Quality Inspection Report: Custom DXHC Helmholtz Coil

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Custom DXHC Helmholtz Coil Custom DXHC Helmholtz Coil Custom DXHC Helmholtz Coil

 

Overall Dimensions: 137mm x 130mm x 15mm
Coil spacing
Inside diameter of coil: 110mm
Outside diameter of coil: 130mm
Weight: 0.09kg

 

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:
Helmholtz coil		 Product model: DXHC
Test time: Sep. 25, 2024
    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 Voltage (V) Magnetic field
strength（Gs）
DXHC-1 10 - 6.222
DXHC-2 10 - 6.253
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℃
DXHC-1 20.0℃ 0.033Ω 0.033Ω 0.043Ω
DXHC-2 20.0℃ 0.032Ω 0.032Ω 0.042Ω
Table 3 Resistance R data
　
Inductance Ls, reactance Z measurement (test level 5V)
Ls MIN[H] FREQ[Hz] Ls MAX[H] FREQ[Hz]
 8.54089u 887.3  9.27265u 20
Z  MIN[Ω] FREQ[Hz] Z  MAX[Ω] FREQ[Hz]
0.03367 20 0.06338  1.00000k
Table 4 DXHC-1 inductance Ls and reactance Z data
　
Inductance Ls, reactance Z-scan measurement
POINTS FREQ[Hz] Ls Z  POINTS FREQ[Hz] Ls Z 
1 20  9.27265u 0.03367 102 514.9  8.54481u 0.04355
2 24.9  9.08513u 0.03368 103 519.8  8.54664u 0.04372
3 29.8  8.88310u 0.0337 104 524.7  8.54590u 0.04388
4 34.7  8.66359u 0.03371 105 529.6  8.54674u 0.04406
5 39.6  8.72906u 0.03373 106 534.5  8.55118u 0.04424
6 44.5  8.65049u 0.03375 107 539.4  8.54687u 0.04441
7 49.4  8.62255u 0.03374 108 544.3  8.55273u 0.0446
8 54.3  8.62994u 0.03378 109 549.2  8.55020u 0.04476
9 59.2  8.66613u 0.03381 110 554.1  8.55451u 0.04494
10 64.1  8.61334u 0.03383 111 559  8.55355u 0.04512
11 69  8.59357u 0.03387 112 563.9  8.54963u 0.04528
12 73.9  8.55417u 0.03388 113 568.8  8.55104u 0.04546
13 78.8  8.60744u 0.03393 114 573.7  8.55241u 0.04564
14 83.7  8.58701u 0.03395 115 578.6  8.55183u 0.04582
15 88.6  8.59003u 0.03398 116 583.5  8.55314u 0.046
16 93.5  8.56675u 0.03402 117 588.4  8.55024u 0.04617
17 98.4  8.58867u 0.03409 118 593.3  8.55343u 0.04635
18 103.3  8.57103u 0.03411 119 598.2  8.55137u 0.04653
19 108.2  8.58153u 0.03416 120 603.1  8.54982u 0.04671
20 113.1  8.59300u 0.03421 121 608  8.55152u 0.04691
21 118  8.57591u 0.03427 122 612.9  8.55436u 0.04709
22 122.9  8.57197u 0.03429 123 617.8  8.55240u 0.04727
23 127.8  8.55079u 0.03434 124 622.7  8.55057u 0.04745
24 132.7  8.56072u 0.0344 125 627.6  8.55036u 0.04764
25 137.6  8.55432u 0.03444 126 632.5  8.54978u 0.04783
26 142.5  8.56638u 0.03451 127 637.4  8.55099u 0.04802
27 147.4  8.58275u 0.03455 128 642.3  8.54927u 0.0482
28 152.3  8.54832u 0.03462 129 647.2  8.55129u 0.04839
29 157.2  8.56600u 0.03469 130 652.1  8.55093u 0.04858
30 162.1  8.54682u 0.03473 131 657  8.55157u 0.04878
31 167  8.55384u 0.03482 132 661.9  8.55060u 0.04896
32 171.9  8.56547u 0.03489 133 666.8  8.55075u 0.04916
33 176.8  8.55434u 0.03497 134 671.7  8.54896u 0.04934
34 181.7  8.55644u 0.03503 135 676.6  8.54879u 0.04954
35 186.6  8.57365u 0.03513 136 681.5  8.54776u 0.04972
36 191.5  8.56148u 0.0352 137 686.4  8.54961u 0.04993
37 196.4  8.55813u 0.03527 138 691.3  8.54919u 0.05012
38 201.3  8.56574u 0.03536 139 696.2  8.54807u 0.05031
