6-60 | Model 931S / Model 932S UV Analyzers
Decimal Alarm
Bit Value Type Alarm Condition / Description and Suggested Corrective Action
4 16 Warning w: Bench auto-setup problem
This condition indicates problems with the operation of the Optical Bench during
an Auto-Setup.
This alarm will be set if the Auto-Setup cannot hit Signal Max; the Auto-Setup will
be aborted.
This alarm will also be set if the PMT Level or PMT Balance value is greater
than 8000 mV or less than 2000 mV.
Corrective Action:
From the Optical Bench dialog box, check for deviations outside of these
ranges.
Perform the following checks, correct any faults, and restart the Auto-Setup:
• Ensure that the Measuring Cell was zeroed.
Take appropriate safety precautions, open the Upper Enclosure, and:
• Make sure the source lamps are not burned out.
• Ensure the lamp sockets are attached securely to the lamps.
• Ensure the lamps are inserted completely into the Lens Block in the Detector
Block Assembly.
• Make sure the lamp power supply cables are connected and not damaged.
• Ensure the PMT high-voltage (JP100, JP101) and at (J103) cables are
connected and not damaged.
• Align the source lamps and restart the Auto-Setup.
• Adjust the jumper positions located at P300 and P301 on the Optical Bench
board. See “Manipulating the PMT Level and PMT Balance” and Figure 6-10 in
this chapter for a description of the eects on the PMT Balance and PMT Level
in relation to dierent jumper positions.
• Ensure the Measuring Cell and its Windows are clean and not damaged.
• Check and clean, if necessary, the Mirror in the PMT Block. Contact AMETEK
to verify operation before checking.
Setup (tab)Optical
Bench
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