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latching gas alarm events clear themselves as soon as the gas concentration drops below the
alarm setting.
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.
1st TWA Time
Use to set times for the beginning and end of each 8-hour, Time Weighted Average (TWA) period.
Use this option to associate the TWA periods with shifts or any other regular event. The system
calculates and displays the TWA after each 8-hour TWA cycle.
The default setting is 04:00 indicating that the Vertex Edge will run three successive TWA periods
from 04:00 to 11:59, 12:00 to 19:59, 20:00 to 03:59. Remember, the Vertex Edge System uses a
24-hour clock. For example, to set the first TWA to 3:00 P.M., enter 15:00. The system
automatically sets the beginning times of the second and third TWA periods at 8-hour intervals
from the time entered for the first TWA period.
Report Maintenance Fault
Select OFF to disable maintenance faults. When this option is OFF, the Analyzers will not
generate maintenance faults. Instead informative events will be recorded
Vertex Edge System
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User Manual
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