1
Performing Routine Maintenance
Replacing a Column
Thermo Scientific
ISQ 7000 Hardware Manual
33
Installing the Column in the GC Inlet
1. Remove the current column:
a. Open the front door of the GC.
b. Unscrew the transfer line nut and remove the column from the transfer line.
c.
Unscrew the injector and detector nuts and remove the column.
d. Remove the column from the column rack and from the GC.
2. Connect the new column to the injector inside the GC.
a. Unwind the column enough to easily connect its ends to the injector and detector.
b. Wipe about 100 mm (4 in.) of the column with a tissue soaked in methanol.
c.
Insert the column through the injector retaining nut and ferrule (larger end up). If
the M4 retaining nut is used, slide it on the column through the side cut. Wipe the
column again with a tissue soaked in methanol.
d. Use a scoring wafer to score and break the column about 1 cm (0.4 in.) from the end.
Use a magnifying glass to check for an even, flat cut. Repeat if necessary.
e.
Insert a notched septum on the column to hold the retaining nut at this position.
Thread the retaining nut into the injector but do not tighten.
f.
Ensure that the end of the column is the proper distance (splitless = 5 mm,
split = 10 mm, PTV and PTVBKF = 30 mm) from the back of the injector nut.
g. Adjust the column position so that the septum contacts the bottom of the retaining
nut. Use your fingers to tighten the retaining nut until it starts to grip the column.
h. Tighten the column nut finger-tight until it starts to grip the column plus a quarter
turn.
CAUTION BURN HAZARD:
The oven may be hot. Allow it to cool to room temperature
before opening it. The injector will still be hot, so do not touch it.
ATTENTION RISQUE DE BRÛLURE :
le four peut être chaud. Laissez-le refroidir à la
température ambiante avant de l’ouvrir. L’injecteur sera toujours chaud, donc ne le touchez
pas.
Note
Wear clean, lint- and powder-free gloves when you handle the column and
injector ferrule.
Tip
Slide a notched septum on the column before the injector retaining nut to
make it easier to measure the proper distance between the nut and end of the
column.
Содержание ISQ 7000
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Страница 174: ...2 Troubleshooting Contacting Technical Support 146 ISQ 7000 Hardware Manual Thermo Scientific ...
Страница 400: ...3 Advanced Maintenance Replacing Fans and Filters 372 ISQ 7000 Hardware Manual Thermo Scientific ...