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 “Validation
Allowance” on page 2-33. Once activated, the Validation Fail
Alarm must be manually reset via the Cancel Val Alarms parameter
(see “Cancel Val Alarms” on page 2-19).
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 “High Alarm Setpoint” on page 2-24).
• Concentra Low Alarm: This fault occurs when the measured
concentration is below the set limit with the Low Alarm Setpoint
(see “Low Alarm Setpoint” on page 2-25).
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 (see “To change parameters in Mode 2” on page 2-15).
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