Calibration method for a pulse response flowmeter
First Claim
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1. A calibration method for a flowmeter delivering an electric pulse signal whose frequency corresponds to the rate of flow of a fluid circulating in a circuit, the method including the steps of:
- measuring during a data acquisition stage of a specified duration (Ta), each elementary period (T7 (i), T8 (i)) separating two pulses staggered by a specified measurement span;
counting the number of pulses (n, m) emitted during the acquisition stage (Ta); and
calculating the mean calibration period (Tm7, Tm8).
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Abstract
The invention relates to a method of and apparatus for calibrating flowmeters which may be employed in a dialysis liquid circuit. The invention includes the steps of measuring during a data acquisition stage of a specified duration (Ta), each elementary period (T7 (i), T8 (i)) separating two pulses staggered by a specified time measurement span (P), counting the number of pulses (n, m) emitted during the acquisition stage (Ta), and calculating the mean calibration period.
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Citations
17 Claims
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1. A calibration method for a flowmeter delivering an electric pulse signal whose frequency corresponds to the rate of flow of a fluid circulating in a circuit, the method including the steps of:
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measuring during a data acquisition stage of a specified duration (Ta), each elementary period (T7 (i), T8 (i)) separating two pulses staggered by a specified measurement span; counting the number of pulses (n, m) emitted during the acquisition stage (Ta); and calculating the mean calibration period (Tm7, Tm8). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A control and processing unit for calibrating a system of two flowmeters, each flowmeter delivering an electric pulse signal (S) whose frequency corresponds to a rate of flow of a fluid, the unit comprising:
- a microprocessor connected to the flowmeters for receiving information corresponding to elementary periods (T7 (i), T8 (i)) separating two pulses staggered by a specified measurement span (P);
a counter for measuring each elementary period separating two pulses emitted by each one of the flowmeters; means for counting the pulses emitted during considered elementary periods; and programming means for processing the elementary periods to determine a mean calibration period for each flowmeter.
- a microprocessor connected to the flowmeters for receiving information corresponding to elementary periods (T7 (i), T8 (i)) separating two pulses staggered by a specified measurement span (P);
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17. A calibration device for a flowmeter which delivers an electric pulse signal (S) whose frequency corresponds to the rate of flow of a fluid, the device comprising:
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means for measuring during a data acquisition state of a specified duration (Ta), elementary periods (T7 (i), T8 (i)) separating two pulses staggered by a specified measurement span (P); means for counting a number of pulses (n, m) emitted during the data acquisition stage (Ta); and means for calculating an average calibration period (Tm7, Tm8).
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Specification