YSI 6000UPG - Manual (Page 79)

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Select this option to compensate a data file for long term sensor drift. This compensation procedure
is also commonly called Post-Calibration.
Example: Dissolved oxygen data can be collected periodically throughout a long term deployment
using a separate, freshly calibrated DO meter. This independent data can then be used to
compensate the 6000
UPG data for the small sensor drift which normally occurs over time.
NOTE: The setup menu options for date format, date separator, time separator, and radix separator,
all apply here. The date, time, and value are separated from each other by spaces. Lines which do
not match the above format are ignored.
To create a compensation file, use a word processing program or follow the procedure below. The
file must be simple ASCII. In WordPerfect you use the DOS Text Out feature. In Word, save as
file type Text Only (*.TXT). From DOS, proceed as follows:
1. Issue the DOS command "COPY CON DO.CMP".
2. Type all the lines in your file (make sure each line is correct before you press Enter for that
line).
An example line would look like this:
12/31/92 23:59:59 100
3. After the last line has been typed and entered, hold Ctrl and press Z, then press Enter.
4. The message 1 File(s) copied will be displayed.
NOTE: If only one data point is entered into the compensation file, all data after that date and time
will be corrected. If more than one data point is included in the compensation file, data between
points will be corrected linearly.
To enter the compensation filename, press TAB while the highlight cursor is on compensate. The
highlight cursor will move to the right. Enter the path and file name.
Example: C:\DO.CMP Enter.
When you enter a compensation filename, the program performs a test load of that compensation
file. A summary is displayed so you can verify the file structure. The summary includes how many
lines were accepted, rejected, or blank; the total number of lines, and the earliest and latest date.
If you compensate a constant used in calculating one parameter, you must also compensate the same
constant if you use it to calculate other parameters. A total of 1000 compensation points is allowed
for any single report or plot.
Compensate: