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VTX OPERATING MANUAL
© 2002 Design, 2014 Doc. No. 12-5382-r01 (10/24/14)
VIOLATION GAUGE MODE (VGM)
If a Deco Stop Depth greater than 70 FT (21 M) is required, operation will enter VGM. This would be preceded by DV2.
Operation would then continue in VGM during the remainder of that dive and for 24 hours after surfacing.
VGM turns the VTX into a digital instrument without any decompression or oxygen related calculations or displays.
Upon activation of VGM, the Audible will sound for 10 seconds during which full TLBG* will flash, then be removed.
VGM MAIN, information includes (Fig. 54) -
> Current Depth with FT (or M) icon.
> Graphics GO UP VIOLATION with 2 Up Arrows (red), flashing until on surface.
> Graphic GAS 1 (or 2, 3, 4), one in use.
> Pressure with PSI (or BAR) icon.
> GTR (min) with icon.
> Full TLBG, flashing during Audible, then removed.
> VARI while ascending.
> 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 Adjust Brightness.
• A (< 2 sec) - to access ALT.
• M (2 sec) - to access the Gas/TMT Switch Menu*.
• S (< 2 sec) - to restore screen Brightness from the Auto Dim level to the % level you last adjusted it to.
• S (< 2 sec) - to acknowledge alarms; this will also restore screen Brightness if it was dimmed by Auto Dim.
• S (2 sec) - to access Compass*.
*These items can only be accessed while viewing the Main.
VGM ALT information is similar to the Deco ALT.
VGM ON SURFACE
The graphic VIOL flashes for the first 10 minutes, then VIOL (Fig. 55) alternates with NORM (each On 3 seconds) until unit shut
down after 24 hours with no dives*.
*A full 24 hour surface interval must then be served before all functions are restored.
During that 24 hours, access to all menus and screens is available except those associated with Ni-O2 calculations such as Plan,
Set FO2. The Fly countdown timer provides the time remaining (of the 24 hours required) before normal operation can resume
with full features and functions.
Operation also enters VGM 5 minutes after surfacing from a dive in which a Delayed Violation occurred or O2 reached 100%.
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HIGH PO2
Warning >> at 0.20 less than the alarm value set for the Gas in use.
Alarm >> at the value set for the Gas in use, except in Deco then at 1.60 only.
When partial pressure of oxygen (PO2) increases to the Warning level; the Audible will sound during which the graphics PO2 =
1.xx (yellow) will flash in place of DTR (Fig. 56A).
After the Audible is silenced, DTR is restored.
If PO2 continues to increase and reaches the PO2 Alarm level set for the gas in use, the Audible will sound again during which
the graphics GO UP PO2 = 1.xx with Up Arrows (red) will flash in place of DTR* (Fig. 56B) until PO2 decreases below the set
point at which time DTR will be restored.
*DTR moves to the ALT screen.
• A (2 sec) - to access Adjust Brightness.
• A (< 2 sec) - to access ALTs.
• M (2 sec) - to access the Gas/TMT Switch Menu*.
• S (< 2 sec) - to restore screen Brightness from the Auto Dim level to the % level you last adjusted it to.
• S (< 2 sec) - to acknowledge alarms; this will also restore screen Brightness if it was dimmed by Auto Dim.
• S (2 sec) - to access Compass*.
*These items can only be accessed while viewing the Main.
PO2 during Deco
The PO2 alarms that were set do not apply when in Deco.
If PO2 reaches 1.60, the Audible will sound during which the graphics PO2 = 1.60 (red) will flash in place of Stop Depth/Time
(Fig. 56C).
After the Audible is silenced, the PO2 graphics will alternate with Stop Depth/Time once each minute*.
*PO2 graphics will be displayed for 10 seconds, then Stop Depth/Time will be displayed for 50 seconds once each minute
until PO2 decreases below 1.60, then PO2 will not be displayed.
FT
GAS 2 GTR
PSI
1270
14
136
AR
GO UP
VIOLATION
VIOL
GAS 1 DIVE
PSI
450
2
SURF
0:14
Fig. 54 - VGM MAIN
(after Audible)
Fig. 55 - VGM ON SURFACE
FT
GAS 2 GTR
PSI
2410 53
75
AR
TL
PO2 = 1.20
FT
GAS 2 GTR
PSI
2130
48
77
TL
GO UP
PO2 = 1.40
FFT
GAS 1 GTR
PSI
460
27
21
TL
PO2 = 1.60
Fig. 56A - PO2 WARNING
(No Deco Dive Main)
Fig. 56B - PO2 ALARM
(No Deco Dive Main)
Fig. 56C - PO2 ALARM
(Deco Stop Main)
alternate with
NORM