Related Manuals for Campbell 31022
Summary of Contents for Campbell 31022
- Page 1 Zero Air Generator 6/15 C o p y r i g h t © 2 0 1 5 C a m p b e l l S c i e n t i f i c , I n c .
- Page 3 Limited Warranty “Products manufactured by CSI are warranted by CSI to be free from defects in materials and workmanship under normal use and service for twelve months from the date of shipment unless otherwise specified in the corresponding product manual. (Product manuals are available for review online at www.campbellsci.com.) Products not manufactured by CSI, but that are resold by CSI, are warranted only to the limits extended by the original manufacturer.
- Page 4 SCIENTIFIC, INC., phone (435) 227-9000. After an application engineer determines the nature of the problem, an RMA number will be issued. Please write this number clearly on the outside of the shipping container. Campbell Scientific’s shipping address is: CAMPBELL SCIENTIFIC, INC.
- Page 5 • Periodically (at least yearly) check electrical ground connections. WHILE EVERY ATTEMPT IS MADE TO EMBODY THE HIGHEST DEGREE OF SAFETY IN ALL CAMPBELL SCIENTIFIC PRODUCTS, THE CUSTOMER ASSUMES ALL RISK FROM ANY INJURY RESULTING FROM IMPROPER INSTALLATION, USE, OR MAINTENANCE OF TRIPODS, TOWERS, OR ATTACHMENTS TO TRIPODS AND TOWERS SUCH AS SENSORS, CROSSARMS, ENCLOSURES, ANTENNAS, ETC.
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Page 7: Table Of Contents
Table of Contents PDF viewers: These page numbers refer to the printed version of this document. Use the PDF reader bookmarks tab for links to specific sections. 1. Introduction ..............1 2. Cautionary Statements ..........1 3. Initial Inspection ............1 4. -
Page 9: Introduction
Zero Air Generator Introduction The Zero Air Generator (pn 31022) provides a convenient source of zero air (air that contains no CO or water vapor) for zeroing a gas analyzer where normally a compressed-gas cylinder of zero air would be used. The Zero Air... -
Page 10: Zero Air Generator
FIGURE 4-1. Zero Air Generator The Zero Air Generator makes it easy to zero an IRGA in the field. For open- ® path IRGAs, such as the IRGASON or EC150 (sold by Campbell Scientific ® Inc.) or the LI-7500 (sold by LI-COR , Inc.), a zero/span shroud is also... -
Page 11: Accessories
AA alkaline cells The power that operates the small pump of the Zero Air Generator is supplied by a pair of AA alkaline cells. Campbell Scientific offers pn 26064 which is a long-life 1.5 V, AA alkaline battery. Molecular sieve... -
Page 12: Specifications
4180, which is a 30 cm (12 in) length of ® 2.5 cm (1.0 in) wide Velcro with a plastic loop. Longer or shorter straps are also available. Contact Campbell Scientific for details. Specifications Dimensions Length: 14.0 cm (5.5 in) -
Page 13: Zero Air Generator Port Configuration
Zero Air Generator FIGURE 6-1. Zero Air Generator port configuration The Test connection pulls air from two inches above the bottom of the bottle of molecular sieve. This air sample is used to monitor the effectiveness of the molecular sieve scrubbing the air. Because unscrubbed air enters at the top and flows downward, the molecular sieve will be consumed from the top down. -
Page 14: Zeroing An Open-Path Irga
Zeroing an Open-Path IRGA The Zero Air Generator makes it easy to zero an IRGA in the field. For open- ® path IRGAs, such as the IRGASON or EC150 (sold by Campbell Scientific ® Inc.) or the LI-7500 (sold by LI-COR , Inc.), a zero/span shroud is required. -
Page 15: Zeroing A Closed-Path Irga
Zero Air Generator FIGURE 6-3. Zero Air Generator connected to LI-7500 in open-loop configuration FIGURE 6-4. Zero Air Generator connected to IRGASON in closed- loop configuration Zeroing a Closed-Path IRGA The Zero Air Generator may also be used with a closed-path IRGA in either an open-loop or a closed-loop configuration. -
Page 16: Maintenance
Zero Air Generator FIGURE 6-5. Zero Air Generator connected to LI-840A Maintenance Replacing Batteries The Zero Air Generator ships with two AA alkaline cells. Refer to the following instructions and figures to replace the batteries. 1. Make sure the switch is in the “OFF” position as shown on the lid of the Zero Air Generator. - Page 17 7-1. Replace the batteries if the pump seems to be running slower than normal, or if it does not run at all. Replacement batteries can be obtained from Campbell Scientific as pn 26064, but can usually be sourced locally. Any type of AA cells may be used: rechargeable or disposable.
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Page 18: Replacing Molecular Sieve
Zero Air Generator FIGURE 7-1. Pumping speed relative to hours of use, indicating time for battery replacement Replacing Molecular Sieve The molecular sieve in the Zero Air Generator requires periodic replacement. Time for replacement can be determined by comparing the values of an air sample taken from the Test port to those of an air sample taken at the Out port as described in Section 6.1, Theory of Operation . - Page 19 Zero Air Generator 3. Loosen the four screws that clamp the bottle cap to the bracket approximately one turn. 4. Slide tubes out until filters touch the bottle cap. NOTE Pull gently at first increasing force just until the tubes begin sliding out.
- Page 20 Zero Air Generator 5. Remove the bottle, keeping it upright to avoid spilling the contents, and set the O-ring aside for reassembly. 6. Empty the old molecular sieve into a disposal container and dispose according to local regulations. 7. Fill the bottle with new molecular sieve until the sieve is mounded as much as possible.
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Page 21: Replacing Filter
Zero Air Generator 9. Invert the bottle assembly so the tubes can be more easily pushed in to the molecular sieve. ® 10. Tighten the two 1/8-in Swagelok nuts. 11. Tighten the four screws that clamp the lid to the bracket. 12. - Page 22 Zero Air Generator...
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