DXHC10-30 One-Dimensional DC Helmholtz Coil: Quality Inspection Report
1. Product Overview
1.1 Specifications
Model: DXHC10-30
Dimensions: 260mm (L) × 185mm (W) × 256mm (H)
Coil Spacing: 54mm
Coil Inner Diameter: 148mm
Coil Outer Diameter: 244mm
Weight: 11.29kg
1.2 Inspection Objectives
(1) Verify product performance against technical specifications.
(2) Evaluate consistency between design parameters and measured data.
(3) Establish baseline quality standards for factory release and post-sales reference.
2. Testing Environment
Ambient Temperature: 18.0°C
Initial Product Temperature: 18.0°C
Lead Wire Length: 3m
Ambient Magnetic Field: 0–30,000 nT
Test Date: November 10, 2024
3. Magnetic Performance Testing
3.1 Equipment
DX-F2031 Power Supply
DX-180 Gauss Meter
DXACP Power Amplifier
3.2 Magnetic Field Strength
| Current (A) | Operating Voltage (V) | Magnetic Field Strength (Gs) |
|---|---|---|
| 1 | – | 51.289 |
| 2 | 31.83 | 102.729 |
3.3 Magnetic Field Uniformity (2A Current)
| Test Area | Max Field (Gs) | Min Field (Gs) | Uniformity |
|---|---|---|---|
| Sφ50mm Sphere | 102.518 | 102.357 | -0.36% |
4. Electrical Performance Testing
4.1 Equipment
Digital Multimeter
Impedance Analyzer
4.2 Resistance Characteristics
| Temperature | Calibrated Resistance |
|---|---|
| @20°C | 15.866 Ω |
| @85°C | 20.610 Ω |
4.3 Inductance & Impedance (5V Test Level)
| Parameter | Min Value | Frequency | Max Value | Frequency |
|---|---|---|---|---|
| Inductance Ls | 37.2005 mH | 1 kHz | 104.968 mH | 20 Hz |
| Impedance Z | 28.9889 Ω | 20 Hz | 245.268 Ω | 1 kHz |
5. Temperature Rise Test
| Condition | Initial Value | Final Value |
|---|---|---|
| Operating Current | 2 A | Maintained at 2 A |
| Duration | – | 30 minutes |
| Voltage | 31.62 V | 33.85 V |
| Temperature | 18.0°C | <85°C |
6. Conclusion
The DXHC10-30 Helmholtz Coil meets all design requirements:
Magnetic Performance:
Achieved a uniformity of -0.36% within a 50mm spherical region under 2A current.
Electrical Characteristics:
Resistance temperature coefficients align with expectations.
Inductance-impedance curves exhibit normal behavior.
Thermal Stability:
Temperature rise remained below safety thresholds after 30 minutes of full-load operation.
This report serves as the official certification of product quality. Subsequent performance evaluations shall reference this document.
Note: All tests were conducted in an ISO/IEC 17025 certified laboratory environment. Testing equipment is annually calibrated by the National Institute of Metrology.