Model 545AR Software File Name: M545ARv2r1.SAP Note: This software cannot be updated in the field. Units must be returned to the factory for programming. Version History: Version: 2.1 Release Date: 06-Aug-2024 Description: Displays and sets PL Detect Mode using Auto Null button at power up. Version: 1.0 Release Date: 19-Jan-2024 Description: Initial release.