PN 903-8797, Rev A
Types of Alarms
When alarms are triggered, an LED on the User Interface will be turned On to
notify the operator of this condition. If the alarm is of a serious nature (i.e., a
Fault alarm), the alphanumeric display will ash to alert the operator that im-
mediate attention is required. The alarm condition will also be recorded and
displayed in the SCode and XScode sub-menus and stored in the SCode (^SC)
or XSCode (^XSC) History Buer. These alarm conditions can be viewed at any
time from the User Interface, which makes this an excellent diagnostic tool.
There are three categories of alarms:
Warning Alarms
Warning alarms indicate that the analyzer presently has an abnormal SCode
condition. Warning alarms indicate that the analyzer requires immediate atten-
tion (investigation to the cause of this alarm is required). When this SCode con-
dition occurs, LED 3 turns On to alert the operator to this condition. Examples
of a Warning alarm is if there is an abnormal ending to one of the measuring-
cycle stages (such as the HCDP O-Spec Alarm has been triggered – if LED
6 is On), a condition of the analyzer not locating the HCDP (if LED 4 is On), or
possibly a more serious problem.
A warning alarm may also reveal an O-Spec condition if the O-Spec Alarm is
enabled (LED 1 is O when the O-Spec Alarm is enabled), such as the current
HCDP temperature is above (greater than) the HCDP temperature O-Spec
Alarm setpoint value (ApplicCFG : HCDPA).
Measurement results obtained under a Warning alarm condition are usually
valid, but if one or more of the serious SCodes are output, the resulting data
may be suspect. Check the SCode and XSCode for symptoms.
Maintenance and Troubleshooting | 4-37
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