DXHC11-250 One-dimensional Helmholtz Coil: Quality Inspection Report

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DXHC11-250 One-dimensional Helmholtz Coil p1 DXHC11-250 One-dimensional Helmholtz Coil p2 DXHC11-250 One-dimensional Helmholtz Coil p3

 

Overall Dimensions: 300mm(L) x 215mm(W) x 305mm(H)

Weight: 22.7kg

 

 

Performance test report
 Introduction
    1. Test purpose
Through the analysis of the test results, the evaluation of the product performance is obtained;
Evaluate whether the test product meets the technical requirements;
Provide reference data for product design and after-sales service, and provide a strong basis for leaving the factory.
    2. Basic information
 Product Name:
One-dimensional Helmholtz coil		 Product model: DXHC11-250
Test time: July 7, 2026
    3. Testing environment
The detection environment is closer to the actual environmental conditions used by the user, including factors such as lead wire length and ambient temperature. The time is selected in the time interval where the fluctuation of the geomagnetic field is small. Before the test, the instruments required for the test were turned on and warmed up in advance and the measurement environment was recorded, as shown in Table 1.
Measurement environment
Environment
temperature		 Product initial
temperature		 Lead length Environmental
magnetic field
20.0℃ 20.0℃ - 0~30000nT
Table 1: Measurement environment data
　
Magnetic field parameter test
    1. Using the device
DX-F2031 power supply
DX-180 Gauss Meter
DXACP Power Amplifier
    2. Magnetic field measurement
This product uses the following measurement methods:
Fixed-point measurement: measure the magnetic field at the target point
Magnetic field strength
No. Display current (A) Display voltage (V) Magnetic field
strength（Gs）
1 1 7.98 55.439
2 2 15.98 110.894
3 3 23.97 166.286
4 4 31.98 221.642
5 5 40.01 277.334
Table 2: Magnetic field strength data
 
