| 摘要 |
A system for displaying a units categorized value corresponding to the cumulative amount of fluid dispensed from a delivery system having a hand-held nozzle with a trigger actuable by an operator to admit fluid through the nozzle. A display is mounted upon an enclosure to be responsive to a control signal for displaying visually perceptible indicia in selected increments corresponding to the units categorized value. A processor is provided within the enclosure for deriving the control signal. The processor is responsive in a calibration mode to the actuation of an operator switch by the actuation of the trigger of the hand-held nozzle to derive a calibration count value corresponding to the time elapsed in dispensing a predetermined unit amount of fluid. The processor is further responsive in a run mode to derive an incrementing run count value corresponding to the time elapsed in dispensing an amount of fluid, and to compare the incrementing run count value and the calibration count value for deriving the control signal incrementing the units categorized value when the run count value equals the calibration count value.
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