Apparatus and method for verifying the volume of liquid dispensed by a liquid-dispensing mechanism
First Claim
1. An apparatus for determining the volume of liquid dispensed by a liquid-dispensing mechanism or the flow of gaseous fluid in the vicinity of a liquid-dispensing mechanism, said apparatus comprising:
- (a) at least one weigh cup;
(b) at least one standard mass;
(c) at least one transducer assembly to convert a value of weight to a an electrical response; and
(d) at least one electronic circuit for converting said electrical response to a measurement of volume of liquid dispensed.
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Accused Products
Abstract
An apparatus for improving the procedure for quantifying the volume of liquid dispensed by a liquid-dispensing mechanism of an analytical instrument. The apparatus of this invention comprises (a) at least one weigh cup; (b) at least one standard mass; (c) at least one transducer assembly to convert a value of weight to an electrical response; and (d) at least one electronic circuit for converting the electrical response to a measurement of volume. This invention provides a method for calibrating readings of the volume of liquid dispensed by a liquid-dispensing mechanism of an analytical instruments so that absolute measurements of the volume of liquid dispensed can be obtained.
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Citations
16 Claims
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1. An apparatus for determining the volume of liquid dispensed by a liquid-dispensing mechanism or the flow of gaseous fluid in the vicinity of a liquid-dispensing mechanism, said apparatus comprising:
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(a) at least one weigh cup;
(b) at least one standard mass;
(c) at least one transducer assembly to convert a value of weight to a an electrical response; and
(d) at least one electronic circuit for converting said electrical response to a measurement of volume of liquid dispensed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for verifying the volume of a liquid dispensed by a liquid-dispensing mechanism, said method comprising the steps of:
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(a) providing an apparatus comprising;
(1) at least one weigh cup;
(2) at least one standard mass;
(3) at least one transducer assembly to convert a value of weight to an electrical response; and
(4) at least one electronic circuit for converting said electrical response to a measurement of volume of liquid dispensed;
(b) recording the value of weight of said at least one standard mass;
(c) recording the value of weight of said at least one weigh cup when said at least one weigh cup is empty;
(d) computing the gain of said apparatus;
(e) measuring a plurality of volumes of liquid dispensed in sequence; and
(f) calculating the mean value of said volumes of liquid dispensed. - View Dependent Claims (13, 15)
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14. The method of step 13, further comprising the step of calculating the standard deviation for said plurality of dispensations of liquid.
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16. A method for verifying the volume of a gaseous fluid dispensed in the vicinity of a liquid-dispensing mechanism, said method comprising the steps of:
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(a) providing an apparatus comprising;
(1) at least one weigh cup;
(2) at least one standard mass;
(3) at least one transducer assembly to convert a value of weight to an electrical response; and
(4) at least one electronic circuit for converting said electrical response to a measurement of volume of liquid dispensed;
(b) recording the value of weight of said at least one standard mass;
(c) recording the value of weight of said at least one weigh cup when said at least one weigh cup is empty;
(d) computing the gain of said apparatus;
(e) determining rate of flow of gaseous fluid that is applying a force to said at least one weigh cup; and
(f) calculating the mean value of said rate of flow of gaseous fluid.
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Specification