Hình F.4 - Sơ đồ bố trí điểm đo phương pháp xây dựng đường cong điện trở
Đo điện trở nối đất tại mỗi vị trí của điện cực đo Z, vẽ đường cong điện trở từ các kết quả đo. Vẽ đường cong điện trở cho phép phát hiện các điểm đo nghi ngờ cần kiểm tra lại.
Bảng F.3 - Giá trị Pt/XY phụ thuộc hệ số độ dốc và khoảng cách điện cực đo điện thế Pt
|
Pt
|
|
0,00
|
0,01
|
0,02
|
0,03
|
0,04
|
0,05
|
0,06
|
0,07
|
0,08
|
0,09
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
11
|
0,40
|
0.6432
|
0.6431
|
0.6429
|
0.6428
|
0.6426
|
0.6425
|
0.6423
|
0.6422
|
0.6420
|
0.6420
|
0.41
|
0.6418
|
0.6417
|
0.6415
|
0.6414
|
0.6412
|
0.6411
|
0.6410
|
0.6408
|
0.6407
|
0.6405
|
0.42
|
0.6404
|
0.6403
|
0.6401
|
0.6400
|
0.6398
|
0.6397
|
0.6395
|
0.6394
|
0.6393
|
0.6391
|
0.43
|
0.6390
|
0.6388
|
0.6387
|
0.6385
|
0.6384
|
0.6383
|
0.6381
|
0.6380
|
0.6378
|
0.6377
|
0.44
|
0.6375
|
0.6374
|
0.6372
|
0.6371
|
0.6370
|
0.6368
|
0.6367
|
0.6365
|
0.6364
|
0.6362
|
0.45
|
0.6361
|
0.6359
|
0.6358
|
0.6357
|
0.6355
|
0.6354
|
0.6352
|
0.6351
|
0.6349
|
0.6348
|
0.46
|
0.6346
|
0.6345
|
0.6344
|
0.6342
|
0.6341
|
0.6339
|
0.6338
|
0.6336
|
0.6335
|
0.6333
|
0.47
|
0,6332
|
0,6330
|
0,6329
|
0,6328
|
0,6326
|
0,6325
|
0,6323
|
0,6322
|
0,6320
|
0,6319
|
0.48
|
0.6317
|
0.6316
|
0.6314
|
0.6313
|
0.6311
|
0.6310
|
0.6308
|
0.6307
|
0.6306
|
0.6304
|
0.49
|
0.6303
|
0.6301
|
0.6300
|
0.6298
|
0.6297
|
0.6295
|
0.6294
|
0.6292
|
0.6291
|
0.6289
|
0.50
|
0.6288
|
0.6286
|
0.6285
|
0.6283
|
0.6282
|
0.6280
|
0.6279
|
0.6277
|
0.6276
|
0.6274
|
0.51
|
0.6273
|
0.6271
|
0.6270
|
0.6268
|
0.6267
|
0.6266
|
0.6264
|
0.6263
|
0.6261
|
0.6260
|
0.52
|
0.6258
|
0.6257
|
0.6255
|
0.6254
|
0.6252
|
0.6251
|
0.6249
|
0.6248
|
0.6246
|
0.6245
|
0.53
|
0.6243
|
0.6242
|
0.6240
|
0.6239
|
0.6237
|
0.6235
|
0.6234
|
0.6232
|
0.6231
|
0.6229
|
0.54
|
0.6228
|
0.6226
|
0.6225
|
0.6223
|
0.6222
|
0.6220
|
0.6219
|
0.6217
|
0.6216
|
0.6214
|
0.55
|
0.6213
|
0.6211
|
0.6210
|
0.6208
|
0.6207
|
0.6205
|
0.6204
|
0.6202
|
0.6201
|
0.6199
|
