Quality Inspection Report: DXHC-SC-309 Saddle-shaped Helmholtz Coil

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DXHC-SC-309 Saddle-shaped Helmholtz Coil Saddle Helmholtz Coil close-up of Saddle-shaped Helmholtz Coil

 

Overall Dimensions: 345mm(L) x 345mm(W) x 520mm(H)
Coil spacing
Inside diameter of coil: 310mm
outside diameter of coil: 345mm
Weight: 16.56kg

 

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:
Saddle coil		 Product model: DXHC-SC-309
Test time: Aug. 12, 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
25.0℃ 25.0℃ 3M 0~30000nT
Table 1 Measurement environment data
　
Magnetic field parameter test
    1. Using the device
DX-F2031 power supply
DX-180 Gauss Meter
    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
Axis Display current (A) Display voltage Voltage (V) Magnetic field
strength（Gs）
X 1 - 1.27
Y 1 - 1.28
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
Axis Product temperature Measuring resistance ResistanceR@20℃ ResistanceR@85℃
X 25.0℃ 2.480Ω 2.424Ω 3.149Ω
Y 25.0℃ 2.490Ω 2.434Ω 3.162Ω
Table 3 Resistance R data
　
X-axis Inductance Ls, reactance Z measurement (test level 5V)
Ls MIN[H] FREQ[Hz] Ls MAX[H] FREQ[Hz]
 2.08815m  1.00000k  2.17763m 20
Z  MIN[Ω] FREQ[Hz] Z  MAX[Ω] FREQ[Hz]
2.69256 20 13.4067  1.00000k
Table 4 X-axis inductance Ls and reactance Z data
　
X-axis Inductance Ls, reactance Z-scan measurement
POINTS FREQ[Hz] Ls Z  POINTS FREQ[Hz] Ls Z 
1 20  2.17763m 2.69256 102 514.9  2.09349m 7.30494
2 24.9  2.17051m 2.69995 103 519.8  2.09343m 7.36461
3 29.8  2.16577m 2.70975 104 524.7  2.09334m 7.42427
4 34.7  2.16089m 2.72134 105 529.6  2.09327m 7.48407
5 39.6  2.15603m 2.73418 106 534.5  2.09319m 7.54392
6 44.5  2.15324m 2.7483 107 539.4  2.09312m 7.60383
7 49.4  2.14980m 2.76401 108 544.3  2.09312m 7.66353
8 54.3  2.14838m 2.78198 109 549.2  2.09304m 7.72355
9 59.2  2.14793m 2.8015 110 554.1  2.09293m 7.78354
10 64.1  2.14456m 2.82131 111 559  2.09283m 7.84367
11 69  2.14199m 2.84303 112 563.9  2.09275m 7.90386
12 73.9  2.13907m 2.86571 113 568.8  2.09267m 7.96411
13 78.8  2.13665m 2.89008 114 573.7  2.09258m 8.02439
14 83.7  2.13420m 2.91523 115 578.6  2.09250m 8.08476
15 88.6  2.13147m 2.94136 116 583.5  2.09242m 8.1452
16 93.5  2.13029m 2.96903 117 588.4  2.09233m 8.20563
17 98.4  2.13057m 2.998 118 593.3  2.09224m 8.26613
18 103.3  2.12893m 3.02772 119 598.2  2.09216m 8.32672
19 108.2  2.12736m 3.05868 120 603.1  2.09208m 8.38735
20 113.1  2.12596m 3.09069 121 608  2.09200m 8.44806
21 118  2.12463m 3.12368 122 612.9  2.09189m 8.50868
22 122.9  2.12330m 3.15721 123 617.8  2.09182m 8.56952