Magnetic field uniformity
No. Measurement area Current

Central

magnetic field

Maximum

magnetic field

Minimum

magnetic field

 Uniformity
1 Sф55mm 5A 277.334Gs 277.334Gs 276.095Gs -0.45%
Coordinates Magnetic Field Strength (Gs)
(0,0,0) 277.334
(27.5,0,0) 276.754
(-27.5,0,0) 276.704
(0,27.5,0) 276.463
(0,-27.5,0) 276.226
(0,0,27.5) 276.288
(0,0,-27.5) 276.095
Table 3: Uniformity data
　
Electrical parameter test
    1. Using equipment
Digital multimeter
Impedance analyzer
    2. Test method
The digital instrument with bridge circuit and voltammetry is used for measurement. The measurement results are shown in the table below.
Resistance R measurement
Environment temp Product temperature Measuring resistance ResistanceR@20℃ ResistanceR@85℃
20.0℃ 20.0℃ 7.980Ω 7.980Ω 10.366Ω
Table 4: Resistance R data
　
Inductance Ls, reactance Z measurement (test level 5V)
Ls MIN[H] FREQ[Hz] Ls MAX[H] FREQ[Hz]
 277.010m 461  278.373m 20
Z  MIN[Ω] FREQ[Hz] Z  MAX[Ω] FREQ[Hz]
35.8794 20  1.74791k  1.00000k
Table 5: Inductance Ls and reactance Z data
　
Inductance Ls, reactance Z-scan measurement
POINTS FREQ[Hz] Ls Z  POINTS FREQ[Hz] Ls Z 
1 20  278.373m 35.8794 102 514.9  277.043m 896.382
2 24.9  278.325m 44.2713 103 519.8  277.043m 904.914
3 29.8  278.265m 52.7139 104 524.7  277.043m 913.443
4 34.7  278.232m 61.1906 105 529.6  277.044m 921.976
5 39.6  278.187m 69.6831 106 534.5  277.043m 930.501
6 44.5  278.169m 78.1937 107 539.4  277.039m 939.02
7 49.4  278.139m 86.7101 108 544.3  277.046m 947.571
8 54.3  278.106m 95.2295 109 549.2  277.057m 956.141
9 59.2  278.081m 103.755 110 554.1  277.064m 964.693
10 64.1  278.038m 112.277 111 559  277.042m 973.147
11 69  278.006m 120.804 112 563.9  277.063m 981.75
12 73.9  277.964m 129.327 113 568.8  277.771m 992.813
13 78.8  277.940m 137.858 114 573.7  277.779m  1.00139k
14 83.7  277.913m 146.388 115 578.6  277.780m  1.00995k
15 88.6  277.893m 154.922 116 583.5  277.784m  1.01852k
16 93.5  277.855m 163.445 117 588.4  277.782m  1.02706k
17 98.4  277.837m 171.979 118 593.3  277.792m  1.03565k
18 103.3  277.803m 180.503 119 598.2  277.799m  1.04423k
19 108.2  277.764m 189.022 120 603.1  277.800m  1.05279k
20 113.1  277.759m 197.563 121 608  277.800m  1.06134k
21 118  277.729m 206.086 122 612.9  277.800m  1.06989k
22 122.9  277.710m 214.616 123 617.8  277.801m  1.07845k
23 127.8  277.684m 223.141 124 622.7  277.807m  1.08703k
24 132.7  277.660m 231.665 125 627.6  277.810m  1.09559k
25 137.6  277.648m 240.198 126 632.5  277.814m  1.10416k
26 142.5  277.626m 248.723 127 637.4  277.821m  1.11274k
27 147.4  277.583m 257.227 128 642.3  277.808m  1.12125k
28 152.3  277.557m 265.744 129 647.2  277.798m  1.12976k
29 157.2  277.561m 274.29 130 652.1  277.825m  1.13842k
30 162.1  277.537m 282.807 131 657  277.833m  1.14701k
31 167  277.534m 291.347 132 661.9  277.808m  1.15546k
32 171.9  277.504m 299.856 133 666.8  277.836m  1.16413k
33 176.8  277.489m 308.38 134 671.7  277.845m  1.17272k
34 181.7  277.444m 316.87 135 676.6  277.845m  1.18128k
35 186.6  277.430m 325.393 136 681.5  277.850m  1.18986k
36 191.5  277.402m 333.899 137 686.4  277.851m  1.19842k
37 196.4  277.409m 342.446 138 691.3  277.872m  1.20706k
38 201.3  277.385m 350.954 139 696.2  277.863m  1.21558k
39 206.2  277.382m 359.488 140 701.1  277.857m  1.22411k
40 211.1  277.379m 368.023 141 706  277.871m  1.23273k
41 216  277.357m 376.531 142 710.9  277.873m  1.24129k
42 220.9  277.346m 385.052 143 715.8  277.873m  1.24984k
43 225.8  277.334m 393.573 144 720.7  277.880m  1.25843k
44 230.7  277.321m 402.092 145 725.6  277.886m  1.26701k
45 235.6  277.321m 410.628 146 730.5  277.887m  1.27558k
46 240.5  277.305m 419.141 147 735.4  277.893m  1.28416k
47 245.4  277.288m 427.652 148 740.3  277.900m  1.29275k
48 250.3  277.253m 436.133 149 745.2  277.898m  1.30130k
49 255.2  277.277m 444.705 150 750.1  277.931m  1.31001k
50 260.1  277.255m 453.206 151 755  277.908m  1.31846k
51 265  277.259m 461.746 152 759.9  277.904m  1.32700k
52 269.9  277.235m 470.243 153 764.8  277.919m  1.33563k
