The EL-FLOW Prestige is the latest generation thermal mass flow meters and controllers for gases. This flow meter from Bronkhorst represents a truly ground-breaking shift in versatility and user-friendliness. Its principal customer benefits are based upon further advance in flow-signal processing. And its highly stable flow control regime is virtually impervious to process fluctuations.
EL-FLOW Prestige is equipped with an on-board gas conversion model. It includes a gas database for 100 unique, customer selectable gases. Flow ranges, based on N2:
The control performance of EL-FLOW Prestige Mass Flow Controllers is factory adjusted to swiftly respond to setpoint changes, without overshoot. Moreover, the controllers are highly resistant to mechanical shocks and pressure fluctuations, which may be caused by other devices consuming gas from the same source.
As an option the MFCs can be tuned for extra fast response (Settling times t98% down to 500msec) or extra smooth control, depending on the requirements of the user’s process. The dynamic behavior can also be tuned on site easily, by adjusting the controller speed settings via FlowTun, or by using our software tool FlowPlo. This free tool can also be used for device diagnostics or alarm and counter settings.
Numerous input/output options can be offered through the programmable sub-D 9-pin connector. In addition to the various analog signal options and the standard RS485 communication, digital frequency/pulse output, alarm output/reset, valve purge/close and analog valve output. Furthermore Bronkhorst offers various integrated fieldbus options: DeviceNet, PROFIBUS DP, PROFINET, Modbus RTU/ASCII, EtherCAT, and FLOW-BUS.
The latter is an RS485 based fieldbus, specifically designed by Bronkhorst for their mass flow metering and control solutions. For the convenience of customers working with LabVIEW (graphical software by National Instruments) Bronkhorst provides a certified plug & play instrument driver for instruments with FLOW-BUS interface.
El-FLOW Prestige offers high flexibility due to the Multi Gas/Multi Range (MG/MR) functionality. This functionality, now extended to 100 gases, is easily accessible via the FlowTune software or PLC; there is no need to disconnect the instrument from your system.
Users of EL-FLOW Prestige instruments can re-scale their instruments on site, saving time and money for dismounting and re-calibration. Furthermore, original equipment manufacturers (OEMs) are able to drastically reduce the variety of spare instruments kept on stock and thus reduce the cost of ownership.
Besides the obvious I/O-options for measured and setpoint values via analog signals, RS232 or fieldbus communication, EL-FLOW prestige features a programmable pin (pin 5) at the 9-pin sub-D connector for customized I/O configurations. This functionality can be used for advanced operations such as digital frequency/pulse output, alarm output/reset, processing an external setpoint signal, valve purge/close and analog valve output. Some options are specified in the model number identification, however, numerous other settings can be programmed on request.
External factors can have influence on the measurement accuracy and control stability of mass flow controllers (MFCs). EL-FLOW Prestige instruments feature accurate temperature compensation, correcting the flow measurement for temperature changes. Compensation of pressure changes can be achieved by using the new ‘Pressure Insensitive’ option instead of using an external pressure transmitter.
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