The system consists of two components: the Series 4040 instrument and the user's personal computer. The user interface is a Microsoft Windows application that communicates with the Environics system via an RS232 serial interface.
The Series 4040 consists of a single chassis supporting up to four mass flow controllers. The mass flow controllers are factory calibrated using a primary flow standard traceable to the United State's National Institute of Standards and Technology (NIST). Each flow controller utilizes an 11 point calibration table with linear interpolation, to insure an accuracy of ± 1% of reading and reduce flow controller nonlinearity.
Environics, Inc., 69 Industrial Park Road East, Tolland, CT 06084-2805. Tel: 860-872-1111; Fax: 860-870-9333.