6-56 | Model 931S / Model 932S UV Analyzers
Microcontroller Board Alarm Conditions and
Corrective Action
This section lists valid alarms (errors) that originate from the
Microcontroller board, the Bit and Decimal Value for each Alarm Type
(Fault or Warning), descriptions of the alarms, and suggested corrective
actions. The letter ‘f’ preceding the alarm condition indicates it is a Fault,
while ‘w’ indicates it is a Warning.
Microcontroller alarms are displayed automatically by the Configurator
Software under MC Scode in the Status tab (Figure 6-13). If no alarm con-
dition exists, nothing is displayed.
Decimal Alarm
Bit Value Type Alarm Condition / Description and Suggested Corrective Action
0 1 Warning w: PMT signal out of range
The signal from either the Measure or Reference PMT is outside its normal range
(2500 mV–9840 mV. 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. See “The Auto-Setup Sequence” in this chapter.
• 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. Contact AMETEK to
verify operation before removing these boards.
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