Tusa Element II, Owner'S Manual

Page: 74 / 116

74
M A
S
SWITCHING GAS MIXES (NORM only)
During NORM Dives, the FO2 calculations/displays can be switched from Gas 1 to 2.
> Switching Gas cannot be performed while on the surface.
> Every dive begins with Gas 1 and 10 minutes after surfacing from a multiple gas
dive, operation defaults to the Gas 1 FO2.
> Access to Gas Switching screens can only be accomplished during the time that a
NORM Dive Main screen is being displayed and cannot be performed during the
time that an Alarm is sounding.
NOTE: If a Switch to a new Gas mix would expose the diver to a
prohibitive PO2 level of 1.60 ATA or greater, the Audible Alarm will
sound and the graphics DO - NOt - CHNG GAS will flash on the dis-
play (Fig. 70) until the Audible is silenced.
Due to the possibility that sufficient air may not be available in
the Switch From tank to complete the dive, the Switch to the
prohibitive Mix is still allowed.
> If the Switch is made to the prohibitive Mix, the High PO2
Alarm will activate.
> If in Deco, the graphic PO2 will flash in place of TAT until
PO2 decreases below 1.60, then TAT will be restored.
Switching of Gas Mixes can only to be performed during the
time that a Gas Switch Preview screen is being displayed.
Fig. 70 - DO NOT CHANGE
GAS ALARM
A
L