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Product Name: AP200 CO2/H2O Atmospheric Profile System
上市Date:2018-05-04

The AP200 is a complete, integrated CO2 and H2O atmospheric profile system. It measures carbon dioxide (CO2) and water vapor (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.

The AP200 is a complete, integrated CO2 and H2O atmospheric profile system. It measures carbon dioxide (CO2) and water vapor (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.

Benefits and Features

  • Fully integrated system

  • Requires only 13 W (average at 25°C and 12 Vdc)

  • Contains a Campbell Scientific CR1000 Measurement and Control Datalogger

  • Automated zero and span

  • Automated temperature and pressure control

  • Datalogger program included

 

Technical Description

Measurements

Primary:

  • CO2 concentration at each intake

  • H2O concentration at each intake

  • System diagnostic word

Secondary:

  • Sample flow rate

  • Sample cell pressure

  • Sample cell temperature

  • Other control variables 

AP200 Specifications

System Enclosure

  • 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.)

  • Weight
    AP200 base model: 15.9 kg (35 lb)
    LI-840A: 1 kg (2.3 lb)
    CR1000KD: 0.3 kg (0.7 lb)
    CFM100/NL115: 0.2 kg (0.4 lb)

  • Power Requirement:
    Voltage: 10 to 16 Vdc
    Average Power (at 25°C)1: 13 W
    Maximum Power (cold startup): 
    3.75 A (45 W)

Pump Module

  • 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)

Valve Manifold

  • 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

  • Connections: 0.25-in Swagelok®

  • 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

Intake Assembly

  • Dimensions: 
    31 x 12.5 x 19 cm 
    (12 x 5 x 7.5 in.)

  • Weight: 1.4 kg (3.1 lb)

  • Filter: 1.0-in diameter, sintered stainless steel disk filter, 10-micron pore size, CSI pn 27809

  • Orifice Inside Diameter:
    0.178 mm (0.007 in.)

  • Orifice Heater: 
    2 kohms (0.07 W at 12 Vdc)

  • Mixing Volume: 750 ml

  • Sample Connection: 0.25 in. Swagelok

  • Heater Cable Entry Seals
    Number of connections: 3 (1 in, 2 out)
    Cable Diameter: 2.8 to 6.6 mm 
    (0.11 to 0.26 in)

  • Heater cable screw terminals
    Wire diameter: 26 to 12 AWG
    Wire stripping length: 5.0 mm (0.2 in)
    Screw tightening torque: 0.4 N•m

1 - Average power varies from 12.5 W above 35°C to 22.5 W at –30°C.


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