| abstract |
An apparatus and method are provided for calibrating a measuring transmitter which provides an output signal proportional to a parameter of interest measured by a sensor in the measuring transmitter without removing the measuring transmitter from its normal operating position. The apparatus includes a housing, a calibration sensor element located in the housing for sensing said parameter of interest, and a tube for coupling the housing to the measuring transmitter, thereby exposing the calibration sensor to the same parameter of interest as the measuring sensor in the measuring transmitter. The apparatus also includes a communication link for coupling the measuring sensor to the calibration sensor, and a processor for processing data related to the parameter of interest detected by the calibrating sensor, for comparing the processed data related to the parameter of interest detected by the calibrating sensor to processed data related to the parameter of interest detected by the measuring sensor, and for calibrating the measuring sensor based on the comparison. |