Maintenance and Troubleshooting | 6-55
Alarm Type / Alarm Condition Description and Suggested Corrective Action
Warning Zero Drift This condition indicates excessive Zero Drift, such as when Zero gas
transmission values attained after a Zero have exceeded user-specied
values.
Corrective Action:
• Perform a Zero. See Chapter 5 for calibration information.
• From the Analyzer Data tab, check the Bench Temperature to ensure it
has stabilized.
• From the Status tab, check the Error Condition list for alarms that
indicate contaminated Measuring Cell, optics, and/or sample system.
If necessary, clean the appropriate component(s) of the sample system
that require cleaning.
• From the Gas Calibration dialog box, ensure the ZDriftSpec values are
appropriate and have not been changed.
• This condition may also indicate that the lamps need to be replaced,
especially if a “Warning ALC” alarm is also displayed on the Status tab
(see “Source Lamp Replacement” in this chapter.
Warning Zero Pressure The Zero gas pressure is outside of 1 % to 99 % of full-scale range.
Note: This alarm is used only by analyzers with the pressure transducer
option.
Corrective Action:
• Check the Zero gas regulator on the Zero gas bottle and ensure it has an
adequate supply.
• Check the Zero gas pressure gauge and ensure that it is at an appropriate
pressure (see “Zero Gas” in Chapter 3). Adjust the pressure regulator until
the pressure is at an appropriate level. The pressure must be less than the
1380 kPag (200 psig) maximum Cell Pressure.
• From the Compensations dialog box, check the LowScale and
HighScale Cell Pressure readings. If the HighScale reading is > 100
PSIA (5171.49 mmHg) or the LowScale reading is < 66 PSIA (3413.19
mmHg), this indicates the pressure transducer is saturated; it won’t allow
the analyzer to perform an Auto-Zero.
Adjust the pressure to 80 PSIG and restart the Auto-Zero.
Take appropriate safety precautions, open the Lower Enclosure, and:
• Check the pressure transducer.
• Check the zero solenoid.
• From the Output Setup dialog box, conrm the Low Scale and High
Scale pressure settings are correct.
• Conrm that the Measuring Cell pressure transducer jumpers on the
Customer I/O board are congured correctly (see “Compensations” in
Chapter 4).
• Replace the Customer I/O board. Contact AMETEK to verify operation
before removing this board.
Setup (tab)
Gas Calibration
Setup (tab)
Compensations
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