Issue
Does the firmware in the CM4 require upgrading prior to installing the transient module (CVMT)?

Product Line
CM4xxx

Environment
CM4xxx with Current/Voltage Module Transient (CVMT) module

Cause
Firmware V12.04 (or greater) is required to recognize the CVMT module.
Older meters that are being upgraded to a 4T may have a problem since they could have firmware previous to V12.04.

Resolution
It is recommended to update the firmware (>= 12.04) prior to changing the module out to make sure there are no issues.

Access to firmware upgrade instructions, including a how-to video and a link to the latest firmware can
be found at: FA237920

Additionally, supporting documents and file downloads on this and a wide variety of other products and topics may be
obtained using the search function found at the: Download Center