Eddy current tester is best of both worlds
A
Magnetic Analysis Corporation product story
Edited by the Engineeringtalk editorial team
Feb 15, 2008
Windows-based multimode eddy current tester operates with encircling/sector test coils (to detect short-surface defects) and/or rotary test probes (to identify long, seam-type surface defects).
New from Magnetic Analysis Corp, MultiMac is a Windows-based multimode eddy current tester that operates with encircling/sector test coils (to detect short-surface defects) and/or rotary test probes (to identify long, seam-type surface defects).
The new multimode capability incorporates all of the best features of MAC's individual encircling coil and rotary probe instruments into one unit.
The MultiMac includes up to eight test channels, and a wide selection of test parameters and special circuits to enhance signal-to-noise ratio.
Building on the successful Echohunter software graphics, the instrument's test screen displays a single channel, and the multiscreen provides a simultaneous display of up to eight channels.
The test screen provides all the information needed to set up and operate MultiMac.
Both screens display simultaneous polar and linear modes and all test parameters, including thresholds.
Each channel on the MultiMac can be individually configured with different frequencies and different channel modes.
For example: "differential" mode is used to detect short weld-line defects, and "absolute" mode is appropriate for long, continuous surface flaws and open welds.
A choice of three thresholds per channel - all phase, sector or chord - can be mapped to any of eight outputs, independently configurable for time or distance delay and normal reject or latched mode.
With these features, MultiMac can be used to test a wide variety of nonmagnetic products, or inspect magnetic material by using direct current saturation systems.
A special configuration of channels, based on flux leakage phenomenon, provides detection of very small subsurface steel inclusions in copper or aluminium rod.
Test speeds for the MultiMac can range from one to several thousand per minute.
MultiMac offers end-suppression circuitry with optional optical sensor to prevent false signals from leading and trailing ends.
The MultiMac offers enhanced recording capability and remote access through in-plant networks or the Internet.
Featuring user-configurable reports, data output can include customer and product information, defect location, time, amplitude, and phase.
Reports can be stored locally on a network server or on a flash memory device using the USB port.
Operator interface for the Windows-based system is by use of a keyboard and mouse.
The all-inclusive model, designed for demanding plant environments, consists of a sealed, heavy-duty cabinet with a built-in 17in monitor, air conditioner and pull-out keyboard.
Other smaller models can be supplied with the pull-out keyboard, an air conditioner and separate, optional monitor.
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