Customized One-dimensional Helmholtz Coil(Bmax=60mT@10min): Quality Inspection Report

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Customized One-dimensional Helmholtz Coil(Bmax=60mT@10min) P1 Customized One-dimensional Helmholtz Coil(Bmax=60mT@10min) P2 Customized One-dimensional Helmholtz Coil(Bmax=60mT@10min) P3

 

Overall Dimensions: 425mm(L) x 425mm(W) x 280mm(H)

Weight: 83.5kg

 

 

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: Customized
Test time: September 2nd, 2025
    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
25.0℃ 25.0℃ - 0~30000nT
Table 1 Measurement environment data
　
Magnetic field parameter test
    1. Using the device
DX-F2031 power supply
DX-360 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 Voltage (V) Magnetic field
strength（Gs）
One-dimensional Helmholtz coil 4 15.45 126.428
8 30.91 253.005
12 46.39 379.53
16 61.92 506.04
19.1 77.55 604.13
20 74.44 632.54
19.1 (Reverse connection) 74.44 0.235
Note: Connecting lines 2 and 3 in series constitutes a forward connection; connecting lines 2 and 4 in series constitutes a reverse connection.
Table 2 Magnetic field strength data
 
Magnetic field uniformity
No. Area Current Center(Gs) Max(Gs) Min(Gs) Uniformity
　 100*100*100mm 19.1A 605.28 650.21 550.24 -9.09331%
XYZ Magnetic field strength(Gs)
(0,0,0) 605.28
(50,0,0) 581.9
(-50,0,0) 583.84
(0,50,0) 582.34
(0,-50,0) 583.03
(50,50,0) 550.24
(-50,-50,0) 554.55
(50,-50,0) 550.75
(-50,50,0) 552.38
(0,0,50) 631.51
(50,0,50) 642.76
(-50,0,50) 642.25
(0,50,50) 643.68
(0,-50,50) 641.3
(50,50,50) 649.49
(-50,-50,50) 647.08
(50,-50,50) 646.46
(-50,50,0) 650.21
(0,0,-50) 631.45
(50,0,-50) 640.47
(-50,0,-50) 636.97
(0,50,-50) 638.58
(0,-50,-50) 639.03
(50,50,-50) 642.5
(-50,-50,-50) 641.69
(50,-50,-50) 646.61
(-50,50,-50) 641.13
Table 3 Uniformity data
　
Magnetic field gradient
No. Measurement area Measurement current 　
　 Axial 100 mm 19.1A
Axial coordinate Magnetic field strength (Gs) Gradient (T/m)
-50 266.541 0.533082
-40 218.992 0.54748
-30 167.433 0.55811
-20 113.054 0.56527
-10 56.89 0.5689
0 0.235 　
10 57.238 0.57238
20 113.362 0.56681
30 167.556 0.55852
40 218.89 0.547225
50 266.076 0.532152
Table 4 Magnetic field gradient 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℃
25.0℃ 25.0℃ 3.860Ω 3.773Ω 4.901Ω
Table 5 Resistance R data
　
Inductance Ls, reactance Z measurement (test level 5V)
Ls MIN[H] FREQ[Hz] Ls MAX[H] FREQ[Hz]
 47.4805m  1.00000k  83.3447m 20
Z  MIN[Ω] FREQ[Hz] Z  MAX[Ω] FREQ[Hz]
15.3282 20 310.183  1.00000k
Table 6 inductance Ls and reactance Z data
　
Inductance Ls, reactance Z-scan measurement
POINTS FREQ[Hz] Ls Z  POINTS FREQ[Hz] Ls Z 
1 20  83.3447m 15.3282 102 514.9  51.4225m 171.426
2 24.9  76.8324m 16.7742 103 519.8  51.3738m 172.899
3 29.8  72.6827m 18.2174 104 524.7  51.3253m 174.37
4 34.7  69.8059m 19.6723 105 529.6  51.2774m 175.841
5 39.6  67.6897m 21.144 106 534.5  51.2297m 177.309
6 44.5  66.0655m 22.6321 107 539.4  51.1821m 178.775
