Central to a LI-COR long-term system is the LI-8250 Multiplexer. The LI-8250 acts as a single point of access to interact with and control a LI-COR gas analyzer and up to 36 chambers or flasks.
Design Your SystemAs the access point of communication, the LI-8250 lets you control, monitor, and review measurements from each chamber. When connected with a LI-COR gas analyzer, see live flux calculations and diagnostics at your site. Connect with a third-party analyzer to provide time-synchronization for post-processing of fluxes of other gases.
The LI-8250 includes an embedded Wi-Fi server. This server allows you to connect to the Multiplexer using any Wi-Fi enabled device via browser. Add a cellular modem to receive daily summary files and remotely monitor your system—visit the site only as necessary.
The LI-8250 Multiplexer has 8 ports. Each multiplexer port can connect to either a chamber or an 8250-01 Extension Manifold. You can have a maximum of 4 extension manifolds connected to the LI-8250 Multiplexer.
Each extension manifold also has 8 ports that can connect to chambers. Since the extension manifold uses 1 multiplexer port, each extension manifold gains you up to 7 more chambers.
With 4 extension manifolds, you can have 32 chambers on extension manifold ports and another 4 chambers on the remaining multiplexer ports.
The LI-7825 CO2 Isotope/ NH3 Trace Gas Analyzer can now be added to long-term system using the 8250-02 Calibration Manifold.
See how you can take high-quality CO2 isotope measurements with the Calibration Manifold.
Interested in measuring trace gas evolution in flasks? The 8250-660 Flask Sampling Kit enables you to use your long-term system for flask measurements too.
Read the Application NoteTable 1. Total system power requirements.
Typical Power Consumption (W) | |||
---|---|---|---|
Instrument | Idle | Sampling/ Moving | Max/ Warm-up |
LI-8250 | 4.8 | 15.6 | 18.2 |
8250-01 (each) | 0.8 | 9.2 | 11.0 |
8200-104/C (each) | 0.36 | 4.8 | N/A |
LI-870 | 5.0 | 5.0 | 14.0 |
Note: The max listed for the LI-8250 is a typical maximum, there is no additional warm-up power. Chamber power reaches 4.8 W only when opening or closing, not the entire time of sampling.
Table 2. 8250-660 power requirements.
Typical Power Consumption (W) | |||
---|---|---|---|
Instrument | Idle | Sampling/ Moving | Max/ Warm-up |
9982-079 Thermistor Input Module (each) | 0.12 | 0.12 | N/A |
9982-077 Purge Pump (each) | 5.8 | 5.8 | 7.0 |
Flask Sampling Kit Total (each) | 5.92 | 5.92 | 7.12 |
Note: The power requirements for the 9982-077 Purge Pump are based on the pump being configured to run in the user interface. If the pump is not configured to run, it will use no power.
Specifications subject to change without notice.
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