DAKOTA ULTRASONICS DX-1 Manual Download Page 1

DX-1 Ultrasonic Micrometer

1

INTRODUCTION

The Dakota Ultrasonics model 

DX-1

 is a precision Ultrasonic

Micrometer.  Based on the same operating principles as SONAR, the 

DX-1

is capable of measuring the thickness of various materials with accuracy as

high as 

±

 0.001 inches, or 

±

 0.01 millimeters.  The principle advantage of

ultrasonic measurement over traditional methods is that ultrasonic

measurements can be performed with access to only one side of the

material being measured.

This manual is presented in three sections.  The first section covers

operation of the 

DX-1

, and explains the keypad controls and display.  The

second section provides guidelines in selecting a transducer for a specific

application.  The last section provides application notes and a table of

sound velocity values for various materials.

Dakota Ultrasonics maintains a customer support resource in order to

assist users with questions or difficulties not covered in this manual.

Customer support may be reached at any of the following:

  Dakota Ultrasonics, 155-A DuBois Street

Santa Cruz, California 95060 USA

  Telephone:  (831) 427-4402

  Facsimile:  (831) 427-4403

  http://www.dakotainst.com

Summary of Contents for DX-1

Page 1: ...d This manual is presented in three sections The first section covers operation of the DX 1 and explains the keypad controls and display The second section provides guidelines in selecting a transduce...

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Page 3: ...erform a brief display test by illuminating all of the segments in the display After one second the gauge will display the internal software version number After displaying the version number the disp...

Page 4: ...X 1 s calibration mode This mode is used to adjust the sound velocity value that the DX 1 will use when calculating thickness The gauge will either calculate the sound velocity from a sample of the ma...

Page 5: ...DOWN arrow key has two functions When the DX 1 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 nume...

Page 6: ...red until a new measurement is made Additionally 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...

Page 7: ...millimeters If the displayed thickness exceeds 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 i...

Page 8: ...e DX 1 The transducer must be used correctly in order for the DX 1 to produce accurate reliable measurements Below is a short description of the transducer followed by instructions for its use This is...

Page 9: ...ommonly called couplant This fluid serves to couple or transmit the ultrasonic sound waves from the transducer into the material and back again Before attempting to make a measurement a small amount o...

Page 10: ...r is in contact with the material being measured the DX 1 will perform four measurements every second updating its display as it does so When the transducer is removed from the surface the display wil...

Page 11: ...ging which will inhibit proper transducer coupling 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 so...

Page 12: ...er into the DX 1 Make sure that the connectors are fully engaged Check that the wearface of the transducer is clean and free of any debris 3 On the face of the DX 1 below the keypad is the metal probe...

Page 13: ...In order for the DX 1 to make accurate measurements it must be set to the correct sound velocity for the material being measured Different types of material have different inherent sound velocities Fo...

Page 14: ...and the Stability Indicator should 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 wa...

Page 15: ...material to be measured 4 Press the CAL key once more to exit the calibration mode The DX 1 is now ready to perform measurements NOTE At any time during the calibration procedure IN MM IN s or M s fl...

Page 16: ...ckness value and the Stability Indicator should 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 t...

Page 17: ...t with the material being measured the DX 1 is 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 ignore...

Page 18: ...ergy into the material being measured such that a strong stable echo is received by the DX 1 Several factors affect the strength of ultrasound as it travels These are outlined below Initial Signal Str...

Page 19: ...job Some transducers may simply be too large 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 w...

Page 20: ...various characteristics It may be necessary 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 tr...

Page 21: ...and petroleum products Power Source 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 5...

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Page 23: ...e long axis of the pipe For smaller pipe diameters 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 o...

Page 24: ...probe be left in contact with the surface 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 throu...

Page 25: ...batch to batch The nickel content will also vary 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 calibratio...

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Page 27: ...8 8 Iro n 0 2 3 2 5 8 9 3 L e a d 0 0 8 5 2 1 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...

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Page 29: ...or implied with 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 li...

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