GE Ultrasonic USM Go Operator's Manual

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Sensing & Inspection Technologies Ultrasonic

P/N 1259801 Rev. 1

July 2009

USM Go

Operator’s Manual

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GESensingInspection.com

Technical content subject to change without notice.

USM Go

Ultrasonic Flaw Detector

Operator’s Manual

P/N 1259801 Rev. 1 July 2009

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Contents

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Chapter 1. General Information

1.1 Supplying Power to the Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.2 Powering the Instrument ON and OFF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.3 Using the Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.3.1 Instrument Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.3.2 Keypad Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.3.3 Joystick Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.3.4 Multi-Key Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.4 Using the Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1.4.1 Accessing the Acquire Mode Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1.4.2 Accessing the Setup Mode Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.5 Using the SD Slot, USB Connector & I/O Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.5.1 Removing the SD Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1.5.2 Inserting the SD Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1.5.3 Connecting the USB Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1.5.4 Connecting the I/O Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

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Chapter 2. Instrument Setup

2.1 Display Screen and Keypad Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.2 The Menu System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.3 Initial Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2.3.1 Language, Units of Measurement, Date, and Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2.3.2 Display Appearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

2.3.3 Defining Function Toggle Actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

2.4 Installing a Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

2.4.1 Connecting the Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

2.4.2 Configuring the Instrument. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

2.4.3 Adjusting the Pulser Repetition Frequency (PRF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

2.4.4 Setting the Pulser Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

2.4.5 Selecting the Pulser Type (OPTIONAL). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

2.4.6 Selecting the Pulser Width (OPTIONAL). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

2.4.7 Using the Phantom PRF Feature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

2.4.8 Selecting a Rectification Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

2.4.9 Setting the A-Scan REJECT Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

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2.5 Adjusting the A-Scan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

2.5.1 Setting the A-Scan Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

2.5.2 Setting the Display Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

2.6 Calibrating the Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

2.6.1 Pre-Calibration Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

2.6.2 Using AUTOCAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

2.6.3 Checking the Calibration Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

2.7 Using the Calibration Reminder Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

2.8 Activating Instrument Upgrades. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Chapter 3. Making Measurements

3.1 Configuring Gate A and Gate B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

3.1.1 Positioning the Gates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

3.1.2 Selecting the TOF-Detection Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

3.1.3 Setting Gate Alarms and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

3.2 Using Angle Beam Probes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

3.2.1 Setting the Angle Beam Probe Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

3.2.2 Indicating Leg with Color . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

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3.3 Displaying Measured Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

3.4 Locking the Gain Toggle and the Joystick . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

3.5 Setting the Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

3.5.1 Changing the Gain-Adjustment Increment (dB STEP). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

3.5.2 Setting the User-Defined Gain Step (SETUP-GAIN-USER GAIN STEP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

3.6 Freezing the A-Scan Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

3.7 DAC/TCG Evaluation Mode (Optional). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

3.8 Using DAC Mode (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

3.8.1 Recording the DAC Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

3.9 Using TCG Mode (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

3.9.1 Generating the TCG Reference Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

3.9.2 Working with TCG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

3.10Adjusting DAC or TCG Display and Adding Offsets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

3.10.1 Defining DAC or TCG Curve Offsets (DAC/TCG-OFFSETS-MODE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

3.10.2 Setting Transfer Correction (DAC/TCG-MAT ATTN-TRANSFER CORR). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

3.11Editing and Deleting DAC and TCG Reference Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

3.12Deleting a DAC Curve or TCG Reference Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

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3.13DGS Evaluation Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

3.13.1 Specifying a Probe and Preparing to Record the Reference Echo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

3.13.2 Record the Reference Echo that Defines the DGS Curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

3.13.3 Display and Adjust the DGS Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

3.13.4 Evaluating Results in DGS Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

3.13.5 Locks and Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

3.13.6 Validity of the DGS Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

3.14dB REF Evaluation Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

3.15AWS D1.1 Weld Rating Evaluation Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

3.16JISDAC Evaluation Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

3.16.1 Recording the JISDAC Curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

3.16.2 Working with JISDAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

3.16.3 Deleting a JISDAC Curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Chapter 4. Data Sets & Reports

4.1 The FILES Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

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4.2 Working With Data Set Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

4.2.1 Storing a New Data Set File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

4.2.2 Recalling a Data Set File. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

4.2.3 Deleting a Data Set File. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

4.2.4 Editing a Data Set File. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

4.3 Creating a Memo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

4.4 Including a Memo in a Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

4.5 Creating a Report Header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

4.6 Including a Header in a Report. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

4.7 Creating a Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

4.8 Storing a Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

4.9 Fast Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

Chapter 5. Data Recorder Files

5.1 Naming the Data Recorder File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

5.1.1 File Selection Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

5.1.2 File Naming Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

5.2 Configuring the Data Recorder File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

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5.3 Creating the Data Recorder File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

5.4 Viewing the Data Recorder File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

5.5 Using the Data Recorder File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Appendix A. Specifications

A.1 LCD Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

A.2 Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

A.3 Pulser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

A.4 Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

A.5 Gates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

A.6 Memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

A.7 Environmental. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

A.8 Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

A.9 USM Go Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Appendix B. Environmental Compliance

B.1 Waste Electrical and Electronic Equipment (WEEE) Directive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

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B.2 Battery Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

B.2.1 What do the Markings Mean?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

B.2.2 The Risks and Your Role in Reducing Them . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

Appendix C. EN 12668 Specifications

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USM Go Operator’s Manual xi

Preface

Safety Information

Before powering up or operating this instrument, the safety information in this section should be read carefully. This Operator’s Manual should be stored in a safe place for reference.

IMPORTANT: This instrument is to be used only for testing materials in an industrial environment. Any use for medical applications or any

other purpose is not permitted.

IMPORTANT: This instrument is waterpr oof according to IP 67. It can be operated either with batteries or with the power supply unit. The

power supply unit meets the requirements of

Electrical Safety Class II.

Batteries

For battery operation of this instrument, GEIT only recommends the use of a lithium-ion battery. You should only use the battery recommended by GEIT for operation of this instrument. You can charge the lithium-ion battery either within the instrument itself or with the external battery charger.

IMPORTANT: See “Battery Disposal” on page 147 for instructions on proper battery disposal procedures.

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Preface

xii USM Go Operator’s Manual

Important Ultrasonic Testing Guidelines

Please read the information in this section before using your instrument. It is important that you understand and observe this information to avoid any operator errors that might lead to false test results. Such false results could result in personal injuries or property damage.

Using Ultrasonic Test Equipment

This Operator’s Manual contains essential information on how to operate your test equipment. In addition, there are a number of factors that affect the test results, but a description of all these factors is beyond the scope of this manual. The three most important factors for safe and reliable ultrasonic inspection are:

• Operator training

• Knowledge of special technical test requirements and limits

• Choice of appropriate test equipment

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USM Go Operator’s Manual xiii

Preface

Operator Training

The operation of an ultrasonic test device requires proper training in ultrasonic testing methods. Proper training comprises adequate knowledge of:

• The theory of sound propagation

• The effects of sound velocity in the test material

• The behavior of the sound waves at interfaces between different materials

• The shape of the sound beam

• The influence of sound attenuation in the test object and the influence of the surface quality of the test object

Lack of such knowledge could lead to false test results with unforeseeable consequences. You can contact GEIT or NDT societies or organizations in your country (DGZfP in Germany; ASNT in the USA) for inform ati on on opportunities for training on ultrasonic instruments that use time-of-flight measurements.

Accurate measurement results require a constant sound velocity in the test object. Steel test objects have only slight variations in sound velocity, thus affecting only high precision measurements. Test objects made of other materials (e.g., nonferrous metals or plastics) may have larger sound velocity variations, which could adversely affect the accuracy of the measurements.

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Test Object Material Effects

If the material of the test object is not homogeneous, the sound waves may propagate at different velocities in different parts of the test object. An average sound velocity should then be used for the range calibration. This is achieved by using a reference block with a sound velocity equal to the average sound velocity of the test object.

If substantial sound velocity variations are expected, then the instrument calibration should be adjusted to the actual sound velocity values at shorter time intervals. Failure to do so may lead to false readings.

Test Object Temperature Effects

The sound velocity also varies as a function of the temperature of the test object. This can cause appreciable errors in measurements if the instrument has been calibrated with a reference block at one temperature, and the instrument is then used on a test object at a different temperature. Such measurement errors can be avoided either by ensuring that the reference block and the test object are at the same temperature, or by using a correction factor obtained from published tables.

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USM Go Operator’s Manual xv

Preface

Limited Warranty

For a period of two (2) years from the date of purchase, we warrant that the instrument will be free of any claim of ownership by third parties, (ii) when new, be free from defects in material and workmanship and perform in accordance with the Product’s specifications under normal use and service for the applicable warranty period following the date of sale. The second year of this warranty is valid only if the instrument is calibrated to within t he provided specifications, by us or one of our certified service providers after month twelve of ownership but before month fourteen begins. The duration of the warranty may be extended or modified by explicit service contracts.

