In the practical application of the 3051 differential pressure transmitter, due to factors such as the installation position and maintenance of the transmitter, the positive and negative pressure chambers of the 3051 differential pressure transmitter and the pressure point of the container are on the same horizontal plane. Or the measured medium of the 3051 differential pressure transmitter is highly corrosive or the medium with high viscosity cannot be measured directly, and it is necessary to install devices such as isolation liquid tanks to prevent the 3051 differential pressure transmitter from being corroded. In this case, the 3051 differential pressure transmitter needs to move to the zero point in order to measure the correct level of the medium. The so-called zero point migration means that in order to ensure the effectiveness of the basic quantity of the transmitter during measurement, the basic quantity mainly includes the range, measurement accuracy, etc., and then takes the measurement starting point as the core to implement a numerical change safeguard measure. The significance of the zero point migration of the 3051 differential pressure transmitter is to promote the lower limit of the transmitter measurement signal and the input signal to coincide, the distinction between the zero point adjustment and the zero point migration depends on whether the Xmin is 0, when the Xmin is 0, it is the zero point adjustment, and vice versa. Migration is generally divided into two categories, one is positive migration, the starting point of migration at this time is selected as the end, and the value is 0, if the end measurement value gradually presents a positive value, then it can be regarded as positive migration, otherwise it is the second form of migration, which is called negative migration.

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