22 Agilent 7890B Installation
1 Installing the GC
Step 4. Connect gases and traps
Most of installation involves plumbing gas to tanks, filters, and
flow modules. Swagelok fittings are used to make leak-tight
connections. If you are not sure how to make a Swagelok
connection, see Appendix A for instructions.
Install the gas regulators
1 Select the appropriate CGA regulator for each gas type. (In
other countries, refer to local standards. See the Agilent GC,
GC/MS, and ALS Site Preparation Guide for requirements.)
2 Confirm that the outlet fitting of the regulator is 1/8-inch
Swagelok. If not, install the appropriate adapter fitting. Wrap
Hydrogen is a flammable gas. If hydrogen or any other flammable
gas is used, periodic leak tests should be performed. Be sure that
the hydrogen supply is off until all connections are made, and
insure that the inlet fittings are either connected to a column or
capped at all times when hydrogen gas is present in the
instrument.
Substituting parts or performing any unauthorized modification to
the instrument may result in a safety hazard.
The insulation around the inlets, detectors, valve box, and the
insulation cups is made of refractory ceramic fibers (RCF). To
avoid inhaling RCF particles, we recommend these safety
procedures: ventilate your work area; wear long sleeves, gloves,
safety glasses, and a disposable dust/mist respirator; dispose of
insulation in a sealed plastic bag; wash your hands with mild
soap and cold water after handling RCFs.
Table 3 Gas regulators, 1/8-inch, U.S. only
*
* For 1/4-inch tubing, purchase a 1/4-inch to 1/8-inch adapter, U.S. only.
Description Part number
CGA 346, 125 psig max (8.6 bar), Air 5183-4641
CGA 350, 125 psig max (8.6 bar), H2, Ar/Me 5183-4642
CGA 540, 125 psig max (8.6 bar), O2 5183-4643
CGA 580, 125 psig max (8.6 bar), He, Ar, N2 5183-4644
CGA 590, 125 psig max (8.6 bar), Air 5183-4645
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