
Options for alarm on delay
Table C-3: Alarm On Delay
Option
Description
Always
Alarm on delay is always used.
Lost surface
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.
Figure C-7: Behavior of the Alarm On Delay
Always
A
B
C
Off
On
D
D
E
Lost surface
A
B
C
Off
On
D
E
A. Level
B. Time
C. SP1 - High alarm set point
D. Alarm on delay
E. Lost surface (invalid level)
Configuration parameters
Reference Manual
September 2020
00809-0100-4480
90
Rosemount 1408H Level Transmitter