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DFX-7 Flaw Detector & Thickness Gauge

The Dakota Ultrasonics model DFX-7 is both a Ultrasonic flaw detector and an ultrasonic material and coating thickness gauge. The DFX-7 Flaw detectors are designed to detect, size, position, and differentiate between flaw types in various materials and welded joints. Fast & High performance, with a 200 volt square wave pulser that can be adjusted for specific applications and transducers offers greater penetration for difficult material types, or increased resolution on noisy materials.The DFX-7 is equipped with an adjustable pulse repetition rate of 8 to 333Hz to control how fast the pulser is firing. Therefore, when scanning at higher speeds, a higher repetition rate will make the alarm trigger more responsive. In addition, the DFX-7 serves the function of a thickness gauge are specifically setup to very accurately measure thickness, locate pits, flaws and blind surface corrosion and measure coating thickness.  

DFX 7 Flaw Detector Used for a wide variety of ultrasonic testing tasks such as flaw detection, thickness gauging, weld and bond testing, and more critical safety-related and quality-related applications involving structural welds, steel beams, forgings, pipelines and tanks, aircraft engines and frames, automobile frames, railroad rails, power turbines and other heavy machinery.

Specifications
Product Specification
General Receiver  
Size: 2.5W x 6.5H x 1.24D in (63.5 x 165 x 1.5mm). Gain: 0 to 110dB with 0.2dB resolution. Manual
and AGC control.
Echo-Echo Mode (E-E) - (Thru Paint & Coatings)
range 0.050 to 4.0 inches (1.27 to 102 millimeters).
Weight: 14 ounces (.397kgs), with batteries. Damping: 50, 75, 100, 300,
600, & 1500 ohms.
Single Delay Line - 0.007 to 1.00 in (.178 to
25.4 mm). Single Contact - 0.040 in to 10 ft. (1
mm to 305 cm). Will vary based on coating.
Case: Extruded aluminum body with nickel
plated aluminum end caps (gasket sealed).
Frequency Bands: DFX-7 & 7+: Broadband 1.8 - Echo-Echo Verify (E-EV) - (Thru Paint & Coatings)
range 0.050 to 1.0 inches (1.27 to 25.4 millimeters). Will vary based on coating.
Display: 1/4 VGA AMOLED color display (320 x240
pixels). Viewable area 1.7 x 2.27 in (43.2 x
57.6 mm). 16 color pallete, multiple color options,
and variable brightness.
19 MHz (-3dB). DFX-7+: Three narrow bands at
2MHz, 5MHz, 10MHz.
Coating Only Mode (CT) - (Coating Thickness)
range 0.0005 to 0.100 inches (0.0127 to 2.54
millimeters). Range will vary +/- depending on
the coating.
One and two point calibration option for material & coating, or selection of basic material types.
Auto probe zero, recognition and temperature
compensation.
High speed scan up to 50 readings per second.
Audible alarm with hi/lo limits.
Built-in differential mode for QC inspections.
Linear time dependent gain (TDG) with adjustable slope (dB per microsecond).
Screen Refresh Rate: 60Hz. Horizontal Linearity: +/- 0.4% FSW. Memory
Display Views: Flaw Detector: Full wave, +/- Recti7ed, or RF. Thickness Gauge: Digits, +/- Recti- Vertical Linearity: +/- 1% FSH. Log Formats: Grid (Alpha Numeric), or SequenMemory
tial (Auto Identi7er).
7ed, RF, or B-Scan. Ampli4er Linearity: +/- 1 dB. Capacity: 4 Gb internal SD card.
Resolution (selectable): +/- 0.001 in (0.01 mm )or
+/- 0.0001 in (0.001mm).
Amplitude Measurement: 0 to 100% FSH,
with 1% resolution.
Screen Capture: Bitmap graphic capture for
quick documentation (.tif ).
Timing: Precision TCXO timing with single shot Delay: 0 - 999in (25,375mm) at steel velocity. Custom Setups: 64 user con7gurations.
Resolution (selectable): +/- 0.001 in (0.01 mm)or +/- 0.0001 in (0.001mm). Flaw Detector Features Power Source
Timing: Precision TCXO timing with single shot 100 MHz 8 bit ultra low power digitizer. TRIG: Trigonometric display of beam path,
