NOTES TABLE OF CONTENTS 01.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 02.0 Quick Start Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 03.0 Keyboard, Menu and Connector Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 04.0 Principles of Ultrasonic Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.0 INTRODUCTION WARRANTY The Electromatic TI-CMXDL is an ultrasonic thickness gauge that measures with extreme versatility. It has the ability to simultaneously measure coatings and material thicknesses while maintaining the ability to locate pits, flaws and defects in the material. Based on the same operating principles as SONAR, the TI-CMXDL is capable of measuring the thickness of various materials with accuracy as high as ± 0.001 inches, or ± 0.01 millimeters.
APPENDIX A: VELOCITY TABLE Material Aluminum Beryllium Brass Bronze Cadmium Columbium Copper Glass (plate) Glycerine Gold Inconel Iron Cast Iron Lead Magnesium Mercury Molybdenum Monel Nickel Nylon Platinum Plexiglas Polystyrene PVC Quartz glass Rubber vulcanized Silver Steel (1020) Steel (4340) Steel Stainless" Teflon Tin Titanium Tungsten Uranium Water Zinc Zirconium 2.0 sound velocity in/us 0.2510 0.5080 0.1730 0.1390 0.1090 0.1940 0.1830 0.2270 0.0760 0.1280 0.2290 0.2320 0.1800 0.0850 0.2300 0.
F. Scan Bar – Another view of material thickness in a deflection style horizontal bar. This visual tool enables the user the ability to see thickness changes during high speed scans from flaws and pits. G. Units – The current measurement units being used (English, Metric). H. Digital Material Thickness Value – Smaller font size when the B-Scan display view is enabled. I.
2.3 Selecting the Transducer Type 13.0 USING If the TI-CMXDL does not identify a specific transducer type on initial power up, the user will be required to select a type from a predefined list of types by diameter and frequency. By selecting a transducer type from a predefined list, the TI-CMXDL can recall specific properties about the transducer. NOTE: Once the transducer has been selected, the TI-CMXDL will store and recall this transducer type every time the TI-CMXDL is powered on/off.
2.4 Probe Zero & One Point Calibration 12.5 Using the Default Setup The next steps are to perform a probe zero and calibrate the TI-CMXDL to the material and transducer being used. If the sound velocity is unknown, the TI-CMXDL can be calibrated to a known thickness sample. This demo will briefly explain both of these techniques.
10. Press the ENTER key to activate the Setup List Box. 11. Use the UP and DOWN arrow keys to scroll through the setups until the target location to save the Setup is highlighted. 12. Press the OK key to activate the confirmation screen. 13. Press the OK key to save the Setup, or ESC to cancel saving the Setup. 14. Finally, press the MEAS key to return to the measurement screen.
7. Repeat steps 5 & 6 until the known thickness value is correctly displayed. 8. Press the OK key to calculate the velocity and return to the menu screen, or ESC to cancel the one point calibration. 9. Finally, press the MEAS key to return to the measurement screen and begin taking readings. NOTE: CHECK YOUR CALIBRATION! Place the transducer back on the calibration point. The thickness reading should now match the known thickness. If the thickness is not correct, repeat the steps above. 2.
Known Coating Thickness 12.0 SETUPS, CREATE, STORE, EDIT & RECALL When the exact velocity of a coating is unknown, the user has the option of performing a one point calibration on a sample of the coating with a known thickness to determine the sound velocity. It would be very handy to carry a set of mechanical calipers to use in conjunction with the TI-CMXDL for calibration in the field: 1. Physically measure a location on a coating sample using a set of calipers or a digital micrometer.
11.8 Closing an active File - Close Known Coating Thickness When the exact velocity of a coating is unknown, the user has the option of performing a one point calibration on a sample of the coating with a known thickness to determine the sound velocity. It would be very handy to carry a set of mechanical calipers to use in conjunction with the TI-CMDL for calibration in the field: 1. Physically measure a location on a coating sample using a set of calipers or a digital micrometer.
2.6 11.7 Changing the active File - Open The user may have transferred grid/seq templates from a PC to the TI-CMXDL, or setup grids/seq using the TI-CMXDL at an earlier time. The name of the currently active file is always displayed at the top of the Grid/Seq Box in measurement mode (refer to photo below). It’s not only important to recognize what file is currently active, but also be able to change the active file at any time.
2.7 11.6 Editing a Grid (File) Measure The TI-CMXDL is now ready to measure. There are two different measurement view options, each with a specific purpose – Digits & B-Scan. The steps below outline how to toggle between the different view mode options: Selecting the Measurement View Option 1. Press the MENU key once to activate the menu items tab. Press the MENU key multiple times to tab right and the ESC key multiple times to tab left until the DISP menu is highlighted and displaying the submen items.
