HHS 5206-8 – Circular Helmholtz Coil

HHS 5206 – Circular Helmholtz Coils
HHS 5206-8 – Circular Helmholtz Coils with 8 turns
The Schwarzbeck HHS 5206-8 Circular Helmholtz Coils are designed to generate precise magnetic fields from DC up to 800 kHz, with a resonance frequency exceeding 1500 kHz. Featuring 8 turns, these coils offer superior performance with a maximum magnetic field strength of 1060 A/m for short durations and 650 A/m continuously. This model stands out for its ability to handle high currents, making it ideal for demanding applications such as magnetic immunity testing according to automotive standards and MIL-STD 461.

The HHS 5206-8 is particularly suited for calibrating magnetic field probes and sensors. Its high temperature-proof Teflon-coated wire ensures durability and reliability, while the linear relationship between coil current and magnetic field strength allows for precise field strength calculations. The coils can accommodate a maximum cubic Device Under Test (DuT) size of 32.5 x 32.5 x 32.5 cm, providing versatility for various testing setups.

This model also supports the NFCN 9732 85 kHz compensation network, which reduces total impedance and allows continuous currents up to 15 Arms at operating frequencies of 80-90 kHz, making it ideal for immunity test inductive charging at 85 kHz. The HHS 5206-8’s robust design and easy installation process make it an excellent choice for high-precision magnetic field generation and calibration. Special care should be taken by individuals with magnetic-field-sensitive implants when using this device.

Number of turns:8
Maximum Coil Current:55 A (5 min.)
Nominal Coil Current:34 A continuous
Coil Spacings (centered):300 mm
Max. Magn. Field Strength:1060 A/m (5 min.)
Nominal Magn. Field Strength:650 A/m continuous
Magn. Field Strength, 1 A Coil Current:19.23 A/m;
145.68 dBµA/m
Coil Diameter:600 mm
Max. Cubical shaped DuT:32.5 x 32.5 x 32.5 cm
Mechanical Dimensions:0.64 m x 0.79 m x 0.42 m
Terminals:4 mm female
Inductance (Single Coil):91 µH
Inductance (Coil Pair):200 µH
Usable Frequency Range:DC – 800 kHz
Resonance Frequency:> 1500 kHz
Weight:17.0 kg
Recommended accessories:NFCN 9732 85 kHz

Datasheet HHS 5206-8

Recommended accessories:

  • The compensation network NFCN 9732 85 kHz consists of a high current / high voltage variable capacitor.
    The compensation capacitor reduces the total impedance of the series circuitry consisting of the Helmholtz coil HHS 5206-8 and the NFCN 9732 85 kHz at the operating frequency band of 80-90 kHz. It allows continuous currents of up to 15 Arms at generator voltages of less than 40 Vrms.
    Application: Immunity test inductive charging 85 kHz
    Datasheet NFCN 9732 85kHz