Extech Instruments TKG250 User Manual
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Extech Instruments TKG250 User Manual

Extech Instruments TKG250 User Manual

Ultrasonic thickness gauge
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USER GUIDE
Model TKG250
Ultrasonic Thickness Gauge

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Summary of Contents for Extech Instruments TKG250

  • Page 1 USER GUIDE Model TKG250 Ultrasonic Thickness Gauge...
  • Page 2 This document is intended for the use of Extech Instruments customers only (a Flir Systems, Inc. brand) for the purposes of the agreement under which the document is submitted, and no part of it may be reproduced or transmitted in any form or means without the prior written permission.
  • Page 3 TKG250 Ultrasonic Thickness Gauge LIABILITY Ultrasonic testing is a function of using the proper equipment (electronics, transducer, cable and couplant combination) for the inspection and a qualified operator who knows how to use this manual, the instruments and all calibration procedures. The improper use of this equipment, along with the improper calibration can cause serious damage to components, factories, facilities, personal injury and even death.

  • Page 4: Table Of Contents

    Extech Instruments Table of Contents Table of Contents ......................4 1 Getting Started ......................6 About the TKG250 Wave ..................... 6 Probe Zero ........................7 Keypad Functions ......................7 Function Keys ........................ 8 Display Screen ......................8 Using the Battery Pack....................10 Monitoring the Battery Charge from the Display Screen ........
  • Page 5 Deleting a File ......................58 Waveform Adjustments ....................65 Blanking ........................69 8 Technical Specifications ..................72 Specifications for the TKG250 .................. 72 9 Software Options ...................... 74 Echo-to-Echo ............Fel! Bokmärket är inte definierat. B-Scan .......................... 74 Saving a B-Scan to memory..................75...

  • Page 6: Getting Started

    The TKG250 offers a simple user interface packaged in a custom molded high-density plastic case with rubber keypad. This gauge offers reliable, accurate thickness readings on mostly steel structures with access to only one side. The TKG250 offers live color waveform (A-Scan).

  • Page 7: Probe Zero

    TKG250 Ultrasonic Thickness Gauge Probe Zero When turning on the TKG250, the gauge does an automatic zeroing of the transducer thus eliminating the need for an on-block zero. It will also electronically zero the transducer upon power up and at a particular time during normal operation. This feature ensures the transducer is working in accordance with electronic zeroing procedures.

  • Page 8: Function Keys

    If external temperatures are below 32F (0C), the display may be slower to update information. At the top right corner of the display screen is the “available key mode”. Color thickness TKG250- EN V2.4 11/13...
  • Page 9 TKG250 Ultrasonic Thickness Gauge Color Waveform in Echo-to-Echo, filename, id, minimum, large thickness value, Echo-to-Echo, range, echoes, blanking, gain, rectification, battery life, save, freeze and directory. RF in Zoom mode “Z” The top part of the display screen shows the File name, ID number, AA, and 0001 for grid column and row.

  • Page 10: Using The Battery Pack

    When the gauge gets below 10 %, the indicator will turn from green to red and a 5% it will flash. Note: You should power down the TKG250 to ensure any saved data is stored internally. Replacing the Battery To replace the battery pack, unscrew the battery door on the bottom of the gauge and slide out the two “AA”...

  • Page 11: Basic Gauge Operations

    2 Basic Gauge Operations Power on the Gauge To power on the TKG250 thickness gauges follow these steps: 1. Press and hold the F1 key for more than 3 seconds. The power symbol is under the F1 key printed on the keypad as shown below.

  • Page 12: Performing A Reset

    To perform a Database Reset, follow these steps: 1. From the Home screen, press the F1 – Reset key. The Reset screen appears. 2. Select the Database option and press the OK key. The following screen appears: TKG250- EN V2.4 11/13...

  • Page 13: Parameter Reset

    TKG250 Ultrasonic Thickness Gauge If you want to exit this screen press either the F1 – Exit key or F3 – No key to take no action and return to Home screen. 3. Press the F2 – Yes key to perform a Database reset.

  • Page 14: Database/Parameter Reset

    Note: If the backlight is set to Auto and you have the gauge in Hold mode, the backlight will shut off after 12 seconds. If you would like the hold to remain lit, then you must enable the backlight on instead of using Auto. TKG250- EN V2.4 11/13...

