Patent ID: 8906302

Claim:
A reagent preparing device for preparing a reagent to be supplied to a measurement device for measuring a specimen, comprising: water containing no antiseptic agent; a concentrated reagent containing an antiseptic agent; a supply chamber for storing the reagent, including the water containing no antiseptic agent and a containing the concentrated reagent antiseptic agent, to be supplied to the measurement device; a diluting chamber for preparing the reagent by diluting the concentrated reagent with the water and for supplying the reagent to the supply chamber, wherein the supply chamber and the diluting chamber are connected; a water chamber for storing the water containing no antiseptic agent and for supplying the water to the diluting chamber; a concentrated reagent chamber for storing the concentrated reagent and for supplying the concentrated reagent to the diluting chamber; a water discarding unit for discarding the water stored in the water chamber; and a processor programmed to: measure an accumulated time of the water in the water chamber; and control the water discarding unit to discard the water stored in the water chamber without discarding the reagent in the supply chamber when the accumulated time reaches a predetermined time, wherein the processor starts measurement of the accumulated time when the water in the water chamber is not supplied to the diluting chamber and the processor controls the water discarding unit to discard the water stored in the water chamber without discarding the reagent in the supply chamber when accepting an instruction to shutdown operation of the reagent preparing device.