DISPENSER WITH CLOSURE DETECTION

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...

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Bibliographische Detailangaben
Hauptverfasser:	KATOU YUUKO, KATAKI HITOMI, KAWANABE JUNICHI, TAKEDA MASAAKI
Format:	Patent
Sprache:	eng
Schlagworte:	INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS TESTING
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Beschreibung
Zusammenfassung:	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.