27423 Scrub Module for CPEC200/310

概览

27423气体吸收模块是CPEC200闭路涡度相关系统的附件，用于提供校准用的零气（不含有CO2或H2O的空气）给CPEC200系统，是EC155气体分析仪的调零气体。在大多数情况下，使用高压钢瓶零气作为校准用零气。不过，CPEC200气体吸收模块也可以作为高压钢瓶零气的替代选项。

CPEC200气体吸收模块含有气泵和三级分子筛。气泵由连接到CPEC机箱的线缆（已包含）供电。第一级分子筛应当每年更换一次，以保证零气不含CO2和H2O。

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技术说明

CPEC200气体吸收模块为CPEC200闭路系统提供零气源。环境空气从模块底部的进气口进入，通过第一级分子筛，再流过一个小的气泵，最后流过另外两级分子筛。零气从排气孔或出气口排出。

气体吸收模块的出气口需要用带Swagelok®接头的0.25英寸规格的气管（货号：21823-L）连接到CPEC200的系统机箱。第一级柱状容器中的分子筛应该每年更换一次，以保证零气的质量。建议使用带1.6-2.5 mm小珠直径的13X分子筛。填充一个容器大约需要400 g（干重）分子筛。

产品规格

Volume 480 cm3 (29.29 in.3) for each molecular sieve cylinder
Power 2 W (typical)
Dimensions 39.4 x 34.3 x 20.3 cm (15.5 x 13.5 x 8.0 in.)
Weight 9.6 kg (21.1 lb)

兼容性

Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.

Miscellaneous

Product Compatible Note
CPEC200 (retired)
CPEC300 (retired)
CPEC306
CPEC310

常见问题解答

27423: 5

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  1. To use the CPEC200/310 scrub module as a source of zero gas, is it necessary for the CPEC200/310 system to include a valve module?

    Yes. For more information, refer to the "CPEC200 Scrub Module Installation, Operation and Maintenance" appendix in the CPEC200 Closed-Path Eddy-Covariance System Instruction Manual.

  2. Why did Campbell Scientific start using molecular sieve? Does it have the same effect as the previously used chemicals?

    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:

    1. It was a safer alternative than using the previous chemicals.
    2. Increased shipping regulations for the chemicals limited the number of suppliers. 
  3. To prepare the molecular sieve, how many grams are needed per bottle?

    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 EC150 needs 22 g (drop-in bottle).
    • The IRGASON® needs 22 g (drop-in bottle).
    • The EC155 needs 22 g (drop-in bottle).
    • The AP200 needs 500 g (refill).
    • The 27423 needs 1000 g (refill).
    • The 31022 needs 500 g (refill).
  4. Which countries can the molecular sieve be shipped to?

    The molecular sieve is a non-hazardous material that can be shipped to any country.

  5. Can molecular sieve be used in the future to replace bottles for gas analyzers sold before July 2017?

    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.

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