| 摘要 |
PROBLEM TO BE SOLVED: To provide a flame type atomic absorption photometer capable of automatically inspecting a fault of the threshold of a pressure switch, reliably detecting a pressure drop in a supply channel, and improving safety. SOLUTION: The atomic absorption photometer is provided with: supply channels 13, 14, 17 for supplying a combustion gas or a supporting gas to a burner 15; on/off valves 11, 12, 16 set up at the supply channels 13, 14, 17; pressure switches 19, 23 connected to the supply channels 13, 14 between the on/off valves 11, 12, 16 and the burner 15; and a delay time measurement means 6 for measuring delay time until the output of the pressure switches 19, 23 changes after opening or closing the on/off valves 11, 12, 16. Further, the atomic absorption photometer is provided with: an inspection means 31 for inspecting the fault of the pressure switches 19, 23 by comparing the delay time with appropriate delay time; and an interlock means 32 for controlling the lighting and extinguishment of the burner, based on the inspection result. COPYRIGHT: (C)2009,JPO&INPIT
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