Maxwell Pulsed Eddy Current System
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Maxwell NDT and Ether NDE offer the Maxwell NDT PECT system, a remarkably capable pulsed eddy current inspection system that has been designed with decades of practical in-service experience at it’s very core, by one of the founding fathers of Pulsed Eddy Current technology.
PEC is an advanced electromagnetic inspection technology used in detecting flaws and corrosion in ferrous materials typically hidden under layers of coating, fireproofing, or insulation.
Applications include CUI (corrosion under insulation), high-temperature thickness monitoring, corrosion under coatings, blistering and scabs.
Pulsed Eddy Current
As opposed to conventional eddy current testing (ECT) techniques where a sinusoidal pulse is generated, PEC uses a square pulse signal to induce eddy currents within the material under test.
When an eddy current probe is excited by an electrical current, a magnetic field is generated which, when positioned on a coated surface has the ability to penetrate those layers and settle in the conductive material beneath, inducing eddy currents. Once the excitation current has been removed, the magnetic field will dissipate and the induced eddy currents will decay, gauged by the probe and the factors used to calculate the wall thickness.
Maxwell’s new PECT instrument, comprising of a ruggedized tablet computer and data acquisition unit, is splash-proof, robust and easy to operate and incorporates rapid data collection (two measurements per second) and scanning mode. The collected data is analysed in real-time with various quality control features, allowing optimal results.
Fast and reliable PECT measurements require a high-energy magnetic pulse, delivered by a dedicated powerful battery inside the data acquisition unit.
There are four standard probes, each for a different lift-off range. The probes are optimized for defect sensitivity and can either be operated from the probe itself or from the instrument.
Colour-coded wall thickness readings are displayed on the touch screen display during data recording after which an MS-Excel field report can be produced quickly.
In addition, PC-based software is provided for further analysis and reporting.