Section 180.415 - Standard - Hematology: Quality Control(A) Instruments and other devices used in hematological examination of specimens shall be checked for calibration as may be appropriate, during each day of use.(B) Each procedure for which standards and controls are available shall be rechecked each day of use with standards or controls of two different levels for each parameter measured.(C) At least two reference control materials of different levels shall be included for each day of testing and when each new vial of coagulation testing reagent is used.(D) Reference materials, such as hemoglobin pools and stabilized cells, shall be tested at least once each day of use to insure accuracy of results.(E) The accuracy and precision of blood cell counts, hematocrit and hemoglobin measurements shall be tested each day of use.