After the automatic instrument is installed, how to debug the electromagnetic flowmeter
As we all know, after completing the installation of the automatic instrument, the relevant technicians also need to perform a reasonable test on the instrument to prevent some parts inside the instrument from being lost or damaged. If such problems are detected, the technicians need to perform maintenance in time. Instrument debugging and installation are very important operation steps, which are indispensable. For example, after a chemical plant in Guangzhou installed the automatic instrument, the construction personnel did not test it. After using the instrument for a month, a fire started. After the fire personnel investigated, it was found that the cause of the fire was the inside of the instrument. The electromagnetic flowmeter has a short circuit.
1. Technical points of electromagnetic flowmeter debugging
When debugging the electromagnetic flowmeter, the following two methods can be used:
First, if the converter in the electromagnetic flowmeter can be used normally, but the computer does not receive the signal, in this case, the multimeter can be used to complete the comprehensive detection of the electromagnetic flowmeter. There are two final test results, one is displayed, at this time, the problem can be accurately found, and then targeted maintenance can be carried out; the other is not displayed, then the next step of testing is required.
Second, the data information of the electromagnetic flowmeter cannot be displayed. In this case, a comprehensive inspection must be carried out. Of course, after the inspection, if there is no problem with the circuit, it can be proved that the problem is inside the electromagnetic flowmeter. Check whether the circuit board is burned out. If it is burned out, replace it with a new circuit board; if it is not burned out , a more detailed inspection of the circuit board is required.
2. Debugging of the instrument
(1) Systematic testing
During the formal systematic debugging of the instrument, it is necessary to ensure that the instrument and the equipment of the system respond in real time. If there is no problem with the system debugging, then the following work can be carried out:
First, the specifications and safety specifications of the instrument meet the relevant regulations;
Second, after the instrument has been verified by experiments, the air tightness meets the requirements;
Third, the instrument still meets the requirements after passing the tests of pressure and air pressure.
(2) Instrument loop test
After completing the debugging of the instrument, it should meet the following conditions:
First, ensure that the error is within the range specified by the automated instrument;
Second, the deviation value cannot exceed the range required by the automated instrument, mainly because all errors cannot be completely eliminated, so effective measures should be taken to reduce the relevant errors and deviation values as much as possible, and strictly control them within a safe range. within the range.
Of course, after all the installation and commissioning work of the instrument is completed, each worker involved must issue a corresponding report after completion, and submit it to the technician for verification and signature confirmation, so as to not only discover some hidden objects in the instrument in time problems, but also to help improve the operator's work skills and experience.
