Thermo Scientific Dionex, Operator'S Manual

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6 • LE Liquids Enclosure Description
Doc. 065250-06 03/2020
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A second, identical control panel can be installed for applications, such as
transition metals, that require two gas supplies (one for reagents and one for
standards and mobile phases). This prevents cross-contamination between
reagents such as nitric acid and ammonium acetate-buffered PAR.
6.4 LE Liquid and Gas Connections
•
All liquid connections are made with 3-mm (1/8-in) OD PTFE tubing and 10-
32 ferrule fittings.
•
The gas connection uses a 1/4-in pressfit fitting.
6.5 LE Pneumatic Requirements
All reagent and standard reservoirs and NOWPak mobile phase containers require
a pressurized supply of nitrogen or helium regulated to between 20 and 34 kPa (3
to 5 psi). The gas purity should be appropriate for the application.
To maintain the required pressure, install the reservoirs within 3 m (10 ft) of the
AE enclosure and no more than 0.5 to 1 m (2 to 3 ft) below the bottom of the
enclosure.
After pressurizing the reservoirs and NOWPak containers, wait 15 to 30 minutes
and then check the LE pressure gauge and the supply tanks (if used); if the
pressure is not between 20 and 34 kPa (3 to 5 psi), reset it. It may take several
hours for the pressure to stabilize, depending on how much liquid is in the
NOWPak container.