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An improved electrical resistivity field system for shallow earth measurements.

Authors
Lepper-CM; Scott-JH
Source
Denver, CO: U.S. Department of the Interior, Bureau of Mines, RI 7942, 1974 Jan; :1-20
Link
NIOSHTIC No.
10000811
Abstract
The Bureau of Mines has developed an improved earth resistivity field system that employs a novel technique for obtaining null measurements. The instrument is designed to operate reliably in high-noise environments such as those found in the vicinity of operating mines. The system consists of a low-frequency transmitter, a sensitive receiver, and an external battery pack, each in its own case to provide protection from the elements. The receiver and transmitter units have self-contained rechargeable batteries to supply power to the circuitry and separate built-in battery charges that operate on standard 115 vac power. The system is portable and simple to operate. Measurement accuracy, reliability, and dynamic range are superior to most commercially available equipment even though less time and effort is required to make null readings. Unlike some commercial systems, long integration times are not required to enhance signal-to-noise ratio in areas of high background noise.
Keywords
Mining-industry; Underground-mining; Analytical-processes; Analytical-instruments; Geology
Publication Date
19740101
Document Type
IH; Report of Investigations
Fiscal Year
1974
NTIS Accession No.
PB-234694
NTIS Price
A03
Identifying No.
RI-7942
NIOSH Division
DRC
Source Name
Denver, CO: U.S. Department of the Interior, Bureau of Mines, RI 7942
State
CO
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