Patent ID: 8565966

Claim:
A portable device for determining a status of a tanker truck safety system, the device comprising: a microprocessor configured to run a program to determine the status of a tanker truck safety system; a plurality of spring-loaded pins configured to couple with corresponding contact pads on the truck safety system, the plurality of pins coupled to a plurality of inputs of the microprocessor; a first intrinsically safe power supply controlled by the microprocessor and coupled to a first subset of the plurality of spring-loaded pins and configured to provide a first intrinsically safe voltage to each pin individually under control of the microprocessor; and a second intrinsically safe power supply controlled by the microprocessor and coupled to a spring-loaded pin not in the first subset of pins and configured to provide a second intrinsically safe voltage to the one pin under control of the microprocessor, wherein the first and second intrinsically safe voltages are on separate rails.