Agilent Technologies 7820A - Maintenance Methods for the 7820 A GC

About Maintaining the GC 1
Maintaining Your GC 13
Maintenance Methods for the 7820A GC
Before most maintenance procedures, the GC must be made
ready. Agilent recommends that you create and store the
following maintenance methods into the GC. The methods below
will:
• Prevent damage to the instrument (electronics, columns,
etc.)
• Avoid injury to the user (burns, shocks, etc.)
• Allow you to perform maintenance on specific areas while
leaving the rest of the GC components at operating
temperature
You can use the software keyboard or your Agilent data system
to create, save, and load these methods.
General GC Maintenance Method
Create this method for instrument column maintenance,
detector maintenance, and general GC maintenance tasks.
• Set the oven temperature to 35 °C. This allows the oven fan to
assist cooling.
• Set all inlet temperatures to 35 °C and set inlet gas pressures
to 0.0.
• If performing column maintenance, remember to wait for
the oven and column to cool down before turning off
column carrier gas flow at the source. Also remember to
cap both ends of the column to keep air out once it is
removed.
• If you are not performing column maintenance, keep inert
carrier gas (helium or nitrogen) flowing to protect the
column.
• Set all detector temperatures to 35 °C.
• If performing FPD
+
maintenance, turn off the GC and
unplug the power cord.
• Some detectors (FID, NPD) use high voltages. For these
detectors, turn the electrometer Off to disable the high
voltage.
NOTE
Inlets and detectors at operating temperature may require 12 hours or
longer to reach the maintenance method setpoints below.