| 摘要 |
PURPOSE:To detect not only complete closure of a nozzle but also incomplete closure in a separate injector for dispensing sample by a nozzle. CONSTITUTION:Pressure of an air hose 12 connected to a nozzle 10 for sucking sample 18 is detected by a pressure sensor 20, and the detected value is sent to a closure detection part 26. In the closure detection part 26, a plurality of pressure calculation periods are set, and pressure difference in each calculation period has been calculated. When the pressure difference exceeds a predetermined threshold corresponding to a calculation period in each calculation period, closure is alarmed. Since a plurality of pressure calculation periods have been set, not only complete closure but also incomplete closure can be detected to improve dispensing accuracy. |
