User guide

388 Advanced User Guide
15 Miscellaneous Topics
Service Mode
The [Service Mode] key presents the Service Reminders and other
functions.
Service Reminders
Internal counters
This is a set of 12 counters that monitor the use of various items
on the GC, such as syringes, septa, and columns. These counters
only count runs and their definitions are fixed. You can set
limits for each item; when a limit is reached, the Service Due light
on the status board comes on. Examine the limits to identify the
item that has reached its limit.
You may enter a limit for each item, reset a count to 0 by
pressing [Off/No], or disable a counter by entering a limit of 0.
Advanced counters
The GC provides storage for 64 advanced counters. They each
have two thresholds, and the actions based on these counters
can be: do nothing, turn on the Service Due light, or light the
Service Due light and go Not ready.
Advanced counters are not accessible through the GC keyboard,
except for the Disable Advanced Counters function of the Service
Reminders. If they are not disabled, they continue to count, and
continue to act on the set thresholds. This could cause the GC to
become Not ready.
Since the advanced counters cannot be reset or manipulated
without the Agilent G4600AA Lab Advisor software. Disable
Advanced Counters is provided so that they can be turned off from
the GC keyboard by someone who does not wish to use them,
the Lab Advisor software, or an Agilent data system. These
users should disable the advanced counters from the keypad to
avoid possible problems.
Counters can be individually enabled (count or don’t count),
individually reset (start over), and individually set as counting
elapsed seconds or runs. They can be assigned arbitrary
“meanings”, allowing you to set up counters for equipment of
your choice.