Campbell Scientific ID-2000W Software - Manual (Page 64)

SECTION 6. IMPORT/EXPORT
6-10
NOTE 4:
ID-2000 allows you to plot parameters versus “reference” time instead of standard time in order
to synchronize multiple data files about a common data event. The reference time value in the
file header is the time (in seconds from the beginning of the data) for the point that you wish to
use as a reference data point. Initially this point should be set as 0.0 which refers to the
beginning of the data file. However, the user may modify the reference time point which updates
this variable in the file header.
This ends the header section of the file. What comes next in the file is actual parameter data values. If
time data is included in the file it is placed immediately after the header. If time is being calculated by
using the scanrate information then the data values for the first parameter is placed immediately after
the header. Following the last data point of the first parameter is the first data point of the second
parameter. All values of a parameter are included sequentially followed by all the values of the next
parameter and so on.
ID-2000 has the capability of adding calculated parameters to a data file. All calculated parameter values
are appended to the end of the original data in the file. The parameter information is included in the
CHAN structure array located in the header. Calculated parameters are placed in the data file like the
data for other parameters except that it begins with a 181 character null terminated string that contains
the equation used to create the calculated parameter. Immediately following this string starts the
calculated parameter data values.