Table of Contents
1. Introduction ............................................................................................................................... 5
1.1 Important Notes on Wall Thickness Measurement ................................................................ 5
Prerequisites for the use of ultrasonic wall thickness gauges ................................................. 5
1.1.1 Training of the Person in Charge of Testing .................................................................. 6
1.1.2 Limitations to Ultrasonic Testing.................................................................................... 6
1.1.2.1 Ultrasonic Wall Thickness Testing ........................................................................... 6
1.1.2.2 Influence of the Material to be tested ....................................................................... 7
1.1.2.3 Influence of Changes in Temperature ...................................................................... 7
1.1.2.4 Measurement of the Residual Wall Thickness ......................................................... 7
1.1.2.5 How to use the Couplant ......................................................................................... 7
1.1.2.6 Duplication of Reading ............................................................................................. 8
2. Technical Specifications .......................................................................................................... 9
3. Measuring Principle ................................................................................................................ 10
4. Description of the Gauge and Schedule of Supply ............................................................... 11
4.1 Description of the Gauge (Front and back Side) .................................................................. 11
4.2 Supply Schedule ................................................................................................................. 11
4.2 Display ................................................................................................................................ 12
4.3 Keyboard ............................................................................................................................. 13
5. Preparing Measurement ......................................................................................................... 14
5.1 Preparing the Gauge ........................................................................................................... 14
5.2 Selection of the Transducer ................................................................................................. 14
5.3 Preparing the Surface of Measuring Object ......................................................................... 15
6. Operation ................................................................................................................................. 16
6.1 Switch ON ........................................................................................................................... 16
6.2 Taking Readings ................................................................................................................. 16
6.3 Calibration ........................................................................................................................... 17
6.3.1 Calibration ................................................................................................................... 17
How to calibrate MiniTest 430 / 440 ................................................................................... 17
6.3.2 Determination of the Sound Velocity ........................................................................... 17
6.3.2.1 How to determine the Sound Velocity....................................................................... 18
6.3.3 Calibration of the Transducer.................................................................................... 18
6.4 User Menu .......................................................................................................................... 19
6.4.1 Measuring Mode (Meas. Mode) .................................................................................. 19
6.4.1.1 MiniTest 430 .......................................................................................................... 19
6.4.1.2 Operating modes of MiniTest 440 .......................................................................... 21
6.4.1.2.1 I-E mode ............................................................................................................. 21
6.4.1.3.2 Echo-Echo mode ................................................................................................ 22
6.4.2 Sound Velocity ............................................................................................................ 23
6.4.2.1 Materials ................................................................................................................ 23
6.4.2.2 Setting Sound Velocity (vel. custom) ..................................................................... 24
6.4.3 Measuring Unit ............................................................................................................ 25
6.4.4. Data Memory ............................................................................................................. 25
6.4.4.1 Select a Batch (MiniTest 430 / 440) ....................................................................... 26
6.4.4.2 Delete a Batch (MiniTest 430 / 440) ....................................................................... 26
6.4.5 Gain Setting ................................................................................................................ 27
6.4.6 Switch Off Mode .......................................................................................................... 27
6.4.7 Contrast ...................................................................................................................... 28
6.4.8 Language .................................................................................................................... 28
6.4.9 Gauge Data ................................................................................................................ 28
6.4.10 Standard Setting ....................................................................................................... 28
6.5 Data Processing .................................................................................................................. 28