53 274.8  277.235m 478.777 154 769.7  277.923m  1.34420k
54 279.7  277.227m 487.298 155 774.6  277.930m  1.35279k
55 284.6  277.226m 495.83 156 779.5  277.929m  1.36135k
56 289.5  277.230m 504.371 157 784.4  277.934m  1.36993k
57 294.4  277.210m 512.869 158 789.3  277.940m  1.37851k
58 299.3  277.204m 521.391 159 794.2  277.948m  1.38711k
59 304.2  277.190m 529.898 160 799.1  277.952m  1.39569k
60 309.1  277.180m 538.413 161 804  277.956m  1.40427k
61 314  277.163m 546.913 162 808.9  277.960m  1.41285k
62 318.9  277.160m 555.44 163 813.8  277.974m  1.42148k
63 323.8  277.152m 563.955 164 818.7  277.965m  1.42999k
64 328.7  277.138m 572.459 165 823.6  277.979m  1.43862k
65 333.6  277.140m 580.994 166 828.5  277.977m  1.44717k
66 338.5  277.155m 589.561 167 833.4  277.983m  1.45576k
67 343.4  277.119m 598.015 168 838.3  278.008m  1.46445k
68 348.3  277.102m 606.51 169 843.2  277.995m  1.47294k
69 353.2  277.076m 614.982 170 848.1  278.021m  1.48164k
70 358.1  277.074m 623.507 171 853  277.979m  1.48998k
71 363  277.065m 632.017 172 857.9  278.008m  1.49869k
72 367.9  277.051m 640.515 173 862.8  278.045m  1.50746k
73 372.8  277.063m 649.072 174 867.7  278.009m  1.51582k
74 377.7  277.049m 657.569 175 872.6  278.021m  1.52444k
75 382.6  277.046m 666.091 176 877.5  278.027m  1.53304k
76 387.5  277.053m 674.638 177 882.4  278.036m  1.54165k
77 392.4  277.043m 683.144 178 887.3  278.040m  1.55023k
78 397.3  277.032m 691.644 179 892.2  278.044m  1.55882k
79 402.2  277.040m 700.194 180 897.1  278.043m  1.56737k
80 407.1  277.037m 708.716 181 902  278.056m  1.57601k
81 412  277.035m 717.239 182 906.9  278.060m  1.58459k
82 416.9  277.036m 725.772 183 911.8  278.068m  1.59320k
83 421.8  277.031m 734.287 184 916.7  278.074m  1.60180k
84 426.7  277.031m 742.818 185 921.6  278.071m  1.61034k
85 431.6  277.033m 751.351 186 926.5  278.081m  1.61896k
86 436.5  277.045m 759.913 187 931.4  278.089m  1.62757k
87 441.4  277.017m 768.367 188 936.3  278.082m  1.63609k
88 446.3  277.019m 776.9 189 941.2  278.073m  1.64460k
89 451.2  277.040m 785.487 190 946.1  278.103m  1.65334k
90 456.1  277.028m 793.983 191 951  278.068m  1.66170k
91 461  277.010m 802.46 192 955.9  278.116m  1.67055k
92 465.9  277.046m 811.095 193 960.8  278.120m  1.67914k
93 470.8  277.037m 819.597 194 965.7  278.132m  1.68777k
94 475.7  277.033m 828.114 195 970.6  278.130m  1.69632k
95 480.6  277.032m 836.642 196 975.5  278.137m  1.70493k
96 485.5  277.036m 845.182 197 980.4  278.143m  1.71353k
97 490.4  277.022m 853.669 198 985.3  278.149m  1.72213k
98 495.3  277.039m 862.25 199 990.2  278.147m  1.73069k
99 500.2  277.037m 870.774 200 995.1  278.159m  1.73933k
100 505.1  277.036m 879.302 201  1.00000k  278.161m  1.74791k
101 510  277.036m 887.831   　 　 　
Table 6: Detailed frequency data of inductance Ls and reactance Z
 
Temperature Rise Test
 Test Methods
The following measurement methods are employed for this product:
Magnetic field temperature rise measurement: Determines the maximum operating time and peak temperature at the target magnetic field current required for user operation.
Maximum current temperature rise measurement: Determines the maximum operating time and peak temperature at the maximum safe current the product can withstand.
Data regarding temperature, time, and current for the coil assembly is measured. The results are presented in the table below.
Temperature Rise Test
Test Current [A] Duration [min] Product temperature [°C]
5 0 26.6
5 34.2
10 40.7
15 46.5
20 51.9
25 57.2
Note 　
Table 7: Data on the relationship between temperature, operating time, and current
 
Conclusion
The magnetic field and electrical performance of the product meet the requirements of the corresponding technical parameters. The final performance of the product is subject to this document.

 

Customization is available, please let us know your requirements, and we will design a professional plan for you. Thank you!

Dexinmag® • 2026

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