F115 - Bi-directional flow rate indicator / totalizer

F115 - Bi-directional flow rate indicator / totalizer
with analog, pulse signal and flow direction outputs

The F115 has been developed for applications where the direction of flow is an issue. It is required to offer two pulse signals from the flowmeter which are 90° or 270° degrees out of phase. In case of a reverse flow, the flow rate will be displayed as a negative value, the totalizers will count down and a switch output will be set. The pulse and analog outputs do reflect both flow directions.
On-screen engineering units 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
• Quadrature input to detect the direction of flow.
• Displays positive and negative flow rate to indicate the flow direction.
• Total and accumulated total count up and down accoording to the flow direction.
• Analog and pulse outputs.
• Displays total and flow rate simultaneously.
• Large digit selection for flow rate or total.
• Flow rate: seven 17mm (0.67") or 8mm (0.31") digits.
• Total - resettable: seven 17mm (0.67") digits.
• Accumulated total - not resettable: eleven 8mm (0.31") digits.
• Separate engineering units for flow rate and total 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
Bi-directional flow measurement applications can be found by loading and unloading of ships where one bi-directional flowmeter is used.
An other application is the correction for back-flow due to shocks in a pipeline caused by piston pumps or valve behavior.

Flowmeter Inputs
• Pulse type inputs:
Reed-switch, NAMUR, NPN/PNP pulse, Sine wave (coil), active pulse signal.
Different pulse signal types are allowed for input A and B.

Pulse Outputs
• Function: Scaled pulse output according to the bi-directional accumulated total (e.g. a pulse every 3.25 gallons).
Max. frequency: 64Hz.
Adjustable pulse length from 8 msec. to 2 seconds. The directional switch output is switched as soon as the pulse output reflects a "negative" quantity.
• Type: Two passive NPN transistors, active PNP transistors or isolated electro-mechanical relays.

Alarm Outputs
• None.

Analog Outputs
• Function: Re-transmitting the positive and/or negative flow rate - the output can be scaled to any range (e.g. +40 L/min to +600 L/min and -40 L/min to -600 L/min or positive flow rates only).
• 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 Output 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 ASCII / RTU.
Interface: RS232 / RS485 2-wire or 4-wire / TTL.