This limited warranty shall not apply to any problems arising from (i) failure to follow the product instructions or failure to perform preventive maintenance, (ii) service, repair or modification by someone other than us or one of our authorized service representatives; or (iii) external causes, such as accident, abuse, misuse, or problems with electrical power.

This warranty does not cover parts identified as wear-and-tear parts or lamps, transducers, tubes, accessories, or optional equipment not manufactured by us, which items may be covered by separate manufacturers’ warranties.

Our obligation under this warranty is limited to the repair or replacement of components determined by us to be defective within the warranty period at no cost to the original purchaser. Customer shall arrange for delivery to us in approved packing material. This warranty extends to the original purchaser and cannot be assigned or transferred to any other party.

EXCEPT FOR THE WARRANTY SET ABOVE, WE EXPRESSLY DISCLAIM ALL WARRANTIES AND REPRESENTATIONS OF ANY KIND WITH RESPECT TO OUR PRODUCTS, WHETHER EXPRESS OR IMPLIED, INCLUDING ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT, TITLE AND ANY WARRANTIES ARISING FROM COURSE OF PERFORMANCE, COURSE OF DEALING OR TRADE USAGE.

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Chapter 1. General Information

USM Go Operator’s Manual 1

Chapter 1. General Information

The USM Go is a portable ultrasonic flaw detector. In addition to its light-weight design, the USM Go includes a clean and simple user interface and a large, easy-to-read color WVGA (800x480) display. When operating in Acquire Mode, the instrument provides ultrasonic flaw detection and thickness measurements. In this mode, it is capable of storing A-Scans, operating parameters, and reports. Prior to using the Acquire Mode, the instrument display and operating parameters must be configured by using the Setup Mode. The following specific topics are discussed in this chapter:

• Supplying power to the instrument

• Powering the instrument ON and OFF

• Using the keypad

• Using the display

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Chapter 1. General Information

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1.1 Supplying Power to the Instrument

Figure 1: Rear and Side Views of the USM Go Case

Accessory Mounting Screw

Battery Charger

Connection

1/4-Turn Screw (CW to close, CCW to open)

Slot

Receive Probe

Power ON/OFF

1/4-Turn Screw (CW to close, CCW to open)

Pulse/Transmit Probe

Connection

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Chapter 1. General Information

USM Go Operator’s Manual 3

1.1 Supplying Power to the Instrument (cont.)

The USM Go can be powered in either of two ways (see Figure 1 on page 2):

• A lithium battery pack that is installed in a compartment on the rear of the case, or

• An external power adapter plugged into the connector on the side of the case

CAUTION! Use only the GEIT Lithium battery pack in this instrument, and charge only this battery pack in the instrument or in

the provided GEIT charger/adapter.

To remove the battery compartment cover, loosen the two 1/4-turn screws and then lift up on the slot between the screws. The standard GEIT Lithium battery pack is designed to provide maximum operating life between chargings.

The approximate level of remaining battery life is shown on the display (see Figure 2 on page 5) by the battery icon, , and the approximate “hours of charge” indication below the icon. When a fully-char ged battery pack is installed, the icon will appear as “full,” and the icon will begin to “empty” as the battery life is depleted. When the battery indicator is down to one-quarter full, charge the battery pack as soon as possible.

Note: The instrument automatically shuts OFF when the batteries are too weak for reliable operation. However, your settings are saved

and then restored when the instrument is turned back ON. When testing in remote locations, always carry a spare battery pack.

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Chapter 1. General Information

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1.1 Supplying Power to the Instrument (cont.)

When the AC adapter is connected to the instrument, the icon in the upper right corner of the display indicates the percentage of full-charge of the battery pack. When removing the battery pack to install a charged spare, the instrument will auto matically turn OFF if the AC adapter is not connected to the instrument. However, if the adapter is connected, the instrument will remain ON while you change battery packs.

1.2 Powering the Instrument ON and OFF

To power the USM Go ON or OFF, simply press the power button, , on the side of the case (see Figure 1 on page 2). As soon as the button press is recognized, you will hear the click of an internal relay. Then, after about 4 seconds, the display controller will be fully loaded and the display will become visible.

1.3 Using the Keypad

The USM Go is designed to provide the user quick access to all of the instrument's functions. Its easy-to-use menu system allows any function to be accessed with a minimum of effort. The functions typically used to collect ultrasonic data are located in the Acquire Mode menu, while those used to configure the instrument are found in the Setup Mode menu.

See Figure 2 on page 5 for the locations of the front-panel components described in this chapter.

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Chapter 1. General Information

USM Go Operator’s Manual 5

1.3 Using the Keypad (cont.)

Figure 2: Front Panel of the USM Go

Gain Toggle

Display Screen

Joystick

Battery Indicator

Function Toggle

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Chapter 1. General Information

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1.3.1 Instrument Orientation

One of the innovative features of the USM Go is the user option to quickly and easily rotate the instrument 180° to accommodate either right-hand or left-hand operation. During this process, the display image is also rotated to allow proper viewing. Figure 3 below shows the instrument in both orientations.

Figure 3: USM Go in Left-Hand and Right-Hand Orientations

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Chapter 1. General Information

USM Go Operator’s Manual 7

1.3.2 Keypad Components

The USM Go keypad includes the following items (see Figure 2 on page 5):

• Center-press joystick ( ): The joystick may be moved either “left or right” or “up or down.” In addition, the center of the joystick

may either be “pressed” or “pressed and held.”

• Gain toggle ( ): The two ends of the gain toggle act as separate buttons. One end is the “Gain DOWN” button, while the other end is

the “Gain UP” button. Either end of the gain toggle can either be “pressed” or “pressed and held.”

• Function toggle ( ): The two ends of the function toggle act as separate buttons. One end is the “Function 1” button, while the other

end is the “Function 2” button. Either end of the function toggle can either be “pressed” or “pressed and held.”

Note: The gain toggle is always at the top of the instrument, and the end of the function toggle closer to the display is always the

“Function 1” button, regardless of the chosen instrument orientation.

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Chapter 1. General Information

8 USM Go Operator’s Manual

1.3.3 Joystick Functions

The effects of the joystick actions described on th e prev ious page are as follows:

Joystick Center Press:

• When in Acquire Mode, a single press and release ( ) toggles the A-Scan display between standard size and full screen mode.

• When in Setup Mode, a single press and release ( ) activates or deactivates a parameter for adjustment.

• When in Acquire or Setup Mode, a 2-second press-and-hold ( ) switches to the other mode.

Joystick Movement:

• When in Acquire or Setup Mode, moving up/down ( ) scrolls between the available function options for the highlighted menu.

• When in Acquire or Setup Mode, moving left/right ( ) highlights a menu option or adjusts the value of a selected parameter.

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Chapter 1. General Information

USM Go Operator’s Manual 9

1.3.4 Multi-Key Functions

Note: All multi-key functions are defined with the instrument in the left-hand orientation (see the left side of Figure 3 on page 6).

• Power button + Function 2 button + Gain DOWN button

Pressing and holding these three buttons simultaneously causes the instrument to initiate a software upgrade.

Note: A formatted SD card with a valid USM Go upgrade file in the root directory must be inserted prior to pressing these buttons.

• Power button + Function 2 button + Gain UP button

Pressing and holding these three buttons simultaneously causes the instrument to ignore the last known setup and revert to the factory default settings.

Important: The last known setup will be overwritten and lost during this process.

• Gain UP button + Gain DOWN button

Pressing and holding the two Gain Toggle buttons simultaneously activates the AUTO80 function for the current Evaluation Mode.

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Chapter 1. General Information

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1.4 Using the Display

Typical displays for the USM Go Acquire Mode and Setup Mode menus are illustrated in Figure 4 below. See the following pages for step-by-step instructions on accessing these menus.

Figure 4: Acquire Mode (Left) and Setup Mode (Right) Displays

Battery Indicator

Gain Window

Gate Results

Menu Bar

Parameters

Grid Menu Bar

Parameters

Menu Title

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Chapter 1. General Information

USM Go Operator’s Manual 11

1.4.1 Accessing the Acquire Mode Menu

To access the Acquire Mode menu, refer to the left side of Figure 4 on page 10 while completing the fo llowing steps:

1. Move the joystick left or right ( ) until the desired menu is highlighted on the menu bar. The function bar automatically shows the

parameters available in the highlighted menu.

2. Move the joystick up or down ( ) to highlight the desired parameter.

3. While the desired parameter is highlighted, change its value by moving the joystick to the left or right ( ) or by pressing either end

of the function toggle ( ). For parameters with continuous values, the function toggle acts as a course adjustment, while the joystick acts as a fine adjustment. For selecting a parameter value from a list, either the joystick or the function toggle may be used to step through the list one item at a time.

Note: Pressing both ends of the function toggle simultaneously resets a highlighted parameter to its default value.

