DH Instruments FPG8601, Руководство по эксплуатации и обслуживанию

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9. DATA FILES
Page 133 © 2007 DH Instruments, a Fluke Company
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9.1 OVERVIEW
Data files are the files created by FPG Tools to store data related to a test run, internal calibrations, tares,
and program errors. Each data file has a specific file extension and in some cases a specific file name to
denote the function of the file. With the exception of test data files, all data files must be stored in the root
directory of FPG Tools. Test data files may reside in any selectable directory.
All files are designed to be easily exported into MS Excel or any other third party spreadsheet application.
These tools are useful for plotting and reporting information specific to the data file. FPG Tools
has
limited plotting ability that can be used with “*.dat” files only (see Section 6.3.4).
9.2 POINT LOG DATA FILE (*.DAT)
*.dat files are generated when
[Run w/Point Log]
or
[Run Test Sequence]
(see Section 6.5)
is selected. These files store current setup information as well as all data points logged by the user or a
test sequence. The files are semi-colon delimited for easy import into other reporting and
analysis applications. A separate file is created for each active DUT.
9.2.1 NAMING AND STORING DATA FILES
FPG Tools generates a default file name and location, however any file name and location
can be selected. The default directory for “data” files is specified by the root, major and minor
directory selections on the
<Data File>
tab of the system setup (see Section 6.6.2.3) when a
DUT is active. When a DUT is not active, the default directory is the root directory selection.
The default *.dat file name follows the format
yyddd_aa.dat
where:
yy
Is the two digit year (e.g. 2000 is represented by 00).
ddd
Represents the Julian day. The value is the day of the year relative to the 365 day
calendar (e.g., January 12 is represented by 012).
aa
Represents the data file run number. This indicator increments from 01 to 99
allowing up to 99 tests to be run using the same base data file name.
9.2.2 FILE FORMAT
*.dat data files contain a header section and a data section. The header section of the file
stores information setup at the beginning of a test sequence or test point log. The data
section contains averaged or instantaneous data logged for each test point in the same order
as on the
<Logged Data>
Run screen (see Section 6.3.5).
In some circumstances, the header section can change. Particularly, if
[Run w/Point Log]
is
selected a user has the option to take points at will as well as change setup information and
other specific settings (see Section 6.5.3). Keep this in mind when viewing the header section.
9.3 INTERNAL CALIBRATION LOG FILE
The internal calibration log file is named
"intcal.log"
and stored in the root directory of FPG Tools.
This file contains a complete history of every internal calibration that was activated as well as calibrations
that were logged only (see Section 5.3.2). All data displayed on the
<Internal Calibration Results>
form
is stored in this file. The first line of the file is a list of column headings. Each subsequent line contains
data specific to an internal calibration.