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USER MANUAL | ICOS | INSTRUCTIONS | UM/ICOS-EN REV. B.2
File Transfer Menu
Use the File Transfer menu to access data collected by the analyzer.
Each time the analyzer is re-started, the most recent file name is displayed.
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Example: mcia_2021-02-20_f0001.txt, where the:
First characters represent the analyzer model (mcia)
o
Next 10 characters represent the date (yyyy-mm-dd)
o
Last four numbers are a serial number.
o
The serial number counts upward to provide up to 10,000 unique file names each
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day.
If the analyzer is left in continuous operation, a new data file will automatically be
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created every 24 hours to keep data file sizes manageable.
Standard Data File
Data files are written in text (ASCII) format and contain labeled columns displaying:
The time stamp of each recorded measurement
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Gas/Water Vapor concentration
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Del values
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Cell pressure (Torr)
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Cell temperature (Celsius)
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Ambient Temperature (Celsius)
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Ring-Down Time (microseconds)
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The format can be changed in the Time/Files menu of the Setup panel. (Figure 36)
Figure 29 shows a typical data file.
For each measurement there is an adjacent column reporting the standard deviation of the
measurement (with sd suffix).
The standard deviation is zero when the analyzer is running at 1 Hz, as no averaging
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of data has taken place.
At speeds slower than 1 Hz, the standard error of the average is reported.
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At the end of each data file are encoded listings of settings used by the analyzer for
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that data file. Settings are typically stored for diagnostic or troubleshooting
purposes.
Figure 29: The Beginning of a Typical Data File
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