Dakota MX Corrosion Thickness Gauges
Product Description
The Dakota MX Corrosion Thickness Gauge range have large, easy to read displays and provides users with A and B-Scan options for accurate interpretation of measurements.
The Dakota MX corrosion thickness gauge is available in two models: MX1-DL Thickness Gauge and MX2-DL Thickness Gauge. Both models offer 2D cross sectional block view, providing a graphical representation of a material’s thickness, ideal for accurate analysis and identification of pits and corroded areas.
MX1-DL Ultrasonic Thickness Gauge: Taking 250 readings per second in scan mode, the internal data logger stores up to 4GB worth of data together with their waveforms.
MX2-DL Ultrasonic Thickness Gauge: As well as all the features of the MX1-DL Thickness Gauge, the MX2-DL Thickness Gauge also features an A-Scan display, allowing users to fully interpret and control measurement readings. The user can select to view either the full waveform (RF) or the rectified waveform (RECT) showing either the positive or the negative cycle of the full waveform.
- Measures uncoated & coated surfaces – Flexible & easy to use, the Dakota MX Corrosion Thickness range doesn’t just measure uncoated surfaces but can also measure coated surfaces. Using Echo Echo ThruPaint™ Mode (EE), coatings up to 1mm are ignored.
- Store up to 4GB of readings and waveforms or B-Scans – Taking 250 readings per second in scan mode, the internal data logger stores up to 4GB of readings together with their waveforms.
- Choose & customise the reading display – The Dakota MX ultrasonic thickness gauge range has a choice of display modes allowing the user to select the most appropriate for their needs; Readings, B-Scan, B-Scan combined with readings, Scan bar & the A-Scan on the MX2-DL Corrosion Thickness Gauge
- Repeatability / Stability Indicator – Consisting of 6 vertical bars, when all the bars are fully illuminated and the last digit on the digital thickness value is stable, the gauge is reliably measuring the material thickness.
- High Speed Scan with Minimum Thickness Display – By significantly increasing the measurement refresh rate this mode allows the user to make scanned passes over the test material. The smallest thickness value is held in memory and displayed when scanning is complete. This feature can also be used in conjunction with the minimum & maximum limit alarm feature (model dependant).
- Differential Mode – Once a user defined nominal thickness value has been set, the gauge will display the +/- thickness difference from the nominal value entered.
- Limit Alarm Mode – The user can define minimum and maximum thickness limits. If the measurement falls outside the upper or lower limit a red LED will light and the beeper sounds. A green LED will light to indicate an acceptable thickness.
V-Path Correction
Dual element transducers consist of a probe with two crystals (one to transmit and one to receive the sound pulse). The crystals are separated by an acoustic barrier – generating a ‘V-shaped’ sound path as the sound travels from one element to the other. This path is slightly longer than the direct path therefore V-path correction is used to calculate the correct thickness.
Measurement Modes
Measurement Modes Explained
Pulse Echo (PE):
The normal display mode, measures the total thickness from the base of the transducer probe to the material density boundary (typically the back wall). Ideal for pit and flaw detection.
Echo – Echo Mode (EE):
Also known as the ThruPaint™ Mode, EE ignores the coating thickness, displaying the material thickness from the top surface of the material to the material density boundary.
Display Modes Explained
Material Thickness Digits Display:
The standard display on all models, this displays the numerical thickness value in either millimetres (MM) or inches (IN).
Scan Bar Display:
A linear graphic display which allows users to graphically monitor changes in thickness readings. As the scale range can be adjusted by the user, this display is ideal for observing tiny variations in material thicknesses.
B-Scan Display:
A time based cross sectional 2D block view of the thickness provides a graphical view of the material thickness – ideal for relative depth analysis.
A-Scan Display; Full Wave (RF):*
The A-Scan display shows the sine wave created by the reflected sound, or oscillation, from the material being measured. In RF mode the full wave form is displayed.
