AEMC® Instruments Model PEL 100 series data loggers store a wide variety of measurement data. When data from a recording session is downloaded to a computer using the DataView® PEL Control Panel, it is stored in an .icp file. Each .icp file includes a folder called Event Log, which you can view by opening the file in the PEL Control Panel and clicking Event Log in the navigation frame. This Application Note explains these messages and what they mean.