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NDT.net Issue - 2008-03 - NEWS
NDT.net Issue: 2008-03
Publication: e-Journal of Nondestructive Testing (NDT) ISSN 1435-4934 (NDT.net Journal)

New Multi-Mode MultiMAC Eddy Current Tester

Magnetic Analysis Corp (MAC)27, Elmsford, NY, USA

Magnetic Analysis Corp. has introduced the MultiMac", a new multi-mode eddy current tester that operates with encircling, sector, or rotary test sensors. Instead of using two separate instruments, customers can now use just one tester to detect both short and long surface defects in their product. And the new convenient MultiMac still includes all the best features of MAC's individual encircling coil and rotary probe instruments.

MultiMac includes up to 8 test channels and a wide selection of test parameters and special circuits to enhance signal-to-noise. Building on the successful Echohunter® software graphics, the MultiMac provides a Test Screen for one channel, and a Multi Screen for simultaneous display of 1 to 8 channels in polar and linear mode. The Test Display provides all the information needed to set up and operate MultiMac. All test parameters, including thresholds, are clearly shown on both screens. Each channel can be individually configured with different frequencies and different channel modes - differential, for example to detect short weld line defects, and absolute for detecting long, continuous surface flaws and open welds or magnetic inclusions. A choice of 3 thresholds per channel (All Phase, Sector, or Chord) can be mapped to any of 8 outputs, independently configurable for time or distance delay and normal, reject or latched mode.

With these features, MultiMac can operate on a wide variety of non-magnetic products, or use Direct Current saturation systems to inspect magnetic material. Test speeds can range from one foot per minute up to several thousand. Installation can be in-line or at a separate test station. MultiMac end suppression circuitry with optional optical sensor can be used for testing cut lengths to prevent false signals from leading and trailing ends. User configurable reports containing customer and product information in addition to defect location, time, amplitude and phase can be stored locally or on a network server.

Operator interface is by keyboard and mouse. The instrument is available in several different cabinet configurations. An all inclusive model, consisting of a sealed, heavy duty cabinet with built-in 17 monitor, air conditioner and pull out keyboard is available for demanding plant environments. It has the advantage that the only access needed during operation is the pullout keyboard. Other models without an air conditioner and with a separate, optional monitor are offered.

Keywords: Electromagnetic Testing (ET) (1345), eddy current testing (ECT) (564), instrumentation (454),
*Keywords are freely formed keywords from the authors and thus you may Search also for similar terms.  

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