MILITARY CYPRES USER'S GUIDE
Page 20
Airtec GmbH
Any functional defect will also cause CYPRES to abort the self-test and display a
number for approx. two seconds before switching itself off. This number is an error
code. Error code numbers are listed on page 25 along with their respective causes.
After the self-test has been completed or after you've switched off the unit, CYPRES
will ignore further inputs for one second.
If the unit is switched on by simply pressing the push button four times, it will operate
in the standard mode. This means that the CYPRES will recognize the altitude
(pressure) where it was turned on as that of the intended landing site of the jumper,
and activate at the set altitude of that CYPRES model above that site.
If an activation altitude change is desired, follow the same procedure for turning on
the CYPRES, except hold the button down after pressing it for the fourth time. If a
CYPRES with a Relative altitude adjustment configuration (see Chapter 4.4 for details
concerning an altitude adjustment) is turned on in an aircraft, the cabin pressure
must remain constant during the 30-second self-test and the following altitude
adjustment procedure. The air pressure values in the cabin and at the landing site
must be known to perform the altitude adjustment. If an altitude adjustment is made,
the CYPRES will be operating in special mode. See Chapter 4.4 for details concerning
an altitude adjustment.
Once activated, CYPRES will remain in operating mode for 14 hours, after which it
will switch itself off. Of course the unit can be switched off manually at any time.
The manual switch-off sequence is the same as the switch-on procedure. Again,
this routine is designed to avoid accidental deactivation.
