Abstract: Methods and apparatus for pressure-based direct measurement of a final control element variable are disclosed. An example method includes receiving a signal from a first sensor mounted on a shaft of a valve, converting the signal to a pressure, routing the pressure to a second sensor of a controller operatively coupled to a pneumatic actuator, the pneumatic actuator operatively coupled to the shaft, and determining, by the controller, a first torque on the shaft based on the pressure.

Abstract: Described techniques provide direct measurement of shaft torque in control valve assemblies. The measured torque can be utilized to analyze the performance or health of the control valve. The described techniques utilize a direct measurement of shaft torque, providing a more accurate and precise measurement than an indirect or proxy measurement.

Abstract: Methods, apparatus, systems and articles of manufacture are disclosed for power selection, including evaluating a first power source to determine if the first power source is available, evaluating a second power source to determine if the second power source is available, upon determining that a power source of the first and second power sources is available, selecting the power source, providing power from the selected power source to a sensor, and performing the diagnostic task based on an input from the sensor.

Abstract: Discrete logic safety systems for smart process control devices are disclosed. A discrete logic safety system includes a heartbeat monitor to be operatively coupled to a processor of the process control device to monitor a first condition of the processor, a sensor monitor to be operatively coupled to a sensor of the process control device to monitor a second condition of the sensor, and first discrete logic operatively couple to the heartbeat monitor and the sensor monitor to generate a failure indication associated with the process control device based on the first condition or the second condition.

Abstract: Methods and apparatus for pressure-based direct measurement of a final control element variable are disclosed. An example method includes receiving a signal from a first sensor mounted on a shaft of a valve, converting the signal to a pressure, routing the pressure to a second sensor of a controller operatively coupled to a pneumatic actuator, the pneumatic actuator operatively coupled to the shaft, and determining, by the controller, a first torque on the shaft based on the pressure.

Abstract: Discrete logic safety systems for smart process control devices are disclosed. A discrete logic safety system includes a heartbeat monitor to be operatively coupled to a processor of the process control device to monitor a first condition of the processor, a sensor monitor to be operatively coupled to a sensor of the process control device to monitor a second condition of the sensor, and first discrete logic operatively couple to the heartbeat monitor and the sensor monitor to generate a failure indication associated with the process control device based on the first condition or the second condition.

Abstract: An example terminal block includes an annular arrangement of terminal pairs. Each of the terminal pairs has a first height and is adjacent another terminal pair having a second height different from the first height.

Abstract: An example terminal block includes an annular arrangement of terminal pairs. Each of the terminal pairs has a first height and is adjacent another terminal pair having a second height different from the first height.