PerkinElmer clarus 500 gc, Installation Manual

Page: 42 / 112

Preparing Your Laboratory
42
Gas Requirements:
All gases must have a minimum purity of 99.995%. Gases used with the mass spectrometer
and ELCD detectors require a minimum purity of 99.999%. Gas cylinders should be located
outside of the laboratory whenever possible and should always be stored and operated in the
vertical position. Always use copper tubing that is free of grease, oil, and organic material
for all gases delivered to the Clarus 500 GC.
Helium, Nitrogen,
8.5% H
2
/91.5% Helium
95% Argon/5% Methane:
A number 1A (200 ft
3
) gas cylinder should be used for
all carrier gases. Filter all gases (except methane)
through a moisture filter and/or hydrocarbon trap and
de-oxo filter. Argon/methane should be filtered
through a moisture filter and a de-oxo filter. Gas
delivery pressure to the GC should be 60 – 90 psig
(414-621 kPa).
Air: A number 1A (200 ft
3
) gas cylinder of compressed air
or an air compressor can be used. All air should be
filtered through a moisture filter. Do
NOT use
“Breathing Air." When using manual pneumatics, gas
delivery pressure to the GC must not exceed 30 psi
(207 kPa). If this is not possible, secondary regulation
will be required. With PPC pneumatics, a delivery
pressure range of 70 – 90 psig (483 - 621 kPa) is
acceptable.
Hydrogen: A number 2 (62 ft
3
) gas cylinder or a hydrogen
generator can be used. All hydrogen should be filtered
through a moisture filter. When using manual
pneumatics, gas delivery pressure to the GC must not
exceed 30 psi (207 kPa). If this is not possible,
secondary regulation will be required. With PPC
pneumatics, a delivery pressure range of 60 – 90 (414-
621 kPa) psig is acceptable.