TM9300 Fluxgate Magnetometer Calibration Device
*Reference only
1. Summary
TM9300 is a high-precision fluxgate magnetometer calibration device. It consists of a DC current standard source, a three-axis Helmholtz coil, a magnetic shielded cylinder, a three-axis flux gate precision magnetometer, and automatic calibration software. TM9300 is suitable for calibrating single-axis and three-axis fluxgate magnetometers; it is suitable for metrology laboratories to establish weak magnetic field strength measurement and testing standards; it is also suitable for various research institutes, universities, and enterprises to conduct electromagnetic interference simulation experiments and material magnetic testing experiment, etc.
Reference standard: JJF 1519-2015 "Fluxgate Magnetometer Calibration Specifications".
2. Features
Equipped with a bipolar three-channel precision current source.
Three channels can output current synchronously or asynchronously.
The stability of the current source reaches 10 ppm/min.
The accuracy of the current source is 0.01%.
Annual error variation is better than 100 ppm.
Use triaxial Helmholtz coil as magnetic field generator
The single-axis coil can generate a standard magnetic field of up to 1000μT.
Equipped with a special magnetic shielded cylinder, the internal magnetic field after degaussing is < 2 nT.
The coil can be placed in a shielding cavity to shield the interference from environmental magnetic fields.
The system adopts modular integrated design.
Equipped with calibration software.
3. Application
| ☆ Calibrate Fluxgate Magnetometer |
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- DUT: single-axis/three-axis fluxgate magnetometer.
- Reference standard: JJF 1519-2015 "Fluxgate Magnetometer Calibration Specifications".
- Application: calibration of magnetometer magnetic induction intensity, noise, zero bias, and time drift, etc.,
|
4. Specifications
4.1 Three-Channel DC Current Standard Source
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- This current source is a bipolar three-channel precision DC current standard source.
- It can accurately output ±(0~500mA) DC current synchronously or asynchronously.
- The current source can be continuously adjusted through program control, and has a small adjustment fineness.
- The current output stability is better than 10 ppm/min, and the annual error change is better than 100 ppm.
|
| Specifications |
| Output Range |
± ( 0~500 mA ) |
| Adjust Fineness |
5 ppm*RG |
| Short Term Stability |
10 ppm/min |
| Measurement Uncertainty (K=2) |
0.006%*RD+ 0.004%*RG |
| Full Scale Linearity |
< 10 ppm |
| Annual Error Change |
< 100 ppm |
| Single Channel Maximum Load Voltage |
20 V |
| Protective Function |
open circuit protection, overload protection functions |
| Power Supply |
AC ( 220 ± 22 ) V,( 50 ± 2 ) Hz |
| Note: RD is the reading value, RG is the range vaule. |
4.2 Triaxial Helmholtz Coil
|
|
- The coil can be excited by a high-precision DC standard current source.
- Each axis can generate a maximum standard magnetic field of ± 1000 μT.
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| Specifications |
| Excitation Current |
± ( 5 mA~500 mA ) |
| Maximum Magnetic Field (Single Axis) |
± 1000 μT |
| Maximum Resultant Vector Magnetic Field |
±1732 μT |
| Magnetic Field Uniformity |
Uniform field within 10 mm is better than 100 ppm |
| Magnetic Field Linearity |
The magnetic field is proportional to the excitation current and has good linearity. |
| Temperature Influence |
The coil constant K changes little with temperature, minimizing the influence of temperature. |
| Inner Hole Diameter |
170 mm |
| Maximum Diameter |
250 mm |
4.3 TM4830B Fluxgate Magnetometer
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- TM4830B is a high-precision three-axis fluxgate magnetometer.
- Equipped with a high-precision fluxgate probe with a 100μT range
- Suitable for measuring the magnetic remanence and environmental magnetic field of magnetic shielded cylinders.
- It can form a closed loop with the magnetic field generation system and realize feedback control through measured values.
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| Specifications |
| Single Axis Measuring Range |
0~± 100 μT |
| Resolution |
0.01nT |
| Optimal Measurement Uncertainty (K=2) |
0.2% |
| Linearity |
< 0.0015% |
| Frequency Response |
DC~3 kHz |
| Noise (Typical Specifications) |
6~10 pTrms /√Hz@1Hz |
| Note |
The above indicators are related to the probe configuration. |
4.4 TM2900 Magnetic Shielded Cylinder
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- The inner frame is made of multi-layer coaxial high-permeability alloy.
- The large range of the central area in the hole can be regarded as zero magnetic field.
- Can be used for the research and development, testing and calibration of weak magnetic instruments.
|
| Specifications |
Residual Magnetism
(After Degaussing) |
2 nT |
| Attenuation |
-80 dB |
| Inner Hole Size |
Approx Ф300 mm × 1000 mm |
| Size |
Approx Ф600 mm × 1000 mm |
| Operating Temperature |
-20ºC~70ºC |
| Note |
A demagnetizer can be used to demagnetize the shielded cylinder before testing for better shielding. |
5. General Specifications
| Power Supply |
AC ( 220 ± 22 ) V, ( 50 ± 2 ) Hz |
| Temperature Performance |
Working temperature: 0°C~50°C;
Storage temperature: -20°C~70°C |
| Humidity Performance |
Working humidity: 40%~80% R·H; non-condensing
Storage humidity: < 80% R·H; non-condensing |
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