ACE
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ACE - The next-generation automatic long term unattended Soil CO2 Flux system. World Class Design and Precision 40+ Years experience measuring CO2 U.S. warranty and service center Each station has its own IRGA integrated into the measuring chamber for more reliable measurement. IRGA drift is zeroed out on every station, and after each individual measurement assay, with CO2 free air Truly Wind Proof! Each station can be put miles apart from other stations, or they can be multiplexed together. Up to 30 individual stations may be multiplexed together for improved measuring accuracy. You can start with one station, and build a multiple station system over time, as funding allows. Open System with pressure equalization valve Closed System Ideal for high wind environments Transparent Open System with pressure equalization valve The ACE Multiplexed System Stations may be 200m apart.

Innovative IRGA (infrared gas analyser) design Advantages of having the IRGA next to the sampling chamber: 1. Gas hang up is eliminated as a problem. 2. Water vapor drop out is eliminated as a problem. 3. Energy consumption by individual measuring stations, and integrated multiplexed systems is reduced dramatically. 4. Improvement in measuring response times. 5. Since each separate unit contains an IRGA. Each station can be placed miles apart from other stations. Even when the units are multiplexed together, they may be up to 200 meters apart. The IRGA measuring chamber is located next to...

More options reduce measuring error Open Systems & Closed systems Closed systems, by definition, are closed without a vent. Before the chamber closes and seals, air flows through the chamber. This purges any non-ambient CO2 levels from the chamber before measurement. Closed systems take a CO2 measurement of ambient air after the soil sample chamber is sealed. This becomes the CO2 reference. The system continues to take measurements every ten seconds. The researcher may select the Pedersen (2001) algorithm, linear regression, or exponential regression for determination of NCER or Net CO2...

Paying attention to details Individual units and multiplexed systems are easy to set up and program The ACE Station is easy to set up and program. As the system is fully integrated, there is no gas tubing or complex gas circuits to set up and connect between an analyzer and a separate soil chamber. The control console features a large display screen. Full programming is achieved using just 5 keys that drive a series of easy to use menus. Gas exchange data, soil flux calculations and other sensor measurements are all displayed and recorded by the ACE Station. 1 Gigabyte Compact Flash cards...

Paying attention to details Optimized sampling area clearance The ACE is designed to minimize their effects on the parameters that are being measured. Since light, heat, and moisture all affect soil respiration, the system that disturbs natural conditions the least offers a better design. The ACE system sampling chamber moves completely away from the sampling area in between measurements, allowing more natural light, heat, and moisture to occur. Furthermore, the entire instrument may be mounted at soil level or inches above soil level, mounted on the soil collar and mounting stakes with...

ACE Network Although an ACE Station can function fully independently for single location measurements, it may also be configured for use with multiple stations in a Network. Up to 30 ACE Stations can be connected together in an ACE Network via an ACE Master control unit. This Master control will supply power to and collect data from all stations and control all stations within the experiment. Connections between the ACE Master control unit and each ACE Station are made by simple electrical cables only.. As each ACE Station is a fully functional on its own with an integral CO2 IRGA, it is...

ACE Master Control Unit - for programing and control of multiple units as well as data management The ACE Master control unit is a small, waterproof, steel enclosure that features a graphic display, Two Compact Flash card ports, 30 ACE Station docking ports and 2 battery ports. Full programming and control is achieved using just 5 keys that drive a series of easy to use menus. The ACE Master control unit monitors all Stations within the experimental network and flags any problems encountered. The Master control unit graphic display may be used to review and plot experiments in the field....

Power The Ace system uses minimal power by design. Because air is only pumped very short distances and not through long tubes connected to a central multiplexer, power requirements are substantially lower. A single unit will run for approximately 28 days with a 12 volt 40 Ah car battery. Two Batteries may be connected to the Master control unit to run the whole system. Alternative methods include 24 volt batteries, or alternating current with the proper power converter, solar, or wind power. Contact us for references Prove it to your self.

Technical specifications Measurement of CO2 Standard Range: 0 - 40.0mmols m-3 or - (0-896ppm at standard temperature and pressure), 1ppm resolution (0.05mmols m-3) noise level 1-2 ppm Infrared gas analyzer housed directly adjacent to the soil chamber. Measurements are made every ten seconds. Measuring methods Either open or closed mode systems are available Closed stations report NCER or Net CO2 Exchange Rate determined by linear regression analysis, the Pedersen (2001) algorithm, or exponential regression analysis . Methods should be chosen at time of purchase. Individual assay...

ACE Master Control Unit Technical Specifications Steel electrically sealed enclosure Either 10, 20, or 30 ACE station docking port versions, 2 battery ports, two Data card ports and an RS232 port.