C1.2 User Manual
32
9 Firmware update
9.1 Preparing the USB stick
The firmware of all the CH Precision units can be updated using the USB port located at the back of the unit.
Before starting the firmware update, it is necessary to load a USB stick with files containing the new firmware.
Use a FAT32 formatted USB 2.0 stick (there is one supplied with your C1.2, located in the Accessory Pack). Please
note that some USB sticks might not be detected by the C1.2’s USB port. The following procedure describes how
to load the USB stick with the correct files:
1. Download the latest C1.2 firmware file from www.ch-precision.com.
2. Decompress the .zip folder and copy the decompressed files to the root of your USB stick.
Make sure all the files are present on your USB stick, and that there are no duplicates. It is easiest to delete
older C1.2 firmware files from the stick before loading the new ones, as this saves any possible confusion. Any
missing file will make the firmware update procedure fail, while multiple versions of the same unit’s firmware
can lead to unstable C1.2 behavior after update.
9.2 Updating the unit’s firmware
1. Perform the operations described in section 9.1
2. Connect the USB stick to the USB port located at the back of your C1.2 unit.
3. Navigate to the FACTORY SETTINGS menu and select the UPDATE FIRMWARE item.
4. Start the Firmware Update process by pushing the encoder button. Please note that the unit will
perform a Reset (the display briefly turns off and on) during the procedure.
5. Once the firmware update is complete, the unit automatically goes into Standby mode. Remove the
USB stick and turn the unit on. The new firmware is now active. To verify that the firmware update
is effective, navigate to the FACTORY SETTINGS menu and select the FIRMWARE VERSION item. The
displayed firmware revision should match the firmware revision on the files copied to the USB stick.
Note: The firmware update process lasts 6-15 minutes, do NOT interrupt it!
When performing a firmware update, do NOT press or turn the unit’s front panel button/encoder, do NOT unplug
the unit from the AC wall socket and do NOT turn the mains power switch off. Interruption of the firmware update
procedure may result in corrupted firmware and a malfunctioning unit. If something goes wrong during a firmware
update and the unit is malfunctioning, apply the emergency firmware update procedure described below.