7 49.4  64.7755m 24.134 108 544.3  51.1346m 180.238
8 54.3  63.7366m 25.6524 109 549.2  51.0874m 181.701
9 59.2  62.8629m 27.1802 110 554.1  51.0407m 183.162
10 64.1  62.1232m 28.7175 111 559  50.9942m 184.622
11 69  61.4900m 30.2641 112 563.9  50.9478m 186.08
12 73.9  60.9469m 31.8224 113 568.8  50.9019m 187.538
13 78.8  60.4663m 33.386 114 573.7  50.8560m 188.992
14 83.7  60.0412m 34.9555 115 578.6  50.8107m 190.447
15 88.6  59.6617m 36.5306 116 583.5  50.7651m 191.898
16 93.5  59.3203m 38.1108 117 588.4  50.7201m 193.349
17 98.4  59.0087m 39.6948 118 593.3  50.6754m 194.798
18 103.3  58.7273m 41.2841 119 598.2  50.6308m 196.246
19 108.2  58.4697m 42.877 120 603.1  50.5867m 197.693
20 113.1  58.2328m 44.4731 121 608  50.5427m 199.138
21 118  58.0132m 46.0716 122 612.9  50.4988m 200.582
22 122.9  57.8093m 47.6724 123 617.8  50.4555m 202.025
23 127.8  57.6183m 49.2747 124 622.7  50.4120m 203.465
24 132.7  57.4397m 50.8789 125 627.6  50.3689m 204.905
25 137.6  57.2707m 52.4835 126 632.5  50.3260m 206.343
26 142.5  57.1107m 54.0888 127 637.4  50.2835m 207.78
27 147.4  56.9585m 55.6942 128 642.3  50.2409m 209.215
28 152.3  56.8146m 57.3005 129 647.2  50.1987m 210.65
29 157.2  56.6765m 58.9061 130 652.1  50.1564m 212.081
30 162.1  56.5444m 60.5115 131 657  50.1147m 213.513
31 167  56.4174m 62.1163 132 661.9  50.0728m 214.942
32 171.9  56.2958m 63.7214 133 666.8  50.0315m 216.372
33 176.8  56.1782m 65.3248 134 671.7  49.9901m 217.798
34 181.7  56.0644m 66.927 135 676.6  49.9488m 219.223
35 186.6  55.9544m 68.5284 136 681.5  49.9078m 220.648
36 191.5  55.8475m 70.1282 137 686.4  49.8669m 222.07
37 196.4  55.7434m 71.7266 138 691.3  49.8261m 223.491
38 201.3  55.6422m 73.3236 139 696.2  49.7855m 224.911
39 206.2  55.5429m 74.9185 140 701.1  49.7451m 226.329
40 211.1  55.4464m 76.512 141 706  49.7046m 227.745
41 216  55.3518m 78.1036 142 710.9  49.6647m 229.162
42 220.9  55.2592m 79.6934 143 715.8  49.6249m 230.576
43 225.8  55.1686m 81.2814 144 720.7  49.5851m 231.989
44 230.7  55.0795m 82.8671 145 725.6  49.5455m 233.401
45 235.6  54.9927m 84.4518 146 730.5  49.5059m 234.811
46 240.5  54.9067m 86.0332 147 735.4  49.4667m 236.22
47 245.4  54.8224m 87.613 148 740.3  49.4270m 237.625
48 250.3  54.7396m 89.1911 149 745.2  49.3881m 239.032
49 255.2  54.6586m 90.7674 150 750.1  49.3490m 240.436
50 260.1  54.5786m 92.3412 151 755  49.3101m 241.839
51 265  54.4998m 93.9128 152 759.9  49.2715m 243.241
52 269.9  54.4223m 95.4825 153 764.8  49.2329m 244.641
53 274.8  54.3458m 97.0502 154 769.7  49.1942m 246.039
54 279.7  54.2704m 98.6156 155 774.6  49.1559m 247.437
55 284.6  54.1955m 100.178 156 779.5  49.1178m 248.834
56 289.5  54.1220m 101.739 157 784.4  49.0796m 250.229
57 294.4  54.0496m 103.299 158 789.3  49.0413m 251.621
58 299.3  53.9782m 104.856 159 794.2  49.0034m 253.013
59 304.2  53.9089m 106.413 160 799.1  48.9658m 254.405
60 309.1  53.8392m 107.966 161 804  48.9279m 255.793
