UNIFLOW-200 FLOW COMPUTER

Galvanically isolated I/O points.
Trouble-free, no potentiometers, no batteries.
Input and output channels are software calibrated.

The UNIFLOW-200 MFC can accommodate up to 5 I/O boards. Different combinations of analog, PRT, pulse and digital inputs, analog, pulse and digital outputs make the UNIFLOW-200 MFC suitable to solve any flow measurement problem.

The input and output channel assignment is freely configurable. Different meter runs can share the signal output of the same transmitter. Several output channels can be assigned to the same variable (e.g. flow rate), if different interfacing systems require independent output channels.

All input and output channels are galvanically isolated and protected against overvoltage and miswiring (short circuit and overload). No earthing problem in the current input loops.

Resistance thermometers are connected to RTD inputs using the 4-wire connection method. In case of individually calibrated sensors the flow computer converts the measured resistance to temperature using the Calendar Van Dusen A, B, C and R0 constants.

High frequency inputs can receive pulse or frequency signals from flow meters. They can be configured for density transducers, too. The input signal level is software selectable from NAMUR, active 5 V, active 15 V or open collector.

Digital inputs can be used to signal the status of any dual state device, e.g. on/off valves. It also accepts low frequency (max. 50 Hz) pulse signals from flow meters (e.g. positive displacement meters).

Digital outputs can be configured as:

• pulse output representing flow totals,
• alarm output signaling high or low limit of any input channel or flow rate, control output to open or close valves for example,
• repeat the change of state of any digital input, or
• time base.

The NO or NC state of the digital output is selectable. 

UNIFLOW-200 supports HART transmitter protocols and has serial interfaces for gas chromatographs and ultrasonic flow meters (Modbus, Instromet US meter protocols).

The UNIFLOW-200 MFC is capable to receive flow rate, pressure, differential pressure and temperature signals from smart transmitters according to HART protocols, eliminating this way the uncertainty related to D/A and A/D conversion in the transmitter and in the flow computer.

The UNIFLOW-200 has built-in protocol for Sick, Instromet, Daniel, Siemens, Flexim, Krohne, Caldon and Panametrics ultrasonic meters.

UNIFLOW-200 is prepared to poll process gas chromatographs (Daniel, ABB, Yamatake, Yokogawa) for on-line gas composition data. It is also prepared for the on-line gas properties calculation, further improving the accuracy of the flow and energy content calculation.

UNIFLOW-200 is able to interface with flow metering devices (e.g. ultrasonic meter) via serial link. It allows not only the acquisition of flow information (uncorrected volume flow rate) digitally, but makes it possible to read and display the diagnostic information from the flow meters as well. There is no need to run special service software to check the ultrasonic meter; its correct operation (its “health status”) can be checked any time using the display of the flow computer.

Store 400 days of reports, access alarm and event logs remotely.

Hourly, shift, daily, multi-day and monthly reports are stored in the non volatile memory.  Besides the periodic totals, average, minimum and maximum values of the inputs and calculated parameters are stored in the reports.

Archived data can be called up on the display, can be printed out using the serial link, can be copied to the pendrive via USB port and can be transferred by means of the U200ToolBox software.

Alarms are stored with timestamps in the alarm log file. Any modification of the flow computer parameters is recorded in the event log file. Gas composition data downloaded from a supervisory system or read from a gas chromatograph are recorded in the log file as well.

The alarm, event and download archives can be called up on the display, can be copied to the pendrive and can be uploaded to a PC for further investigation. The storage capacity allows archiving metering data, alarms and event log for 400 days.