  • Page 15: About Screen

    TKG250 Ultrasonic Thickness Gauge About Screen You can find information about the TKG250 thickness gauge such as the model number, version number and contact information from the gauge‟s About screen. To go to the About Screen, follow these steps: 1. From the Home screen, press the F1 – Reset key. The following Reset screen appears: 2.

  • Page 16: Calibrating The Gauge And Making Measurements

    Press OK to perform the calibration. The unit will briefly display the calibrated velocity value in the top of the screen and then return to measure mode. TKG250- EN V2.4 11/13...

  • Page 17: Velocity And Zero Calibration

    TKG250 Ultrasonic Thickness Gauge Velocity and Zero Calibration If you have a test step block of known thicknesses but unknown material, then you can calibrate the zero and velocity of the sound in the unknown material by measuring the time of flight from the main-bang to the first back echo for thinner step and thicker step.

  • Page 18: Automatic Zero

    F1 key to acknowledge the warning message and continue using the same transducer, which may have a worn surface. 4. After three seconds or after acknowledging the warning message, the display shows the instrument parameters for 3 seconds before going to Measurement mode. TKG250- EN V2.4 11/13...

  • Page 19: Measurement Mode With A Datalogger

    TKG250 Ultrasonic Thickness Gauge Measurement Mode with a Datalogger The TKG250 thickness gauge is equipped with a datalogger, and the display screen in Measurement mode will look like the screen below: To continue in Measurement mode, follow these steps: 1. Press the F1 key to select the Save option. (See: Save section for datalogger version.)

  • Page 20: Adjusting Parameters In A-Scan Mode

    If echoes are not being detected but are somewhat visible, try increasing or decreasing the gain as described above. Here are screen shots highlighting the various parameters that can be adjusted: Alarm Highlighted Units Highlighted TKG250- EN V2.4 11/13...
  • Page 21 TKG250 Ultrasonic Thickness Gauge Rectify Highlighted Echo-to-Echo Highlighted Range Highlighted Gain Highlighted NOTE: Pay close attention when turning on Echo-to-Echo as thickness readings will not be accurate with Echo-to-Echo on versus off if you do not re-calibrate. You will also see an Echo-to-Echo cursor on the bottom of the screen to indicate where the measurements are being made.

  • Page 22: Using Setup Mode On The Gauge

    To select Measurement mode, follow these steps: 1. Press Menu OK to get to Measurement mode. 2. Use the up and down arrow keys to select the Measurement option and press the OK key. The following Setup choices are available: TKG250- EN V2.4 11/13...
  • Page 23 TKG250 Ultrasonic Thickness Gauge 3. Use the up and down arrow keys to select any of the setup parameters available and press the OK key to change the setting. You can also change the setting using the “Quick Access mode”. To do this, simply use the left and right key (indicated in the top right hand of the display screen) to change the setting of the highlighted parameter.

  • Page 24: Using The Clock

    Using the Clock The TKG250 has an internal real-time clock that includes the year, month, day and time. From the Initial Setup screen press menu/OK and scroll to clock and press Menu/OK.
  • Page 25 TKG250 Ultrasonic Thickness Gauge The entire list of available clock setup options are as follows: TIME FMT 12 HR DATE FMT MM/DD MINUTE HOUR 01 PM MONTH YEAR 2005 To set the time and date, follow these steps: 1. Select Clock option from the Initial Setup screen.

  • Page 26: Understanding An Los Reading

    Using the Fast Option From the Measurement Screen, the Fast option is available in the Setup mode in both the Datalogger and Non-datalogger versions of the gauge. To select the Fast option in Measurements mode, follow these steps: TKG250- EN V2.4 11/13...
  • Page 27 TKG250 Ultrasonic Thickness Gauge 1. Use the up and down arrow keys to highlight the Fast option and press the OK key. Or once Fast is highlighted, use Quick Access mode by pressing left or right arrow key as indicated in the top right corner of the display screen.
  • Page 28 The screens below reflect different parameters selected from the Fast option. For example, the top screen shows the FASTMAX with LAST MAX measurement on LOS, and the bottom screen shows the FASTMIN with LAST MIN measurement on LOS. TKG250- EN V2.4 11/13...

  • Page 29: Using The Gain Option

    TKG250 Ultrasonic Thickness Gauge Note: The LOS flag indicates the LAST MAX or the LAST MIN value and is shown based on the FastMax or FastMin setting. To reset the tracking of LAST MAX and LAST MIN measured value press the OK (Menu) key.
  • Page 30 3. Press the OK key to accept the parameter and return to Measure mode. In the Measure mode screen the Gain option that you select is displayed to the left of the battery indicator as shown below under the F for freeze flag on the bottom right: TKG250- EN V2.4 11/13...

