensitivity To initially set up the instrument for calibration: • Place the PA Demo Block on its side (flat bottom holes facing down) • Set RANGE to 2.000” • Set GAIN to ~8.0 dB • Set INDEX to 28

  12. Velocity Calibration To calibrate for velocity: • Position the probe facing through a clean 1.000” thickness of the PA Demo Block • Set the Gate1 start and width to capture the first backwall indication • Under the PA Cal group, select the CAL Velocity Calibration mode • Press [P1] (Depth 1) to enter the first known thickness (1.000”) and press [Check] (Continue) • Position Gate 1 to read the second backwall indication • Press [P2] (Depth 2) to enter the second known thickness (2.000”) and press [Check] (Continue)

  13. Wedge Delay Calibration To calibrate for wedge delay: • Position the probe facing through a clean 1.000” thickness of the PA Demo Block • Set the Gate1 start and width to capture the first backwall indication • Under the PA Cal group, select the CAL Zero Calibration mode • Press [P1] (Start) to enter the known thickness (1.000”) and press [Check] (Continue) • All required thickness measurements are capturedfrom the single backwall indication (some movement of the probe may be required) • Press [P2] (Done) to accept the measurements and complete the calibration

  14. Sensitivity Calibration To calibrate for sensitivity: • Position the probe facing through a clean 1.000” thickness of the PA Demo Block • Set the Gate1 start and width to capture the first backwall indication • Under the PA Cal group, select the CAL GAIN Calibration mode • Press [P1] (Add) to begin the calibration process • All required amplitude measurements are capturedfrom the single backwall indication (some movement of the probe may be required) • Press [P2] (Done) to accept the measurements and complete the calibration

  15. Completed Calibration

  16. Demonstration Procedure: 0 Degree Linear Scan

  17. Zero Degree Demonstration Setup • 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 • Set RANGE to 1.000” • Slide the transducer over the FBHs • Each FBH will appear individually (in succession) • Smallest will be closest to backwall reflection and show a lower overall amplitude response • Largest will be closest to midwall and show a larger amplitude response

  18. Zero Degree FBH Reflections Small FBH Large FBH Backwall Reflection Backwall Drop Out

  19. Zero Degree FBH Reflections (cont.) • Rotate the probe 90 degrees so that the length of the probe is in line with the longest length of the block • Position the probe over the three FBHs • All three holes can be seen on screen at the same time at varying depths and amplitudes

  20. Linear Scan Sizing Cursors Since a zero degree linear scan shows true depth of flaws, as well as providing an electronic scan of indexes that properly scale the imaged defects, phased array sizing cursors can be used to establish sizing of flaws that are visible on screen • Press the FREEZE key • Use the PA Cursors group menu to adjust X and Y cursor positions • P1 and P4 toggle the X and Y cursors ON and OFF • P2, P3, P5, and P6 adjust cursor positions • To find the HEIGHT 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 height of the FBH Y1 Cursor Y2 Cursor

  21. Linear Scan Sizing Cursors (cont.) Since a zero degree linear scan shows true depth of flaws, as well as providing an electronic scan of indexes that properly scale the imaged defects, phased array sizing cursors can be used to establish sizing of flaws that are visible on screen • To find the WIDTH of the FBH • Position the X1 cursor to intersect the yellow amplitude area to the left of the FBH indication (-6dB point of image) • Position the X2 cursor to intersect the yellow amplitude area to the right of the backwall indication (-6dB point of image) • Use the X2-X1 digital measurement to establish the width of the FBH X1 Cursor X2 Cursor

  22. Beam Setup and Calibration: Angle Linear Scan

  23. Required Equipment • Test Block • TB7541-1 IIW Block • EP1000-PABLOCK-1 Phase Array Aluminum Demo Block • Couplant • D-12 Gel Type couplant • Transducer and Wedge • 5L64-38.4X10-A12-P-2.5-OM 64 element PA probe • SA12-N55S wedge

  24. Beam Setup Tool • After attaching the 5L64-A12 probe, the Beam Setup menu should automatically open • In the row Scan Type, select Linear Scan • Select the SA12-N55S wedge from the wedge ID list • Set the Angle to 45 degrees • Adjust other parameters as below

  25. Linear Scan Calibration The calibration method for linear scans is nearly identical to standard calibrations. • Calibrate Velocity • Calibrate Wedge Delay • Calibrate Sensitivity To initially set up the instrument for calibration: • Set RANGE to 9.200” • Set GAIN to ~14.0 dB • Set INDEX to 20

  26. Velocity Calibration To calibrate for velocity: • Position the probe facing the radius of the IIW block • Peak up the radius reflection at Index 20 • Set the Gate1 start and width to capture the 4.000” radius indication • Under the PA Cal group, select the CAL Velocity Calibration mode • Press [P1] (Depth 1) to enter the first known soundpath (4.000”) and press [Check] (Continue) • Position Gate 1 to read the 9.000” backwall indication and increase gain as necessary • Press [P2] (Depth 2) to enter the second known soundpath (9.000”) and press [Check] (Continue)

  27. Wedge Delay Calibration To calibrate for wedge delay: • Position the probe facing the radius of the IIW block • Set the Gate1 start and width to capture the 4.000” radius indication • Under the PA Cal group, select the CAL Zero Calibration mode • Stay in Soundpath calibration mode • Press [P1] (Start) to enter the known soundpath (4.000”) and press [Check] (Continue) • Move the probe forward and backward to acquiremeasurements across all index points • Press [P2] (Done) to accept the measurements and complete the calibration

