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.
Please note that some USB sticks might not be detected by the P1 USB port. CH Precision recommends the use of Sandisk USB 2.0
sticks.
The following procedure describes how to load the USB stick with the correct files:
1. Download the latest P1 firmware file from www.ch-precision.com
2. Decompress the .zip file and copy the decompressed files to the root of your USB stick. After doing so, your USB stick
should contain the following files:
P1_xxx.ds1
P1_xxx.mc1
P1_xxx.oP1
where 'xxx' indicates the firmware revision.
Make sure all three files are present at the root of your USB stick. Any missing file will make the firmware update procedure fail.
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 P1 unit
3. Navigate to the FACTORY_SETTINGS menu (see section 6) and select the UPDATE_FIRMWARE item
4. Start the Firmware Update process by pushing the OK (R) 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. 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 several minutes, do NOT interrupt it!
When performing a firmware update, do NOT press any of the unit's front panel push-buttons, 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 non functioning unit. In case something went wrong during a firmware update and the unit malfunctioning, apply
the emergency firmware update procedure described in the next section.
9.3 Emergency firmware update procedure
Perform the following Emergency Firmware Update procedure if your unit does not power up normally.
1. Perform the operations described in section 9.1
2. Turn the unit off (back panel power switch to OFF)
32 P1 User Manual Rev 1.1
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