Device for measuring a wide range of voltages and for determining continuity
First Claim
1. A device for testing electrical conductors, said conductors having placed thereon an alternating voltage with substantially repetitive phases, comprising, in combination:
- a phase control for monitoring said alternating voltage and responsively providing a phase enable signal for a predetermined segment of said phases of said alternating voltage;
a voltage sensor, interconnected to said phase control, for measuring said voltage of said electrical conductors and responsively producing a voltage signal;
a display for receiving said voltage signal and responsively displaying said voltage of said electrical conductors; and
a power supply receiving said phase enable signal from said phase control and powering said display.
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Accused Products
Abstract
An electrical test device for use by an electrician in testing circuits. The device includes a voltage sensor, display, and steady current source. The voltage sensor monitors the type of voltage (AC or DC) between the two conductors, and provides a signal to the display which responsively displays the type of voltage and the voltage level. The power supply has a steady current source that is in series with a tactile transducer, so that the test device may measure a broad range of voltages while only a limited amount of current flows through the voltage sensor. Consequently, lower cost components may be used in the voltage sensor. In another embodiment, the tester also includes a substantially independent continuity tester. The continuity tester includes its own power supply and alarm to indicate the continuity of a conductor and, thus, may operate even if the voltage sensor and display become inoperable. Further, the device may include a phase control for monitoring any alternating voltage sensed by the testing device. The phase control provides an enable signal for only a relatively small segment of the phase of an alternating voltage signal. Thus, the phase control enables the voltage sensor to sense voltage only for a relatively short period of every cycle of the voltage applied to the tester. Accordingly, a lower cost voltage sensor may be employed within the tester.
39 Citations
6 Claims
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1. A device for testing electrical conductors, said conductors having placed thereon an alternating voltage with substantially repetitive phases, comprising, in combination:
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a phase control for monitoring said alternating voltage and responsively providing a phase enable signal for a predetermined segment of said phases of said alternating voltage; a voltage sensor, interconnected to said phase control, for measuring said voltage of said electrical conductors and responsively producing a voltage signal; a display for receiving said voltage signal and responsively displaying said voltage of said electrical conductors; and a power supply receiving said phase enable signal from said phase control and powering said display. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification