The device vibrates when any alarm condition is active. This can be turned OFF through the SETUP- ALARM OPTIONS menu (® Device Setup).

The device is equipped with an audible alarm.

The horn can be turned OFF through the SETUP- ALARM OPTIONS menu (®Device Setup).

The InstantAlert exclusive feature allows the user to manually activate an audible alarm to alert those nearby to potentially dangerous situations. Holding the q button for approximately 5 seconds while in Normal Measure Mode activates the InstantAlert alarm. Access to this feature may be restricted by user settings. See Device Setup for means to allow/disallow user access.

If MotionAlert is turned ON (®  Device Setup), the device activates a "Man Down" alarm if motion is not detected within 30 seconds. The Alarm LEDs flash, and the horn activates with an increasing audible frequency. MotionAlert is always turned OFF when the device is turned OFF.

Access to this feature may be restricted by user settings. See Device Setup for means to allow/disallow user access.

Stealth Mode disables the visual, audible and vibrating alarms. MSA recommends that this feature be left in its default "OFF" state. Stealth mode can be turned ON through the SETUP - INSTRUMENT OPTIONS menu (® Device Setup). On the display, all three alarm icons are shown as OFF.

The device evaluates the condition of the sensors during Calibration.

As the end of a sensor’s life approaches, a warning is provided. While the sensor is still fully functional, the warning gives the user time to plan for a replacement sensor to minimize downtime. The Sensor Life indicator © displays during ongoing operations as a reminder of a sensor’s pending end of life.

When a sensor’s end-of-life is reached, sensor calibration will not be successful, and the user is then alerted by a Sensor Life Alarm. A flashing Sensor Life indicator © displays during ongoing operations until the sensor is replaced and/or successfully calibrated.

On the display, each displayed gas will have its own Sensor Life indicator. If a sensor is in end-of-life warning, its indicator will be an orange ©. If a sensor has reached end-of-life, it is in alarm and its Sensor Life indicator will be a  ©.

See Calibration for additional details on Sensor Life determination and indication.

The backlight automatically activates when any front panel button is pressed and remains ON for the duration of user-selected timeout.

This duration can be changed using the SETUP - INSTRUMENT SETUP (® Device Setup) or through MSA Link software.