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6850 Series GC Site Preparation
• If you have not requested option 305 (pre-plumbed tubing), you must
• Agilent strongly recommends two-stage regulators to eliminate pressure
• On/off valves mounted on the outlet fitting of the two-stage regulator are
• Agilent strongly recommends installation of shut-off valves at each GC inlet
• If you purchased automated valving, the valve actuation requires a
• FID and FPD detectors require a dedicated air supply. Operation may be
• Flow- and pressure-controlling devices require at least
• Situate auxiliary pressure regulators close to the GC inlet fittings. This
• Never use liquid thread sealer to connect fittings.
• Never use chlorinated solvents to clean tubing or fittings.
See
Supply tubing for most carrier and detector gases
Use only preconditioned copper tubing (part number 5180-4196) to supply
gases to the instrument. Do not use ordinary copper tubing—it contains oils
and contaminants.
90
supply pre-cleaned, 1/8-inch copper tubing and a variety of 1/8-inch
Swagelok fittings to connect the GC to inlet and detector gas supplies. See
the
Installation Kits
surges. High-quality, stainless-steel diaphragm-type regulators are
especially recommended.
not essential but are very useful. Be sure the valves have stainless-steel,
packless diaphragms.
supply fitting to allow the GC to be isolated for maintenance and
troubleshooting. Order part number 0100-2144. (Note that some optional
installation kits include one shut-off valve. See
separate pressurized, dry air supply at 380 kPa (55 psig). This air supply
must end in a male fitting compatible with a 1/4-inch id plastic tube at the
GC.
affected by pressure pulses in air lines shared with other devices.
10 psi (138 kPa) pressure differential across them to operate properly. Set
source pressures and capacities high enough to ensure this.
ensures that the supply pressure is measured at the instrument (rather
than at the source); pressure at the source may be different if the gas supply
lines are long or narrow.
Basic Tools and Installation Kits
for recommended parts.
for more information.
GC, GC/MS, and ALS Site Preparation Guide
Installation
Kits.)
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