Das AP200 ist ein komplettes integriertes CO2 und H2O Profilmesssystem. Es misst Kohlendioxid- und Wasserdampfkonzentrationen von bis zu 8 Messstellen, die normalerweise in verschiedenen Höhen an einem Turm angebracht sind, um ein Vertikalprofil zu erhalten. Es wird häufig zusammen mit einem Eddy-Kovarianzsystem verwendet um den Speicheranteil zu bestimmen und ein kompletteres Bild des Gasaustausches zu bekommen.Lesen Sie mehr
|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 10, 8.1, 8, and 7 (Both 32 and 64 bit)
Number of FAQs related to AP200: 53
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The bottles of sieve for drop-in replacement contain the pellets and a membrane on top. The membrane is necessary to keep the pellets contained while allowing gas to pass over the zeolite. The bottle has the same footprint as the old magnesium perchlorate bottles. The amount in each bottle is listed on the bottle. The amount of sieve needed for each analyzer is the following:
The molecular sieve has been demonstrated here by our engineering department to be effective at removing CO2 and H2O from the air sample. The change was made for two reasons:
The molecular sieve is a non-hazardous material that can be shipped to any country.
The automatic zero/span function of the AP200 is designed to do both a zero and a CO2 span. However, it is possible to disable the CO2 span and do only a zero. To do this, set public variable CO2_SPAN_PPM =0.
The spacing depends on the canopy and atmospheric conditions. It is important to know where the concentration gradients are the steepest.
For example, in a low agricultural crop canopy, it may be appropriate to use a logarithmic distribution within and near the top of the canopy, and a linear distribution above the canopy: 0.2 m, 0.4 m, 0.8 m, 1.6 m, 3.2 m (logarithmic) and 5 m, 7 m, 9 m (linear).
The molecular sieve is a direct replacement for the old magnesium perchlorate bottles. The molecular sieve may be used for any Campbell Scientific analyzer that used the old bottles.
Cylinders of zero air and CO2 span gas are needed. Each cylinder must have a pressure regulator. The cost for the two cylinders and two regulators may be approximately $1,000. Typically, there is also a nominal monthly fee to lease the cylinders. Contact Campbell Scientific for more detailed information.
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 intake tubes can be quite long—up to a few hundred meters. Contact Campbell Scientific to ask about specific requirements for an application.