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Earth, Planets and Space

Table 2 Accuracy specifications for resistance measurement by the electrometer (Keithley 6514)

From: A procedure for stable electrical measurements on a rock sample against high contact resistance as a prerequisite for electrical tomography

Range (Ω)

Resolution (Ω)

Direct injection current (A)

2 × 106

1 × 101

0.9 × 10−6

2 × 107

1 × 102

0.9 × 10−6

2 × 108

1 × 103

0.9 × 10−6

2 × 109

1 × 104

0.9 × 10−9

2 × 1010

1 × 105

0.9 × 10−9

2 × 1011

1 × 106

0.9 × 10−9

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