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VTX OPERATING MANUAL
© 2002 Design, 2014 Doc. No. 12-5382-r01 (10/24/14)
FREE SURFACE MODE
FREE dives, which are allowed prior to NORM or GAUG dives as well as after NORM dives, calculate Ni-O2 based upon the
Algorithm selected and a fixed default FO2 of Air. FO2 settings for NORM dives do not affect calculations for FREE Dives.
FREE mode displays NDC Time (on a dive ALT screen) and the TLBG (TL) on surface and dive Main screens, and includes a TLBG
Alarm that activates when it enters the yellow Caution zone (9 segments).
In the event of entry into Deco during operation in FREE mode, operation reverts to VGM for 24 hours.
FREE dive alarms are set, controlled, and operate separately from NORM and GAUG Alarms.
The SURF Main screen remains on display for 10 minutes during which time the unit will enter Dive Mode upon descent to 5 FT
(1.5 M) for 5 seconds.
The unit enters post dive Surface Mode upon ascent to 2 FT (0.6 M) for 1 second and displays the Surface Main with the SURF
icon flashing. Access to Surface ALT screens is allowed during the first 10 minute with access to other surface modes/screens
blocked until 10 minutes elapse.
Exception is for Violations.
When the 10 minute post dive Surface Interval time has elapsed, access to other Surface modes/screens is allowed.
FREE SURF MAIN, information includes (Fig. 72):
> Surface Interval Time (min:sec up to 59:59, then hr:min, colon flashing), with SURF icon (flashing during first minute after
surfacing from dives).
> Graphic FREE.
> Graphic CDT with Countdown Time (up to 9:59 min:sec), if set ON.
> Graphic DIVE with number of that dive (up to 99), 0 if no dive yet.
> TLBG, if any after a NORM or FREE dive.
> Low Battery icon - yellow (if voltage is at the warning level), or red flashing (if voltage is at the alarm level).
• A (2 sec) - to access the Adjust Brightness screen.
• A (< 2 sec) - to access FREE SURF ALT 1.
• M (2 sec) - to revert to the Home Menu.
• M (< 2 sec) - to access the FREE Menu.
• S (2 sec) - to access the Compass OP Main.
ADJUST BRIGHTNESS, information includes (Fig. 73):
> xx % (last value saved). Up to 60% max when Low Battery Warning or Alarm.
• S (2 sec) - to step back to the Main without changing the value.
• A (< 2 sec) - to step upward through values of 10% to 100% one at a time in increments of 10%.
• M (< 2 sec) - to step down through values one at a time.
• S (< 2 sec) - to save the % setting and revert to the Main.
• Revert to Main in 10 sec, if no button is pressed.
FREE SURF ALT 1, information includes (Fig. 74):
> LAST DIVE (screen title).
> xxx FT (or xx.x M) with graphic MAX DEPTH.
> Elapsed Dive Time (up to 9:59 min:sec) with graphic DIVE TIME.
• A (< 2 sec) - to access SURF ALT 2.
• M (< 2 sec) - to step back to the SURF MAIN.
• 10 sec with no button action, revert to the SURF MAIN.
FREE SURF ALT 2, information includes (Fig. 75):
> DATE = m.d.y (or d.m.y).
> TIME = hr:min with AM (or PM) if 12 Hour Format.
> TEMP = xx F (or C).
> ELEV = SEA (or EL2 to EL7).
> FLY = hr:min*
> DESAT = hr:min**
• A (< 2 sec) - to revert to SURF MAIN.
• M (< 2 sec) - to step back to SURF ALT 1.
• 10 sec with no button action, revert to SURF MAIN.
*The Time to Fly counter will begin counting down from 23:50 to 0:00 (hr:min) 10 minutes after surfacing from any dive.
**The Time to Desaturate counter provides calculated time for Tissue Desatuation at sea level taking into consideration the
Conservation Factor setting. It will begin counting down 10 minutes after surfacing from a NORM or FREE dive, counting
down from a maximum of 23:50 to 0:00 (hr:min).
Fig. 74 - FREE SURF ALT 1
(Dive Time is min:sec)
Fig. 72 - FREE SURF MAIN
(SURF & CDT are min:sec)
Fig. 75 - FREE SURF ALT 2
FREE
CDT
5:00
3
SURF
4 2 : 0 6
DIVE
LAST DIVE
DIVE TIME =
MAX DEPTH =
2:16
64 FT
TIME =
TEMP =
SHORTCUT
FLY =
DATE =
ELEV =
7.24.14
3:15 PM
82 F
SEA
6:28
DESAT =
0:54
20%
ADJUST BRIGHTNESS
Fig. 73 - BRIGHTNESS