23 127.8  2.12216m 3.19171 124 622.7  2.09174m 8.63037
24 132.7  2.12086m 3.22704 125 627.6  2.09166m 8.69127
25 137.6  2.11952m 3.26316 126 632.5  2.09158m 8.75216
26 142.5  2.11800m 3.29993 127 637.4  2.09150m 8.81312
27 147.4  2.11668m 3.33769 128 642.3  2.09142m 8.87411
28 152.3  2.11591m 3.37644 129 647.2  2.09133m 8.93511
29 157.2  2.11561m 3.4166 130 652.1  2.09126m 8.99628
30 162.1  2.11509m 3.45729 131 657  2.09120m 9.05744
31 167  2.11436m 3.49851 132 661.9  2.09113m 9.11863
32 171.9  2.11388m 3.54009 133 666.8  2.09104m 9.17981
33 176.8  2.11313m 3.58254 134 671.7  2.09098m 9.24109
34 181.7  2.11246m 3.62559 135 676.6  2.09092m 9.30243
35 186.6  2.11175m 3.66924 136 681.5  2.09084m 9.36371
36 191.5  2.11114m 3.71349 137 686.4  2.09078m 9.42508
37 196.4  2.11053m 3.75834 138 691.3  2.09071m 9.48648
38 201.3  2.10996m 3.80365 139 696.2  2.09064m 9.54792
39 206.2  2.10943m 3.84938 140 701.1  2.09059m 9.60942
40 211.1  2.10892m 3.89566 141 706  2.09053m 9.67095
41 216  2.10840m 3.94244 142 710.9  2.09046m 9.73246
42 220.9  2.10789m 3.98974 143 715.8  2.09040m 9.79407
43 225.8  2.10729m 4.03729 144 720.7  2.09034m 9.85567
44 230.7  2.10673m 4.08529 145 725.6  2.09027m 9.91726
45 235.6  2.10605m 4.13362 146 730.5  2.09017m 9.97895
46 240.5  2.10528m 4.18218 147 735.4  2.09010m 10.0406
47 245.4  2.10462m 4.23123 148 740.3  2.09005m 10.1023
48 250.3  2.10417m 4.2809 149 745.2  2.08997m 10.164
49 255.2  2.10371m 4.33109 150 750.1  2.08996m 10.2259
50 260.1  2.10346m 4.38187 151 755  2.08989m 10.2877
51 265  2.10326m 4.43307 152 759.9  2.08986m 10.3497
52 269.9  2.10316m 4.48473 153 764.8  2.08979m 10.4115
53 274.8  2.10312m 4.53665 154 769.7  2.08974m 10.4734
54 279.7  2.10299m 4.58874 155 774.6  2.08971m 10.5354
55 284.6  2.10273m 4.64093 156 779.5  2.08964m 10.5973
56 289.5  2.10243m 4.69342 157 784.4  2.08959m 10.6593
57 294.4  2.10205m 4.74596 158 789.3  2.08956m 10.7213
58 299.3  2.10173m 4.79893 159 794.2  2.08951m 10.7834
59 304.2  2.10137m 4.85165 160 799.1  2.08948m 10.8455
60 309.1  2.10107m 4.90508 161 804  2.08945m 10.9076
61 314  2.10077m 4.95875 162 808.9  2.08940m 10.9697
62 318.9  2.10049m 5.01266 163 813.8  2.08936m 11.0319
63 323.8  2.10022m 5.06679 164 818.7  2.08930m 11.094
64 328.7  2.09993m 5.12113 165 823.6  2.08929m 11.1563
65 333.6  2.09967m 5.17571 166 828.5  2.08923m 11.2184
66 338.5  2.09944m 5.23055 167 833.4  2.08923m 11.2808
67 343.4  2.09916m 5.2855 168 838.3  2.08918m 11.343
68 348.3  2.09889m 5.34063 169 843.2  2.08914m 11.4052
69 353.2  2.09868m 5.3961 170 848.1  2.08908m 11.4674
