4 Conventional UT B-scan Option B-scan software option now available for use in UT mode!Encoded or time basedNew cable for connection to B-scan buggyNEW Single Value or Cross Sectional B-scan
5 Conventional UT B-scan Option Available beginning with software versionOnce option is purchased it is remotely activated on the EPOCH 1000
6 Key Features Three B-Scan Inspection Modes Display Modes Bi-Directional encodedEncoder is active. Scan moves in the same direction as encoder.Uni-Directional encodedEncoder is active. Scan moves forward when encoder moves forward or backward.Manual non-encoded (Timed)The encoder is not active. B-Scan updates according to a time rate that is set with the PRF control.Display ModesB-Scan only (Single Value or Cross-Sectional)B-Scan and A-Scan simultaneously
7 Key Features (cont.)Ability to store ALL A-scans during B-scan collectionEPOCH XT only allowed for A-scan storage on alarm trigger or minimum depthMaximum Scan Rate has been increased to up to 1200 HzWith A-Scan Storage active the maximum scan rate is 800 HzNOTE: The scan rate is equal to the PRF for values less than or equal to the maximum scan rate.
8 Key Features (cont.)B-Scan is compatible with Echo-to-Echo for coated surfaces or when there is a varying water path.Gate 1 width must be set wide enough to completely cover Gate 2 to avoid loss of signal.Cross-Sectional B-scan draws the B-scan image based on full A-scan amplitude data, regardless of gate positionCan be viewed live or after a scan has been capturedA-scan storage must be ON in order to view
10 Parts Required for B-Scan EPOCH 1000 B-Scan Software OptionEP1000-BSCAN (U )EPOCH 1000 Encoder CableEP1000-ENC-CBL-10 (U )Also available in 25, 50, or 100 foot lengthsEncoder BuggyBSCAN-ENC (U )TransducerTypically a D790-SM (U )Transducer Cable: Choose length to match encoder cableBNC: BCMD B (U )LEMO: L1CMD B (U )
11 B-Scan KitsMost customers choose to purchase B-Scan kits that contain the Instrument Software Option, B-Scan Encoder Buggy, and B-Scan Encoder CableEP1000-BSCAN-KIT-10: 10 foot encoder cable (U )EP1000-BSCAN-KIT-25: 25 foot encoder cable (U )EP1000-BSCAN-KIT-50: 50 foot encoder cable (U )EP1000-BSCAN-KIT-100: 100 foot encoder cable (U )The transducer and transducer cable must be purchased separately.
12 B-Scan Encoder & Accessories D790-SMTransducer CableEncoder Cable InputProbe HolderWater InputOptional Extension Pole BracketOptional Magnetic Wheels
14 Option ActivationThe EPOCH 1000 must be updated to Operating Software version or higherIf the B-scan option has been purchased, it can be turned on using the B scan menu
15 Option Activation (cont.) If the B-Scan Option is NOT activated in your instrument, contact your local Olympus NDT representative to purchase this optionOnce this software option is purchased it can be remotely activated on the EPOCH 1000i via a software code provided
16 Menus and InterfaceTo turn on the B-scan option, select B Scan > BScan = OnWhen B-scan is turned on, new sets of group menus appear
17 Menus and Interface (cont.) While B-scan is ON, menu 5/6 will now contain additional parameters and controls for use in B-scan inspectionsEncoderUsed to perform an encoder calibrationCursorsPosition controls for X and Y sizing cursorsToolsStatistics and other post-analysis functionsDatalogger and reporting functions will now be located in menu 6/6
18 B-scan Menu The controls in the B scan menu are as follows: Screen: Selects views of A-scan/B-scan or B-scan onlyMode: Starts or Stops B-scan acquisitionSource: Selects type of B-scan imagesingle value or cross-sectionalCorrelated View: Selects alignment of A-scan and imageSource: Builds B-scan image from selected Gate
19 Additional FeaturesA Minimum Depth Alarm may be used to alert the operator to areas where the part thickness has dropped below a user defined threshold.The Floating Gate option is included with the purchase of the B-scan software and may be used to set the gate heightGate can be set at a level from -1dB to -14dB from the height of the gated echo.Avoid echo drop out when scanning on heavily corroded parts.Maximize measurement consistency by measuring at the same point on the edge of the echo envelope.Floating gate can be set in the Gate Setup > Setup menu
21 Creating an Encoded B-scan The EPOCH 1000 must be properly setup and calibrated before the B-Scan option is turned ON.Pulser / Receiver SettingsCalibrate for Zero Offset and VelocityGate 1 should be setup to cover the minimum and maximum expected thickness values for the inspection.The screenshots below show a complete setup ready for B-Scan to be turned on.
