Firmware Upgrade - Fnirsi 2C53P Manual

Theme settings： Switch between device yellow/blue themes.
Startup settings： Automatically jump to the corresponding function interface after the device starts up. Selecting
【None】 will jump to the main menu after startup.
The device will automatically shut down if no operation is performed within the set time. Selecting
Auto shutdown：
【OFF】 will disable the auto shutdown function.
USB sharing： Enable USB sharing to access the USB drive when connected to a computer. Screenshots can be found in
the 【Screenshot file】 folder.
About： Displays brand information and current version number.
Factory reset:Restoring to factory settings will reset all previous settings.

5.Firmware Upgrade

In the settings, when connecting to a computer, a USB drive will pop up. Then, place the firmware into the "Upgrade file"
folder on the USB drive, disconnect the USB, shut down, and then restart the device. It will automatically enter the
upgrade page. After the upgrade is completed, the device will automatically shut down.
6.Precautions
●When using both channels simultaneously, the ground clips of the two probes must be connected together. It is strictly
prohibited to connect the ground clips of the two probes to different potentials, especially to different potential ends
of high-power devices or 220V, as this can cause damage to the oscilloscope mainboard by short-circuiting the
internal ground lines of the mainboard, since both channels share a common ground. All oscilloscopes are like this.
●The BNC end of the oscilloscope can tolerate a maximum input of 400V. It is strictly forbidden to input a voltage
exceeding 400V when using the 1X probe switch.