70 358.1  2.09843m 5.45164 171 853  2.08910m 11.53
71 363  2.09818m 5.50738 172 857.9  2.08905m 11.5922
72 367.9  2.09795m 5.5633 173 862.8  2.08904m 11.6547
73 372.8  2.09772m 5.61938 174 867.7  2.08899m 11.717
74 377.7  2.09753m 5.67571 175 872.6  2.08897m 11.7794
75 382.6  2.09729m 5.73209 176 877.5  2.08896m 11.842
76 387.5  2.09709m 5.78871 177 882.4  2.08892m 11.9044
77 392.4  2.09687m 5.84546 178 887.3  2.08889m 11.9668
78 397.3  2.09666m 5.90234 179 892.2  2.08886m 12.0293
79 402.2  2.09648m 5.95944 180 897.1  2.08884m 12.0918
80 407.1  2.09629m 6.01664 181 902  2.08882m 12.1543
81 412  2.09610m 6.07396 182 906.9  2.08878m 12.2168
82 416.9  2.09594m 6.13147 183 911.8  2.08877m 12.2794
83 421.8  2.09578m 6.18907 184 916.7  2.08875m 12.342
84 426.7  2.09561m 6.24682 185 921.6  2.08871m 12.4046
85 431.6  2.09545m 6.30466 186 926.5  2.08869m 12.4672
86 436.5  2.09529m 6.36259 187 931.4  2.08868m 12.5299
87 441.4  2.09521m 6.42089 188 936.3  2.08863m 12.5924
88 446.3  2.09501m 6.47897 189 941.2  2.08861m 12.655
89 451.2  2.09483m 6.53722 190 946.1  2.08859m 12.7177
90 456.1  2.09473m 6.59574 191 951  2.08856m 12.7803
91 461  2.09460m 6.65435 192 955.9  2.08853m 12.843
92 465.9  2.09445m 6.7129 193 960.8  2.08843m 12.905
93 470.8  2.09435m 6.77173 194 965.7  2.08840m 12.9677
94 475.7  2.09422m 6.83058 195 970.6  2.08837m 13.0304
95 480.6  2.09411m 6.88955 196 975.5  2.08834m 13.0931
96 485.5  2.09401m 6.94865 197 980.4  2.08829m 13.1557
97 490.4  2.09392m 7.00785 198 985.3  2.08825m 13.2184
98 495.3  2.09381m 7.06709 199 990.2  2.08825m 13.2813
99 500.2  2.09374m 7.12651 200 995.1  2.08821m 13.344
100 505.1  2.09366m 7.18592 201  1.00000k  2.08815m 13.4067
101 510  2.09358m 7.24542 　 　 　 　
Table 5 X-axis Detailed frequency data of inductance Ls and reactance Z
Y-axis Inductance Ls, reactance Z measurement (test level 5V)
Ls MIN[H] FREQ[Hz] Ls MAX[H] FREQ[Hz]
 2.12365m  1.00000k  2.18070m 20
Z  MIN[Ω] FREQ[Hz] Z  MAX[Ω] FREQ[Hz]
2.70566 20 13.6211  1.00000k
Table 6 Y-axis inductance Ls and reactance Z data
　
Y-axis Inductance Ls, reactance Z-scan measurement
POINTS FREQ[Hz] Ls Z  POINTS FREQ[Hz] Ls Z 
1 20  2.18070m 2.70566 102 514.9  2.12652m 7.39905
2 24.9  2.17429m 2.7129 103 519.8  2.12650m 7.45994
3 29.8  2.17272m 2.72222 104 524.7  2.12647m 7.52087
4 34.7  2.16839m 2.733 105 529.6  2.12645m 7.5819
5 39.6  2.16507m 2.7455 106 534.5  2.12642m 7.64297
6 44.5  2.16176m 2.7593 107 539.4  2.12640m 7.70412
7 49.4  2.15583m 2.77432 108 544.3  2.12646m 7.76512
8 54.3  2.15851m 2.79213 109 549.2  2.12642m 7.82633
