The invention relates to a hand-held device for measuring an analyte concentra-tion in a sample of a body liquid having a display means (3) for displaying meas-ured values； a measured-value storage for storing measured values； a measuring unit for generating measured values through measurements of the analyte con-centration in samples of a body liquid； a clock for supplying the date and hour of the day； a control unit for generating measured value datasets, each containing a measured value supplied by the measuring unit as well as the date and hour of the measurement by which the measured value was obtained, and for writing them into the measured-value storage； and operating elements (4) that can be actuated by the user to set the clock, in which case the control unit will generate a time-correction dataset indicating the amount and direction of the setting effected. It is provided according to the invention that the control unit writes time-correction datasets into the measured-value storage so that a chronologically ordered se-quence is generated containing time-correction datasets and measured value datasets.本發明有關於一種測量體液樣本中分析物濃度之手持式裝置，其具有一顯示機構(3)用來顯示被測得的數值；一被測得的數值的儲存器用來儲存被測得的數值；一測量單元用來經由體液樣本中分析物濃度的測量來產生被測得的數值；一時鐘用來提供日期及一天的時間；一控制單元用來產生被測得的數值資料組，每一資料組都包含該測量單元所提供之被測得的數值以及該被測的數值被獲得之測量的日期與時間，及將這些資料寫入到該被測得的數值的儲存器中；及操作元件(4)，其可被使用者致動以設定時鐘，在此情況下該控制單元將產生一時間校正資料組其顯示該設定被實施的量值及方向。依據本發明，該控制單元將時間校正資料組寫入到該被測得的數值的儲存器中，使得一包含時間校正資料組及被測得的數值資料組之按照時間先後排序的序列被產生。
