Operating the Analyzer
Operator’s Manual
2
–
43
•
Laser Zero Low Alarm
: This fault occurs if the detector signal value
is below the set normal range when the laser is turned off.
•
PeakTk Restart Alarm
: This fault occurs when the number of
consecutive system restarts caused by a peak tracking correction
exceeds a preset limit.
•
Pressure High Alarm
: This fault occurs when the pressure in the
sample cell exceeds the specified maximum operating pressure.
•
Pressure Low Alarm
: This fault occurs when the pressure in the
sample cell is below the specified minimum operating pressure.
•
Temp High Alarm
: This fault occurs when the temperature in the
measurement cell exceeds the specified maximum operating
temperature.
•
Temp Low Alarm
: This fault occurs when the temperature in the
measurement cell is below the specified minimum operating
temperature.
•
Validation 1 Failed/Validation 2 Failed Alarm
: An additional
alarm for systems equipped with autovalidation that is triggered
when the measured concentration of the validation 1 or 2 gas does
not agree with the user defined allowable limits. These alarms also
trigger the Validation Fail dry contact relay. Refer to
on page 2-33. Once activated, the
Validation Fail
Alarm
must be manually reset via the Cancel Val Alarms parameter
Refer to Appendix A
for recommendations and solutions to common problems
resulting in a system fault.
User alarms
User alarms are generated based on measurement readings and their relation
to
Mode 2
parameter settings. They include the following:
•
Concentra High Alarm
: This fault occurs when the measured
concentration is above the limit set with the
High Alarm Setpoint
parameter (see
•
Concentra Low Alarm
: This fault occurs when the measured
concentration is below the set limit with the
Low Alarm Setpoint
For systems with heated enclosures, a
Temp Low Alarm
or
Temp High Alarm
fault will activate the
General Fault Alarm
when the enclosure temperature is more than 5
C above or below
the specified temperature (refer to the system drawings or
calibration report for this analyzer). Once the enclosure has
reached the specified temperature, reset the
General Fault
Alarm
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