Accession Number:

AD0748262

Title:

Tiltmeter Instrumentation for Deep Hole Operation

Descriptive Note:

Semi-Annual technical rept. 15 Dec 1971-14 Jun 1972

Corporate Author:

LITTLE (ARTHUR D) INC CAMBRIDGE MA

Personal Author(s):

Report Date:

1972-06-14

Pagination or Media Count:

27.0

Abstract:

Extensive field tests with the first deep-hole tiltmeter system DBT- 1 have been completed and a second system DBT-2 is being made ready for tests at the shallow test borehole at Bedford, Massachusetts. Problems encountered with cable generated noise and drift have been resolved by using a chain-type cable decoupler and a four-point contact holelock modification. Several improvements have been made on the DBT-2 control electronics and the downhole electronics of the DBT-1 was rebuilt to become identical with the improved downhole electronics of the DBT-2 system.

Subject Categories:

  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE