ARTEX PRODUCTS / ACR ELECTRONICS, INC
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
B406-4 (453-5004)
Page 33 of 70
25-62-03
Figure 9 Current Draw Test Setup
5)
Read the current draw on the ammeter. Measured current should be 0 µA (micro-amps), and must not
be more than 6 µA.
6)
Verify the ammeter is set to accommodate a range of at least 3.5 amps.
7)
Activate the ELT by placing the control switch in the “ON” position.
8)
Allow the ELT to stabilize for at least 30 seconds to avoid false readings.
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 25-62-03-450-001 on page 60.
SUBTASK 25-62-03-750-010
O.
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 approximately 5 seconds.
4)
Deactivate the ELT and read the test message broadcast at “turn
-
off”. Message examples are shown in
Figure 10 Short and Long 406 MHz Message Examples on page 34.
a)
The test message broadcast by th
e 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.
