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EMS-2003C, a smart metal magnetic memory eddy current testing instrument, is a new generation non-destructive testing (NDT) instrument with advanced microelectronic, computer, magnetic memory and digital eddy current testing techniques 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 leakage magnetic field arises on it 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 The stress concentration areas can be located by detecting the normal component of leakage magnetic field on the surface In this way, whether the work piece has defects or not can be indirectly determined Besides metal magnetic memory testing function, this instrument has digital eddy current testing function which can test welding with erosion resistant coating, crack and crack depth of work piece
  • Main Feature
  • Technical Parameter
  • Application
Metal magnetic memory testing
● Measurement channel: 8 channels
● Various display mode
● Signal display: S value / K value
● Calibration way: instrument probe/geomagnetic field
● Clock for length measure: internal/external clock
● Step: 1~256mm
● Gain: 0~90dB in step of 0.5dB
● Digital filter: 1~100
● Alarm mode: alarm when HP value goes through zero (gate 10~1000) / K value alarm (1~500)
● Background suppression: off / add S1 / subtract S1
Eddy current testing
● Testing channel: 1
● Frequency number: 2
● Impedance display number: 2
● Automatic mixing unit: 1
● Frequency range: 64 Hz~5 MHz
● Gain: 0~90dB, in step of 0.5 dB
● High-pass filter: 0~500Hz
● Low-pass filter: 10Hz~10KHz
● Digital filter: 1~100
● Pregain: 10~35dB
● Driver: 8 grades
● AD sampling precision: 12 bit
● AD inversion frequency: 80MHz
● Automatic/manual amplitude and phase measure
● Impedance plane and time-base stripe curve displays
● Digital electronic balance
● Filter methods: HP / LP/ Digital filter
Composite parameters
● Microprocessor: 32 bit
● Range of operating temperature: -20C~+55C
● Storage: 4G
● Memory capacity: 128M
● Internal power supply: 14.8V,  6.3Ah  (rechargeable lithium battery)
● External power supply: DC 19 ± 2 V
● High bright TFT LCD screen: 640x480 pixel
● Instrument size: 253 x 87 x 175mm
● Early diagnostic for component fatigue damage by detecting stress concentration.
● In-service, on-line, off-line inspection of seamless and welded pipes.
● Well used for automatic testing of various components and parts, such as blade, wheel hub, gear, bolt hole, auto part, aircraft components etc.