JDFT-DI Magnetometer

JDFT-DI MagnetometerJDFT-DI Magnetometer is an integrated opto-mechanical-electrical absolute geomagnetic observation device.

Introduce

JDFT-DI Magnetometer

JDFT-DI Magnetometer is an integrated opto-mechanical-electrical absolute geomagnetic observation device. It supports multi-functional measurement in one unit, capable of observing both geomagnetic declination (D) and geomagnetic inclination (I). When cooperating with a proton magnetometer for total magnetic field intensity (F) measurement, it forms an ideal geomagnetic vector observation combination.

This magnetometer is applicable not only to fixed geomagnetic observatory stations but also to mobile field geomagnetic observation missions.

Featuring high observation accuracy, portable design, simple operation, stable and reliable working performance, the JDFT Series Fluxgate Theodolite is widely applied in geomagnetic scientific research, data collection, geomagnetic mapping, national defense, earthquake prediction, petroleum and mineral exploration, aviation and navigation orientation, and other fields for geomagnetic observation at fixed stations and field measuring points.
Product Model
The JDFT-DI Magnetometer includes two models with different measurement accuracies: 2‑second (JDFT‑2) and 6‑second(JDFT-6) .
Overview of Main Features
1. The optical unit adopts Orangelamp self-developed non-magnetic theodolite, available in 2-second and 6-second accuracy models. The magnetic field of any position of the theodolite within 1 cm from the probe direction is less than 1 nT.
2. The magnetometer unit adopts a single-axis fluxgate magnetometer with a high resolution of 0.1 nT.
3. The system features a simple structure, lightweight and portable design, suitable for both fixed station observation and field operation.

Technical Parameters
1. Theodolite: Self-developed non-magnetic theodolite by Orangelamp
2. Theodolite grade: Superior to DJ2
3. Maximum allowable error: ΔD≤±0.10′, ΔI≤±0.10′
4. Repeatability: DB≤0.10′, IB≤0.10′
5. Collimation error (turning difference): ΔD≤5′, ΔI≤5′
6. Minimum safe distance between detector and fluxgate sensor: 2.0 meters
7. Magnetic interference: Magnetic field interference is less than 1 nT at a position 1 cm away from the non-magnetic theodolite
8. Sensor calibration: Initial horizontal axis deviation: ＜45″;
Initial vertical axis deviation: ＜20″
9. Linearity: 0.3% (full scale)
10. Correction coefficient: 1.000±1%
11. Resolution: 0.1 nT
12. Dynamic range: -200 nT ～ 200 nT or higher
13. Horizontal included angle: ≤3′
14. Vertical included angle: ≤3′
15. Zero-field drift: Adjustable within ±20 nT
16. Display mode: Digital display
17. Power supply: AC/DC dual-purpose (DC12V, AC220V) with reverse connection protection; equipped with portable charger
18. Operating temperature range: -10℃~+40℃
19. Transportation compliance: The instrument meets the requirements of JB/T 9329 under guaranteed transportation conditions, with a free-fall drop height of 250 mm

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