Solution to the problem of reverse connection of differential pressure transmitter pressure pipe
When measuring the liquid level of a container, the instrument output is based on the principle of increasing rise and decreasing fall. The high-pressure side is connected to the pressure pipe at the bottom of the container, and the low-pressure side is connected to the pressure pipe at the top of the container. When measuring flow with a throttling device, the positive pressure conduit is connected to the high-pressure side of the transmitter, and the negative pressure conduit is connected to the low-pressure side of the transmitter. The above two situations are the normal connection methods for the transmitter.
So if the high and low pressure conduit connections are reversed, can the transmitter work normally or does it need to be removed and reconnected? Below is an introduction to the handling of the reverse connection of the differential pressure transmitter's pressure conduit.
But when measuring flow, if the pressure pipe is connected in reverse, it usually cannot work normally and needs to be removed and reconnected.
Forward refers to the increase of differential pressure signal and output of the transmitter, while reverse refers to the increase of differential pressure signal and decrease of output. However, for any transmitter with forward and reverse conversion, if the pressure pipe is connected in reverse, simply change it to reverse output state and add a certain zero point positive and negative shift to make the transmitter work in the normal output direction.