TanGO TX1 Guide De Référence page 12

Warning screens (H2S is shown)
Calibration due* Bump test due*
Single sensor Single sensor bump
calibration failure failure with calibration
overdue
*Signals (visual, audible, and vibration) vary based on instrument settings.
** Occurs for ten minutes before critical low battery alarm.
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Dock due* Gas alert *
Single sensor zero Single sensor data
failure failure
8
Low battery warning**
One sensor Installed