10 Maintaining Your GC
1 About Maintaining the GC
Overview of Maintenance
This manual details the routine tasks needed to maintain the
7890 Series Gas Chromatograph (GC). The procedures
assume a basic knowledge of tool use and of GC operation.
Readers are, for example, expected to know how to:
• Safely turn devices on and off
• Load methods
• Change component temperatures, flows, and pressures
• Make typical pneumatic connections using Swagelok and
other standard fittings
• Reset GC service counters
Where to find a procedure
Included in this manual are chapters on maintaining the
following GC components:
• Capillary Columns
• Split/Splitless Inlet
• Purged Packed Inlet
• COC Inlet
• Multimode Inlet
• PTV Inlet
• Volatiles Inlet (VI)
• FID
• TCD
• uECD
• NPD
• FPD
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• FPD
• Auxiliary EPC
• PCM
• Valves
Each chapter includes:
• A list of the most commonly used consumables and parts
for the component
• An exploded parts view of the component
• Detailed procedures for routine maintenance tasks
associated with the component
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