Emerson Rosemount 928, Reference Manual, Page: 41 / 204

The gas concentration may be latched. If you select Latch Concentration Alarms, the alarm
output is latched until the alert is manually cleared.
You can reset a latched gas concentration alarm by using Field Communicator or AMS
Wireless Configurator. Refer to
Resetting latched alarms for information about clearing
latched local alarms. If you select Not Latched, the gas concentration alarm clears
automatically when the gas concentration level dissipates below the specified High
Concentration Threshold.
You can also clear latched alarms by resetting the alarm by removing and reinstalling the
power module. Refer to
Remove power module and Install the power module . Latched
alarms do not remain latched following a device reset or power module failure.
Clearing alert history clears process alert history for other alerts, but does not clear latched
gas concentration alerts. Refer to
Clearing process alarm history . You may query alert
history for other process alerts to determine whether they have been active.
Configure process alerts using Field Communicator
Procedure
1. On the Guided Setup screen, select Configure Process Alerts .
Reference Manual Configuration
00809-0100-4928 September 2019
Rosemount 928 41