EMC Item no.: 313
  • DEF STAN 59-411
  • Antennas / Near Field Probes
  • Low Frequency Magnetic Field
  • EN-61000-4-8 : Magnetic Immunity
Test Mode: Immunity
Test Type: Radiated
Manufacturer: EMC Hire

Product description

Model 6403 90cm Helmholtz coil system has twin coils and is normally used as a magnetic field immunity test system. A magnetic field is produced by two coils that is essentially homogenous throughout the volume between the face of the coils and one-third diameter of the coils at it’s centre. The coils are supported by a non-metallic framework. A rotating, height-adjustable pedestal is capable of holding articles weighing up to 34kg. The Coil has been initially calibrated at the NPL in terms of uT/amp at 50Hz. For the end user’s convenience NPL have also quoted a figure of uTesla per millivolt as measured across an installed shunt resistor with measuring terminal placed at the base of the Helmholtz. This was done at 60Hz and 2kHz. Built in on the base is the feed connector.

General specification

Coil Diameter:                  90cm

Freqency range:                 DC to 2kHz

Coil Factor:                        118.7 uTesla/ampere

Homogeneity:                    ±5% within a 30cm cube

Coil Impedance:                 Approx. 0.5ohms DC;

Inductance:                       18.4 millihenrys

Self Resonance:                  18kHz

Max I Input:                       15 amps continuous