0.56
|
0.6198
|
0.6196
|
0.6194
|
0.6193
|
0.6191
|
0.6190
|
0.6188
|
0.6187
|
0.6185
|
0.6184
|
0.57
|
0.6182
|
0.6181
|
0.6179
|
0.6178
|
0.6176
|
0.6174
|
0.6173
|
0.6171
|
0.6170
|
0.6168
|
0.58
|
0.6167
|
0.6165
|
0.6164
|
0.6162
|
0.6161
|
0.6159
|
0.6157
|
0.6156
|
0.6154
|
0.6153
|
0.59
|
0.6151
|
0.6150
|
0.6148
|
0.6147
|
0.6145
|
0.6143
|
0.6142
|
0.6140
|
0.6139
|
0.6137
|
0.60
|
0.6136
|
0.6134
|
0.6133
|
0.6131
|
0.6129
|
0.6128
|
0.6126
|
0.6125
|
0.6123
|
0.6122
|
0.61
|
0.6120
|
0.6118
|
0.6117
|
0.6115
|
0.6114
|
0.6112
|
0.6111
|
0.6109
|
0.6107
|
0.6106
|
0.62
|
0.6104
|
0.6103
|
0.6101
|
0.6099
|
0.6098
|
0.6096
|
0.6095
|
0.6093
|
0.6092
|
0.6090
|
0.63
|
0.6088
|
0.6087
|
0.6085
|
0.6084
|
0.6082
|
0.6080
|
0.6079
|
0.6077
|
0.6076
|
0.6074
|
0.64
|
0.6072
|
0.6071
|
0.6069
|
0.6068
|
0.6066
|
0.6064
|
0.6063
|
0.6061
|
0.6060
|
0.6058
|
0.65
|
0.6056
|
0.6055
|
0.6053
|
0.6052
|
0.6050
|
0.6048
|
0.6047
|
0.6045
|
0.6043
|
0.6042
|
0.66
|
0.6040
|
0.6039
|
0.6037
|
0.6035
|
0.6034
|
0.6032
|
0.6031
|
0.6029
|
0.6027
|
0.6026
|
0.67
|
0.6024
|
0.6022
|
0.6021
|
0.6019
|
0.6017
|
0.6016
|
0.6014
|
0.6013
|
0.6011
|
0.6009
|
0.68
|
0.6008
|
0.6006
|
0.6004
|
0.6003
|
0.6001
|
0.5999
|
0.5998
|
0.5996
|
0.5994
|
0.5993
|
0.69
|
0.5991
|
0.5990
|
0.5988
|
0.5986
|
0.5985
|
0.5983
|
0.5981
|
0.5980
|
0.5978
|
0.5976
|
0.70
|
0.5975
|
0.5973
|
0.5971
|
0.5970
|
0.5968
|
0.5966
|
0.5965
|
0.5963
|
0.5961
|
0.5960
|
0.71
|
0.5958
|
0.5956
|
0.5955
|
0.5953
|
0.5951
|
0.5950
|
0.5948
|
0.5946
|
0.5945
|
0.5943
|
0.72
|
0.5941
|
0.5940
|
0.5938
|
0.5936
|
0.5934
|
0.5933
|
0.5931
|
0.5929
|
0.5928
|
0.5926
|
0.73
|
0.5924
|
0.5923
|
0.5921
|
0.5919
|
0.5918
|
0.5916
|
0.5914
|
0.5912
|
0.5911
|
0.5909
|
0.74
|
0.5907
|
0.5906
|
0.5904
|
0.5902
|
0.5901
|
0.5899
|
0.5897
|
0.5895
|
0.5894
|
0.5892
|
0.75
|
0.5890
|
0.5889
|
0.5887
|
0.5885
|
0.5883
|
0.5882
|
0.5880
|
0.5878
|
0.5876
|
0.5875
|
0.76
|
0.5873
|
0.5871
|
0.5870
|
0.5868
|
0.5866
|
0.5864
|
0.5863
|
0.5861
|
0.5859
|
