LPL Topics
Analog Measurements
Using the LI-6400
23-69
¥
The address
of the internal A/D structure (from a prior
AIOPEN
).
¥
The group being defined
Referred to by number (0É4).
¥
The time interval.
That is, how often (seconds) new readings should be ready for this group.
¥
How many sub-samples should be made in this time interval
For example, make 10 measurements every 1 second.
¥
Averaging information.
How many subsamples should be averaged together for the final reading? If
you want a 5 second running average and are making 10 readings each sec-
ond, then use 50 for this.
¥
The queue size.
How many sets of final readings for this group should the operating system
buffer for you. 0 means no buffering.
LetÕs focus for the moment on the third parameter, the time interval. Each
group has some time interval at which new readings will be ready. However,
just because readings are available doesnÕt mean that they automatically go
anywhere - they donÕt. They are buffered until you say you want them, which
is done via
How do you know readings are ready for you to get them? There are two
ways: The function
tells how many readings are available for any
group. A more elegant approach, however, rather than sitting around in a tight
loop testing
on page 23-33) allows you to specify a function to call whenever
readings become available.
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 ...