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Title: AC Resistance measuring instrument

Abstract

An auto-ranging AC resistance measuring instrument for remote measurement of the resistance of an electrical device or circuit connected to the instrument includes a signal generator which generates an AC excitation signal for application to a load, including the device and the transmission line, a monitoring circuit which provides a digitally encoded signal representing the voltage across the load, and a microprocessor which operates under program control to provide an auto-ranging function by which range resistance is connected in circuit with the load to limit the load voltage to an acceptable range for the instrument, and an auto-compensating function by which compensating capacitance is connected in shunt with the range resistance to compensate for the effects of line capacitance. After the auto-ranging and auto-compensation functions are complete, the microprocessor calculates the resistance of the load from the selected range resistance, the excitation signal, and the load voltage signal, and displays of the measured resistance on a digital display of the instrument.

Inventors:
 [1]
  1. (Richland, WA)
Issue Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA
OSTI Identifier:
864722
Patent Number(s):
4408282
Assignee:
Hof, Peter J. (Richland, WA) PNNL
DOE Contract Number:  
EY-76-C-06-1830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
resistance; measuring; instrument; auto-ranging; remote; measurement; electrical; device; circuit; connected; signal; generator; generates; excitation; application; load; including; transmission; line; monitoring; provides; digitally; encoded; representing; voltage; microprocessor; operates; control; provide; function; range; limit; acceptable; auto-compensating; compensating; capacitance; shunt; compensate; effects; auto-compensation; functions; complete; calculates; selected; displays; measured; digital; display; selected range; signal representing; circuit connected; measuring instrument; voltage signal; transmission line; signal generator; excitation signal; monitoring circuit; resistance measuring; digital display; electrical device; coded signal; remote measurement; compensating capacitance; digitally encoded; /702/324/

Citation Formats

Hof, Peter J. AC Resistance measuring instrument. United States: N. p., 1983. Web.
Hof, Peter J. AC Resistance measuring instrument. United States.
Hof, Peter J. Sat . "AC Resistance measuring instrument". United States. https://www.osti.gov/servlets/purl/864722.
@article{osti_864722,
title = {AC Resistance measuring instrument},
author = {Hof, Peter J.},
abstractNote = {An auto-ranging AC resistance measuring instrument for remote measurement of the resistance of an electrical device or circuit connected to the instrument includes a signal generator which generates an AC excitation signal for application to a load, including the device and the transmission line, a monitoring circuit which provides a digitally encoded signal representing the voltage across the load, and a microprocessor which operates under program control to provide an auto-ranging function by which range resistance is connected in circuit with the load to limit the load voltage to an acceptable range for the instrument, and an auto-compensating function by which compensating capacitance is connected in shunt with the range resistance to compensate for the effects of line capacitance. After the auto-ranging and auto-compensation functions are complete, the microprocessor calculates the resistance of the load from the selected range resistance, the excitation signal, and the load voltage signal, and displays of the measured resistance on a digital display of the instrument.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {1}
}

Patent:

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