AC Resistance measuring instrument
- Richland, WA
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.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- DOE Contract Number:
- EY-76-C-06-1830
- Assignee:
- Hof, Peter J. (Richland, WA)
- Patent Number(s):
- US 4408282
- OSTI ID:
- 864722
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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
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