Maintenance works must only be undertaken after the temperature of each part has been lowered to less than 50 deg.C.
Place any detached items on a clean sheet or tray. Do not lose or contaminate these items.
Undertake the works using the appropriate tools. Any dirt on the tools being used must be wiped off in advance using gauze etc. dipped in acetone.
Phillips screwdriver, tweezers, hexnut screwdriver (option, Part No. 670-18800)
1 |
Shutdown the system and stop the gas supply for detectors. |
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2 |
Remove two screws of the collector holding bracket. |
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3 |
Remove the collector unit.
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4 |
Check for dirt inside the collector. If dirty, wipe the dirt away using cotton buds soaked in solvent. If using an item like a brush, use a soft one. The damage caused by the use of a wire brush etc. can result in noise.
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5 |
Firmly hold the white insulation with a 6 mm spanner and loosen the high voltage unit fixing nut with a 12 mm wrench. Since the quartz portion of the FID nozzle may be damaged when the high-pressure brush rotates with the insulator, fix it with a 6 mm spanner so that the insulator does not turn |
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6 |
Pull the high voltage brush.
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7 |
Loosen the FID jet with a hexnut
screwdriver. |
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8 |
Detach the FID jet with tweezers.
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9 |
FID jet (0.5 dia.): 221-70162-92 |
Check for any dirt or blockages in the jet. If dirty, wipe the dirt away using a cotton bud soaked in solvent.
Replace it with a new item if it has blockages. Note: For capillary column, use FID jet (0.3 dia.) to get better S/N ratio, but please note that it might be easier to clog up than FID jet (0.5 dia.). |
10 |
Set the FID jet and use the nut driver to turn it until it comes to a firm stop. |
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11 |
Put back the high voltage unit and collector unit by following the removal procedure in reverse.
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12 |
Start up the system. |
Maintenance Top ; GC-2014 Main ; GC-2014 Detector ; GC-2014 Sample Injection Port ; GC-2014 Column Oven