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ABB GLA131 Series Microportable Analyzers
User Manual
ABB PROPRIETARY INFORMATION
41
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
in the form: mgga_2022-12-29_f0001.txt, where the:
o
First set of characters represent the analyzer model (mgga).
o
Next set of characters represent the date (yyyy-mm-dd).
o
Last set of characters are a serial number.
The serial number counts upward to provide up to 10,000 unique file names
each day.
If the analyzer is left in continuous operation, a new data file is
automatically 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:
Timestamp of each recorded measurement
Gas concentration
Cell pressure (Torr)
Cell temperature (Celsius)
Ambient temperature (Celsius)
Ringdown time (microseconds)
The format can be changed in the
Time/Files
menu of the
Setup
Figure 34 shows a typical data file.
Figure 34: Beginning of a Typical Data File for a GLA131-GGA
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, because
no averaging of data has occurred.
At speeds slower than 1 Hz, the standard error of the average is reported.