6-32 | Model 241CE II Hydrocarbon Dewpoint Analyzer
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 flash to alert
the operator that immediate 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 Buffer. 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 im-
mediate attention (investigation to the cause of this alarm is required).
When this SCode condition 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 Off-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 prob-
lem.
A warning alarm may also reveal an Off-Spec condition if the Off-Spec
Alarm is enabled (LED 1 is Off when the Off-Spec Alarm is enabled), such
as the current HCDP temperature is above (greater than) the HCDP tem-
perature Off-Spec Alarm setpoint value (ApplicCFG : HCDPA).
Measurement results obtained under a Warning alarm condition are usu-
ally valid, but if one or more of the serious SCodes are output, the result-
ing data may be suspect. Check the SCode and XSCode for symptoms.
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