DXHC30-50 1D Helmholtz Coil: Quality Inspection Report

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Overall Dimensions: 705mm x 466mm x 715mm
Coil spacing: 224mm
Inside diameter of coil: 507mm
Outside diameter of coil: 682mm
Weight: 124kg

 

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: DXHC30-50
Test time: Nov. 27th, 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
11.0℃ 11.0℃ - 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 Voltage (V) Magnetic field
strength（Gs）
1D Coil 1 3.85 11.09
2 7.69 21.9
3 11.52 32.76
4 15.37 43.6
5 19.2 54.52
4.7 18.04 51.14
Table 2 Magnetic field strength data
 
Magnetic field uniformity
No. Area Current Center Max Min Uniformity
1 Φ150mm 4.7A 51.14 51.14 50.92 -0.4302%
XYZ Magnetic field strength
(0,0,0) 51.14
(75,0,0) 51.1
(-75,0,0) 50.98
(0,75,0) 50.95
(0,-75,0) 50.92
(0,0,-75) 50.93
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℃
11.0℃ 11.0℃ 3.800Ω 3.964Ω 5.149Ω
Table 4 Resistance R data
　
Inductance Ls, reactance Z measurement (test level 5V)
Ls MIN[H] FREQ[Hz] Ls MAX[H] FREQ[Hz]
 34.1616m  1.00000k  60.9107m 20
Z  MIN[Ω] FREQ[Hz] Z  MAX[Ω] FREQ[Hz]
13.0819 20 228.999  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  60.9107m 13.0819 102 514.9  38.3421m 130.076
2 24.9  56.3587m 14.0003 103 519.8  38.2918m 131.157
3 29.8  53.6311m 14.9631 104 524.7  38.2410m 132.231
4 34.7  51.8881m 15.9927 105 529.6  38.1914m 133.305
5 39.6  50.5326m 17.0262 106 534.5  38.1408m 134.375
6 44.5  49.6519m 18.144 107 539.4  38.0914m 135.447
7 49.4  48.9413m 19.2584 108 544.3  38.0420m 136.515
8 54.3  48.3170m 20.4187 109 549.2  37.9926m 137.581
9 59.2  47.8099m 21.6047 110 554.1  37.9434m 138.646
10 64.1  47.3755m 22.7695 111 559  37.8937m 139.706
11 69  47.0017m 23.9667 112 563.9  37.8476m 140.775
12 73.9  46.6432m 25.1622 113 568.8  37.7987m 141.832
13 78.8  46.3674m 26.3875 114 573.7  37.7512m 142.893
14 83.7  46.0894m 27.6068 115 578.6  37.7057m 143.959
15 88.6  45.8467m 28.8415 116 583.5  37.6582m 145.013
16 93.5  45.5996m 30.053 117 588.4  37.6086m 146.064
17 98.4  45.3928m 31.2896 118 593.3  37.5609m 147.105
18 103.3  45.1818m 32.5131 119 598.2  37.5150m 148.16
19 108.2  45.0316m 33.771 120 603.1  37.4613m 149.183
20 113.1  44.8162m 34.9789 121 608  37.4205m 150.249
21 118  44.6512m 36.2165 122 612.9  37.3755m 151.299
22 122.9  44.5043m 37.4621 123 617.8  37.3300m 152.347
23 127.8  44.3414m 38.6875 124 622.7  37.2833m 153.386
24 132.7  44.1981m 39.9225 125 627.6  37.2379m 154.427
25 137.6  44.0541m 41.1541 126 632.5  37.1927m 155.468
26 142.5  43.9167m 42.3846 127 637.4  37.1484m 156.512
27 147.4  43.7887m 43.6165 128 642.3  37.1049m 157.549
28 152.3  43.6638m 44.8447 129 647.2  37.0590m 158.581
29 157.2  43.5378m 46.0686 130 652.1  37.0133m 159.609
30 162.1  43.4212m 47.2969 131 657  36.9696m 160.643
31 167  43.3108m 48.5264 132 661.9  36.9255m 161.676
32 171.9  43.1977m 49.7466 133 666.8  36.8808m 162.698
33 176.8  43.0910m 50.97 134 671.7  36.8370m 163.728
34 181.7  42.9876m 52.191 135 676.6  36.7940m 164.755
35 186.6  42.8784m 53.3963 136 681.5  36.7494m 165.775
36 191.5  42.7896m 54.6226 137 686.4  36.7052m 166.796
37 196.4  42.6862m 55.8434 138 691.3  36.6650m 167.832
38 201.3  42.5810m 57.0381 139 696.2  36.6238m 168.853
39 206.2  42.4948m 58.2584 140 701.1  36.5785m 169.862
40 211.1  42.4139m 59.4865 141 706  36.5350m 170.876
41 216  42.3071m 60.6658 142 710.9  36.4951m 171.901
