Olympus NDT
12569 Gulf Freeway
Houston, TX 77034 USA
Tel (281)922-9300 Fax 281-922-9303
olympusNDT.com info@olympusNDT.com
B-SCAN BUGGY DEMO PROCEDURE
CREATED BY CALEB FREDERICK
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Olympus NDT
12569 Gulf Freeway
Houston, TX 77034 USA
Tel (281)922-9300 Fax 281-922-9303
olympusNDT.com info@olympusNDT.com
Overview:
The following procedure will show step-by-step how to
setup the OmniScan MX with the B-Scan Buggy for the
purpose of customer demonstration.
Additional materials needed:
-Acrylic corrosion sample
-D790-SM dual-element transducer
-Dual BNC-to-Microdot cable
Procedure:
1) Connect the Microdot end of the cable to the Microdot
terminals on the D-790 transducer.
2) Connect the BNC end to the BNC connectors on the
OmniScan PA module. Use BNC-to-LEMO adapters if
connecting to a OmniScan UT module.
3) In the Conventional UT menu:
Push the blue menu button, then use the smart knob or
arrow keys to scroll to the “File” icon. With “File”
highlighted, click the √ button.
-Click “Open”
-Using the smart knob, highlight the file BSCANBUGGY.ous
-Click the √ button.
If this file is not available, enter the following parameters.
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Olympus NDT
12569 Gulf Freeway
Houston, TX 77034 USA
Tel (281)922-9300 Fax 281-922-9303
olympusNDT.com info@olympusNDT.com
Note: These settings are for this specific sample only.
Menu: Probe/Part→Select→Select (choose Defines)
-Click Define Probe
-Click New
-“Serial Number” enter D790-SM
-Model, leave as “None”
-Click Save
-Frequency, enter 5 MHz
-Element Size, enter 0.500 inches
-Click Save
-Highlight the new D790-SM listed that you just created.
-Click “Select and Close”
-Click Select (change to Select Tx/Rx)
-Wedge, select Contact
Menu: Probe/Part→Parts
-Geometry, select Plate
-Thickness, select 0.700 inches
(Diameter will be grayed out)
-Material, select Plexiglass
Menu: Display→Selection
-Display, Select B (for B-Scan)
Menu: Display→Overlay
-Cursor, change to On
Menu: Measurements→Reading
-List, select 1
-Group, select Custom
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Olympus NDT
12569 Gulf Freeway
Houston, TX 77034 USA
Tel (281)922-9300 Fax 281-922-9303
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-Field 1, select A% (Peak amplitude in Gate A)
-Field 2, select S(m-r) (Scan axis measurement cursor –
reference cursor)
-Field 3, Select T(A^) (Thickness in Gate A)
-Field 4, Select ML (Percentage of Material Loss)
Menu: Gate/Alarm→Gate
- Gate, select A
- Parameters, select Position
- Start, enter 0.154 in.
- Width, enter 0.673 in.
- Threshold, enter 20
Menu: UT Settings→General
-Gain, enter 33 dB
-Start, 0.00 in.
-Range, 0.900 in.
-Wedge Delay, 0.00 uS
-Wave Type, 0.1 in/uS
-Velocity, 0.0703
Menu: UT Settings→Pulser
-Pulser, 1
-Tx/Rx mode, PC (Pitch-Catch)
-Frequency, 5MHz
-Voltage, 200V
-PW (Pulse Width), Auto
-PRF, Optimum
Menu: UT Settings→Receiver
-Receiver, 1
-Filter, Auto
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Olympus NDT
12569 Gulf Freeway
Houston, TX 77034 USA
Tel (281)922-9300 Fax 281-922-9303
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-Rectifier, FW (Full Wave)
-Video Filter, On
-Averaging, 1
-Reject, 0%
Menu: Scan→Inspection
-Type, One-Line Scan
-Scan, Encoder 1
Menu: Scan→Encoder
-Polarity, Inverse
-Type, Quad
4) The next step is to calibrate the encoder.
