Abstract: A programmable controller which generates a digital normalized diameter signal and a digital normalized reel strip velocity signal is adapted for the generation of inertia compensation either with a constant torque, a constant horsepower, or a maximum torque reel system.

Abstract: In a multiplexed and microprocessor-based data acquisition system involving temperature measurement with temperature resistor thermometer devices (RTD), automatic signal substitution for calibration is effected without physically interrupting the measurement signal path by taking three measurements between the three wires at the input and using with the microprocessor a cancellation algorithm.

Abstract: An RTD bridge is coupled with a microprocessor-based data acquisition system for linear reading of temperature and for accuracy at the level of the precision data acquisition system. A reference divider is paralleled with the RTD bridge between a voltage reference source and ground, and linearization is effected in accordance with a function which is a geometric progression of the measured non-linear count. Calibration is effected in one embodiment with a precision divider, or with the bridge itself by making readings at the lowest and at the highest temperature intended with the bridge, according to another embodiment of the invention.