0.5857
|
0.77
|
0.5856
|
0.5854
|
0.5852
|
0.5850
|
0.5849
|
0.5847
|
0.5845
|
0.5843
|
0.5842
|
0.5840
|
0.78
|
0.5838
|
0.5836
|
0.5835
|
0.5833
|
0.5831
|
0.5829
|
0.5828
|
0.5826
|
0.5824
|
0.5822
|
0.79
|
0.5821
|
0.5819
|
0.5817
|
0.5815
|
0.5813
|
0.5812
|
0.5810
|
0.5808
|
0.5806
|
0.5805
|
0.80
|
0.5803
|
0.5801
|
0.5799
|
0.5797
|
0.5796
|
0.5794
|
0.5792
|
0.5790
|
0.5789
|
0.5787
|
0.81
|
0.5785
|
0.5783
|
0.5781
|
0.5780
|
0.5778
|
0.5776
|
0.5774
|
0.5772
|
0.5771
|
0.5769
|
0.82
|
0.5767
|
0.5765
|
0.5763
|
0.5762
|
0.5760
|
0.5758
|
0.5756
|
0.5754
|
0.5752
|
0.5751
|
0.83
|
0.5749
|
0.5747
|
0.5745
|
0.5743
|
0.5742
|
0.5740
|
0.5738
|
0.5736
|
0.5734
|
0.5732
|
0.84
|
0.5731
|
0.5729
|
0.5727
|
0.5725
|
0.5723
|
0.5721
|
0.5720
|
0.5718
|
0.5713
|
0.5714
|
0.85
|
0.5712
|
0.5710
|
0.5708
|
0.5707
|
0.5705
|
0.5703
|
0.5701
|
0.5699
|
0.5697
|
0.5695
|
0.86
|
0.5694
|
0.5692
|
0.5690
|
0.5688
|
0.5686
|
0.5684
|
0.5682
|
0.5680
|
0.5679
|
0.5677
|
0.87
|
0.5675
|
0.5673
|
0.5671
|
0.5669
|
0.5667
|
0.5665
|
0.5664
|
0.5662
|
0.5660
|
0.5658
|
0.88
|
0.5656
|
0.5654
|
0.5652
|
0.5650
|
0.5648
|
0.5646
|
0.5645
|
0.5643
|
0.5641
|
0.5639
|
0.89
|
0.5637
|
0.5635
|
0.5633
|
0.5631
|
0.5629
|
0.5627
|
0.5625
|
0.5624
|
0.5622
|
0.5620
|
0.90
|
0.5618
|
0.5616
|
0.5614
|
0.5612
|
0.561
|
0.5608
|
0.5606
|
0.5604
|
0.5602
|
0.5600
|
0.91
|
0.5598
|
0.5596
|
0.5595
|
0.5593
|
0.5591
|
0.5589
|
0.5587
|
0.5585
|
0.5583
|
0.5581
|
0.92
|
0.5579
|
0.5577
|
0.5575
|
0.5573
|
0.5571
|
0.5569
|
0.5567
|
0.5565
|
0.5563
|
0.5561
|
0.93
|
0.5559
|
0.5557
|
0.5555
|
0.5553
|
0.5551
|
0.5549
|
0.5547
|
0.5545
|
0.5543
|
0.5541
|
0.94
|
0.5539
|
0.5537
|
0.5535
|
0.5533
|
0.5531
|
0.5529
|
0.5527
|
0.5525
|
0.5523
|
0.5521
|
0.95
|
0.5519
|
0.5517
|
0.5515
|
0.5513
|
0.5511
|
0.5509
|
0.5507
|
0.5505
|
0.5503
|
0.5501
|
0.96
|
0.5499
|
0.5497
|
0.5495
|
0.5493
|
0.5491
|
0.5489
|
0.5487
|
0.5485
|
0.5483
|
0.5481
|
0.97
|
0.5479
|
0.5476
|
0.5474
|
0.5472
|
0.5470
|
0.5468
|
0.5466
|
0.5464
|
