F126-EL - Flow computer

F126-EL - Flow computer
with temperature compensation for corrected liquid volume

The F126-EL flow computer has been developed to calculate corrected liquid volume at normal conditions. The corrected volumetric flow is calculated by measuring the uncorrected volumetric flow and actual line temperature which is processed with the thermal expansion coefficient algorithm stored in the flow computer. The reference temperature can be defined as desired (e.g. 15°C, 20°C or 60°F).
The display shows the compensated flow rate, total, accumulated total and the actual line temperature. 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 based on a temperature/expansion relationship.
• Displays actual line 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.
• Engineering units for flow rate, total and temperature on the display.
• Green LED backlight.
• Auto backup of settings and running totals in EEPROM memory.
• Operational temperature: -40°C to +80°C (-40°F to 176°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 liquids at normal conditions is desired without the influence of thermal product expansion.

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.

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 G Ex ia IIB/IIC T4 Ga
II 1 D Ex ia IIIC T100 °C Da IP6X
• IECEx:
Ex ia IIC/IIB T4 Ga
Ex ia IIIC T100 °C Da IP6X

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.