  • Page 31: Using The Diff Option

    0.500”, a reading of 0.250” will result in 50% Using the Alarm Option From the Measurement Screen, the TKG250 thickness gauge offers various alarm settings to alert you of low or high thresholds via audible sounds, display flashes, sensational vibrations (if on) and illuminating keypad.
  • Page 32 Extech Instruments        Green echoes=good Red echoes = tripped alarm The Alarm option is available from the Measurement screen. TKG250- EN V2.4 11/13...
  • Page 33 TKG250 Ultrasonic Thickness Gauge 1. Use the up and down arrow keys to highlight the Alarm option and press the OK key or you can use Quick Access mode by using the right or left keys once Alarm is highlighted from the Setup mode. If you are using the non-datalogger version you can also press the F1 (Alarm) key to go directly to the Alarm option without having to go through the Setup Mode.
  • Page 34 F2 to light up yellow: Note: The Low Alarm limit will not go beyond the High Alarm limit. 5. When you are finished adjusting the setting, press the OK key to return to Measure mode. TKG250- EN V2.4 11/13...

  • Page 35: Setting The Visual And Audible Alarm

    TKG250 Ultrasonic Thickness Gauge Setting the Visual and Audible Alarm The Visual Alarm conditions can be viewed from either a red, yellow or green LED that lights up under the F1, F2, or F3 keys on the keypad. As an example, when using the 5 step English test block with thicknesses of 0.100, 0.200, 0.300, 0.400 and 0.500 inches, if you enter alarm high-low you will first need to enter the...

  • Page 36: Using The Echo-To-Echo Option

    Echo or normal mode as thickness readings and associated calibrations are mode specific.  Manual Adjustment of Gain: Again, sometimes gain will help to ensure you are reading on the correct echo. To adjust gain, see section 4: Adjusting parameters in A-Scan mode. TKG250- EN V2.4 11/13...
  • Page 37 TKG250 Ultrasonic Thickness Gauge  Rectification Mode Adjustments: Lastly, in Echo-to-Echo, sometimes using various rectification modes can “clean up” the signals so you are reading the proper echoes.
  • Page 38 The first Read line on the baseline is referred to as the Main Bang Blank while the second red line is referred to as the Blank After First Received echo. The white line represents the measured time interval between the two correct echoes. TKG250- EN V2.4 11/13...

  • Page 39: Special Gauge Functions

    TKG250 Ultrasonic Thickness Gauge 6 Special Gauge Functions The TKG250 thickness gauge has many special functions that go beyond the basics. This section will discuss these special gauge functions in detail. Using the Save Option You are able to save your data via the Save option. Please note, the save key can appear over either the F1 or F3 keys depending on how the user prefers to setup the gauge.

  • Page 40: Using The Freeze Option

    3. Press [F2] (Unfreeze) to disable the Freeze mode 4. Press [F3] (Dir) to perform file operations. (See Using the Directory Option for more information.) While in Freeze mode the menu options are disabled. The display will prompt you to unfreeze the gauge. TKG250- EN V2.4 11/13...
  • Page 41 TKG250 Ultrasonic Thickness Gauge...

  • Page 42: Using The Datalogger Directory Mode

    You can either press F3 if Min or Max clear is not present or press the Menu OK key and view this screen: Then you will see this screen: Choosing a file: Naming a file: type in name, press F3 when done TKG250- EN V2.4 11/13...
  • Page 43 TKG250 Ultrasonic Thickness Gauge Next you will need to use the up and down keys to determine the file type and amount of readings stored per file. The many types are shown here: You will also need to decide per file if you want to save thickness and a-scan as...
  • Page 44 By pressing Menu/OK and choosing datalogger or [F3] (Dir) you will be able to review, create, delete, select, rename and clear stored thickness and copy. 2. Use the up and down arrow keys to view the list of files, and select which ever one is relevant. TKG250- EN V2.4 11/13...

  • Page 45: Managing The Datalogger File System

    [Col, Row]) in order to start saving data in the new file. (See File System for more information.) Managing the Datalogger File System The TKG250 supports the following two files types:  Linear file: Consists of ID# from 0001 to 5000. The extended memory option consists of ID# from 1 to 500000.
  • Page 46 Row value is incremented first, while updating ID location, whereas, in a COLINC type file, Column value is incremented first. So for a COLINC file with END COLUMN value AF, the ID locations will increment as follows: A,1 to AF,1 then A,2 to AF,2 then A,156 to AF,156 TKG250- EN V2.4 11/13...

