OPERATION
2-5
WARNING!
The QRAE Plus, portable gas detector has been designed for the
detection of oxygen deficiencies, flammable gas, and toxic vapor
levels. An alarm condition indicating the presence of one or
more of these potentially life-threatening hazards should be
taken very seriously.
In the event of an alarm condition it is important to follow
established procedures. The safest course of action is to
immediately leave the affected area, and return only after further
testing together with other appropriate safety procedures to
determine that the area is once again safe for entry.
2.4. Datalogging
This function applies only to datalogging monitors.
The Q-RAE Plus multi-gas monitor calculates and stores the
gas readings based on a user-specified datalogging period and
the type of measurement. Both average and peak values can
be stored for each sensor during each datalogging interval. The
datalogging interval can be programmed from one second to 60
minutes. In addition, time stamp, user ID, site ID, serial
number, last calibration date, and alarm limits are also stored.
All data are retained in non-volatile memory for later download
to a PC. There are four options to start/stop datalog operation:
•
Automatic:
start and stop datalogging automatically when
the monitor is turned on or off.
•
Manual:
start and stop datalogging in user mode manually.
•
Periodic:
start and stop datalogging daily, based on preset
start and stop time (hour and minute).
•
Scheduled:
start and stop datalogging one time at a preset
start and stop date and time.
If manual datalog mode has been selected, start and stop
datalogging using the keystrokes in Table 4. The other three
datalog options will start and stop automatically without any
user intervention.
