### OPC measurement definitions

IONESPMPME ships with a factory default file that defines which measurements are available for the different device types through OLE for Process Control (OPC).

It is possible to edit this file to add new device types and measurements. Changes made to the existing OPC measurement definition file need to be manually copied to the new system.

To check OPC measurement definitions for changes:

1. Navigate to the `...\Schneider Electric\``ION Enterprise` `Power Monitoring Expert\system\IONServices` folder.
2. Open `DefaultMeasurements.xml`.
3. Check the file and then note the changes that you want to recreate on the new system.