Abstract: A programmable system for testing relays and controlling systems is provided. In one embodiment the present disclosure provides a programmable device capable of, for example, testing relays. The device includes a signal generator for generating signals to test relays. The device includes a memory location, and a first program stored in the memory location. The first program supports relay testing. The device includes a versioned program to support relay testing, and a processor in communication with the signal generator and the memory location. The device also includes a routine that is operable by the processor to install a versioned program in the memory location replacing the first program.

Abstract: A programmable system for testing relays and controlling systems is provided. In one embodiment the present disclosure provides a programmable device capable of, for example, testing relays. The device includes a signal generator for generating signals to test relays. The device includes a memory location, and a first program stored in the memory location. The first program supports relay testing. The device includes a versioned program to support relay testing, and a processor in communication with the signal generator and the memory location. The device also includes a routine that is operable by the processor to install a versioned program in the memory location replacing the first program.

Abstract: Angular rotation of a member, such as the shaft of a tension arm assembly, is sensed by the combination of a circular type of magnet secured to the rotatable member and selectively polarized relative to its diameter to define a magnetic north-south pole pair, and a stationary Hall Effect transducing device secured in close and constant proximity to the ring magnet. A circuit coupled to the transducing device includes offset and amplification stages. In a preferred embodiment, the Hall Effect transducing device is located in the region of a magnetic null of the field generated by the magnetic poles, when the rotatable member is in a selected angular position. The constant gap between the transducing device and the circular magnet optimizes the generation of a linear output via the circuit, to accurately sense the member rotation.