UT Testing-Section 4 Calibration Methods

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Content: Section 4: Calibration Methods 4.1: Calibration Methods 4.2: The Calibrations 4.2.1: Distance Amplitude Correction (DAC) 4.2.2: Finding the probe index 4.2.3: Checking the probe angle 4.2.4: Calibration of shear waves for range V1 Block 4.2.5: Dead Zone 4.2.7: Transfer Correction 4.2.8: Linearity Checks (Time Base/ Equipment Gain/ Vertical Gain) 4.2.9: TCG-Time Correction Gain 4.3: Curvature Correction 4.4: Calibration References & Standards 4.5: Questions & Answers 4.6: Video Time
4.1: Calibration Methods Calibration refers to the act of evaluating and adjusting the precision and accuracy of measurement equipment. In ultrasonic testing, several forms of calibration must occur. First, the electronics of the equipment must be calibrated to ensure that they are performing as designed. This operation is usually performed by the equipment manufacturer and will not be discussed further in this material. It is also usually necessary for the operator to perform a "user calibration" of the equipment. This user calibration is necessary because most ultrasonic equipment can be reconfigured for use in a large variety of applications. The user must "calibrate" the system, which includes the equipment settings, the transducer, and the test setup, to validate that the desired level of (1) precision and (2) accuracy are achieved. The term calibration standard is usually only used when an absolute value is measured and in many cases, the standards are traceable back to standards at the National Institute for Standards and Technology.
Page 1: Section 4: Calibration Methods
Page 5 and 6: In ultrasonic testing, there is als
Page 7 and 8: Introduction to the Common Standard
Page 9 and 10: The IIW Type Calibration Block
Page 11 and 12: The IIW Type I Calibration Block
Page 13 and 14: The IIW Phase Array Calibration Blo
Page 15 and 16: The IIW Calibration Block 2 nd Chec
Page 19 and 20: Find probe angle Find Index/Range/R
Page 21 and 22: V2 Calibration Block
Page 23 and 24: Calibration Blocks
Page 25 and 26: The standard shown in the above fig
Page 27 and 28: IIW Blocks- IIW Type US-2
Page 29 and 30: V1/5, A2 Block
Page 31 and 32: DSC Block, Mini block, Rompas Block
Page 33 and 34: A block that closely resembles the
Page 35 and 36: Calibration Range Using DSC AWS Blo
Page 37 and 38: AWS Shear Wave Distance Calibration
Page 39 and 40: AWS Resolution Calibration (RC) Blo
Page 41 and 42: 30 FBH Resolution Reference Block T
Page 43 and 44: Step and Tapered Calibration Wedges
Page 45 and 46: Area Amplitude Blocks provide stand
Page 47 and 48: The ASTM basic set of Area/Distance
Page 49 and 50: ASTM E 127
Page 51 and 52: Distance-Amplitude #3, #5, #8 FBH B
Page 53 and 54:
Q56: On the area-amplitude ultrason
Page 55 and 56:
4.2: The Calibrations 4.2.1: Distan
Page 57 and 58:
http://www.huatecgroup.com/china-di
Page 59:
DAC- Distance Amplitude Correction
Page 62 and 63:
The following applet shows a test b
Page 64 and 65:
Developing a Distance Amplitude Cor
Page 66 and 67:
Back Wall Echo
Page 68 and 69:
2.) This example represents the use
Page 70 and 71:
4.) With no further adjustments to
Page 72 and 73:
Plotting DAC Curve
Page 74 and 75:
DAC Curve
Page 77 and 78:
Birring NDT Series, Ultrasonic Dist
Page 79 and 80:
4.2.2: Finding the probe index
Page 81 and 82:
Exit Point- A5 Block
Page 83 and 84:
5.2.3: Checking the probe angle
Page 85 and 86:
Probe Angles- A5 Block
Page 87 and 88:
Calibration of shear waves for rang
Page 89 and 90:
Echo from 100mm circular Section
Page 91 and 92:
Page 93 and 94:
50 mm radius from V2 Block
Page 95 and 96:
Page 97 and 98:
Exit Point /Range/Probe Angle calib
Page 99 and 100:
Dead Zone Determine the dead zone b
Page 101 and 102:
20 dB Profile Probe Beam Line of Sy
Page 103 and 104:
4.2.7: Transfer Correction Methods
Page 105 and 106:
Example: 0 degree Probe Calibration
Page 107 and 108:
Transfer and Attenuation Correction
Page 109 and 110:
4.2.8.1: Linearity of time base Gen
Page 115 and 116:
Ultrasonic Testing - Horizontal Lin
Page 117:
Tolerance Frequency of checking The
Page 122 and 123:
Figure 6 — General purpose set-up
Page 124:
Method A: 6.3.2.1 Apparatus—A tes
Page 127 and 128:
Q61: The vertical linear range of a
Page 129 and 130:
4.3: Curvature Correction Curvature
Page 131 and 132:
Concave surfaces work to focus the
Page 133 and 134:
Convex surfaces work to defocus the
Page 135 and 136:
Q: In transmitting sound energy int
Page 137 and 138:
The resulting model allows computat
Page 139 and 140:
Curvature Corrections
Page 141 and 142:
Curvature Correction
Page 143 and 144:
4.4: Calibration References & Stand
Page 145 and 146:
Reference Reflectors: are used as a
Page 147 and 148:
Reference Reflectors are used as a
Page 149 and 150:
Q80: The 50 mm diameter hole in an
Page 151 and 152:
4.6: Video Time http://v.pps.tv/pla
Page 153:
Birring NDT Series, Ultrasonic Test
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UT Testing-Section 4 Calibration Methods

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