Bronkhorst meter/controller

Product description:

Bronkhorst High-Tech B.V. manufactures the largest variety of thermal Mass Flow Meters and Controllers for gases and liquids. The Mass Flow Meters of the EL-FLOW® Series are compact, modular instruments with laboratory style electronics housing. They can be combined with control valves, either integrated or separate, in order to measure and control gas flows in ranges starting from 0,063 mln/min up to 251250 ln/min air-equivalent.

LOW-delta-P-FLOW AND EL-PRESS SERIES
For applications with low pressure drop Bronkhorst High-Tech can offer the LOW-delta P-FLOW series. These instruments can also be equipped with the new multi-bus digital pc-board. The EL-PRESS series Electronic Pressure Transducers and Controllers are available with the new pc-boards too.

PRESSURE INSTRUMENTS
The Bronkhorst High-Tech B.V. pressure meter measures pressures from 100 mbar up to 400 bar depending on body rating, either absolute pressure or gauge pressure and in the range 0 to 15 bar differential pressure too. The pressure controller controls pressure with a very high accuracy and repeatability. The controller is available in forward control (P-600 series) and backward control (P-700 series).
The flow going through the pressure controller depends on up and downstream pressures, the orifice diameter of the valve and kind of fluid. Industrial instruments have IP-65 protection class and therefore other housings. Profibus will be connected using M12 connectors. Bronkhorst High-Tech Cori-Flow® instruments are based on Coriolis measuring principle and are offered in a range of 200 g/h up to 600 kg/h for both gasses and liquids and for meters as well as controllers. They also offer IP65 protection class and have M12 connectors for connection to Profibus-DP.

The MFCs that speak your language?
Bronkhorst High-Tech B.V. developed their latest digital instruments according to the multi-bus principle. The basic pc-board on the instruments contains all of the general functions needed for measurement and control. It has analog I/O-signals and also a RS232 connection as standard feature. In addition to this there is the possibility of integrating an interface board with PROFIBUS DP protocol.

FIELDS OF APPLICATION
· Gas flow control in semiconductor machinery
· Analysis and environmental studies
· Gas flow monitoring in food, chemical and petrochemical plants
· Flow measurement for accounting purposes in gas supply systems
· Leak measurement
· Gas flow control in chemical plants

Bronkhorst High-Tech Mass Flow Meters/ Controllers can be directly used as PROFIBUS DP slaves. By using the SPC3-Asic of Siemens Baudrates of up to 12 MBaud can be achieved.

PROFIBUS DP CHARACTERISTICS
· baudrates from 9,6 kBaud up to 12 Mbaud
· +15 Vdc or +24 Vdc supply voltage
· modular slave with max. 50 modules
· flexibility of data-configuration by selecting suitable modules
· parameter-data setting by means of a configuration tool is supported
· max. 244 Bytes input and max. 244 Bytes output
· freeze and synchronisation is supported
· connection to PROFIBUS DP by means of Sub-D-9 connector
· station-address and baudrate-setting by PROFIBUS DP, micro-switch or using configuration tool via RS232
· galvanic isolation up to 500 V (for data transfer only)
· maximum bus length 1200 metres at 9,6 kBaud, 100 metres at 12 Mbaud
· Up to 124 instruments to be connected to one bus

GENERAL SPECIFICATIONS EL-FLOW DIGITAL SERIES
based on a 16-bit micro controller with FLASH memory
analog input/output: 0...5 Vdc, 0...10 Vdc,0...20 mA, 4...20 mA (sourcing)
Valve output can be monitored
2 LEDs for status indication
1 multifunctional switch for digital functions
configuration software for operation and service is available (through RS232)
accuracy +/- 0,5% of reading plus +/- 0,1 % full scale (based on actual calibration)
up to 8 calibration curves

GENERAL EL-FLOW FEATURES
· no moving parts
· electropolished wetted parts
· fast control
· flow computer not required
· temperature or pressure compensation not required
· low pressure drop
· pressure ratings up to 400 bar(higher on request)

DIGITAL FEATURES
· PROFIBUS DP slave
· RS232 Interface
· Other interface options on request
· analog output standard available
· high accuracy
· alarm and counter functions
· single rail power supply: +15 or +24 Vdc

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