Quality Inspection Report of Customized One-dimensional Helmholtz Coil

Home ꄲ Dexinmag News ꄲ Helmholtz Coil ꄲ Quality Inspection Report of Customized One-dimensional Helmholtz Coil

Overall Dimensions: 560mm(L) x 560mm(W) x 582mm(H)
Coil spacing: 115mm
Inside diameter of coil: 230mm
Outside diameter of coil: 300mm
Weight: 41.6kg

Performance test report
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:		DXHC Customized
Product Name: One-dimensional Helmholtz coil				Test time:		July 31, 2023
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℃		2m		0~30000nT
The wire specification is φ0.7, and the number of turns on one side is 1120
Table 1 Measurement environment data

Magnetic field parameter test
1. Using the device
DX-F2031 power supply DX-180 Gauss Meter
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
Measuring point position		Display current (A)		Display voltage Voltage (V)		Magnetic field strength（Gs）
0，0，0		0.5		-		26.53
0，0，0		1		-		53.18
Table 2 Magnetic field strength data

Electrical parameter test
1. Using equipment
Digital multimeter Impedance analyzer
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 temperature	Product temperature	Measuring resistance		ResistanceR@20℃		ResistanceR@85℃
26.0℃	26.0℃	86.160Ω		83.846Ω		108.916Ω
Table 3 Resistance R data

