250 Volatiles Interface
Replacement procedures
18 of 30
Jun 2001
Inlets
Agilent 6890 Gas Chromatograph Service Manual
Calibrating your interface
Your interface's flow module contains a pressure sensor that must be zeroed
after it is installed on your GC. This calibration procedure ensures an accurate
interface pressure display.
Do not connect the carrier gas to your flow module until you have zeroed your
interface's pressure sensor.
1. Plug in your GC and turn it on, if you haven't already done so.
2. Wait 15 minutes. This allows your GC to reach thermal equilibrium.
3. Zero the interface's pressure sensor:
a. Press [Options], scroll to Calibration and press [Enter].
b. Scroll to Front inlet or Back inlet and press [Enter].
c. Scroll to Pressure Zero.
d. Press [On] to zero the pressure sensor.
4. Turn off your GC.
5. Plumb the carrier gas to your flow module. If you need help with this
step, see the 6890 GC Site Preparation and Installation Manual/CD-ROM.
6. Turn on the GC.
7. Configure your GC's column and carrier gas. See the 6890 Series
Operating Manual/CD-ROM for details.
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