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ACS A1270 EMAT Operation Manual

Electro-magnetic acoustic systems; thickness gauge with the novel electro-magnetic biasing technology
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Download this manual See also: Operating Manual
ELECTRO-MAGNETIC ACOUSTIC
THICKNESS GAUGE WITH THE
NOVEL ELECTRO-MAGNETIC
BIASING TECHNOLOGY
А1270 EMAT
OPERATION MANUAL
А1270 Electro-Magnetic Ultrasonic Thickness Gauge
Acoustic Control Systems – Solutions GmbH
Saarbrücken 2018
1
ACOUSTIC
CONTROL
SYSTEMS
Operation Manual

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Summary of Contents for ACS A1270 EMAT

  • Page 1 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL ELECTRO-MAGNETIC ACOUSTIC SYSTEMS THICKNESS GAUGE WITH THE NOVEL ELECTRO-MAGNETIC BIASING TECHNOLOGY А1270 EMAT OPERATION MANUAL Acoustic Control Systems – Solutions GmbH Operation Manual Saarbrücken 2018...
  • Page 2 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS Operation Manual...

  • Page 3: Table Of Contents

    ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS CONTENTS 1 DESCRIPTION AND INSTRUMENT OPERATION ....................6 1.1 PURPOSE OF THE INSTRUMENT............................. 6 1.1.1 Purpose and application range................................6 1.1.2 Operating conditions ....................................6 1.2 TECHNICAL SPECIFICATIONS ..............................7 1.3 DESIGN AND OPERATION ................................8 1.3.1 Design ..........................................8 1.3.2 Operation principle ....................................10 1.3.3 Operation modes ......................................10...
  • Page 4 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.3.2 SETUP mode ........................................20 2.3.3 The MEMORY mode ....................................44 2.3.4 The B-SCAN mode ....................................47 2.3.5 The А SCAN mode ....................................49 2.4 DOING MEASUREMENTS ................................52 2.4.1 Functional check-out of the instrument during inspection ..................52 2.5 DATA TRANSFER TO PC ................................
  • Page 5 The modifications do not affect the technical specifications of the instrument and thus are not described in the present operation manual. The device is manufactured by: ACS-Solutions GmbH Science Park 2 66123 Saarbrucken, Germany Phone:...

  • Page 6: Description And Instrument Operation

    ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 1.1 THE INTENDED USE OF THE INSTRUMENT 1.1.1 Intended use and application range The instrument is a portable ultrasonic thickness gauge of general purpose. The instrument is designed for measurement of thickness of parts and walks of steel tubes and objects made of steel and metal alloys without the use of coupling fluids;...

  • Page 7: Technical Specifications

    ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 1.2 TECHNICAL SPECIFICATIONS The main technical specifications of the device are listed in the Table 1 Table 1 Parameter Value Range of the thickness for measurement, mm: for steel from 0.8 to 100.0 for aluminum from 1.0 to 100.0 Limits of permissible absolute measurement error of thickness,...

  • Page 8: Design And Operation

    ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 1.3 DESIGN AND OPERATION 1.3.1 Design The instrument is an electronic unit (Figure 1) to which replaceable electromagnetic ultrasonic transducers (EMAT) are connected via cables. Two rubber plugs are installed in the upper and lower end surfaces of the instrument.
  • Page 9 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS On the lower end surface of the electronic unit there is a lug for the belt, USB Micro B connector used for the USB connection of the communication cable to a PC, and a connector for connection/disconnection of the power adapter to charge the built-in battery (Figure 3).

  • Page 10: Operation Principle

    ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 1.3.2 Operation principle The operation principle of the instrument is based on the measurement of time required for the double traverse of ultra- sonic waves through the inspected object from one surface to another, which is further recalculated into the thickness value. The EMAT is used to emit the ultrasonic pulses into the object being inspected and receive the reflected pulses.

  • Page 11: Display

    ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS possible to view the selected sections of the signal, current parameters and settings, record the A-SCAN image together with the measurement result in the present mode. The SETUP mode allows the adjustment of the required measurement conditions and Figure 5 parameters.
  • Page 12 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS In the MEMORY mode the symbols informing on the presence of the signal and its level, as well as the measurement method are always indicated below. The information on the measurement units and a digital value of the measurement result is shown as well.
  • Page 13 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS The display of the thickness gauge in the MEMORY mode is shown in the Figure 7. The display of the thickness gauge in the B-SCAN mode is shown in the Figure 8. Scale range Active tab of the B-Scan...
  • Page 14 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS The display of the thickness gauge in the A-SCAN mode is shown in the Figure 9. In the A-SCAN mode the graphic image of the echo-signal, digital value of the measurement result, information on the measurement units and signal amplification are displayed.

