Restoring The Gc To Operating Condition - Agilent Technologies 4890 Installation Manual

Gas chromatograph rotary valves
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Installing Rotary Valves

Restoring the GC to operating condition

Hex key wrench
10
1 If the electronics side or top cover was removed to install an
actuator and solenoid, reinstall it now.
2 Plug in the power cord and turn on the GC.
3 Configure the valves. See your GC Operating Manual if you
need help.
4 Connect the solenoid air line to a source of clean, dry air at
55 psi.
If your detector also uses air, pulses in a shared air line may
affect it. The solenoid air supply should be separate from the
detector air supply.
5 Turn on the air supply to the solenoid valves.
6 Use a flat blade screwdriver to turn each installed valve ON
and OFF. Ensure that each valve is physically in the OFF
position as described on
Use the 3 mm hex key wrench to tighten the link arm
7
lockscrew by rotating it clockwise until very tight.
Figure 13
Tightening the link arm lockscrew
8 If it was removed, reinstall the detector cover.
page
5.
Installing Rotary Valves

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