Alarm types

Your meter has five types of alarms:

Alarm type	Description
Setpoint (standard)	Setpoint alarms compare the actual value of a parameter to a specified limit or range of values. These include measured voltage and current values and calculated power quality values. Some setpoint alarms use high-speed measurements for up to 1 millisecond resolution.
Digital	Digital alarms are triggered on a digital input’s on/off state.
Disturbance (sag/swell)	Disturbance alarms are triggered on a measured sag or swell.
Transient	Transient alarms are triggered on a measured transient event.
Unary	Unary alarms are not configurable and generate an alarm based on the meter’s state, for example, the meter powering up.

Alarms have two states:

Alarm state	Description
Active	The meter detects the alarm condition is met.
Historical	The alarm condition previously existed but the condition has since returned to a non-alarm state.

For more information on Setpoint, Relative Setpoint, Digital Input, Disturbance Analyzer, Transient, High-Speed Transient (ION9000T only), and Sag/Swell modules, see ION Reference Help.