24 Agilent 7890B Installation
1 Installing the GC
4
Purge the air from the regulator by repeating the following
procedure 5 times:
a Fully close the regulator knob, then open the main tank
valve.
b Turn the regulator knob fully counter-clockwise to open
the tank main valve, pressurizing the primary side of the
regulator.
c Turn OFF the tank main valve.
d Slowly turn the regulator knob clockwise to release
("bleed off") the gas pressure.
e Close the regulator knob.
The image below illustrates a typical pressure regulator
installation. In the example shown below, which uses an
optional shutoff valve, open the shutoff valve and leave open
during purging.
Connect the tubing to the gas source
1 Turn off all gases at their sources. Measure the length of
tubing needed to connect the gas supply outlet to the inlet
Main tank valve
Primary gauge
Secondary gauge
Shutoff valve
(optional)
Regulator knob
Swagelok adapter
If you need more than 4.5 m (15 feet) supply tubing for a gas source, use
1/4-inch tubing with appropriate hardware. See the Agilent GC, GC/MS,
and ALS Site Preparation Guide for part numbers.
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