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F-Series: F126-EG

Field mount - 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.

Advantages
  • Robust IP66, IP67 (NEMA Type4X) field enclosure. It is so rugged, you can even stand on it!
  • Intrinsically Safe available - ATEX and IECEx approval for gas and dust applications.
  • Programming can be done by your own crew, with the sensible menu-driven structure, saving cost and irritation. Know one, know them all!
  • Very diverse mounting possibilities: walls, pipes, panels or directly onto outdoor sensors.
Application overview F126-EG

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.
  • LED backlight.
  • Auto backup of settings and running totals in EEPROM memory.
  • Ambient temperature: -40°C to +80°C (-40°F to 176°F).
  • Various accessories are available for this product.
  • The F-Series is so rugged, even a truck can stand on it!

Flowmeter Inputs

  • Pulse type inputs:
    Reed-switch, open collector, NAMUR, NPN/PNP pulse, Sine wave (coil), active pulse signal.
  • (0)4 – 20mA.

Temperature Inputs

  • PT100 - 2 or 3 wire PRTD sensor.
  • (0)4 – 20mA.

Pressure Inputs

  • (0)4 – 20mA.

Pulse Outputs

  • Function: Scaled pulse output according to accumulated total (e.g. a pulse every 3.25 gallons).
    Max. frequency: 500Hz.
    Adjustable pulse length from 0.001 sec. to 9.999 seconds.
    Only available with pulse inputs, Type: P.
  • Type: One passive NPN transistor, active PNP transistor or isolated electro-mechanical relay.

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.

Applications

  • The F-Series is your first and best choice for field mount indicators in safe and hazardous area applications. Especially in harsh weather conditions like rain, snow, salty atmospheres and temperatures between -40°C up to +80°C (-40°F up to 176°F).
  • Applications where net flow calculation of gasses at normal conditions is desired without the influence of thermal product expansion and pressure.
    Alternative basic models: F012, F014, F016, F110, F112 or the D-Series basic DIN panel mount indicators.

Power Supply

  • Long life Lithium battery.
  • 4 – 20mA Loop-powered.
  • 8 – 24V AC/DC.
  • 115 – 230V AC.
  • Basic: 8 - 30V DC.

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
  • IECEx:
    Ex ia IIC/IIB T4 Ga
    Ex ia IIIC T100 °C Da

Explosion Proof

  • ATEX:
    II 2 G / Ex d IIB T5 Gb
    II 2 D / Ex t IIIB T100°C Db

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.
– HART communication is available with the F018 Flow rate Monitor / Totalizer.

LCD example F126-EG
Photo F126-EG