  28. Sensitivity Calibration To calibrate for sensitivity: • Position the probe facing the small side drilled hole of the IIW block • Set RANGE to 2.500” and INDEX to 0 • Set the Gate1 start and width to capture the SDH reflection across all index points • Peak up the SDH signal at index 0 • Under the PA Cal group, select the CAL GAIN Calibration mode • Press [P1] (Add) to begin the calibration process • Move the probe backward and forward to acquireamplitude measurements from the SDH • Press [P2] (Done) to accept the measurements and complete the calibration

  29. Completed Calibration

  30. Demonstration Procedure: Angle Linear Scan

  31. 45 Degree Demonstration Setup • Place the probe on top of the PA Demo Block on the opposite side from the cluster of SDHs • Set RANGE to 5.000” • Slide the probe across the top of the block • Each SDH will appear individually and move horizontally across the screen at varying depths • The cluster of SDHs will be visible at a depth of around 3.000”

  32. 45 Degree SDH Reflections 1 inch deep SDH ½ inch deep SDH Cluster of SDHs

  33. 45 Degree Notch Reflections • Lay the PA Demo Block on its side with the FBHs facing down • Set RANGE to 3.000” • In the PA Probe group, use the BEAM tool to set the THICKNESS to 1.000” • Orient the probe so that the length of the probe is in line with the longest length of the block, facing the notches

  34. 45 Degree Notch Reflections (cont.) • Move the probe forward and backward along the length of the block to detect the corner trap of each notch • The corner trap will occur along the first leg indicator on screen • Position the probe so the probe front is just over the edge of the block and the side of the probe is aligned with the long edge of the block containing the notches • Two reflections appear • Corner trap of notch • Corner trap of edge • Move the probe from the side of the block to the middle • The notch corner trap drops out • The edge corner trap remains

  35. 45 Degree Notch Reflections (cont.) 1 2 Probe Position 1 Probe Position 2

  36. Beam Setup and Calibration: 0 Degree C-scan

  37. Required Equipment • Test Block • EP1000-PABLOCK-1 Phase Array Aluminum Demo Block • Couplant • D-12 Gel Type couplant • Transducer and Wedge • 5L64-38.4X10-A12-P-2.5-OM 64 element PA probe • SA12-0L wedge

  38. Beam Setup Tool • After setting up the Linear Scan settings in the Beam setup tool, the operator can also create settings for an associated C-scan • In the row Scan Type, select C-Scan • Adjust other parameters as below • NOTE: A-scan setup is covered in a subsequent section

  39. The calibration method for Linear C-scans is nearly identical to standard calibrations Calibrate Velocity Calibrate Wedge Delay Calibrate Sensitivity To initially set up the instrument for calibration: In the C-scan group, press [P1] (Screen) Select A/L Vert Follow the procedure to calibrate a zero degree linear scan Zero Degree C-scan Calibration

  40. C-scan Interface Overview The C-scan group has several controls to set up the information acquired during a Linear scan C-scan: • SCREEN: Single or combination view of Cscan, Linear Scan, Ascan, etc • MODE: Starts or Stops the Cscan acquisition • SOURCE (P3): Measurement source for Cscan (either Amplitude or Depth)* • NEW SCAN: Clears current scan and begins a new scan • BEST FIT: Stretches the image to fill the screen • SOURCE (P6): Measurement gate used to acquire Cscan image* *All source data is acquired regardless of setting, allowing the user to review other source data after the scan is complete.

  41. Demonstration Procedure: 0 Degree C-scan

  42. Zero Degree C-scan Demonstration Setup • 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 • Set RANGE to 1.000” • Turn Gate 2 ON • Set up the Gate start positions and widths as shown • Set SOURCE (P3) to Amplitude • Set SOURCE (P4) to Gate 1

  43. Zero Degree FBH C-scan • Position the probe over the area with flat bottom holes (FBHs) • Press the [P2] (Mode) key and toggle to START • Slowly move the probe towards the edge of the block • After acquiring C-scan, use the [P2] (Mode) key to STOP the C-scan acquisition

  44. Zero Degree FBH C-scan (cont.) Live A-scan (even when Mode = STOP) Amplitude C-scan of 3 FBHs Linear Scan Axis (properly scaled) Timed Scan Axis (NOT properly scaled)

  45. Stored Source Data After acquiring a C-scan, the user can adjust both SOURCE parameters to view other relevant C-scan data Gate 1 Depth Amplitude Gate 2

  46. C-scan Setup: A-scan Storage and View

  47. A-scan Setup • Scan Direction: C-scan orientation • Save A-scan: Similar to A-scan storage for EPOCH XT B-scan • No Storage: No A-scan saved for reporting • Store on Alarm: Stores compressed A-scan whenever a Gate alarm is triggered during C-scan acquisition • Store All: Stores all compressed A-scans during C-scan acquisition (limit TBD) • Active A-scan: Determines the mode of the live A-scan • Composite: Single A-scan view compositing all apertures into one view • Index selection not available because all indexes are represented in live view • Aperture: A-scan representing only the active aperture • User must select index in live screen

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