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Chapter 1. General Information

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1.4.2 Accessing the Setup Mode Menu

To access the Setup Mode menu, refer to the right side of Figure 4 on page 10 while completing the following steps:

1. Press and hold the center of the joystick ( ) to toggle between Acquire Mode and Setup Mode.

2. Move the joystick left or right ( ) until the desired menu is highlighted on the menu bar. The function bar automatically shows the

parameters available in the highlighted menu.

3. Move the joystick as required ( ) to highlight the desired parameter.

4. Press the center of the joystick ( ) to activate the highlighted parameter. The parameter value can now be changed either by moving

the joystick ( ) as a fine adjustment or by pressing either end of the function toggle ( ) as a coarse adjustment. Press the center

of the joystick ( ) again to deactivate the highlighted parameter.

Note: Step 4 above applies to the setting of all parameters, except for specifying the actions associated with the function toggle keys. For

instructions on configuring these keys, see “Defining Function Toggle Actions” on page 35.

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Chapter 1. General Information

USM Go Operator’s Manual 13

1.5 Using the SD Slot, USB Connector & I/O Connector

The USM Go uses a standard SD memory card for storing data set files and reports (see “The FILES Menu” on page 114) and for loading an instrument software upgrade (see “Activating Instrument Upgrades” on page 60). The SD card slot is located in a compartment on the top of the instrument, along with a USB connector and an I/O connector (see Figure 5 below).

Figure 5: Top View of USM Go Case

USB Connector

Hinged Cover

SD Card Slot

I/O Connector

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Chapter 1. General Information

14 USM Go Operator’s Manual

1.5.1 Removing the SD Card

To remove the SD card from its slot, proceed as follows:

1. Access the SD card slot by pushing on the cover in the direction of the arrow and lifting the hinged cover.

2. Press down of the SD card with your finger and then remove your finger quickly. The SD card will be partially ejected, and you can

then grasp it by the edge and slide it completely out of the slot.

1.5.2 Inserting the SD Card

To insert the SD card into its slot, proceed as follows:

CAUTION! Do not force the SD card into the slot if you feel significant resistance. If the card does not enter the slot freely, it is

probably oriented incorrectly.

1. Access the SD card slot by pushing on the cover in the direction of the arrow and lifting the hinged cover.

2. Orient the SD card so that the label side faces the rear of the instrument and the blank side with the row of gold-colored electrical

contacts faces the display side of the instrument. The edge of the card with the row of gold-colored electrical contacts must enter the slot first.

3. Slide the card fully into the slot and push gently until the card seats into its socket. Then, close the SD card slot cover.

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Chapter 1. General Information

USM Go Operator’s Manual 15

1.5.3 Connecting the USB Port

The connector closest to the hinge of the top compartment cover (see Figure 5 on page 13) is a Micro USB port. If you use a standard USB cable to connect the USM Go to a PC (no special drivers are required), the installed SD card will be added to the list of active drives on the PC. You can then perform all normal drive activities, such as copying and deleting files, on the USM Go SD card.

Important: While the USM Go is connected to a PC via the USB port, the instrument will not accept any user input from the keypad.

Normal operation resumes as soon as the USB cable is disconnected.

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Chapter 1. General Information

16 USM Go Operator’s Manual

1.5.4 Connecting the I/O Port

The connector furthest from the hinge of the top compartment cover (see Figure 5 on page 13) is an I/O port. This port serves a dual role:

• Serial port pins - these are used strictly for factory service diagnostics.

• Sync & Alarm pins - these signals are accessible to the user via a special optional cable.

To use this connector you must order the optional USM Go cable, which is available as P/N 022-510-032. The pin designations for connecting the open end of this cable are listed in Table 1 below:

Table 1: I/O Connector Pin Assignments

Pin # Color Signal

1Brown+5V 2RedSAP 3 Orange Alarm 4 Yellow RS232 CTS 5 Green RS232 TX 6 Blue RS232 RX 7 Purple GND

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Chapter 2. Instrument Setup

USM Go Operator’s Manual 17

Chapter 2. Instrument Setup

2.1 Display Screen and Keypad Features

The USM Go user interface has been designed for clarity and ease of use. Figure 6 below show the complete set of icons that may appear in the icon area of the screen, and Figure 7 on page 18 shows the major components of the display and the keypad.

Figure 6: Display Screen Icons

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Chapter 2. Instrument Setup

18 USM Go Operator’s Manual

2.1 Display Screen Features (cont.)

Figure 7: Display Screen Features

Battery Level

Large Reading

Reading 6

Reading 5

ACQUIRE Menu Bar

Reading 4

Reading 3

Reading 2Reading 1

Gain Toggle

Function Toggle

Gain Level

Function 1

Function 2

Joystick

Icon Area

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Chapter 2. Instrument Setup

USM Go Operator’s Manual 19

2.2 The Menu System

The USM Go menu system, as shown in Figure 8 on page 20, allows the operator to select and adjust various instru m e nt features and settings. It includes:

• Acquire Menu: Consists of several submenus used to calibrate the instrument prior to a test, configure the instrument during a test,

select the pulser and receiver characteristics, and configure the gates.

• SETUP Menu: Consists of several submenus used to configure the instrument prior to a test, including specifying the acquire mode and

the screen appearance, adjusting the A-Scan display, setting the alarms, and controlling other significant measurement parameters.

The information provided in this chapter describes each menu function and shows how to access each function through the menu system. The EVALuation MODE Function, which is located in the EVAL submenu of the SETUP menu, determines which submenu for evaluating

results appears in the Acquire and SETUP menus (see the shaded cells in Figure 8 on page 20). See Figure 9 on page 21 for the available Evaluation Mode options.

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Chapter 2. Instrument Setup

20 USM Go Operator’s Manual

2.2 The Menu System (cont.)

Figure 8: Acquire and Setup Menus

header edit memo edit memo in report hdr in report

image in report param in report

MEMO/HDR

EPORT

eval mode color leg magnify gate

probe angle thickness x value O-diameter*

reading 1 reading 2

VALM

RESULTS

serial number code confirm

language units decimal date format

date time

REG

ONAL

STARTUP

function 1 function 2 about

gate a logic gate b logic b start mode output select

cal reminder cal reset

SETUP

TEM

SETUP2

SETUP

DAC/TCG DGS dBREF AWS D1.1 JISDAC

DIS

LAY

ULSER

reading 3 reading 4

mode reading 5 reading 6 large

orientation

user gain step dB step

color grid

pulser type prf mode

ascan color brightness

phantom prf

SETUP MENU

FILES

EVAL

CONFIG1

CONFIG2

Depends on

OPTIONAL

Evaluation Mode

Configuration

range probe delay velocity

voltage width damping prf mode

frequency rectify

PULSER

EIV

ACQUIRE MENU

gate a start s-ref1 s-ref2

gate a start gate a width a threshold tof mode

gate b start gate b width

AUTOCAL

SELECTED

EVALUATION

MODE

display delay

dual reject record

b threshold tof mode

ascan fill

Press and hold to switch between menus

filename action

FIL

NAME

filename create DR view

top bottom ADV direction

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Chapter 2. Instrument Setup

USM Go Operator’s Manual 21

2.2 The Menu System (cont.)

Figure 9: Available Evaluation Mode Menus

gate A start auto80 record finish

mode reference

gate A start gate A width A threshold

probe name xtal frequency eff diameter delay velocity

gate A start gate A width

GATE

DGS PROB

TE A

point point pos point gain

ref atten ampl correct

delete ref

transfer corr test attn

transfer corr

MAT ATTN

OFFSETS

E A

A threshold tof mode

gate A start gate A width A threshold tof mode

EVALUATION MODE MENUS AVAILABLE

dgs mode dgs curve

tcg/dac mode tcg display dac type

gate A start reference type ref size record ref

TUP

F ECHO

delete curve

offset 1 offset 2 offset 3

gate A start gate A width A threshold tof mode

FSE

E A

offset 4

GATE

MAT ATTN

gate A start gate A width A threshold tof mode

transfer corr

JISDAC

JISDAC bold line

mode offset

offset 1 offset 2 offset 3 offset 4

gate A start auto80 record finish

A indication B reference C attenuation D D1.1 rating

AWS D1.1

dB REF

DGSDAC/TCG

Use the EVAL MODE function

to make one of these

five menus active.

RECORD

tof mode

enter

probe # probe name

record delete ref

delete curve

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2.3 Initial Setup

In this section, you’ll learn how to configure the USM Go display and operating features. Follow these procedures to turn the instrument ON and make initial adjustments to the control settings. Because the instrument can be set to save the control settings when it is turned OFF and restore them when it is turned back ON, you won’t have to repeat these adjustments unless a change is required.

Power the instrument ON and note that the ACQUIRE menu is automatically activated. Activate the SETUP menu by pressing in and

holding the center of the joystick ( ).

Note: The entire menu structure is shown in Figure 8 on page 20 and Figure 9 on page 21.

