G - Physics
01
R
G01R 31/327 (2006.01)
Patent
CA 2147888
A computerized relay tester (1) is provided which comprises a bar code reader (16), a test circuit (15) for determining an actual value of an operational characteristic of the relay (1), and a memory for storing reference values for the operational charac- teristic for a plurality of relays. The test circuit is operative to automatically measure the actual voltage or current at which "pick- up" or "drop away" occurs in the relay under test, by sensing an inductive voltage "spike" caused by of the relay arma- ture. Based on signals from the bar code reader, a referenoe value for the particular operational characteristic under test are retrieved from memory. The actual value is then compared with the reference value to determine whether the relay is functioning properly, and the relay tester outputs an indication of the operational state or condition of the relay.
Shurmantine William
Thee Michael
General Railway Signal Corporation
Gowling Lafleur Henderson Llp
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