DAKOTA ULTRASONICS PR-82, Operation Manual

Page 1: ...OPERATION MANUAL DAKOTA ULTRASONICS MODEL PR 82 SONIC TESTER P N P 102 0004 Rev 1 90 August 2017 www GlobalTestSupply com Find Quality Products Online at sales GlobalTestSupply com...

Page 2: ...Dakota Ultrasonics Every precaution has been taken in the preparation of this publication Dakota Ultrasonics assumes no responsibility for errors or omissions Neither is any liability assumed for dama...

Page 3: ...NTY INFORMATION 1 3 3 6 8 9 11 12 13 17 18 21 23 27 29 DISCLAIMER Inherent in ultrasonic thickness measurement is the possibility that the instrument will use the second rather than the first echo fro...

Page 4: ...he material being measured This manual is presented in three sections The first section covers operation of the PR 82 and explains the keypad controls and display The second section provides guideline...

Page 5: ...the segments in the display After one second the tool will display the internal software version number After displaying the version number the display will show 0 000 or 0 00 if using metric units i...

Page 6: ...o adjust the sound velocity value that the PR 82 will use when calculating thickness The tool will either calculate the sound velocity from a sample of the material being measured or allow a known vel...

Page 7: ...2 is in the CAL mode this key is used to decrease numeric values on the display An auto repeat function is built in so that when the key is held down numeric values will decrement at an increasing rat...

Page 8: ...onally when the battery voltage is low the entire display will begin to flash When this occurs the batteries should be replaced These eight vertical bars form the Stability Indicator When the PR 82 is...

Page 9: ...s 199 99 millimeters the decimal point will shift automatically to the right allowing values up to 1999 9 millimeters to be displayed When the IN symbol is on in conjunction with the s symbol the PR 8...

Page 10: ...ctly in order for the PR 82 to produce accurate reliable measurements Below is a short description of the transducer followed by instructions for its use This is a bottom view of a typical transducer...

Page 11: ...ouple or transmit the ultrasonic 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...

Page 12: ...sured the PR 82 will perform four measurements every second updating its display as it does so When the transducer is removed from the surface the display will hold the last measurement made IMPORTANT...

Page 13: ...ling Extremely rough surfaces such as the pebble like finish of some cast irons will prove most difficult to measure These kinds of surfaces act on the sound beam like frosted glass on light the beam...

Page 14: ...onnectors are fully engaged Check that the wearface of the transducer is clean and free of any debris 3 On the top of the PR 82 above the display is the metal probe disc Apply a single droplet of ultr...

Page 15: ...rements it must be set to the correct sound velocity for the material being measured Different types of material have different inherent sound velocities For example the velocity of sound through stee...

Page 16: ...early all its bars on 5 Having achieved a stable reading remove the transducer If the displayed thickness changes from the value shown while the transducer was coupled repeat step 4 6 Press the CAL ke...

Page 17: ...nce more to exit the calibration mode The PR 82 is now ready to perform measurements NOTE At any time during the calibration procedure IN MM IN s or M s flashing in the display pressing the PRB 0 key...

Page 18: ...hould have nearly all its bars on 5 Having achieved a stable reading remove the transducer If the displayed thickness changes from the value shown while the transducer was coupled repeat step 4 6 Pres...

Page 19: ...keeping track of the lowest measurement it finds The transducer may be scrubbed across a surface and any brief interruptions in the signal will be ignored When the transducer loses contact with the s...

Page 20: ...that a strong stable echo is received by the PR 82 Several factors affect the strength of ultrasound as it travels These are outlined below Initial Signal Strength The stronger a signal is to begin w...

Page 21: ...to be used in tightly confined areas Also the surface area available for contacting with the transducer may be limited requiring the use of a transducer with a small wearface Measuring on a curved sur...

Page 22: ...ry to experiment with a variety of transducers in order to find one that works well for a given job Dakota Ultrasonics can provide assistance in choosing a transducer and offers a broad selection of t...

Page 23: ...urce Two AA size 1 5 volt alkaline or 1 2 volt NiCad cells 200 hours typical operating time on alkaline 120 hours on NiCad Display Liquid Crystal Display 4 5 digits 0 500 inch high numerals LED backli...

Page 24: ...ters two measurements should be performed one with the wearface gap perpendicular another with the gap parallel to the long axis of the pipe The smaller of the two displayed values should then be take...

Page 25: ...e for as short a time as needed to acquire a stable measurement While the transducer is in contact with a hot surface it will begin to heat up itself and through thermal expansion and other effects ma...

Page 26: ...ary in cast iron blocks Therefore the user should perform a calibration on the block head to be measured This is commonly done with a one point calibration refer to page 14 by finding an area on the t...

Page 27: ...5 9 M a g n e s iu m 0 2 2 8 5 7 9 1 M e rc u ry 0 0 5 7 1 4 4 8 N ic k e l 0 2 2 2 5 6 3 9 N ylo n 0 1 0 2 a p p rx 2 5 9 1 P a ra ffin 0 0 8 7 2 2 1 0 P la tin u m 0 1 5 6 3 9 6 2 P le xig la s s 0...

Page 28: ...Ultrasonics specifically disclaims any implied warranties of merchantability or fitness for a particular purpose Some states or provinces do not allow limitations on the duration of an implied warran...