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VT 4.0 OPERATING MANUAL
© 2002 Design, 2011
Doc. No. 12-5213-r02 (9/6/11)
HIGH O2
Warning >> at 80 to 99% (240 OTU).
Alarm >> at 100% (300 OTU).
When O2 reaches the Warning level; the Audible will sound during which the O2 value with graphic %O2SAT and an Up Arrow
will flash (in place of DTR) until the audible is silenced (Fig. 66), then DTR will be restored. The Up Arrow will remain on solid
until O2 decreases below 80%.
If O2 reaches the Alarm level; the Audible will sound again during which (2) Up Arrows and the O2 value 100 with graphic
%O2SAT will flash until on the surface (Fig. 67).
• A (< 2 sec) to access ALTs, similar to No Deco.
• M (2 sec) to access Gas/TMT Switching*.
• S (< 2 sec) to activate Backlight or acknowledge alarms.
• S (2 sec) to access Compass*.
*These items can only be accessed while viewing the Main.
High O2 during Deco
When O2 reaches the Warning Level; the Audible will sound during which the O2 value will flash in place of Stop Depth/Time
until the Audible is silenced, then Stop Depth/Time will be restored.
No indication (Up Arrow) is given to ascend.
When O2 reaches 100%, the Audible will sound again during which the O2 value 100 and (2) Up Arrows will flash until on the
surface (Fig. 68).
The full TLBG remains on solid as a reminder of Deco.
• A (< 2 sec) to access ALTs, similar to No Deco.
• M (2 sec) to access Gas/TMT Switching*.
• S (< 2 sec) to activate Backlight or acknowledge alarms.
• S (2 sec) to access Compass*.
*These items can only be accessed while viewing the Main.
High O2 on Surface
Upon ascent to 2 FT (0.6 M) for 1 second (surfacing), the Dive Main screen is displayed for 10 minutes with access to the Dive
ALTs allowed. Surface Interval Time with the SURF icon flashing will be displayed in place of Depth (Fig. 69).
> If O2 is 100%, the value will flash on the Main until it is < 100%, then it will be replaced with dashes and graphic NDC
until 10 minutes elapse, then NORM Surface Main.
> If you surface due to 100% O2 without having completed the Deco obligation, the O2 value 100 with graphic %O2SAT will
flash for the first 5 minutes, then dashes will be dipslayed and operation will enter VGM.
Fig. 66 - O2 WARNING
(during Audible, No Deco)
Fig. 67 - O2 ALARM
(No Deco, until on surface)
(1) Up Arrow is Warning.
(2) Up Arrows is Alarm.
^ ^ ^ ^ ^
^ ^ ^ ^ ^
Fig. 68 - O2 ALARM
(in Deco, until on surface)
Fig. 69 - HIGH O2 ALARM
(on surface < 10 min)
Summary of Contents for VT 4.0
Page 4: ...4 VT 4 0 OPERATING MANUAL 2002 Design 2011 Doc No 12 5213 r02 9 6 11 FEATURES FUNCTIONS...
Page 10: ...10 VT 4 0 OPERATING MANUAL 2002 Design 2011 Doc No 12 5213 r02 9 6 11 NORM SURFACE MODES...
Page 19: ...19 VT 4 0 OPERATING MANUAL 2002 Design 2011 Doc No 12 5213 r02 9 6 11 DIVE MODE FEATURES...
Page 24: ...24 VT 4 0 OPERATING MANUAL 2002 Design 2011 Doc No 12 5213 r02 9 6 11 NORM DIVE MODES...
Page 31: ...31 VT 4 0 OPERATING MANUAL 2002 Design 2011 Doc No 12 5213 r02 9 6 11 GAS TMT SWITCHING...
Page 34: ...34 VT 4 0 OPERATING MANUAL 2002 Design 2011 Doc No 12 5213 r02 9 6 11 GAUG OP MODE...
Page 39: ...39 VT 4 0 OPERATING MANUAL 2002 Design 2011 Doc No 12 5213 r02 9 6 11 FREE DIVE OP MODE...
Page 44: ...44 VT 4 0 OPERATING MANUAL 2002 Design 2011 Doc No 12 5213 r02 9 6 11 COMPASS MODE...
Page 55: ...55 VT 4 0 OPERATING MANUAL 2002 Design 2011 Doc No 12 5213 r02 9 6 11 TECHNICAL DATA...
