1. First, turn on the instrument, plug in the 12V power adapter, turn on the instrument power switch, and the instrument starts self-checking and enters the automatic shielding mode.

2. Second, set automatic shielding. After the instrument host is turned on, press the shielding bar to select the automatic shielding mode, and the automatic indicator light will light up to enter the automatic shielding mode.

3. Then set the automatic recovery, press the screen bar to select the automatic recovery mode to enter the automatic recovery mode.

4. Finally, set the direct shielding, press the shielding bar to select the direct shielding mode, and the shielding indicator lights up to enter the shielding state.