Measuring device and methods for use therewith
First Claim
Patent Images
1. An apparatus for use with a reaction cell having a first electrode and a second electrode, the apparatus comprising:
- a voltage or current source providing a controllable voltage or current to the first electrode;
a voltage sensor sensing voltage provided at the first electrode;
an amplifier;
switch means switchable between first and second positions, said switch means in said first position disposing the amplifier to measure current through the second electrode, thereby measuring current through the reaction cell, said switch means in said second position disposing the amplifier to measure voltage present at the second electrode.
3 Assignments
0 Petitions
Accused Products
Abstract
The ability to switch at will between amperometric measurements and potentiometric measurements provides great flexibility in performing analyses of unknowns. Apparatus and methods can provide such switching to collect data from an electrochemical cell. The cell may contain a reagent disposed to measure glucose in human blood.
-
Citations
15 Claims
-
1. An apparatus for use with a reaction cell having a first electrode and a second electrode, the apparatus comprising:
-
a voltage or current source providing a controllable voltage or current to the first electrode; a voltage sensor sensing voltage provided at the first electrode; an amplifier; switch means switchable between first and second positions, said switch means in said first position disposing the amplifier to measure current through the second electrode, thereby measuring current through the reaction cell, said switch means in said second position disposing the amplifier to measure voltage present at the second electrode. - View Dependent Claims (2)
-
-
3. A method for use in a test equipment apparatus having an electrochemical cell disposed to receive a bodily fluid of a human user, the apparatus comprising electronic circuitry, the method comprising the steps of:
-
under automatic control of the electronic circuitry, allowing electrical current to flow through the cell by means of a current source or source of potential external to the cell and measuring said current; thereafter, under automatic control of the electronic circuitry, ceasing the flow of electrical current from the current source or source of potential external to the cell;
thereafter, under automatic control of the electronic circuitry, measuring an electrical potential at the cell; andevaluating a function of the measured current and the measured electrical potential, whereby a measure of characteristic of the bodily fluid is evaluated. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
Specification