It's a beautiful day today, and this time it's a signal to repair the electric meter. Before the operation, the foreman puts forward the operation items and division of labor according to the operation requirements. After we arrived at the scene 30 minutes early, I checked the meter through the front signal. I am already familiar with this kind of homework. Under the guidance of the master, I conducted tests and inspections according to the operating procedures. Although I have done it several times before, I still learned a lot during the period. 1 hour skylight repair will be over soon. But I know that what I have learned is only the daily maintenance of the table, which is far from the standard of dealing with sudden failures! I will work harder!

Diary of Railway Practice (8)

The relaxed May Day holiday passed, and I got up for dinner and work in the morning. Master asked me to test the polarity crossover with him. I took a multimeter and gadgets and followed the master to the scene. Master taught me the principle and application of polarity intersection while teaching me to test polarity intersection. First, the master asked me to test the rail surface voltage values of two insulated rails, and got two data u 1, u2, and two rail surface voltage values u3 and u4 on the same side of insulation, and got four data. Then according to the principle of polarity crossing, u 1≈u2 is greater than u3≈u4. This is the correct polarity intersection. After testing the polarity crossing of several sections with the master, I returned to the work area. The master told me that there are several testing methods for polarity crossing, and he taught me the most common and accurate method. You will gradually understand, learn step by step, accumulate knowledge slowly, and ask more questions if you don't understand.