DXHC25-100 AC Unidirectional Helmholtz Coil: Quality Inspection Report

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DXHC25-100 AC Unidirectional Helmholtz Coil 1 DXHC25-100 AC Unidirectional Helmholtz Coil 2 DXHC25-100 AC Unidirectional Helmholtz Coil 3 DXHC25-100 AC Unidirectional Helmholtz Coil 4

 

Overall Dimensions: 580mm x 360mm x 605mm
Coil spacing: 195mm
Inside diameter of coil: 80mm
Outside diameter of coil: 120mm
Weight: 54.5kg

 

 

 

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:
1D AC Helmholtz coil 		 Product model: DXHC25-100
Test time: 20250728-209
    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
26.0℃ 26.0℃ - 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 10 3.19 30.4
2 20 7.82 60.8
3 30 11.72 91.3
4 33.2 13.02 101.07
5 35 13.65 106.49
6 35（10Hz） 33 100.8
7 27.1(50Hz) 15 80
8 30(50Hz) 16.7 89
9 2(1000Hz) 23 3.7
10 2.2(1000Hz) 25.5 4.1
Table 2 Magnetic field strength data
 
Magnetic field uniformity
No. Measurement area Current Central(Gs)
magnetic field		 Maximum(Gs) 
magnetic field		 Minimum(Gs) 
magnetic field		 Uniformity
1 SΦ40mm 35A 107.09 107.09 107.01 0.074%
Coordinates Magnetic Field Strength (Gs)
(0,0,0) 107.09
(20,0,0) 107.05
(-20,0,0) 107.08
(0,20,0) 107.04
(0,-20,0) 107.09
(0,0,20) 107.01
(0,0,-20) 107.04
　
Magnetic field uniformity
No. Measurement area Current Central(Gs)
magnetic field		 Maximum(Gs) 
magnetic field		 Minimum(Gs) 
magnetic field		 Uniformity
2 SΦ125mm 35A 107.14 107.14 106.66 0.40%
Coordinates Magnetic Field Strength (Gs)
(0,0,0) 107.14
(55,0,0) 106.88
(-55,0,0) 106.99
(0,55,0) 106.66
(0,-55,0) 106.79
(0,0,55) 106.85
(0,0,-55) 106.83
　　　　　　　　
Magnetic field uniformity
No. Measurement area Current Central(Gs)
magnetic field		 Maximum(Gs) 
magnetic field		 Minimum(Gs) 
magnetic field		 Uniformity
3 SΦ160mm 35A 107.09 107.09 105.99 1.02%
Coordinates Magnetic Field Strength (Gs)
(0,0,0) 107.09
(80,0,0) 106.45
(-80,0,0) 106.51
(0,80,0) 105.99
(0,-80,0) 106.2
(0,0,80) 106.51
(0,0,-80) 106.47
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℃
26.0℃ 26.0℃ 0.360Ω 0.350Ω 0.455Ω
Table 4 Resistance R data
　
Inductance Ls, reactance Z measurement (test level 5V)
Ls MIN[H] FREQ[Hz] Ls MAX[H] FREQ[Hz]
 13.7570m  1.00000k  14.2602m 20
Z  MIN[Ω] FREQ[Hz] Z  MAX[Ω] FREQ[Hz]
1.83191 20 86.4727  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  14.2602m 1.83191 102 514.9  13.9281m 45.0813
2 24.9  14.2304m 2.25931 103 519.8  13.9257m 45.5026
3 29.8  14.2562m 2.69739 104 524.7  13.9235m 45.9241
4 34.7  14.2467m 3.13096 105 529.6  13.9212m 46.3453
5 39.6  14.2344m 3.56393 106 534.5  13.9189m 46.7664
