Sample analyzer and information writing method

A sample analyzer comprising:

• a specimen preparation section configured to prepare a measurement specimen from a sample and reagent;
• a measurement unit configured to measure the measurement specimen;
• a reagent container set section for setting a reagent container which contains the reagent, wherein a recording medium storing a kind information indicating a kind of the reagent is attached to the reagent container;
• a reader/writer configured to read out an information from the recording medium attached to the reagent container set in the reagent set section and configured to write an information on the recording medium;
• a cover which is provided in the reagent container set section, the cover moves to an open position where the setting of the reagent container in the reagent container set section is permitted and a closed position where the setting of the reagent container in the container set section is not permitted;
• a sensor configured to detect movement of the cover to the open position and detect movement of the cover to the closed position, and to output a signal indicating the cover at the open position or the closed position;
• and
• a processor communicably connected to the sample analyzer and programmed to:
• receive the signal,
• control the reader/writer to read out the information from the recording medium attached to the reagent container set in the reagent container set section, in response to receiving the signal indicating the opening of the cover, and
• control the reader/writer to write out the information from the recording medium attached to the reagent container set in the reagent container set section, in response to receiving the signal indicating the opening of the cover.