OPERATION OF VRAE
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2.9 Datalogging
This function is not applicable to non-datalog monitor.
The VRAE Multi gas monitor calculates and stores the gas
readings based on user-specified datalogging period and the
type of measurement. Two types of gas measurements,
average or peak concentration, can be stored for each sensor
during each datalogging interval. The datalogging interval
can be programmed from one second to 60 minutes in one
second increment. In addition, time stamp, user ID, site ID,
serial number, last calibration date, and alarm limits are also
stored. All data is retained in non-volatile memory so that it
can be downloaded at a later time to a PC.
Start/stop datalog
There are four ways to initiate the datalog operation:
- automatic:
start and stop datalogging automatically when
the monitor is turned on and off.
- manual:
start and stop datalogging by pressing a key
manually.
- periodic:
start and stop datalogging daily based on preset
time (hour and minute).
- schedule:
start and stop datalogging based on preset date
and time (month, date, hour and minute).
Program datalog option
Most of the datalogging options can be programmed from
the monitor. Additional options can be programmed using a
PC and down loaded to the monitor (see Section 5 for
details on how to program various datalogging options).
