What happens when an alarm triggers and how do I manage triggered alarms?

When an alarm rule's condition is met, the system creates an alarm trigger — a record of the event with full context. Here is the lifecycle of a triggered alarm:

Trigger creation

The alarm worker evaluates all enabled rules periodically (default: every hour). When a reading exceeds the rule's condition, a trigger is created with:

• measured_value: The actual reading that caused the trigger
• expected_value: What the system expected based on the rule
• deviation: The absolute difference between measured and expected
• deviation_percent: The percentage deviation
• context_data: Additional details like the rule name, comparison operator, reading timestamp, and baseline method

Trigger statuses (lifecycle)

1. Active — The alarm just fired. Appears with a red badge in the alarm history. Requires attention.
2. Acknowledged — Someone on your team has seen the alarm and is looking into it. Click the "Acknowledge" button on the trigger row.
3. Resolved — The issue has been fixed. Click "Resolve" and add a resolution note explaining what was done.
4. False Positive — The trigger was not a real issue (e.g., a meter recalibration caused a spike). Click "Mark as False Positive" with a reason.

Where to manage triggers

The alarm history table appears below the chart on both the Dynamic Threshold and Trend-Based pages. It shows up to 50 recent triggers with columns for time, alarm name, severity, measured vs expected values, and status. Each row has action buttons for acknowledge, resolve, and mark false positive.

Notifications

When a trigger is created, the system sends notifications through the channels configured on the rule — dashboard notification (always), email, SMS, push, or webhook. A cooldown period prevents repeated notifications for the same condition.

Dashboard summary strip

At the top of the Alarms page, a compact strip shows counts: active alarms (red), resolved today (green), total rules (cyan), and AI suggestions (purple). These only appear when non-zero.