See Product Details

The magnetic shielding Lab Kit is highly effective in solving design problems of magnetic interference. (D.C. to 100 kilohertz). By adding CO-NETIC and NETIC layers until desired attenuation is achieved, minimum material requirements can be determined. This results in significant cost savings in the final design.

An important advantage of the "hands-on" shielding approach is that changes in a circuit layout, shield configuration, power levels and component orientation are easily evaluated. Each consideration is evaluated without reliance on theoretical formulas that are imprecise. The Lab Kit permits magnetic shields to be designed and modified until required performance is obtained. The prototype then serves as a model for production.

Lab Kit Contents

The Lab Kit provides a wide variety of CO-NETIC and NETIC alloys. The material included is Perfection Annealed and will not require re-annealing unless severe forming or heli-arc welding is performed.

1 - CO-NETIC AA Foil .002" x 4" x 15" / 0,051 x 101,6 x 381,0 mm
1 - CO-NETIC AA Foil .004" x 15" x 10" / 0,102 x 381,0 x 254,0 mm
1 - CO-NETIC AA Foil .010" x 15" x 10" / 0,254 x 381,0 x 254,0 mm
1 - CO-NETIC AA Alloy .025" x 15" x 10" / 0,635 x 381,0 x 254,0 mm
1 - CO-NETIC Braided Sleeving 1/2" I.D. x 1 FT. / 12,7 mm x 30,48 cm
2 - NETIC S3-6 Foil .004" x 15" x 10" / 0,102 x 381,0 x 254,0 mm
1 - NETIC S3-6 Alloy .030" x 15" x 10" / 0,762 x 381,0 x 254,0 mm
1 - roll Double-faced Pressure Sensitive Tape
1 - A.C. Magnetic Probe, Model EP-101A
1 - Product Information Binder

Magnetic Pickup Probe

The A.C. Magnetic Field Evaluator Probe furnished with the Lab Kit can be used with a DVM or oscilloscope. It will measure magnetic field intensities and the attenuation ratios of magnetic shields. The nominal probe output is 20 millivolts peak per Gauss at 60 Hertz. The probe is accurate for direct measurements from 10 Hertz to 3 kiloHertz. Above 3 kHz it should be used only for measuring relative intensities. Each probe is carefully calibrated with the calibration number shown on the probe label.

Magnetic Shield Design

THEORY:

For D.C. and low frequency A.C. magnetic fields, a magnetic shield provides a low reluctance magnetic path for the interference field. The shield attracts flux lines to itself and diverts the magnetic field away from the sensitive component. This principle is basic in determining the design of a magnetic shield.

SHAPE OF SHIELD:

The optimum shield is a closed, spherical configuration. In practice, effective shields can be cans, open-ended cylinders, five-sided boxes, U or L shaped brackets, and even flat plates. A flat plate is effective if both the length and width of the shield exceed the distance separating the source and receiver of interference.

Please click on the links to the right for more information.