Description
This mass flow controller (MFC) is suited for regulating the mass flow of gases over a big flow range. The thermal MEMS sensor is located directly in the gas stream and therefore reaches very fast response times. A direct-acting proportional valve guarantees a high sensitivity. The integrated PI controller ensures outstanding control characteristics of the MFC. Type 8711 can optionally be calibrated for two different gases; the user can switch between these two gases. As electrical interfaces both, analog standard signals and fieldbuses are available. The mass flow controller type 8711 fits for various applications, like e.g. burner controls, heat treatment, material coatings, bio reactors, fuel cell technology or test benches.
Mass flow controller features
- Nominal range: 10 mlN/min to 80 lN/min (N2)
- Operating gas Neutral, non-contaminated gases
- Calibration gas Operating gas or air with conversion factor
- Max. operating pressure (Inlet pressure) 10 bar (145 psi) depending on the orifice of the valve
- Gas temperature – 10 to + 70 °C (- 10 to + 60 °C with oxygen)
- Ambient temperature – 10 to + 50 °C
- Accuracy ± 0.8 % o.R. ± 0.3 % F.S. (after 1 min. warm up time)
- Repeatability ± 0.1 % F.S.
- Settling time (t95 %) < 300 ms
- Materials Body: Aluminium or stainless steel, Housing: PC (Polycarbonate) or metal, Seals: FKM, EPDM
- Port connection NPT ¼, G ¼, screw-in
- Regulating unit (Proportional Valve): Normally closed, Valve orifice = 0.05 to 4.0 mm
- Electr. connection: Plug D-Sub 15 pin, optional PROFIBUS-DP: Socket M12 5 pin or with CANopen: Socket M12 5 pin
- Power supply 24 V DC
- Power consumption Max. 3.5 to 14 W (depending on proportional valve used)
- Input signal: 0 to 5 V, 0 to 10 V, 0 to 20 mA or 4 to 20 mA > 20 kOhm (voltage), < 300 Ohm (current)
- Output signal: 0 to 5 V, 0 to 10 V, 0 to 20 mA or 4 to 20 mA, Max. current (voltage): 10 mA, Max load (current) 600 Ohm
- Digital communication via adapter possible: RS232, Modbus RTU (via RS adapter) RS485, RS422 or USB
