Calibration unit Gauss Meter/Tesla Meter Calibration System

The Gauss/Tesla Meter Calibration System DXF Series is a complete calibration solution for magnetic field measurement instruments covering 0 mT–2.5 T. It combines a CNC magnetic-field generation platform, a factory-calibrated gaussmeter/teslameter, precision linear current sources, one-dimensional Helmholtz coils and a high-uniformity electromagnet to support both weak- and strong-field calibrations for laboratories and industrial quality departments.

Coverage and measurement ranges:

• Weak field: 0 mT – 10 mT (one-dimensional Helmholtz coil + 48 W linear current source) — Resolution: 0.0001 mT; Accuracy: 0.01%.
• Intermediate: 10 mT – 100 mT (one-dimensional Helmholtz coil + 1700 W linear current source) — Resolution: 0.001 mT; Accuracy: 0.01%.
• Strong field: 100 mT – 2.5 T (electromagnet + 1700 W linear current source) — Resolution: 0.001 mT; Accuracy: 0.05%.

Key features:

• High-precision CNC magnetic-field generation platform with dual electronic control for the reference probe and the device under test.
• System gaussmeter accuracy controlled within ±0.05% of reading; system resolution up to 1/600,000.
• Capable of calibrating DC magnetometers to Class 0.2 and better across 1 mT–2.5 T.
• Iron–cobalt pole electromagnet providing a 6 mm uniform zone with 0.01% uniformity for 3D teslameter checks.
• One-dimensional Helmholtz coils deliver up to 100 mT with uniformity to 0.01% within a 20 mm sphere for weak-field transverse/axial calibration.
• Coil constants calibrated against a PT2026 NMR teslameter with coil-constant accuracy to 0.007%.
• National-level traceability via the company's NMR teslameter enabling calibrations down to 0.001% (device-dependent).

Working principle:

• Strong-field calibration: the CNC platform controls a linear current source driving the electromagnet; the system gaussmeter reads the field and provides closed-loop feedback to the control software so the current is automatically adjusted to reach the target field. The system gaussmeter is factory-calibrated against a PT2026 NMR magnetometer.
• Weak-field calibration: axial fields are generated by a one-dimensional Helmholtz coil whose coil parameters and current-to-field relationship are factory-calibrated with a PT2026 NMR gaussmeter and provided as a selectable parameter table. Probes may be inserted radially (transverse) or axially for verification within ±100 mT.

System composition and main components:

• Gaussmeter
  • Range up to +30 T; reading resolution 0.0001 mT.
  • Accuracy up to ±0.05% in the 0.05 T–2.5 T range; temperature coefficient as low as 0.007%.
  • Supplied with a high-precision probe; factory-calibrated against PT-2026 NMR with available China National Institute of Metrology report.
• DXF2035 Power Supply
  • Current range ±10 A; voltage up to 170 V.
  • Resolution 0.1 mA (10 ppm of range); accuracy ±(0.01% set + 0.01% range) at 23°C.
  • Temperature coefficient <10 ppm/°C; short-term stability 10 ppm / 5 min; differential linearity typical 3 ppm.
• DXF2005 Power Supply
  • Current range ±1.2 A; resolution 10 μA (10 ppm).
  • Accuracy and stability similar to DXF2035 (±(0.01% set + 0.01% range), <10 ppm/°C; 10 ppm / 5 min).
• Helmholtz Coil
  • Axial field up to 100 mT with uniformity <100 ppm in a 20 mm diameter sphere; coil parameters factory-calibrated with PT2026.
  • Enables simultaneous axial and transverse probe calibration in the weak-field range.
• Electromagnet
  • Pole diameter 220 mm; large pole face 70 mm; pole spacing 10 mm for observation/operation.
  • 6 mm circular uniformity zone better than 0.03% and maximum field >2.5 T; open-type, natural cooling.
• Zero Gaussian Cavity
  • Imported YA-111 cavity providing a near-zero magnetic environment; shielding >0.0001 mT for repeatable zero-field benchmarks.
• Auxiliary clamping system
  • 8-axis adjustable fixture for precise angular alignment and concentric rotation; optional 360° turntable; supports 1D/2D/3D Hall sensors without re-clamping.
• Certificates
  • Gaussmeter calibration certificate; power supply calibration certificate; coil constant calibration; electromagnet calibration; NMR (PT-series) traceability documents.

Technical specifications:

• Measurement coverage: 0 mT–2.5 T (weak and strong field sections).
• Maximum system gaussmeter range: up to +30 T; resolution down to 0.0001 mT.
• Typical gaussmeter accuracy: ±0.05% (0.05 T–2.5 T); NMR-referenced calibrations to 0.001% where applicable.
• Helmholtz coil: max 100 mT; uniformity <100 ppm in 20 mm sphere.
• Electromagnet: >2.5 T max; 6 mm uniformity zone to 0.01% (iron–cobalt pole design).
• Power supplies: DXF2035 (±10 A, 170 V, 0.1 mA resolution, 10 ppm short-term stability); DXF2005 (±1.2 A, 10 μA resolution).
• Coil constant calibration traceable to PT2026 NMR; coil constant accuracy up to 0.007%.
• Zero-field shielding: YA-111 cavity, shielding >0.0001 mT.

Certifications:

• Factory and national traceability: PT2026 NMR reference calibrations and China National Institute of Metrology reports available for gaussmeter, power supplies and coil constants.