F126-EG - Flow computer

F126-EG - Flow computer
with temperature and pressure compensation for corrected gas volume

The F126-EG flow computer has been developed to calculate corrected gas volume at normal conditions. The corrected volumetric flow is calculated by measuring the uncorrected volumetric flow, actual line temperature and pressure which are processed with the equations stored in the flow computer. A compressibility factor can be set to approach a real gas behavior. The reference conditions can be defined as desired (e.g. 15°C or 60°F and 1.013 bar).
The display shows the compensated flow rate, total, accumulated total and the actual line temperature and pressure. On-screen engineering units like Nm³ are easily configured from a comprehensive selection.
A wide range of options further enhance this models capabilities, including Intrinsic Safety for hazardous area applications and full Modbus communication.

Features
• Calculates compensated flow rate, total and accumulated total.
• Displays actual line pressure and temperature.
• Analog output signal reflecting the corrected flow rate.
• Displays total and flow rate simultaneously.
• Flow rate: seven 8mm (0.31") digits.
• Total - resettable: seven 17mm (0.67") digits.
• Accumulated total - not resettable: eleven 8mm (0.31") digits.
• Temperature: six 17mm (0.67") digits.
• Pressure: six 17mm (0.67") digits.
• Engineering units for flow rate, total, temperature and pressure on the display.
• Green LED backlight.
• Auto backup of settings and running totals in EEPROM memory.
• Operational temperature: -30°C to +80°C (-22°F to 178°F).
• Very compact design for panel mount, wall mount or field mount applications.
• Rugged aluminum or GRP field mount enclosure IP67 / NEMA4X.

Applications
Applications where net flow calculation of gasses at normal conditions is desired without the influence of thermal product expansion and pressure.

Flowmeter Inputs
• Pulse type inputs:
Reed-switch, NAMUR, NPN/PNP pulse, Sine wave (coil), active pulse signal.
• (0)4 – 20mA.
• 0 – 10V DC.

Temperature Inputs
• PT100 - 2 or 3 wire PRTD sensor.
• (0)4 – 20mA.
• 0 – 10V DC.

Pressure Inputs
• (0)4 – 20mA.
• 0 – 10V DC.

Pulse Outputs
• None.

Alarm Outputs
• None.

Analog Outputs
• Function: Re-transmitting the compensated flow rate - the output can be scaled to any range (e.g. 200 L/min to 1200 L/min).
• Type: One passive isolated, floating or loop powered 4 – 20mA output or one active (0)4 – 20mA or 0 – 10V DC output.

Power Supply
• Battery.
• 4 – 20mA Loop-powered.
• 8 – 24V AC/DC.
• 115 – 230V AC.

Sensor Supply
• 3.2, 8.2, 12, 24V DC.

Intrinsically Safe
• ATEX: II 1 GD EEx ia IIB/IIC T4 T 100 °C

Explosion Proof
• ATEX: II 2 G EEx d IIB T5

Communication
Function: All process data and settings can be read and modified through the communication link.
Protocol: Modbus RTU.
Interface: RS232 / RS485 2-wire or 4-wire / TTL.