Đồng hồ đo lưu lượng nhiệt EL-FLOW SELECT F-111B Bronkhorst Vietnam, đại lý Bronkhorst Vietnam
EL-FLOW SELECT F-111B
Digital Thermal Mass Flow Meter for Gases
- High accuracy, excellent repeatability
- Optional Multi Fluid / Multi Range functionality
- Virtually pressure and temperature independent
- Compact design
Gas Mass Flow Meters for low flow rates
Bronkhorst® model F-111B Mass Flow Meters (MFMs) are suited for precise measurement of flow ranges between 0,16…8 mln/min and 0,16…25 ln/min at operating pressures between vacuum and 100 bar. The MFM consists of a thermal mass flow sensor and a microprocessor based pc-board with signal and fieldbus conversion and a PID controller for optional mass flow control by means of a separately mounted control valve.
EL-FLOW® Select series are equipped with a digital pc-board, offering high accuracy, excellent temperature stability and fast response. The main digital pc-board contains all of the general functions needed for measurement and control. In addition to the standard RS232 output the instruments also offer analog I/O. As an option, an on-board interface can be mounted to provide DeviceNet™, PROFIBUS DP, Modbus, EtherCAT®, PROFINET or FLOW-BUS protocols. The EL-FLOW® Select design features optional Multi Gas / Multi Range functionality, providing (OEM-) customers with optimal flexibility and process efficiency.
Technical specifications
| Measurement / control system |
Flow range, based on N2
(intermediate ranges available) |
min. 0,16…8 mln/min
max. 0,16…25 ln/min |
Accuracy (incl. linearity)
(based on actual calibration) |
±0,5% Rd plus ±0,1% FS |
| Turndown |
1:50 (in digital mode up to 1:187,5) |
| Multiple fluid capability |
storage of max. 8 calibration curves;
optional Multi Gas / Multi Range functionality up to 10 bar abs |
| Repeatability |
< 0,2% Rd |
| Response time |
typical 0,5 sec |
| Operating temperature |
-10…+70°C |
| Temperature sensitivity |
zero: < 0,05% FS/°C; span: < 0,05% Rd/°C |
| Pressure sensitivity |
0,1% Rd/bar typical N2; 0,01% Rd/bar typical H2 |
| Leak integrity, outboard |
tested < 2 x 10-9 mbar l/s He |
| Attitude sensitivity |
max. error at 90° off horizontal 0,2% at 1 bar, typical N2 |
| Warm-up time |
30 min. for optimum accuracy
2 min for accuracy ± 2% FS |
| Mechanical parts |
| Material (wetted parts) |
stainless steel 316L or comparable |
| Pressure rating |
100 bar abs |
| Process connections |
compression type or face seal couplings |
| Seals |
standard: Viton®; options: EPDM, Kalrez® (FFKM) |
| Weight |
0,5 kg |
| Ingress protection (housing) |
IP40 |
| Electrical properties |
| Power supply |
+15…24 Vdc |
Max. power consumption
meter |
Supply
15 V
24 V |
at voltage I/O
95 mA
65 mA |
at current I/O
125 mA
85 mA |
Max. power consumption
controller |
Supply
15 V
24 V |
at voltage I/O
290 mA
200 mA |
at current I/O
320 mA
215 mA |
| PROFIBUS DP |
add 53 mA (15 V supply) or 30 mA (24 V supply) |
| PROFINET |
add 77 mA (15 V supply) or 48 mA (24 V supply) |
| EtherCAT® |
add 66 mA (15 V supply) or 41 mA (24 V supply) |
| DeviceNet™ |
add 48 mA (24 V supply) |
| Analog output/command |
0...5 (10) Vdc or 0 (4)…20 mA (sourcing output) |
| Digital communication |
standard: RS232;
options: PROFIBUS DP, DeviceNet™, PROFINET, EtherCAT®, Modbus RTU or ASCII, FLOW-BUS |
| Electrical connection |
| Analog/RS232 |
9-pin D-connector (male); |
| PROFIBUS DP |
bus: 9-pin D-connector (female);
power: 9-pin D-connector (male); |
| Devicenet™ |
5-pin M12-connector (male); |
| EtherCAT®/ PROFINET |
2 x RJ45 modular jack (in/out) |
| FLOW-BUS/Modbus-RTU/ASCII |
RJ45 modular jack |
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