39 206.2  8.56289u 0.03543 140 701.1  8.54850u 0.05051
40 211.1  8.56129u 0.03551 141 706  8.54842u 0.05069
41 216  8.56634u 0.0356 142 710.9  8.54783u 0.05089
42 220.9  8.57313u 0.0357 143 715.8  8.54788u 0.05109
43 225.8  8.55476u 0.03578 144 720.7  8.54779u 0.05129
44 230.7  8.56482u 0.03587 145 725.6  8.54991u 0.05149
45 235.6  8.56425u 0.03596 146 730.5  8.54915u 0.05169
46 240.5  8.55977u 0.03605 147 735.4  8.55012u 0.0519
47 245.4  8.56024u 0.03615 148 740.3  8.54936u 0.05209
48 250.3  8.55595u 0.03624 149 745.2  8.54908u 0.05229
49 255.2  8.55551u 0.03634 150 750.1  8.54798u 0.05249
50 260.1  8.55420u 0.03643 151 755  8.54998u 0.0527
51 265  8.55228u 0.03654 152 759.9  8.54689u 0.05289
52 269.9  8.55497u 0.03665 153 764.8  8.54875u 0.05309
53 274.8  8.55600u 0.03675 154 769.7  8.55021u 0.0533
54 279.7  8.55546u 0.03685 155 774.6  8.54976u 0.05351
55 284.6  8.55640u 0.03697 156 779.5  8.55039u 0.05371
56 289.5  8.54929u 0.03708 157 784.4  8.54897u 0.05391
57 294.4  8.55346u 0.03719 158 789.3  8.55066u 0.05412
58 299.3  8.55484u 0.03731 159 794.2  8.55037u 0.05433
59 304.2  8.55149u 0.03744 160 799.1  8.54810u 0.05453
60 309.1  8.55055u 0.03755 161 804  8.54761u 0.05473
61 314  8.55379u 0.03767 162 808.9  8.54725u 0.05494
62 318.9  8.55883u 0.03779 163 813.8  8.54738u 0.05515
63 323.8  8.55420u 0.0379 164 818.7  8.54694u 0.05536
64 328.7  8.55730u 0.03803 165 823.6  8.54681u 0.05556
65 333.6  8.55571u 0.03814 166 828.5  8.54540u 0.05576
66 338.5  8.55353u 0.03827 167 833.4  8.54457u 0.05597
67 343.4  8.55635u 0.03839 168 838.3  8.54390u 0.05618
68 348.3  8.55777u 0.03853 169 843.2  8.54354u 0.05638
69 353.2  8.55714u 0.03864 170 848.1  8.54244u 0.05659
70 358.1  8.55256u 0.03876 171 853  8.54408u 0.05681
71 363  8.55419u 0.03891 172 857.9  8.54277u 0.05701
72 367.9  8.55755u 0.03904 173 862.8  8.54128u 0.05723
73 372.8  8.55291u 0.03917 174 867.7  8.54417u 0.05745
74 377.7  8.55606u 0.03931 175 872.6  8.54220u 0.05765
75 382.6  8.55515u 0.03943 176 877.5  8.54210u 0.05787
76 387.5  8.55552u 0.03959 177 882.4  8.54342u 0.05809
77 392.4  8.55434u 0.03972 178 887.3  8.54089u 0.05829
78 397.3  8.55327u 0.03985 179 892.2  8.54267u 0.05851
79 402.2  8.55455u 0.03999 180 897.1  8.54301u 0.05873
80 407.1  8.55563u 0.04014 181 902  8.54419u 0.05895
81 412  8.55734u 0.04029 182 906.9  8.54386u 0.05917
82 416.9  8.55454u 0.04043 183 911.8  8.54393u 0.05938
83 421.8  8.55377u 0.04058 184 916.7  8.54594u 0.05961
84 426.7  8.55532u 0.04073 185 921.6  8.54611u 0.05983
85 431.6  8.55595u 0.04088 186 926.5  8.54554u 0.06004
86 436.5  8.55431u 0.04103 187 931.4  8.54573u 0.06026
87 441.4  8.55448u 0.04118 188 936.3  8.54852u 0.0605
88 446.3  8.55226u 0.04132 189 941.2  8.54650u 0.0607
89 451.2  8.55669u 0.04149 190 946.1  8.54640u 0.06092
90 456.1  8.55297u 0.04164 191 951  8.54709u 0.06115
91 461  8.55302u 0.0418 192 955.9  8.54957u 0.06138
92 465.9  8.55107u 0.04195 193 960.8  8.55116u 0.06161
93 470.8  8.54791u 0.0421 194 965.7  8.55236u 0.06183
94 475.7  8.54745u 0.04226 195 970.6  8.55003u 0.06204
95 480.6  8.55101u 0.04242 196 975.5  8.55263u 0.06228
96 485.5  8.54588u 0.04258 197 980.4  8.55093u 0.06249
