Aqua Lung i750TC Owner's Manual page 40

If the TMT is not reporting, a message will be displayed for 10 seconds before switching gas. Afterwards, the
i750TC will calculate for the gas change but the Dive Main screen will show a lost transmitter signal.
If the current PO value is greater than 1.6, then a warning not to switch will display. The i750TC will maintain the
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current gas without switching. The diver may overide the i750TC and force the gas switch by pressing the SE-
LECT button during the DO NOT SWITCH TO message.
WARNING: Switching to gases with a PO
!
and drowning. Doing so should always be avoided. It is intended as a last resort option because of the
likelihood of injury or drowning. Always dive within your training, experience, and skill level.
© Aqua Lung International, Inc. (2016)
above 1.6 has a high risk of oxygen poisoning, convulsions,
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40
DIVE OPERATION
Doc. 12-7852-r05 (8/5/16)