Specifications

2. WARNING!
Do not al low test du ra tion to ex ceed
5 sec onds. The ELT will trans mit a
406.025 MHz sig nal af ter the ELT is ac
-
tive ap prox i mately 47 sec onds, the sat el -
lite sys tem con sid ers the trans mis sion to
be a valid dis tress sig nal.
3. If your ELT front panel in di ca tor light
is wired through ei ther the air craft mas ter
or the avi on ics mas ter switch, make sure
these switches are turned on. NOTE: If
the ELT is in stalled with an ELT/NAV In
-
ter face, en sure that both the In ter face and
the air crafts nav i ga tional sys tem are ac tive
at least 30 sec onds prior to the ELT test.
4. Tune a re ceiver (usu ally the air craft
ra dio) to 121.5 MHz.
5. Turn the ELT air craft panel switch to
“ON,” wait for 3 sweeps on the re ceiver,
which takes about 1 sec ond, and then
turn the switch back to the “ARM” (OFF)
po si tion while pay ing spe cial at ten tion to
the LED ac tiv ity upon en ter ing the “ARM”
(OFF) con di tion.
The mi cro pro ces sor in the ELT checks
the G-switch (au to matic ac ti va tion switch)
latch ing cir cuit, pins 5 & 8 on the 12-pin
con nec tor at the ELT; the 406.025 MHz
trans mit ter for proper RF out put; pres ence
of valid nav i ga tion data (ELT/NAV In ter -
face and nav i ga tion sys tem must be ac
-
tive) and a bat tery check. If the ELT is
work ing prop erly, the se quence fol low ing
en try to the “ARMED” (OFF) con di tion will
re sult in the panel LED stay ing ON for
ap prox i mately 1 sec ond then ex tin guish ing.
If a prob lem is de tected, the LED pro-
vides a coded sig nal fol low ing the ini tial 1
sec ond pulse. The coded sig nal and re -
lated prob lem are as fol lows (the LED will
flash in or der of im por tance with ap prox i -
mately a .5 to 1 sec ond pause be tween
each er ror code if mul ti ple er rors are
pres ent):
•
a) 1 flash in di cates a G-switch loop
open fail ure.
•
b) 3 flashes in di cates a 406.025 MHz
trans mit ter prob lem (i.e. bad or un con -
nected coax, an an tenna prob lem, low
power out put or a pro gram ming er ror).
•
c) 5 flashes in di cates there is no nav i
-
ga tion data pres ent. This is most likely
due to im proper wir ing be tween the
sys tem in ter face con nec tions, im proper
pro gram ming, in valid nav i ga tion data
(nav i ga tion sys tem not pow ered up) or
an ELT/NAV In ter face unit (453-6500)
is not be ing uti lized.
•
d) 7 flashes in di cates a bat tery prob
-
lem (i.e. bat tery us age time over an
hour).
There is a se quence to the prob lem re
-
port ing which is the same or der as listed
above. That is, if the G-switch cir cuit has
a fail ure, there will be a sin gle flash then
3 flashes would ap pear if there was a
trans mit ter prob lem and so on.
NOTE: For in stal la tions us ing t h e
ELT/NAV In ter face, there is an er ror con
-
di tion where the LED on the ELT and re
-
mote switch will flash rap idly. This oc curs
2 min utes af ter power is ap plied to the
ELT/NAV In ter face if the ELT is not re
-
spond ing be cause ei ther 1) the ELT is
pro grammed for a pro to col other than 24
bit and the ELT/NAV In ter face has been
strapped for a 24 bit ad dress or 2) the
RS-232 TX line from the ELT (pin 12) to
the ELT/NAV In ter face (pin 10) is not
con nected.
Af ter ini tial in stal la tion, Artex rec om -
mends a monthly “self test” of the ELT
by fol low ing the steps out lined in this
sec tion. Testing of the ELT in ex cess o f
once a month is not rec om mended as
ARTEX AIRCRAFT SUPPLIES DOCUMENT #570-5000
12/10/02 PAGE 3-18