2. The user may opt to clear a specific reading and save a new one at any time. Press the CLR key in the appropriate cell location to clear the reading, take a new measurement, and press the ENTER key to save the new reading. 3. Abort the Grid/Seq Log View Box by pressing the MEAS key at any time. 11.5 Deleting Grids (Files) Alternatively, the B-START and B-DEPTH values can be changed using the Digit Edit B as follows: 1.
3.0 KEYBOARD, MENU & CONNECTOR REFERENCE 3.1 Menu Key (Operation & Sub Menus ) The Menu key activates the primary menu structure containing 8 menu tab groups. These tab groups then contain sub menu items, or functions. The sub menu items have been organized in tab groups according to how closely they are related to the individual tab group names. Let’s first get familiar with how to move around in these tabs before continuing on to the sub menu functions.
1. Use the UP and DOWN arrow keys to scroll through the new Grid or Seq List Items until INCR. DIR or DIRECTION is highlighted. MATL 2PT: Performs a two-point calibration. This option allows the user to automatica calculate the velocity by entering a second known sample thickness. Refer to section 6.3 for further info. 2. Use the LEFT & RIGHT arrow keys to toggle the Increment direction NONE, NORTH, EAST, SOUTH, or WEST for a grid, or INC, DEC for a sequential log.
DEFAULT SETUP: Loads a basic default setup. Use only as a last resort when the setups in the TI-CMXDL have been corrupted and a computer is not accessible. Refer to section 12.4 for further info. 3.7 LANGUAGE: Provides the user the ability to select different languages for the TI CMXDL. Refer to section 12.4 for further info. 1. Use the UP and DOWN arrow keys to scroll through the new Grid or Seq List Items until LOWER RIGHT or END ID is highlighted. DATA Menu 2.
6. Repeat steps 3 through 5 until the Grid or Seq Note is completed. 7. Press the OK key to save the Grid or Seq Note and return to the Grid or Seq List Items menu, or ESC to cancel entering the Grid or Seq Note. RESTORE SETUPS: Enables the user the ability to restore the setups currently saved o a PC to an TI-CMXDL via RS232 port. Refer the help section of the TI-CMXDL Datacomm software for a complete electronic manual.
3.18 Top & Bottom End Caps The top & bottom end panels are where all connections are made to the TI-CMXDL. The diagram above shows the layout and description of the connectors: Transducer Connectors Grid Log Refer to Diagram: The transducer connectors, and battery cover/probe zero disk are located on the TI-CMXDL’s top end cap. The transducer connectors are of type Lemo “00”. NOTE: There is no polarity associated with connecting the transducer to the TI-CMXDL. Sequential Log 4.
4.0 PRINCIPLES 4.1 OF ULTRASONIC MEASUREMENT Time versus thickness relationship Ultrasonic thickness measurements depend on measuring the length of time it takes for sound to travel through the material being tested. The ratio of the thickness versus the ti is known as the sound velocity. In order to make accurate measurements, a sound veloci must be determined and entered into the instrument. The accuracy of a thickness measurement therefore depends on having a consistent soun velocity.
Normal temperature range Most standard transducers will operate from 0∞F to 180∞F. High temperature measurements Special transducers and couplants are available for temperatures above 180∞F up to 650∞F with intermittent contact. It is necessary to cool the transducer, by submerging the transducer in water between readings, when measuring high temperatures.
11.0 DATA STORAGE – SETUP, EDIT, & VIEW FILES 11.1 Introduction to Grid and Sequential file formats The TI-CMXDL is equipped with two data file format options, GRID LOG and SEQ LOG. The GRID file format is very similar to a spreadsheet format found in popular software programs like Excel. A GRID is simply a table of readings. A location in a grid is specified by giving a row and column coordinate. The rows are numbered from 1 to 999 and the columns are labeled from A to ZZ (999 Rows & 52 Columns).
5.0 SELECTING THE MEASUREMENT MODE 3. Press the LEFT and RIGHT arrow keys to scroll the digit locations. 4. Repeat steps 2 & 3 until the DIFFERENTIAL value is correctly displayed. 5.1 The setup library 5. Press the OK key to set the DIFFERENTIAL value and return to the menu screen. The TI-CMXDL contains 64 user configurable preset locations to store custom setups for easy recall.
Setting the Alarm Low Limit Coating Only 1. Assuming the ALARM is ON, use the UP and DOWN arrow keys to scroll through the sub menu items until ALARM LOW is highlighted. The coating only mode should be used when the application calls for coating measurements only and the user is not interested in the thickness of the material the coating has been applied to. This mode can also be used as a stand alone coating thickness gauge, where the coating has not been applied to another material surface.
