Shimadzu Corporation

Shingo Masuda

Daiki Fukushima

Yasuhiro Kimoto

Yuki Komori

Kiyonori Koga

Masashi Yamane

Shinichi Yuki

Shori Kinoshita

A gas chromatograph is provided with a communication unit, a setting processing unit, a first operation reception unit, and a maintenance processing unit. The communication unit communicates with an outside. The setting processing unit sets any one of the plurality of maintenance modes to a default maintenance mode in response to an input from the outside via the communication unit. The first operation reception unit is provided in the housing and is configured to accept a progress operation for progressing a maintenance sequence corresponding to the default maintenance mode. The maintenance processing unit progresses the maintenance sequence stepwise each time the progress operation is accepted by the first operation reception unit. The first operation reception unit is commonly used even in a case where any one of the plurality of maintenance modes is set to the default maintenance mode.

Gas chromatograph with a housing including an operation reception unit

Provided is a gas chromatograph device capable of appropriately determining that a temperature of an entirety of a heating target has stabilized after cooling the heating target in a column oven to a target temperature after a temperature-rising analysis. A gas chromatograph device capable of performing a temperature-rising analysis cools an inside of a column oven by a cooling mechanism. When a detection temperature by a temperature sensor for detecting a temperature of the heating target has reached a target temperature after the inside of the column oven has been cooled, the heating target is heated by a heater. Upon reaching of the detection temperature of the temperature sensor to the target temperature, it is determined whether or not the temperature of the entirety of the heating target has stabilized based on power consumption of the heater.

Gas chromatograph device

A vial supply system is provided with: a sampler configured to supply a vial to a predetermined supply destination by a transport arm; a management device communicatively connected to the sampler, the management device being configured to manage a supply operation of the vial by the sampler; and a display device provided so as to be able to communicate with the management device. When a teaching mode for performing teaching for setting a position of a transport arm at the time when a transport arm of the sampler transports the vial to and from the supply destination is started, the management device is configured to cause the display device to display an operation to be performed by a user in the teaching.

Vial supply system and gas chromatography analysis system

In a gas chromatograph, a back-pressure calculation processorcalculates a back pressure for a first detector. The pressure calculation processorcalculates a pressure of a carrier gas in a branching part. The back-flow determination processorcompares the pressure of the carrier gas in the branching part calculated by the pressure calculation processorwith the back pressure of the first detector calculated by the back-pressure calculation processor, and if the pressure of the carrier gas in the branching part is smaller than the back pressure of the first detector, the back-flow determination processordetermines that the carrier gas will flow back. It is therefore possible to surely know that there is a possibility that a back-flow of the carrier gas will occur, by checking the determination result of the back-flow determination processor

Gas chromatograph

A gas chromatograph, which may have a complex device configuration, capable of starting an analysis by replacing residual gas in a column with a carrier gas in starting up the gas chromatograph and by increasing the temperature of a column oven to an analytical initial temperature immediately after completion of the replacement. Upon command to start a gas chromatograph, a control unit calculates the average linear velocity of a carrier gas using a formula based on information such as the inner diameter and the length of a column, the column head pressure and the column outlet pressure, and the type of carrier gas, which are set as analytical conditions, and, for example, based on a detected temperature of a column oven and further calculates gas replacement necessary time from the average linear velocity and the length of the column. Based on the calculated time, a start time is determined.

A flow controller including a flow channel resistance disposed in a carrier gas supply flow channel, a control valve, pressure detecting portionand a pressure difference detecting portion, a storage part storing a first calibration curve indicating a correlation between a pressure difference &#x394;p and a total flow volume fat the first set supply pressure Pand a second calibration curve indicating a correlation between a pressure difference &#x394;p and the total flow volume fat a second set supply pressure Plarger than the first set supply pressure Pis provided. A total flow volume f of the carrier gas is calculated based on the supply pressure pdetected by the pressure detecting portion, pressure difference &#x394;p information detected by the pressure difference detecting portion, the first calibration curve and the second calibration curve.

Flow controller and gas chromatograph apparatus using the same

When a flow rate of a carrier gas calculated by a column flow rate calculation unit is controlled to be a first flow rate, and when the flow rate of the carrier gas is controlled to be a second flow rate, the flow rates of the carrier gas are detected by a whole flow rate detection unit, and a gas leakage determination unit determines of leakage of the carrier gas on the basis of the rates. Since the flow rate of the carrier gas is changed and the detected value of the whole flow rate detection unit is used at different flow rates, a case can be discriminated where an offset occurs in the detected value of the whole flow rate detection unit and a case where leakage of the carrier gas occurs. Thus, it is satisfactorily determined the presence or absence of the leakage of the carrier gas.

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Kyoto, Japan

Shingo Masuda