12
…3.4
Set Up Alarms
Alarm On
Alarm Off
Falling Fast Rate
Alarm On
Alarm Off
Rising Fast Rate
10.1
1 hour
1 hour
9.5
1 hour
9.5
T
T
1 hour
10.1
T
T
The maximum time it takes to detect an alarm condition
is present (T), in seconds, is calculated as follows:
T = 10.81 +
x 2
The time it takes for the alarm state to be cleared once
the alarm condition has been removed is also equal to T.
Examples shown are for a trip value of 10%/hour on a PV engineering range of 0.0 to 100.0
1800
Trip Value
T = 10.81 +
x 2
1800
10
T = 382 seconds
The maximum time it takes to detect an alarm condition
is present (T), in seconds, is calculated as follows:
T = 10.81 +
x 2
The time it takes for the alarm state to be cleared once
the alarm condition has been removed is also equal to T.
10.1
Examples shown are for a trip value of 10%/hour on a PV engineering range of 0.0 to 100.0
Alarm On
Alarm Off
Falling Slow Rate
Rising Slow Rate
1 hour
9.5
T
Alarm On
Alarm Off
1800
Trip Value
1 hour
10.1
1 hour
9.5
1 hour
T
T
T
T = 10.81 +
x 2
1800
10
T = 382 seconds
…3
BASIC CONFIGURATION LEVEL
Fig. 3.7 Slow Rate Alarms with Hysteresis
Fig. 3.8 Fast Rate Alarms with Hysteresis