2.3.1 Language, Units of Measurement, Date, and Time

Use the procedures in this section to adjust the units of measurement, the date, the time, and the language that appears on the display screen and the data output. The adjustments require access to the REGIONAL and STARTUP function groups. These are accessed from the CONFIG1 submenu in the SETUP menu, as shown in Figure 10 on page 23.

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2.3.1 Language, Units of Measurement, Date, and Time (cont .)

Figure 10: ACQUIRE Menu (Left) and CONFIG1 Menu (Right)

RANGE

PROBE DELAY

VELOCITY

DISPLAY DELAY

ACQUIRE MENU

VOLTAGE

DAMPING

PRF MODE

FREQUENCY

RECTIFY

DUAL

REJECT

LANGUAGE

UNITS

DECIMAL

DATE FORMAT

CONFIG1 MENU

DATE

TIME

ORIENTATION

COLOR

GRID

A-SCAN COLOR

BRIGHTNESS

PULSERRANGE RECEIVER STARTUPREGIONAL DISPLAY

-h

-S

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2.3.1a Setting the Acquire Mode Language (SETUP-CONFIG1-LANGUAGE)

1. In the SETUP menu, activate the CONFIG1 submenu using the joystick ( ). Several functions are displayed on the screen.

2. Use the joystick ( ) to select the LANGUAGE function, then press the center of the joystick ( ) to activate the function. To

change the selected language, either move the joystick or press the function toggle. You’ll note that the options available are English, German, French, Spanish, Italian, Romanian, Polish, Czech, Russian, Japanese and Chinese. The default language is English.

3. Press the center of the joystick ( ) to deactivate the function when complete. The display screen and report language are now set to

the choice last selected.

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2.3.1b Setting the Units of Measurement (SETUP-CONFIG1-UNITS)

1. In the SETUP menu, activate the CONFIG1 submenu using the joystick ( ). Several functions are displayed on the screen.

2. Use the joystick ( ) to select the function titled UNITS, then press the center of the joystick ( ) to activate the function. The

following options are available:

• mm - default setting which displays values in millimeters

• INCH - displays values in inches

3. To change the units of measurement, either move the joystick or press the function toggle.

4. After making your choice, press the center of the joystick ( ) to deactivate the function.

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2.3.1c Setting the Decimal Convention (SETUP-CONFIG1-DEC IMAL)

1. In the SETUP menu, activate the CONFIG1 submenu using the joystick ( ). Several functions are displayed on the screen.

2. Use the joystick ( ) to select the function titled DECIMAL, then press the center of the joystick ( ) to activate the function.

The following options are available:

• PERIOD - uses a period as a decimal point

• COMMA - uses a comma as a decimal point

3. To change the decimal convention, either move the joystick or press the function toggle.

4. After making your choice, press the center of the joystick ( ) to deactivate the function.

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2.3.1d Setting the Date and Time Formats (SETUP-CONFIG1-DATE FORMAT)

1. In the SETUP menu, activate the CONFIG1 submenu using the joystick ( ). Several functions are displayed on the screen.

2. Use the joystick ( ) to select the function titled DATE FORMAT, then press the center of the joystick ( ) to activate the

function.

3. To change the selected date and time format, either move the joystick or press the function toggle. Choose from the following date and

time formats:

• Y-M-D date format and 12 or 24 hour time format

• M/D/Y date format and 12 or 24 hour time format

• D.M.Y date format and 12 or 24 hour time format

4. After making your choice, press the center of the joystick ( ) to deactivate the function. The date and time format shown on the

display screen and in the out reports are now set to the choice last selected.

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2.3.1e Setting the Date (SETUP-CONFIG1-DATE)

1. In the SETUP menu, activate the CONFIG1 submenu using the joystick ( ). Several functions are displayed on the screen.

2. Use the joystick ( ) to select the function titled DATE, then press the center of the joystick ( ) to activate the function. Note

that the first character is highlighted.

3. Move the joystick up or down ( ) to change the highlighted character. Then, move the joystick left or right ( ) to select the

other characters to be modified.

4. After making your choice, press the center of the joystick ( ) to deactivate the function.

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2.3.1f Setting the Time (SETUP-CONFIG1-TIME)

1. In the SETUP menu, activate the CONFIG1 submenu using the joystick ( ). Several functions are displayed on the screen.

2. Use the joystick ( ) to select the function titled TIME, then press the center of the joystick ( ) to activate the function. Note

that the first character is highlighted.

3. Move the joystick up or down ( ) to change the highlighted character. Then, move the joystick left or right ( ) to select the

other characters to be modified.

4. After setting the correct time, press the center of the joystick ( ) to deactivate the function.

Note: Once set, the internal clock maintains the current date and time.

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2.3.1g Setting Left-Hand or Right-Hand Orientation (SETUP-CONFIG1-ORIENTATION)

1. In the SETUP menu, activate the CONFIG1 submenu using the joystick ( ). Several functions are displayed on the screen.

2. Use the joystick ( ) to select the function titled ORIENTATION, then press the center of the joystick ( ) to activate the

function. Select either RIGHT hand or LEFT hand control.

3. To change the display screen orientation, either move the joystick or press the function toggle.

4. After making your choice, press the center of the joystick ( ) to deactivate the function.

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2.3.2 Display Appearance

Follow the procedures in this section to adjust the display appearance. The adjustments require access to the CONFIG1 submenu, which is accessed from the SETUP menu (see Figure 10 on page 23).

2.3.2a Setting the Display Color (SETUP-CONFIG1-COLOR)

1. In the SETUP menu, activate the CONFIG1 submenu using the joystick ( ). Several functions are displayed on the screen.

2. Use the joystick ( ) to select the function titled COLOR, then press the center of the joystick ( ) to activate the function.

There are four preset color schemes.

3. To change the display color scheme, either move the joystick or press the function toggle.

4. After making your choice, press the center of the joystick ( ) to deactivate the function.

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2.3.2b Selecting a Display Grid (SETUP-CONFIG1-GRID)

1. In the SETUP menu, activate the CONFIG1 submenu using the joystick ( ). Several functions are displayed on the screen.

2. Use the joystick ( ) to select the function titled GRID, then press the center of the joystick ( ) to activate the function.

3. To change the display grid type, either move the joystick or press the function toggle. The selected grid style will be shown in the

A-Scan window on the display screen, after you return to Acquire Mode.

4. After making your choice, press the center of the joystick ( ) to deactivate the function.

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2.3.2c Setting the A-Scan Color (SETUP-CONFIG1-ASCAN COLOR)

1. In the SETUP menu, activate the CONFIG1 submenu using the joystick ( ). Several functions are displayed on the screen.

2. Use the joystick ( ) to select the function titled ASCAN COLOR, then press the center of the joystick ( ) to activate the

function. There are six A-Scan color options.

3. To change the A-Scan color, either move the joystick or press the function toggle.

4. After making your choice, press the center of the joystick ( ) to deactivate the function.

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2.3.2d Setting the Display Brightness (SETUP-CONFIG1-BRIGHTNES)

1. In the SETUP menu, activate the CONFIG1 submenu using the joystick ( ). Several functions are displayed on the screen.

2. Use the joystick ( ) to select the function titled BRIGHTNESS, then press the center of the joystick ( ) to activate the

function. The available settings range from 1 to 10.

3. To change the brightness level, either move the joystick or press the function toggle.

4. After making your choice, press the center of the joystick ( ) to deactivate the function.

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2.3.3 Defining Function Toggle Actions

The user can specify a desired action to occur when either end of the Function Toggle ( ) is pressed or pressed-and-held. The user-specified function action is ignored, however, whenever a parameter is selected and its value is being edited.

1. In the SETUP menu, activate the CONFIG2 submenu using the joystick ( ). Several functions are displayed on the screen.

2. Use the joystick ( ) to select either the function titled FUNCTION1, for the end of the toggle closer to the display screen, or the

function titled FUNCTION2, for the end of the toggle further from the display screen. Then, press the center of the joystick ( ) to activate the function.

Note: There are two values for each function. The upper parameter determines the action taken when then corresponding toggle end is

momentarily pressed. The lower parameter defines the action taken when the toggle end is pressed and held.

3. To change the upper parameter, move the joystick left or right ( ).

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2.3.3 Defining Function Toggle Actions (cont.)

4. To change the lower parameter, press the function toggle to scroll through the options. The available options include:

• NONE – no action is assigned.

• FREEZE – Freezes the A-Scan and displays the Freeze icon (see Figure 6 on page 17) in the status bar.

• JOYSTICK LOCK – Prevents up-down and left-right adjustments using the joystick ( ) and displays the Lock icon (see Figure 6

on page 17) on the display screen. However, center-press operations with the joystick are not disabled.

• COPY – Performs the task specified by the ACTION function, which is located in the FILE submenu.

• AUTO80 – Adjusts the gain to place the Gate A triggering echo peak at 80% of full-screen height.

• MAGNIFY GATE – Zoom the A-Scan so that the displayed screen width matches the user-specified gate width.

