Emerson Rosemount 1408A Reference Manual page 82

Configuration parameters
May 2021
Options for alarm on delay
Table C-1: Alarm On Delay
Option
Always
Lost surface
Figure C-4: Behavior of the Alarm On Delay
C
On
Off
C
On
Off
A. Level
B. Time
C. SP1 - High alarm set point
D. Alarm on delay
E. Lost surface (invalid level)
C.3.3 Set point configuration
High alarm
Enable or disable the high alarm.
82
Description
Alarm on delay is always used.
Alarm on delay is used only for lost surface alarms. This may be useful in
applications when there are small and local rapid level changes caused by
surface turbulence.
Hardware faults and measurement values that exceed the alarm set
points will trigger alarm without any delay.
A
D
Lost surface
A
Always
E
B
D
E
B
D
Rosemount 1408A Level and Flow Transmitter
Reference Manual
00809-0200-4480