INFICON HAPSITE Smart Plus Chemical Identification System - Manual (Page 462)

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HAPSITE Smart Plus Operating Manual
14.5 Consumables
14.5.1 Compressed Nitrogen
A source of pressurized, ultra high purity Nitrogen is required for sample purging
and analysis. Nitrogen delivered by on-board canister or an external Nitrogen
source, regulated to 60-100 psi (approx. 420-700 kPa), may be connected through
the 3/16 in Swagelok quick-connect fitting located at the back of the instrument.
External ultra high purity Nitrogen cylinders must meet the following requirements:
 less than 50 ppb VOCs
 less than 40 ppm Argon
The default methods for the SituProbe consume approximately 370 mL of Nitrogen
per run. Therefore, approximately 8 samples can be collected from a full Nitrogen
Gas canister. For mobile, in-the-field sampling, a 110 L bulk tank of Nitrogen is
available. Larger bulk cylinders of ultra high purity Nitrogen, e.g., 300 ft
3 , can be
used in fixed locations.
WARNING
Nitrogen gas canisters are under pressure.