OPERATION OF VRAE2 - 242.9 DataloggingThis function is not applicable to non-datalog monitor.The VRAE Multi gas monitor calculates and stores the gasreadings based on user-specified datalogging period and thetype of measurement. Two types of gas measurements,average or peak concentration, can be stored for each sensorduring each datalogging interval. The datalogging intervalcan be programmed from one second to 60 minutes in onesecond increment. In addition, time stamp, user ID, site ID,serial number, last calibration date, and alarm limits are alsostored. All data is retained in non-volatile memory so that itcan be downloaded at a later time to a PC.Start/stop datalogThere are four ways to initiate the datalog operation:- automatic: start and stop datalogging automatically whenthe monitor is turned on and off.- manual: start and stop datalogging by pressing a keymanually.- periodic: start and stop datalogging daily based on presettime (hour and minute).- schedule: start and stop datalogging based on preset dateand time (month, date, hour and minute).Program datalog optionMost of the datalogging options can be programmed fromthe monitor. Additional options can be programmed using aPC and down loaded to the monitor (see Section 5 fordetails on how to program various datalogging options).
