HHS 5218-100-2.5 is ideally suited for the calibration of magnetic field probes or sensors. Manufactured by Schwarzbeck and offered by Absolute EMC

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HHS 5218-100-2.5, DC - 3 kHz, Square Helmholtz Coils

Precisely defined magnetic fields. From DC to 3 kHz.

The Schwarzbeck HHS 5218-100-2.5 coil pair generates a magnetic field with a directly calculable relationship to coil current. Adjustable spacing lets you select the configuration for your field strength and homogeneity requirements.

PARTNER:

SCHWARZBECK MESS-ELEKTRONIK

MARKETS:

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TEST STANDARDS:

MIL-STD-461 ,

Data Sheet

SPECIFICATIONS

DC–3 kHzUsable frequency range

20 AContinuous nominal coil current

100 turnsPer coil

Defined by geometry

A calculable field.
A traceable measurement.

The field strength is determined by coil geometry, number of turns and current. This linear relationship allows magnetic field calibration to be traced to a current measurement, or to the voltage drop across a known resistor.

The datasheet describes the coil as generally serving as a primary standard. For independent field verification, use a loop sensor for AC fields or a Hall probe for DC and AC fields. A short connecting cable set is included.

Select your configuration

Balance field uniformity and strength.

1.00 m spacing

Specified for best homogeneity. The coil factor is 70.45 m?¹, producing 1,409 A/m continuously at 20 A. A current of approximately 1.42 A produces 100 A/m.

0.60 m spacing

The coil factor increases to 86.05 m?¹. At 40 A, the specified maximum field is approximately 3,442 A/m for up to 5 minutes.

All coil spacings are measured from coil center to coil center. The maximum current rating is 40 A for 5 minutes; the continuous nominal rating is 20 A.

Technical details

Specifications

Values reproduced from the HHS 5218-100-2.5 Rev. A datasheet.

View the complete datasheet →

Usable frequency range	0–3 kHz
Turns per coil	100
Nominal coil current	20 A continuous
Maximum coil current	40 A, maximum 5 minutes
Coil factor at 1.00 m / 0.60 m	70.45 / 86.05 m?¹
Best homogeneity spacing	1.00 m
Maximum coil separation	1.20 m
Outer dimensions	2.00 × 1.91 × 1.27 m
Average electrical side length	1.844 m
Inductance per coil	60.5 mH
Pair inductance at 0.90 m spacing	133 mH
Resistance per coil	2.5 Ω
Pair resonant frequency	>8 kHz
Weight	91 kg

Operating safety

Dangerous high voltages can occur at the HHS 5218-100-2.5 and NFCN 9732 during operation, exceeding the amplifier output voltage. Never touch terminals during operation. Switch off the complete system before making or removing connections. High current heats the coils: maintain sufficient air circulation and keep coil surfaces free of heat-insulating coverings. Read the full datasheet before use.

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