Tyco Valves & Controls have introduced a new analogue positioner that enables plant operators to make use of valve status information in process control algorithms. The SmartCal intelligent positioner is hazardous-area certified and utilises non-contacting means to feed back accurate information about the exact positional status of the valve, together with data on the input signal and actuator pressure. Such historical information builds a comprehensive picture of the valve’s performance and can form the basis of many algorithms such as, those used in predictive maintenance programmes. As the unit is AMS aware, various data can be collected in order to ensure the optimum performance is achieved from the Control Valve Package. SmartCal positioners may be calibrated on site, either by a direct touchpad system, or via HART commands from a PC based diagnostic system, utilising the HART protocol. The Auto Calibration function includes zero/span and PID features together with independent speed control and position limits to optimise the positioner to the process.
