Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 400)

<6. Maintenance>
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IM 11B08A01-01E
(E) When cutting a column, use the dedicated column cutter and avoid squashing the cut
end. Make sure that the metal fl akes will not get inside the column. For the fused silica
column, make sure that the cut end is smooth.
(10) Supply the carrier gas.
(11) Confi rm that there is no carrier gas leakage from the column fi ttings.
(12) In order to remove air and water that entered inside the column, fl ow the carrier gas through
the column for about one hour at room temperature. Calibration must be conducted after the
oven temperature has stabilized.
 Cautions for storage
IMPORTANT
• Store columns in a desiccator where temperature can be controlled. The desiccator must be
placed in a location where temperature will not drop below 0 °C.
• For a long-term storage, check for the following once every month.
- Packed column: sealed plugs are secured.
- Mega-bore or Capillary columns: silicone rubber plugs are in place.
(10) Flame Arrester
(1) Stop the operation. (See “3.3.4 Stopping operation” for this procedure).
(2) Stop the supply of power.
CAUTION
The isothermal oven is extremely hot after turning off the power immediately. Keep the purging
air supplied for more than an hour after turning off the power. Keep hands away from the oven
components.
(3) Turn off the supplies of the purging air, carrier gas, hydrogen (or nitrogen) gas for
combustion, combustion air, and sample gas.
(4) Open the control unit door using a key included in the accessory kit.
(5) Remove all of the couplings (two to eight) connected to the fl ame arrester. When removing
the couplings, label them for ease of identifying the connections later.
(6) Remove the fl ame arrester. If the fl ame arrester is threaded through the wall of the
isothermal oven, pull it out.
(7) Install a new fl ame arrester in the reverse order of steps (5) and (6).
(8) Perform a leak test on the piping.
The nuts and sleeves are not included.
K9407QN For normal usage (SUS316)
K9407QS Corrosion-resistance type (Hastelloy C)
2nd Edition : May 11, 2012-00
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