Menu: Wizard→Calibration
-Type, Encoder
-Start
-Origin, 0.00 in.
-Next
Mark off a distance of 8 inches on your work surface (this
will cover the distance of the corrosion sample)
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Olympus NDT
12569 Gulf Freeway
Houston, TX 77034 USA
Tel (281)922-9300 Fax 281-922-9303
olympusNDT.com info@olympusNDT.com
8 inches
-Distance, 8.00 in.
Using the center of the probe as the reference point, move
the buggy the 8 inch distance that you marked off.
-Calibrate
-Accept
Menu: Scan→Encoder
-Resolution (value will be entered from calibration)
-Origin, 0.00 (value will be entered from calibration)
Menu: Scan→Inspection
-Max Scan Speed (value will be entered from calibration)
Menu: Scan→Area
-Scan Start, 0.00 in.
-Scan End, 6.5 in.
-Scan Resolution, 0.030 in.
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Olympus NDT
12569 Gulf Freeway
Houston, TX 77034 USA
Tel (281)922-9300 Fax 281-922-9303
olympusNDT.com info@olympusNDT.com
Menu: Scan→Start
-Start
A message will appear saying “This action will erase the
current data. Do you want to continue?”
-Yes
Place the buggy on the right side of the corrosion sample
(facing left)
With firm pressure applied to the top of the buggy, push
the buggy across the length of the sample.
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Olympus NDT
12569 Gulf Freeway
Houston, TX 77034 USA
Tel (281)922-9300 Fax 281-922-9303
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In the upper right-hand corner of the display, verify that the
X axis has moved ~6 inches.
(See picture below)
-Click Pause to freeze and rotate the data
Your data should look like the following picture:
If you want to repeat the scan, click Start.
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Olympus NDT
12569 Gulf Freeway
Houston, TX 77034 USA
Tel (281)922-9300 Fax 281-922-9303
olympusNDT.com info@olympusNDT.com
Analysis:
The blue cursor in the B-Scan displays a specific length
along the scan axis (see picture below) and the associated
A-Scan at that location. In this example, the cursor is 1.710
inches from the start point along the scan axis. The A-
Scan shows the material thickness at this point to be 0.642
inches
Note: The scan data moves from left to right.
Cursors are used for sizing the areas of corrosion.
You can move the cursors to cover the extent of the
corrosion by doing the following:
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Olympus NDT
12569 Gulf Freeway
Houston, TX 77034 USA
Tel (281)922-9300 Fax 281-922-9303
olympusNDT.com info@olympusNDT.com
Menu: Measurements→Cursors
-Selection, change to Data (blue cursor)
-Click Scan and use smart knob to move the Data cursor
along the scan axis
-Selection, change to Reference (red cursors)
-Click UT and use smart knob to move the Reference
cursor vertically (thickness) in the B-Scan with the
associated location in the A-Scan.
Reference Cursors
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Olympus NDT
12569 Gulf Freeway
Houston, TX 77034 USA
Tel (281)922-9300 Fax 281-922-9303
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-Selection, change to Measure (green cursors)
-Click UT and use the smart knob to move the Measure
cursor vertically (thickness) in the B-Scan with the
associated location in the A-Scan.
Measure Cursors
The value in measurement field S(m-r) takes the difference
from the red (Reference) and green (Measure) cursors
along the scan axis. In this example, the corroded area
covers 1.905 inches.
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Olympus NDT
12569 Gulf Freeway
Houston, TX 77034 USA
Tel (281)922-9300 Fax 281-922-9303
olympusNDT.com info@olympusNDT.com
The value in measurement field ML is taken by the blue
Data cursor. In this example, the corrosion has caused a
14.1% material loss.
For further technical support call Olympus NDT – Houston
at 281-922-9300 or toll free at 877-738-3244.
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