- Bartington Instruments' HC2 Helmholtz Coil system is designed to generate stable and homogeneous magnetic fields in up to three axes. The system consists of HC2 Helmholtz Coils with a diameter of 1m, PA1 Power Amplifier and CU1 Control Unit (CU1). It interfaces with a PXI control system (or other compatible National Instruments acquisition card) enabling complete operation of the equipment. Each pair of coils generates a magnetic field in one specific axis - X, Y or Z. The use of CU2 Close Loop Unit enable active compensation of surrounding magnetic fields, and simplify setup of the system.
- The coil pairs generate a homogeneous magnetic field, up to ±250μT at DC and up to ±100μT at 300Hz. The 1 metre diameter HC2 allows for testing of large items, providing a homogeneous field to 1% in a volume of 14000cm3, and homogeneous to 0.1% in a volume of 2500cm3. A mounting table is provided to hold the test item inside the central homogeneous volume.
- The CU1 Control Unit connects to a National Instruments Data Acquisition card to provide control of the system from a Labview™-based software, whilst compensation potentiometers on the PA1 are used to cancel the local DC magnetic field.
- Calibration of three-axis magnetic field sensors.
- Creation of a known magnetic environment.
- Homogeneous field to 0.1% in a volume of 2500cm3.
- Orthogonality correction using PA1.
- Active compensation using CU2.
- Control software available.