Vaisala Optimus OPT100, User Manual

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4. For each alert you want to configure, enter the
a. Enter the Caution Limit in ppm. This is the lower limit that triggers an alert with
caution severity.
b. Enter the Alarm Limit . Alarm limit should be higher than the caution limit.
c. Set the alert to On to enable it.
Settings are applied immediately.
It is possible to have only caution or alarm severity active. If you leave a limit
value empty or enter a zero, the corresponding severity will not be active for
that alert.
3.4 Acknowledging Gas Level Alerts
Acknowledging a gas level alert disables all indications of the alert:
• User interface messages for that alert are hidden
• If one or more relays have been activated by the alert, they are inactivated
• Status LEDs do not indicate the alert
• Output protocols do not communicate the alert as active
Admin user can acknowledge alarms or enable automatic acknowledging from the Alerts
page in the user interface:
• Select Acknowledge alerts > OK to immediately acknowledge all active alerts.
• Enable Automatic acknowledging to automatically acknowledge individual alerts when
the criteria below are fulfilled:
• Alerts for measured values are cleared when there have been 20 consecutive reliable
measurement cycles with result below the alert limit.
• Rate of change (ROC) alerts are acknowledged immediately when the ROC value is
below alert limit by at least 10%.
If alert activation criteria are met again, it will be activated even if previously
acknowledged. Turning an alert off will prevent it from activating again, and will
also acknowledge it if currently activated. Changing the alert limit will not
acknowledge a currently active alert.
OPT100 User Guide M211858EN-E
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