Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1998-04-16
2000-05-16
Wu, Daniel J.
Communications: electrical
Condition responsive indicating system
Specific condition
340661, 340662, 340664, 324508, 324509, G08B 2100
Patent
active
060643137
ABSTRACT:
A tester for checking the impedance of an electrical circuit by measuring the percentage voltage drop of the circuit resulting from the application of a user-supplied load. The tester includes connection means suitable for connection into the electrical circuit to be tested. The tester stores a sample of the voltage present at the connection. As the user applies a load to the circuit, the tester compares the sampled circuit voltage to the loaded circuit voltage. If the voltage difference after a set delay time is greater than a set percentage, an indicator on the tester alerts the user to this fact. A large voltage drop in a circuit can be an indication of hazardous wiring conditions, possibly due to corroded or loose connections, improper wire size, or other faulty components in the circuit.
REFERENCES:
patent: 4857826 (1989-08-01), Graham
patent: 4862142 (1989-08-01), Knight
patent: 4879625 (1989-11-01), Potenzone
patent: 5525908 (1996-06-01), Brownell
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