ppbRAE 3000 User’s Guide34BacklightThe LCD display is equipped with an LED backlight to assist inreading the display under poor lighting conditions.DataloggingDuring datalogging, the instrument displays a disk icon to indicatethat datalogging is enabled. The instrument stores the measured gasconcentration at the end of every sample period (when data logging isenabled). In addition, the following information is stored: user ID,site ID, serial number, last calibration date, and alarm limits. All dataare retained (even after the unit is turned off) in non-volatile memoryso that it can be down- loaded at a later time to a PC.Datalogging eventWhen Datalogging is enabled, measurement readings are being saved.These data are stored in “groups” or “events.” A new event is createdand stored each time the instrument is turned on and is set toautomatic datalogging, or a configuration parameter is changed, ordatalogging is interrupted. The maximum time for one event is 24hours or 28,800 points. If an event exceeds 24 hours, a new event isautomatically created. Information, such as start time, user ID, siteID, gas name, serial number, last calibration date, and alarm limits arerecorded.Datalogging sampleAfter an event is recorded, the unit records a shorter form of the data.When transferred to a PC running ProRAE Studio, this data isarranged with a sample number, time, date, gas concentration, andother related information.
