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Start / Stop Data Log Button
The Analyzer automatically records all data collected on the instrument and
saves it for later analysis. These files are called Data.dat files, which are
described below in the section called "File Management". In addition, the user
can record a separate data log file. Press this button if you would like the
instrument to start recording a separate data file. A dialog box will appear
prompting you for a filename and location. Press this button again to stop
recording the data file.
Data Log Filename and Path
The filename and path of the active data log is displayed in this pane. The
indicator is grayed-out if there is no active data log (i.e., if a new data log has not
been started using the Start /Stop New Data Log Button). A new file will be
generated at midnight, which will be saved to the same location as the original
log file.
Data Window
The data window displays a graph of any stream of data vs. system time, with a
format of hh:mm:ss. The user can select which data stream are displayed using
combinations from the Data Source and Data Key pull down menus. The
precision displayed can be adjusted using the "Precision" menu and Auto-scaling
of the 'Y' axis is also also available.
Instrument Status
If these parameters are enabled through the 'Show Instrument Status' entry in
the 'View' Menu on the main toolbar digital readouts for Warm Box temperature,
Cavity Temperature and Cavity Pressure are displayed to the left of the main
trend graphs.
Data Source and Data Key Pull Down Menus
These two menus enable selection of the data stream that is viewed in the data
window. Data streams available on the GUI are gas concentrations, if 'instrument
Analysis' (where instrument represents the system installed) is selected, or if
"sensors" is selected, the analyzer's optical cavity pressure or temperature can
be viewed as well as the nominal ambient temperature of the analyzer ("DAS
Picarro G2302 Analyzer User's Guide
Rev. B 1/14/11
22
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