Rae QRAE 3 User Manual

Also see for QRAE 3: Quick start guide

Rae QRAE 3 User Manual Manual pdf 27 page image

24When the Man Down feature is on and there is no gas alarm, the QRAE 3 senses that it is motionless for theamount of time set in the “Motionless Time” parameter. If the instrument is not moved during that time, thena pre-alarm is activated to alert the user, and shows the “Are You OK?” screen. Pressing [Y/+] clears thealarm and returns the QRAE 3 to its normal operation. Pressing [MODE] sets it into Man Down Alarm (andif wireless connectivity is enabled, a Man Down message is sent in real time to remote observers). If neitherkey is pressed, then after the countdown, it goes into Man Down Alarm (again sending a message to remoteobservers if wirelessly enabled).Settings are available for: Off/On Motionless Time (time the instrument is motionless before initiating a pre-alarm) Sensitivity (set to low, medium, or high to compensate for ambient vibration or motion) Warning Time (countdown, in seconds, from pre-alarm to Man Down alarm)When the Man Down alarm is activated, the buzzer sounds and LEDs flash continuously, and a countdownbegins. If the QRAE 3’s user presses [Y/+] for “Yes” in response to the “Are You OK?” question onthe screen before the countdown reaches zero, the Man Down alarm stops and the main readingscreen is displayed. If the person does not press [Y/+] for “Yes” in response to the “Are You OK?” question on thescreen before the countdown reaches zero, the Man Down alarm is sounded and LEDs flashcontinuously. If the person presses [MODE] during the countdown, answering the “Are You OK?” questionwith “No,” the Man Down alarm starts.If wireless connectivity is enabled, and the QRAE 3 is connected to a network, a Man Down message isalso sent to remote observers.8.3.4. DatalogThe instrument displays a floppy disk icon to indicate that a datalog is being recorded. Theinstrument stores the measured gas concentration for each sensor, date and time for eachmeasurement, Site ID, User ID, and other parameters. The QRAE 3 memory is sufficient torecord three months’ worth of data for four sensors at one-minute intervals. All data are retained(even after the unit is turned off) in non-volatile memory so that they can be downloaded at a latertime to a PC.8.3.4.1. Clear DatalogThis operation erases all data stored in the datalog.Note: Once the datalog is cleared, the data cannot be recovered.