| 摘要 |
PURPOSE:To measure vapor pressure accurately in a short time by using a small amount of a sample by pressing the volatile material in a sampling cut to specific pressure with inert gas and passing it through a heat exchanger, and blowing the volatile material which is held at specific temperature out of a nozzle. CONSTITUTION:A valve 19 is opened valves 33 and 29 are closed to press the sample in the sampling cut 14 to the specific pressure with nitrogen gas. A valve 15 is opened to admit the sample the sample into a nozzle 7 through the heat exchanger 12 and then an absolute pressure transducer 13 is linked with the nozzle 7 by opening a valve 32 to transduce the outlet pressure at the port part of the nozzle 7 into an electric or air signal through the absolute value transducer 13, measuring vapor pressure. Then, the valve 33 is opened to perform line cleaning and then while valves 19, 15, and 32 are closed, a valve 27 is opened to discharge liquid and pressure from the sampling cut 14. Then, the valve 27 is closed and the valve 29 is opened to obtain the state right before the sample introduction into the sampling cut 14. |