• HOME – Selects the RANGE (i.e. HOME) menu in Evaluation Mode.

5. After making your choice, press the center of the joystick ( ) to deactivate the function.

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2.4 Installing a Probe

Follow the instructions in this section to install a probe on your USM Go.

2.4.1 Connecting the Probe

When connecting a probe to the instrument, the following steps must be taken:

• Properly complete the physical connection of the probe to the instrument.

• Properly configure the instrument to work with the connected probe.

The USM Go accepts either a single-element probe or a dual-element probe.

T o install a single-element probe, connect the probe cable to either of the two ports on the side of the instrument (see Figure 11 to the right). When a dual-element probe is connected to the instrument, the key between and below the ports ensures proper orientation of the transmit and receive connectors.

Figure 11: Probe Connector Locations

Receive

Probe

Transmit

Probe

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2.4.2 Configuring the Instrument

Three instrument settings are directly dependent on the type of probe installed. These settings must be adjusted any time a probe of a different type is installed, by following the instructions in the following sections.

2.4.2a Selecting the Probe Type (RECEIVER-DUAL)

1. In the ACQUIRE menu, activate the RECEIVER submenu using the joyst ick ( ).

2. Use the joystick ( ) to select the function titled DUAL.

3. To change the probe type, move the joystick ( ) or press the function toggle. Each available probe type is represented by an icon in

the Icon Bar, near the upper left corner of the display, whenever that probe type is highlighted. The following options are available:

• ON - Use for dual-element probes. If this option is selected, the Dual icon (see Figure 6 on page 17) is displayed.

• OFF - Use for single-element probes. If this option is selected, the Single icon (see Figure 6 on page 17) is displayed.

4. After completing your selection, move the joystick up or down ( ) to navigate away from this function.

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2.4.2b Specifying the Probe Frequency (RECEIVER-FREQUENCY)

1. In the ACQUIRE menu, activate the RECEIVER submenu using the joyst ick ( ).

2. Use the joystick ( ) to select the function titled FREQUENCY.

3. To change the specified frequency, move the joystick ( ) or press the function toggle. The following options are available:

• Low Pass, 4, 5, 10, 13 MHz - Choose the frequency that matches the frequency of your probe.

• BROADBAND - Select this option to use the built-in broadband filter.

4. After completing your selection, move the joystick up or down ( ) to navigate away from this function.

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2.4.2c Changing Damping Level to modify the Signal to Noise Ratio (PULSER-DAMPING)

1. In the ACQUIRE menu, activate the PULSER submenu using the joystick ( ).

2. Use the joystick ( ) to select the function titled DAMPING.

3. To change the specified damping level and optimize the A-Scan signal appearance, move the joystick ( ) or press the function

toggle. The following options are available:

• 50 

• 1000 

4. After completing your selection, move the joystick up or down ( ) to navigate away from this function.

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2.4.3 Adjusting the Pulser Repetition Frequency (PRF)

The Pulser fires at a frequency which can be set either automatically or manually. To set the PRF mode and frequ ency level:

1. In the ACQUIRE menu, activate the PULSER submenu using the joystick ( ).

2. Use the joystick ( ) to select the function titled PRF MODE.

3. Press the function toggle to see the three available options:

• AUTO HIGH - The instrument calculates and sets the pulser firing rate at 75% of the maximum frequency possible, based on the

range and the material velocity.

• AUTO MED - The instrument calculates and sets the pulser firing rate at 50% of the maximum frequency possible, based on the range

and the material velocity.

• AUTO LOW - The instrument calculates and sets the pulser firing rate at 20% of the maximum frequency possible, based on the range

and the material velocity.

• MANUAL - Allows the user to set the pulser frequency. However, unacceptable PRF settings will cause a display prompt to appear.

Note: The MANUAL option is available only if the CUSTOM PRF option is enabled.

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2.4.3 Adjusting the Pulser Repetition Frequency (PRF) (cont.)

4. If PRF MODE is set to AUTO HIGH, AUTO MED or AUTO LOW, the automatically calculated value is displayed in the function box. If you selected the MANUAL option, you may now adjust the PRF value by moving the joystick left or right ( ).

Note: The PRF setting may be limited based on the user-selected pulser voltage setting. This feature acts to limit signal dissipation.

2.4.4 Setting the Pulser Voltage

The relative energy with which the pulser fires is adjusted by changing the VOLTAGE setting. To set the pulser voltage level:

1. In the ACQUIRE menu, activate the PULSER submenu using the joystick ( ).

2. Use the joystick ( ) to select the function titled VOLTAGE. Press the function toggle or move the joystick ( ) to:

• Set the voltage level to HIGH or LOW, for a standard PULSER TYPE setting of SPIKE, or

• Specify the actual VOLTAGE value, for an optional PULSER TYPE setting of SQUARE

3. After completing your selection, move the joystick up or down ( ) to navigate away from this function.

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2.4.5 Selecting the Pulser Type (OPTIONAL)

The standard pulser shape is a spike, and there is also an optional square pulser shape available. If the PULSER TYPE option is activated, choose between the spike and square options as follows:

1. In the SETUP menu, activate the CONFIG2 submenu using the joystick ( ).

2. Use the joystick ( ) to select the function titled PULSER TYPE. Then, press the center of the joystick ( ) to activate the

function.

3. Press the function toggle or move the joystick ( ) to select SPIKE or SQUARE. Then, press the center of the joystick ( ) to activate the function.

Note: This selection influences the VOLTAGE settings available and the availabi lit y of a PULSER WIDTH function, which is only

available when a SQUARE wave is specified.

4. After making your choice, press the center of the joystick ( ) to deactivate the function.

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2.4.6 Selecting the Pulser Width (OPTIONAL)

The standard pulser shape is a spike, and there is also an optional square pulser shape available. If the PULSER TYPE option is activated and a SQUARE wave is chosen, the user may specify the time-based width of the pulser. The pulser width generally varies from 30 to 500 nanoseconds. The pulse width value is expressed as half of the bipolar square wave pulse width. A recommended starting point from which the width setting can be adjusted is found with the following equation:

For example, if a 2 MHz probe is used, the equation becomes:

PULSE WIDTH (nanoseconds)

1000

----------- -

with f in MHz=

PULSE WIDTH (nanoseconds)

1000 22

----------- -250==

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2.4.6 Selecting the Pulser Width (OPTIONAL) (cont.)

To set a pulser width:

1. In the ACQUIRE menu, activate the PULSER submenu using the joystick ( ).

2. Use the joystick ( ) to select the function titled WIDTH, which is only available if the PULSER TYPE function is set to square.

Press the function toggle or move the joystick ( ) to set the width of the pulser.

3. After completing your selection, move the joystick up or down ( ) to navigate away from this function.

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2.4.7 Using the Phantom PRF Feature

When activated, this diagnostic feature varies the PRF to identify any wrap-around signals, which are phantom echoes caused by a PRF setting that is too high. When this feature is activated, the time-based position of the phantom echoes varies while the true echoes remain stationary on the display screen.

1. In the SETUP menu, activate the CONFIG2 submenu using the joystick ( ).

2. Use the joystick ( ) to select the function titled PHANTOM PRF. Press the joystick ( ) to activate this function.

3. Press the function toggle or move the joystick ( ) to choose either ON or OFF.

4. After making your choice, press the center of the joystick ( ) to deactivate the function.

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2.4.8 Selecting a Rectification Mode

Rectification effects the orientation of the A-scan on the display screen. The A-scan represents the sound pulse (i.e. echo) that is returned to the instrument from the material being tested. The series of echoes looks like the Radio Frequency (RF) signal shown in Figure 12 below. Note that the RF signal has both a negative component below the axis and a positive component above the axis. In RF mode, Gate A and Gate B can be positioned either above or below the axis, to be triggered by either a positive-heading echo or a negative-heading echo.

Figure 12: Typical RF and Rectified Signals

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2.4.8 Selecting a Rectification Mode (cont.)

• Positive Half Rectification means that only the upper (i.e. positive) half of the RF signal is displayed.

• Negative Half Rectification means that only the bottom (i.e. negative) half of the RF signal is displayed (see Figure 12 on page 47). Note

that although only the negative half of the RF signal is displayed, it is shown in the same orientation as a positive component to simplify viewing.

• Full-Wave Rectification combines the positive- and negative-rectified signals together, and displays both of them in a positive

orientation (see Figure 12 on page 47).

Use the procedure on the next page to select a rectification mode.

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2.4.8 Selecting a Rectification Mode (cont.)

1. In the ACQUIRE menu, activate the RECEIVER submenu using the joyst ick ( ).

2. Use the joystick ( ) to select the function titled RECTIFY. The following options are available:

• NEG HALFWAVE - Shows the negative component of the RF signal but displays it in a positive orientation.

• POS HALFWAVE - Shows the positive component of the RF signal.

