The Compod programmable control module, coupled with Smart-Trak mass flowmeters (MFMs) and controllers (photo), greatly simplifies basic flow control installations and permits networking of multiple instruments using open-source Modbus RTU protocol. The unit can be configured for a variety of process controls, including: gas mixing and blending; gas ratio control; simple batch processes; triggering alarms; starting or stopping gas flows automatically under user-defined conditions; and gas flow totalization. The Compod controls simple processes without the need for external PLCs or computers. It monitors the operation of instruments, providing potential problem alerts, and is available with a LCD display for local monitoring. — Sierra Instruments, Monterey, Calif.
This control module is coupled with digital mass flowmeters
| By Chemical Engineering