6 44.5  14.2307m 3.99902 107 539.4  13.9166m 47.1873
7 49.4  14.2044m 4.42748 108 544.3  13.9145m 47.6086
8 54.3  14.2166m 4.86778 109 549.2  13.9122m 48.0294
9 59.2  14.2154m 5.30393 110 554.1  13.9101m 48.4504
10 64.1  14.2035m 5.73592 111 559  13.9078m 48.871
11 69  14.1975m 6.16996 112 563.9  13.9056m 49.2915
12 73.9  14.1890m 6.60261 113 568.8  13.9034m 49.7121
13 78.8  14.1770m 7.03299 114 573.7  13.9013m 50.1325
14 83.7  14.1657m 7.46312 115 578.6  13.8992m 50.5531
15 88.6  14.1609m 7.8963 116 583.5  13.8971m 50.9733
16 93.5  14.1618m 8.33244 117 588.4  13.8950m 51.3938
17 98.4  14.1632m 8.76888 118 593.3  13.8929m 51.8139
18 103.3  14.1585m 9.20163 119 598.2  13.8908m 52.2338
19 108.2  14.1543m 9.63454 120 603.1  13.8887m 52.6538
20 113.1  14.1493m 10.0667 121 608  13.8866m 53.0735
21 118  14.1449m 10.4989 122 612.9  13.8845m 53.4932
22 122.9  14.1397m 10.9303 123 617.8  13.8826m 53.9133
23 127.8  14.1353m 11.3619 124 622.7  13.8804m 54.3322
24 132.7  14.1312m 11.7936 125 627.6  13.8782m 54.7511
25 137.6  14.1273m 12.2253 126 632.5  13.8762m 55.1707
26 142.5  14.1240m 12.6572 127 637.4  13.8742m 55.5902
27 147.4  14.1206m 13.0889 128 642.3  13.8722m 56.0093
28 152.3  14.1211m 13.5241 129 647.2  13.8701m 56.4279
29 157.2  14.1181m 13.9559 130 652.1  13.8681m 56.8468
30 162.1  14.1151m 14.3874 131 657  13.8662m 57.2664
31 167  14.1118m 14.8185 132 661.9  13.8642m 57.6851
32 171.9  14.1084m 15.2493 133 666.8  13.8623m 58.1039
33 176.8  14.1051m 15.68 134 671.7  13.8603m 58.5225
34 181.7  14.1020m 16.1107 135 676.6  13.8584m 58.9413
35 186.6  14.0985m 16.541 136 681.5  13.8565m 59.3599
36 191.5  14.0956m 16.9716 137 686.4  13.8546m 59.7788
37 196.4  14.0926m 17.4019 138 691.3  13.8527m 60.197
38 201.3  14.0898m 17.8323 139 696.2  13.8508m 60.6156
39 206.2  14.0867m 18.2621 140 701.1  13.8490m 61.0339
40 211.1  14.0841m 18.6925 141 706  13.8471m 61.4523
41 216  14.0813m 19.1224 142 710.9  13.8452m 61.8703
42 220.9  14.0785m 19.5521 143 715.8  13.8435m 62.2889
43 225.8  14.0760m 19.982 144 720.7  13.8416m 62.7068
44 230.7  14.0733m 20.4116 145 725.6  13.8398m 63.1248
45 235.6  14.0708m 20.8413 146 730.5  13.8380m 63.543
46 240.5  14.0677m 21.2699 147 735.4  13.8363m 63.9612
47 245.4  14.0654m 21.6995 148 740.3  13.8345m 64.3789
48 250.3  14.0630m 22.1288 149 745.2  13.8328m 64.7968
49 255.2  14.0604m 22.5578 150 750.1  13.8309m 65.2141
50 260.1  14.0581m 22.9869 151 755  13.8293m 65.6322
51 265  14.0553m 23.4154 152 759.9  13.8275m 66.0499
52 269.9  14.0528m 23.8439 153 764.8  13.8258m 66.4674
53 274.8  14.0500m 24.2718 154 769.7  13.8242m 66.8854
54 279.7  14.0474m 24.7 155 774.6  13.8225m 67.3029
