Eddy current testing(ETC)is a technique used for untouched detection on metal parts .under simulation of alternating current ,probe senses vortex in detected part. Any discontinuity or material properties that change vortex will be detected by probe,and be regarded as potential flaw。Over the years，probe technique and data processing has achieved continuous progress,at present,the vortex technique has been universally accepted as a fast、simple、accurate technique。This is exactly eddy current technique widely used in aviation、automobile、petrochemical engineering as well as power generation，detecting aluminum、stainless steel 、copper、titanium、brass、uniloy alloy,even carbon steel and other surface or near surface flaw。
Simple and reliable detecting technique，used for detecting flaw on conducting material surface or near surface
Using high speed revolution scanner and probe to detect workpiece
Vortex probe
Olympus NDT standard vortex probe has following types
Bolt hole probe
Surface probe with many kinds of shapes and configurations
Low pass Spot and Ring probe
Sliding probe
Wheel probe
Special probe used for special application
The probe shape used by Vortex detecting can be changeable，so as to be suitable for special application
Under selected frequency,using alternating current of probe to produce magnetic field around the probe
When coil is close to conductive material ,the material will produce induced vortex
If flaw in conductive material disturbs vortex ,the magnetic coupling of probe will be changed，by analyzing impedance change of measuring coil we can read flaw signal
Vortex software
Impedance planar graph and band chart display
User can choose the duration of the screen
Reference signal can coverage diagram can be kept on the screen，so as to be convenient to read signal
Under freeze mode ,we can rotate signal or make gain adjustment，and we don’t have to make probe fixed on the workpiece
Zoom and the best page display adjustment function
Connecting many kinds of scanner
With impedance planar graph and band chart or real time AC scanning imaging display
Multiple-frequency operation and automatic mixing ability
Up to eight frequency operation (1 channel: 8 frequency:2 channels:4 frequency:2 frequency)
Automatic mixing ability
High-ranking real time data processing
3 alarms that can be defined as different shapes ,can activate indicating light、buzzer or TTL output
High pass 、low pass and special filter
User can choose alarm (sector、 rectangle、annular )
Simple and fast to set
Alarm output can be totally controlled
Vortex report
Simple and fast t o create report
HTML report form has great flexibility，can be transferred by email,and watched on every Web browser
Predefine and customized report
Channel number 1-4 channel
Probe identification and setting
Generator
Number of generator is 1
Biggest voltage :12 Vp-p，10 Ω
Working frequency 20 Hz～6 MHz
Band width 8 Hz～5 kHz, simultaneous in inverse proportion
Receiver
Number of receiver is 1 to 4
Biggest input signal 1Vp-p
Gain 28db～68 dB
Data collecting
Digital frequency 40 MHz
Gathering rate is 1 Hz～15 kHz,(single coil )。 The rate can be restricted by instrument processing ability，or restricted by multiple channel stimulating modes delayed setting
A/D resolution 16bit
Data processing
Phase rotation 0°～359°，stepping is 0.1°
Filtering FIR low pass、FIR high pass、FIR band pass、FIR band stop ( cut off frequency can be changeable)、median filter (change between 2 to 200)、averaging filter (change between 2 to 200)
Channel processing mixture
The biggest document capability depends on internal flash size ：180 MB（or 300 MB，optional）
Data synchronism
Inner clock 1 Hz～15 kHz（single）
Encoder uniaxial or biaxial
Alarm
Alarm area shapes has sector、obsequent sector、frame and annular
Output types include video、audio frequency and TTL signal
Analog output 1 (X or Y)
Working temperature ：-15~55℃
Saving temperature：-20~60℃
Relative humidity:not exceed 85%
Working voltage：AV220V/DC24V
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