3-42 | Model 900 ADA / Model 930 Sulfur Pit Analyzers
Normal Operation
After the analyzer has been set up and started, the User Interface defaults
to RUN mode. During normal operation in RUN mode, the top line dis-
plays the output parameter names, while their corresponding values are
displayed on the bottom line.
Before engaging the analyzer into normal sampling operation, it is
important to observe and record initial readings of the PMT (pho-
tomultiplier tube) signals and the sample response time when the
analyzer sample system is new and operating at peak efficiency.
It is important to understand what normal operating conditions are,
and how to use this information to help you diagnose problems with
the analyzer.
Recording Initial Readings
AMETEK recommends that you observe and record this information
monthly to obtain a history. From these recordings, you will be able to
determine if there are problems with the analyzer, such as diminishing
PMT signals, or increasing sample response time. These problems typi-
cally indicate maintenance is required.
Keep the log book in a safe location until you need to review it for pat-
terns of diminishing PMT signals or a longer sample response time.
Recording PMT Signals
To check and record the initial PMT signal readings:
1. Manually Zero the analyzer.
2. While the Zero is in progress, view the Show Signals screen and
record the values for the Measure PMT (left side) and Reference PMT
(right side) signals for each filter.
Press ‘1’ to view the signals for Filter 1, ‘2’ for Filter 2, etc.
NOTE
(Show Signals) RUN
F6 11..6
See “Manually Zeroing
the Analyzer” in this chapter.
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