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INSTRUCTION

MANUAL

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 .

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Summary of Contents for 31022

Page 1: ...INSTRUCTION MANUAL 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 ...

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Page 3: ...ducts to CSI CSI will return such Products by surface carrier prepaid within the continental United States of America To all other locations CSI will return such Products best way CIP port of entry per Incoterms 2010 This warranty shall not apply to any Products which have been subjected to modification misuse neglect improper service accidents of nature or shipping damage This warranty is in lieu...

Page 4: ...ng container Campbell Scientific s shipping address is CAMPBELL SCIENTIFIC INC RMA _____ 815 West 1800 North Logan Utah 84321 1784 For all returns the customer must fill out a Statement of Product Cleanliness and Decontamination form and comply with the requirements specified in it The form is available from our web site at www campbellsci com repair A completed form must be either emailed to repa...

Page 5: ...fore beginning work Wear a hardhat and eye protection and take other appropriate safety precautions while working on or around tripods and towers Do not climb tripods or towers at any time and prohibit climbing by other persons Take reasonable precautions to secure tripod and tower sites from trespassers Use only manufacturer recommended parts materials and tools Utility and Electrical You can be ...

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Page 7: ... 6 2 Zeroing an Open Path IRGA 6 6 3 Zeroing a Closed Path IRGA 7 7 Maintenance 8 7 1 Replacing Batteries 8 7 2 Replacing Molecular Sieve 10 7 3 Replacing Filter 13 Figures 4 1 Zero Air Generator 2 6 1 Zero Air Generator port configuration 5 6 2 Internal connections of Zero Air Generator 6 6 3 Zero Air Generator connected to LI 7500 in open loop configuration 7 6 4 Zero Air Generator connected to ...

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Page 9: ... of the Zero Air Generator inspect the packaging and contents for damage File damage claims with the shipping company Contact Campbell Scientific to facilitate repair or replacement The Zero Air Generator ships with the instrument three sets of 1 4 in Swagelok nuts and ferrules and two 1 5V AA alkaline batteries 4 Overview The Zero Air Generator is a low cost handheld source of zero air air that h...

Page 10: ...mp in the Zero Air Generator circulates a low flow through a bottle filled with molecular sieve that removes CO2 and water vapor and pushes it through the zero span shroud The Zero Air Generator may also be used to zero a closed path IRGA such as the EC155 sold by Campbell Scientific Inc or the LI 6262 LI 7000 LI 7200 or LI 840A sold by LI COR Inc Closed path analyzers do not require a zero span s...

Page 11: ...crubs an air sample of CO2 and water vapor with a 13X molecular sieve The sieve requires periodic replacement Campbell Scientific offers pn 27450 which is a bottle containing 250 g of 13X molecular sieve beads ranging from 1 6 to 2 5 mm diameter Two 250 g bottles are required to replace the sieve Filter The original filter of the Zero Air Generator can be replaced by the filter available as pn 299...

Page 12: ...ximately 450 g molecular sieve Flow rate 0 2 LPM typical Power two AA batteries 6 Operation 6 1 Theory of Operation In normal operation ambient air enters the Zero Air Generator through an In port on the front of the module flows through an inline filter and is pushed by a small pump into the top of a bottle containing molecular sieve The molecular sieve removes the CO2 and water vapor from the ai...

Page 13: ...le has been consumed If air from the Test port contains more CO2 or water vapor than the air exiting the Out port the molecular sieve should be replaced Molecular sieve 13X with 1 6 2 5 mm bead diameter is recommended Approximately 450 g is needed to refill the bottle see Section 4 1 2 Replacement Parts p 3 The In port should either be connected to the exhaust side of an IRGA zero span shroud or s...

Page 14: ...Generator to the IRGA zero span shroud in either an open loop or a closed loop configuration FIGURE 6 3 shows the zero span shroud connected to an LI 7500 in an open loop configuration FIGURE 6 4 shows the Zero Air Generator connected to an IRGASON in a closed loop configuration Either configuration will give good results The closed loop configuration will exhaust the molecular sieve more slowly w...

Page 15: ... may also be used with a closed path IRGA in either an open loop or a closed loop configuration FIGURE 6 5 shows the Zero Air Generator connected to an LI 840A sold by LI COR Inc in a closed loop configuration Connect the Out port to the LI 840A IN port and the LI 840A OUT port to the Zero Air Generator In port Turn the pump on to start the flow of zero air Follow the recommendations of the IRGA m...

Page 16: ...atteries 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 2 Loosen the three screws that attach the lid and remove the lid as shown ...

Page 17: ... the battery holder and lid in the reverse order Batteries will typically last approximately 45 hours of operation The pumping speed will depend on the charge state of the batteries as shown in FIGURE 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...

Page 18: ... 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 p 4 Two bottles of pn 27450 are needed to fill the bottle when replacing the molecular sieve material as described in the following steps and illustrations 1 Loosen the three screws that attach the box lid as shown in step 1 of Section 7 1 Replacing ...

Page 19: ...acket approximately one turn 4 Slide tubes out until filters touch the bottle cap Pull gently at first increasing force just until the tubes begin sliding out Stop pulling when you feel the filter touch the bottle cap Pulling too hard will pull the filter off the end of the tube NOTE ...

Page 20: ...e 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 Jiggle the bottle slightly to settle the beads and make room for the tubes and filter 8 Place O ring on top of the bottle and secure the cap tightly to the bottle ...

Page 21: ...or s inlet filter is likely to last several years with normal usage Heavy use in dirty environments may eventually clog the filter causing a reduction of air flow If the inlet filter becomes plugged it may be replaced with pn 29998 through the following steps 1 Loosen the three screws and remove the box lid 2 Twist the fittings on each side of the filter to remove the filter 3 Replace the filter w...

Page 22: ...Zero Air Generator 14 ...

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Page 24: ...om br Campbell Scientific Canada Corp CSC 14532 131 Avenue NW Edmonton AB T5L 4X4 CANADA www campbellsci ca dataloggers campbellsci ca Campbell Scientific Centro Caribe S A CSCC 300 N Cementerio Edificio Breller Santo Domingo Heredia 40305 COSTA RICA www campbellsci cc info campbellsci cc Campbell Scientific Ltd CSL Campbell Park 80 Hathern Road Shepshed Loughborough LE12 9GX UNITED KINGDOM www ca...

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