PL6 V1.1 power sourse问题

helicopter007

手头有一台PL6，收来的！
官网说明书上说开机后按任一按钮，会出现power sourse选择电源模式，但是我这个PL6开机按任一按钮直接进入某一个充电模式，想问下用过PL6的人，这是什么问题？
1. Connect PowerLab 6 to a 10–32V DC power supply or Lead Acid battery.
2. Press any button on PowerLab 6’s panel.
3. At the Power Source? screen, use the INC or DEC button to select Battery or DC Power Supply (i.e., what is currently powering the PowerLab 6).