22 Equipment SetupFor encoded B-scans, a positional encoder is used to track distance traveled along the scan axis.The standard encoder for use with B-scan is the encoder buggyInsert your transducer into the B-scan buggy and tighten the thumb screws to secureAttach the transducer cable to the transducer and to the EPOCH 1000Attach the encoder cable to the encoder buggy and EPOCH 1000
23 Encoded B-scan SetupNow you are ready to set up your B-scan using the following steps:Turn ON the option in the B Scan > BScan menu.Once the B-scan option is turned on, additional B-scan parameters will display in the menu.
24 Encoded B-scan Setup (cont.) Select B Scan > Setup to enter the setup screenChoose an Encoder Mode (Uni or Bi-directional)Select a Direction (will determine the display view of the A-scan and B-scan image)Set your Scan Resolution (spacing between B-scan points)This value will determine the maximum scanning speed.
25 Encoded B-scan Setup (cont.) The Encoder Resolution for the B-scan encoder buggy is 200 pulses/in. (7.87 pulses/mm)If you are using a different encoder, you should perform an encoder calibration to determine the encoder resolution.The value from the encoder calibration will automatically populate from the encoder calibrationFor instructions on how to calibrate the encoder, please use the following link: Encoder Calibration
26 Encoded B-scan Setup (cont.) Set the desired Start and End Co-ordinates for the scanSelect whether to Save Ascan imagesYou must be saving A-scan images in order to create a cross-sectional B-scanIf a cross-sectional B-scan for Gate 2 is being used, select the Amplitude Decimation factorGate 1 amplitude compression is automatically set to maximumThe current Scan File Size based on the selected parameters is displayed.This parameter cannot exceed the Max File Size of approximately 70MbPress the [ESCAPE] key to return to the live screen.
27 Collecting B-scan Data To acquire data for your B-scanSet the B Scan > Mode to StartMove your B-scan buggy and transducer along your test piece at the appropriate scan rate so that you do not receive an LOS measurement
28 Thickness limits defined by Gate1 Start and Width A/B-Scan ViewMin Depth AlarmAreas of Scan below Minimum DepthThickness limits defined by Gate1 Start and WidthEncoded Scan axis
30 Creating a Timed B-scan The EPOCH 1000 must be properly setup and calibrated before the B-Scan option is turned ON.Pulser / Receiver SettingsCalibrate for Zero Offset and VelocityGate 1 should be setup to cover the minimum and maximum expected thickness values for the inspection.The screenshots below show a complete setup ready for B-Scan to be turned on.
31 Timed B-scan SetupNow you are ready to set up your B-scan using the following steps:Turn ON the option in the B Scan > BScan menu.Once the B-scan option is turned on, additional B-scan parameters will display in the menu.
32 Timed B-scan Setup (cont.) Select B Scan > Setup to enter the setup screenSet the Encoder Mode to TimedSelect a Direction (will determine the display view of the A-scan and B-scan image)Select whether to Save Ascan imagesYou must be saving A-scan images in order to create a cross-sectional B-scan
33 Timed B-scan Setup (cont.) If a cross-sectional B-scan for Gate 2 is being used, select the Amplitude Decimation factorGate 1 amplitude compression is automatically set to maximumThe 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.
34 Collecting B-scan Data To acquire data for your B-scanSet the B Scan > Mode to StartMove your transducer along your test piece at the appropriate scan rate so that you do not receive an LOS measurementNOTE: If the scan is moving too quickly, lower your PRF to reduce the scan speed!