A-Scan Display; Rectified (+ or -):*
Users can select to view either the positive or the negative cycle of the full waveform (RF). This rectified (RECT) display shows the amplitude of the echo versus the transit time.
* Available on MX2-DL Model only
Features
| Model | MX1-DL | MX2-DL |
| Display Mode | ||
| Material thickness digits display | ■ | ■ |
| B-Scan cross sectional display | ■ | ■ |
| Combined B-Scan and digits display | ■ | ■ |
| Scan Bar Display | ■ | ■ |
| A-Scan Display | + Rectified, – Rectified, Full Waveform (RF) | |
| Measurement Rate | ||
| Manual | 8 readings per second | 8 readings per second |
| Scan Mode | 250 readings per second | 250 readings per second |
| Scan bar display | 10 readings per second | 10 readings per second |
| Measurement Resolution | 0.01mm | 0.01mm |
| Velocity Calibration Range | 309.88 – 18,542m/s | 309.88 – 18,542m/s |
| Additional Features | ||
| High Speed Scan Mode | ■ | ■ |
| Differential Mode | ||
| Limit alarm mode | ■ | ■ |
| B-Scan Display Speed | 10 to 200 readings per second | 10 to 200 readings per second |
| Calibration Setups | 64 user-definable setups transferable to and from a PC archive | 64 user-definable setups transferable to and from a PC archive |
| Gates | • PE: 1 gate; EE: 2 gates, 1 gate with hold off • Adjustable threshold |
|
| Pulser Type | 150 volt square wave pulser | Square wave pulser with adjustable pulse width (spike, thin, wide) |
| Gain | Manual or automatic gain control (AGC) with 50dB range (depending on mode selected) | Manual or automatic gain control (AGC) with 40dB range (depending on mode selected) |
| Timing | Precision temperature controlled crystal oscillator (TCXO) timing with single shot 100MHz 8bit ultra-low power digitizer | 20 MHz with ultra low power 8 bit digitizer |
| Memory and Data Logging | • 4GB internal memory • Sequential and grid logging • Alpha numeric batch identification • OBSTRUCT indicates inaccessible locations • Bitmap graphic capture and capture viewer |
• 4GB internal memory • Sequential and grid logging • Alpha numeric batch identification • OBSTRUCT indicates inaccessible locations • Bitmap graphic capture and capture viewer |
| Transducer Probe Type | Dual element | Dual element |
| Transducer Frequency Range | 1 – 10MHz | 1 – 10MHz |
| Transducer Recognition | Manual – selectable from a list | Manual – selectable from a list |
| V-path / dual path error correction | Automatic | Automatic |
| Probe Zero | Manual (via integrated probe disk) | Manual (via integrated probe disk) |
| Display | 1/8 VGA (greyscale) 62 x 45.7mm viewable area |
1/8 VGA (greyscale) 62 x 45.7mm viewable area |
| Display Refresh Rate | 25Hz | 25Hz |
| Units (selectable) | mm or inches | mm or inches |
| LED Backlight | on/off/auto | on/off/auto |
| Repeatability / Stability Indicator | ■ | ■ |
Technical Specifications
| Part Number | Description | Certificate |
| Z-160-0005 | Dakota MX1-DL Thickness Gauge (MMX-7) | ■ |
| Z-149-0006 | Dakota MX2-DL Thickness Gauge (MVX) | ■ |
| Transducer Probe Type | Dual Element | |
| Measurement Accuracy1 | 0.01mm | |
| Memory | 4GB Internal Memory | |
| Operating Temperature | -10 to 60ºC | |
| Data Output | USB | |
| Power Supply | 3 x AA batteries and via USB | |
| Battery Life | Alkaline – 35 hrs, Nicad – 10 hrs and NI-MH – 35 hrs | |
| Gauge Weight | 383g – including batteries | |
| Gauge Dimensions | 63.5 x 165 x 31.5mm | |
