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7.4

Keep Equipment Clean
Keep dust from accumulating on or in the equipment, particularly with regards to the ultrasonic
transducers.  Gently blow or tap any dust or particles out of the open end of the transducers.
Dust and particles (also water) can cause the transducers to malfunction. DO NOT IMMERSE
THE TRANSDUCERS IN WATER!!! This WILL damage them. The technology behind the
Curlin-AIR is a novel approach to industrial ultrasonic inspection both in concept and in
practice. As a result the transducers are not conventional in fabrication and will not tolerate
submersion as typical immersion transducers do.

7.5

TECHNICAL ASSISTANCE

NDT SYSTEMS is available to assist with the application and operation of the Curlin-AIR
systems, including the design of reference samples.

Summary of Contents for Curlin-Air

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Page 3: ...s and Reference Standards 6 5 0 MENU DESCRIPTIONS 7 5 1 Special Menu Keyboard 7 Help Screens 7 Menu Flow 7 5 2 MENUS 8 5 2 1 MAIN MENU 8 ENERGY 8 BLANK 8 Example 8 BLNKADJ 9 GAIN 9 RANGE 9 DELAY 9 GATE 9 AMPLITUDE 9 DISTANCE 9 IF IN AMPLITUDE MODE 9 ALARM POLARITY 9 START 9 WIDTH 10 LEVEL 10 IF IN DISTance MODE 10 VELOCITY 10 ZERO ADJUST 10 BLOCK 10 LEVEL 10 AUDIO 10 5 2 2 DISPLAY MENU 10 DISP 10 ...

Page 4: ...6 Operational Considerations 14 6 7 Curlin AIR Display Characteristics 15 6 8 Factory Setup Variables 15 7 0 Flaw Detection Procedures 16 7 1 Mechanical Assembly 16 7 1 2 Adjustment of Yoke 16 7 1 3 Cable Attachment to Curlin AIR 16 7 2 Electronic Initialization Checkout 16 7 2 1 Power ON 16 7 2 2 Message Display 16 7 2 3 Automatic Initializing Set up 16 7 2 4 Insert Material Into Beam 16 7 3 CALI...

Page 5: ...8 7 5 TECHNICAL ASSISTANCE 18 8 0 Output and Optional Printer Technical Specifications 19 8 1 RS 232C Output Specifications 19 8 2 Printers 19 9 0 Battery Pack and Charger 20 10 Optional Curlin AIR Accessories 21 11 WARRANTY 22 ...

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Page 7: ...ultrasonic beam they tend to greatly reduce the normal signal amplitude In addition to the detection of localized flaws the Curlin AIR should also respond to density variations in the material sensitivity a function of the material type and degree of variation This manual serves two purposes 1 Quick Reference and 2 Tutorial C The Table of Contents of this manual is actually a TABLE INDEX Each menu...

Page 8: ...ero Adjust 0 to 3 000 000 nanoseconds 50ns increment Synchronization IP Initial Pulse Transducer Modes THRU TRANS primary mode of operation Pulse Echo Pitch Catch Display Mode Full wave rectified full wave smoothed Flaw Mode One gate selectable positive or negative threshold Visible and audible alarms triggered at pulse repetition rate Gate start variable over entire displayed range Gate width var...

Page 9: ...4 4 Transducer Cable BNC Connectors Connectors Size Weight Including Approximately 6 3 pounds Battery Pack ...

Page 10: ... of knobs are available to change continuous variables such as range delay gate positions alarm levels and reject The same variables are addressable in Curlin AIR instead of knobs holding down a key changes the variable SCROLLING When a key is continuously depressed to change a variable the effect is referred to as scrolling Scrolling produces either a visible change in the display a digital reado...

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Page 12: ...e the Curlin AIR Also present on the front panel are keys permitting the user single stroke access to HELP MENU FLAWgate menus directly 5 1 Special Menu Keyboard As you read through this manual the MENU and arrow keys allow you to navigate through the menu structure Depressing the MENU key repeatedly will cycle you through the various available menus within the Curlin AIR If you press the MENU key...

Page 13: ...s These items are logically among the first to be addressed during a new setup Last setup factory default values are automatically displayed Even though the defaults permit many kinds of ultrasonic tests using many kinds of transducers to be successfully performed precise flaw detection tests may require refinements to the default variables to better match material characteristics ENERGY Energy al...

Page 14: ...E Range is available from the front panel This function is used to determine how much time distance is represented on the horizontal axis of the A trace display Increasing or Decreasing the RANGE will cause the A trace display to expand or contract DELAY Used to adjust the start of the A trace display along the horizontal axis Gates that are synchronized with the A trace will also delay accordingl...

