ZC-9D

ZC-9D

AC/HWDC Electromagnetic Yoke

The light weight electromagnetic yoke is the ideal tool for detection of surface or sub-surface cracks and flaws in any ferromagnetic material. No other low cost, portable euqipment offers such versatility in Magnetic Particle Inspection

Fast and simple to operate, it is widely used with either dry or wet method fluorescent or non- fluorescent magnetic powders, in the testing of welds, automotive or railroad components, machine parts, steel and grey iron castings, forgings and in plan inspection, maintenance and repair.

Technical Specifications

  • Input supply – 220V, 50Hz, 1 Ph
  • Input current – 2 Amps
  • Distance across poles – 0 to 300 mm
  • Magnetic field AC – Constant level, DC-Pulsed, infinitely variable.
  • Lifting power Approx. 27 Kg. at 100mm spacing HWDC mode.
  • Yoke Weight 3.5 Kgs approx.
  • Controls On/Off Switch, AC/DC Switch, DC Field intensity potentiometer

AC Electromagnetic Yoke

  • Choice of constant level AC or variable intensity, pulsed HWDC for surface or sub-surgace flaw detectability.
  • Solid state circuity for infinitely variable (stepless) potentiometric adjustment of DC magnetic field.
  • Articulated legs to suit differing component contours.
  • Interpole distance adjustable from 0 to 300 mm.
  • Low power consumption. Current draw at 220V, 1 Phase supply – only 2Amps.
  • Extremely strong and intense magnetic field for superior sensitvity.
  • Portable & light weight – only 3.5 Kgs.
  • Can be used for AC Demagnetisation too.
  • No risk of sparking or ‘hot spots’ on the job.
  • No current flows through the component being tested.

Principles of Operation:

When the yoke is energised, an intense magnetic field is created between the legs. This field can best be described as a multiplicity of invisible line of magnetic force extending across the gap between the legs.As the yoke is applied to the ferromagnetic component, the magnetic circuit is closed and the field enters the part making its passage between the legs at and below the surface. A crack across this field cuts the magnetic circuit, the crack sides become opposite poles of a magnet and a leakage field occurs in the air above the crack. Mangetic Particles are attracted by this leakage field and indicate the location of the flaw.

A.C. Magnetisation

D.C. (Pulsed) Magnetisation

  • Creates a surface field which only detects surface cracks.
  • Particularly useful for inspecting thick and irregular sections for surface defects such as fatigue cracks.

Use of Half Wave D.C. Magnetisation creates a pulsing magnetic field with penetrates the work piece and detects surface and subsurface (Slightly) cracks. Pulsing improves particle mobility and sensitivity. Can be used for dry and even wet method.

Product Properties

Applications

Approvals / Confirms

  • NDT Type: Magnetic Particle Testing

Ideal Application: Demanding environments, Field testing, In-service inspections, Spot inspections, Weld inspection

Defect Examples: Fatigue cracks, Grinding cracks, Inclusions, Laps, Quenching cracks, Seams, Shrink cracks, Tears, Welding slag

  • ASME BPVC
  • ASTM E1444
  • ASTM E709

A.C. Magnetisation

  • Creates a surface field which only detects surface cracks.
  • Particularly useful for inspecting thick and irregular sections for surface defects such as fatigue cracks.

D.C. (Pulsed) Magnetisation

Use of Half Wave D.C. Magnetisation creates a pulsing magnetic field with penetrates the work piece and detects surface and subsurface (Slightly) cracks. Pulsing improves particle mobility and sensitivity. Can be used for dry and even wet method.

Product Properties

  • NDT Type: Magnetic Particle Testing

Applications

Ideal Application: Demanding environments, Field testing, In-service inspections, Spot inspections, Weld inspection

Defect Examples: Fatigue cracks, Grinding cracks, Inclusions, Laps, Quenching cracks, Seams, Shrink cracks, Tears, Welding slag

Approvals / Confirms

  • ASME BPVC
  • ASTM E1444
  • ASTM E709

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