INFICON Composer Gas Concentration Controller - Manual (Page 178)

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Composer Operating Manual
8.3.9 Setup Data Log File
This feature is not available in Setup Tool. In the Amplitude Track and the
Sweep modes, the instrument can automatically log data while it is being
displayed. When the Log Data icon is pressed in the Ribbon bar or Menu item
Actions >> Log Data is selected, the Data Log File Setup dialog is opened as
shown in
Figure 8-9 . User can select the drive and directory, and enter a file
name. The complete path is displayed at the bottom of the dialog. The optional
comment header containing information about the process, the date and the
time is attached to the data file. When data logging is turned off, a line
containing the time and a message indicating that logging was terminated is
appended to the file.
The interface provides complete flexibility for choosing which measurement
variables are to be included in the data log. Every entry in the data log contains
time stamp automatically.
The input field Record Interval will accept a value between 1 and 100. When
it is 1 (default value), every measured data point will be recorded in the log file.
For any other value, either data will be averaged over the Record Interval (if
the appropriate field is checked) or those data points will be skipped. This is
particularly useful when logging data over a long period of time. The maximum
rate of logging is about once a second in Amplitude Track mode.
All data is appended to the file. Data is not overwritten if a single data file is
used more than once.
NOTE: The sensors can produce a considerable amount of data (up to
approximately one megabyte per hour per sensor). If the disk drive runs
out of space, the log file will be closed and no more data will be stored.
In order to reduce file size, the user should choose only those variables
which are important at the moment.
Figure 8-9 Data Log File Setup Dialog