Smart Positioners YT-3300 / YT-3350      – Torque motor technology with communications Design features Auto calibration : – Simple menu structure with options to auto calibrate all parameters or zero and end points only. LCD display : – Alphanumeric digital display for process values and calibration. Partial Stroke Test (PST) : – Fully adjustable Partial Stroke Test. All functionality can be performed and selected locally, through push buttons, or remotely with communication protocol. Feedback signal : – Analogue and digital feedback signals with 4 to 20 mA, mechanical and proximity switch options (Limit switch options for YT-3300 and YT-3350 models). PID control : – Pre-calibrated and user configurable variables via front panel pushbutton menu. Auto / Manual switch : – Enables closed-loop automatic valve position control or manual positioning via the A/M switch. The manual mode is useful for troubleshooting, calibration, system testing or as a manual bypass. HART® communication : – Allows commands, position feedback and diagnostics to be sent digitally over the current loop. Front panel pushbuttons for configuration : – Four robust and positive acting pushbuttons for field configuration. Remote Mounting Option (YT-3301 model) : – Remote sensor via cable to enable the positioner to be mounted away from extreme temperature.