PN 903-8797, Rev A
Viewing Historical Alarm Messages
Alarms that have been reset can be reviewed from the History Buers in the
Stat\History menu. SCode alarms which have been reset are stored in the ^SC
History Buer. XSCode alarms which have been reset are stored in the ^XSC
History Buer.
Each History Buer contains a maximum of nine (9) alarms. The codes dis-
played represent past alarm conditions, with ^SC1/^XSC1 being the most
recent and ^SC9/^XSC9 being the oldest. If more than nine SCodes alarm ac-
cumulate in a buer, the oldest code is overwritten.
If two or more alarms are detected simultaneously, the displayed alarm SCode
is a sum of the primary codes. To resolve a non-primary SCode into its primary
codes, subtract the largest primary code from the displayed number. Continue
to subtract the largest primary code from the remainder until a primary code is
left.
Example:
The displayed SCode is “20”. The alarms detected are:
20 Total sum of all primary SCodes found
-16 w Dirty Cell [Possible-Cell-Contamination]
4 w No HC DP [Hydrocarbon-Dewpoint-Temperature-Not-Found]
To view the history of alarm messages (SCode or XSCode) detected by the
diagnostics function:
1. From the RUN menu, press once to view the Stat\History main menu
screen.
2. Press repeatedly until the ^SC1 History Buer screen is displayed.
To view the ^XSC1 History Buer screen, press again.
To view the primary codes from either screen, press the ‘+’ or ‘–’ buttons.
3. To back out of either of these screens, press if you wish to view other
Stat\History sub-menus, or press to go to another main menu.
4-46 | 241CE II Hydrocarbon Dewpoint Analyzer
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