Abstract: An automatic calibration apparatus for a partial gas pressure measuring sensor supplies a gas having a high partial pressure (referred to as the high gas) and a gas having a low partial pressure (referred to as the low gas), to a gas selection device (103) from a gas supplier (101) through a detector device (102) which detects an abnormal gas supply condition outside given, satisfactory gas supply conditions. The selection device (103) selects the high gas or the low gas for supplying the selected gas to a sensor support (27 or 104). A partial gas pressure measuring sensor to be calibrated is placed on the sensor support and an automatic calibration controller (106) stores an output of the partial gas pressure measuring sensor (105) in an information storing memory. When the detector device, detects an abnormal gas supply of the high gas or the low gas, the automatic calibration controller stops the storing of the output of the partial gas pressure measuring sensor (105) in the storing means (107).

Abstract: A patient monitor monitors information on body condition. The monitor includes a sensor for detecting information on body condition and converting the detected information into an electrical analog signal. The electrical analog signal is converted into digital measured values and sampled by a data processor at a predetermined time interval. Or, the data processor calculates a representative data value from a predetermined number of digital measured values to obtain summary data. Continuity or discontinuity is determined from successive blocks of summary data. A read-write storage for the summary data and two different kinds of delimiters correspond to the cases where the continuity and discontinuity of successive blocks of summary data are identified.