DXSDF45-35 Single-axis Square Helmholtz Coil: Quality Inspection Report

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DXSDF45-35 Single-axis Square Helmholtz Coil P1

 

DXSDF45-35 Single-axis Square Helmholtz Coil P2

 

DXSDF45-35 Single-axis Square Helmholtz Coil P3

 

DXSDF45-35 Single-axis Square Helmholtz Coil P4

 

Waveform of DXSDF45-35 Single-axis Square Helmholtz Coil

 

 

 

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:
Single-axis square Helmholtz coil		 Product model: DXSDF45-35
Test time: 20260904-368
    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-330F Fluxgate magnetometer
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）
Central magnetic field 5 - 10.597
10 - 20.985
15 - 31.678
20 - 42.397
25 - 53.111
Central magnetic field at 50 cm from the coil 5 - 3.795
10 - 7.275
15 - 11.035
20 - 14.803
25 - 18.556
Central magnetic field at 100 cm from the coil 5 - 0.969
10 - 1.938
15 - 2.906
20 - 3.878
25 - 4.846
Central magnetic field at 150 cm from the coil 5 - 0.358
10 - 0.690
15 - 1.025
20 - 1.376
25 - 1.716
Central magnetic field at 200 cm from the coil 5 - 0.151
10 - 0.333
15 - 0.458
20 - 0.616
25 - 0.770
17 - 0.510
17Ap(1Hz) 26.7Vp 0.500
Table 2 Magnetic field strength 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℃ 1.330Ω 1.300Ω 1.689Ω
Table 3 Resistance R data
　
Inductance Ls, reactance Z measurement (test level 5V)
Ls MIN[H] FREQ[Hz] Ls MAX[H] FREQ[Hz]
 61.7122m  1.00000k  62.6365m 20
Z  MIN[Ω] FREQ[Hz] Z  MAX[Ω] FREQ[Hz]
7.98579 20 387.855  1.00000k
Table 4 inductance Ls and reactance Z data

 

