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CG70 Corrosion Thickness Gauges

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The CG70 range of corrosion thickness gauges with its large, easy to read display, provides users with A and B-Scan options for accurate interpretation of measurements.

The Elcometer CG70 corrosion thickness gauge is available in two models: CG70BDL and CG70ABDL. 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.

 

CG70 Thickness Gauge

Features:

  • Range of display & measurement options: Pulse-Echo, Echo-Echo ThruPaint™ technology
  • Multiple calibration and material selection options
  • Adjustable gain: -30dB to 70dB range
  • Automatic gain control (AGC)
  • 64 User definable setups
  • High speed scan: 32 readings per second
  • Differential and minimal thickness alarm modes
  • Data output and storage: 12,000 readings and waveforms or B-Scans
  • Download to ElcoMaster® data management software

Select a transducer

 

CG70BDL

Taking 32 readings per second in scan mode, the internal data logger stores up to 12,000 readings together with their waveforms. RS232 output to the Elcometer NDT data management software allows ease of analysis and professional reporting.

Click here for a full product specification. 

 

Pulsed Echo (P-E) Measurement Mode Echo Echo (E-E) Measurement Mode Automatic Gain Control (AGC) B-Scan Display Mode

CG70BDL Thickness Gauge 

CG70ABDL

As well as all the features of the CG70BDL, the CG70ABDL 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.

Click here for a full product specification. 

 

Pulsed Echo (P-E) Measurement Mode Echo Echo (E-E) Measurement Mode Automatic Gain Control (AGC) B-Scan Display Mode A-Scan Display Mode

CG70ABDL Thickness Gauge 

 

The CG70 range has 64 user definable setups and works with a wide range of transducers which can be selected from the gauges internal menu.

The gain control function in Echo-Echo mode automatically adjusts the amplitude of the received echo, but it can be overridden using the selectable low, medium and high gain options to suit the properties of the material being measured, ideal for difficult applications.

 

CG70 Features Explained

 

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 CorrectionV 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.

 

CG70 Measurement Modes Explained

 

Pulse - Echo Mode (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.		 Pulse - Echo Mode
   

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.

 Echo - Echo Mode

 

CG70 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.

 CG70 B-Scan
   

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 CG70ABDL Model only

 CG70 A-Scan

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