Advertisement
NOTE: Make sure that the carrier gas source
pressure is at least 35 psi. Carrier source pres-
sure should always be at least 10 psi greater
than the desired inlet pressure.
Performing the leak test
NOTE: Be sure to complete all of the preparation
steps on page 119 before continuing.
1. Set the inlet to "Split Mode."
2. Configure the column as 0 length.
Press [Config] [Column 1] or
[Config] [Column 2] and enter
"0" in the first column of the "Dim" field.
3. Set the inlet's Total Flow to 60 mL/min.
Released: April 2004
4. Set the pressure to 25 psi.
5. Wait approximately 15 seconds for equilibra-
6. Turn the inlet pressure "Off."
6850 Series Gas Chromatograph Service Procedures
Press [Front Inlet] (or [Back
Inlet]) and enter "60" in the "Tot flow"
field.
Scroll to Pressure and enter "25" in the
"Pressure" field.
tion.
If pressure cannot be achieved, either a very
large leak is present in the system, or the
supply pressure is not high enough.
Press [Front Inlet] (or [Back
Inlet]), scroll to the "Pressure" field,
and press [Off]. Both the flow controller
and the back pressure valves will close.
118
Hide quick links:
Advertisement