• FULLWAVE - Shows the positive and negative halves of the RF wave, but both are oriented in the positive direction.

• RF - Shows the echo with no rectification.

3. Press the function toggle or move the joystick ( ) to select the desired rectification method.

4. After completing your selection, move the joystick up or down ( ) to navigate away from this function.

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2.4.9 Setting the A-Scan REJECT Level

A portion of the A-Scan can be omitted from the display screen, by defining the percentage of the full-screen height you wish to omit. To set a reject percentage:

1. In the ACQUIRE menu, activate the RECEIVER submenu using the joyst ick ( ).

2. Use the joystick ( ) to select the function titled REJECT.

3. To change the amount of the A-Scan you wish to omit from the display, as a percentage of the full-screen height, either move the

joystick ( ) or press the function toggle. Yo u may om it a portion of the A-Scan up to 80% of the full-screen height.

Note: Whenever REJECT is set to a value greater then 0%, the reject icon (see Figure 6 on page 17) is displayed in the status bar.

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2.5 Adjusting the A-Scan

To configure the USM Go A-Scan, follow the instructions in this section.

2.5.1 Setting the A-Scan Range

Calibration of the USM Go requires the use of two calibrated standards. These standards must be of different thicknesses, and they must be made of the same material as the test piece. Prior to calibrating the instrument/probe combination, the the A-Scan display range, which is the material thickness value represented by the full horizontal width of the screen, is normally set to a value equal to or slightly larger than the thicker calibrated standard (see Figure 13 below).

Figure 13: Effects of the A-Scan Range Adjustment

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2.5.1 Setting the A-Scan Range (cont.)

To set the A-Scan range:

1. In the ACQUIRE menu, activate the RANGE submenu using the joystick ( ).

2. Use the joystick ( ) to select the function titled RANGE, which has both coarse and fine adjustment modes. Coarse adjustments

are made with the function toggle, while fine adjustments are made with the joystick. When “RANGE” appears in all capital letters, coarse adjustments are being made, while fine adjustments occur when “range” appears in all lower-case letters.

3. Press the function toggle or move the joystick ( ) to change the range setting. Values from 0.040 to 1100 in. are allowed.

Note: Pressing both buttons on the Function Toggle simultaneously resets the RANGE to the default value of 10.000 in.

4. After completing your selection, move the joystick up or down ( ) to navigate away from this function.

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2.5.2 Setting the Display Delay

The display delay function shifts the displayed A-Scan to the left or the right in the viewing window. To set the display delay:

1. In the ACQUIRE menu, activate the RANGE submenu using the joystick ( ).

2. Use the joystick ( ) to select the function titled DISPLAY DELAY.

3. Press the function toggle or move the joystick ( ) to change the display delay . As you change the value, you should see the displayed

echoes shift to the left or the right.

Note: Pressing both buttons on the Function Toggle simultaneously resets the DELAY to the default value of 0.

4. After completing your selection, move the joystick up or down ( ) to navigate away from this function.

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2.6 Calibrating the Instrument

To calibrate the USM Go, follow the instructions in this section.

2.6.1 Pre-Calibration Check List

To improve the accuracy and quality of your calibration, be sure that the following steps have been taken before beginning the calibration:

• Install the probe

• Adjust the DUAL (RECEIVER) setting to match probe

• Set the material type

• Set the DISPLAY DELAY to 0 (recommended)

• Set the PRF to AUTO LOW

• Set TCG to OFF

• Set REJECT to 0 (recommended).

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2.6.2 Using AUTOCAL

Note: While following the instructions in this section, refer to Figure 14 on page 5 6 .

1. In the ACQUIRE menu, activate the AUTOCAL submenu using the joystick ( ).

2. Use the joystick ( ) to select the function titled S-REF1. Then, press the function toggle or move the joystick ( ) to change

the value to match the thickness of the thinner calibration standard. The S-REF1 function has both coarse and fine adjustment modes. Coarse adjustments are made with the function toggle, while fine adjustments are made with the joystick.

3. Use the joystick ( ) to select the function titled S-REF2. Then, press the function toggle or move the joystick ( ) to change the value to match the thickness of the thicker calibration standard. The S-REF2 function has both coarse and fine adjustment modes. Coarse adjustments are made with the function toggle, while fine adjustments are made with the joystick.

4. Apply couplant and couple the probe to the thinner calibration standard. With the A START function highlig hted, press the function

toggle or move the joystick ( ) to shift the starting point of Gate A until Gate A lies over the echo corresponding to the thickness of the thinner standard (see Figure 14 on page 56). Coarse adjustments are made with the function toggle, while fine adjustments are made with the joystick.

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2.6.2 Using AUTOCAL (cont.)

Figure 14: Auto Calibration Procedures

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2.6.2 Using AUTOCAL (cont.)

Note: During the following steps, pressing both buttons on the Gain Toggle simultaneously activates the AUTO80 function.

5. Use the joystick ( ) to select the function titled RECORD. The value in the function box changes from “OFF” to “S-REF1?”.

While maintaining the signal in Gate A, move the joystick right or left ( ) to record the reference echo. The value in the function box now reads “S-REF2?”.

6. Apply couplant and couple the probe to the thicker calibration standard. Then, use the joystick ( ) to select the function titled ASTART. Press the function toggle or move the joystick ( ) to shift the starting point of Gate A unt il Gate A lies over the echo

corresponding to the thickness of the thicker standard (see Figure 14 on page 56). Coarse adjustments are made with the function toggle, while fine adjustments are made with the joystick.

7. Use the joystick ( ) to select the function titled RECORD. While maintaining the signal in Gate A, move the joystick right or left ( ) to record the reference echo. The value in the function box now reads “OFF”.

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2.6.3 Checking the Calibration Results

Following the calibration procedure, the calculated acoustical velocity and probe delay are displayed. To view these calculated values:

1. In the ACQUIRE menu, activate the RANGE submenu using the joystick ( ).

2. Press the function toggle or move the joystick ( ) to view the following selections:

• PROBE DELAY - The adjustment made as a result of the AUTOCAL (zeroing) procedure is shown. This represents the time delay

caused by sound-wave traveling through the probe membrane, wear plate, or delay line.

• VELOCITY - The calculated velocity after the calibration is shown. The material type is listed as “custom”.

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2.7 Using the Calibration Reminder Alarm

The USM Go incorporates a timed alarm feature that causes an icon to appear on user-defined input intervals between 0.5 and 4.0 hours. To use this alarm:

1. In the SETUP menu, activate the CONFIG2 submenu using the joystick ( ).

2. Use the joystick ( ) to select the function titled CAL REMINDER, then press the center of the joystick ( ) to activate the

function. Input the intervals at which the reminder alarm will trigger (between 0.5 and 4.0 hours). Setting this value automatically resets the alarm to trigger on the specified intervals. This function also allows the alarm to be disabled.

3. Press the function toggle or move the joystick ( ) to change the alarm interval.

4. Select and activate CAL RESET to acknowledge the triggered alarm and reset it to resume normal operation.

Note: The selection of the PROBE DELAY or VELOCITY functions also resets the alarm.

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2.8 Activating Instrument Upgrades

When provided, activation codes matched to your USM Go serial number can be input via the CODE submenu, which is located in the CONFIG menu. This submenu also lists the serial number assigned to your instrument. To input an activation code:

1. In the SETUP menu, activate the CONFIG1 submenu using the joystick ( ).

2. Use the joystick ( ) to select the function titled CODE, and then press the center of the joystick ( ) to activate the function.

Note that the first character of the current code value is highlighted.

3. Use the joystick ( ) to change the highlighted character to match the value provided by GEIT. Then, move the joystick ( ) to select the next character, and continue modifying the values until they all match the code provided by GEIT.

Note: Holding either end of the Function Toggle down for three seconds resets all values in the code to 0.

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2.8 Activating Instrument Upgrades (cont.)

4. After completing the code entry, press the center of the joystick ( ) to deactivate the function.

5. Use the joystick ( ) to select the function titled CONFIRM, and then press the center of the joystick ( ) to acknowledge that

the new code is correct.

6. Be sure to follow on-screen instructions to successfully complete the activation.

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Chapter 3. Making Measurements

This chapter explains how to configure the USM Go flaw detection and thickness measurement capabilities. It then explains how to make ultrasonic measurements.

3.1 Configuring Gate A and Gate B

Setting the position and the characteristics of Gate A and Gate B is the first step in configuring the instrument for flaw detection or material thickness measurements. The GATE A and GATE B submenus control the location of Gate A and Gate B, while the EVAL and CONFIG2 submenus in the SETUP menu control the operating characteristics for the gates.

1. In the ACQUIRE menu, activate the Gate A or Gate B submenu using the joystick ( ).

2. Choose the desired function from the available options.

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3.1.1 Positioning the Gates

Use the procedures in this section to set the vertical and horizontal position of Gate A and Gate B. Remember that gate position has the following effects on instrument performance:

• A-Scan echoes on the right side of the display screen represent features that occur at a greater depth from the test-material surface than

those on the left side of the display screen. Therefore, moving a gate to the right means that the gate is evaluating a deeper portion of the test material.

