MILITARY CYPRES USER'S GUIDE
Airtec GmbH
Page 19
4.2
Switching CYPRES on
CYPRES is switched on by pressing the push-button four times. You initiate the
switching-on cycle by clicking the button once. After approx. one second, the red
LED-light will glow. You must acknowledge the red light immediately by clicking the
button again. This sequence — a click following appearance of the red light — will be
repeated two more times. After a total of four clicks, CYPRES goes into operating
mode.
If you do not act promptly after seeing the LED-light, or if you push the button too
soon, CYPRES will ignore the switch-on attempt. Simply try again — it's easy once
you've done it.
This four-click initiation cycle has been designed to avoid accidental activation.
Once the switching on procedure is finished, the unit will run through its self-test.
Initially the display will show the number 9999, and then a rapid countdown ending in
0. The countdown will take 29 seconds, and will be interrupted three times.
There will be a three-second pause between the numbers 6900 and 5700. The number
displayed at this pause will indicate the actual battery voltage (e.g. 6300 means 6.3
volts). The second and third pause will last approx. one second each, and will occur at
5000 and 100. These pauses are for technical reasons only and have no meaning to
the user.
During its self-test, CYPRES will measure the air pressure several times. Should the
unit detect large differences between pressure values, it will conclude that there is a
problem and will not proceed to operating mode. In such a case, it will abort its self-
test and display the number 100.
LED light
coming up
LED light
coming up
LED light
coming up
wait
wait
wait
click
click
click
click
self-test and
calibration
unit
switched on