61 314  53.7701m 109.517 162 808.9  48.8904m 257.182
62 318.9  53.7022m 111.066 163 813.8  48.8526m 258.567
63 323.8  53.6344m 112.613 164 818.7  48.8151m 259.951
64 328.7  53.5677m 114.157 165 823.6  48.7780m 261.336
65 333.6  53.5017m 115.7 166 828.5  48.7404m 262.717
66 338.5  53.4361m 117.24 167 833.4  48.7032m 264.097
67 343.4  53.3714m 118.778 168 838.3  48.6664m 265.477
68 348.3  53.3072m 120.315 169 843.2  48.6293m 266.855
69 353.2  53.2438m 121.849 170 848.1  48.5924m 268.231
70 358.1  53.1812m 123.382 171 853  48.5555m 269.606
71 363  53.1187m 124.911 172 857.9  48.5190m 270.981
72 367.9  53.0568m 126.439 173 862.8  48.4821m 272.352
73 372.8  52.9959m 127.966 174 867.7  48.4455m 273.723
74 377.7  52.9353m 129.49 175 872.6  48.4090m 275.093
75 382.6  52.8752m 131.012 176 877.5  48.3727m 276.461
76 387.5  52.8156m 132.533 177 882.4  48.3363m 277.827
77 392.4  52.7566m 134.051 178 887.3  48.2998m 279.191
78 397.3  52.6982m 135.568 179 892.2  48.2638m 280.556
79 402.2  52.6399m 137.082 180 897.1  48.2275m 281.918
80 407.1  52.5826m 138.595 181 902  48.1915m 283.279
81 412  52.5254m 140.105 182 906.9  48.1553m 284.638
82 416.9  52.4689m 141.614 183 911.8  48.1193m 285.995
83 421.8  52.4125m 143.121 184 916.7  48.0836m 287.353
84 426.7  52.3568m 144.626 185 921.6  48.0477m 288.708
85 431.6  52.3016m 146.13 186 926.5  48.0120m 290.062
86 436.5  52.2468m 147.632 187 931.4  47.9761m 291.413
87 441.4  52.1924m 149.131 188 936.3  47.9404m 292.763
88 446.3  52.1382m 150.629 189 941.2  47.9050m 294.114
89 451.2  52.0849m 152.126 190 946.1  47.8693m 295.461
90 456.1  52.0317m 153.621 191 951  47.8338m 296.807
91 461  51.9789m 155.114 192 955.9  47.7984m 298.152
92 465.9  51.9267m 156.605 193 960.8  47.7622m 299.49
93 470.8  51.8745m 158.094 194 965.7  47.7266m 300.83
94 475.7  51.8230m 159.583 195 970.6  47.6915m 302.172
95 480.6  51.7719m 161.069 196 975.5  47.6562m 303.511
96 485.5  51.7207m 162.553 197 980.4  47.6210m 304.848
97 490.4  51.6702m 164.036 198 985.3  47.5859m 306.185
98 495.3  51.6199m 165.517 199 990.2  47.5509m 307.52
99 500.2  51.5703m 166.998 200 995.1  47.5160m 308.855
100 505.1  51.5206m 168.475 201  1.00000k  47.4805m 310.183
101 510  51.4713m 169.951 　 　 　 　
Table 7 Detailed frequency data of inductance Ls and reactance Z
 
Temperature Rise Test
    Testing Method
This product employs the following measurement methods:
Maximum Current Temperature Rise Measurement: Measure the product's maximum safe operating time and highest temperature under the maximum current it can withstand;
Measure the overall coil data regarding temperature, time, and current. The measurement results are shown in the table below.
Temperature Rise Test
Operating Current [A] Operating Time [min] Product Temperature [°C]
19.1 0 23.6
1 26.9
2 30.6
3 33.8
4 37.3
5 40.6
6 43.9
7 47.1
8 50.3
9 53.4
10 56.4
Note: 　
Table 8: 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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