PIONEER OF MAGNETIC APPLIED INDUSTRIES

• Pole coil method has limited constraints on the shape of the object to be measured
• Conventional jacket (search) coil type can be used
• PC interface for filing measurement conditions and data
• Measurement data can be converted to CSV for use in Excel and other application software.

• Capable of generating high magnetic fields
  : up to 12 T (using special air-core coils) fully saturated with high magnetic fields
• Magnetic field strength specifications can be selected to match the magnet being measured
  : Ferrite magnets and rare earth sintered magnets are available.
• High speed measurement: 1 measurement per minute
• High performance: Repeatability ±1% or less
• Can be designed and manufactured according to sample dimensions
  : Standard sample dimensions φ10 L=7
• Basic operation is as easy as 6700BH
• Variable temperature measurement model added to lineup
  : temperature can be set up to 200°C

*PBH-1000 is manufactured in accordance with EMAS-7007 "Permanent Magnetic Field Measurement Method Using Pulse Magnetic Field" prepared by the Magnet Technology Committee of the Japan Electronics and Information Technology Industries Association.

• Capable of measuring a large-size magnet φ30
• Excitation field: 6 (T) max.
• Temperature test : 200 (°C) max.

Advantages over other methods

1. Electromagnetic saturation
Since abnormal attenuation may occur above about 1.2[T] (957.2[kA/m]) due to the magnetic saturation of the iron used in electromagnets, it is not suitable for the measurement of high-coercivity magnets such as NdFeB sintered.

2. Pulse Magnetic Field - Magnetic aftereffect
In the method using pulse magnetic field, a discontinuity appears in the B-H demagnetization curve for permanent magnets with a large magnetic aftereffect. This phenomenon is remarkable for NdFeB with HcJ less than 400 kA/m and SmCo-based sintered permanent magnet.

3. Large magnet - Eddy currents
In the method using pulse magnetic field, eddy currents are generated in magnets with high conductivity such as NdFeB magnets. Therefore, due to the skin effect, the magnetic flux is concentrated on the surface and does not penetrate into the interior of the magnets. Therefore, it is difficult to accurately measure large, highly conductive magnets.

Comparison of BH equipment

	Static magnetic field	Pulse	Superconducting
Main specification	Measurements are made by placing a magnet between electromagnets. Measure using a pole coil or jacket coil Measuring range: about 2.5T	Measurements are made using a pulsed power supply and an air-core coil. Jacket coil type Measuring range up to about 15T	Measurements are made using a superconducting magnet. Jacket coil type Usually measures at around 5T. In Japan, 45T superconducting coils also exist.
Correction of anti-magnetic field	Not required	Necessary	Necessary
Abnormal demagnetization	yes	no	no
NS switching	no	yes	yes
Eddy current	no	yes	no
Measurement time	2 to 5 minuites	1 to 3 minutes	5 to 15 minutes
Shape restriction	Pole coil method has few restrictions on the shape of the object to be measured	yes	yes
Disadvantages	Unable to measure high magnetic fields	Eddy currents are generated Correction of anti-magnetic field is required	Correction of anti-magnetic field is required

• Vibration of the sample at a constant amplitude and frequency enables small-sample, high-sensitivity measurements.
• No error due to integral drift and high accuracy measurement
• Simple sample setting system with rods that can be pulled out of the electromagnet
• Same condition setting skip function for high volume and lot measurement is supported. Automatically saves not only individual measurement data, but also characteristic value comparisons, waveform comparison images, etc.