4-54 | Model 933S UV Analyzer
Display
During normal operation, displays the species being measured (top
line) and its real-time status (bottom line).
When an Auto-Setup is in progress, a message indicating the current
stage of the Auto-Setup is displayed on the top line (the concentration
value continues to be 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 active, see “Trou-
bleshooting and Diagnostics” in Chapter 6 for details about the alarm
and corrective action to take to reset the alarm.
Flow Control
The analyzer gas flow control mode can operate in one of six “sample”
modes. For normal operations, the analyzer operates in the “auto”
mode (Automatic Analyzer Control). All other Flow Control modes
are set manually (by the user).
The Flow Control modes (see Flow Control Legend in software) vary
for different analyzers. The analyzer will operate in the corresponding
Flow Control code that is entered in the Flow Control Mode text field.
After entering a code, click Apply (Flow Control area) to save the
change and set the analyzer into the new Flow Control mode. If the
Flow Control mode is in any mode other than ‘0’ (auto), the message
“Flow Control not in Auto” will be displayed in the Operational Mes-
sage window on the Status tab.
0 = auto
The analyzer will automatically determine and set the mode of opera-
tion (either sample or shut-in) by monitoring the state of the Fault
alarm relay contacts. Upon analyzer start-up and during Fault alarm
condition, the analyzer will automatically shut down the flow.
1 = column-A flow
Manually forces the flow of sample gas through Column A.
2 = column-B flow
Manually forces the flow of sample gas through Column B.
3 = zero
Manually forces the analyzer to continuously Zero its sample system
with Zero gas.
4 = shut-in/shut-off
Manually shuts off the flow of sample gas through the sample system.
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