UltraRAE 3000 User’s Guide5. Press [Y/+] to initiate calibration.Note: You may press [MODE] if you decide that you do notwant to initiate calibration. This will take you directly to theCalibration menu for Zero calibration.6. Span calibration starts a 30-second countdown and displaysthis message:Calibrating...During the Span calibration process, the instrument performs theSpan calibration automatically and does not require any action onyour part.Note: If you want to abort the Span calibration process, press [N/-] atany time during the process. You will see a confirmation message thatsays “Span is aborted!” and then the Zero calibration menu willappear. You can then proceed to perform a Zero calibration, performa Span calibration, or exit to the topmost Calibration menu.When Span calibration is complete, you will see a message similar tothis (the value shown here is for example only):Span 2 is done!Reading = 1000 ppmThe instrument then exits Span calibration and shows the Zerocalibration menu on its display.Note: The reading should be very close to the span gas value.20.2 Exiting Three-Point CalibrationWhen you are done performing calibrations, press [MODE], whichcorresponds with “Back” on the display. You will see the followingmessage:Updating settings…59
