Campbell Scientific PC400 Datalogger Support Software - Manual (Page 64)

Section 5. Split
Split will not start reading if the exact specified starting time
cannot be found, unless you enable the “Start-Stop
On/After Time” feature. The interval (5 minutes, 60
minutes, and 5 seconds in the examples above) must be
evenly divisible into 60 minutes. CAUTION
• If the start time is a certain number of days prior to the PC
time, the file will be processed beginning at midnight of the day
specified. NOTE
• To specify a start time in minutes from the current PC time,
you must also specify a day parameter of [-0]. Otherwise,
processing will begin at the first instance in the data file that the
minutes parameter equals the current minutes.
5.3.1.4
5.3.1.4.1
Stop Condition
The Stop Condition specifies when to stop processing data. This feature allows
segments of data to be removed from large data files. For instance, if a data
file contains one month of data and just one day is desired, the start and stop
values allow the user to get just that day’s data.
The Stop Condition is expressed with the same syntax as the Start Condition.
If the Stop Condition parameter is left blank, Split will execute until the end of
the file. As with the Start Condition, logical “and” and “or” statements can be
used when specifying the Stop Condition (Section 5.3.1.3, Start Condition), as
well as stopping based on PC time.
The array or record containing the Stop Condition is not included in the output
file. If the stop value is not found, Split will display a dialog box that gives the
option to select a new file and continue processing the data. This feature is
useful when data are contained in more than one data file.
The “Start-Stop On/After Time” function can be used with a Stop Condition.
This will stop processing of the file when the exact time is found or at the first
instance of data after that time has occurred. This option is found on the
Output tab, Other button.
The C and F commands alter the meaning of the Stop Condition.
“C” Option: Formatting Event Tests Containing Conditional Output Arrays
The C option is used to combine data from two or more conditional arrays onto
one Split output line. A conditional array is one that is only output when a
defined event occurs.
Assume that two or more conditional Output Arrays with unique Output Array
IDs compose a test period, followed by an unconditional Output Array that
defines the end of a test. The unconditional “end of test” Output Array is at the
end of each test, but the conditional Output Arrays may or may not be present.
The data file is comprised of several of these tests.
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