6-62 | Model 933 UV Analyzer
Microcontroller Board Alarm Conditions and
Corrective Action
This section lists valid alarms (errors) that originate from the Microcon-
troller board, alarm type (Fault or Warning), descriptions of the alarms,
and suggested corrective actions.
Microcontroller alarms are displayed automatically by the Configura-
tor Software under Error Condition in the Status tab (see Figure 6-13).
The alarm is displayed if the alarm condition exists; otherwise nothing is
displayed.
Alarm Type / Alarm Condition Description and Suggested Corrective Action
Warning PMT Signal The highest signal from either the Measure or Reference PMT is outside its
normal range (2.5–9.84 V
DC
). View these signals from the Optical Bench
Data tab.
Corrective Action:
Take appropriate safety precautions, open the Upper Enclosure, and:
• Check the at cables between the Optical Bench board and Optical
Bench for proper connections and inspect them for damage (cuts, nicks,
burn marks, etc.).
• Initiate an Auto-Setup. Refer to “The Auto-Setup Sequence” in this chapter
for information on how to do this.
• Replace the lamp(s), if necessary (see “Source Lamp Replacement” in this
chapter to determine if the lamps need to be replaced and how to replace
them).
• Replace the Optical Bench and/or PMT Buer boards in the Optical
Bench. Contact AMETEK to verify operation before removing these
boards.
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