The AP200 is a complete, integrated CO2 and H2O atmospheric profile system. It measures carbon dioxide (CO2) and water vapour (H2O) concentration from up to eight intakes, which are normally spaced along the height of a tower to give a vertical profile. The AP200 is often used in conjunction with an eddy covariance system to measure the storage term and give a more complete measure of the surface gas exchange.Read More
|Note: Contact a Campbell Scientific applications engineer from the micromet group for questions or updates regarding the datalogger program.|
|Operating Temperature||-30° to +45°C|
|Dimensions||52.1 x 44.5 x 29.7 cm (20.5 x 17.5 x 11.7 in.)|
|Pump Type||Dual-head diaphragm pump with a brushless dc motor|
|Mounting||Mounted in an insulated, temperature-controlled box inside system enclosure|
|Control||Pumping speed is automatically controlled to maintain the pump inlet pressure at the set point|
|Maximum Pumping Speed||9.0 liters per minute (LPM)|
|Pressure Sensor Range||15.0 to 115.0 kPa|
|Heater||8.0 W (turns on/off at 2°C)|
|Warm-up Time||~50 min (from -30° to +2°C)|
|Fan||0.7 W (turns on at 50°C and off at 45°C)|
|Mounting||Mounted inside system enclosure|
|Inlets||Eight air sample inlets plus one inlet for zero, one inlet for CO2 span, and one inlet for H2O span|
|Mass Flow Sensor||0 to 1.0 standard liters per minute (SLPM)|
|Heater||8.0 W (turns on/off at 5°C)|
|Warm-up Time||~20 min (from -30° to +4°C)|
|Fan||0.7 W (turns on at 45°C and off at 43°C)|
|Filter||1.0-in diameter, sintered stainless-steel disk filter, 10-micron pore size|
|Orifice Heater||2 kohm (0.07 W at 12 Vdc)|
|Mixing Volume||750 mL|
|Sample Connection||0.25 in. Swagelok|
|Number of Connections for Heater Cable Entry Seals||3 (1 in, 2 out)|
|Cable Diameter for Heater Cable Entry Seals||2.8 to 6.6 mm (0.11 to 0.26 in.)|
|Wire Diameter for Heater Cable Screw Terminals||26 to 12 AWG|
|Wire Stripping Length for Heater Cable Screw Terminals||5.0 mm (0.2 in.)|
|Screw Tightening Torque for Heater Cable Screw Terminals||0.4 N•m|
|Orifice Inside Diameter||0.178 mm (0.007 in.)|
|Dimensions||31 x 12.5 x 19 cm (12 x 5 x 7.5 in.)|
|Weight||1.4 kg (3.1 lb)|
AP200 CR1000(X) Program.
Compatible with the LI-850.
Note: For those with the LI-840 contact Campbell Scientific for compatible code.
A software utility used to download operating systems and set up Campbell Scientific hardware. Also will update PakBus Graph and the Network Planner if they have been installed previously by another Campbell Scientific software package.
Supported Operating Systems:
Windows 11, 10, 8.1, 8, and 7 (Both 32 and 64 bit)
Number of FAQs related to AP200: 53
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The AP200 supports automatic zero/span from once per day to once each averaging period (typically 30 minutes). A zero/span once a day will mitigate zero/span drift caused by seasonal temperature changes and long-term drift in the IRGA. More frequent zero/span (hourly) will also correct for any small drift associated with 24 hour temperature swings.
Possibly. For example, to measure advection because of a drainage flow on sloping terrain, an AP200 system could be deployed with two towers, upstream and downstream along the slope, with four intakes on each tower.
The AP200 uses ¼ in. tube fittings. Tubing with a 6 mm outer diameter (OD) will not fit, unless a 6 mm to ¼ in. reducer is used on each end of each tube.
The LI-840A uses a heater to maintain its sample cell at +50°C. Therefore, it consumes a lot more power at lower temperatures. Below 0°C, the valve heater also requires some power to keep the valves warm.
The number of intakes required at a site depends on the characteristics of the canopy. For example, the canopy’s height and density directly affect the change in CO2 and H2O concentrations. Order enough intakes to accurately profile these concentration changes. The AP200 may be ordered with anywhere from four to eight intake assemblies.