The PM850 continuously resets every few hours.
Series 800 Power Meter PM850
This is an issue with 10.200 firmware.
Upgrade to the latest firmware.
Access to firmware upgrade instructions, including a how-to video and a link to the latest firmware can be found at:
If only the firmware is required, it can be downloaded directly from:
1) Using a internet browser navigate to www.schneider-electric.com
2) select Support, then Download Center from the Green menu bar
3) type "PM800 Series V12.500 Firmware" into the search bar and click on the Search button
4) click on the "PM800 Series V12.500 Firmware" link presented in the search results
5) click on the Download button to start the download and save the file
Note: Also by entering only PM800 and/or keyword search criteria into the search bar, you be find wide variety of PM800 related documents.