Continuous operation
The nominal coil current is 30 A continuous. The specified nominal magnetic field is 1288 A/m continuous. Field values apply at the stated reference spacing.
HHS 5204-12 - DC - 500 kHz, Circular Helmholtz Coils
Circular Helmholtz Coils
Precisely defined magnetic fields. DC - 500 kHz.
The Schwarzbeck HHS 5204-12 generates defined magnetic fields from DC to 500 kHz. Its 12-turn coils provide a calculable relationship between drive current and magnetic field strength.
Data Sheet
SPECIFICATIONS
DC - 500 kHzUsable frequency range
30 AContinuous nominal coil current
12 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 60 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 | 12 |
|---|---|
| Maximum Coil Current | 60 A (5 min.) |
| Nominal Coil Current | 30 A continuous |
| Coil Spacings | 200 mm, 250 mm, 300 mm |
| Max. Magn. Field Strength | 2500 A/m (5 min.) |
| Nominal Magn. Field Strength | 1288 A/m continuous |
| Magn. Field Strength, 1 A Coil Current | 42.93 A/m; 152.66 dBµA/m |
| Conversion Current->Fieldstrength | 32.66 dB/m |
| Coil Diameter | 400 mm |
| Mechanical Dimensions | 0.38 m x 0.58 m x 0.42 m |
| Terminals | 4 mm female |
| Inductance (Single Coil) | 120 µH |
| Inductance (Coil Pair) | 240–260 µH |
| Usable Frequency Range | DC - 500 kHz |
| Resonance Frequency | >1.4 MHz |
| Weight | 10.2 kg |
| Reference spacing for field values | 200 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 5204-12 in the United States, Mexico and Canada.
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