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Non-Latching Fault
A latching fault activates when an analyzer detects faulty conditions. The latching fault remains
until an authorized operator resets the fault. Non-latching fault events clear themselves as
soon as the faulty conditions disappear.
Alarm Delay
When Alarm delay is ON, a gas alarm will be reported when a gas concentration reaches a level
1 or level 2 alarm setting and stays for more than alarm delay time. If the gas concentration
drops below the alarm setting in less than alarm delay time, the gas alarm event will not be
reported. This option is to filter out flickering gas events.
Generate Sub-LDL Events
This is to record Optic signal exceed the Sub-LDL limits while gas concentration remains zero
as an informative event.
VC4™
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User Manual
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