Onboard digital locomotive multimeter

Details Onboard digital locomotive multimeter Onboard digital locomotive multimeter

1994-11-14

1996-09-17

Wieder, Kenneth A.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural ranges, scales or registration rates

324142, 324114, G01R 1900, G01R 100, G01R 2100

Patent

active

055571980

ABSTRACT:
A digital, DC voltage meter device utilized for metering electric power on a locomotive system. This invention will eliminate the need to use a hand held meter to perform these functions. The meter is permanently built into the Voltage test panel, replacing test receptacles with a large 7/10' LED display that can be read day or night. It is designed to operate in temperatures from -32 degrees Fahrenheit to 158 degrees Fahrenheit. A three position spring loaded switch returning to the off position is used to operate the meter. The present invention is a custom DC voltage meter that is capable of measuring two voltage ranges on a locomotive system; 0-1500 Volts ("V") for main generator voltage can be measured when the switch is in the top position; and 0-75 millivolts ("mV") for load test shunt millivoltage can be measured when the switch is in the bottom position. The meter is also capable of displaying the Dynamic Braking Voltage when the locomotive's dynamic brake is engaged.

REFERENCES:
patent: 3614611 (1971-10-01), Benjamin
patent: 4758962 (1988-07-01), Fernandes

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