Related Manuals for ElektroPhysik MiniTest 430
Summary of Contents for ElektroPhysik MiniTest 430
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Page 1: Operating Instructions
Technical Manual and Operating Instructions Ultrasonic Thickness Gauges MiniTest 430 / 440... - Page 2 © Editon 1, 08/2014 Version 1.0 Subject to change without notice. ElektroPhysik Dr. Steingroever GmbH & Co. KG Pasteurstr. 15 50735 Koeln, Germany Phone: +49 221 752040 Fax : +49 221 7520467 Internet: http://www.elektrophysik.com/ Mail: info@elektrophysik.com...
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Page 3: Table Of Contents
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 ...................... - Page 4 6.6 Storing Readings ......................... 28 7. Measuring Technology ......................29 7.1 Measuring Methods ......................29 7.2 Measurement on Pipes and Tubes ..................29 8. Maintenance and Precautions ....................30 8.1 Power Check ........................30 8.2 Precautions ......................... 30 8.2.1 General Precautions ....................30 8.2.2 Precautions to take during Measurement ..............
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Page 5: Introduction
Prior to use, please read the operating instructions carefully in order to get familiar with the use and all functionalities of the MiniTest 430/440 gauges. Even if you are already familiar with measurement according to the ultrasonic principle, it is highly recommended to read section 1.1 carefully. -
Page 6: Training Of The Person In Charge Of Testing
1.1.1 Training of the Person in Charge of Testing The proper use of ultrasonic test equipment requires an adequate training in the field of ultrasonic wall thickness testing. Such training should include the following subjects: theory of sound propagation in materials effect of the sound velocity inherent to material to be tested behaviour of sound waves at the interfaces between different materials propagation of the sound beam in the material... -
Page 7: Influence Of The Material To Be Tested
In other materials such as non-ferrous metals or plastics, the sound velocities are subject to major changes that might impair the measuring accuracy. 1.1.2.2 Influence of the Material to be tested Material discontinuities may lead to strong variations of the sound velocity within a measuring object. -
Page 8: Duplication Of Reading
When measuring on curved surfaces such as pipes or tubes make sure the coupling of the transceiver is made properly. The acoustic layer interface of the transceiver must be aligned so as to form a right angle to the axis of curvature of sample (longitudinal axis of tube). For small tube diameters it is recommended to carry out two measurements: one with the layer interface in vertical position to the longitudinal axis of tube, another one in parallel position to the longitudinal axis of tube. -
Page 9: Technical Specifications
2. Technical Specifications Display screen: 128 x 64 pixel dot matrix LC display, backlit Digital display: four-digits Measuring range: 0.65 mm ... 500.0 mm (steel) depending on transducer 0.1 mm (if readings > 100 mm) Display resolution: 0.01 mm (if readings < 100 mm) 0.65 mm... -
Page 10: Measuring Principle
3. Measuring Principle The ultrasonic sensor head emits an ultrasonic signal to travel through the sensor head, the couplant and finally to the measuring object. A portion of the ultrasound signal is reflected from the surface of measuring object, another one is reflected from the opposite side of the object when travelling back. -
Page 11: Description Of The Gauge And Schedule Of Supply
1. 1 x plastics carrying case 2. 1 x MiniTest gauge (model 430 or 440) 3. 1 x ultrasonic transducer (U5.0 for MiniTest 430; U5.0E for MiniTest 440) 4. 1 x couplant (gel, 200ml) 5. 1 x operating instructions (German / English / French) 6. -
Page 12: Display
4.2 Display ③ ② ① ④ ⑧ ⑤ ⑦ ⑥ 1. active batch and number or readings stored in this batch 2. transducer model 3. battery state fully charged empty 4. measuring mode measuring icon and measuring unit 6. gain mode of amplifier selection (A = Auto, L= Low , M = Medium, H = High). 7. -
Page 13: Keyboard
4.3 Keyboard ON / OFF button Menu key Press to enter the operating menu Arrow UP/DOWN keys Press UP/DOWN to scroll through the different menu options. Press arrow UP to enable / disable the backlight. OK/ESC key Press OK to confirm a selection in the menu. Press ESC to quit the menu. -
Page 14: Preparing Measurement
5. Preparing Measurement 5.1 Preparing the Gauge Please check gauge and accessories immediately upon receipt. For the supply schedule, please refer to section 4.1.2 of this manual. Please contact your supplier in case delivery is not complete or does not comply with the supply schedule you have ordered. Any damage of the gauge should be reported upon delivery. -
Page 15: Preparing The Surface Of Measuring Object
Transducer type Application U5.0: Standard transducer for MiniTest 430 to cover a wide (5.0 MHz) range of applications such as measurement on - flat surfaces - large curvature radii - objects with a thickness >... -
Page 16: Operation
”Please insert the transducer”. Insert the transducer into the gauge socket and wait for the measuring status to appear. Please make sure to connect solely original ElektroPhysik transducers suitable for MiniTest 430 / 440. Otherwise, the gauge will not work correctly and the error message “ERROR” will appear. 6.2 Taking Readings There are two options to access the measuring mode: 1. -
Page 17: Calibration
6.3.1 Calibration How to calibrate MiniTest 430 / 440 Worn off transducer or the use of different transducer models as well as the ambient temperature may lead to erratic readings. To compensate for such errors, the both models feature an “automatic calibration”. -
Page 18: How To Determine The Sound Velocity
If no such sample is available, take your measuring object and measure its thickness using a caliper or another measuring tool. 3. Now use MiniTest 430 or 440 to measure the sample in order to get a thickness value. 4. First press -key to go to the “Sound velocity”. -
Page 19: User Menu
Once your selected item appear press OK to confirm. Press ESC to quit the menu and to go to the measuring mode. MiniTest 430 / 440 6.4.1 Measuring Mode (Meas. Mode) 6.4.1.1 MiniTest 430 The gauge offers 5 different measuring modes. Please select the correct mode according to your requirements and measuring conditions. - Page 20 Difference mode: If you have adjusted a set point previously, this mode will indicate the difference between the current reading and set point. This mode is particularly suitable for quality inspection and if it is required to identify the products within the admissible thickness tolerance range. Alarm mode (Limitation): In this mode, a visual alarm will be given once the upper or lower limit (if set previously) has been exceeded.
