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Permanent Magnet Material Testing System

Description：SeeweTek Permanent Magnet Material Testing System is a magnetic property measurement instrument designed to test standard samples with intrinsic coercivity below 1900 kA/m, in compliance with national standard GB/T 3217-2013 and international standard IEC 60404-5. An optional temperature rise unit enables measurements at room temperature up to 200°C for permanent magnet materials in various shapes including cylinders, blocks, rings, and tiles.

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Magnetic Material Measurement

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SeeweTek Permanent Magnet Material Testing System is a magnetic property measurement instrument designed to test standard samples with intrinsic coercivity below 1900 kA/m, in compliance with national standard GB/T 3217-2013 and international standard IEC 60404-5. An optional temperature rise unit enables measurements at room temperature up to 200°C for permanent magnet materials in various shapes including cylinders, blocks, rings, and tiles.

Product Features:

High accuracy and repeatability
Bilingual Chinese/English user interface for ease of use
Direct input of geometric dimensions based on sample shape
Automatic nonlinear correction of Hall probe
Automatic flux drift correction
Real-time display of H/B sampling waveforms during magnetization and testing
Includes magnetization curve, recoil permeability, and magnetic field calibration functions
Displays B&J-H hysteresis loops and magnetization curves, with automatic saving of test results
Allows comparison of J-H demagnetization curve clusters under different grades or temperature conditions
Test reports with print preview and automatic matching print output

Applicable Standards:

GB/T 3217-2013 Test methods for magnetic properties of permanent magnet (hard magnetic) materials
GB/T 24270-2009 Method for measurement of temperature coefficient of magnetic properties of permanent magnetic materials
IEC 60404-5 Magnetic materials - Part 5: Methods of measurement of magnetic properties of permanent magnet (hard magnetic) materials

Magnetizing Power Supply

Model	Type 140	Type 200	Type 250	Type 300
Output Power	2 kW	4 kW	8 kW	16 kW
Power Supply	Single-phase 220 V, 50 Hz	Three-phase 380 V, 50 Hz
Output Voltage	±100 V	±120 V	±150 V	±200 V
Output Current	±20 A	±40 A	±60 A	±80 A
Stability	0.05%, overvoltage, overcurrent, short-circuit protection, operating environment: 0-40°C, 40-80% RH, non-condensing

Fluxmeter Technical Parameters (for measurement of H and J in rare earth permanent magnets)

Analog output per range	0 to ±5 V
Input impedance	10 kΩ
Error	0.5%
Drift	1 μWb/60 s
Range	2.5, 5, 10, 20 mWb (auto-ranging; range automatically calculated based on material type and geometry)
Drift adjustment	Manual

Gaussmeter Technical Parameters (for measurement of H in general permanent magnets)

Analog output per range	0 to ±5 V
Hall element temperature coefficient	0.06%/°C
Software calibration accuracy	Better than 0.3%
Imported Hall chip probe (linear correction range)	0 to 2.5 T
Range	0.5/1.0/2.0/4.0 T
Error	0.5%
Resolution	1 mT
Linearity	±0.2% (computer corrected)
Display	4 1/2 digit LED
*The Hall probe maintains horizontal level during vertical and horizontal movement.

Heating Power Supply (Optional)

Control range	50 to 220°C
Temperature sensors	2
Resolution	1°C
Heating rods	100 W, 4 pcs
Temperature uncertainty	±1°C
Heating power input	220 V/5 A
Heating power output	400 VA
Other non-standard accessories can be customized.

Data Acquisition Card

Magnetization time	30 to 120 seconds (user-selectable based on proficiency)
Resolution and linearity	16 Bit ±1/2 LSB; sampling frequency: 110 kHz
AD samples H and B from gaussmeter and fluxmeter analog outputs respectively.
Conversion time between B and H: < 25 μs, synchronization effect negligible; software determines Ba and Ha.

Electromagnet Parameters

Model	DCT-140	DCT-200	DCT-250
Pole diameter	140 mm	200 mm	250 mm
Pole face (reduced)	100 mm	60 mm	80 mm
Adjustable gap	60 mm	80 mm	80 mm
Resistance	≤ 5 Ω	≤ 3 Ω	≤ 2.5 Ω
Weight	≈ 200 kg	≈ 800 kg	≈ 1400 kg
*Note: Choose different electromagnets based on sample size or coercivity; SeewTek offers electromagnet customization and magnetic field simulation services.

Measurement Accuracy:

Parameter	Br	HcB	HcJ	(BH)max	Hk	Hmax
Uncertainty (%)	1.0	1.0	1.5	2.0	1.0	1.0
Repeatability (%)	±0.3	±0.3	±0.3	±0.5	±0.5	±0.5
Note: Measurement accuracy traceable to national accredited laboratory samples. Standard AlNiCo sample tested at constant temperature 23°C.