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The GC is ready to analyze the sample or validation stream using the 2 Pt Exp and
the Resp Factor that were calculated during the LCG and HCG runs.
4.3 Troubleshooting and repair concept
The most efficient method for maintaining and repairing the 700XA is a component-
replacement concept that allows you to return the system to operation as quickly as
possible. Sources of trouble, such as printed-circuit assemblies, valves, etc., are identified
during troubleshooting test procedures and are replaced at the lowest level practical with
units in known working order. The defective components are then either repaired in the
field or returned to Measurement Services for repair or replacement.
4.4 Routine maintenance
The 700XA will perform accurately for long periods with very little attention (except for
maintaining the carrier gas cylinders). A bimonthly record of certain parameters will assist
greatly in assuring that your 700XA is operating to specifications. The maintenance
checklist should be filled out bimonthly, dated, and kept on file for access by maintenance
technicians as necessary. This gives you a historical record of the operation of your 700XA,
enables a maintenance technician to schedule replacement of gas cylinders at a
convenient time, and allows quick troubleshooting and repair when it becomes necessary.
A chromatogram, a configuration report, and a raw data report should also be made and
filed with the checklist, furnishing a positive dated record of the 700XA. The
chromatogram and reports can also be compared to the chromatograms and reports run
during the troubleshooting process.
4.4.1 Maintenance checklist
Print the sample maintenance checklist on the following page as necessary for your files. If
you have a problem, please complete the checklist first and have the results available, as
well as the sales order number, when calling your Emerson Process Management
representative for technical assistance. The sales order number can be found on the
nameplate located on the right side wall of the GC. The chromatograms and reports
archived when your GC left the factory are filed by this number.
Note
To find the default measurements for the parameters on the checklist, use MON2020 to view the
GC’s Parameter List.
Operation and maintenance
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