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Page 21: Operating Modes Of Minitest 440
6.4.1.2 Operating modes of MiniTest 440 This gauge offers two different operating modes: • Available with all transducer models. I-E: Impulse-Echo mode (pulse-echo) • Only available with the U5.0E transducer for E-E: Echo-Echo mode the measurement of wall thickness through a coating. -
Page 22: Echo-Echo Mode
The different modes are shown on display as follows: 6.4.1.3.2 Echo-Echo mode The Echo-Echo (E-E) mode is able to measure between two successive back-wall echoes. This allows to measure the actual wall thickness through a coating. Please note! This function for measuring the wall thickness through a coating is only available with the U5.0E transducer model. -
Page 23: Sound Velocity
6.4.2 Sound Velocity The correct selection of the sound velocity is vital for accurate measurement. Different materials exhibit different sound velocities at which the ultrasound travels through. If you select the wrong sound velocity, measurement will be erroneous. There are two ways to select the material's sound velocity: material selection and sound velocity setting. -
Page 24: Setting Sound Velocity (Vel. Custom)
6.4.2.2 Setting Sound Velocity (vel. custom) If none of the sound velocities as stored for the 9 materials meet your requirements, the sound velocity can be adjusted individually. Please refer to the table given in the appendix, section 9 of this manual. -
Page 25: Measuring Unit
0.1 mm / 0.01 in. 6.4.4. Data Memory Both models MiniTest 430 and 440 feature a data memory for storing a maximum of 10 batches with 500 readings storable per batch. Total data memory capacity is 5000 readings. A batch memory includes the following data: readings, type of transducer head, sound velocity and selected measuring mode. -
Page 26: Select A Batch (Minitest 430 / 440)
6.4.4.1 Select a Batch (MiniTest 430 / 440) Use this function to select a batch according to your requirements. Once a batch selected, it will become active and all readings taken will be stored to this batch. Below a batch that has been selected but no readings have been taken so far. -
Page 27: Gain Setting
Suitable for a large field of applications. High: Suitable for high attenuation materials. 6.4.6 Switch Off Mode Both models, MiniTest 430 and 440, offer three different service modes: • after 2 min: automatic switch off after two minutes of idle state •... -
Page 28: Contrast
For trouble shooting, it is recommended to use this function to reset the gauge to the factory settings. 6.5 Data Processing Both models, MiniTest 430 and 440, offer two different data processing options. Press the -key to get access to the two options: •... -
Page 29: Measuring Technology
7. Measuring Technology 7.1 Measuring Methods The gauge provides four different measuring methods. 1. Single point measurement: use the transducer to measure any point of the measuring object. The reading shown is the thickness value. 2. Two point measurement (on cylindrical parts, e. g. pipes and tubs): perform two measurements on the same point of the surface of object. -
Page 30: Maintenance And Precautions
perpendicular parallel 8. Maintenance and Precautions 8.1 Power Check When the power is low, the low battery indicator appears. At this moment, users should replace the battery in time, or it will affect the measuring accuracy. Please note that the backlight will use additional power. -
Page 31: Table Of Materials And Their Typical Sound Velocity (Longitudinal Wave)
9. Table of Materials and their typical Sound Velocity (Longitudinal Wave) Material Sound velocity in/µs 0,013 Aluminium 0,250 6300 Aluminium oxide 0,390 9900 Beryllium 0,510 12900 Boron carbide 0,430 11000 Brass 0,170 4300 Cadmium 0,110 2800 Cast iron 0,180 4600 Crown glass 0,210 5300... -
Page 32: Safety Notes
Please note: The actual sound velocities depend on the temperature, composition and treatment of a material. Especially metal alloys or plastic materials may exhibit strong variations. For that reason, all values stated in the table are approximate ones. 10. Safety Notes Safe operation will be ensured as far as the instructions and notes in this manual and on the gauge are observed. -
Page 33: Declaration Of Conformity
11. Declaration of Conformity We herewith declare that the gauges MiniTest 430 and MiniTest 440 are in conformity with the provisions of directive 89/ 336 / EEC (Electromagnetic compatibility), in Germany: EMVG (Gesetz über die elektromagnetische Verträglichkeit) of November, 9th, 1992.
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