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.
Descriptors:
Subject Categories:
- Test Facilities, Equipment and Methods