35 Thickness limits defined by Gate1 Start and Width A/B-Scan ViewMin Depth AlarmAreas of Scan below Minimum DepthThickness limits defined by Gate1 Start and WidthTimed Scan axis
37 What is a Cross-Sectional B-scan? A-scans digitized and mapped to color scale based on amplitude valuesPoints are plotted so that the colors are positioned at the proper depthA-scans from successive transducer positions are "stacked" to form a true few cross-sectional image12Transducer movement3Part depth
38 What is a Cross-Sectional B-scan? (cont.) The depth axis on a cross-sectional B-scan uses the entire screen range, rather than just the gated region as on a single value B-scanDepth (screen range)Scan axis (encoded or timed)
39 Single Value vs. Cross Sectional Single Value B-scan“Traditional” EPOCH B-scan viewSame as EPOCH III, EPOCH 4, EPOCH XT, 37DLPlus, 38DLPlus, etc.Draws a profile view of the test piece based on the gated single thickness value per indexMost commonly used in corrosion scanning applications
40 Single Value vs. Cross Sectional (cont.) Cross Sectional B-scanMuch more similar to phased array images (zero degree linear scan)Draws the B-scan image based on full A-scan amplitude data, regardless of gate positionMore commonly used in zero degree laminar applications
42 Completing a B-scanOnce you have acquired all the data from a particular section or have finished your entire scan, you can choose to Stop or Freeze the B-scan.Stopping a scan will complete the scan. New B-scans will be started from the start coordinateFreezing 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.B Scan > Mode[FREEZE]
43 Saving FilesB-Scan files may be stored in any file type in the EPOCH The most common are:Calibration (CAL) Files: Used to store B-Scan setupsIncremental (INC) Files: Used for most inspection data storageWhen the [SAVE] key is pressed the instrument saves the entire B-Scan along with stored A-Scans and the instrument setup.Saved B-scan files can be recalled as a setup, if desired, through the Files > Open menu in the dataloggerAfter recalling a file, press the [FREEZE] key to enter Review Mode
44 Start/Stop Function The Start/Stop function is used to end your B-scan For convenience, the [CHECK] key can also be pressed when Start is highlighted to Stop a B-scan.Once a B-scan is stopped, you will need to save and recall the scan in order to review the data.When the B-scan is started again it will create a new scan from the start point rather than resume from the last captured point.
45 Freeze FunctionWhen 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.
46 Freeze Function (cont.) Entering Review Mode allows use of the following functions/features, which are explained further in this section:Image cursors (D.T.)Sizing cursors (X, Y)Changing gate source data (Gate 1 or 2, single value or cross-sectional)
47 CursorsOnce a B-scan is acquired, you can perform basic on-board analysis in Review Mode using available cursorsSizing cursors (X, Y) and DT cursor are available in the Cursor menu
48 Distance Traveled (D.T) Cursor The distance traveled (D.T.) cursor selects a specific distance or timed point along the scan axis.For encoded B-scans, the D.T. cursor will select a specific position along the scan axis in inches or mm.For timed B-scans, this cursor will correspond to a specific screen pixel along the scan axis.To adjust the D.T. cursor select Cursors > D.T.The cursor will display as white lines on the B-scan image.
49 Distance Traveled (D.T) Cursor (cont.) If selected in B-scan setup, a compressed A-scan will be stored for each point on the B-scan. The D.T. cursor is used to choose a particular B-scan point to view the A-scan image.To view stored A-scans along with the B-scan, set the B Scan > Screen view to A/B Scan
50 Sizing CursorsSizing cursors are available for basic flaw sizing on the B-scan imageBased on your screen view, the X and Y cursors will be correspond to part depth (thickness) and scan axis (distance or time)The X and Y cursors will form a shaded box around the selected area for easier viewing.To turn the sizing cursors ON, select 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.
51 Compressed ViewSince encoded B-scans allow for data collection for lengths longer than the screen width, you can compress a B-scan to view the entire scan on screen all at once.To turn compressed view ON, select B Scan > Compressed
52 Correlated ViewAligns the thickness axis of the B-scan with the soundpath (depth) axis of the A-scanBest used with cross-sectional B-scan which is plotted over the full range of the A-scanThe alignment of the A-scan and B-scan will match along the part thickness and depth axis
53 B-scan Analysis – Minimum Depth In Single Value B-scan, you can display critical thinning areas in red by adjusting the Min Depth Alarm positionTo adjust the minimum depth select Gate 1 > Min Depth
54 B-scan Analysis – Statistics NEW Tools menu allows the user to display Statistics on the current acquired B-scanTo view the information for the current B-scan, select Tools > Statistics from Review mode
56 Encoder CalibrationThe Encoder Resolution for the B-scan buggy is 200 pulses/in. (7.87 pulses/mm)If you are using a different encoder, you should perform an encoder calibration to determine the encoder resolution.Required Equipment:Encoder and encoder cableTransducer and cableRuler, ideally at least 6 in. (150 mm)
57 Calibration SetupOnce the encoder has been properly attached to your probe:Enter the Encoder > Calibration menuPress [P3] to Reset the encoder pulses and D.T. valuesSet the Start and End points to be used for the calibrationUsing a greater calibration distance will increase encoder resolution accuracy as error is averaged over a larger distance.
58 Encoder CalibrationPosition the front of the probe at the zero mark (start point) on your rulerPress [P1] Cal Start to begin the calibrationMove the probe until the front is at the end point on your rulerPress [P1] End Cal to complete the calibration
59 Encoder Calibration (cont.) After the calibration has been complete, the newly calculated Encoder Resolution will display.The resolution for the encoder buggy should be 200 pulses/in.This value will automatically populate under Encoder Resolution in the B Scan > Setup menuPress the [ESC] key to return to the live screen
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