42 220.9  42.2219m 61.8753 143 715.8  36.4506m 172.908
43 225.8  42.1326m 63.0724 144 720.7  36.4078m 173.913
44 230.7  42.0486m 64.2738 145 725.6  36.3646m 174.923
45 235.6  41.9612m 65.4653 146 730.5  36.3229m 175.933
46 240.5  41.8765m 66.6581 147 735.4  36.2811m 176.944
47 245.4  41.7944m 67.8502 148 740.3  36.2399m 177.948
48 250.3  41.7131m 69.0394 149 745.2  36.1970m 178.947
49 255.2  41.6330m 70.2261 150 750.1  36.1564m 179.953
50 260.1  41.5533m 71.4111 151 755  36.1143m 180.95
51 265  41.4750m 72.5931 152 759.9  36.0715m 181.942
52 269.9  41.3976m 73.7697 153 764.8  36.0316m 182.949
53 274.8  41.3256m 74.9546 154 769.7  35.9910m 183.943
54 279.7  41.2485m 76.1277 155 774.6  35.9499m 184.939
55 284.6  41.1736m 77.2989 156 779.5  35.9094m 185.931
56 289.5  41.1038m 78.4801 157 784.4  35.8665m 186.913
57 294.4  41.0247m 79.6336 158 789.3  35.8285m 187.916
58 299.3  40.9593m 80.8153 159 794.2  35.7885m 188.91
59 304.2  40.8840m 81.9685 160 799.1  35.7434m 189.87
60 309.1  40.8089m 83.123 161 804  35.7062m 190.873
61 314  40.7415m 84.2876 162 808.9  35.6686m 191.865
62 318.9  40.6758m 85.4466 163 813.8  35.6247m 192.831
63 323.8  40.6020m 86.5938 164 818.7  35.5857m 193.818
64 328.7  40.5395m 87.755 165 823.6  35.5461m 194.8
65 333.6  40.4746m 88.9104 166 828.5  35.5057m 195.774
66 338.5  40.4072m 90.0555 167 833.4  35.4680m 196.76
67 343.4  40.3402m 91.2005 168 838.3  35.4267m 197.727
68 348.3  40.2760m 92.3446 169 843.2  35.3854m 198.688
69 353.2  40.2109m 93.4853 170 848.1  35.3464m 199.66
70 358.1  40.1460m 94.6238 171 853  35.3071m 200.634
71 363  40.0822m 95.7597 172 857.9  35.2670m 201.595
72 367.9  40.0203m 96.897 173 862.8  35.2280m 202.566
73 372.8  39.9581m 98.0305 174 867.7  35.1886m 203.527
74 377.7  39.8940m 99.1566 175 872.6  35.1493m 204.49
75 382.6  39.8359m 100.294 176 877.5  35.1102m 205.451
76 387.5  39.7735m 101.418 177 882.4  35.0715m 206.412
77 392.4  39.7134m 102.546 178 887.3  35.0343m 207.383
78 397.3  39.6604m 103.685 179 892.2  34.9941m 208.33
79 402.2  39.6000m 104.805 180 897.1  34.9550m 209.282
80 407.1  39.5366m 105.91 181 902  34.9150m 210.232
81 412  39.4698m 107.006 182 906.9  34.8792m 211.199
82 416.9  39.4181m 108.139 183 911.8  34.8381m 212.133
83 421.8  39.3616m 109.254 184 916.7  34.8014m 213.092
84 426.7  39.3038m 110.365 185 921.6  34.7642m 214.045
85 431.6  39.2480m 111.478 186 926.5  34.7261m 214.994
86 436.5  39.1927m 112.59 187 931.4  34.6878m 215.939
87 441.4  39.1369m 113.696 188 936.3  34.6529m 216.9
88 446.3  39.0810m 114.798 189 941.2  34.6126m 217.827
89 451.2  39.0257m 115.901 190 946.1  34.5743m 218.764
90 456.1  38.9717m 117.004 191 951  34.5384m 219.715
91 461  38.9171m 118.102 192 955.9  34.4977m 220.637
92 465.9  38.8656m 119.207 193 960.8  34.4617m 221.58
93 470.8  38.8094m 120.295 194 965.7  34.4235m 222.514
94 475.7  38.7558m 121.387 195 970.6  34.3860m 223.447
95 480.6  38.7035m 122.481 196 975.5  34.3485m 224.376
96 485.5  38.6509m 123.572 197 980.4  34.3096m 225.296
97 490.4  38.5987m 124.661 198 985.3  34.2730m 226.232
98 495.3  38.5465m 125.748 199 990.2  34.2361m 227.155
99 500.2  38.4962m 126.838 200 995.1  34.1992m 228.089
100 505.1  38.4429m 127.912 201  1.00000k  34.1616m 228.999
101 510  38.3931m 128.998 　 　 　 　
Table 6 Detailed frequency data of inductance Ls and reactance Z
 
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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