Jump to content
Toggle sidebar
Search
Create account
Log in
Personal tools
Dark mode
Create account
Log in
Pages for logged out editors
learn more
Contributions
Talk
Navigation
Main page
Recent changes
Random page
Help about MediaWiki
Tools
What links here
Related changes
Special pages
Page information
Editing
CEGS
(section)
Page
Discussion
English
Read
Edit
Edit source
View history
More
Read
Edit
Edit source
View history
Warning:
You are not logged in. Your IP address will be publicly visible if you make any edits. If you
log in
or
create an account
, your edits will be attributed to your username, along with other benefits.
Anti-spam check. Do
not
fill this in!
== Key Features == Every CEGS by Aeon includes the following features. * Fully automated sample process control * Accepts organic, carbonate, and gas samples * Wide sample mass range ** standard systems: 30 μg to 2.7 mg C ** low-level systems: 5 μg to 2.7 mg C * Online, stepped-temperature combustion is built-in and user-definable ** Recommended step temperature range: 150 to 850 °C ** Up to 1100 °C is possible but lower temperatures prolong furnace element life. * Quantitative sample CO2 capture and purification ** High-vacuum: < 1e-4 Torr ultimate pressure guaranteed, < 2e-5 typical ** Liquid nitrogen trapping and cooling ** Special trace sulfur trapping capability for samples with problematic sulfur content * Precision, calibrated variable temperature coldfinger for cryogenic purification ** temperature range: -180 to +50 °C ** absolute precision: ± 5 °C ** repeatability: < 1 °C ** stability: ± 2.0 °C * Accurate CO2 measurement: ** 2 to 3000 μg C: ± 1 % of reading or 1 μg C ** 0.17 to 250 μmol: ± 1 % of reading or 0.08 μmol * Optimal graphitization conditions ** Precise process gas quantities and pressures for excellent H2:CO2 ratio control ** Accurate, tuned PID furnace temperature control *** absolute temperature precision: ± 10 °C *** repeatability: < 2 °C *** stability: ± 3 °C ** Small graphite reactor volume: ~3 mL ** Graphite reduction completion is automatically checked by residual pressure. * Configurable small sample processing ** Small samples can be graphitized directly, like larger samples, or diluted with 14C-free CO2 to a configurable minimum graphite mass. Dilution may be disabled or enabled automatically based on the amount of carbon in the sample. * Very low process blank levels, typically < 0.002 fM* *: *achievable, i.e., not limited by CEGS; remains dependent on lab practice and AMS performance. ** typical "empty" blank level < 0.2 μg C * Minimal sample cross-contamination, blanks and modern samples can be run back-to-back. * Low manpower requirements: typically less than 5 minutes per sample * Very little inter-sample equipment maintenance (normally zero) * Minimal routine maintenance. * Continuous recording of all important sample, process, and equipment conditions ** Sample combustion, collection and extraction conditions ** Graphitization temperature and pressure profiles * Free Data Visualizer tool graphs logged data in real-time ** Daily archives are available for viewing at any time, even years later * The control system software is fully customizable and comes pre-configured for your CEGS ** Sample processes can be easily defined and updated with the intuitive, built-in point-and-click editor. The delivered initial configuration includes common process sequences appropriate for most sample types. * All code is open source, provided with system, and available on the web * The HACS framework & CEGS application are developed in Microsoft Visual Studio and C# ** HACS is Aeon's open-source Hardware Automation Control System framework
Summary:
Please note that all contributions to Aeon HACS Wiki may be edited, altered, or removed by other contributors. If you do not want your writing to be edited mercilessly, then do not submit it here.
You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource (see
Aeon HACS Wiki:Copyrights
for details).
Do not submit copyrighted work without permission!
Cancel
Editing help
(opens in new window)