Acoustic Velocity Table Material Aluminum Beryllium Brass Bronze Cadmium Columbium Copper Glass (plate) Glycerine Gold Inconel Iron Cast Iron Lead Magnesium Mercury Molybdenum Monel Nickel Nylon Platinum Plexiglas Polystyrene PVC Quartz glass Rubber vulcanized Silver Steel (1020) Steel (4340) Steel Stainless" Teflon Tin Titanium Tungsten Uranium Water Zinc Zirconium 10.0 ADDITIONAL FEATURES OF THE TI-CMXDL sound velocity in/us 0.2510 0.5080 0.1730 0.1390 0.1090 0.1940 0.1830 0.2270 0.0760 0.1280 0.2290 0.
2. Apply a drop of couplant on the transducer and place the transducer in steady contact with the thinner of the two coating and samples. Be sure that the reading is stable and the repeatability indicator, in the top left corner of the display, is fully lit and stable. Press the MENU key once to activate the menu items tab. Press the MENU key multiple times to tab right and the ESC key multiple times to tab left until the CAL menu is highlighted and displaying the submenu items. 3.
2. Assuming the TI-CMXDL recognized the probe and the OK key was pressed, the TI-CMXDL will advance to a Zero Probe menu. If the transducer was identified as a special transducer capable of measuring coating thickness, a menu will be displayed allowing the user the ability to toggle the coating thickness display on/off as follows: One Point Calibration 3. Press the UP and DOWN arrow keys to toggle the coating option on/off.
2. Apply a drop of couplant on a piece of metal and place the coating sample on the metal over the couplant. Apply a drop of couplant on the transducer and place the transducer in steady contact with the coating and sample or actual test material. Be sure that the reading is stable and the repeatability indicator, in the top left corner of the display, is fully lit and stable. Press the MENU key once to activate the menu items tab.
7. Press the OK key to complete the probe zero function, or ESC key to cancel the probe zero function. 8. Remove the transducer from the probe zero disk, and proceed to the calibration section. NOTE: The value that is displayed will change depending on the current velocity setting in the TI-CMXDL. Disregard the number that is displayed. It is not important. What is important is accurately performing the steps outlined above to insure reliability of the probe zero calculation. 6.
(2.54mm) to 1.0” (25.4mm), the user should calibrate on a known thickness sample clos to 1.0” (25.4mm). Probe Automatically Recognized (PECT only) 1. Press the OK key once to use the identified probe, or ESC to display a list of optional transducers. NOTE: It’s always handy to carry a set of mechanical calipers to use in conjunction wit the TI-CMXDL for calibration in the field: NOTE: If the TI-CMXDL recognizes a specific transducer, the user should always select OK to use the identified probe.
9.0 PULSE-ECHO COATING & COATING TECHNIQUES Two Point Calibration 9.1 1. Physically measure an exact sample of the material or a location directly on the material to be measured using a set of calipers or a digital micrometer. Introduction to Pulse-Echo Coating Measurement (PECT) In the previous sections we’ve discussed the need for detecting pits and flaws (pulse-echo) in materials, along with the requirement to measure through and eliminate errors caused by coated materials (echo-echo).
8.0 THRU-PAINT MEASUREMENT TECHNIQUE 8.1 3. Press the ENTER key to display the list of material types. Introduction to Thru Paint Measurement The principle behind thru paint measurement is by measuring the time between two backwall echoes returning from the test material. Since both of these backwall echoes travel the same path through the paint or coating, the thickness of the coating is subtracted out of the measurement so that only the actual material thickness can be measured.
7.0 USING THE DIGITS AND B-SCAN DISPLAYS A key feature of the TI-CMXDL is the ability to toggle between two different display options, Digits and B-Scan. The Digits view provides the user with a large digital readout of the thickness. Both views also include a scan bar features that uses a bar graph to indicate thickness.
4. Alternatively, press the ENTER key to display the Digits Edit Box. 5. Press the UP and DOWN arrow keys to scroll the highlighted value. 6. Press the LEFT and RIGHT arrow keys to scroll the digit locations. 7. Repeat steps 5 & 6 until the B-Start value is correctly displayed. 8. Press the OK key to set the B-Start value and return to the menu screen, or ESC to cancel entering the B-Start. 9. Finally, press the MEAS key to return to the measurement screen and begin taking readings.
The following is a list of the viewable features on the display: A. Repeatability/Stability Indicator – This indicator should be commonly used in conjunction with the digital thickness values displayed. When all the vertical bars are fully illuminated and the last digit on the digital thickness value is stable, the TI-CMXDL is reliably measuring the same value 3 to 200 times per second, depending on which measurement mode and features are enabled. B.
CHECK•LINE BY ELECTROMATIC Ultrasonic THICKNESS GAUGE Model TI-CMXDL CHECK•LINE ® ELECTROMATIC E INSTRUMENTS Q U I P M E N T C O ., I N C . 600 Oakland Ave., Cedarhurst, NY 11516–U.S.A.
