Yokogawa Electric Corporation has enhanced its YS1000 series single-loop controllers with a new TFT (thin-film transistor) LCD featuring improved display characteristics and a design that facilitates easy maintenance.
Single-loop controllers are used in a wide variety of industrial facilities such as power plants, oil refineries, petrochemical plants, chemical plants, and iron and steel plants. These controllers receive temperature, flow rate, pressure, and other types of measurement readings from sensors and send corresponding instructions to control elements such as valves in order to maintain these values within a desired range. Each control loop has its own controller. Single-loop controllers are widely used in industry today to control small plant facilities and serve as backups to distributed control systems.
For reasons such as the decline in the number of skilled engineers in the workforce, many users have a need for controllers that are easy to use and maintain. To meet such needs, Yokogawa has improved its YS1000 series controllers. Formerly, this product used a super twisted nematic (STN) LCD screen. This has been changed to a TFT LCD screen that has a 1.5 times wider viewing angle offering an improved display contrast and brightness. It can be replaced while the controller is online without interrupting the output of signals to control elements.
Applications include operation, monitoring, and control of production facilities in a wide variety of industries including power, oil refining, petrochemicals, chemicals, iron and steel, pulp and paper, food, pharmaceuticals, and water and sewage.