0.5462
|
0.5460
|
0.98
|
0.5458
|
0.5456
|
0.5454
|
0.5452
|
0.5450
|
0.5447
|
0.5445
|
0.5443
|
0.5441
|
0.5439
|
0.99
|
0.5437
|
0.5435
|
0.5433
|
0.5431
|
0.5429
|
0.5427
|
0.5424
|
0.5422
|
0.5420
|
0.5418
|
1.00
|
0.5416
|
0.5414
|
0.5412
|
0.5410
|
0.5408
|
0.5405
|
0.5403
|
0.5401
|
0.5399
|
0.5397
|
1.01
|
0.5395
|
0.5393
|
0.5390
|
0.5388
|
0.5386
|
0.5384
|
0.5382
|
0.5380
|
0.5378
|
0.5375
|
1.02
|
0.5373
|
0.5371
|
0.5369
|
0.5367
|
0.5365
|
0.5362
|
0.5360
|
0.5358
|
0.5356
|
0.5354
|
1.03
|
0.5352
|
0.5349
|
0.5347
|
0.5345
|
0.5343
|
0.5341
|
0.5338
|
0.5336
|
0.5334
|
0.5332
|
1.04
|
0.5330
|
0.5327
|
0.5325
|
0.5323
|
0.5321
|
0.5319
|
0.5316
|
0.5314
|
0.5312
|
0.5310
|
1.05
|
0.5307
|
0.5305
|
0.5303
|
0.5301
|
0.5298
|
0.5296
|
0.5294
|
0.5292
|
0.5290
|
0.5287
|
1.06
|
0.5285
|
0.5283
|
0.5281
|
0.5278
|
0.5276
|
0.5274
|
0.5271
|
0.5269
|
0.5267
|
0.5265
|
1.07
|
0.5262
|
0.5260
|
0.5258
|
0.5256
|
0.5253
|
0.5251
|
0.5249
|
0.5246
|
0.5244
|
0.5242
|
1.08
|
0.5239
|
0.5237
|
0.5235
|
0.5233
|
0.5230
|
0.5228
|
0.5226
|
0.5223
|
0.5221
|
0.5219
|
1.09
|
0.5216
|
0.5214
|
0.5212
|
0.5209
|
0.5207
|
0.5205
|
0.5202
|
0.5200
|
0.5197
|
0.5195
|
1.10
|
0.5193
|
0.5190
|
0.5188
|
0.5186
|
0.5183
|
0.5181
|
0.5179
|
0.5176
|
0.5174
|
0.5171
|
1.11
|
0.5169
|
0.5167
|
0.5164
|
0.5162
|
0.5159
|
0.5157
|
0.5155
|
0.5152
|
0.5150
|
0.5147
|
1.12
|
0.5145
|
0.5143
|
0.5140
|
0.5138
|
0.5135
|
0.5133
|
0.5130
|
0.5128
|
0.5126
|
0.5123
|
1.13
|
0.5121
|
0.5118
|
0.5116
|
0.5113
|
0.5111
|
0.5108
|
0.5106
|
0.5103
|
0.5101
|
0.5099
|
1.14
|
0.5096
|
0.5094
|
0.5091
|
0.5089
|
0.5086
|
0.5084
|
0.5081
|
0.5079
|
0.5076
|
0.5074
|
1.15
|
0.5071
|
0.5069
|
0.5066
|
0.5064
|
0.5061
|
0.5059
|
0.5056
|
0.5053
|
0.5051
|
0.5048
|
1.16
|
0.5046
|
0.5043
|
0.5041
|
0.5038
|
0.5036
|
0.5033
|
0.5031
|
0.5028
|
0.5025
|
0.5023
|
1.17
|
0.5020
|
0.5018
|
0.5015
|
0.5013
|
0.5010
|
0.5007
|
0.5005
|
0.5002
|
0.5000
|
0.4997
|
1.18
|
0.4994
|
0.4992
|
0.4989
|
0.4987
|
0.4984
|
0.4981
|
0.4979
|
