EMS-2003, a smart magnetic memory/eddy current detecting instrument, is a new generation non-destructive testing (NDT) instrument with advanced microelectronic, computer, magnetic memory and digital eddy current detecting techniques. The experiment proves that under the action of the alternative loading, the normalization phenomenon of the magnetic domain occurs at the places containing defects and inclusions in in-service ferromagnetic components, and on it leakage magnetic field arises. At the places of defects or internal stress relative concentration the metal magnetic conductivity is in possession of minimum value, and  the tangent component of its magnetic field is in possession of maximum value, and therefore the sign of the normal component is changed and its value is zero. When the normal component of magnetic field on the surface of the component is detected by means of transducer scanning, the stress concentration areas can be determined and accordingly the possibility of existing defects in ferromagnetic components can be indirectly estimated from its. At the same time the instrument has the digital eddy current detecting function and can be applied to the detecting of cracks and the depth of cracks in the weld with anticorrosion layer and its base material.

With EMS-2003 smart metal magnetic memory/eddy current detecting instrument a new and quick detecting for stress concentration caused by material discontinuity (defects) of the equipment in service will be carried out and early diagnostic results of equipment fatigue damage given out. The instrument is equipped with various different shapes of transducers and meters for length measurement to meet inspection requirements of different shapes of components and so can be applied to NDT of boiler pressure vessels, pipes, blades, bearings, rails, gears, welds as well other ferromagnetic metal components. The magnetic memory/eddy current detecting function of the instrument can be switched each other according to detecting requirements at will.

Features

Metal magnetic memory detecting
        Measurement channel: 8 channels
        Minimum measurable distance: 1mm
        Maximum measurable distance: 150mm
        Maximum scanning velocity: 0.5m/second
        Microprocessor: 16 bits                                                                                                  
        Memorizer: 8M
        Memory capacity: 8M (expandable to 2G)
        High bright electroluminescence screen: EL 256x320
        Range of operating temperature: -25℃～＋45℃
        Internal power supply: 14.4V 4AH (rechargeable lithium battery)
        External power supply: AC 220V

Eddy current detecting
●     Frequency range: 100 Hz－5.5 MHz
●     Gain: 0－90dB，step length: 0.5 dB
●     Automatic/manual amplitude and phase measure
●     Non-equal phase/amplitude alarming
●     Independent storage of detecting programs                  
●     Impedance plane and stripe curve displays
●     Online operation prompt with hotkey help
●     Parameter、graphic Data can be transferred among instruments and microcomputers
●     Eddy current graphics can be stored、replayed、 analyzed and hard-copied
●   Selectable background for polar and right coordinate 
●   Parameter storage and recall at will
●   Automatic calendar and time display

　

systems