Yesterday, we received a response from the on-site customer, saying that when a V-cone flowmeter set by another company was put into use, the differential pressure transmitter displayed a negative differential pressure on site. At the beginning of this situation, we thought it was a very simple problem, because according to past experience, we can basically determine the problem of the positive and negative pressure chamber wiring of the differential pressure transmitter, but the customer response, the field differential pressure transmitter is using 3051 transmission. The device, wiring, and zero calibration have ensured that there are no problems. This makes us very puzzled. Finally, after communication, we can roughly determine the problem of the V-cone flow meter body measurement. The following is a check plan for the customer to determine:
1, first check the V cone flowmeter pressure pressure piping problems, to do, the pressure tube open. Check for leaks and congestion, because if this problem occurs, the differential pressure transmitter will be pressurized in one direction, which will cause the above negative pressure.
2, the second problem is more serious, is the V cone flowmeter body pressure port manufacturers do not do a good job, in this issue, we also and their own manufacturers technical staff ditch through, if the positive pressure welder technology is not done, then That is, the positive pressure of the disguised pressure is not smooth, and the above principle of leakage is basically the same.
For the above situation, the following describes how to solve the problem. For the problem of leakage of the pressure-reducing port, it is relatively convenient to check it. Directly introduce gas and observe the status of the pressure tube; if it is a problem of welding, then this is troublesome. If you are familiar with the V-cone flowmeter The person can use the equipment to operate it on the spot. If it is not OK, the V-cone flowmeter should be returned to the manufacturer for inspection and rework.
1, first check the V cone flowmeter pressure pressure piping problems, to do, the pressure tube open. Check for leaks and congestion, because if this problem occurs, the differential pressure transmitter will be pressurized in one direction, which will cause the above negative pressure.
2, the second problem is more serious, is the V cone flowmeter body pressure port manufacturers do not do a good job, in this issue, we also and their own manufacturers technical staff ditch through, if the positive pressure welder technology is not done, then That is, the positive pressure of the disguised pressure is not smooth, and the above principle of leakage is basically the same.
For the above situation, the following describes how to solve the problem. For the problem of leakage of the pressure-reducing port, it is relatively convenient to check it. Directly introduce gas and observe the status of the pressure tube; if it is a problem of welding, then this is troublesome. If you are familiar with the V-cone flowmeter The person can use the equipment to operate it on the spot. If it is not OK, the V-cone flowmeter should be returned to the manufacturer for inspection and rework.
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