31022
31022
OrderableZero Air Generator
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- Model:
- 31022
- Item Number:
- 31022
- Warranty:
- 1 year (not sieve)
Overview
The Zero Air Generator is a low-cost, handheld source of zero air (air that has been scrubbed of CO2 and water vapor) to be used for zeroing infrared gas analyzers (IRGAs). The 31022 consists of a small pump and a molecular sieve. The pump is powered by 2 AA batteries. A “Test” port located on the 31022 can be used to determine when to replace the molecular sieve.
Technical Description
The 31022 Zero Air Generator provides a source of zero air for zeroing infrared gas analyzers (IRGAs) in both open-path (zero/span shroud required) and closed-path configurations. The zero air generator contains "In," "Out," and "Test" ports, as well as a small battery-powered pump.
During normal operation, air enters the top of the bottle (via the "In" port), which is filled with a molecular sieve. The air flows (0.2 LPM) down the entire length of the bottle, where the molecular sieve removes CO2 and water. The air is pushed into the end of a tube at the bottom of the bottle and then to the "Out" port.
The "Test" port pulls the air from only partway down the bottle, 2 in. above the bottom. Because the unscrubbed air enters the top and flows downward, the molecular sieve is consumed from the top down. Comparing CO2 and water vapor from the "Test" port with the "Out" port indicates when the molecular sieve needs to be replaced.
Specifications
- Operating Temperature Range
- -20° to +50°C
- Capacity
- 750 ml
(holds approximately 450 g molecular sieve)
- Flow Rate
- 0.2 LPM
(typical)
- Power
- 2 AA batteries
- Dimensions
- 13.97 x 9.65 x 27.43 cm
(5.5 x 3.8 x 10.8 in.)
- Weight
- 1.13 kg
(2.5 lb)
Accessories
(1)Replacement Parts
(5)42814
Replacement Molecular Sieve Bottle, 250 g
The 42814 consists of one bottle of molecular sieve desiccant material to refill the bottles in the 44301 Scrub Module for CPEC200/310. This desiccant material is included with the scrub module and is available as a replacement part.
Orderable15891
1/4 in. OD Swagelok Plug
Spare ¼ in Swagelok® plugs are available as pn 15891. This part is used to plug a fitting when the accompanying tube is disconnected, and it is necessary to keep the fittings clean. Campbell Scientific strongly recommends having spare plugs in the event that those provided with the Zero Air Generator are lost or become damaged.
Orderable4180
Velcro Strap, 12 in. x 1 in.
A Velcro strap is used to temporarily secure the Zero Air Generator to a crossarm or tower while carrying out the zero procedure. This strap can be replaced with pn 4180, which is a 30 cm (12 in.) length of 2.5 cm (1.0 in.) wide Velcro with a plastic loop. Campbell Scientific recommends having a spare strap in the event that the one provided with the instrument is lost or damaged.
Orderable29998
Syringe Filter Element for Intake Assembly of AP200
The original filter of the Zero Air Generator can be replaced with pn 29998. This filter is an in-line 2.5 cm (1.0 in.) diameter PTFE membrane filter of 3 micron pore size.
Orderable26064
1.5 V AA Alkaline Cell Battery
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.
Orderable
Compatibility
The 31022 provides a low flow (0.2 LPM) zero air source for zeroing both open-path (zero/span shroud required) and closed-path infrared gas analyzers (IRGAs).