| 摘要 |
PURPOSE:To enable rapid and accurate calibration of a gas prtial pressure sensor by a constitution wherein a heater and a standard gas inlet pipe are constantly in contact with a standard liquid inside a calibrating vessel and the vessel is made rotatable obliquely to a level surface so tht a gas partial pressure sensor fitting hole is positioned below the level of the standard liquid at the time of calibration. CONSTITUTION:When a sensor 4 for measuring the partial pressure of a carbonic acid gas in blood under skin or the like is calibrated, it is fitted liquid-tightly to a sensor fitting hole 5 provided in a part of a cablirating vessel 1a, by a sensor pressing spring 10 through the intermediary of packing. The vessel 1a is usually set in a state that the fitting hole 5 is positioned above the level surface of a standard liquid 12. When calibration is conducted, the axis of the vessle 1a is tilted so that the hole 5 is positioned below the level surface, and is supported rotatably by a stand 11. In the standard liquid 12, a temperature controlling heater 6 and a standard gas blasting pipe 7 are arranged in such a manner that they are dipped constantly therein. When the calibration is conducted in this constitution, the sensor 4 is heated to a prescribed temperature simultaneously when the calibration is started and contacts with the standard liquid saturated with a standard gas, and thus the calibration can be performed accurately and rapidly. |
