WATERS CORPORATION 2424, Руководство оператора, Страница: 37 / 196

Making the gas supply connection 2-7
Gas requirements
Use a constant supply of dry, oil-free, filtered nitrogen (or zero-grade, oil-free,
filtered air) to operate the detector. Other inert gases can also be used. Use an
operating pressure, at the regulator, of between 450 to 690 kPa (4.5 to 6.9 bar,
65 to 100 psi).
Making the gas supply connection
The detector is connected to the gas supply via 6-mm plastic tubing (supplied
in startup kit). The tubing attaches to the detector via a fitting on the back of
the unit.
To make the gas supply connection
1. Cut the 6-mm tubing squarely (that is, perpendicular to the tubing’s
horizontal axis).
Warning:
Do not use gases that are not inert. In particular, avoid those
that would allow the combustion of combustible solvents and/or the
oxidation of samples.
Caution:
• A pressure relief valve vents gas to protect the detector when the
input pressure is too high. If you can hear gas leaking from the relief
valve, lower the input pressure to avoid wasting gas.
• Gas cylinders are not recommended for extended operation of the
detector due to the rapid consumption of gas. For example, a
standard tank of nitrogen running a standard flow nebulizer at
170 kPa (1.7 bar, 25 psi) would last approximately 40 hours.