Data Logging
AutoProgram Descriptions
9-28
Using the LI-6400
9
4
Stability (total CV%)
During the maximum wait time period, if the stability parameter TotalCV%
falls below this value, log.
5
Match before each log (Y/N)?
OPEN version 3.01 and below will prompt:
Match before each obs (Y/N)?
With OPEN 3.2, this changed to
Match if |ÆCO2| <
which allows you to enter a CO
2
differential threshold that will cause match-
ing to occur if the absolute value of the sample - reference IRGA is smaller.
If you wanted to match on every observation, enter a large number (100,
1000, etc.). If you never want to match, enter 0. Typically, you might want to
use 15 or 20 µmol mol
-1
as the threshold.
If matching occurs (for either software version), it occurs immediately after
the minimum wait time. Following automatic matching (which typically
takes about 30 seconds), there will be a short delay (10 seconds), then the
maximum wait time and stability checking is entered. Thus, automatic match-
ing tends to increase the total time between logging events by about 40 sec-
onds.
While
LightCurve
is running, the ÒProgramÓ field will show time in two
ÒPrecision AutoLogÓ
A new AutoProgram has been added to OPEN 3.3. This program is useful
when data needs to be logged at precise intervals of greater than or equal to 1
second. (For faster data collection, use the program
Buffered AutoLog
.).
When run, the program will prompt for two things:
Log interval (secs)=
Enter the desired logging interval in seconds (such as 1.5, 4.0, etc.).
Quit after (minutes)=
Enter the period of time you wish logging to occur, in minutes. For example,
if you enter a 7.3 second logging interval, and a period of 5 minutes, 41 ob-
servations will be logged, each 7.3 seconds apart. In addition, while the pro-
Summary of Contents for LI-6400
Page 1: ...Using the LI 6400 Portable Photosynthesis System ...
Page 15: ...Part I The Basics ...
Page 16: ......
Page 174: ...Making Measurements Answers to Questions 4 56 Using the LI 6400 4 ...
Page 175: ...Part II Useful Details ...
Page 176: ......
Page 200: ...Standard Tools Power ON Hooks 5 24 Using the LI 6400 5 ...
Page 214: ...Real Time Data Real Time Graphics 6 14 Using the LI 6400 6 ...
Page 234: ...Environmental Control Light Control 7 20 Using the LI 6400 7 ...
Page 244: ...Light Sensor Considerations Gallium Arsenide Phosphide GaAsP Sensor 8 10 Using the LI 6400 8 ...
Page 288: ...Data Logging Making Your Own AutoPrograms 9 44 Using the LI 6400 9 ...
Page 289: ...Part III Working With Files ...
Page 290: ......
Page 312: ...The LPL File System Troubleshooting 10 22 Using the LI 6400 10 ...
Page 340: ...Downloading Files Using a Data Capture Program 11 28 Using the LI 6400 11 ...
Page 375: ...Part IV Configuration Issues ...
Page 376: ......
Page 420: ...Defining User Variables Old Style vs New Style 15 18 Using the LI 6400 15 ...
Page 454: ...Using an Energy Balance Further Reading 17 12 Using the LI 6400 17 ...
Page 455: ...Part V Maintenance Troubleshooting ...
Page 456: ......
Page 572: ...Troubleshooting Useful Information 20 46 Using the LI 6400 20 ...
Page 593: ...Part VI Programming ...
Page 594: ......
Page 622: ...Programming with LPL Compiler Directives 22 28 Using the LI 6400 22 ...
Page 846: ...Index I 16 Using the LI 6400 ...