1. When disassembling or adjusting instruments, the original position should be recorded for restoration.

2. In the maintenance work of instruments and meters, the first step is to understand the basic principles of instruments and meters, master the knowledge and skills related to electronics, and prepare all technical materials such as manuals and drawings of instruments and meters. In addition, a good work quality should be developed to improve the rate and reduce errors in the maintenance work of instruments and meters.

3. When repairing precision instruments and meters, if small parts accidentally bounce off, the first thing to do is to identify the possible place where they may have fallen off. Do not search east or west, but use magnetic scanning and line of sight scanning methods to search for them.

4. It is necessary to use a multimeter to measure the smoothness of each point on the printed circuit when troubleshooting instruments and meters in a humid environment.

Because the main fault in this situation is copper foil corrosion.

5. When using logic pens and oscilloscopes to detect signals, be careful not to make the probe contact both measuring pins at the same time, as this situation essentially forms a short circuit when powered on. When detecting the filtering capacitor in the power supply, the positive and negative poles of the electrolytic capacitor should be short circuited first, and do not use probe wires instead of wires to discharge the capacitor during the short circuit.

　　

The above is an analysis of the maintenance precautions for the lubricating oil pour point analyzer.