  • Page 15: Keypad

    ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 1.3.5 Keypad The keypad (Figure 11) has 11 functional keys and the On/Off key. Figure 11 Main functions of the keys: - Key (ON / OFF) is used to switch On/Off the instrument. ATTENTION: IF NO KEY IS PRESSED AND NO MEASURMENT IS PERFORMED WITHIN 10 MINUTES THE INSTRUMENT WILL BE AUTOMATICALLY SWITCHED OFF.

  • Page 16: Proper Use

    ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.1 OPERATING RESTRICTIONS The instrument is designed to be operated under conditions listed in paragraph 1. 1 .2. 2.2 PREPARING THE INSTRUMENT FOR OPERATION 2.2.1 Connecting the transducers EMAT is used to determine the thickness of the inspected object. Two types of the transverse wave EMATs are used with the instrument - with a radial and linear polarization based on the pulsed electromagnet technology.

  • Page 17: Configuring And Adjusting The Instrument To The Parameters Of The Emat Being Used

    ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS If another transducer is connected, please adjust the instrument for operation using the new transducer. Press the key manually to switch Off the instrument. The instrument will also be automatically switched off, if no key is pressed for 10 minutes or no other measurements are performed.
  • Page 18 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.2.3.2 Adjusting the instrument to the parameters of the transducer being used The adjustment is divided into two stages. At the first stage the instrument automatically analyses the characteristics of EMAT, at the second stage the instrument adjusts to them using a real echo-signal from the calibration sample integrated in the instrument.
  • Page 19 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS - Remove the transducer from the calibration sample. - Press the key F2 (ОK). If the test result is positive, the instrument will switch into the measurement mode, if the test result is negative, the instrument will return to the main window of the SETUP mode. At any step the testing procedure can be cancelled by pressing the F2 key (Cancel), in that case the instrument will return to the main window of the SETUP mode.

