Abstract: A method is disclosed for conditioning a gas sensor. The electrode arrangement of the sensor is surrounded by an electrolyte and is partitioned off from the atmosphere by a gas-permeable membrane. The electrode arrangement is introduced into a calibrating gas and the calibrating gas is kept in isotonic equilibrium with the electrolyte. The composition of the electrolyte is not varied substantially while maintaining the operating conditions of the sensor and without having to introduce the sensor into a medium containing the calibrating gas. For this purpose, the membrane of the sensor is covered with a gas-tight and water-vapor-tight overlay, and the isotonic equilibrium is brought about and maintained by means of the gas that diffuses out of the electrolyte through the membrane as far as the overlay.

Abstract: A method is disclosed for conditioning a gas sensor. The electrode arrangement of the sensor is surrounded by an electrolyte and is partitioned off from the atmosphere by a gas-permeable membrane. The electrode arrangement is introduced into a calibrating gas and the calibrating gas is kept in isotonic equilibrium with the electrolyte. The composition of the electrolyte is not varied substantially while maintaining the operating conditions of the sensor and without having to introduce the sensor into a medium containing the calibrating gas. For this purpose, the membrane of the sensor is covered with a gas-tight and water-vapor-tight overlay, and the isotonic equilibrium is brought about and maintained by means of the gas that diffuses out of the electrolyte through the membrane as far as the overlay.

Abstract: A method is disclosed for calibrating transducers for determining gas concentrations, in particular for the transcutaneous measurement of blood gases. In the method, the testing chamber is exposed on its measuring surface, through an overlay, to a known gas concentration. The method provides for a simpler application of the calibration medium to the measuring surface of the transducer, such that an overlay provided with substances required for furnishing the known gas concentration is applied directly onto the measuring surface of the testing chamber, covering it. An overlay is also disclosed and is embodied as a paper strip having two impregnated zones, separated from one another by an intermediate piece provided with a coating.