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3.
When on the surface, in the SURFACE or HISTORY modes the
program being displayed will move one level to another each time
the On-Sensors are activated for 1-2 seconds. Each activation will
sequence you through to the next program step.
4.
If the On-Sensors are touched fbr 4 seconds in any mode except
the DIVE PLANNER and DIVE MODE, the computer returns to the
SURFACE MODE and resumes scrolling the No-Decompression
Times. If the On-Sensors are touched for longer than 9 seconds,
the DC-12 will switch to the DIVE MODE. Surface mode program
selections may be resumed by activating the On-Sensors 1-2
seconds.
5. When in the PLAN MODE, touching the on-sensors for 9 seconds
will return the computer to the SURFACE MODE and touching the
sensors for 18 seconds will return it to the DIVE MODE.
6. Once in the DIVE MODE, if no dive is made within 4 minutes and
the On-Sensors are dry, the computer automatically returns to the
SURFACE MODE.
1. Sleep Mode
If the display of the DC-12 appears blank, it is probably in the Sleep
Mode. If the DC-12 is not actively being used, it will go into the Sleep
Mode after 4 minutes 15 seconds. The display will become blank as the
DC-12 conserves battery power. To activate the display, immerse the
DC-12 into the water or touch the On-Sensors (two metal pins beneath
the display) simultaneously with moistened fingers for 1-2 seconds. This
activates the computer and rezeroes the depth. For this reason, the DC-
12 should always be activated on the surfp.ce prior to diving. Descending
into the water immediately from the sleep mode could cause the zero
point of the depth gauge to be in error.
After activation, the DC-12 display flashes, the computer goes
through a self test and then moves into the surface mode, indicated by
the SURF indicator in the display.
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2. Surface Mode
a. Scrolling No-deco Times
The starting point of the surface program is the Surface Mode
Scroll. This program appears automatically whenever the DC-12 is
activated from the Sleep Mode, or four minutes after exiting the water
from a dive. Based on your saturation level from previous dives, the
Surface Mode Scroll will display the no-deco time limits from 41 to 149
feet (12-45 meters) (fig. 3).
Surface air
temperature
No-deco
time limit
Graphic Triangle
STOP
DEPTH
DIVE
TIME
..-.
min
.:..-"-c--+--
Graphic: no-deco
time bars
~ ft
DEPTH
1-,--+--
Scrolling depths
-SURF
HIST
DIVE
Figure 3
Scrolling no-deco time limits
The triangular bar graph above the depth display is a graphic represen-
tation of the no-deco time limit. If all four bars are displayed, at least 30
minutes of time remains. As the time limit decreases, the bars disappear
in order from the largest to smallest. The bars represent from largest to
smallest, 30, 15, 8, and 4 minutes. The number of bars will increase or
decrease in relationship to the digital no-deco time shown in the lower
left corner of the display. This provides the diver with a quick reference
to no-decompression time status. THIS GRAPHIC WILL FLASH AND
CHANGE TO REPRESENT TOTAL DECOMPRESSION TIME RE-
QUIRED IF DECOMPRESSION STOPS ARE NECESSARY. (See also
section 4-h.)
17
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