1. The article was first posted on Jun. 28, 2024.

2. Revised on Jun. 29, 2024.

     Corrected the mistake in Fig. 10 Circuit diagram of the Control board.

3. Revised on Jul. 04, 2024.

     Added a X-axis and Y-axis waveforms figure FIG.9-1 to Chapter 4-3.

     Added a X-Y mode display figure  FIG. 9-2 to Chapter 4-3.  

4. Revised on Jul. 05, 2024.

     Added links of the wiring side photos to the Chapter 4-2, 4-3 and 4-4.

5. Revised on Jul. 08, 2024.

     Added the Table 1 of the specifications.

6. Revised on Jul. 09, 2024.

     Added the Video 2 of the internal structure from various angles to the Chapter 3.