Automatic in-situ calibration system and method for pressure and differential pressure transmitter

The invention relates to the technical field of remote calibration of force instruments and meters, and discloses an automatic in-situ calibration system and method for a pressure and differential pressure transmitter, and the system comprises a transmitter calibration pipeline system, a gas supply device, a measurement device, and a controller. The gas supply device is used for providing calibration gas for the transmitter calibration pipeline system; the transmitter calibration pipeline system comprises a differential pressure transmitter pipeline and a pressure transmitter pipeline, and the differential pressure transmitter pipeline and the pressure transmitter pipeline provide calibration interfaces for a differential pressure transmitter and a pressure transmitter to be connected with a gas supply device respectively; the measuring device is used for collecting analog quantity signals or digital quantity signals output by the differential pressure transmitter or the pressure transmitter; and the controll