It’s not every researcher that wears a hard hat and works around dynamite. But Dr. Holly Dolliver of the University of Wisconsin—River Falls embraces the unique parts of studying soil at a frac sand mining site. Wisconsin law requires that land used for mining must be reclaimed, so Dr. Dolliver is part of a five-year research program to see how soils react to being stripped, stockpiled, and respread. “Our emphasis is to understand holistically how the soil responds to disturbance,…
Wireless communication is an excellent way to use the LI-8100A Automated Soil Gas Flux System in the field to start and stop logging, and view the data in real time. For wireless communication, the system has always relied on a peer-to-peer connection using a Cisco wireless card inserted into one of the PC card slots in the LI-8100A Analyzer Control Unit. Apple iOS devices, like the Windows Mobile and PALM devices before them, were able to easily connect using peer-to-peer networking.
Many LI-COR gas analyzers feature RS-232 communication ports, and sometimes these are the only communication channels available between the gas analyzer and a computer. Many new computers don’t have built-in serial ports, so USB-to-serial adapters are needed to facilitate this communication process. Communication problems between gas analyzer and windows interface software can happen due to issues with the USB to serial adapter or due to the lack of compatibility between the instrument firmware version and the windows interface software version. Terminal…
Have you ever found yourself wishing that a fiction writer had a better grasp of scientific concepts? Dr. David Bowne at Elizabethtown College in Pennsylvania is doing his part to solve this problem—one student at a time—with a class called Ecology in Short Fiction. By providing literature students with experience with the LI-8100 Automated Soil CO2 Flux System, Dr. Bowne and his co-teacher Dr. Matt Skillen make ecological concepts meaningful to students in the context of fiction literature.
There are four common causes for bad readings on LI-8xxx instruments:
- Incorrect zero and span calibration parameters.
- IR light source that is failing or has failed.
- Contamination (dirt, corrosion, liquids) in the optical path.
- Failed detector.
1) Incorrect zero and span calibration parameters:
Check these values using the LI-COR interface software for each instrument by going to:
For LI-820 and LI-840, LI-840A: View – Calibration – Advanced
For the LI-8100, LI-8100A: Utilities…