depth, surface distance, and curved surface correction.
Used with angle beam transducers.
Battery: Three 1.5V alkaline, 1.2V AA Nicad cells,
1.2V AA NI-MH, or other other equivalent power source.
Measurement Gates: Two independent gates
(Flaw), and three gates (thickness). Start & width
adjustable over full range. Amplitude 5-95%, 1%
steps. Positive or negative triggering for each
gate with audible and visual alarms.
DAC: Up to 8 points may be entered and used to
digitally draw a DAC curve. Reference -2, -6 -10, (-6/-12), (-6/-14), (-2/-6/-10) dB. Amplitude
displayed in %DAC, dB, or %FSH.
Battery life (continuous use): Alkaline (12
hrs), Nicad (5hrs), and NI-MH (12hrs), with default settings.
Operating Temperature: 14 to 140F (-10C to 60C). AWS: Automatic defect sizing in accordance
with AWS D1.1 structural welding code
Line Power: USB-C to PC or power outlet.
Environmental: Meets IP65 requirements. AVG/DGS: Automatic defect sizing using probe
data. Stores up to 64 custom setups
connections.
Calibration: TCG: Time corrected gain. 50 dB dynamic range,
20 dB per microsecond, up to 8 points for curve
de7nition.
Output: Direct USB-C 1.1 PC connectivity.
Automatic Calibration: Longitudinal (straight),
Calibration
or Shear (angle).
Thickness Gauge Features Transducer Connectors: Two LEMO 00
Probe Types: Single Contact, Dual, Delay, and
Angle .
Measurement Mode: Pulse-Echo (P-E) range
0.025 in to 100 ft. (0.63mm to 3048 cm).
Certification
Units: English (in), Metric (mm).
Velocity: 0.0100 to .6300 in/µs (256–16,000 m/s).
Auto-Cal: Provides automatic calibration with two reference points. Thickness Gauge: Factory calibration traceable To LEMO 00 Certi4cation
to NIST & MIL-STD-45662A.
Test Range: 0.007 in (.178mm) to 1200 in (30,480mm) maximum at steel velocity.
Continuously variable.
Zero Offset (Probe Zero): 0–999.999 µs.
Material Velocity Table: Contains longitudinal
and shear velocities for a variety of material
types.
Detection Modes: Zero Crossing, Flank and Peak. Flaw Detector: EN12668-1 compliant.
Pulser Display Freeze: Hold current waveform on
screen.
Warranty : 2 year limited
Pulser Type: Two adjustable square wave pulsers
and receivers.
Peak Memory: Captures peak signal amplitude.  
P.R.F.: 8 to 2000Hz in selectable steps (8, 16, 32,
66, 125, 250, 333, 1000, 2000Hz).
Skip Bar: Displays skip legs in the waveform area.  
Pulser Voltage: 100-200 volt peak amplitude,
rise/fall time < 10ns into 50ohm.
Measurement Modes (Dual & Single Element):Thickness Gauge Features Pulse-Echo Mode (P-E) - (Pit & Flaw Detection)
range 0.025 to 96 in (0.63mm to 244 cm). Single
Contact - 0.040 in to 100 ft. (1 mm to 3048 cm).
Pulse-Echo Coating Mode (PECT) -
 
Pulse Width: 40 to 400 ns. Selectable step options 40, 80 & 400 ns
(labeled spike, thin & wide).
(Material,
Coating, Pit & Flaw Detection):
Material: 0.025 in
to 96 in (0.63mm to 244 cm). Coating: 0.001 to
0.100 inches (0.01 to 2.54 millimeters).
Pulse-Echo Temp Comp Mode (PETP) - (Pit &
Flaw Detection) Auto temperature compensation
-range 0.025 in to 96 in (0.63 mm to 244 cm).
 
     
Features
Features

Flaw Detector:

  •        Sizing Toolkits: DAC, AWS, TCG, DGS
  •        Exceptional visibility in sunlight (AMOLED) color VGA display (320x240 pixels)
  •        P. R . F. - 8 H z t o 2 k H z , adjustable
  •        Detection: Z-Cross, Flank & Peak

Thickness Gauge:

  •        Automatic: probe zero, probe recognition, and Temperature compensation
  •        Measurement: Variety of modes to address a number of applications
  •        Large data storage with multiple formats: Alpha numeric grid and sequential w/auto identifier
  •        Up to 12 hours of battery life using 3 AA cells

Other:

  •        PC & OSX reporting software
 
 
FAQ
FAQ
 
 
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