Reagent preparing device and specimen processing system

A reagent preparing device capable of supplying a predetermined reagent, which includes a first liquid and a second liquid different from the first liquid, to a measurement section for measuring a specimen using the reagent, comprising:

• a pressure generating unit for generating a pressure for transferring each liquid in the reagent preparing device;
• a diluting chamber for preparing the reagent by mixing the first liquid and the second liquid;
• a stirring chamber having an inlet for receiving the reagent prepared in the diluting chamber and an outlet for supplying the reagent accommodated therein to the measurement section by the pressure generated by the pressure generating unit;
• a standard container accommodating a standard liquid having a known electrical conductivity and connected to the stirring chamber through an introducing path;
• an electrical conductivity meter for measuring an electrical conductivity of the reagent or the standard liquid accommodated in the stirring chamber;
• a reagent discarding unit comprising a discarding flow path that is connected to the outlet of the stirring chamber for discarding the reagent accommodated in the stirring chamber, the electrical conductivity meter is disposed along the discarding flow path such that the electrical conductivity meter measures the conductivity of the reagent standard liquid being transferred from the stirring chamber to the discarding flow path;
• and
• a processor communicably connected to the reagent preparing device and programmed to:
• when preparing the reagent,
• receiving from the electrical conductivity meter a measurement result obtained by measuring the conductivity of the reagent accommodated in the stirring chamber;
• and
• controlling the chamber and the pressure generating unit to supply the reagent accommodated in the chamber to the measurement section according to the measurement result of the reagent received from the electrical conductivity meter, and
• when calibrating the electrical conductivity meter, controlling the reagent discarding unit to discard the reagent accommodated in the stirring chamber;
• controlling the pressure generating unit to introduce the standard liquid from the standard liquid container to the chamber through the introducing path;
• receiving from the electrical conductivity meter a measurement result obtained by measuring a conductivity of the standard liquid accommodated in the stirring chamber;
• and
• calibrating the electrical conductivity meter based on a known conductivity value of the standard liquid and the measurement result of the standard liquid received from the electrical conductivity meter.