0.4976
|
0.4973
|
0.4971
|
1.19
|
0.4968
|
0.4965
|
0.4963
|
0.4960
|
0.4957
|
0.4955
|
0.4952
|
0.4949
|
0.4947
|
0.4944
|
1.20
|
0.4941
|
0.4939
|
0.4936
|
0.4933
|
0.4931
|
0.4928
|
0.4925
|
0.4923
|
0.4920
|
0.4917
|
1.21
|
0.4914
|
0.4912
|
0.4909
|
0.4906
|
0.4903
|
0.4901
|
0.4898
|
0.4895
|
0.4892
|
0.4890
|
1.22
|
0.4887
|
0.4884
|
0.4881
|
0.4879
|
0.4876
|
0.4873
|
0.4870
|
0.4868
|
0.4865
|
0.4862
|
1.23
|
0.4859
|
0.4856
|
0.4854
|
0.4851
|
0.4848
|
0.4845
|
0.4842
|
0.4839
|
0.4837
|
0.4834
|
1.24
|
0.4831
|
0.4828
|
0.4825
|
0.4822
|
0.4819
|
0.4817
|
0.4814
|
0.4811
|
0.4808
|
0.4805
|
1.25
|
0.4802
|
0.4799
|
0.4796
|
0.4794
|
0.4791
|
0.4788
|
0.4785
|
0.4782
|
0.4779
|
0.4776
|
1.26
|
0.4773
|
0.4770
|
0.4767
|
0.4764
|
0.4761
|
0.4758
|
0.4755
|
0.4752
|
0.4750
|
0.4747
|
1.27
|
0.4744
|
0.4741
|
0.4738
|
0.4735
|
0.4732
|
0.4729
|
0.4726
|
0.4723
|
0.4720
|
0.4717
|
1.28
|
0.4714
|
0.4711
|
0.4707
|
0.4704
|
0.4701
|
0.4698
|
0.4695
|
0.4692
|
0.4689
|
0.4686
|
1.29
|
0.4683
|
0.4680
|
0.4677
|
0.4674
|
0.4671
|
0.4668
|
0.4664
|
0.4661
|
0.4658
|
0.4655
|
1.30
|
0.4652
|
0.4649
|
0.4646
|
0.4643
|
0.4639
|
0.4636
|
0.4633
|
0.4630
|
0.4627
|
0.4624
|
1.31
|
0.4620
|
0.4617
|
0.4614
|
0.4611
|
0.4608
|
0.4604
|
0.4601
|
0.4598
|
0.4595
|
0.4592
|
1.32
|
0.4588
|
0.4585
|
0.4582
|
0.4579
|
0.4575
|
0.4572
|
0.4569
|
0.4566
|
0.4562
|
0.4559
|
1.33
|
0.4556
|
0.4552
|
0.4549
|
0.4546
|
0.4542
|
0.4539
|
0.4536
|
0.4532
|
0.4529
|
0.4526
|
1.34
|
0.4522
|
0.4519
|
0.4516
|
0.4512
|
0.4509
|
0.4506
|
0.4502
|
0.4499
|
0.4495
|
0.4492
|
1.35
|
0.4489
|
0.4485
|
0.4482
|
0.4478
|
0.4475
|
0.4471
|
0.4468
|
0.4464
|
0.4461
|
0.4458
|
1.36
|
0.4454
|
0.4451
|
0.4447
|
0.4444
|
0.4440
|
0.4437
|
0.4433
|
0.4430
|
0.4426
|
0.4422
|
1.37
|
0.4419
|
0.4415
|
0.4412
|
0.4408
|
0.4405
|
0.4401
|
0.4398
|
0.4394
|
0.4390
|
0.4387
|
1.38
|
1.4383
|
0.4379
|
0.4376
|
0.4372
|
0.4369
|
0.4365
|
0.4361
|
0.4358
|
0.4354
|
0.4350
|
1.39
|
1.4347
|
0.4343
|
0.4339
|
0.4335
|
1.4332
|
0.4328
|
