ACR&Artex C406-2 HM - Manual (Page 45)

25-62-11
Page 45 of 87
JUN 20/13
ACR ELECTRONICS, INC / ARTEX PRODUCTS
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
(9) Read the current draw on the ammeter. Steady state current draw must not exceed 200 mA.
(10) Deactivate the ELT by placing the control switch in the “OFF” position.
(11) Remove the test harness.
(12) Reinstall the battery pack in accordance with SUBTASK 25-62-11-450-001 on page 74.
SUBTASK 25-62-11-750-009
N. Digital Message Verification – Item 5g
(1) Set the 453-1000 ELT Test Set (ETS) beacon reader to receive and decode the ELT digital
message. Refer to the ETS operating manual (570-1000) for ETS operating instructions and
additional details.
NOTE: A beacon reader equivalent to the ETS may be used, provided it is capable of
receiving and decoding the 406 MHz digital message.
(2) Activate the ELT by placing the control switch in the “ON” position.
(3) Allow the ELT to transmit for appro xi a mt ely 5 seconds.
(4) Deactivate the ELT and read the test message broadcast at “turn-off”. Message examples are
shown in Figure 10.
(a) The test message broadcast by the ELT at “turn-off” contains all the information in an
actual distress message, except there is a special digital prefix that informs COSPAS-
SARSAT satellites to ignore the message.
(b) The left hand example in Figure 10, is an ELT programmed for “User Protocol ELT with
Serial Number”, with a test Hex ID. The right hand example is an ELT programmed for
“Standard Location Protocol ELT with Serial Number”.
(c) Actual messages will vary depending on the protocol and information programmed into
the ELT.
(d) If the ELT is programmed with a location (long message) protocol and disconnected
from the ELT/NAV Interface, the message will indicate “Position Invalid” in lieu of
position data, as shown in the right hand example in Figure 10.
Figure 10 Short and Long 406 MHz Message Examples
(5) Repeat the activation and deactivation cycle if the ETS fails to read the message on the initial
try. The 406 MHz oscillator may not be warmed up. If continued attempts to read the
Sarsat Beacon Reader
Beacon ID = ADDF8E345CD35D0
Message Type = Test, Short
Country = 366 USA
Aviation ELT S/N = 6521
Type Approval # = 112
Aux Locating Devices = No
121.5 MHz Beacon = Yes
Nov 13, 2009 11:39 am 55 sec
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