Industrial Scientific TANGO TX1 Guide De Référence page 12

Alarms and Warnings
Event type Possible causes
Warnings.
The unit is overdue for a calibration.
Note: The bump test overdue screen is similar to
this screen but features the bump test icon, not
the calibration icon.
Calibration overdue
A data-related function has failed for one of the
sensors.
The warning and sensor-location icons indicate
which sensor is in failure (sensor 1 or "SE 1"
Single-sensor data
shown here).
failure
The check mark indicates one installed sensor is
operational; the warning and sensor-location icon
indicate which sensor is not installed (sensor 1 or
"SE 1" shown here).
One sensor installed
* Once the gas concentration changes, the alarm indicators will change or turn off to reflect the new readings.
Note: For additional assistance in resolving any alarm or warning, see an on-site supervisor or contact ISC Technical Support (see "Contacts").
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Recommended actions
The unit is operational.
Respond according to company safety policy and
guidelines.
Qualified personnel can calibrate the unit (see Product
Manual).
The unit is operating as a single-sensor instrument.
Respond according to company safety policy and
guidelines.
The unit is operating as a single-sensor instrument.
Respond according to company safety policy and
guidelines.