97 490.4  8.54423u 0.04273 198 985.3  8.55189u 0.06272
98 495.3  8.54822u 0.0429 199 990.2  8.55090u 0.06293
99 500.2  8.54502u 0.04305 200 995.1  8.55095u 0.06315
100 505.1  8.54256u 0.04321 201  1.00000k  8.55071u 0.06338
101 510  8.54823u 0.04339 　 　 　 　
Table 5 DXHC-1 Detailed frequency data of inductance Ls and reactance Z
Inductance Ls, reactance Z measurement (test level 5V)
Ls MIN[H] FREQ[Hz] Ls MAX[H] FREQ[Hz]
 7.60461u 916.7  9.38735u 20
Z  MIN[Ω] FREQ[Hz] Z  MAX[Ω] FREQ[Hz]
0.03321 20 0.05866  1.00000k
Table 6 DXHC-2 inductance Ls and reactance Z data
　
Inductance Ls, reactance Z-scan measurement
POINTS FREQ[Hz] Ls Z  POINTS FREQ[Hz] Ls Z 
1 20  9.38735u 0.03321 102 514.9  7.65122u 0.04191
2 24.9  8.91282u 0.03326 103 519.8  7.65029u 0.04205
3 29.8  8.79399u 0.03331 104 524.7  7.65096u 0.0422
4 34.7  8.45834u 0.03331 105 529.6  7.64797u 0.04233
5 39.6  8.56590u 0.03336 106 534.5  7.64975u 0.04249
6 44.5  8.43767u 0.03338 107 539.4  7.64656u 0.04262
7 49.4  8.32520u 0.03339 108 544.3  7.64897u 0.04278
8 54.3  8.26690u 0.03344 109 549.2  7.65143u 0.04294
9 59.2  8.27763u 0.03346 110 554.1  7.64765u 0.04307
10 64.1  8.19763u 0.03351 111 559  7.64686u 0.04321
11 69  8.20710u 0.03355 112 563.9  7.64725u 0.04337
12 73.9  8.14267u 0.03359 113 568.8  7.65028u 0.04353
13 78.8  8.13285u 0.03362 114 573.7  7.64890u 0.04367
14 83.7  8.11210u 0.03367 115 578.6  7.64698u 0.04382
15 88.6  8.08503u 0.0337 116 583.5  7.64588u 0.04396
16 93.5  8.04159u 0.03374 117 588.4  7.64424u 0.04411
17 98.4  8.03634u 0.03379 118 593.3  7.64540u 0.04426
18 103.3  8.03220u 0.03385 119 598.2  7.64175u 0.04441
19 108.2  8.01660u 0.03388 120 603.1  7.64036u 0.04455
20 113.1  7.98870u 0.03394 121 608  7.64156u 0.04472
21 118  7.99180u 0.034 122 612.9  7.63842u 0.04487
22 122.9  7.93969u 0.03403 123 617.8  7.63932u 0.04503
23 127.8  7.95420u 0.03408 124 622.7  7.63983u 0.04519
24 132.7  7.93106u 0.03414 125 627.6  7.63629u 0.04533
25 137.6  7.91555u 0.03419 126 632.5  7.63701u 0.04549
26 142.5  7.88559u 0.03423 127 637.4  7.63735u 0.04565
27 147.4  7.89311u 0.0343 128 642.3  7.63503u 0.04581
28 152.3  7.87089u 0.03433 129 647.2  7.63639u 0.04598
29 157.2  7.86172u 0.03441 130 652.1  7.63356u 0.04613
30 162.1  7.86833u 0.03446 131 657  7.63314u 0.04628
31 167  7.84256u 0.03453 132 661.9  7.63316u 0.04645
32 171.9  7.85067u 0.03461 133 666.8  7.63238u 0.04661
33 176.8  7.84126u 0.03468 134 671.7  7.63025u 0.04676
34 181.7  7.83203u 0.03475 135 676.6  7.63033u 0.04693
35 186.6  7.82922u 0.03481 136 681.5  7.62909u 0.04708
36 191.5  7.82057u 0.03488 137 686.4  7.63139u 0.04726
37 196.4  7.81316u 0.03494 138 691.3  7.62791u 0.04741
38 201.3  7.81293u 0.03502 139 696.2  7.62678u 0.04757
39 206.2  7.81505u 0.0351 140 701.1  7.62719u 0.04775
40 211.1  7.79603u 0.03516 141 706  7.62693u 0.04791
41 216  7.79458u 0.03524 142 710.9  7.62587u 0.04807
42 220.9  7.78953u 0.0353 143 715.8  7.62532u 0.04824
43 225.8  7.78737u 0.03538 144 720.7  7.62454u 0.04841
44 230.7  7.78447u 0.03546 145 725.6  7.62475u 0.04857
45 235.6  7.78188u 0.03554 146 730.5  7.62400u 0.04874
46 240.5  7.77565u 0.03563 147 735.4  7.62441u 0.04891
