Voltage Indicator with Continuity Check

摘要

A system for testing electrical continuity of a device to a source wherein there is at least one conductor connecting the device to the source can include a reference capacitive load, an oscillator, and a microprocessor. The oscillator is selectively connected to the reference capacitive load and each conductor connecting the device to the source such that the frequency output of the oscillator is a function of the selected capacitive load of the oscillator. Each conductor connecting the device to the source is connected to the oscillator such that when each one is selectively connected, the output of the oscillator is a function of that conductor's parasitic self-capacitance. The microprocessor can then compare the frequency of the signal generated when each conductor is connected to the oscillator with the frequency of the signal generated when the reference capacitive load is connected.

主权项

1. A system for testing the electrical continuity of a device to a source through a cable containing at least one conductor connecting the device to the source comprising:
a reference capacitive load; an oscillator selectively connected to the reference capacitive load and to the at least one conductor, the oscillator configured such that a frequency output of the oscillator is a function of a selected capacitive load connected to the oscillator, the at least one conductor connected to the oscillator such that a frequency output of the oscillator when the at least one conductor is connected is a function of a parasitic self-capacitance of the at least one conductor; and a microprocessor connected to the oscillator, the microcontroller configured to compare a frequency output of a signal generated when the at least one conductor is selectively connected with a frequency output of a signal generated when the reference capacitive load is selectively connected.