Patent ID: 9267910
Filing Date: 2016-02-23
CPC Classification: G01N

Claim Text:
1. A test instrument for use with a human user and for use with an elongated test strip having at a first end an electrical connection point and at a second end an electrochemical cell, the test instrument comprising: a housing; an electrochemical cell comprising at least first and second electrodes and a reagent reactive with a constituent of a fluid sample; a source of potential or current external to the electrochemical cell and connected to the electrochemical cell for application of potential or current to the first and second electrodes; measurement circuitry external to the electrochemical cell for measuring an electrical signal generated in the electrochemical cell in response to application of potential or current; electronic control means, the electronic control means coupled with the source of potential or current to controllably apply the source of potential or current to the electrochemical cell; and potentiometric circuitry for measuring a decay in a chemical potential between the first and second electrodes in the absence of an applied potential or current, an electrical connector at the housing, the connector disposed to form an electrical connection with the electrical connection point of an elongated test strip when inserted therein; and a light source at the housing, the light source aimed to cast light upon the electrochemical cell of the elongated test strip, the light source illuminated in response to an input from a human user.