3051 differential pressure transmitterDuring the measurement process, some problems often arise, and timely identification, analysis, and disposal of these problems are crucial for the equipment being put into use. To a certain extent, it will affect the normal production process and even endanger production safety. Based on the manufacturer's research, some common problems have been identified, analyzed, and dealt with.
1. Line malfunction; When the computer displays abnormal values, the first thing to do is to flip it over3051 differential pressure transmitterThe junction box can be used to check whether the circuit is virtual, short circuited, or disconnected. By measuring the power supply, measuring resistance, shaking insulation, and other methods, faults can be identified and dealt with. Malfunction of the acquisition module or differential pressure sensor; When cleaning up circuit faults, it is important to check if there is a problem with the acquisition module or differential pressure sensor. Use a multimeter to check if the working power supply of the differential pressure transmitter is normal. Measure the output current value of the differential pressure transmitter together to see if it is within the range of 4mA~20mA (if it is the output voltage value, measure if it is within the range of 0~5V), and confirm if the output value is normal. If there is no output value,3051 differential pressure transmitterDamaged, it is necessary to replace the differential pressure transmitter. If the on-site measurement value conversion matches the practical experience value, there is no doubt about the appearance and measurement points on site, and the module is damaged and needs to be replaced. When the on-site measurement value conversion matches the computer display value, it indicates that there is a problem with the impulse pipe or differential pressure transmitter.
2. Pressure pipe malfunction
(1) Blockage of the pressure pipe: In practical production and application protection, due to delayed discharge or dirty, sticky or particle laden media, some may solidify over time, causing blockage of the pressure pipe and preventing normal measurement. Therefore, to ensure the normal operation of the transmitter, it is necessary to regularly clear the pressure pipe.
(2) Pressure pipe leakage: Because3051 differential pressure transmitterThere are many accessories such as contacts and shut-off valves, which leads to an increase in leakage points and an increase in the amount of protective work. Therefore, it is necessary to properly prevent corrosion of the pressure pipe and reduce the occurrence of sand holes in the pressure pipe; The screws at the interface of the pressure pipe should be tightened to prevent loosening.
(3) Fluid accumulation in the pressure tube; Due to incorrect gas flow pressure measurement methods or inadequate impulse piping equipment, there is often a phenomenon of liquid accumulation inside the impulse piping. The appearance of this kind of phenomenon often leads to measurement blockage, and if the transmitter range is very small, it may even cause some shaking of the transmitter output. Some literature suggests that the correct equipment for pressure pipes should be to continuously reduce the slope with a horizontal angle of not less than 1:12, and there should be a height difference between the measuring point and the equipment point. The pressure measuring point should be straight with the wall of the tested equipment. In order to make the measurement more accurate, several pressure measuring heads can be set up. All pressure measuring heads are connected together to form a pressure equalization tube, which is then led out through a pressure guiding tube. A drain valve is installed at the lowest point of the pressure equalization tube.
