Priva applies its controls expertise to close control

Close control of environmental conditions for a clean room making cleaning fluids for spectacle glass and contact lenses is provided by a Priva building-control system. It controls temperature and relative humidity for BioVision in Belgium. Priva partner Fernlea Systems installed three Compri HX4 intelligent controllers to manage three air-handling units supplying conditioned air to the production area. They are linked to a central display in a control panel in the plant room so that all the AHUs can be interrogated and adjusted from a single point. Temperature is controlled to within ±1 K and relative humidity to within ±5%. Critical alarms and change-of-state messages are automatically reported to a dedicated station, enabling BioVision staff to take decisive action. The modular construction of the Compri HX range enables the controllers to be customised at the engineering stage. The HX4 is built around a 32-bit processor can support up to 92 universal I/O modules.
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