Process for filling compressed gas fuel dispensers which utilizes volume and density calculations

A process for measuring a total mass of a pressurized fluid flowing through a conduit, comprising the steps of:

• (a) measuring a first volume, a first temperature and a first pressure of the pressurized fluid flowing through the conduit during a first timed interval of a sequence of a plurality of timed intervals;
• (b) calculating a first mass of the pressurized fluid flowing through the conduit during the first timed interval by applying the first temperature and the first pressure to an equation of state to determine a first density and multiplying the first density by the first volume to determine the first mass;
• (c) measuring a second volume, a second temperature and a second pressure of the pressurized fluid flowing through the conduit during a second timed interval of the sequence of the plurality of timed intervals;
• (d) calculating a second mass of the pressurized fluid flowing through the conduit during the second timed interval by applying the second temperature and the second pressure to the equation of state to determine a second density and multiplying the second density by the second volume to determine the second mass;
• and
• (e) calculating the total mass of the pressurized fluid through the conduit during the sequence of the plurality of timed intervals by summing the first and second masses of the pressurized fluid flowing through the conduit during the first and second timed intervals.