DFM Marine fuel flow meter: overview of Counters, Parameters and Events

DFM Marine Counetrs, Parameters and Events

DFM Marine flow meter is hardware for direct measurement of fuel consumption in engine lines or fuel lines of boilers/burners, designed for fuel systems with hourly consumption from 20 to 4,000 l/h. Using hourly consumption data, DFM Marine also determines operating time of consumer, and also operating modes – “Idle”, “Optimal”, “Overload” – and determines attempts to tamper consumption.

The most informative fuel counter in the line of DFM Marine is the model with CAN J1939/S6 interface – it provides more than 60 useful Parameters and Counters, transmits data in standard and additional messages of J1939 standards, exchanges data with other flow meters of the same model and allows you to measure differential and total fuel consumption of 16 fuel consumers at the same time.

Best functions of DFM Marine flow meter

1. Monitoring instant and total fuel consumption, total engine operating time tracking – basic Counters that allow you to monitor the peak values ​​of parameters and receive general information about fuel consumption and operating time of vehicles/machines. Designed to detect real fuel consumption of each unit of machinery, and also to bring out fuel consumption rates.

2. Fuel consumption + operating time monitoring depending on engine load.

  • “Idling”, “Optimal”, “Overload”. Counters provide detailed information about the load on internal combustion engine (fuel system), which helps to plan maintenance individually for each vehicle, taking into account work performed. Using data, gathered by the counters, is possible not only to timely detect malfunctions that lead to an increase in fuel consumption/premature failure of machinery but also to choose optimal modes of vehicle operation.
  • Engine operation time in “Negative” mode records the airiness of the system and/or the presence of foam in return line, which is a marker of a malfunction of fuel system or poor technical condition of engine.

3. Differential or summary consumption monitoring – for fuel systems, where it is necessary to use two or more flow meters for supply and “return”.

For differential measurement, a Master-flow meter is a flow meter, which is installed in fuel feed line, Slave-flow meter is a flow meter installed in reverse fuel line. In summarization mode, primary and secondary roles of flow meters are assigned arbitrarily.

Each DFM Marine has a built-in flow computer and can subtract/sum data from several other flow meters in one wired network.

Differential or summary consumption monitoring

The differential consumption Counter allows you to measure fuel consumption without changing the fuel scheme. The summary consumption Counter calculates summary consumption of two fuel consumers. “Master-Slave” mode is used for any two flow meters without preliminary selection and mutual calibration.

4. Resettable fuel consumption and operating time counters – special counters-timers to monitor fuel consumption in a given period of time (for a work shift/time for a specific task). Allows fleet manager to identify real fuel consumption per trip/work shift/task of unit of vehicle|machinery, as well as real engine operating time. Reset does not affect other DFM Marine Counters.

5. “Tampering”, “Interference” Event Counters detect attempts of unauthorized influence on flowmeter.

  • If fuel consumption rate is higher than usual, which occurs when blowing the air through measuring chamber, DFM Marine automatically turns on Fuel Consumption and Tampering time Counters, which calculate “tampered” fuel volume.
  • “Interference time” fixes the time of exposure of electromagnetic interference (in order to suspend metering or falsify readings) on flow meter.

DFM Marine Events

6. Work according to NMEA 2000 standard – communication standard for marine water transport. Thanks to NMEA 2000, DFM Marine can be used to monitor fuel consumption/engine operating time and other parameters of engine operation on the sea and river vessels, boats, ships. DFM Marine flow meter can be integrated into a boat’s standard system and output data to the cockpit dashboard and/or transfer to a compatible terminal.

DFM Marine integrated into a boat's fuel system

7. Definition of “Power on/off” Events. When DFM Marine is disconnected from on-board network, flow meter continues to work from built-in battery. Data is recorded in the internal memory, and the fact of external power failure is recorded as the special Event. When external power is restored, all gathered data is transmitted to monitoring terminal.

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