Whenever the project enters the debugging stage, we will encounter various problems. For example, signal isolator has been added, but the zero drift of differential pressure transmitter is still serious, which excludes the possibility of on-site interference. We can also find out the reasons from the following aspects. If there are many differential pressure transmitters with serious zero drift and some regular fluctuations in different time periods, the main reasons for this situation will be as follows:
(1) The quality of the transmitter itself;
(2) The pressure-guiding pipeline is not smooth;
(3) The influence of temperature;
(4) The influence of mechanical displacement.
In order to determine the cause of the problem, we have to investigate one by one. First of all, we need to check the pressure-guiding pipeline and check whether there is stress. If we find that there is a greater stress, we need to carry out stress relief work. Secondly, check whether the transducer installation is firm, because the mechanical displacement will occur if the transducer installation is not firm, resulting in the zero drift of the transducer. Therefore, it is necessary to check the installation of the transducer and carefully check whether the transducer bracket installation is firm. If it is found that part of the transducer bracket installation is not firm, it is necessary to tighten the transducer. At this time, the fault can be basically eliminated. Now.