| 摘要 |
A carbon dioxide analyzer for medical purposes is rendered self-calibrating by continuously measuring pairs of two or three each of several components as follows: 1st pair: vacuum cell, open hole and sample cell reference cell, open hole and sample cell 2nd pair: vacuum cell, standard cell reference cell, standard cell 3rd pair: vacuum cell, open hole reference cell, open hole 4th pair: vacuum cell, standard cell, sample cell reference cell, standard cell, sample cell The ratios of these measurement pairs are treated mathematically in a computer or microprocessor to obtain a reading for CO2 and to correct other readings and to monitor the integrity of the standard cell. A novel two-wheel chopper and mirror arrangement facilitates the measurements.
|
