Continuous operation
The nominal coil current is 33 A continuous. The specified nominal magnetic field is 1832 A/m continuous. Field values apply at the stated reference spacing.
HHS 5202-9 - DC - 2.5 MHz, Circular Helmholtz Coils
Circular Helmholtz Coils
Precisely defined magnetic fields. DC - 2.5 MHz.
The Schwarzbeck HHS 5202-9 generates defined magnetic fields from DC to 2.5 MHz. Its 9-turn coils provide a calculable relationship between drive current and magnetic field strength.
Data Sheet
SPECIFICATIONS
DC - 2.5 MHzUsable frequency range
33 AContinuous nominal coil current
9 turnsPer coil
Defined by geometry
A calculable field.
A traceable measurement.
Magnetic field strength is proportional to coil current. Coil geometry, the number of turns and the applied current determine the resulting field, allowing the field measurement to be traced to a current measurement or the voltage drop across a known resistor.
The field depends on coil spacing and the position within the test volume. Use the reference spacings in the specifications and the field distribution data in the datasheet when selecting your setup.
Plan your test setup
Match the field to your application.
Short-duration operation
The maximum coil current is 55 A (5 min.). Observe the stated time limit and provide adequate ventilation. The frequency range alone does not imply that maximum current or field is available at every frequency.
Technical details
Specifications
Product specifications with reference conditions. See the linked manufacturer datasheet for complete field distributions and operating guidance.
View the complete datasheet →| Number of turns | 9 |
|---|---|
| Maximum Coil Current | 55 A (5 min.) |
| Nominal Coil Current | 33 A continuous |
| Coil Spacings (centered) | 116 mm / 132 mm |
| Max. Magn. Field Strength | 3053 A/m (5 min.) |
| Nominal Magn. Field Strength | 1832 A/m continuous |
| Magn. Field Strength, 1 A Coil Current | 55.52 A/m; 154.89 dBµA/m |
| Coil Diameter | 232 mm |
| Mechanical Dimensions | 0.20 m x 0.25 m x 0.39 m |
| Max. cubical shaped DuT | 11.3 cm x 11.3 cm x 11.3 cm |
| Terminals | 4 mm female jacks; 7 mm screw terminals |
| Inductance (Single Coil) | 36 µH |
| Inductance (Coil Pair) | 80 µH |
| Usable Frequency Range | DC - 2.5 MHz |
| Resonance Frequency | > 3.5 MHz |
| Weight | 4.9 kg |
| Spacing for best uniformity / high field strength | 132 mm / 116 mm; field values refer to 116 mm |
Where specified, coil distances refer to the coil centers. Continuous and short-duration limits are listed separately. Standards references retain the designations used in the source documents.
Installation and operating safety
Read the supplied datasheet before use. Switch off the complete system before making or removing connections and do not touch terminals during operation. Observe all voltage, current and time limits. High currents heat the coils; maintain adequate air circulation. Keep unintended magnetic field sources and magnetic materials away from the test volume.
North American sales
Discuss your test requirements.
Contact Absolute EMC LLC for the HHS 5202-9 in the United States, Mexico and Canada.
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