• A wider gate setting means that the gate is evaluating a thicker portion of the test material.

• Increasing the vertical height, called the threshold, of a gate means that only reflected signals of sufficiently large amplitude will cross

the gate.

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3.1.1a Setting the Gate Starting Point (GATE A or GATE B-GATE START)

1. In the ACQUIRE menu, activate the GATE A or GATE B submenu using the joystick ( ).

2. Use the joystick ( ) to select the GATE A START (or GATE B START) function.

3. To change the gate starting point, either move the joystick ( ) or press the function toggle.

Increasing and decreasing the value of the starting point moves the gate to the right and left, respectively. The gate starting point remains as set here, even when width adjustments are made.

Note: The GATE A START and GATE B START functions have both coarse and fine adjustment modes. Coarse adjustments are made

with the function toggle, while fine adjustments are made with the joystick. When the function name appears in all capital letters, coarse adjustments are being made, while fine adjustments occur when the function name appears in all lower-case letters.

4. After completing your selection, move the joystick up or down ( ) to navigate away from this function.

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3.1.1b Adjusting the Gate Width (GATE A WIDTH or GATE B-GATE WIDTH)

1. In the ACQUIRE menu, activate the GATE A or GATE B submenu using the joystick ( ).

2. Use the joystick ( ) to select the GATE A WIDTH (or GATE B WIDTH) function.

3. To change the gate width, either move the joystick ( ) or press the function toggle.

Note: This function has both coarse and fine adjustment modes. Coarse adjustments are made with the function toggle, while fine

adjustments are made with the joystick.

4. After completing your selection, move the joystick up or down ( ) to navigate away from this function.

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3.1.1c Setting the Gate Threshold (Vertical Position) (A THRESHOLD or B THRESHOLD)

1. In the ACQUIRE menu, activate the GATE A or GATE B submenu using the joystick ( ).

2. Use the joystick ( ) to select the A THRESHOLD (or B THRESHOLD) function.

3. To change the gate height, either move the joystick ( ) or press the function toggle. Increasing or decreasing the value of the

threshold moves the gate up or down, respectively.

4. After completing your selection, move the joystick up or down ( ) to navigate away from this function.

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3.1.2 Selecting the TOF-Detection Method

A-Scan signals crossing either Gate A or Gate B are evaluated for the purposes of flaw detection and material thickness evaluation. When the signal crosses Gate A or Gate B, either the gate-crossing point (i.e. the flank) of the signal, or the maximum point (i.e. the peak) of the signal in that specific gate is used for evaluation purposes. The TOF MODE function allows the user to specify which A-Scan feature (FLANK or PEAK or JFLANK) is used to evaluate the signal in each gate.

1. In the ACQUIRE menu, activate the GATE A or GATE B submenu using the joystick ( ).

2. Use the joystick ( ) to select the TOF MODE function.

3. To change the gate detection mode, either move the joystick ( ) or press the function toggle. The following options are available:

• PEAK - All detection, whether time-based and peak height, is based on the HIGHEST triggering echo in the gate.

• FLANK - The time-based triggering point is the first flank to cross the gate, and amplitude-based results are based on the HIGHEST peak

of any echo crossing the gate. This is not necessarily the peak of the same echo whose flank triggered the gate.

• JFLANK - The time-based triggering point is the first flank to cross the gate, and the amplitude-based results are based on the peak of this

first echo to cross the gate. This is not necessarily the highest echo in the gate.

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3.1.2 Selecting the TOF-Detection Method (cont.)

4. After completing your selection, move the joystick up or down ( ) to navigate away from this function.

Note: The detection method chosen is indicated by a small icon. This icon is displayed in the display box containing the measured r eading,

and in the options offered in the READING 1 through 6 and LARGE function boxes.

3.1.3 Setting Gate Alarms and Outputs

An alarm can be set for either one or both of the gates. This is accomplished by configuring either Reading Box 4 (in LARGE mode) or the single Large Reading Box (in SMALL mode) to act as a virtual LED that mimics an indicator light. When so configured, the virtual LED reading box is green when there is no fault condition and red when the alarm has been triggered.

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3.1.3a Defining Gate-Alarm Logic (SETUP-CONFIG2-GATE A or B LOGIC)

Each gate alarm can be triggered by one of two circumstances: either when an A-Scan echo crosses the gate or when no A-Scan echo crosses the gate. Use the following procedure to specify the gate LOGIC settings:

1. In the SETUP menu, activate the CONFIG2 submenu using the joystick ( ).

2. Use the joystick ( ) to select the function titled GAT E A (or GATE B) LOGIC. Press the center of the joystick ( ) to activate

the function.

3. To choose the gate-alarm triggering logic, move the joystick up or down ( ). The following options are available:

• POSITIVE - An A-Scan signal crosses the gate

• NEGATIVE - No A-Scan signal crosses the gate

• OFF - No alarm is connected to the selected gate

Note: Gate A and Gate B can be configured so that either gate triggers the alarm.

4. After making your choice, press the center of the joystick ( ) to deactivate the function.

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3.1.3b Assigning Alarm Output Indicator Lights (SETUP-CONFIG2-OUTPUT SELECT)

As an option, one reading box may be configured as a virtual LED (see “Setting Gate Alarms and Outputs” on page 69), which is green when there is no fault condition and red when the alarm has been triggered. This virtual LED corresponds to an OUTPUT, which is in-turn assigned to a gate alarm. When an alarm is triggered, the virtual LED is illuminated (except when the GATE LOGIC is set to OFF). Use the following procedure to indicate which gate activates the virtual LED:

1. In the SETUP menu, activate the CONFIG2 submenu using the joystick ( ).

2. Use the joystick ( ) to select the function titled OUTPUT SELECT. Press the center of the joystick ( ) to activate the

function.

3. To configure the gate-alarm virtual LED operation, move the joystick up or down ( ). The following options are available:

• A(+), A(-) - the virtual LED indicates the Gate A alarm is triggered (see previous page for description of + and - alarms)

• B(+), B(-) - the virtual LED indicates the B Gate alarm is triggered (see previous page for description of + and - alarms)

• A or B(+), A or B (-) - the virtual LED indicates either Gate alarm is triggered (see previous page for description of + and - alarms)

4. After making your choice, press the center of the joystick ( ) to deactivate the function.

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3.1.3c Select Gate to Be Magnified When Function Toggle Is Pressed (SETUP-EVAL-MAGNIFY GATE)

The user can indicate the action to be taken when either end of the Function Toggle is pressed. One option magnifies the A-Scan display, so the assigned gate spans the entire displayed range. To specify the gate that should be magnified on demand:

1. In the SETUP menu, activate the EVAL submenu using the joystick ( ).

2. Use the joystick ( ) to select the function titled MAGNIFY GATE. Press the center of the joystick ( ) to activate the

function.

3. To select Gate A or the Gate B, move the joystick up or down ( ).

Note: Pressing the assigned end of Function Toggle, when FUNCTION1 or FUNCTION 2 is set to MAGNIFY GATE, magnifies the

display so the selected gate spans the entire displayed range.

4. After making your choice, press the center of the joystick ( ) to deactivate the function.

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3.2 Using Angle Beam Probes

When connecting an angle beam probe to the instrument, adjustments must be made for probe characteristics as well as test piece geometry. These adjustments include:

• Probe angle

• Probe X value = the distance from the probe Beam Index Point (BIP) to the front edge of its wedge

• Test piece thickness

• O-Diameter

3.2.1 Setting the Angle Beam Probe Parameters

To configure the instrument for an angle-beam probe, follow this procedure:

1. In the SETUP menu, activate the EVAL submenu using the joystick ( ).

2. Use the joystick ( ) to select the function titled PROBE ANGLE. Input the angle for the installed probe. Surface evaluation is

performed by installing the correct probe/wedge and setting this value to > 89°.

Note: This function has both coarse and fine adjustment modes. Coarse adjustments are made with the function toggle, while fine

adjustments are made with the joystick.

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3.2.1 Setting the Angle Beam Probe Parameters (cont.)

3. Use the joystick ( ) to select the THICKNESS function, and input the thickness of the test piece. The thickness of a solid rod should be input as 1/2 of its diameter.

4. Use the joystick ( ) to select the X VALUE function, and input the user-determined X value for the probe. This compensates for the distance from the BIP to the front of the probe wedge.

5. Use the joystick ( ) to select the O DIAMETER function, and input the outside diameter (from 50 to 2000 mm) of a curved test piece. When set to FLAT, curvature correction is not applied.

Note: Based on the values input for the PROBE ANGLE, THICKNESS, X VALUE, and O DIAMETER parameters, the instrument

operates in one of five modes. Each of these modes is represented by an icon in the icon area at the upper left corner of the screen. See Figure 6 on page 17 for an illustration of these icons.