0.4324
|
0.4321
|
0.4317
|
0.4313
|
1.40
|
0.4309
|
0.4306
|
0.4302
|
0.4298
|
0.4294
|
0.4290
|
0.4287
|
0.4283
|
0.4279
|
0.4275
|
1.41
|
0.4271
|
0.4267
|
0.4264
|
0.4260
|
0.4256
|
0.4252
|
0.4248
|
0.4244
|
0.4240
|
0.4236
|
1.42
|
0.4232
|
0.4228
|
0.4225
|
0.4221
|
0.4217
|
0.4213
|
0.4209
|
0.4205
|
0.4201
|
0.4197
|
1.43
|
0.4193
|
0.4189
|
0.4185
|
0.4181
|
0.4177
|
0.4173
|
0.4168
|
0.4164
|
0.4160
|
0.4156
|
1.44
|
0.4152
|
0.4148
|
0.4144
|
0.4140
|
0.4136
|
0.4131
|
0.4127
|
0.4123
|
0.4119
|
0.4115
|
1.45
|
0.4111
|
0.4106
|
0.4102
|
0.4098
|
0.4094
|
0.4090
|
0.4085
|
0.4081
|
0.4077
|
0.4072
|
1.46
|
0.4068
|
0.4064
|
0.4060
|
0.4055
|
0.4051
|
0.4047
|
0.4042
|
0.4038
|
0.4034
|
0.4029
|
1.47
|
0.4025
|
0.4020
|
0.4016
|
0.4012
|
0.4007
|
0.4003
|
0.3998
|
0.3994
|
0.3989
|
0.3985
|
1.48
|
0.3980
|
0.3976
|
0.3971
|
0.3967
|
0.3962
|
0.3958
|
0.3953
|
0.3949
|
0.3944
|
0.3939
|
1.49
|
0.3935
|
0.3930
|
0.3925
|
0.3921
|
0.3916
|
0.3912
|
0.3907
|
0.3902
|
0.3897
|
0.3893
|
1.50
|
0.3888
|
0.3883
|
0.3878
|
0.3874
|
0.3869
|
0.3864
|
0.3859
|
0.3855
|
0.3850
|
0.3845
|
1.51
|
0.3840
|
0.3835
|
0.3830
|
0.3825
|
0.3821
|
0.3816
|
0.3811
|
0.3806
|
0.3801
|
0.3796
|
1.52
|
0.3791
|
0.3786
|
0.3781
|
0.3776
|
0.3771
|
0.3766
|
0.3761
|
0.3756
|
0.3751
|
0.3745
|
1.53
|
0.3740
|
0.3735
|
0.3730
|
0.3725
|
0.3720
|
0.3715
|
0.3709
|
0.3704
|
0.3699
|
0.3694
|
1.54
|
0.3688
|
0.3683
|
0.3678
|
0.3673
|
0.3667
|
0.3662
|
0.3657
|
0.3651
|
0.3646
|
0.3640
|
1.55
|
1.3635
|
0.3630
|
0.3624
|
0.3619
|
0.3613
|
0.3608
|
0.3602
|
0.3597
|
0.3591
|
0.3586
|
1.56
|
0.3580
|
0.3574
|
0.3569
|
0.3563
|
0.3558
|
0.3552
|
0.3546
|
0.3540
|
0.3535
|
0.3529
|
1.57
|
0.3523
|
0.3518
|
0.3512
|
0.3506
|
0.3500
|
0.3494
|
0.3488
|
0.3483
|
0.3477
|
0.3471
|
1.58
|
0.3465
|
0.3459
|
0.3453
|
0.3447
|
0.3441
|
0.3435
|
0.3429
|
0.3423
|
0.3417
|
0.3411
|
1.59
|
0.3405
|
0.3399
|
0.3392
|
0.3386
|
0.3380
|
0.3374
|
0.3368
|
0.3361
|
0.3355
|
0.3349
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