2023/2/6    V0.1
更新示波器部分直流电压有效值测量问题
2023/3/23
示波器：
更新空载有效值偏大
优化自动档

2023/4/4     V0.21
1.更新示波器测直流VPP问题
2.修复电压测试切换不显示问题
3.修正“通断”，“校准”翻译

2023/4/5     V0.22
1.增加用户体验（不论设置响度多少，通断始终保持最大音量提醒）
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2023/2/6 V0.1
Update the oscilloscope part of the DC voltage RMS measurement problem
2023/3/23
Oscilloscope:
Update no-load effective value is too large
Optimize automatic gear

2023/4/4 V0.21
1. Update the oscilloscope to measure the DC VPP problem
2. Fix the problem that the voltage test switch does not display
3. Correct the translation of "on-off" and "calibration"

2023/4/5 V0.22
1. Increase user experience (regardless of the set loudness, on and off will always keep the maximum volume reminder)