Shimadzu GC-2010 Plus - Inspection and Maintenance: O-Ring for Glass Insert; Inspection;Maintenance Cycle; Inspection;Maintenance

18 Maintenance and Inspection
18.4
18.
290
GC-2010 Plus
18.4Inspection and Maintenance:
O-ring for glass insert
NOTE For the details on handling the glass insert and O-ring, refer to “12 Injection Port”
18.4.1 Inspection/maintenance cycle
Two types of O-rings are available for the glass insert and the fluoride rubber type is usually
used. But when the fluoride rubber type is used for long hours at the injection port tempera-
ture more than 350 °C, the time duration being leaktight is rather short so check for leakage
every week. When operating the system for long hours at more than 350 °C, the graphite
type is recommended. But the graphite type has a little less sealing effect than the fluoride
rubher type. The fluoride rubber type can be used for sevaral glass insert replacements, but
graphite type can be used only once. However, replacing the O-ring when replacing the glass
insert is recommended.
Normally, rubber O-ring is used. If the rubber O-ring is used above 350 °C for an extended
period, it deteriosates rapidly. Use a graphite ferrule on the glass insert in this case, although
its sealing ability is inferior to the rubber type. Perform inspection and maintenance of the O-
ring when the carrier gas leaks.
To stop leaks, tighten the glass insert nut. If the leak contnues, inspect the O-ring and
replace if necessary.
18.4.2 Inspection/maintenance
Q Preparing the gas chromatograph
Select “Maint INJ” (PF menu) from the [SYSTEM] key main screen.
If the system is operating, press the [SYSTEM] key and select [Maint INJ] (PF menu). The
temperature of the injection port and the column oven automatically drops, and the carrier
gas stops when the temperature drops below 51 °C.
When the message “GC is ready for maintenance” appears on the screen, injection port
inspection/maintenance can begin.
Remove the auto injection if it exists.
Lift up the entire INJ/DET cover, and remove it. Because the detector is hot, use tweezers or
pliers to handle the detector cover.
NOTE For “Maint INJ”, refer to “7 Starting and Stopping the GC [SYSTEM]”.
WARNING
Danger of burns.
Do not perform injection port maintenance until the tempelature of the
injection on port has dropped below 50 °C.
CAUTION
Wait until the injection port has cooled to loosen screws and nuts to
prevent them from binding.