Inductance Ls, reactance Z measurement (test level 5V)
Ls MIN[H]		FREQ[Hz]		Ls MAX[H]		FREQ[Hz]
126.709m		1.00000k		352.390m		20
Z MIN[Ω]		FREQ[Hz]		Z MAX[Ω]		FREQ[Hz]
133.593		20		861.039		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	352.390m	133.593	102	514.9	141.583m	522.935
2	24.9	306.107m	137.92	103	519.8	141.327m	526.447
3	29.8	277.408m	141.556	104	524.7	141.074m	529.956
4	34.7	258.449m	144.929	105	529.6	140.825m	533.458
5	39.6	245.199m	148.236	106	534.5	140.581m	536.964
6	44.5	235.520m	151.576	107	539.4	140.341m	540.468
7	49.4	228.152m	154.993	108	544.3	140.101m	543.957
8	54.3	222.362m	158.505	109	549.2	139.868m	547.455
9	59.2	217.651m	162.12	110	554.1	139.635m	550.941
10	64.1	213.736m	165.839	111	559	139.407m	554.429
11	69	210.393m	169.65	112	563.9	139.182m	557.914
12	73.9	207.494m	173.55	113	568.8	138.959m	561.393
13	78.8	204.928m	177.526	114	573.7	138.741m	564.874
14	83.7	202.628m	181.571	115	578.6	138.525m	568.352
15	88.6	200.538m	185.677	116	583.5	138.311m	571.823
16	93.5	198.616m	189.833	117	588.4	138.101m	575.295
17	98.4	196.828m	194.035	118	593.3	137.894m	578.768
18	103.3	195.164m	198.277	119	598.2	137.689m	582.235
19	108.2	193.593m	202.545	120	603.1	137.488m	585.703
20	113.1	192.105m	206.838	121	608	137.288m	589.165
21	118	190.688m	211.149	122	612.9	137.091m	592.628
22	122.9	189.332m	215.471	123	617.8	136.896m	596.085
23	127.8	188.028m	219.8	124	622.7	136.705m	599.543
24	132.7	186.772m	224.132	125	627.6	136.516m	603.001
25	137.6	185.558m	228.465	126	632.5	136.328m	606.451
26	142.5	184.382m	232.794	127	637.4	136.144m	609.903
27	147.4	183.244m	237.121	128	642.3	135.961m	613.351
28	152.3	182.136m	241.438	129	647.2	135.779m	616.796
29	157.2	181.059m	245.745	130	652.1	135.601m	620.239
30	162.1	180.009m	250.038	131	657	135.426m	623.686
31	167	178.986m	254.318	132	661.9	135.252m	627.127
32	171.9	177.990m	258.585	133	666.8	135.080m	630.567
33	176.8	177.018m	262.838	134	671.7	134.910m	634.003
34	181.7	176.066m	267.069	135	676.6	134.741m	637.435
35	186.6	175.137m	271.285	136	681.5	134.575m	640.866
36	191.5	174.229m	275.482	137	686.4	134.409m	644.293
37	196.4	173.339m	279.659	138	691.3	134.247m	647.722
38	201.3	172.471m	283.819	139	696.2	134.087m	651.153
39	206.2	171.621m	287.959	140	701.1	133.927m	654.575
40	211.1	170.791m	292.083	141	706	133.770m	657.998
41	216	169.975m	296.183	142	710.9	133.614m	661.421
42	220.9	169.178m	300.265	143	715.8	133.461m	664.843
43	225.8	168.398m	304.331	144	720.7	133.309m	668.26
44	230.7	167.635m	308.375	145	725.6	133.159m	671.681
45	235.6	166.888m	312.402	146	730.5	133.009m	675.095
46	240.5	166.147m	316.396	147	735.4	132.862m	678.506
47	245.4	165.432m	320.389	148	740.3	132.716m	681.916
48	250.3	164.729m	324.361	149	745.2	132.572m	685.328
49	255.2	164.043m	328.319	150	750.1	132.430m	688.744
50	260.1	163.370m	332.259	151	755	132.290m	692.156
51	265	162.711m	336.182	152	759.9	132.151m	695.563
52	269.9	162.065m	340.087	153	764.8	132.012m	698.961
53	274.8	161.434m	343.982	154	769.7	131.875m	702.37
54	279.7	160.815m	347.859	155	774.6	131.740m	705.773
55	284.6	160.208m	351.723	156	779.5	131.607m	709.177
56	289.5	159.615m	355.571	157	784.4	131.475m	712.583
57	294.4	159.033m	359.408	158	789.3	131.343m	715.981
58	299.3	158.464m	363.232	159	794.2	131.213m	719.375
59	304.2	157.905m	367.038	160	799.1	131.084m	722.773
60	309.1	157.357m	370.834	161	804	130.957m	726.167
61	314	156.821m	374.617	162	808.9	130.831m	729.561
62	318.9	156.296m	378.391	163	813.8	130.706m	732.957
63	323.8	155.780m	382.151	164	818.7	130.582m	736.344
64	328.7	155.275m	385.902	165	823.6	130.460m	739.738
65	333.6	154.780m	389.64	166	828.5	130.339m	743.129
66	338.5	154.293m	393.368	167	833.4	130.219m	746.52
67	343.4	153.817m	397.087	168	838.3	130.099m	749.901
68	348.3	153.349m	400.795	169	843.2	129.982m	753.287
69	353.2	152.892m	404.496	170	848.1	129.865m	756.671
70	358.1	152.441m	408.186	171	853	129.748m	760.049
71	363	152.000m	411.867	172	857.9	129.633m	763.428
72	367.9	151.566m	415.537	173	862.8	129.520m	766.812
73	372.8	151.141m	419.203	174	867.7	129.406m	770.187
74	377.7	150.724m	422.859	175	872.6	129.296m	773.569
75	382.6	150.316m	426.511	176	877.5	129.185m	776.944
76	387.5	149.914m	430.152	177	882.4	129.075m	780.32
77	392.4	149.519m	433.788	178	887.3	128.966m	783.692
78	397.3	149.133m	437.417	179	892.2	128.859m	787.072
79	402.2	148.751m	441.035	180	897.1	128.751m	790.437
80	407.1	148.378m	444.654	181	902	128.646m	793.808
81	412	148.011m	448.262	182	906.9	128.540m	797.178
82	416.9	147.650m	451.864	183	911.8	128.436m	800.547
83	421.8	147.296m	455.459	184	916.7	128.334m	803.918
84	426.7	146.947m	459.051	185	921.6	128.233m	807.294
85	431.6	146.606m	462.64	186	926.5	128.132m	810.663
86	436.5	146.270m	466.221	187	931.4	128.031m	814.025
87	441.4	145.939m	469.798	188	936.3	127.931m	817.39
88	446.3	145.615m	473.371	189	941.2	127.833m	820.758
89	451.2	145.296m	476.939	190	946.1	127.735m	824.12
90	456.1	144.982m	480.501	191	951	127.638m	827.48
91	461	144.673m	484.06	192	955.9	127.542m	830.842
92	465.9	144.370m	487.616	193	960.8	127.445m	834.191
93	470.8	144.070m	491.163	194	965.7	127.350m	837.545
94	475.7	143.776m	494.707	195	970.6	127.257m	840.911
95	480.6	143.487m	498.252	196	975.5	127.164m	844.271
96	485.5	143.202m	501.789	197	980.4	127.072m	847.627
97	490.4	142.922m	505.323	198	985.3	126.980m	850.983
98	495.3	142.645m	508.85	199	990.2	126.889m	854.34
99	500.2	142.374m	512.377	200	995.1	126.799m	857.693
100	505.1	142.107m	515.901	201	1.00000k	126.709m	861.039
101	510	141.843m	519.423
Table 5 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.