47 245.4  7.76948u 0.03571 148 740.3  7.62373u 0.04908
48 250.3  7.76539u 0.03579 149 745.2  7.62096u 0.04924
49 255.2  7.76576u 0.03588 150 750.1  7.62239u 0.04942
50 260.1  7.75486u 0.03597 151 755  7.62224u 0.04959
51 265  7.75172u 0.03605 152 759.9  7.62147u 0.04976
52 269.9  7.75099u 0.03614 153 764.8  7.62200u 0.04994
53 274.8  7.73870u 0.03622 154 769.7  7.62145u 0.0501
54 279.7  7.73720u 0.03632 155 774.6  7.62354u 0.05028
55 284.6  7.73966u 0.03642 156 779.5  7.61999u 0.05044
56 289.5  7.73710u 0.03651 157 784.4  7.62135u 0.05062
57 294.4  7.73047u 0.0366 158 789.3  7.62003u 0.05079
58 299.3  7.72660u 0.0367 159 794.2  7.61942u 0.05097
59 304.2  7.72035u 0.0368 160 799.1  7.61808u 0.05114
60 309.1  7.72327u 0.0369 161 804  7.61622u 0.05131
61 314  7.72138u 0.037 162 808.9  7.61372u 0.05147
62 318.9  7.71721u 0.0371 163 813.8  7.61489u 0.05166
63 323.8  7.71267u 0.0372 164 818.7  7.61380u 0.05183
64 328.7  7.71425u 0.03731 165 823.6  7.61268u 0.05201
65 333.6  7.70837u 0.0374 166 828.5  7.61153u 0.05218
66 338.5  7.70358u 0.03751 167 833.4  7.61122u 0.05236
67 343.4  7.70703u 0.03762 168 838.3  7.61149u 0.05254
68 348.3  7.70494u 0.03772 169 843.2  7.61000u 0.05272
69 353.2  7.70157u 0.03783 170 848.1  7.60755u 0.05288
70 358.1  7.70235u 0.03794 171 853  7.61163u 0.05309
71 363  7.69433u 0.03804 172 857.9  7.60874u 0.05325
72 367.9  7.69755u 0.03815 173 862.8  7.60718u 0.05343
73 372.8  7.69643u 0.03826 174 867.7  7.60709u 0.05361
74 377.7  7.69308u 0.03837 175 872.6  7.60623u 0.05378
75 382.6  7.69221u 0.03849 176 877.5  7.60859u 0.05398
76 387.5  7.69075u 0.0386 177 882.4  7.60696u 0.05416
77 392.4  7.68569u 0.03871 178 887.3  7.60595u 0.05434
78 397.3  7.68573u 0.03883 179 892.2  7.60739u 0.05453
79 402.2  7.68701u 0.03895 180 897.1  7.60527u 0.0547
80 407.1  7.68554u 0.03907 181 902  7.60648u 0.0549
81 412  7.68129u 0.03918 182 906.9  7.60594u 0.05507
82 416.9  7.67980u 0.0393 183 911.8  7.60631u 0.05526
83 421.8  7.68057u 0.03944 184 916.7  7.60461u 0.05544
84 426.7  7.67685u 0.03955 185 921.6  7.60534u 0.05563
85 431.6  7.67696u 0.03967 186 926.5  7.60581u 0.05582
86 436.5  7.67766u 0.03981 187 931.4  7.60669u 0.05601
87 441.4  7.67819u 0.03993 188 936.3  7.60886u 0.05621
88 446.3  7.67527u 0.04006 189 941.2  7.60542u 0.05638
89 451.2  7.66949u 0.04018 190 946.1  7.60696u 0.05658
90 456.1  7.66733u 0.04031 191 951  7.60797u 0.05677
91 461  7.66762u 0.04044 192 955.9  7.60616u 0.05695
92 465.9  7.66476u 0.04057 193 960.8  7.60973u 0.05716
93 470.8  7.66103u 0.0407 194 965.7  7.60828u 0.05734
94 475.7  7.66215u 0.04083 195 970.6  7.60661u 0.05752
95 480.6  7.66097u 0.04097 196 975.5  7.60861u 0.05772
96 485.5  7.65931u 0.0411 197 980.4  7.60800u 0.05791
97 490.4  7.65742u 0.04123 198 985.3  7.60827u 0.0581
98 495.3  7.65512u 0.04137 199 990.2  7.60760u 0.05829
99 500.2  7.65266u 0.0415 200 995.1  7.60672u 0.05847
100 505.1  7.65312u 0.04164 201  1.00000k  7.60572u 0.05866
101 510  7.65119u 0.04177 　 　 　 　
Table 7 DXHC-2 Detailed frequency data of inductance Ls and reactance Z

 

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