  • Page 47: Creating A New File

    TKG250 Ultrasonic Thickness Gauge A COLINC file with END COLUMN value ZZ will have ID increments as follows: A,1 to ZZ,1 then A,2 to ZZ,2 then A,7 to ZZ,7 Creating a new File To create a custom file in the datalogger, follow these steps: 1.
  • Page 48 5. Press [F3] (Done) when you are finished entering the filename. The following screen appears: 6. Use the left and right arrow keys to select a file type: LINEAR, ROWINC or COLINC. See the next two sections for more information on selecting file type for the new file. TKG250- EN V2.4 11/13...

  • Page 49: Selecting A Custom Linear File

    TKG250 Ultrasonic Thickness Gauge Selecting a Custom Linear File When you select a LINEAR file format the following screen appears displaying the maximum reading you can store in the LINEAR file. With the extended memory, you can store up to 100,000 readings allowing you more total files.

  • Page 50: Reviewing A File

    Measure mode, showing the new filename and next ID location in the top row as shown below. Reviewing a File To review a file from the Measurement mode screen, follow these steps: 1. Press [F3] (Dir) from the Measurement mode screen. TKG250- EN V2.4 11/13...

  • Page 51: Reviewing A Linear File

    TKG250 Ultrasonic Thickness Gauge 2. The following screen appears: 3. Select the file you would like to review using the up and down arrow keys and press the OK key. Based on the type of file you select, one of the following...

  • Page 52: Reviewing A Grid File

    F2 and F3 function keys operate in the same way as discussed in Reviewing a Linear File section. Renaming a File To rename a file from the Measurement mode screen, follow these steps: 1. Press [F3] (Dir) for the Directory mode. TKG250- EN V2.4 11/13...
  • Page 53 TKG250 Ultrasonic Thickness Gauge The following screen appears: 2. Use the up and down arrow keys to select the file you would like to rename and press the OK key. Note: The Rename option is not available for the first three factory default files.
  • Page 54 A user erases a file named ABCD by pressing [F2] (Del) and selects XYZ as the new filename and presses [F3] (Done) to accept the entered new filename. The old filename in the directory is updated with the new filename as shown. TKG250- EN V2.4 11/13...

  • Page 55: Clearing All Readings Within A File

    TKG250 Ultrasonic Thickness Gauge Clearing all readings within a File To clear (or delete) a single thickness reading at a time from a file, see Reviewing a File section. To clear all the readings from a file but keep the file structure with id still available, use the clear all readings.

  • Page 56: Copying A File

    If the file is already clear, the unit will show „NO READINGS TO CLEAR.‟ message. Copying a File To copy a file, from the Measurement mode screen, follow these steps: 1. Press [F3] (Dir) for the Directory mode. TKG250- EN V2.4 11/13...
  • Page 57 TKG250 Ultrasonic Thickness Gauge The following screen appears: 2. Use the up and down arrow keys to select a file and press the OK key. Any file structure (factory default or custom) can be copied. Note: When you copy a file only the structure of the file ID# is copied and not the associated file readings.

  • Page 58: Deleting A File

    ABCD. Deleting a File To delete a file, from the Measurement mode screen, follow these steps: 1. Press [F3] (Dir) for the Directory mode. TKG250- EN V2.4 11/13...
  • Page 59 TKG250 Ultrasonic Thickness Gauge The following screen appears: 2. Use the up and down arrow keys to select the file to be deleted and press the OK key. Note: Only custom files can be deleted. The factory default files cannot be deleted.
  • Page 60 (curr.). Press Menu OK then Diff for differential as the new file will be a differential to the old file, choose file compare, press Menu OK. The gauge will list any files with like characteristics to the current file. TKG250- EN V2.4 11/13...
  • Page 61 TKG250 Ultrasonic Thickness Gauge File compare with absolute once chosen, files of like structure appear File compare %...
  • Page 62 In the alarm file compare screen, you can even enable the vibrate feature. Alarm file compare Alarm Absolute loss and growth Alarm % loss and growth TKG250- EN V2.4 11/13...
  • Page 63 TKG250 Ultrasonic Thickness Gauge Below is a picture of the file compare screen showing the old value in the top left, differential either as a percent or absolute as well as the current reading. The file compare is based on the same i.d. as the previous reading.
  • Page 64 After downloading the file to data xl interface program, the note will appear with a particular set up number at the end of a file. TKG250- EN V2.4 11/13...

