
8
VIGIL II
3. Function
3.1. General Working Principle:
The Vigil
®
must only be turned on at ground level; it will calibrate itself to the current ground elevation
pressure. This is the “GROUND ZERO” reference.
Once your Vigil
®
is on, it will at each take-off (in max. 32 sec, from +150ft or 46m) switch to active mode.
In freefall, it starts to continuously calculate the leftover time to reach the activation altitude approriate to
the programmed mode. When this altitude (or lower) is reached by the jumper at equal or superior speed
compared to the factory-set parameters, the cutter of the Vigil
®
will instantly fire and cut the closing
loop of your emergency parachute (<0,002 sec).
An “altitude correction” mode allows you to introduce a positive or negative altitude difference between
the departure and landing levels (from +6000ft to -6000 ft or from +2000m to -2000m) in steps of 150ft or
50 m. The Vigil
®
takes this altitude correction into account to calculate the new activation altitude. This
principle also allows you to modify the activation altitude permanently if the airport where you take off
and the landing zone are at DIFFERENT altitudes or if there is a hillock near the drop zone.
Each mode «PRO», «STUDENT» or «TANDEM» has its own factory-set activation altitude and speed
choice can be done in the “SET UP” menu (see § 3.3). During your aircraft ascent, the Vigil
®
’s red LED
will briefly flash three times when it passes through its pre-set activation altitude.
The Vigil
®
will automatically remain ON for 14 hours; it may of course be switched off manually before
that time. The selected activation mode «PRO», «STUDENT» or «TANDEM» will remain visible on the LCD
display until the Vigil
®
is switched off or turns off automatically after 14 hours.
If the Vigil is airborne due to a difference in pressure equivalent to more than ±150ft (±46m) compared
to the “ground zero” reference (pressure), it is highly recommended to switch off your Vigil
®
after your
last jump of the day. Be aware that your Vigil
®
will not switch off as long as its “ground zero” reference
altitude is not measured again (at ±150ft or ± 46m) by the Vigil
®
.
II handboek Engels.indd 8 10/09/12 08:09