Inductance Ls, reactance Z-scan measurement
POINTS FREQ[Hz] Ls Z  POINTS FREQ[Hz] Ls Z 
1 20  62.6365m 7.98579 102 514.9  61.9866m 200.579
2 24.9  62.5945m 9.88668 103 519.8  61.9843m 202.48
3 29.8  62.5378m 11.789 104 524.7  61.9802m 204.375
4 34.7  62.5286m 13.7032 105 529.6  61.9776m 206.275
5 39.6  62.4433m 15.5996 106 534.5  61.9741m 208.172
6 44.5  62.4954m 17.5301 107 539.4  61.9715m 210.072
7 49.4  62.4969m 19.449 108 544.3  61.9670m 211.965
8 54.3  62.4597m 21.3573 109 549.2  61.9635m 213.861
9 59.2  62.4690m 23.282 110 554.1  61.9608m 215.76
10 64.1  62.4267m 25.1845 111 559  61.9561m 217.651
11 69  62.4197m 27.1011 112 563.9  61.9543m 219.553
12 73.9  62.4005m 29.0119 113 568.8  61.9515m 221.451
13 78.8  62.4057m 30.9341 114 573.7  61.9482m 223.347
14 83.7  62.3967m 32.8494 115 578.6  61.9453m 225.244
15 88.6  62.3829m 34.7615 116 583.5  61.9428m 227.142
16 93.5  62.3720m 36.6746 117 588.4  61.9396m 229.038
17 98.4  62.3684m 38.5917 118 593.3  61.9370m 230.936
18 103.3  62.3492m 40.4985 119 598.2  61.9338m 232.831
19 108.2  62.3475m 42.4161 120 603.1  61.9309m 234.727
20 113.1  62.3344m 44.3258 121 608  61.9277m 236.623
21 118  62.3240m 46.2365 122 612.9  61.9249m 238.519
22 122.9  62.3166m 48.149 123 617.8  61.9227m 240.417
23 127.8  62.3116m 50.063 124 622.7  61.9196m 242.312
24 132.7  62.3019m 51.9729 125 627.6  61.9168m 244.208
25 137.6  62.2936m 53.8834 126 632.5  61.9145m 246.106
26 142.5  62.2924m 55.8001 127 637.4  61.9118m 248.002
27 147.4  62.2661m 57.6929 128 642.3  61.9084m 249.895
28 152.3  62.2922m 59.6352 129 647.2  61.9071m 251.796
29 157.2  62.2667m 61.5275 130 652.1  61.9040m 253.69
30 162.1  62.2586m 63.4358 131 657  61.9011m 255.584
31 167  62.2502m 65.3438 132 661.9  61.8961m 257.47
32 171.9  62.2494m 67.2591 133 666.8  61.8953m 259.373
33 176.8  62.2435m 69.169 134 671.7  61.8923m 261.266
34 181.7  62.2376m 71.0784 135 676.6  61.8893m 263.16
35 186.6  62.2332m 72.9893 136 681.5  61.8870m 265.056
36 191.5  62.2251m 74.8955 137 686.4  61.8841m 266.949
37 196.4  62.2236m 76.8093 138 691.3  61.8818m 268.845
38 201.3  62.2156m 78.7148 139 696.2  61.8792m 270.74
39 206.2  62.2077m 80.6199 140 701.1  61.8762m 272.632
40 211.1  62.2022m 82.5279 141 706  61.8739m 274.528
41 216  62.1992m 84.4388 142 710.9  61.8706m 276.419
42 220.9  62.1946m 86.3475 143 715.8  61.8690m 278.317
43 225.8  62.1889m 88.2543 144 720.7  61.8667m 280.212
44 230.7  62.1838m 90.1616 145 725.6  61.8628m 282.1
45 235.6  62.1780m 92.0676 146 730.5  61.8598m 283.991
46 240.5  62.1764m 93.9795 147 735.4  61.8583m 285.89
47 245.4  62.1688m 95.882 148 740.3  61.8551m 287.78
48 250.3  62.1685m 97.7955 149 745.2  61.8519m 289.669
49 255.2  62.1618m 99.6991 150 750.1  61.8506m 291.568
50 260.1  62.1558m 101.603 151 755  61.8467m 293.455
51 265  62.1545m 103.515 152 759.9  61.8450m 295.351
52 269.9  62.1470m 105.416 153 764.8  61.8397m 297.231
53 274.8  62.1427m 107.322 154 769.7  61.8391m 299.132
54 279.7  62.1414m 109.233 155 774.6  61.8364m 301.024
55 284.6  62.1382m 111.14 156 779.5  61.8338m 302.915
56 289.5  62.1337m 113.046 157 784.4  61.8311m 304.807
57 294.4  62.1303m 114.952 158 789.3  61.8276m 306.694
58 299.3  62.1278m 116.861 159 794.2  61.8253m 308.586
59 304.2  62.1226m 118.764 160 799.1  61.8229m 310.479
60 309.1  62.1192m 120.67 161 804  61.8205m 312.371
61 314  62.1157m 122.576 162 808.9  61.8143m 314.243
62 318.9  62.1121m 124.481 163 813.8  61.8120m 316.135
63 323.8  62.1089m 126.387 164 818.7  61.8093m 318.026
64 328.7  62.1057m 128.293 165 823.6  61.8057m 319.91
65 333.6  62.1009m 130.195 166 828.5  61.8037m 321.804
66 338.5  62.0990m 132.103 167 833.4  61.8010m 323.693
67 343.4  62.0950m 134.006 168 838.3  61.7994m 325.588
68 348.3  62.0908m 135.909 169 843.2  61.7955m 327.471
69 353.2  62.0886m 137.816 170 848.1  61.7915m 329.353
70 358.1  62.0841m 139.718 171 853  61.7902m 331.249
71 363  62.0810m 141.622 172 857.9  61.7875m 333.137
72 367.9  62.0785m 143.528 173 862.8  61.7844m 335.023
73 372.8  62.0748m 145.431 174 867.7  61.7827m 336.917
74 377.7  62.0710m 147.334 175 872.6  61.7794m 338.802
75 382.6  62.0677m 149.237 176 877.5  61.7775m 340.694
76 387.5  62.0653m 151.142 177 882.4  61.7747m 342.582
77 392.4  62.0616m 153.044 178 887.3  61.7718m 344.468
78 397.3  62.0580m 154.946 179 892.2  61.7687m 346.354
79 402.2  62.0554m 156.851 180 897.1  61.7661m 348.241
80 407.1  62.0523m 158.753 181 902  61.7641m 350.132
81 412  62.0502m 160.659 182 906.9  61.7612m 352.018
82 416.9  62.0458m 162.558 183 911.8  61.7585m 353.905
83 421.8  62.0440m 164.464 184 916.7  61.7566m 355.796
84 426.7  62.0401m 166.364 185 921.6  61.7535m 357.681
85 431.6  62.0374m 168.267 186 926.5  61.7509m 359.568
86 436.5  62.0375m 170.178 187 931.4  61.7484m 361.455
87 441.4  62.0259m 172.056 188 936.3  61.7461m 363.343
88 446.3  62.0300m 173.977 189 941.2  61.7431m 365.228
89 451.2  62.0241m 175.87 190 946.1  61.7411m 367.117
90 456.1  62.0220m 177.774 191 951  61.7389m 369.006
91 461  62.0165m 179.668 192 955.9  61.7357m 370.888
92 465.9  62.0179m 181.582 193 960.8  61.7324m 372.77
93 470.8  62.0157m 183.485 194 965.7  61.7302m 374.658
94 475.7  62.0110m 185.381 195 970.6  61.7274m 376.543
95 480.6  62.0083m 187.282 196 975.5  61.7250m 378.429
96 485.5  62.0032m 189.176 197 980.4  61.7226m 380.316
97 490.4  62.0019m 191.082 198 985.3  61.7200m 382.201
98 495.3  61.9992m 192.983 199 990.2  61.7173m 384.085
99 500.2  61.9963m 194.883 200 995.1  61.7147m 385.97
100 505.1  61.9929m 196.781 201  1.00000k  61.7122m 387.855
101 510  61.9906m 198.683 　 　 　 　
Table 5 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(DC 17A)
Operating current [A] Operating time [min] Product temperature [℃] Product voltage [V]
17 0 30 23.28
5 36.5 23.84
10 43.2 24.33
15 49.5 24.78
20 54.9 25.15
25 59.8 25.54
30 64.8 25.92
35 69.1 26.25
40 73.6 26.58
Temperature Rise Test(AC 17A)
17Ap(1Hz) 0 26.1
5 29.2
10 32.2
15 34.8
20 37.2
25 39.4
30 41.3
35 43.2
40 44.9
45 46.4
50 47.9
55 49.2
60 50.6
65 51.8
70 53
Note Continuous operation time at 17 A DC exceeds 40 min; continuous operation time at 1 Hz AC exceeds 70 min.
Table 6: Data on the relationship between temperature, operating time, and current.

 

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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