Burkert-Type 8711 - Mass Flow Controller for Gases (MFC)

Burkert – Type 8711 Mass Flow Controller (MFC) for Gases

จุดเด่นของ Type 8711

Nominal flow ranges from 0.010 l/min to 80 l/min
High accuracy and repeatability
Very fast settling times
Optional: Fieldbus interface

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Mass Flow Controller for Gases (MFC)

The mass flow controller (MFC) Type 8711 is suited for regulating the mass f low 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 from Bürkert 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.

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type 8711

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General Technical Data

Product properties
Material
Basic block	Aluminium or stainless steel
Body	PC (Polycarbonate) or metal
Seal	FKM, EPDM
Dimensions	Detailed information can be found in chapter “3. Dimensions” on page 5.
Total weight	approx. 500 g (Aluminium)
LED display	Indication for power, limit (with analogue signals) / communication (with fieldbus) and error
Performance data
Nominal flow range1.) (QNom)	10 mlN/min2.)…80 lN/min (N2) Detailed information can be found in chapter “5.2. Flow characteristic” on page 9.
Measuring range	1:50, higher measuring range on request
Max. operating pressure	10 bar (145 psi) (depending on control valve used)
Measuring accuracy	± 0.8 % o. R. ± 0.3 % F. S. (after 1 min. warm up time)
Repeatability	± 0.1 % o. R.
Response time (t95 %)	< 300 ms
Electrical data
Operating voltage	24 V DC
Power consumption	Max. 3.5…14 W (depending on the proportional valve used)
Voltage tolerance	± 10 %
Residual ripple	< 2 %
Electrical connection	Plug D-Sub, 15 pin with PROFIBUS DP: M12-Socket, 5 pin with CANopen: M12-Plug, 5 pin
Medium data
Operating medium	Neutral, or aggressive gases
Calibration medium	Operating gas or air with conversion factor
Medium temperature	– 10 °C…+ 70 °C (- 10 °C…+ 60 °C for oxygen)
Process/Port connection & communication
Process connection	NPT ¼, G ¼, screw-in fitting or sub-base, others on request
Fieldbus option	PROFIBUS-DP, CANopen
Digital outputs	1 Relay-output for setpoint not reached Load capacity: 25 V, 1 A, 25 VA
Digital inputs	Three 1. Start Autotune 2. Not assigned
Digital (communication) interface	RS232, Modbus RTU (via RS-Adapter), RS485, RS422 or USB (see “6.4. Ordering chart accessories” on page 11)
Analogue interfaces	4…20 mA, 0…20 mA, 0…10 V or 0…5 V Input impedance > 20 kΩ (Voltage) resp. < 300 Ω (Current) Max. load: 10 mA (Voltage output); max. load: 600 Ω (Current output)
Environment and installation
Installation position	Horizontal or vertical
Degree of protection	IP65
Accessories
Software-Tool	Mass Flow Communicator

*For selecting thecorrect product please refer to the technical data, images and notes for proper use according to the data sheet, or contact Flu-Tech directly.