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| NG C820 0 AN D PGC1000 US ER MAN UA L | 2101510 MNAH
Fault
Indicates that a malfunction exists that may affect the operation of the device and
most likely will provide unexpected results. The fault will keep any affected streams
from having their data updated. However, a fault does not stop a scheduled or
manually initiated calibration from occurring; and if the calibration corrects the alarm
condition, the alarm will be cleared.
System Fault Indicates that a maintenance problem exists. Analysis processing will still occur
depending on the problem; however, results will not be updated for any stream while
this condition exists. Default system faults are already defined. Do not use this
category of alarm unless you want to stop all stream data from being updated.
11.2.1
Alarm definitions
The user can define the threshold for the alarm parameters. The analyzer provides 124 standard
alarms. Of these, the alarms in
are set to default. Do not change the system alarms. The
user may define additional alarms, beyond defaults, for each process stream.
Table 11-6: Default alarm definitions
Alarm Descriptions
Logic Type
Threshold Default
Severity
Pressure Regulator 1
GT
0
Fault
Pressure Regulator 2
GT
0
Fault
Sample Pressure
GT
0
Fault
Oven Temperature Error
GT
0
System Fault
No Stream Valve Selected
GT
0
System Fault
Digital-Analog Bd Comm Error
GT
0
System Fault
Calculation Error
GT
0
Fault
Calibration Un-Normalized Total
GT
0
Fault
Stream Sequence Error
GT
0
Fault
Calibration CV Percent Error
GT
0
Fault
RF Pct Error
GT
0
Fault
Analog Bd Ambient Temp
GT
0
Warning
Analog Power Supply
GT
0
Warning
Out of Carrier Gas (DI1)
LT
1
System Fault
Out of Cal Gas (DI2)
LT
1
System Fault
GCM Chromatogram Process
GT
0
System Fault
Bad Bead
GT
0
Fault
Sample Flow Detect
GT
0
Fault
CPU Loading
GT
85
Warning
System Memory Available
LT
500000
Warning
Ram File Available
LT
1000000
Warning
Flash File Available
LT
1000000
Warning
Missing Peak-Cal Not Used
GT
0.0000
Warning
Stream Un-Normalized Total
GT
0.000
Warning
11.2.2
Pressure Regulator 1 or 2 Alarm
This alarm indicates low or restricted carrier pressure. The causes could be an empty or low carrier
cylinder, restricted pressure, or a blockage inside the GC module.
To troubleshoot the pressure regulator:
1.
If the carrier cylinder regulator includes an installed low pressure switch, investigate if the low
carrier gas cylinder warning is also present.
2.
If the low carrier gas cylinder warning is present, replace the carrier gas cylinder.
3.
Verify the carrier gas cylinder pressure is above 90 PSIG. If the pressure is below 90 PSIG,
replace the carrier gas cylinder.
4.
Verify the carrier gas cylinder pressure regulator set point is 90 PSIG. If not, correct the set
point to 90 PSIG.
5.
Verify the column vent 1 (CV1) and 2 (CV2), sample vent (SV) and gauge port vent (GPV) are
open and unobstructed.
6.
Check the sampling system for leaks and tubing restrictions. Repair the leak or restriction, if
found.