Page 15: ...hold allows Increase or Decrease the Measurement Threshold level Any echo with amplitude equal to or greater than the Thickness Gate Threshold will be measured The threshold gate is the bar on the left of the A Trace frame extending to the first echo in the figure This is the vertical point on the echo envelope used for the DISTance measurement AUDIO When AUDIO is On the audible annunciator will s...

Page 16: ...ng Continually adjustable from full white to full dark BEEP When BEEP is On the audible annunciator will sound when a key is pressed or when the user inputs an erroneous value If the beep is Off no sounds are generated for these conditions LOCK When selected will lock out key pad functions from inadvertently being activated 5 2 3MISC Menu BATTERY TEST Displays the Battery gage and informs the user...

Page 17: ...e displayed in the status line Rcall Recalls any ultrasonic setup stored in memory This includes the Factory Default setup NEW or any of the other 50 instrument setups Note If the gage is powered ON with the SEL HELP button depressed the Factory Default setup will be loaded When the cursor is on the SAVE or RECALL field the comment for that setup is displayed on the status line The parameter LIST ...

Page 18: ...ough time wise to obtain a reliable assessment of the inspection site for the possible presence of interfacing levels of ambient ultrasonic noise It is not advisable to perform any inspection in the presence of unacceptable levels of ambient ultrasonic noise The primary problem with the excess noise levels is that the likelihood of false indications will be high In the unlikely event that such noi...

Page 19: ...tional CRT Even at modestly short ranges measurements made visually from Curlin AIR s display are essentially equivalent to those made from CRTs Curlin AIR s thickness readouts are precise regardless of the range or stair stepped appearance of the A trace display Within a short time of familiarization with Curlin AIR s display and alarm systems the operator will adapt to the display and will espec...

Page 20: ...s you that the system is basically operational At this point you can adjust and practice changing ultrasonic pulse signal by adjusting the GAIN and RANGE controls on the front panel Also the DELAY menu function allows you to scroll the pulse across the baseline without expanding or compressing the signal in contrast to the RANGE control Move your hand or some object through the ultrasonic beam and...

Page 21: ...erved Now adjust the FLAW GATE so that the ALARM reliably triggers when the beam is held directly over the flaw 7 3 4 Maximum Scan Speed Determination Since the Curlin AIR operates with a rapid firing of ultrasonic pulses it technically cannot instantaneously detect flaws Therefore some maximum scanning speed limit is determined primarily by C The pulse repetition rate Curlin AIR portable max rate...

Page 22: ...ion DO NOT IMMERSE THE TRANSDUCERS IN WATER This WILL damage them The technology behind the Curlin AIR is a novel approach to industrial ultrasonic inspection both in concept and in practice As a result the transducers are not conventional in fabrication and will not tolerate submersion as typical immersion transducers do 7 5 TECHNICAL ASSISTANCE NDT SYSTEMS is available to assist with the applica...

Page 23: ...lity of any particular printer may change Due to this fact please contact NDT Systems for current printer recommendations Figure 5 2 1 Communications Connection The NDT systems part number for this cable is TE232 One was included with the instrument when shipped Please use this part number when ordering replacement cables NOTE IBM compatible computers may incorporate several types of RS 232 connec...

Page 24: ...ing from Alkaline batteries available from many outlets should you need to use the unit where remote power for charging is not available Please note that there is a small slide switch located on the rear panel for NiCad Alkaline battery selection It is incumbent on the user to assure the switch is in the correct position for the type of batteries being used Should the battery selection be incorrec...

Page 25: ...k and waist straps are padded for comfort and have quick clip attachments For climbing or moving about in confined spaces One is included with the original purchase of the Curlin AIR Gage Battery Powered Serial Input Printer For full screen image or thickness printouts a light weight NiCad battery powered printer is available Operation and Specifications for this printer will be found in Section 6...

Page 26: ...imited life such as batteries probes or cables nor to any instruments which have been subjected to misuse improper installation or repair alteration or use beyond the published maximum ratings of the instrument 3 BUYER S REMEDIES The Buyer s sole and exclusive remedy for breach of the above warranty shall be the repair or replacement of the instrument by NDT Systems free of charge The Buyer shall ...

Page 27: ...ny other liability of NDT Systems based upon warranty express of implied contract or the negligence of NDT Systems including but not limited to negligence in the design of the instrument or in the choice of the materials therefor or negligence in the repair or replacement of the instrument whether such repair or replacement is required by the terms hereof or is voluntary upon the part of NDT Syste...

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