  • Page 20: Working With The Instrument

    ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.3 USING THE INSTRUMENT 2.3.1 Working with the instrument During the inspection the temperature dependence between the ultrasonic propagation velocity in cooled or heated mate- rials shall be considered. For the best measurement results the instrument must be adjusted to the ultrasonic velocity by the calibration sample with the same temperature as the temperature of the inspected object.
  • Page 21 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS Table 4 Menu option Parameter value Description (parameter) Mode MEMORY / B-SCAN/ А SCAN Selects the measurement mode Enters the library of the transducers. Probe name of EMAT Starts the testing procedure of EMAT Material name of the material Enters the library with materials...
  • Page 22 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS The additional menu options of the SETUP MEMORY mode and their corresponding parameters (in the metric measurement system) and functions are listed in the Table 5. Table 5 Menu option Parameter value Description (parameter) Off –...
  • Page 23 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS The additional menu options of the SETUP B-SCAN mode, their corresponding parameters (in the metric measurement system) and functions are listed in the Table 7. Table 7 Menu option Parameter value Description (parameter) Range min-max / 0-max...
  • Page 24 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.3.2.2 Probe option - Enters the library with transducers. Active keys: F1 (Test): starts the testing procedure of EMAT adjustment of the instrument to the selected transducer; F3 (Open) or : enters the library with transducers. The Probe option is shown on the screen, Figure 20.
  • Page 25 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.3.2.3 MATERIAL option - Enters the library with materials. Active keys: F2 (Open) or enters the library with materials to record new materials into the memory and edit the existing and to select the material for operation.
  • Page 26 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS The memory contains information on 64 types of materials. The window header shows information on the currently used material (current) and ultrasonic velocity in it. Creating new material. The menu option NEW is listed in the menu first, followed by the following: names and propagation velocity of ultrasonic waves in the material types recorded in the memory (Figure 23).
  • Page 27 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS - Using the keys select a new character in the table of characters, for example “B” – , delete the highlighted character – or a character prior to the highlighted one – , and press the key To change the ultrasonic propagation velocity in the material:...
  • Page 28 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS ▼ Table 2 Purpose Switching between the characters in the letter table, where ХХХ: абв – Russian small letters F2 (XXX) АБВ – Russian capital letters abc – English small letters ABC – English capital letters Exits the editor saving the changes Editing the information on the material.
  • Page 29 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS The CALIBRATING ON option is shown on the screen, Figure 27. Active keys: F1 ( – ) or : decreases the thickness value of the calibration sample. F2 (Run): starts the procedure of velocity calibration with the sample. F2 ( + ) or : decreases the thickness value of the calibration sample.
  • Page 30 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS To calibrate the velocity: - Set the thickness of the sample. - Start the procedure of velocity calibration with the sample. - The message "Put the probe on calibrating sample and press ENTER"is displayed on the screen. - Apply some coupling liquid on the sample.
  • Page 31 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS - The current velocity measurement result will be displayed on the screen. After performing all measurements, the velocity value and the message "Save result?" are displayed on the screen. The screen layouts (orientation) of the instrument during the calibration procedure are shown subsequently in the Figure 28. Saving the velocity value obtained during calibration.
  • Page 32 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.3.2.5 The Range option (only for the B-SCAN mode) Choosing the vertical scale image during the formation of the B-Scan: MIN – MAX: minimum to maximum measured values of the vertical scale of the B-Scan are displayed; 0 -MAX: the vertical scale of the B-Scan is constantly adjusted to show the range from the point zero to the maximum measured value.
  • Page 33 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.3.2.7 The LIMIT: BEGINNING option (only for the MEMORY mode) Sets the lower limit of actuation of the Monitor. Permissible values vary from 0 to 150 mm. The LIMIT of the instrument: the beginning option is presented in the Figure 33. Active keys: F1 ( –...
  • Page 34 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.3.2.9 The AVERAGING, QUANTITY option Setting the value of signal averaging. Permissible values: 1. 2, 4, 8, 16. Screen appearance of the instrument's AVERAGING, QUANTITY option is presented in Figure 35. Active keys: F1 ( –...
  • Page 35 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.3.2.11 The CLEAR MEMORY option (only for the MEMORY mode) Deleting the measurement results from the memory. The filling percentage of the memory with the measurement results is specified as an option parameter. The screen CLEAR MEMORY option is shown in the Figure 37.
  • Page 36 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.3.2.12 The SCAN BEGINNING (for the А SCAN mode only) The option SCAN BEGINNING is used to set the start point of the image area of the А-Scan on the screen. The value of the scan beginning can be set within the range from 0 to 295.0 mm. The screen SCAN BEGINNING option is shown in the Figure 39.
  • Page 37 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.3.2.14 The GATE:BEGINNING (only for the А SCAN mode) The GATE:BEGINNING option is used for setting the lower limit of the strobe. Values can be set within the range from 0 to 300 mm. The screen GATE:BEGINNING option is shown in the Figure 41.
  • Page 38 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.3.2.16 The Gain option (only for the А SCAN mode) The Gain option is used for setting the amplification value of the receiving channel. The Gain value can be set within the range from 0 to 40 dB. The screen Gain option is shown in the Figure 43.
  • Page 39 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.3.2.18 The ORIENTATION option Selecting the image orientation type – Hor.R. / Vert / Hor.L. The screen ORIENTATION option is shown in the Figure 45. Active keys: F1 (Hor.L.): horizontal left. F2 (Vert): vertical. F3 (Hor.R.): horizontal right.
  • Page 40 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.3.2.20 The VIBRATION option Switching On/Off the vibration indication. For the convenient operation of the thickness gauge the main events of the thickness gauge during measurements, adjust- ment and key pressing are accompanied by vibration. The vibration also informs the operator on the current processes without influencing the measurement results.
  • Page 41 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.3.2.22 The MEASURING UNITS option Selects the measurement unit system - MM / INCHES. The screen MEASURING UNITS option is shown in the Figure 49. Active keys: F1 (mm): the metric measurement units. The thickness is displayed in mm, the velocity is displayed in в...
  • Page 42 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.3.2.23 The BRIGHTNESS option Setting the screen brightness within the range from 20 to 100 %. The screen BRIGHTNESS option is shown in the Figure 50. Active keys: F1 (–) or : decreases the screen brightness. F3 (+) or : increases the screen brightness.
  • Page 43 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.3.2.25 TIME option Setting the time. The menu item TIME is shown in the Figure 53. The TIME editing procedure is similar to the DATE editing (p. 2.3.2.24). Figure 52 Figure 53 Operation Manual...

