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DAKOTA ULTRASONICS PR-9, Operation Manual

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DAKOTA ULTRASONICS PR-9 Operation Manual Download Page 23

PR-9 

Sonic thickness tester 

 

19 

 

Note:  

CHECK YOUR CALIBRATION!  Place the transducer back on the 

calibration points.  The thickness readings should now match the known 

thickness values with minimal error.  If the thicknesses are not correct, repeat 

the steps above.

 

 

Summary of Contents for PR-9

Page 1: ...OPERATION MANUAL DAKOTA ULTRASONICS P PR R 9 9 Sonic Thickness Tester Racing P N P 309 0002 Rev 1 11 November 2019...

Page 2: ......

Page 3: ...ONIC MEASUREMENT 8 3 1 TIME VERSUS THICKNESS RELATIONSHIP 8 3 2 SUITABILITY OF MATERIALS 8 3 3 RANGE OF MEASUREMENT AND ACCURACY 8 3 4 COUPLANT 8 3 5 TEMPERATURE 9 3 6 MEASUREMENT MODES 9 CHAPTER FOUR...

Page 4: ...APPENDIX B APPLICATION NOTES 26...

Page 5: ...in this manual Customer support may be reached at any of the following Dakota Ultrasonics Corporation 1500 Green Hills Road 107 Scotts Valley CA 95066 Tel 831 431 9722 Fax 831 431 9723 www dakotaultr...

Page 6: ...he ENTER key similar to a computer keyboard This key will be used to select or set a menu option Note Unit will automatically power off when idle for 5 minutes All current settings are automatically s...

Page 7: ...n will only illuminate the display when the PR 9 is measuring or receiving an echo If either ON or AUTO are selected there are three brightness options LO MED HI to select a preferred overall brightne...

Page 8: ...ickness measurement velocity or alpha message will be displayed in this area C Measurement Modes This icon indicates the measurement mode The PR 9 operates exclusively in pulse echo P E mode only D St...

Page 9: ...luminated in this row across the bottom of the LCD display which features are currently enabled For a complete list refer to page 20 The PR 9 can be locked once calibrated to avoid accidently changing...

Page 10: ...trasonic sound waves from the transducer into the material and back again Before attempting to make a measurement a small amount of couplant should be applied to the surface of the material being meas...

Page 11: ...olarity associated with connecting the transducer to the PR 9 it can be plugged into the gauge in either direction Probe Zero Disk Battery Cover Refer to Diagram The Battery cover is the large round d...

Page 12: ...ss measurement is practical in a wide variety of materials including metals plastics and glass Materials that are difficult include some cast materials concrete wood fiberglass and some rubber 3 3 Ran...

Page 13: ...lp to minimize these errors 3 6 Measurement Modes This section will cover the different measurements modes of the PR 9 the transducers required and the reasons for using specific modes Pulse Echo P E...

Page 14: ...pending on the material frequency and diameter A limitation of dual element delay line transducers is the V shaped sound path Because the sound travels from one element to another the time versus thic...

Page 15: ...ss are required while still requiring the ability to detect flaws and pits A special coating style transducer is required for use in this mode There are a variety of coating transducers in various fre...

Page 16: ...inherent surface noise issues or mirroring effect Higher frequency transducers 7 10MHz offer improved resolution to avoid erroneous measurements Restricted access Measuring materials with extreme cur...

Page 17: ...list of common materials in the PR 9 or for greater precision determined from a sample of the test material that has been mechanically measured To enter the velocity from a table look up the material...

Page 18: ...ties For example the velocity of sound through steel is about 0 233 inches per microsecond versus that of aluminum which is about 0 248 inches per microsecond If the gauge is not set to the correct so...

Page 19: ...own However a sample with one or two known thicknesses can be used to determine the sound velocity As previously discussed the PR 9 has a one or two point calibration option The one point calibration...

Page 20: ...corner of the display is fully lit and stable 3 Press the key to enter the calibration edit screen displaying the current measurement value 4 Use the keys to scroll to the known thickness value Note...

Page 21: ...e a one point calibration would be performed at 250 6 35mm and a two point calibration at 080 2 03mm or something close to the min max values of the measurement range Note The PR 9 also offers the cap...

Page 22: ...Pressing the key prior to pressing the key will abort the cal routine without saving any changes 5 Once the known thickness value is being displayed press the key to display 1 of 2 which sets the zer...

Page 23: ...19 Note CHECK YOUR CALIBRATION Place the transducer back on the calibration points The thickness readings should now match the known thickness values with minimal error If the thicknesses are not cor...

Page 24: ...al while still maintaining a reasonable representation of thickness over the area or region scanned The procedure to use the scan feature is outlined below High Speed Scan 1 Press the key to toggle SC...

Page 25: ...prior to pressing the key will abort to the measurement screen without saving changes 3 When the desired LITE setting is displayed press the key to set the status and edit the BRT brightness option 4...

Page 26: ...nated on the display 2 To unlock the PR 9 repeat step one but hold down the key while powering the PR 9 on 6 5 Factory Defaults The PR 9 can be reset to factory defaults at any time to restore the ori...

Page 27: ...of the MEDI ZERO settings prior to performing a reset These values will need to be entered back in the gauge following the reset 4 Press the keys to scroll REST reset 5 Press the key to edit the reset...

Page 28: ...0 1280 3251 Inconel 0 2290 5817 Iron 0 2320 5893 Cast Iron 0 1800 approx 4572 Lead 0 0850 2159 Magnesium 0 2300 5842 Mercury 0 0570 1448 Molybdenum 0 2460 6248 Monel 0 2110 5359 Nickel 0 2220 5639 Nyl...

Page 29: ...PR 9 Sonic thickness tester 25 Tin 0 1310 3327 Titanium 0 2400 6096 Tungsten 0 2040 5182 Uranium 0 1330 3378 Water 0 0580 1473 Zinc 0 1660 4216 Zirconium 0 1830 4648...

Page 30: ...st be observed At temperatures above this point the change in sound velocity of the material being measured starts to have a noticeable effect upon ultrasonic measurement At such elevated temperatures...

Page 31: ...minimize error is another option An additional important consideration when measuring laminates is that many included air gaps or pockets which will cause an early reflection of the ultrasound beam T...

Page 32: ...h respect to this product Dakota Ultrasonics specifically disclaims any implied warranties of merchantability or fitness for a particular purpose Some states or provinces do not allow limitations on t...

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