9 59.2  2.15877m 2.81065 110 554.1  2.12636m 7.88761
10 64.1  2.15693m 2.83084 111 559  2.12631m 7.94896
11 69  2.15501m 2.85226 112 563.9  2.12627m 8.01036
12 73.9  2.15313m 2.87502 113 568.8  2.12622m 8.07183
13 78.8  2.15125m 2.89895 114 573.7  2.12617m 8.13334
14 83.7  2.14846m 2.92372 115 578.6  2.12614m 8.19496
15 88.6  2.14620m 2.94993 116 583.5  2.12609m 8.25659
16 93.5  2.14593m 2.97776 117 588.4  2.12603m 8.31823
17 98.4  2.14803m 3.00704 118 593.3  2.12599m 8.38
18 103.3  2.14712m 3.03708 119 598.2  2.12595m 8.4418
19 108.2  2.14613m 3.06824 120 603.1  2.12591m 8.50369
20 113.1  2.14524m 3.1005 121 608  2.12585m 8.56554
21 118  2.14442m 3.13376 122 612.9  2.12581m 8.62754
22 122.9  2.14368m 3.1678 123 617.8  2.12575m 8.68952
23 127.8  2.14285m 3.20255 124 622.7  2.12571m 8.75159
24 132.7  2.14187m 3.23817 125 627.6  2.12566m 8.81369
25 137.6  2.14042m 3.27455 126 632.5  2.12561m 8.8758
26 142.5  2.13905m 3.31174 127 637.4  2.12556m 8.93798
27 147.4  2.13808m 3.34998 128 642.3  2.12552m 9.00025
28 152.3  2.13784m 3.38957 129 647.2  2.12547m 9.06251
29 157.2  2.13793m 3.43044 130 652.1  2.12543m 9.12485
30 162.1  2.13825m 3.47202 131 657  2.12538m 9.18718
31 167  2.13800m 3.51391 132 661.9  2.12533m 9.24957
32 171.9  2.13799m 3.55633 133 666.8  2.12529m 9.31203
33 176.8  2.13752m 3.59947 134 671.7  2.12526m 9.37455
34 181.7  2.13711m 3.64326 135 676.6  2.12522m 9.43707
35 186.6  2.13673m 3.68773 136 681.5  2.12517m 9.49958
36 191.5  2.13635m 3.73278 137 686.4  2.12514m 9.56223
37 196.4  2.13599m 3.77841 138 691.3  2.12509m 9.62484
38 201.3  2.13567m 3.82459 139 696.2  2.12506m 9.68752
39 206.2  2.13538m 3.8712 140 701.1  2.12502m 9.75021
40 211.1  2.13507m 3.91832 141 706  2.12499m 9.81298
41 216  2.13474m 3.96593 142 710.9  2.12495m 9.87573
42 220.9  2.13437m 4.014 143 715.8  2.12491m 9.93853
43 225.8  2.13390m 4.06247 144 720.7  2.12479m 10.0012
44 230.7  2.13328m 4.11117 145 725.6  2.12478m 10.0641
45 235.6  2.13261m 4.16023 146 730.5  2.12474m 10.127
46 240.5  2.13197m 4.20975 147 735.4  2.12472m 10.19
47 245.4  2.13151m 4.25986 148 740.3  2.12467m 10.2529
48 250.3  2.13126m 4.31064 149 745.2  2.12463m 10.3158
49 255.2  2.13100m 4.36188 150 750.1  2.12461m 10.3789
50 260.1  2.13099m 4.41379 151 755  2.12459m 10.442
51 265  2.13102m 4.46614 152 759.9  2.12456m 10.5051
52 269.9  2.13119m 4.51891 153 764.8  2.12453m 10.5681
53 274.8  2.13141m 4.57204 154 769.7  2.12451m 10.6313
54 279.7  2.13161m 4.62546 155 774.6  2.12448m 10.6945
55 284.6  2.13165m 4.67898 156 779.5  2.12445m 10.7576
56 289.5  2.13157m 4.7326 157 784.4  2.12442m 10.8208
