Performance Evaluation Report for Triaxial Helmholtz Coil System
1. Overview
This document assesses the operational compliance and technical specifications of a three-axis magnetic field generation device. The analysis validates design parameters, verifies adherence to performance criteria, and establishes baseline data for quality assurance and post-sales support.
2. Product Details
- Device: Triaxial Helmholtz Coil
- Model: 3DXHC10-100
- Evaluation Date: August 31, 2023
3. Test Conditions
Testing mimicked real-world operational settings, accounting for variables such as ambient temperature, cable length, and geomagnetic stability. Instruments were preheated, and environmental parameters were recorded (Table 1).
Table 1: Environmental Parameters
| Parameter | Value |
|---|---|
| Ambient Temperature | 22.0°C |
| Device Initial Temp | 22.0°C |
| Cable Length | 4m |
| Background Field | 0–30,000 nT |
4. Field Characterization
4.1 Equipment
- Power Supply: DX-F2031
- Amplifier: DXACP
- Magnetometer: DX-180
4.2 Field Intensity
Central field measurements were recorded under DC and AC excitation (Table 2).
Table 2: Field Output
| Axis | Mode | Current (A) | Voltage (V) | Field (Gs) |
|---|---|---|---|---|
| X | DC | 8.5 | 51.4 | 110.839 |
| Y | DC | 14.0 | 15.0 | 110.146 |
| Z | DC | 9.5 | 7.8 | 110.251 |
| Y | AC | 14.0 (20Hz) | 42.0 | 101.330 |
| Z | AC | 9.5 (50Hz) | 31.0 | 102.640 |
4.3 Spatial Uniformity
Field homogeneity was evaluated within a 50mm spherical volume (Table 3).
Table 3: Uniformity Analysis
| Axis | Max (Gs) | Min (Gs) | Deviation |
|---|---|---|---|
| X | 110.946 | 110.688 | -0.14% |
| Y | 110.134 | 109.998 | -0.13% |
| Z | 110.138 | 109.970 | -0.25% |
5. Electrical Characterization
5.1 Resistive Properties
Winding resistances were measured at 22°C and extrapolated to standard temperatures (Table 4).
Table 4: Coil Resistance
| Axis | R @22°C (Ω) | R @20°C (Ω) | R @85°C (Ω) |
|---|---|---|---|
| X | 5.770 | 5.717 | 7.427 |
| Y | 1.210 | 1.199 | 1.557 |
| Z | 0.820 | 0.813 | 1.055 |
5.2 Frequency-Dependent Behavior
Inductive reactance (Z) and inductance (Ls) were scanned from 20Hz–1kHz. Key metrics include:
X-Axis (Table 5):
- Ls: 230.187mH (min) to 233.043mH (max)
- Z: 29.88Ω (min) to 1.448kΩ (max)
Y-Axis (Table 7):
- Ls: 24.5819mH (min) to 24.7993mH (max)
- Z: 3.285Ω (min) to 154.495Ω (max)
Z-Axis (Table 9):
- Ls: 10.9104mH (min) to 10.9646mH (max)
- Z: 1.593Ω (min) to 68.574Ω (max)
Full frequency sweep data provided in Tables 6, 8, 10.
6. Conclusion
The system demonstrates compliance with specified magnetic field output (±0.25% uniformity), electrical parameters, and frequency response characteristics. All tested metrics align with technical requirements, confirming readiness for deployment. This report serves as the definitive performance reference for product validation.