  • Page 65: Waveform Adjustments

    TKG250 Ultrasonic Thickness Gauge The following notes are available: 0. NO COMMENTS 1. Not Sand Blasted (NTSB) 2. PITTING 3. TOO HOT 4. BROKEN INSULATION 5. Couldn‟t read Scaffold (CNSR) 6. NEEDS PAINTING 7. BROKEN/MISSED PLUG 8. Obstruction (OBST) 9. Port (PORT) 10.
  • Page 66 .100” echo centered on screen inch echo centered on screen, right of screen minus left of screen equals range .28” The TKG250 has a live Color Waveform with Adjustments. Only operators familiar with detailed Ultrasonic knowledge and training should adjust waveform related functions, see liability statement in the beginning of this manual.
  • Page 67 TKG250 Ultrasonic Thickness Gauge RF signal with cursor upside down “V” Example of Echo-to-Echo with blanking indicating where the measurement is being made The color waveform is also ideal to alert the operator of an alarm condition as such: Good readings in green...
  • Page 68 Note: if you are measuring a 2 inch part with a 1” range, no echoes will be visible. Please adjust range accordingly. The Wave is defaulted to a 2 inch range as a factory setting. TKG250- EN V2.4 11/13...

  • Page 69: Blanking

    TKG250 Ultrasonic Thickness Gauge Gain-Manual or Automatic, Gain can be adjusted automatically where the gauge will set the optimum range or manually, where the operator changes the range in 1dB steps. To select Auto, use the left or right arrow keys and highlight gain on the bottom right side of the display, use the up and down arrows to select Manual for desired setting or F2 for AGC.
  • Page 70 F3 will display Thickness, see below. When this is press, the gauge will not show the A-Scan but rather the thickness in large numerals. To go back to Waveform, press F3. TKG250- EN V2.4 11/13...
  • Page 71 TKG250 Ultrasonic Thickness Gauge...

  • Page 72: Technical Specifications

    Extech Instruments 8 Technical Specifications Specifications for the TKG250 Ultrasonic Thickness Gauge with Live Color Waveform Size: 5" (127 mm) (L) x 3" (76.2 mm) (W) x 1.25" (31.75 mm) (H) Weight: 8 OZ (.23 kg) Thickness range: 0.008 - 20 inches (0.20 mm - 508 mm), depending on material, temperature and transducer selection Material velocity calibration range: 0.200-0.7362 in/μS (0.508-18.699 mm/μS)
  • Page 73 TKG250 Ultrasonic Thickness Gauge Blanking: Main Bang Blank and Blank After First Received Echo Gain: Auto or Manual in 1 dB steps for varying test conditions Echo-to-Echo: used to ignore coatings and measure substrate only B-Scan: Cross sectional representation of test piece...

  • Page 74: Software Options

    During review the thickness value is updated in the top right of the display. To save all the readings, press F1 [SAVE]. The amount of saved TKG250- EN V2.4 11/13...

  • Page 75: Saving A B-Scan To Memory

    TKG250 Ultrasonic Thickness Gauge readings up to the file size of 5,000 readings or what was pre-determined in the current file (See Datalogging) set up. Here is a picture of the B-Scan on a test block. Saving a B-Scan to memory.

  • Page 76: Technical Assistance

    Calibration, Repair, and Customer Care Services FLIR Systems, Inc. offers repair and calibration services for the Extech Instruments products we sell. NIST certification for most products is also provided. Call the Customer Service Department for information on calibration services available for this product. Annual calibrations should be performed to verify meter performance and accuracy.
  • Page 77 TKG250 Ultrasonic Thickness Gauge Calibrage, réparation et services après-vente FLIR Systems, Inc. offre des services de calibrage et de réparation pour les produits Extech Instruments que nous commercialisons. Nous fournissons également une certification NIST pour la plupart des produits. Contactez notre service client pour toute information sur les services de calibrage disponibles pour ce produit.
  • Page 78 Servicios de calibración, reparación y atención a clientes FLIR Systems, Inc., ofrece servicios de reparación y calibración para los productos que vendemos de Extech Instruments. Además ofrecemos certificación NIST para la mayoría de los productos. Llame al Departamento de Servicio al Cliente para solicitar información de calibración para este producto.

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