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Time Domain Reflectometry Microcomputer.
Dworak-RA; Jordan-AG; Thorne-JS
NTIS: PB/267-785 Available for Reference At Bureau Libraries :113 pages
This report describes the work done on the development of the time domain reflectometry microcomputer (TDRM). Modifications to the FMC- Model 302a Cable Fault Locator is described in Appendix D. The TDRM unit uses an 8080 microcomputer to accurately locate major faults in low capacitance cables to within +- 1 foot when properly calibrated. Major faults in high capacitance cables are usually located within +- 5 feet. The upper limits of fault detection are <1 kilohm shunt fault and >7 ohm series fault. In practice, fault detection limits are reduced to <300 ohms shunt fault and >30 ohms series fault because of discontinuities caused by cable repair.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB/267-785 Available for Reference At Bureau Libraries
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division