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3.2.2 Indicating Leg with Color

The leg in which a reflector is encountered, can be visually indicated on the instrument display using color. Setting the COLOR LEG function, located in the EVAL submenu of the SETUP menu, to ON causes each ultrasonic time region to be displayed in a unique color.

3.3 Displaying Measured Results

The instrument is capable of displaying up to seven measured readings at one time. The displayed readings are selected using the EVAL submenu located in the SETUP menu. The parameters available for display, which depends on the instrument configuration and the evaluation mode, include the following:

• A%A - Amplitude, as a % of full-screen height, of the highest echo falling within the width of Gate A

• A%B - Amplitude, as a % of full-screen height, of the highest echo falling within the width of Gate B

Note: When S, D, P, or R readings are displayed, the Gate-Detection Mode setting for the referenced gate (A or B) is indicated by a

^ for Peak Mode or a / for Flank Mode.

• SA - Sound-Path distance or duration, represented by the highest echo or the first flank to cross Gate A

• SB - Sound-Path distance or duration, repr esented by the highest echo or the first flank to cross Gate B

• SBA - Sound-Path distance or duration, from the highest echo or the first flank in Gate A to the echo in Gate B. The reading is only

available if Gate A and Gate B are set to ON.

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3.3 Displaying Measured Results (cont.)

• DA - Material-thickness depth from the probe-contacted side of the test-piece surface to the reflector, represented by the Gate A echo.

• DB - Material-thickness depth from the probe-contacted side of the test-piece surface to the reflector, represented by the Gate B echo.

• LA - Leg number of the reflector, represented by the Gate A echo.

• LB - Leg number of the reflector, represented by the Gate B echo.

• PA - Projection distance from the probe BIP to the reflector, represented by the Gate A echo.

• PB - Projection distance from the probe BIP to the reflector, represented by the Gate B echo.

• RA - Projection distance from the probe BIP to the reflector, represented by the Gate A echo, minus the current X-VALUE.

• RB - Projection distance from the probe BIP to the reflector, represented by the Gate B echo, minus the current X-VALUE.

• A%rA - Amplitude of the signal crossing Gate A, as a percentage of the active EVAL MODE reference amplitude.

• A%rB - Amplitude of the signal crossing Gate B, as a percentage of the active EVAL MODE reference amplitude.

• dBrA - dB equivalent height difference between the signal crossing Gate A and the active EVAL MODE reference height.

• dBrB - dB equivalent height difference between the signal crossing Gate B and the active EVAL MODE reference height.

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3.3 Displaying Measured Results (cont.)

Note: Reference results (identified with “r”) behavior based on EVAL MODE are as follows:

• DAC - % Amplitude or dB compared to corresponding DAC curve point

• TCG - % Amplitude or dB compared to TCG reference level

• dB REF - % Amplitude or dB compared to reference level

• DGS - % Amplitude or dB compared to curve/size selected

• JISDAC - % Amplitude or dB compared to JIS LINE (H, M, or L) set to BOLD

• NONE - % Amplitude or dB compared to gate threshold height

• CLS - JIS CLASS (I, II, III, or IV). Available only when JISDAC evaluation mode is active.

• ERS - Evaluates the reflected echo in DGS Mode, and calculates the Equivalent Reflector Size

• GT - DGS test gain, which initializes the DGS curve maximum height at 80% FSH.

• GR - DGS reference gain, which represents the instrument gain at which the reference echo peak reaches 80% FSH.

• VIRTUAL LED - Reading box color changes from green to red when a gate alarm is triggered.

• OFF - No reading is displayed in the reading box.

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3.3 Displaying Measured Results (cont.)

The measured readings can be displayed at the top of the display screen either in six small reading boxes and one large reading box or in four large reading boxes. To set the reading box configuration:

1. In the SETUP menu, activate the RESULTS2 submenu using the joystick ( ).

2. Determine the configuration of the reading boxes by setting the MODE functio n to either LARGE (four parameters displayed) or

SMALL (six parameters displayed in small boxes and a seventh parameter displayed in a large box).

3. In the RESULTS and RESULTS2 submenus, access and set the READING 1 through READING 6 functions to select the desired result to be displayed. When time or thickness readings are displayed, the detection method selected for that gate is indicated with a ^ (representing PEAK) or / (representing FLANK or JFLANK).

Note: Under certain conditions, while TCG reference points are being recorded, two measurement results boxes are automatically set (if

not so configured already) to display SA and A%A values.

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3.4 Locking the Gain Toggle and the Joystick

The gain toggle can be locked so that pressing it has no effect on the instrument.

1. In the SETUP menu, activate the CONFIG2 submenu using the joystick ( ).

2. Use the joystick ( ) to select the function titled dB STEP. Press the center of the joystick ( ) to activate the function.

3. Move the joystick left or right ( ) to change the value of dB STEP until the word LOCK appears as the dB STEP value. The gain

toggle is now locked.

4. To unlock the gain toggle, change the setting of dB STEP to any value other than LOCK.

5. After making your choice, press the center of the joystick ( ) to deactivate the function.

Joystick operation is disabled by assigning either FUNCTION1 or FUNCTION2 to a value of JOYSTICK LOCK, then pressing that end of the Function Toggle. When the joystick is locked, the Lock icon (see Figure 6 on pa ge 17) appears on the display. To unlock the joystick, simply press the assigned end of the Function Toggle a second time.

IMPORTANT: When the joystick is locked, the center-press function still works.

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3.5 Setting the Gain

Instrument gain, which increases and decreases the height of a displayed A-Scan, is adjusted with the Gain Toggle. The instrument gain can be adjusted while in any menu location, except when the dB STEP feature is set to LOCK.

Note: Pressing both buttons on the Gain Toggle simultaneously activates the AUTO80 function.

3.5.1 Changing the Gain-Adjustment Increment (dB STEP)

When adjusting the A-Scan gain, each press of the Gain Toggle increases or decreases the gain level by a dB increment equal to the dB STEP value. Several values can be specified for dB STEP, including: a user-specified value known as the USER GAIN STEP. There is also a Gain Toggle adjustment LOCK which prevents any gain adjustment by the user. To select one of the existing dB STEP values:

1. In the SETUP menu, activate the CONFIG2 submenu using the joystick ( ).

2. Use the joystick ( ) to select the function titled dB STEP. Press the center of the joystick ( ) to activate the function.

3. Move the joystick left or right ( ) to change the value of dB STEP. Available increments include:

0.2 dB, 0.6 dB, 1.0 dB, 2.0 dB, 6 dB, a user-defined Gain Step (if one has been defined), and LOCK.

4. After making your choice, press the center of the joystick ( ) to deactivate the function.

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3.5.2 Setting the User-Defined Gain Step (SETUP-GAIN-USER GAIN STEP)

When adjusting the A-Scan gain, each press of the Gain Toggle increases or decreases the gain level by the amount of the dB STEP. To enter a user-specified gain step, known as USER GAIN STEP, complete the follo w in g steps:

1. In the SETUP menu, activate the CONFIG2 submenu using the joystick ( ).

2. Use the joystick ( ) to select the function titled USER GAIN STEP. Press the center of the joystick ( ) to activate the

function.

3. Move the joystick left or right ( ) to change the value of USER GAIN STEP. This value is now available as an option whenever the dB STEP function is activated.

4. After making your choice, press the center of the joystick ( ) to deactivate the function.

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3.6 Freezing the A-Scan Display

By using the FUNCTION1 or FUNCTION2 functions in the SETUP menu, you can program one end of the Function Toggle to FREEZE the display. Then, whenever an A-Scan is active, pressing that end of the Function Toggle freezes the A-Scan display. The active A-Scan will remain as it appeared when the toggle was pressed and the display will remain frozen until it is pressed again. While the display is frozen, the displayed readings are based on the frozen echoes.

3.7 DAC/TCG Evaluation Mode (Optional)

Note: Optional evaluation features, such as DAC/TCG, are selected via the EVAL MODE function in the EVAL menu. The functions for

the selected evaluation mode then appears in the ACQUIRE menu.

Conventional measurements can be made using the Time Corrected Gain (TCG) and Distance Amplitude Correction (DAC) modes. The functions for these modes are accessed through the DAC/TCG menu on the ACQUIRE menu bar. The DAC and TCG modes operate based on a set of user-recorded data points. These points are recorded from the DAC/TCG menu as described below.

The TCG mode displays reflectors of equal size at equal A-Scan amplitudes, regardless of the depth of the reflector in the test material. This is accomplished by adjusting the gain at different locations in the A-scan display, corresponding to different material depths, to compensate for signal loss (or variation) due to attenuation, beam spread, or other factors.

The DAC mode displays all echoes at their true amplitude, without depth compensation. However, when operating in DAC mode, a Distance Amplitude Correction curve is superimposed on the A-Scan display. The curve represents the constant reflector size at varying material depth.

GE Ultrasonic USM Go Operator's Manual

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