6-44 | Model 931S / Model 932S UV Analyzers
A Warning indicates the analyzer may require service and the data may
be suspect. Though all Warning alarms cause the Warning Status relay to
de-energize, this relay can also indicate one of these analyzer operating
conditions:
• Performing a gas calibration (Auto-Zero, Zero, Span).
• Performing an analog output calibration.
• Performing Optical Bench setup.
• Flow Control is not in “auto”.
The Warning Status relay returns to the normal energized state automati-
cally when the offending alarm condition is corrected and/or the analyzer
completes one of the above operations.
A Fault indicates that a failure has been detected and the analyzer data is
not valid. Under the Fault situation, the analyzer de-energizes the Fault
Status relay and switches the sample system into “shut-in/off” mode, if
the Flow Control setting is “auto”. If the Fault Status relay is configured
as non-latching (Enable latching of fail alarm on the Alarm Setting and
Stream Switch Parameters dialog box is unchecked), the relay returns
to its normal energized state and the sample system is switched back
to “sample” mode when the offending alarm condition is corrected.
However, if the Fault Status relay is configured as latching (Enable latch-
ing of fail alarm on the Alarm Setting and Stream Switch Parameters
dialog box is checked), the operator must unlatch the relay in one of the
following ways:
• If the Alarm Enable digital input is permanently wired to the Enable
state, view the Status tab and click to uncheck the Conc. Alarm Soft
Enable On/Off button to temporarily Disable the Concentration
Alarms and then click it again to Enable them.
• If the Alarm Enable digital input is wired to a customer’s Distributed
Control System, have the system toggle that line from Enabled to
Disabled and then back to Enabled at least one second later.
Setup (tab)Alarm/
Stream Switch
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