  • Page 44: The Memory Mode

    ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.3.3 The MEMORY mode In the MEMORY mode the screen is divided into two parts: in the upper part the measurement information is shown (thick- ness, signal level, measurement method, velocity of the ultrasonic wave in the current material), in the lower part the informa- tion on the previously recorded results (groups, cells of the groups and thickness measurement results) is shown (Figure 54).
  • Page 45 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS ATTENTION: WHEN EMAT IS REMOVED FROM THE INSPECTED OBJECT, THE MEASUREMENT RESULT WILL IMMEDIATELY CHANGE TO THE HORIZONTAL STROKES! : saves the current result. Note: the result will be recorded into the first free cells of the last existing group. You can correct the value recorded in the memory according to the instructions given in the paragraph 0.
  • Page 46 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.3.3.1 Adding a new/deleting the last group Upon pressing the key F3 the message "Add new or remove the last group?" will be displayed on the screen (Figure 56). Active keys: F1 (–): deletes the last group. F2 (Cancel): exits the procedure.

  • Page 47: The B-Scan Mode

    ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS results. Scrolling through the measurement results is done using the group cells, according to the selected view direction. When the last/first cell in the group is reached, the scrolling will go to the next/previous group of the results correspondingly. Do the following to correct the result: By means of the keys go to the cell with the result you want to correct;...
  • Page 48 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS Active keys: : changing the sweep length. F1 (Review): viewing the saved B-Scans. F2 (Clean) – cleaning current B-Scan. F3 (Save): saving thе current В Scan. Saving B-Scan By pressing the F3 (Save) key, a message will appear on the screen requiring confirmation, «Save current B-Scan?». Active keys: F1 (Saving): saving В...

  • Page 49: The А Scan Mode

    ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.3.5 The А SCAN mode The thickness measurement in the А SCAN mode is the analysis of the image shape of the obtained echoed signal, a se- lection of the analysis interval and criteria for calculation of propagation time of the ultrasonic pulses through the material of the object from one surface to another one.
  • Page 50 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS Table 10 contains the description of the keys for the second active icon. Table 10 Designation Changing the scanning length Changing the amplification value Figure 60 Horizontal scrolling of the signal on the screen Table 11 contains the description of the keys for the third active icon.
  • Page 51 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS Press the key to enter the view mode and press the F2 key (А Scan) (Figure 62). The А Scan saved for the selected result will be displayed in the upper part of the screen (Figure 63). To return to the view mode of the results, press the F2 (А...

  • Page 52: Doing Measurements

    ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.4 PERFORMING MEASUREMENTS Prior to thickness measurement select a transducer from the library, adjust the instrument and chose the material for measure- ment. If the set propagation velocity in the material differs from the actual value, adjust the velocity manually or perform the calibration. The accuracy of the settings influences the measurement accuracy directly.

  • Page 53: Data Transfer To Pc

    ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS 2.5 DATA TRANSFER TO PC To transfer the data recorded in the instrument to a PC, connect the instrument to a PC by means of the USB A – Micro B cable from the delivery kit. The operation system will detect the connected instrument as an external removable disk under the name ACSYS DISC.

  • Page 54: Technical Maintenance

    ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS The maintenance of the thickness gauge includes cleaning the electronic unit from dust and dirty and charging the re- chargeable battery. 3.1 ACCUMULATOR The rechargeable battery is designed to be operated in a broad temperature range. At negative temperatures battery capacity decreases.

  • Page 55: Storage

    ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS The instruments should be shelf stored. The arrangement of the instruments in a warehouse shall enable their free movement by the personnel and unrestricted access to them. The distance between the instruments and the walls, floor of the warehouse and other warehoused instruments shall be at least 100 mm.

  • Page 56: Transportation

    ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS The thickness gauge should be transported in the case included in the delivery kit. The packaged instruments can be transported by any vehicle types for any distances without speed restrictions. The packaged instruments shall be properly fastened in the transport vehicle. The packaged instruments shall be protected from precipitation and water splashes if the instruments will be transported in an open transport vehicle.
  • Page 57 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS NOTES Operation Manual...
  • Page 58 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS NOTES Operation Manual...
  • Page 59 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS Operation Manual...
  • Page 60 ACOUSTIC А1270 Electro-Magnetic Ultrasonic Thickness Gauge CONTROL SYSTEMS ELECTRO-MAGNETIC ACOUSTIC THICKNESS GAUGE WITH THE NOVEL ELECTRO-MAGNETIC BIASING TECHNOLOGY А1270 EMAT OPERATION MANUAL Revision: February 2018 Operation Manual...

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