57 294.4  2.13135m 4.78635 158 789.3  2.12440m 10.8841
58 299.3  2.13112m 4.84032 159 794.2  2.12437m 10.9473
59 304.2  2.13088m 4.89412 160 799.1  2.12435m 11.0106
60 309.1  2.13068m 4.94864 161 804  2.12434m 11.074
61 314  2.13053m 5.00349 162 808.9  2.12429m 11.1372
62 318.9  2.13035m 5.05852 163 813.8  2.12429m 11.2006
63 323.8  2.13018m 5.11378 164 818.7  2.12426m 11.2639
64 328.7  2.13003m 5.1693 165 823.6  2.12425m 11.3274
65 333.6  2.12987m 5.22503 166 828.5  2.12423m 11.3908
66 338.5  2.12973m 5.281 167 833.4  2.12422m 11.4542
67 343.4  2.12957m 5.33713 168 838.3  2.12422m 11.5178
68 348.3  2.12944m 5.39351 169 843.2  2.12418m 11.5812
69 353.2  2.12929m 5.45006 170 848.1  2.12419m 11.6448
70 358.1  2.12916m 5.50682 171 853  2.12417m 11.7083
71 363  2.12903m 5.56378 172 857.9  2.12416m 11.7719
72 367.9  2.12891m 5.6209 173 862.8  2.12414m 11.8355
73 372.8  2.12876m 5.67816 174 867.7  2.12413m 11.8991
74 377.7  2.12863m 5.73562 175 872.6  2.12412m 11.9627
75 382.6  2.12850m 5.79322 176 877.5  2.12410m 12.0263
76 387.5  2.12838m 5.851 177 882.4  2.12411m 12.09
77 392.4  2.12826m 5.90896 178 887.3  2.12409m 12.1537
78 397.3  2.12813m 5.96705 179 892.2  2.12409m 12.2174
79 402.2  2.12802m 6.0253 180 897.1  2.12408m 12.2812
80 407.1  2.12793m 6.08375 181 902  2.12406m 12.3449
81 412  2.12782m 6.14231 182 906.9  2.12405m 12.4086
82 416.9  2.12772m 6.20102 183 911.8  2.12404m 12.4723
83 421.8  2.12763m 6.25987 184 916.7  2.12403m 12.5361
84 426.7  2.12753m 6.31881 185 921.6  2.12402m 12.5999
85 431.6  2.12744m 6.37788 186 926.5  2.12400m 12.6637
86 436.5  2.12735m 6.43709 187 931.4  2.12398m 12.7274
87 441.4  2.12727m 6.49641 188 936.3  2.12397m 12.7913
88 446.3  2.12719m 6.55585 189 941.2  2.12395m 12.855
89 451.2  2.12711m 6.61539 190 946.1  2.12395m 12.919
90 456.1  2.12703m 6.67504 191 951  2.12395m 12.9829
91 461  2.12695m 6.73483 192 955.9  2.12393m 13.0468
92 465.9  2.12688m 6.79468 193 960.8  2.12384m 13.1099
93 470.8  2.12682m 6.85468 194 965.7  2.12381m 13.1738
94 475.7  2.12677m 6.91481 195 970.6  2.12380m 13.2377
95 480.6  2.12672m 6.97504 196 975.5  2.12378m 13.3016
96 485.5  2.12666m 7.03531 197 980.4  2.12376m 13.3655
97 490.4  2.12663m 7.09573 198 985.3  2.12374m 13.4294
98 495.3  2.12659m 7.15622 199 990.2  2.12372m 13.4934
99 500.2  2.12658m 7.21684 200 995.1  2.12371m 13.5574
100 505.1  2.12656m 7.2775 201  1.00000k  2.12365m 13.6211
101 510  2.12654m 7.33823 　 　 　 　
Table 7 Y-axis Detailed frequency data of inductance Ls and reactance Z

 

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