The magnetic, handheld coil FESP 5132 was designed to generate defined magnetic field strength in the audio frequency range up to 100 kHz. The main application is immunity testing against magnetic fields according to EN 55103, IEC 61000-4-39 and MIL-STD-461 E. Depending on the current source characteristics magnetic fields up to 1500 A/m can be generated for a short time.

The generated magnetic field strength is proportional to the coil current. A distance ring allows a precise spacing of 50 mm between the coil and the EUT surface. Other distance rings can be used to scale the current-field strength ratio. The highest field-strength levels can be achieved using the shortest ring. There are further rings available on request in order to provide a certain scaling between coil current and magnetic field strength (e.g. 1 Amp coil current = 100 Amp/m field-strength).

Application:

The magnetic, handheld coil FESP 5132 was designed to generate defined magnetic field strength in the audio frequency range up to 100 kHz. The main application is immunity testing against magnetic fields according to EN 55103 and MIL-STD-461 E. Depending on the current source characteristics magnetic fields up to 1500 A/m can be generated for a short time. The generated magnetic field strength is proportional to the coil current. A distance ring allows a precise spacing of 50 mm between the coil and the EUT surface. Other distance rings can be used to scale the current-field strength ratio. The highest field strength levels can be achieved using the shortest ring. There are further rings available on request in order to provide a certain scaling between coil current and magnetic field strength (e.g. 1 Amp coil current = 100 Amp/m field strength). Economic current sources in the frequency range from 10 Hz up to 100 kHz are Audio amplifiers, which are available in nearly all power ratings. The main part of the generated magnetic field is perpendicular (orthogonal) to the EuT-surface, i.e. in the same direction as the 22 mm handle. The achievable accuracy for generating defined magnetic fields depends on the accuracy of current measurements. In some cases (with moderate field strength requirements) it may be advisable to use a well-known series resistor and measure the voltage across this resistor. The resistor can be scaled in a way to obtain a convenient voltage reading which corresponds to the generated magnetic field. The larger the series resistor compared to the inductance, the more frequency-independent characteristics will be achieved (but the efficiency of field strength reduces)

Specifications: 

Option:

Option LoopHolder50: Calibration fixture to hold FESP 5134-40 in FESP 5132 in a distance of 50 mm acc. MIL461E figure RS101-3 & IEC 61000-4-39