Ametek 931S, Operator'S Manual

Page: 93 / 268

Installation and Start-Up | 3-47
Normal Operation
During normal operation, the Display text field on the Optical Bench ,
Gas Calibration , and Info dialog boxes, and Status tab displays the output
parameter names on the top line, while their corresponding values are
displayed on the bottom line.
During normal conditions, the text is Green; when there is a Warning or
Fault alarm present, the text is Red. If an alarm is present, view the
HC
Scode and MC Scode alarm lists on the Status tab to check which alarm is
present. See Chapter 6 for details about the alarm and corrective action to
take to reset the alarm.
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 to 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 Optical Bench Data tab and
record the values for the PMT Measure and PMT Reference signals
for each filter.

NOTE

Status (tab)

<<HC Scode or MC Scode>>

See “Manual Zero Gas
Calibration” in Chapter 5.