55 284.6  14.0448m 25.128 156 779.5  13.8208m 67.7205
56 289.5  14.0421m 25.5556 157 784.4  13.8191m 68.1376
57 294.4  14.0394m 25.983 158 789.3  13.8175m 68.5554
58 299.3  14.0368m 26.4105 159 794.2  13.8158m 68.9726
59 304.2  14.0335m 26.8365 160 799.1  13.8142m 69.39
60 309.1  14.0309m 27.2636 161 804  13.8126m 69.8071
61 314  14.0283m 27.6906 162 808.9  13.8110m 70.2244
62 318.9  14.0257m 28.1174 163 813.8  13.8094m 70.6417
63 323.8  14.0231m 28.5442 164 818.7  13.8078m 71.0588
64 328.7  14.0205m 28.9707 165 823.6  13.8063m 71.476
65 333.6  14.0179m 29.3971 166 828.5  13.8047m 71.893
66 338.5  14.0155m 29.8238 167 833.4  13.8032m 72.3103
67 343.4  14.0128m 30.2495 168 838.3  13.8015m 72.7265
68 348.3  14.0103m 30.6756 169 843.2  13.8001m 73.1443
69 353.2  14.0077m 31.1014 170 848.1  13.7986m 73.5611
70 358.1  14.0065m 31.5302 171 853  13.7971m 73.9781
71 363  14.0041m 31.956 172 857.9  13.7956m 74.3949
72 367.9  14.0015m 32.3813 173 862.8  13.7939m 74.8107
73 372.8  13.9990m 32.8067 174 867.7  13.7926m 75.2284
74 377.7  13.9965m 33.232 175 872.6  13.7912m 75.6452
75 382.6  13.9939m 33.6568 176 877.5  13.7897m 76.0618
76 387.5  13.9914m 34.0818 177 882.4  13.7883m 76.4785
77 392.4  13.9890m 34.5068 178 887.3  13.7868m 76.8952
78 397.3  13.9865m 34.9314 179 892.2  13.7854m 77.3119
79 402.2  13.9839m 35.3556 180 897.1  13.7840m 77.7285
80 407.1  13.9813m 35.7796 181 902  13.7826m 78.145
81 412  13.9788m 36.2037 182 906.9  13.7813m 78.5618
82 416.9  13.9762m 36.6276 183 911.8  13.7799m 78.9784
83 421.8  13.9738m 37.0517 184 916.7  13.7786m 79.395
84 426.7  13.9713m 37.4754 185 921.6  13.7772m 79.8112
85 431.6  13.9688m 37.899 186 926.5  13.7758m 80.2276
86 436.5  13.9664m 38.3227 187 931.4  13.7745m 80.6445
87 441.4  13.9639m 38.7457 188 936.3  13.7731m 81.0604
88 446.3  13.9615m 39.1692 189 941.2  13.7719m 81.4773
89 451.2  13.9591m 39.5924 190 946.1  13.7706m 81.8933
90 456.1  13.9566m 40.0151 191 951  13.7692m 82.3094
91 461  13.9540m 40.4376 192 955.9  13.7680m 82.7262
92 465.9  13.9517m 40.8606 193 960.8  13.7670m 83.1442
93 470.8  13.9493m 41.283 194 965.7  13.7657m 83.56
94 475.7  13.9468m 41.7053 195 970.6  13.7645m 83.9769
95 480.6  13.9445m 42.1279 196 975.5  13.7632m 84.3928
96 485.5  13.9420m 42.5499 197 980.4  13.7620m 84.8092
97 490.4  13.9398m 42.9724 198 985.3  13.7607m 85.2251
98 495.3  13.9373m 43.3941 199 990.2  13.7595m 85.6414
99 500.2  13.9350m 43.8161 200 995.1  13.7583m 86.0574
100 505.1  13.9327m 44.2379 201  1.00000k  13.7570m 86.4727
101 510  13.9304m 44.6596 　 　 　 　
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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