A Pickup setpoint
B Dropout setpoint
ΔT1 Pickup time delay period (in seconds)
EV1 Start of alarm condition
ΔT2 Dropout time delay (in seconds)
EV2 End of alarm condition
ΔT3 Alarm duration (in seconds)
Max1 Maximum value recorded during pickup period
Max2 Maximum value recorded during alarm period
The meter records the date and time when the alarm event starts (EV1) and when it ends (EV2).
The meter also performs any task assigned to the event, such as operating a digital output. The
meter also records maximum values (Max1, Max2) before, during or after the alarm period.
Under setpoint
When the value falls below the pickup setpoint setting and remains there long enough to satisfy
the pickup time delay period (ΔT1), the alarm condition is set to ON. When the value rises above
the dropout setpoint setting and remains there long enough to satisfy the dropout time delay
period (ΔT2), the alarm condition is set to OFF.
A Pickup setpoint
B Dropout setpoint
ΔT1 Pickup time delay period (in seconds)
EV1 Start of alarm condition
ΔT2 Dropout time delay (in seconds)
EV2 End of alarm condition
9810 series - User manual Alarms and alerts
7EN05-0390-08 178
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