Patent ID: 6096558
Filing Date: 2000-08-01
Classification: G01N,Y10S,Y10T

Abstract:
A process for calibrating a breath alcohol-measuring instrument with a calibrating gas generator with a liquid container containing an aqueous ethanol solution and an air feed for allowing air to bubble through the ethanol solution creating saturated air and for sending the saturated air from the atmosphere above the ethanol solution to the breath alcohol-measuring instrument, the process comprising the steps of:measuring the temperature of the ethanol solution with a thermometer;generating an electric signal representing the temperature measured;receiving the electric signal in a transmission means and passing on the electric signal or a conditioned signal prepared from the electric signal to the breath alcohol-measuring instrument and into an electronic evaluating unit;automatically converting a measurement result obtained by the breath alcohol-measuring instrument in the electronic evaluating unit to a measurement result to be expected at a preset reference temperature by means of a preset dependence on the temperature of the aqueous ethanol solution obtained from the electric signal or from the conditioned signal and on the preset reference temperature; andevaluating the measurement result expected at the preset reference temperature to calibrate the breath alcohol-measuring instrument.