27Note: Advance through the alphabet and numbers (0 through 9) by one with each press of the[Y/+] key. To scroll quickly, hold down the [Y/+] key for as long as you want it to scroll rapidly.Save your changes by highlighting “OK” and pressing [Y/+].8.3.5.6. User ModeTwo User Modes are available: Advanced and Basic. The Advanced User Mode allows a greaternumber of parameters to be changed than Basic User Mode. No password is required to enter theProgramming Menu when in Advanced User Mode.8.3.5.7. Zero At StartIf your QRAE 3 has been configured to perform a zero (fresh air) calibration upon startup, calledZero At Start, then the startup routine is interrupted so that you can perform a fresh aircalibration.Press [Y/+] to start zero calibration when prompted. If you do not want to perform a zerocalibration, press [MODE] to bypass it. If you start a zero calibration and want to abort it, press[MODE], and the calibration stops and the main display is shown.8.3.6. WirelessWhen a QRAE 3 is equipped with a wireless modem, its settings are controlled via the menuitems under “Wireless.”8.3.6.1. Radio On/OffTurn the radio on or off via this menu.1. Choose between “On” and “Off” by pressing [MODE].2. Select the highlighted state by pressing [Y/+].3. Press [MODE] until Exit is selected.to register the change. Press [Y/+] to save the change. You see the message “Turning On Radio. PleaseWait.” or (if you are turning off the radio) it simply advances to the Wireless menuscreen.8.3.6.2. RoamingThe Roaming function provides continuous wireless connectivity between zones enabling usersof wireless monitors to travel from one zone/work area to another without losing communicationbetween their monitor and ProRAE Guardian. You can turn Roaming on and off in your monitor,or you can set it via ProRAE Studio II.1. In the Wireless menu, press [MODE] to scroll down to “Roaming.”2. Press [Y/+] to select “Roaming.”3. Press [MODE] to scroll to “On” or “Off.”4. Press [MODE] to scroll to “Exit.”5. Press [Y/+] to exit.Note: When Roaming is on, you cannot change the instrument’s PAN ID. In addition, whenRoaming is on, the “PAN ID” is not shown in the Wireless menu. To turn “PAN ID”back on:1. In the Wireless menu, press [N/-] to scroll down to “Roaming.”2. Press [Y/+] to select “Roaming.”