ToxiRAE Pro User’s Guide1612. Operating The ToxiRAE Pro12.1. OverviewThe ToxiRAE Pro has two operational modes:• Normal — see page 16 for detailed instructions.• Diagnostic — see page 48 for detailed instructions.The following is an overview of the two modes:Normal Mode is the default mode. It is accessed when you turn on the ToxiRAE Pro.Two sub-modes are available: Basic User and Advanced User. In Basic User, somerestrictions are applied, including password protection that guards against enteringProgramming Mode by unauthorized personnel. In Advanced, there are no such accessrestrictions (you do not need a password), and it provides the indications and data youneed most for typical monitoring applications.Diagnostic Mode is primarily intended for technicians to use during troubleshooting, although italso offers access to a few changeable parameters that you may rarely (if ever) need to change. Apassword is required to enter Diagnostic Mode (the password is the same as (andautomatically kept in sync with) the one used to enter Programming Mode). The defaultpassword is 0000. To enter Diagnostic Mode, power the instrument off and then turn itback on by pressing and holding both the buttons. In Diagnostic Mode, ToxiRAE Prodisplays readings in raw counts instead of units such as parts per million (ppm).It is not possible to switch to Programming from Diagnostic Mode without turning off theinstrument first and then restarting it in the desired mode.12.1.1. Normal ModeNormal Mode is the default mode of the ToxiRAE Pro when it is turned on. The selectedsub-mode (Basic or Advanced) determines the number of screens that are accessible.